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C-KERMIT UPDATE HISTORY

      Versions 9.0-10.0: 2011-2022

   Current development version:   10.0 Beta.04   02 June 2022
   Current released version:      [14]9.0.302    20 August 2011

   [15] DOWNLOAD BETA.04 SOURCE CODE      [16] SEE TABLE OF RECENT
   DEVELOPMENT BUILDS
   Please [17]download, build, and test this new version, and then
   [18]send me the data for an entry in the [19]C-Kermit 10.0 builds
   table.  Thanks!

   Changes since version 8.0.207 1 January 2003
   Now in reverse chronological order (newest first)

     [20]Frank da Cruz
     [21]The Kermit Project, Bronx NY.
     Last update: Thu Jun 2 11:15:42 2022 New York time

   Also see:
     * [22]Change logs for C-Kermit releases 1985-2011  (plain text)
     * [23]Announcements of older C-Kermit releases  (plain text)

   This page, which as of May 2022 would be about 200 pages long if
   printed, was originally a plain-text change log in chronological order
   (newest entries at the bottom). In May 2017 it was converted to HTML by
   a [24]text-to-html Kermit script, and as of 27 July 2020 it has been
   rearranged so the latest information is at the top and the oldest at
   the bottom, and the formatting was improved by makeshift scripts and by
   hand. All changes since July 2020 have been entered directly into this
   page.

C-Kermit 10.0 Beta.04

   In the (now) time-honored tradition of releasing a second Beta just
   hours after the first, here is Beta.04 (the curse of the odd-numbered
   Betas?).

   In Beta.03, two compilation errors that I fixed repeatedly -- at least
   one of them fatal -- somehow kept coming back. Senior confusion, no
   doubt... editing or uploading the wrong copy of the file. You can see
   why I'm anxious to get out of this business! The corrections for
   Beta.04 are:
    1. ckctel.c:
tn_ssbopt(TELOPT_NEWENVIRON,TELQUAL_SEND,(CHAR *)request,
           strlen((CHAR *)request)); /* 2022-01-27 */

       should be:
tn_ssbopt(TELOPT_NEWENVIRON,TELQUAL_SEND,request,
           strlen((char *)request)); /* SMS 2022-06-03 */

       Note EVERY makefile target should include the equivalent of
       gcc/clang -funsigned-char if available. Has anybody ever actually
       used *signed* chars??? (I haven't changed the makefile targets
       myself yet, but readers are welcome to do this for their platforms
       and report the results so I can incorporate the change where it
       works.)
    2. ckuusx.c:
ck_curpos(int row, col) {

       should be:
ck_curpos(int row, int col) {

       At least one of these (#2) prevented successful compilation on at
       least one platform (Raspberry pi OS).
       Incidentally, I find myself confused about pre-ANSI function
       argument list syntax. I see several forms in ckuusx.c:

    1.  int ck_curpos(row, col) int row, col; {...}
    2.  int ck_curpos(row, col) int row, int col; {...}
    3.  int ck_curpos(row, col) int row; int col; {...}

   Only the first one seems to be causing trouble in C-Kermit, even though
   it was allowed in K&R C (see pp. 23, 24, 54, and 58 of the original
   1978 C book). I see examples of (3) in the same book (e.g. pp. 60, 67,
   78), but I don't see examples of (2) in the book, and yet when when (1)
   caused problems and was changed to (2) the problem went away. For
   Beta.04 I'm going to err on the side of not making too many changes.

   I also have a report that constructions like "*s++;" generates "Result
   unused" warnings in Clang, e.g. in ckclib.c about line 3190, but I
   don't believe that these are a problem. As [25]Brian Kernighan said in
   1974, "The '*s' returns a character; the '++' increments the pointer so
   we'll get the next character next time around. As you can see, as we
   make things more efficient, we also make them less clear. But '*s++' is
   an idiom so common that you have to know it." In this case, were
   toodling through a string character by character in a loop. So the
   result is unused in the first iteration but will be used in the next.
   The are countless instances of this usage in the code and I doubt that
   the risk of changing them is worth the benefit.

C-Kermit 10.0 Beta.03

   C-Kermit is loaded with TCP/IP support code: Telnet, Rlogin, and FTP
   clients, Internet security methods including Kerberos and SSL, and on
   and on. This code serves little purpose in 2022 because there remain
   virtually no Telnet, Rlogin, FTP servers to connect to, secure or
   otherwise. Thus it would seem desirable to build a version of C-Kermit
   that includes no support at all for TCP/IP and its protocols and
   security methods and yet still can make SSH connections via the
   external ssh application. I spent the past three days on this; it
   required a massive reworking of the #if[n]def structure in ckcnet.c,
   ckctel.c, ckucmd.c, ckupty.c, ckutio.c, ckuus3.c, ckuus5.c, ckuus7.c,
   ckuusr.c, ckuusy.c, ck_ssl.c, as well as the ckcdeb.h header file (new
   -DNOTCPIP selector and improved -DNONET), and the makefile has
   corresponding new targets: "make linux-notcp" and "make netbsd-notcp".

   The "-notcp" builds still include support for other networking methods
   like X.25, DECnet, etc, which are also pretty hard to find in 2022, so
   I also added "-nonet" builds for Linux and NetBSD to exclude built-in
   support for all forms of networking. All of the new compile successully
   and produce runnable binaries in these configurations that can still
   make ssh connections:

   CAPTION: C-Kermit 10.0 Beta.03, 02 June 2022: default, nonet, and notcp
   builds on Linux and NetBSD.

   OS and version Architecture Build Size Compiler Status Details
   Linux Red Hat 6.10 x86_64 make linux 2401216 gcc 4.4.7 OK No errors or
   warnings
   Linux Red Hat 6.10 x86_64 make linux-notcp 1949394 gcc 4.4.7 OK No
   errors or warnings
   Linux Red Hat 6.10 x86_64 make linux-nonet 1918181 gcc 4.4.7 OK No
   errors or warnings
   NetBSD 9.2 x86_64 make netbsd 2488936 gcc 7.5.0 OK No errors or
   warnings
   NetBSD 9.2 x86_64 make netbsd-notcp 2030944 gcc 7.5.0 OK No errors or
   warnings
   NetBSD 9.2 x86_64 make netbsd-nonet 2001544 gcc 7.5.0 OK No errors or
   warnings

   Also, many of the compilation warnings in Beta.01-02 have been fixed in
   Beta.03:
     * ckuus2.c: improved "help function cvtdate" text; fixed an unquoted
       backslash in "help date" text. 21 May 2022.
     * ckuus2.c: clarified "help function stripx" text, 20 May 2022.
     * makefile: Added -DNOWTMP to macos target to suppress "deprecated"
       warnings, 19 May 2022.
     * makefile: Added "linux-pedanditic" and "netbsd-pedantic" targets to
       check for warnings I normally wouldn't see. 18 May 2022.
     * ckctel.c, about line 4669: case TELOPT_NEWENVIRON: type casts
       straightened out (again), 17 May 2022.
     * ckuusx.c, stanza starting at line 4168 slightly rearranged to
       squelch another warning, 17 May 2022.
     * ckuusx.c, declaration of ck_curpos() and accompanying comment were
       malformed, causing compilation failure, fixed 5 May 2022.

   But some warnings remain. I wanted to get this Beta out today because
   I'll be pretty much "away from my desk" for the next couple weeks.
   Meanwhile the "install" and "uninstall" makefile targets will be
   improved to handle multilevel directories without depending on
   "mkdir -p" -- which isn't portable -- but not until after Beta.03.

   Finally Beta.03 includes a new CKVKER.COM build procedure for VMS that
   Adds support for the [26]VSI SSL3 product (from SMS).

C-Kermit 10.0 Beta.01 16 May 2022 and Beta.02 17 May 2022

   [[27]Changes since Alpha.07]   [[28]What's new in C-Kermit 10.0]

   Beta.02 corrects two fatal syntax errors in non-ANSI-C builds affecting
   only HP-UX. The rest of this section applies to both Beta.01 and
   Beta.02.

   The forthcoming new release of C-Kermit, expected "pretty soon" will be
   called 10.0 rather than 9.0.305, not so much because it's radically
   different from 9.0, but because (a) it's been over 10 years since the
   previous release and (b) it'll be my final release. Afterwards it can
   be further developed (or not) by the public via Github or whatever
   other collaborative Open-Source development methods supplant it.
   Meanwhile the previous test release, 9.0.305 Alpha.07, has proven to be
   [29]quite stable. The new release should function normally on most
   modern Unix variations (and hopefully older ones as well), and also on
   VMS versions 5.4 through 8.4. I realize there are some as-yet
   unresolved issues on Solaris but there's nothing I can do about them
   without access.

   WHY NOW?:
          I have an infinitely long To-Do list for C-Kermit but I think
          it's a good idea to release this version ASAP, simply because
          the last formal release (9.0.302) fails to build on so many
          platforms where it was [30]perfectly OK eleven years ago, due to
          changes in the underlying APIs, shuffling around of header files
          on different platforms and OS distributions, and changes in the
          C language and/or compilers. In fact, previous releases WILL NOT
          BUILD on most modern Linuxes due to a backwards-incompatible
          change in glibc. And even when they do produce an executable, it
          is only after issuing reams of warnings about constructions that
          used to be perfectly legal. Unix and C badly need a "stability
          layer" to keep programs working over the long term.

   ABOUT TEST BUILDS:
          During (and for decades prior to) the C-Kermit 9.0 development
          cycle in 2010-2011, I had direct access to over [31]200
          different Unix platforms for development and test builds, not to
          mention the other OS families. Now I have access to exactly
          three: NetBSD, Red Hat Linux, and Ubuntu Linux. Before a proper
          new C-Kermit release can be made, I'll need help from users of
          the other Linux distributions, and of Mac OS X, FreeBSD,
          OpenBSD, Minix, Android, and whatever other Unix varieties are
          still viable in the 2020s, plus (Open)VMS, as well OpenSSL and
          Kerberos (especially Heimdal) programmers if those security
          methods are to be carried forward.

   THE C-KERMIT MAKEFILE:
          The makefile has evolved from a single target (4.2BSD) in 1985
          into a nearly 9000-line monster with (at this writing) over 750
          targets. I haven't made any effort to "clean it up". The world
          is a big place, and who can say that there aren't still people
          out there running ancient versions of UNIX who might need a
          newer release of C-Kermit. Anyway it's like a Unix history
          museum. As is C-Kermit itself, with code to support all those
          ancient OS's: Bell Labs Unix V7, AT&T SVR3, 2.9BSD (16-bit!),
          Cray X/MP, DG/UX, DEC Ultrix, OSF/1, Venix, IX/370, NeXTstep,
          QNX, Xenix, DYNIX, SINIX, IRIX...

   ABOUT KERMIT 95:
          Almost all the changes noted in this document were made after
          the still-current release of [32]Kermit 95 for Windows, 2.1.3 of
          1 January 2011, which is based on C-Kermit; in fact it is the
          Windows version of C-Kermit, similar the Unix version and VMS
          version. Thus all the fixes and improvements described here are
          missing from K95 2.1.3 of 1 January 2011, but will magically
          appear in [33]any new release based upon the current C-Kermit
          source code.

C-Kermit 10.0 Beta.01-02 changes since Alpha.07 [34]DOWNLOAD

   Aside from the new version number, the changes since Alpha.07 are
   modest.

|> New features

     * Serial-port speed selections for 1000000, 2000000, 2500000,
       3000000, 3500000, and 4000000 bps, suggested by Pali Rohár. The new
       high speeds have not been tested because I no longer have a
       computer with serial port.
     * New VDIRECTORY command with 1-letter synonym V, a convenient alias
       for the DIRECTORY command (and a familiar one to old [35]DEC-20
       hands) (the very first Kermit program was written on the DEC-20 in
       1981).
     * New HELP COMPACT-SUBSTRING command to show the syntax for the
       compact substring notation that was added in C-Kermit 9.0.300.
     * HELP text improved for GREP, TRANSLATE, TOUCH /MODTIME, FREAD
       /TRIM, FUNCTION DIRECTORIES, FUNCTION FILEINFO.
     * New -DNODEPRECATED parameter for makefile KFLAGS to disinclude FTP,
       Telnet, and RLOGIN clients plus WTMP logging, all "deprecated" now.
       This saves only about 200K in the executable size.
     * New Makefile targets: New "list" target to list all targets and
       "count" target to show how many targets there are.

|> Bugs fixed

     * (Beta.02 only) ckuusx.c, ckufio.c: correction of syntax errors
       affecting only non-ANSIC-C builds.
     * ckufio.c: Bug fixed affecting -DNOUUCP builds (such as Mac OS) when
       receiving a file in which C-Kermit created a bogus empty backup
       file (e.g. bug.txt.~1~). Reported and diagnosed by MacPorts port
       maintainer Lin Dongyu.
     * ckcfns.c, ckcfn2.c, ckcfn3.c, ckcpro.w: SET SEND PACKET-LENGTH
       applied to all packets when it should have applied only to Data
       packets, now it does [36]details here.
     * ckuus3.c: Bug fixed in S-Expression parser; "if (xx = 0)" should
       have been "if (xx == 0)" (did you know that C-Kermit had a
       [37]mini-LISP iterpreter built in?...  [38]What day is Easter in
       2033?)
     * ckcfns.c: The 'debug(F110,"sipkt rp","",rp);' statement in sipkt()
       had a bad argument list all these years.
     * Extraneous line in "help function tablelook" removed.
     * SET HOST command switch /TIMEOUT: was removed because the
       supporting code was never written.
     * Top-level DEBUG command that was added in C-Kermit 9.0 was removed
       because it never did anything and there was no help text for it.

|> Compiler warnings hushed

   ... most of them issued only by the very picky Mac OS Clang compiler:
     * ckcftp.c: changed a long if-else-if.. (dangling else) sequence to a
       switch
     * ckctel.c: changed:
tn_ssbopt(TELOPT_NEWENVIRON,TELQUAL_SEND,request,
        strlen(request));

           to:
tn_ssbopt(TELOPT_NEWENVIRON,TELQUAL_SEND,(CHAR *)request,
        strlen((CHAR *)request)); /* 2022-01-27 */

       in hopes of silencing some "Pointers are not assignment-compatible"
       and "Argument #1 is not the correct type" warnings on a platform I
       don't have access to (HP-UX).

     * ckcpro.w: fixed 1 dangling else
     * ckuusr.c: fixed 7 dangling elses
     * ckuus2.c: fixed 1 dangling else
     * ckuus3.c: fixed 10 dangling elses
     * ckuus4.c: fixed 67 dangling elses
     * ckuus5.c: fixed 1 dangling else
     * ckuus6.c: fixed 1 dangling else
     * ckuus7.c: fixed 1 dangling else
     * ckuusx.c: Fixed several dummy ck_curpos() declarations to suppress
       warnings.
     * ckuusx.c: fixed 2 extraneous parentheses and 1 dangling else
     * ckcfn2.c: fixed 1 dangling else
     * ckutio.c: fixed 1 dangling else
     * makefile: added -Wdeprecated-declarations to macos target (for
       logwtmp)

   "Dangling else" is (or was) perfectly legal when used correctly; the C
   language was originally designed for use by people who knew what they
   were doing and was thoroughly documented by its authors, Kernighan and
   Plauger, in a book (two really: original C and ANSI C). It makes no
   sense to keep changing this or any other programming language out from
   under all the millions of programs that have already been written in
   it.

C-Kermit 10.0: Brief summary of new features since 9.0.302

     * An [39]essential adaptation to a change in Glibc 2.28 that broke
       C-Kermit and caused several major Linux distributions to drop it.
     * SET SPEED 1000000, 1500000, 2000000, 2500000, 3000000, 3500000, and
       4000000 for high serial-port speeds on platforms that support them.
     * Numerous updates for VMS/OpenVMS operating systems from 5.4 to 8.4,
       so it is not orphaned.
     * Adaptation to Android ([40]note) ([41]build)
     * [42]Unix only: New ability to run Kermit scripts in a pipeline, and
       to otherwise behave as a typical stdin/stdout/stderr program
       (example: the [43]html script).
     * New [44]CHANGE command for changing strings in external files. Like
       when you have a website with hundreds of pages in a whole directory
       tree that link to another website whose URL changed.
     * Unix makefile: new target make linux-nodeprecated to build C-Kermit
       without "deprecated" features such as FTP, Telnet, Rlogin, Wtmp
       logging, and ([45]explained below) arrow-key support.
     * And... the [46]guts of the command processor were almost totally
       rewritten to allow IF-command and function arguments to be entered
       in a natural way. Sounds scary but I tested the result by using it
       heavily over 17 months.

   Other changes:
     * TOUCH /MODTIME:xxx, like the Unix 'touch' command, sets a file's
       date. Works on single files, multiple files, and directory trees;
       many selection criteria are available.
     * Locale support for date formats, day and month names, system error
       messages, currency notaion, sorting and collation behavior, etc,
       plus the new functions \fdayname() and \fmonthname() that return
       the full name of the given day or month in the locale's language:
       [47]locale.html, [48]remind.html.
     * New variables: \v(year) = current year, \v(month) = current month
       (three letters), and \v(nmonth) = current month (numeric) to
       complete the set that already included \v(date), \v(day), and
       \v(nday), with \v(date), \v(day), and \v(month) rendered according
       to locale.
     * New IF conditions: NEQ, LLE, LGE, BINARY, TEXT.
     * Parsing of some REMOTE commands were broken, now fixed.
     * New (ECHO xxx) command for use within [49]LISP S-expressions.
     * New \ffileinfo() function to get all the information available
       about a given file, used by the [50]Photogallery script.
     * DIRECTORY /BRIEF /EXCEPT:xxx fixed (required for [51]Photogallery),
       e.g. "dir /brief /except:*-[tr].jpg /output:IMAGES *.jpg"
     * New \ffilecompare() function (tells whether two files are identical
       or differ, used in the [52]renamejpgs script).
     * Some new date formats for \fcvtdate(): [53]photogallery.html,
       [54]remind.html.
     * In response to Unix full path names getting longer and longer all
       the time: Improved fullscreen file-transfer display to show user's
       login directory as ~/ and to truncate too-long lines from the left
       rather than the right.
     * The current directory shown in C-Kermit's default prompt now also
       uses ~/ notation to save space.
     * Numerous code changes to integrate with [55]Kermit 95 source, a
       project that was active in 2013 but never completed. If you would
       like to have C-Kermit for Windows (previously known as Kermit 95 =
       K95) and you are a Windows programmer please ([56]CLICK HERE) to
       see how you can help.
     * Numerous adaptations to newer OpenSSL versions, but more work is
       needed if anyone is actually going to make SSL connections with
       C-Kermit.
     * Countless fixes and adaptations to newer Unix platforms, libraries,
       and C compilers. Described below from [57]HERE to [58]HERE... about
       2000 lines of text. And also in the [59]abbreviated edit history
       found in the no-longer-appropriately named [60]C-Kermit Daily
       Source Archive page. This type of pointless busy work will never
       end.

   Reminder: details of each built-in function are shown by C-Kermit's
   HELP FUNCTION name command, e.g. "help function cvtdate" (or more
   briefly, "h fun cvtd").

Current and pending issues

   Version number
          The new version number, 10.0, is a change in format. Previous
          version numbers had three parts, e.g. 9.0.304
          (major.minor.edit), the new one follows the modern two-part
          convention.

          However, "10.0" also pushes the number of digits in the built-in
          \v(version) variable from six (90304) to seven (1000000)
          (built-in \v() variables go back to about C-Kermit 5A(178),
          1992, 30 years ago at this writing). Scripts that use the
          \v(version) variable in comparisons, e.g.

if \v(version) 900300 exit 1 "FATAL - C-Kermit 9.0.300 or later required."

          should be sure to use the numeric comparison operators (=, <,
          <=, >, >=, !=) and not the lexical ones (LLT, LLE, LGT, LGE),
          which worked for version number comparisons until now because
          they were all six digits.

          Future minor versions of C-Kermit should be 10.01, 10.02, etc
          (in case there might be more than ten of them), and the next
          major version should be 11.0. Note to future developers:
          C-Kermit's version numbers and dates are set near the top of
          ckcmai.c.

   Glibc conflicts
          C-Kermit has to multiplex simultaneous keyboard and
          communications i/o. The code for this has evolved over nearly 40
          years at this writing and it's rather complex. A big goal from
          the beginning was efficiency because in the early days Kermit
          might have been running on a very slow computer. Thus C-Kermit
          uses the buffered fopen()/getc() interface for less context
          switching than the bare metal open()/read() interface for each
          character. Kermit's approach was fine until I added support for
          [61]arrow keys in version 8.0 in 2003. Arrow keys are different
          from regular keys in that they generate multiple bytes instead
          of a single byte. So when there is a keyboard event Kermit has
          to peek ahead in the keyboard buffer to tell the difference, and
          if it's an arrow key, then Kermit "does something" rather than
          just transmitting the byte sequence, e.g. recalls the previous
          command. So far so good. But the API for peeking ahead is
          apparently offensive to the glibc people, and they are intent on
          removing it. The first step took place in 2021 and the result
          was that C-Kermit failed to compile. A workaround was found that
          fixed the problem, but the Gnu people don't approve of it and
          are determined to remove all possible ways of "poking around in
          stdio internals on *any* platform". They say that they will
          "consider" adding "musl-compatible __freadahead", whatever that
          is, maybe before they pull the plug on the current setup, maybe
          not. So the day will come when C-Kermit breaks again and then
          there will be four possibilities:

         1. Give up on arrow keys and rebuild C-Kermit with -DNOARROWKEYS
            (this has always been possible);
         2. Change thousands of lines of code to do single-byte instead of
            buffered reads as the Gnu people suggest;
         3. Take advantage of the new __readahead thing if it's
            appropriate but this won't be portable to older Linux
            versions;
         4. The Linux application packagers drop C-Kermit again.

          In the great scheme of things maybe arrow keys aren't so
          important, but who really knows? And then what happens when they
          change something else? The Gnu folks have a very narrow view.
          C-Kermit is not just a Linux program; in fact it predates Linux
          by six years. C-Kermit is portable among at least [62]nine
          different operating system families and at least [63]190
          different Unix varieties, the vast majority of which do not have
          Glibc. How can a total rewrite of C-Kermit's terminal i/o be
          tested on all those platforms? C-Kermit's code has been
          painfully, scrupulously designed to be portable among all those
          platforms. Most of them might be "legacy" now but that does not
          mean that they don't still exist and that people and companies
          and schools and government agencies don't depend on them for
          vital functions.

          In my view it is a CRIME to change an API when unknown numbers
          of programs rely on it and unknown numbers of people could
          depend on those programs. The entire world increasingly depends
          on software written in C for Unix, and particularly Linux. The
          absolute TOP priority for any new release of Linux or C or its
          libraries must be to preserve backwards compatibility so
          existing programs continue to compile, link, and work. This was
          a priority back in the days when software (including compilers)
          was mainly written by paid professionals who were responsible to
          -- and in touch with! -- their users. Today's Wild West software
          culture is not an improvement. Meanwhile I added a new target to
          the makefile:

make linux-nodeprecated

          do eliminate everything that has been deprecated (directly or
          indirectly) up to now: FTP, Telnet, Rlogin, Wtmp logging, and
          arrow-key support. I'm sure I must have missed a few; they can
          be added at the top of the ckcdeb.h file.

   Security methods
          For the major surviving Unix-based operating systems such as
          Linux, *BSD, and Mac OS, the main default makefile targets (e.g.
          "make linux") do NOT include any security features such as SSL
          or Kerberos and never have. Separate targets are provided for
          the desired kind of security code, e.g. "make linux+ssl", "make
          linux+krb5", "make linux+krb5+ssl". But C-Kermit's interfaces to
          OpenSSL, Kerberos, etc, are not necessarily up to date or even
          functional. SSL and Kerberos programmers are welcome to make
          fixes and I will incorporate them into subsequent 10.0 Betas. As
          of 10.0 Beta.01 these builds work on certain platforms but not
          on others, depending mainly on which SSL and Kerberos versions
          are installed on the host. Summary:

          + Kerberos IV and V support in Kermit should be up to date and
            solid, but many sites have switched from MIT Kerberos to
            Heimdal, which Kermit doesn't support, in which case builds
            such as "make linux+krb5" fail (some Heimdal code is present
            but evidently not enough).
          + Some adaptations to newer OpenSSL versions have been made but
            the target is moving too fast to keep up, and most builds such
            as "make linux+ssl" either fail or get tons of warnings.
          + Telnet and FTP servers secured by OpenSSL or Kerberos have
            vanished, and these were the whole reason that C-Kermit
            included these security methods.
          + The SSL and Kerberos code is still included in the source code
            if anybody cares to bring them up to date, presumably and
            preferably in a backwards-compatible way, so C-Kermit could be
            built with (e.g.) any version of OpenSSL, not just the latest
            one.

   WTMP log
          Apparently WTMP logging was "deprecated" in Macintosh OS at some
          point after C-Kermit 9.0 was released, resulting in "deprecated"
          warnings in ckufio.c. WTMP logging is (was) done when C-Kermit
          is running as a [64]Kermit Internet Service Daemon (IKSD,
          similar to an FTP server but better) to log the sessions it
          hosted. Presumably WTMP will disappear some day and then
          C-Kermit builds will get fatal errors and compile time or link
          time. Kermit can be built without IKSD (and WTMP) by including
          -DNOIKSD in the KFLAGS. It can be built with IKSD but without
          WTMP via -DNOWTMP.

   Internet Kermit Service Daemon
          IKSD was secured by Kerberos or OpenSSL or any of C-Kermit's
          other built-in security methods, but since all of those are now
          in limbo, at least in terms of C-Kermit's interface to them,
          IKSD is no longer very useful. Still, it was a good idea and an
          even better one now in light of the retirement of FTP service.
          It could be revived using the external ssh client on the end
          that makes the connection (e.g. "ssh somehost.org 1649"), and an
          ssh server on TCP port 1649 that starts C-Kermit with the
          [65]appropriate command-line options and with its stdin/out/err
          redirected to the ssh connection.

   Terminal emulation
          C-Kermit does not do terminal emulation. It simply writes
          incoming meterial to the screen, and passes your keystrokes
          along to the other computer. Terminal emulation is provided by
          the window in which C-Kermit is running. Normally this is not an
          issue, but one very handy feature that other terminal emulators
          (such as Kermit 95) have but C-Kermit lacks is key mapping ,
          where you can assign any key or key combination (e.g. Alt-h,
          Ctrl-Alt-Shift-q, F1, Insert, etc) to send (or do) whatever you
          want. C-Kermit can't do that because it doesn't know what keys
          you actually pressed because either (a) your keyboard is
          connected to a different computer than the one where C-Kermit is
          running, or (b) there is no reliable and portable Unix API for
          obtaining key events and scan codes. C-Kermit does, however,
          have a SET KEY command, but it works only with [66]ASCII keys
          (printable and control-characters).

          Unlike all the other C-Kermit versions (Unix, VMS, etc) C-Kermit
          for Windows -- previously known as Kermit 95 or simply K95 --
          does do terminal emulation because it is running on the same
          computer your keyboard and screen are connected to, so it can
          capture keycodes and write to video. Let's hope C-Kermit for
          Windows (CKW) can be released some day soon; if you're a Windows
          C programmer and would like to help out, [67]CLICK HERE.

   Error messages
          C-Kermit's runtime error messages, especially those emanating
          from scripts, are particularly uninformative, as is the
          \v(lastcommand) variable. It's because some commands are
          executed by internally-defined macros composed of multiple
          commands, calling each other recursively. Also, a large chunk of
          code surrounded by { ... } in a script looks like a single
          command to the parser.

   Text blocks
          There has never been an intuitive way of assigning a multiline
          text block as the value of a macro. For example:

define sometext {
This is some text.
This is the second line.

The line above is empty.
  This line is indented.
This line is not.
}

          "echo \m(sometext)" shows leading and interline spaces
          eliminated, and the lines themselves are gathered into a single
          comma-separated-list. A whole new data structure would be
          required to accommodate multiline text blocks.

   Variable evaluation
          For historical reasons all \%x variables and \&x[] arrays are
          evaluated recursively. This is almost never desired and can
          wreak havoc when a value is a DOS or Windows pathname in which
          the directory separator is backslash. A "[68]set
          variable-evaluation" command was added in C-Kermit 9.0, with
          choices "recursive" (default) and "simple". The default can
          never be changed to "simple" because that could break countless
          scripts that actually take advantage of the original evaluation
          method. But if you are writing a script with no intention of
          recursing and want to avoid having your \%x and \&x[] variable
          values garbled, put:

     if >= \v(version) 900000 set variable-evaluation simple

          at the beginning of the script. That way if your script is
          processing external data that happens to contain any
          backslashes, nothing bad will happen. But if someone executes
          the same script with C-Kermit 8.0 or earlier the risk is still
          there. Of course your script could print a warning, or even
          require an appropriate C-Kermit version. Meanwhile even with
          recursion disabled globally you can still force recursion when
          needed with the \frecurse() function:

\frecurse(s1)
 s1 = name of \&x or \&x[] type variable
Returns the result of evaluating the variable recursively.

   Minor bugs
          TOUCH /MODTIME:datetime does not accept all different date-time
          formats, only numeric yyyy:mm:dd:hh:mm:ss or yyyy:mm:dd. The
          HELP TOUCH text was updated to say this.

C-Kermit 9.0.305 Alpha.07 24 January 2022

   Only some minor changes this time, mainly to eliminate warnings from
   increasingly picky C compilers, e.g. "using the result of an assignment
   as a condition without parentheses" (which has always been perfectly
   legal), or "cast from pointer to integer of different size", etc. Some
   trouble with wait.h and time.h (where are they???): hopefully
   ameliorated, at least on some platforms. #include "ckuath.h" was
   omitted from three source files that needed it, and some
   ck_tn_enc_start/stop() routine references were misspelled, affecting
   only builds that included the optional SSL, Kerberos, or other security
   features.. A few missing text files were added to the tarball/zipfile
   so "make install" will work (not that you'd want to install an Alpha
   test, but somebody tried to and got the errors so...).

   This version builds with MIT Kerberos 5 but not with Heimdal Kerberos.
   No work has been done on OpenSSL either, C-Kermit builds ok with it on
   some platforms, gets lots of warnings on others but still seems to
   work, and fails to build at all on others. Anyone who cares about this
   and can rectify the situation is welcome to pitch in!

C-Kermit 9.0.305 Alpha.06 15 December 2021

   C-Kermit was first written in 1987 in the version of C that was
   specified in the then-current first edition of The C Programming
   Language by Kernighan and Ritchie (Prentice-Hall 1978). As the language
   became more and more standardized (or less and less, depending how you
   look at it: C89, C90, C95, C99, C11, C17, C2x... -- as someone said,
   "The nice thing about standards is that there are so many to choose
   from")... it became possible to write the same code in different ways.
   For example, there was an "old way" and a "new way" to declare a
   function. In a later version of C, the compiler might complain if you
   did something the old way and, conversely, if you did the same thing
   the new way then compilation would fail with older compilers.

   A central principal of C-Kermit development is to keep all new releases
   backwards compatible, not only in its command repertoire but also in
   its compilability on every platform where it could be compiled before
   no matter how dated its C compiler might be. This is accomplished with
   a huge number of #ifdefs in the code; for example, every function is
   declared two different ways so it can be compiled by both old and new
   compilers.

   Backwards compatiblity was preserved through C-Kermit 9.0.302 of 2011.
   This was possible because the Internet was still open enough for
   developers to get access to hundreds of different platforms going back
   to the early 1980s (e.g. 4.2BSD Unix, Bell Research Unix v8, early
   Xenix versions). Those days are gone, and so now non-backwards
   compatible code can creep into C-Kermit unnoticed until compilation is
   attempted on some old platform that the developers have no access to.

   After the publication of C-Kermit 9.0.305 Alpha.05 such a platform was
   encountered and numerous problems uncovered: unprotected ANSI-style
   function declarations, initialization of automatic arrays, and even the
   use of C++ features, such as // to introduce single-line comments.
   These were caught when Peter Eichhorn, Assyst GmbH, Aschheim-Dornach,
   Germany, C-Kermit's Mr. HP-UX since the late 1980s, who is responsible
   for most of the HP-UX makefile targets, started doing HP-UX builds for
   the first time since 2011. It turns out the HP-UX compiler (HP C 76.3
   in this case) implements multiple C language definitions. By default it
   compiles in non-ANSI, non-optimizing, 1978 K&R C mode and complains
   loudly about any ANSI-C constructions it encounters, and then fails. A
   blessing in disguise, I'd say, since I no longer have access to any
   old-time machines or compilers to check backwards compatibility myself.
   So over the course of a week or two Peter found each problem
   (approximately one per day) and we fixed it. Hopefully, these fixes
   will allow builds on other pre-ANSI C platforms that C-Kermit has
   traditionally supported.

   Meanwhile, two important notes:
    1. C-Kermit's Kerberos support is now officially "deprecated". MIT has
       indicated that it no longer serves any purpose since no Kerberized
       Telnet or FTP servers are known to still be in service. The code
       won't be removed, and if anybody (including myself) can fix a
       problem, it will be fixed.
    2. Similarly, C-Kermit's OpenSSL support is also deprecated because no
       Telnet-S or SFTP servers are known to be in use any more, so there
       is no practical use for this code, even if it works. Unlike
       Kerberos, OpenSSL keeps shifting and changing out from under
       C-Kermit so that C-Kermit has adapted to each new OpenSSL release
       while still working with all the earlier ones. If someone other
       than me wants to take this on, fine, but it should not be done in a
       way that would break backwards compatibility with earlier OpenSSL
       releases; plenty of sites are still running 0.9xxx OpenSSL
       versions. The code will be left in place with little expectation
       that anybody will use it.

   Here are the changes in Alpha.06:
     * 15 Dec 2021:
       New makefile from Peter Eichhorn that enables successful
       compilation on both HP-UX 10.00 and 11.00. Makefile and main
       program dates changed 15 Dec 2021.
     * 10 Dec 2021:
       On HP-UX 10.00, error 'cc: "ckcuni.c", line 16153: warning 562:
       Redeclaration of "isunicode" with a different storage class
       specifier: "isunicode" will have internal linkage.' This suggests
       that the system header files have their own prototypes for some
       library routine or variable of the same name. So I changed all
       references to isunicode to ck_isunicode. Luckily C-Kermit has a
       command for that:

     change /list *.[ch] isunicode ck_isunicode
     * 9 Dec 2021:
       The hpux1000 makefile target (Hewlett-Packard Unix 10.00) build
       successfully for the first time, after much work. This was with HP
       C version 76.c and much assistance and detective work by Peter
       Eichhorn. A new directive -DNO_PTY_XOPEN_SOURCE was added to get
       arround problems caused by the #define _XOPEN_SOURCE 500 directive
       that was added in 2014 (several years after C-Kermit was last built
       on HP-UX 10.00), which in turn was added to get around some other
       problems.

     When building C-Kermit 9.0.305 Alpha.06 or later, if you get
     seemingly nonsensical error messages when compiling ckupty.c, add
     -DNO_PTY_XOPEN_SOURCE to the makefile target's KFLAGS and try again.
     If that doesn't do it, then remove pty support altogether with
     KFLAGS="-DNOPTY"; this also works with older C-Kermit versions, but
     it sacrifices C-Kermit's ability to make SSH connections.
     * 9 Dec 2021:
       ckuusy.c:1538: char xbuf[32] enlarged a bit to silence warnings.
     * 9 Dec 2021:
       ckcfns.c:3364: debug(F110,"sipkt rpar","",rp); had its last two
       arguments reversed.
     * 9 Dec 2021:
       ckuusr.c about line 7928 - changed this:
char * tags[] = { "_whi", "_for", "_sw_", "_if_" };

       to this:
static char * tags[] = { "_whi", "_for", "_sw_", "_if_" };

       In its earlier form, this statement would not be understood by a
       pre-ANSI C compiler, in which initialization of automatic arrays
       was not supported. This change is OK because the tags[] array is
       not referenced in any other modules.
     * 8 Dec 2021:
       Removed a Ctrl-G character that was accidentally inserted into
       ckupty.c, and one remaining old-school formfeed (Ctrl-L) in ckcfn2,
       found by Peter Eichhorn. Plus: Minor type or dimension mismatches
       between original and extern array declarations.
     * 7 Dec 2021:
       ckuusr.c: Enclose #include "ckuath.h" in #ifdef CK_AUTHENTICATION
       .. #endif. Given the 10+ modules that #include "ckuath.h" it might
       have made more sense to check this in ckuath.h itself, but all the
       modules bracketed the #include with ifdef
       CK_AUTHENTICATION..#endkf; ckuusr.c is the only one that didn't,
       and this caused failure in a non-ANSI compilation.
     * 7 Dec 2021:
       ckuus3.c: removed 19 C++-style single-line comments (//), which
       blow up old C compilers (or, in this case, modern ones operating in
       non-ANSI K&R) mode. (A pty is a psuedoterminal; Kermit's pty
       support is the basis of its SSH command, which lets you make secure
       SSH connections from C-Kermit to another computer; it also lets
       C-Kermit make a connection to a local application, such as Bash or
       EMACS.)

C-Kermit 9.0.305 Alpha.05 14 November 2021

   As of December 6, 2021, 56 builds are listed in [69]this table; 48 of
   them successful, 8 of them failed.

     * 16 Nov 2021:
       Tony Nicholson reports clean builds of the November 14 code on:
          + macOS Catalina (10.15.7) x86_64 using "make macos"
          + macOS Monterey (12.0.1) arm64 using "make macos"
          + OpenVMS VAX V7.3 with Process Software Multinet 5.5 TCP/IP
            using @CKVKER "O"
          + OpenVMS Alpha V8.4-2L1 with Process Software Multinet 5.5
            TCP/IP using @CKVKER "O"
          + Raspberry PiOS-32 Buster (Debian 10) using "make linux"
       These are in addition to the succesful builds in the 14 November
       entry just below.
     * 14 Nov 2021:
       From William Bader:
       "Fedora 34 doesn't have the Heimdal version of kerberos, and
       ckuath.c had some sections that needed an ifdef." I applied the
       diff but result does not build on NetBSD: "com_err.h: No such file
       or directory".
       Couldn't build in on Ubuntu because I don't have krb5 installed.
       Build failed on Red Hat: "/usr/bin/ld: cannot find -lgssapi".
       I'm not super concerned about Kerberos or SSL because I have no
       evidence that anybody is using them in C-Kermit.
       From Steven Schweda:
       Removed the "#if 0" command in ckcdeb.h about line 6149, which is
       now extraneous. He also suggested removing the '#include
       "ckodir.h"' from ckuus6.c, but let's not do that until until we can
       once again check C-Kermit builds on MS Windows. He also suggested
       the printing of the MAXPATHLEN value in "show features" but it's
       not doing any harm, and until and unless CKMAXPATH can be 100%
       certified as the same thing, let's leave it in so at least we can
       check in case of any further confusion. Also he noticed some
       variations in the file permissions, now fixed. No functional
       changes.
       From Tony Nicholson:
       I've confirmed a few file transfers using the new version against
       CP/M Kermit-80 v4.11 and PDP-11 T3.63 running under RSTS/E V10.1
       (which has some extra fixes by Johnny Billquist on top of Brian
       Nelson's last version from the Kermit Archive). I'm using a USB to
       serial adapter (FTDI chipset) on my Mac minis to connect up via a
       LAT terminal server for my CP/M and PDP-11 tinkering as well as
       Kermit's built-in Telnet too.

       Kenji Rikitake reports clean builds of the November 7th upload on:
          + macOS 11.6.1 x86_64 with Xcode 13.1 (with the new target "make
            macos")
          + Ubuntu Linux 21.10 x86_64
          + Raspberry Pi OS kernel 5.10.63-v7l+ on Raspberry Pi 4B
       Steven Schweda reports clean builds on:
          + OpenVMS 8.4 on HP rx2600 IA64 (no SSL)
          + OpenVMS 8.4-2L3 on HP rx2660 IA64 (both with no SSL and
            vendor-supplied SSL 111 V1.1-1L based on OpenSSL 1.1.1l).
       William Bader got a clean build on:
          + Fedora 34 with non-Heimdal (MIT?) Kerberos
       I get clean builds (without SSL or Kerberos) on:
          + Red Hat Linux 6.1
          + Ubuntu Linux 20.04.1
          + NetBSD 9.2
     * 7 Nov 2021:
       From Tony Nicholson: a newline was required in ckutio.c at about
       line 2493 to indicate an empty statement. A patch to ckudia.c at
       line 4995 that I missed. For VMS, ckvker.mms was missing from the
       Zip file.
     * 6 Nov 2021:
       From Tony Nicholson in Australia, who put a great deal of effort
       into clearing warnings from Apple's LLVM Clang C compiler that I
       don't get with gcc, notably tons of "add explicit braces to avoid
       dangling else". The original code is correct and complies with the
       definition of the C language, but is now considered dangerous by
       zealots. Also several warnings about constructions like while (c =
       *s++) { ... }: "place parentheses around the assignment to silence
       this warning". What I don't understand is how large segments of the
       world's economy can be based on software written in a language that
       keeps changing out from underneath it.
          + makefile: Entirely new entries for macOS (new new name for
            Mac OS X and OS X). Use "make macos" on newer macOS versions;
            use "make macosx" for older ones. I'm not sure exactly where
            the cutoff is. Also an error in the linux entry where one of
            the "if test" clauses was missing the "if".
          + ckcftp.c: xx.os_specific = NUL; -> xx.os_specific = ""; at
            about line 12575.
          + ckcmai.c: Added #include
            multinet_root:[multinet.include.sys]time.h For VMS systems
            with Multinet TCP/IP, instead of <time.h> and then don't
            comment out
          + ckcuni.c: Typo corrected at line 8268... if (c && 0xff80)
            should have been if (c & 0xff80).
          + ckucns.c: xx.typ = 0; xx.dsp = XYFZ_A; xx.os_specific = NUL;
            -> xx.typ = 0; xx.dsp = XYFZ_A; xx.os_specific = ""; at line
            469.
          + ckcdia.c: if (lbuf && *lbuf) -> if (strlen(lbuf) > 0) at line
            4994.
          + ckcdia.c: Several corrections in the "mymdmtype" section.
          + ckuusr.c: Added missing "#include ckuath.h" for Kerberos
            builds.
          + ckuus6.c: Supplied a missing %s for printf("?Modtime error on
            backup file:") about line 6303.
          + ckuusx.c: For newer macOS's in the termcap-related #ifdefs
            starting around line 30, #include <curses.h>.
          + ckutio.c: added missing semicolon after "for (p = ttname;
            isdigit(*p); p++)" at line 2490 (but I had already done that)
          + In several modules the only change was an insertion of a blank
            line; I left those as-was: ckuus2.c ckcpro.w.
       Tony says, "I've managed to eliminate all but two warnings when
       compiled under macOS Catalina (10.15.7) on a x86_64 Mac mini, and
       under macOS Monterey (12.0.1) on an arm64 Mac mini. The remaining
       warnings are to do with use of a deprecated logwtmp() routine --
       still present in the current version of macOS."
     * 6 Nov 2021:
       From Steven Schweda, patches for: Compaq OpenVMS VAX V7.3, VSI
       OpenVMS AXP V8.4-2L1, andVSI OpenVMS V8.4-2L3 for Integrity, sent
       via Tony:
         1. An entirely new ckvker.com (DCL build procedure, the "VMS
            makefile").
         2. An entirely new ckvfio.c module.
         3. ckcdeb.h: A comment about the definition of MAXPATHLEN (or
            lack of it) on VMS, clarifying a previous comment that is
            still there but "#ifdef 0"'d.
         4. ckctel.c: Two references to MAXPATHLEN changed to CKMAXPATH
            (explained in ckcdeb.h comment).
         5. ckufio.c: A reference to MAXPATHLEN in a comment at line 7436
            changed to CKMAXPATH.
         6. ckuus3.c: Two reference to MAXPATHLEN in a stanza around line
            12200 changed to CKMAXPATH.
         7. ckuus4.c: An allusion to MAXPATHLEN appears in a comment about
            line 64; I clarified that this section applies only for Kermit
            95 for MS Windows and IBM OS/2 and didn't change it because
            OS/2-specific modules probably still use MAXPATHLEN rather
            than CKMAXPATH but we can deal with that if ever
            [70]development on K95 resumes. Also, two references to
            MAXPATHLEN around line 10420 were changed to CKMAXPATH. A
            misplaced #endif matching #ifndef VMS at line 13942 was moved
            two statements down, where it should have been.
         8. in ckuus5.c at about line 10344 in the SHOW FEATURES code;
            Steven changed MAXPATHLEN to CKMAXPATH, but I left the
            original and then added a new one for CKMAXPATH; this might be
            more helpful for troubleshooting.
         9. ckuus6.c: "???" by #include ckodir.h in an
            OS/2-Windows-specific section, same as in item 7 above.
            Changed all 17 other occurrences of MAXPATHLEN to CKMAXPATH.
        10. Corrected two misspellings of "weird" in comments.
     * 1 Nov 2021:
       From Tony Nicholson, in ckcdeb.h, about line 6143:
#ifndef MAXPATHLEN
def MAXPATHLEN 1024
#endif  /* MAXPATHLEN */

       should have been:
#ifndef MAXPATHLEN
#define MAXPATHLEN 1024
#endif  /* MAXPATHLEN */

       How'd that happen!
     * 26-29 Oct 2021:
       Bug: Reported by Jacques Charreyron: when C-Kermit was told to SET
       SEND PACKET-LENGTH 10 (by mistake, as it happens), the file that
       was sent (very slowly) arrived with its name truncated.
       Background: The SET SEND PACKET-LENGTH command is a relic of the
       days files were transferred over extremely sensitive and unreliable
       connections such as a noisy telephone line before the days of
       high-speed flow-controlled error-correcting modems (let alone the
       Internet). The longer a packet, the greater the chance of
       corruption by noise. The SET SEND PACKET-LENGTH command was a way
       to force a file through at a cost in efficiency.
       Analysis: This feature was implemented with insufficient thought:
       it limited the length of ALL sent packets including the
       "administrative" ones like those used for feature negotiation at
       the beginning of the transfer and for the filename. It doesn't
       matter what length file data packets are because each one carries
       just a piece of the file, and they are all reassembled by the
       receiver. But the protocol does not allow feature-negotiation
       strings or filenames to be split up over multiple packets. Maybe it
       should have.
       So now C-Kermit has been changed to apply the SEND PACKET-LENGTH
       setting only to outbound file Data packets. This is a rather
       fundamental change that, in a sense, has an impact on the
       definition of the protocol if only by making explicit the
       difference between administrative and data packets.
       The feature negotiation packets are about 30 characters (bytes)
       long and have never presented a problem. However, a filename can be
       any length at all. If it is longer than about 90 characters, it can
       be sent only in a long packet with prior permission from the file
       receiver, allowing file names up to about 9000 characters in
       length. If the filename is longer than the negotiated limit, even
       with today's fix, it is truncated. The fix, however, means that if
       the receiving Kermit doesn't support long packets, filenames longer
       than about 88 characters are truncated. This hardly ever happens in
       practice because filenames are rarely that long.
       But the story doesn't stop there because the file receiver can (but
       is not required to) send the name under which it stores the
       incoming file, perhaps including the path, so the user knows
       exactly how to find it on the receiving computer. This might be
       considerably longer than the original if it includes a path, such
       as:
       /net/w/0/htdocs/fdc/kermitproject/ftp/kermit/archives/
       (That's a typical path on one of the computers I use.) The pathname
       can also be included in the sender's filename packet if you SEND
       /PATHNAMES:ABSOLUTE. But apparently nobody does this in combination
       with SET SEND PATHNAME-LENGTH because I have never received a
       complaint.
       The fact that it took 40 years for this problem to surface does not
       suggest a looming crisis and anyway, it's too late to change the
       protocol. Meanwhile, if we start having problems with very long
       filenames, various approaches are possible, such as:
          + Do nothing; let long names be truncated. This could result in
            files overwriting each other; for example, a series of files
            whose names have the same first 100 characters, followed by a
            serial number. Overwriting in a case like this can be avoided
            with an appropriate SET FILE COLLISION command on the
            receiving end.
          + Have the file sender convert too-long names into shorter names
            that are likely unique; for example, random sequences of
            letters and digits. In this case the user would have to pay
            attention to Kermit's messages to be able to identify the file
            on the receiving end, or to LOG TRANSACTIONS to have a record.
       Disposition: C-Kermit code was changed to make the SET SEND
       PACKET-LENGTH value apply only to outbound Data packets. Modules
       affected: ckcfns.c, ckcfn2.c, ckcfn3.c, ckcpro.w.
     * 13 Oct 2021:
       Changed "%d" in sprintf(vvbuf,"%d",crc16); in nvlook() to "%ld" to
       agree with type change of crc16 from int to long on 8 Oct 2020.
       ckuusr.c.
     * 13 Oct 2021:
       Added serial-port speed of 1500000 bps (1.5MHz), from Elad Lahav.
       Enabled for Linux and QNX. ckcdeb.h, ckutio.c, ckuus3.c.
     * 13 Oct 2021:
       Ao Huang noticed a problem when sending a binary file over a Telnet
       connection using XMODEM external protocol via the sx application:
       if the data contains a 0xff byte (which is also Telnet IAC), it is
       doubled as it should be, but the next byte is skipped. Fixed in
       ckutio.c ttptycmd() about line 14998.
     * 30 Sep 2021:
       From Sébastien Villemot; a printw() statement was changed to
       fputs() to avoid gcc -Wformat -Werror=format-security warning on
       Debian. ckuusx.c,
     * 8 May 2021:
       From Kenji Rikitake, for modern Macintoshes (say, after Mac OS X
       10.12?): in ckuusx.c in the termcap-related #ifdefs starting around
       line 30, #include <term.h>.

C-Kermit 9.0.305 Alpha.04 14 September 2021

   The following C-Kermit source files specific to the VMS version:

ckvold.c
ckvcvt.c
ckvrtl.c
ckvcon.c
ckvioc.c

   in my working directory on Unix had lines terminated in CRLF (Carriage
   Return and Line Feed), which is appropriate for VMS, but not on a Unix
   file system. The install script created a Zip file that converted *all*
   source files to VMS format, but since these were already in VMS format
   and the zip program wasn't smart enough to recognize this, the copies
   of these files in the Zip archive were corrupted. Thanks to David
   Hittner for noticing and diagnosing the problem. 14 Sep 2021.

   Also corrected a number warnings from the VMS C compiler reported by
   David Hittner, who is attempting to revive C-Kermit for VMS, including
   the new x86-64 version:
     * Reference to uninitialized 'ss' variable in a debug() statement in
       ckclib.c cksplit().
     * The MAXPATHLEN symbol came up undefined in ckuus4 fneval() so I
       added a catch-all definition for it in ckcdeb.h for when, after
       including all the other header files where it should be defined,
       it's still not defined. I arbitrarily chose 1024 as the value; this
       might need tuning. This change also fixes an error in the
       declaration of chgsourcedir[] in ckuus6.c
     * Variable "linkname" not declared in ckuus4.c fneval for
       \ffileinfo(). This is not surprising since VMS doesn't have file
       links. Rearranged the code so looking for a link happens only in
       Unix.
     * ckuus5.c evalmacroarg() changed from int to VOID because it doesn't
       return a value.
     * ckuus6.c domydir() CHANGE command code error message "not a text
       file" was missing the filname argument.
     * ckuus6.c domydir() CHANGE command code symbol STRDIRSEP was not
       defined for VMS -- an oversight; fixed in ckcdeb.h.
     * ckuus6.c domydir() CHANGE command code modtime error message too
       many arguments; added missing %s.
     * ckuus6.c boolexp(): another missing conversion specifier in a
       printf.
     * ckvtio.c ttflui(): "while ((n--) && xx_inc(2) >= 0) ; /* Ignore
       Warning - see comments */" (see comment in source code).

   Updated version and date info in ckcmai.c. 14 Sep 2021

C-Kermit 9.0.305 Alpha.03  (THIS ONE WASN'T UPLOADED)

     * The "extern int errno;" declaration included by default for many
       non-Glibc Unixes has become a big problem. So I added a symbol
       DCL_ERRNO that can be defined in any desired makefile target,
       otherwise the declaration is omitted except on some old platforms
       where it has always been needed (e.g. some old Cray
       supercomputers). In the "linux" makefile target (which is supposed
       to work for ALL versions of Linux back to Day Zero), I added a
       stanza to check whether errno was declared in any header file and
       then only if it is not, to include DCL_ERRNO in the compilation
       flags at make time. This is in case any old, old Linux releases did
       not declare it (which I doubt) but anyway now this stanza can be
       added to other targets where errno might or might not be declared
       in the header files, or in any other anomolous cases. Or you can
       just include it in your 'make' command:
           make targetname KFLAGS=-DDCL_ERRNO
       Note that -DDCL_ERRNO results in "extern int errno;", and so is
       mainly appropriate for old platforms where errno is, indeed, an
       integer. In any case, after the special cases (CRAY, STRATUS,
       glibc), if DCL_ERRNO is not defined then we "#include <errno.h>".
       Modules affected: ckcdeb.h, makefile, 7 October 2020.
     * Removed "extern int errno.h" conditionalized for VMS from ckcfns.c
       because this was already handled in ckcdeb.h, which is included by
       every C-Kermit module. Note that many other modules already include
       errno.h: ckcftp.c, ckcnet.c, ckcnet.h, ckuath.c, ckucmd.c,
       ckucns.c, ckucon.c, ckufio.c, ckupty.h, ckutio.c, ckuus4.c,
       ckuus6.c, ckuus7.c, ckuusx.c. Better not to touch these unless
       conflicts arise, and rely on the header file's normal protection
       against multiple inclusion. ckcfns.c, 8 Oct 2020.
     * In the code for the SET SSL CIPHER-LIST and SHOW AUTHENTICATION
       commands, changed the SSL_METHOD function from TLSv1_method() to
       SSLv23_method(). Patch from "$NetBSD: patch-ckuus3.c,v 1.1
       2020/04/08 15:22:07 rhialto Exp $". ckuus3.c, ckuus7.c, 8 Oct 2020.
     * Changed extern int crc16 to extern long crc16 in ckuus4.c. Patch
       from "$NetBSD: patch-ckuus4.c,v 1.1 2019/04/11 02:21:09 mrg Exp $".
     * Updated ckuusr.c edit number and date, because ckuus3.c and
       ckuus7.c are just two of nine parts of what was originally a single
       module. 8 Oct 2020.
     * Updated C-Kermit's date and Alpha level. ckcmai.c, 8 Oct 2020.

C-Kermit 9.0.305 Alpha.02 19 September 2020

   From Sébastien Villemot (Debian): Remove clauses from the linux+krb5,
   linux+ssl, and linux+krb5+ssl makefile targets that tested to see if an
   executable was actually created, because they violate Debian policy.
   makefile, 18 September 2020.

   From Sébastien Villemot (Debian): Add another "else if" to the search
   for the Kerberos 5 com_err library for Multiarch systems. makefile, 18
   September 2020.

   Addressed warnings issued by gcc 9.3.0 on Ubuntu 20.04.1:
    1. sprintf() into a buffer declared to be 10 bytes long when values
       could (but never would) overflow it: function hhmmss(); increased
       the buffer size to 60. ckclib.c, 18 Sep 2020. NOTE: there were many
       warnings like this. In almost every case the code prechecked the
       length of data to be moved into the buffer. These warnings forced
       me to make buffers bigger unnecessarily. But why don't I just use
       snprintf()?  Because C-Kermit is supposed to build on hundreds of
       different platforms, some dating back to before there was an
       snprintf().
    2. Same thing for obuf[] in function shuffledate() (six times) and
       once for tmpbuf[] in function cmcvtdate(). ckucmd.c, 18 Sep 2020.
    3. Same thing for xbuf[] in a debug clause in doinput() (even though
       the warning was erroneous because it claimed the buffer size was 9
       when it was 24). ckuus4.c, 18 Sep 2020.
    4. Same thing for dbuf[] in function domydir(). ckuus6.c, 18 Sep 2020.
    5. Complaints about implicit definitions of tgetent(), tgetstr(),
       tputs(), and tgoto() in the curses-related routines fxdinit(),
       ck_termset(), ck_curpos(). [71]See notes below. I had the
       prototypes commented out because they caused problems on some
       platforms. Uncommenting causes disaster on Red Hat, NetBSD, etc. I
       had to add a clause to the linux target that looks in /etc/issue
       for "Ubuntu" or "Debian" and if found defines a special symbol,
       NEEDCURSESPROTOTYPES. makefile, 18 Sep 2020.
    6. getslot() needed a prototype. ckuusx, 18 Sep 2020.
    7. Within getslot() ftruncate() needed a cast to void. ckuusx, 18 Sep
       2020.
    8. The ages-old dilemma... what type is main()? Haven't had this
       complaint in decades. Replaced the #ifdef mess with something much
       simpler: if it's OS/2 or Windows, void; otherwise int, period.
       ckwart.c, 18 Sep 2020.
    9. Another sprintf() buffer issue corrected in snddir(). ckcfns.c, 18
       Sep 2020.
   10. Implicit declaration of openpty(). I never needed to declare it
       before. Ubuntu says I need to include <pty.h>. I added a new stanza
       to the Linux target to include <pty.h> if it exists. makefile, 18
       Sep 2020. (this should also eliminate the warning from pty_getpty()
       in ckupty.c)
   11. Commented out "system(ttname);", which raised an implicit
       declaration complaint. I can't even imagine what this statement was
       supposed to do. ttopen() in ckutio.c, 18 Sep 2020.
   12. Bogus complaint about how I was using the return value of link() in
       ttlock(). Recoded it. ckutio.c, 18 Sep 2020.
   13. Fixed a write() statement in zclose() and ftruncate() call in
       logwtmp() to not ignore their return values. ckufio.c, 18 Sep 2020.
   14. Added #include <sys/wait.h> within #ifdef __NetBSD__ .. #endif.
       (even though "man 2 wait" says "<wait.h>". ckufio.c, 19 Sep 2020.
   15. Added #include <util.h> to __NetBSD__ section of ckcdeb.h to fix
       implicit declaration warning for openpty() in ckupty.c and
       ckupty.c. 19 Sep 2020.
   16. Updated version to 9.0.305 Alpha.02 and updated EDITDATE and
       EDITNDATE. ckcmai.c, 19 Sep 2020.
   17. Increased yyyymmdd[] buffer length in cmcvtdate(): ckucmd.c, 19 Sep
       2020.
   18. Doubled the size of linebuf[] in domydir() because one sprintf()
       was putting some extra stuff in it. ckuus6.c, 19 Sep 2020.
   19. Added #ifdefs relating to openpty() to ckcdeb.h because openpty()
       is used in several modules. Tested only in Linux and NetBSD. 19 Sep
       2020.
   20. Casting to void did not suppress some "return value ignored"
       warnings -- write(), ftruncate() -- so I did "dummy = xxx();".
       getslot(), ckuusx.c, 19 Sep 2020.

   The result builds with no warnings or errors on NetBSD 9.0, Red Hat
   6.1, and Ubuntu 20.04.1. It also builds on Red Hat 6.1 with OpenSSL
   1.0.1 with one minor warning, which is OK for now because a lot of work
   on the OpenSSL support is on the agenda, most notably adaptation to
   OpenSSL 1.1, which is not compatible with 1.0 (which, as I recall, was
   supposed to have an API that would be stable for all eternity).

9.0.305 Alpha.01 24 Jul 2020

   Alpha test for an emergency C-Kermit release because GNU removed the
   symbol "__FILE_defined" (which Kermit uses on glibc systems for stdin
   buffer-peeking) from its stdio headers, thus breaking C-Kermit builds
   on all platforms that use glibc. C-Kermit was pulled from at least the
   Debian and Ubuntu distributions because of this, as opposed to (say)
   contacting me so I could address the problem; I found out about it from
   Debian and Ubuntu users who found that C-Kermit had silently
   disappeared from apt-get libraries. The small change added to this
   Alpha version allows C-Kermit to be built in the normal way ("make
   linux"). Operational testing is needed on all glibc systems, and then
   hopefully C-Kermit can be added back to the distributions again, and it
   will also have a lot of new features, improvements, and fixes since the
   last release, 9.0.302 in August 2011.

   Modules changed:  ckucmd.c, ckcmai.c.
   Date: 24 Jul 2020.
   Results:

   Platform No security OpenSSL Kerberos 5
   Red Hat Linux 6.1 / OpenSSL 1.0.1e OK (no warnings) OK (no warnings)
   (libs not installed)
   NetBSD 9.0 / OpenSSL 1.1.1d OK (no warnings) Fails (many warnings)
   (libs not installed)
   Ubuntu Linux 20.04.1 / OpenSSL 1.1.1f OK (many warnings) Fails (many
   warnings) (libs not installed)

   Note:  This version was placed back in the Debian distribution 17
   September 2020, but "will take some time before the package hits the
   Debian repositories because it needs to get manually approved, since it
   is a package reintroduction. Further updates will be much faster."

9.0.304 Dev.24 25 Apr 2020

   Under certain circumstances, the CHANGE command could cause a
   segmentation fault. Diagnosis: a variable (k) was incremented before it
   was initialized. - domydir(), ckuus6.c, 25 April 2020.

   The cmcvtdate() routine in ckucmd.c has been there since 2000 (C-Kermit
   7.0); its purpose is to parse free-format date-times (possibly
   including offests and/or timezones) and convert them into canonical
   local-timezone date-times. It's used by the DATE command and also by
   any other command than can parse date-times, and by the script language
   \fcvtdate() function. Among the many formats I thought it was supposed
   to understand is the one used in Apache weblogs: yyyy:mm:dd:hh:mm:ss.
   Apparently this has never worked. I changed the cmcvtdate() routine
   (and thus the DATE command and the \fcvtdate() function) to preprocess
   its argument and strip the colons from any dates in this format before
   proceeding. ckucmd.c, ckcmai.c, 25 Apr 2020.

9.0.304 Dev.23 4 Sep 2018 (announced 31 Jan 2020)

   It was annoying me that constructions like:

if \findex(not rated,\m(line)) {
    .line := \freplace(\m(line),not rated,sin ranking)
}

   failed with a message like "?<ERROR:MISSING_ARG:\findex()>". This has
   been the case forever. The standard advice was to work around in ways
   like this:

.x := \findex(not rated,\m(line))
if x .line := \freplace(\m(line),not rated, sin ranking)

   or:
if \findex(not\32rated,\m(line)) {
    .line := \freplace(\m(line),not rated, sin ranking)
}

   or:
.notrated = not rated
if \findex(\m(notrated),\m(line)) {
    .line := \freplace(\m(line),not rated, sin ranking)
}

   The IF command expects a keyword, a symbol, a number, or a "field", and
   therefore breaks on the first space. This is not a problem only with
   the IF command, nor only with the \findex() function; the same thing
   happens in any context where a "word" is expected and you include a
   \function() invocation that has spaces in its argument list. A
   universal fix was required at the very deepest level of the command
   parser: a state machine that recognizes function calls and prevents any
   blanks contained in their argument lists from triggering a premature
   word break. Now you can write function calls consistently in any
   context, no matter whether they contain spaces or not. The new code was
   added to gtword() and setatm() in ckucmd.c, enclosed in #ifdef
   FUNCTIONTEST..#endif, which is defined at the top of the file. 3-4
   September 2018. By the way, doing this revealed significant unnecessary
   duplication of effort between gtword() and setatm(), not worth fixing
   at this late date.

   CHANGE /COUNT:variablename always set the variable to 0 or 1, where it
   should have set it to the number of changes that it made. Diagnosis: it
   was sharing too much code with DIRECTORY /COUNT. Fixed in ckuus6.c, 8
   May 2017.

   Changed copyright year to 2018. ckcmai.c, 10 August 2018.

   CHANGE command: Got rid of the "Would create temp file" message, it
   overwhelms all the other feedback. ckuus6.c, 10 August 2018.

   \fpictureinfo(s[,&a]) apparently never has worked for getting the
   orientation of a JPG that comes straight out of a camera (or certain
   cameras). The reason I never noticed this is that I almost always run
   every image in a gallery through Photoshop first. Kermit only looks at
   the ImageLength (i.e. height) and ImageWidth Exif items, but in the
   camera's files they are the same for all orientations; the actual
   orientation is given by the Exif Orientation tag. Photoshop uses this
   to orient the picture properly when loading it, and sets the width and
   height correctly on writing it out.

   But there is nothing Kermit can do about this; even if I could figure
   out how to find the Orientation tag, what would I do with it?
   Eventually it dawned on me that the right place to handle this (to fix
   the problem when it occurs in the [72]Photogallery script) was on the
   Imagemagick command line. Simply adding -auto-orient did the trick.
   Photogallery 2.14, 21 Jul 2017. No changes to Kermit. But if there were
   an EXIF library for Unix...

   Fixed Lisp (ROUND -5.6666 2), it was losing the minus sign (result 5.67
   instead of -5.67). ckcklib.c, 19 July 2017.

   Added a new option to \freplace(): a 5th argument specifying "word
   mode", meaning that the target string will be replaced only if it's a
   "word", i.e. surrounded by whitespace or punctuation, etc, so as to
   avoid the case where the target word happens to also be a substring of
   other words. For example, changing the word "a" to the word "the"
   without changing all the other letter a's to "the". That would be
   simple enough but I also wanted to handle things like replacing "--" by
   &mdash; and "..." by &hellip; (for the html-to-text script). Added 4
   new routines -- isalphanum(string), cisalphanum(char),
   nonalphanum(string), cnonalphanum(string) -- which the \freplace() code
   uses to check the context of the target string. All of the new code is
   in #ifdef RPLWORDMODE..#endif, so can easily be deselected if
   necessary. ckuus[24].c, 5-7 Oct 2017.

   Simplified "hints" given after a GET command failed. ckuus5.c, 8 Oct
   2017.

   I used this C-Kermit version myself continuously for 17 months with a
   ton of heavy-duty scripting and a great deal of testing on NetBSD and
   Red Hat Linux, finally installed it on the FTP server and announced it.
   31 January 2020

9.0.304 Dev.22

   Fixed \fcode() to not throw errors if given an empty string (or nothing
   at all) as an argument. ckuus4.c, 22 Apr 2017.

   In the parser for DO command (macro invocation)... Prior to C-Kermit
   9.0.304 Dev.22, cmtxt() was called in all cases with zzstring. But this
   fouled up the identification of macro arguments when their values
   contained grouping characters such as doublequotes and braces. I
   changed the cmtxt() evaluation function pointer from zzstring to NULL,
   so we get a correct list of arguments, and then changed xwords (which
   was a big mess) to evaluate each one. I made a new evalmacroargument()
   routine for this, because xwords() needed to do this in about five
   places. ckuusr.c, ckuus5.c, 24 Apr 2017.

   Added a new routine newerrmsg(s); that prints an error message, and if
   it's from a command file, it shows the line number where the command
   started and the first part of the command (hence the need for
   snprintf(), to make the assembled message fit on one line). While
   working on xwords() I realized that the whole big mess was totally
   unnecessary now that I have the cksplit() C-Kermit library function, so
   I replaced the mess (or at least the "if (macro)" parts of it) with a
   single ckpslit() call. ckuusr.c, ckuus5.c, 25 Apr 2017.

   The resulting Kermit program had big problems running production
   scripts, so the next few edits are to aid in tracking them down.

   Added HAVE_SNPRINTF macro to ckcdeb.h so we can use snprintf() safely
   in conditionals. True for Linux, Mac OS X, and *BSD but others can be
   added easily. ckcdeb.h, 25 Apr 2017.

   When used for macro arguments, cksplit() was using '\' as a quote
   character, and thus variable names were not being recognized. I added a
   new cksplit() argument for this, and it works, but now cksplit doesn't
   split the string into words. That was because 'while (c = *ss++ &&
   !flag)' should have been 'while ((c = *ss++) && !flag)', now it is, all
   OK, except it didn't set the macro arguments. This goes back to when I
   decided to allow any number of macro args, instead of just 10, and
   created the macro argument vector \&_[]. For arguments 1-9, you also
   have to do addmac() for each argument, which I did. Really there should
   not be duplicate lists, but that's for another day. ckclib.c, 26 Apr
   2017.

   Fixed a bug in cksplit(), it wasn't filling the notsep[] string array,
   which could have affected CSV, TSV, or ALL include sets. ckclib.c, 26
   Apr 2017.

   newerrmsg() reveals that that the new "Definition is circular or too
   deep" errors are at the beginning of FOR and WHILE loops, but the loops
   still sort of work. This almost certainly is because FOR and WHILE are
   internally defined macros that have not been passed through command
   parser. Debugging continues...

   Fixed a bad debug() statement in the FOPEN (or FREAD?) code that was
   added in Dev.21 that could cause segfaults on certain platforms.
   ckuus7.c, 26 Apr 2017.

   The FOR, WHILE, IF, and SWITCH commands are defined in ckuus5.c like
   this:
/* WHILE macro */
char *whil_def[] = { "_assign _whi\\v(cmdlevel) {_getargs,",
":_..inc,\\%1,\\%2,goto _..inc,:_..bot,_putargs},",
"_define break goto _..bot, _define continue goto _..inc,",
"do _whi\\v(cmdlevel),_assign _whi\\v(cmdlevel)",
""};

   It seemed to me that the easiest way to fix the problem with the
   built-in macros would be parse them the same way they were parsed
   before. I moved the internal-macro check to a routine,
   isinternalmacro(). It works by checking the macro name. We have to
   stick to the discipline that internal macros have names starting with
   '_' followed by 3 unique characters. For WHILE the "master macro" is
   '_while', and the generated macros are _whi2, whi3, etc, where the
   number indicates the execution stack level (so we can have nested
   loops). ckuus5.c, ckuusr.c, 27 Apr 2017.

   Then in ckuusr.c where the cmtxt() call was changed to not use
   zzstring, put the zzstring call back if it's an internal macro, in
   theory undoing the original change to dodo() but only for internal
   macros. After some serious juggling of the quoting levels in the
   internal WHILE macro definition, it worked. At least for my test
   script, and for the HTML script. ckuus5.c, ckuusr.c, 27 Apr 2017.

   Now to fix the other internal macro definitions... I fixed foz_def (the
   macro to use when the loop variable is a macro rather than a \%x
   variable), now it works too. ckuus5.c, 27 Apr 2017.

   A problem with FOR was noted where the loop variable disappears inside
   the loop: "for \%i 99 99 1 { echo [\%i] }" printed "[]" instead of
   "[99]". Fixed by adjusting the quoting in for_def. ckuus5.c, 28 Apr
   2017.

   The IF command (also implemented as an internal macro) was adjusted the
   same way. ckuus5.c, 28 Apr 2017.

   The next problem comes up when running the text-to-html script on this
   update notes file: it gets errors like
   "?<ERROR:MISSING_ARG:\farraylook()>". This problem was not in Kermit
   but in the script: \m(line) was being passed as an argument to a macro,
   and the line contained the string "\farraylook()". The argument is seen
   as \%1 from the macro's point of view and therefore evaluated
   recursively. The solution is to refer to this argument as
   \fcontents(\%1). No wonder the Kermit programming never caught on! I
   forgot about this, even though it was standard advice for (for example)
   passing Windows pathnames as arguments to macros. Anyway, with this
   change the html script runs without complaint and productes the correct
   result. April 28, 2017.

   But running other long, complex production scripts, a new problem came
   up: when a macro passes one (or more) of its arguments to another
   macro, the other macro gets an empty value for it. dodo():

     * Makes a new macro level (maclvl) and a new command level (cmdlvl).
     * Initializes the new cmdlvl stack frame.
     * Initializes the return value for this level to NULL.
     * Deletes any old macro arguments (\%1-\%9) at this level.
     * Calls xwords() to get the new argument list.

   Suppose macro A has been called with an argument \%1, and then invokes
   macro B with that same argument. Macro B gets "\%1" rather than the
   value of \%1, but since it is at a new level, \%1 does not have a
   value. Previously, these variables were evaluated in docmd() case XXDO,
   before dodo() was called, therefore they received the values from level
   where the macro was invoked. Now they are evaluated after dodo() starts
   a new macro level, but in the new level zzstring() doesn't find any
   definitions for the \%1-9 variables. The solution is not exactly
   elegant:

maclvl--;
evalmacroarg(&p);
maclvl++;

   but it's the only safe way to do it, because it is only in this place
   that we know that (say) \%1 is on the macro invocation's argument list
   and not in some other context. ckuus5.c, 29 Apr 2017.

   In running the suite of script-language torture tests, most of them
   (the ones published on the website) give the same results in previous
   and new C-Kermit. An incompatibility was noted in the 'demo' script:

ask \%x { Type 3 numbers separated by spaces or an empty line to quit:  }
if not def \%x break
smallest \%x

   In old Kermit, the 'smallest' macro saw three arguments; the new Kermit
   sees only one. I think the old behavior was too much magic; the new
   behavior is proper. From now on, if you want a macro to receive 3
   arguments, you'll have to call it with three arguments. Or recode the
   macro to \fsplit() any compound arguments.

   The S-Expression torture test gets errors now that it didn't before,
   but the errors are correct: e.g.

?Not defined - "c"
?sexp[37]: "(++ a 1 b 1 c 1 d)": Syntax error'

?Too few operands - "/ 2"
?sexp[110]: "(/ 2) ----} - c a))  t2 t1)..."

?Too few operands - "++"
?sexp[189]: "(++)  ate result) f (objective \%1) ..."

   Added FOPEN /STDOUT and FOPEN /STDERR. This allows a Kermit script to
   be fully pipeable. A minor wrinkle here was to not actually close any
   of these if the script contained an FCLOSE for them. ckcker.h,
   ckuus[27].c, 30 Apr 2017.

   The SWITCH command internal macro definition needed another adjustment.
   ckuus5.c, 30 Apr 2017.

9.0.304 Dev.21

   April 19, 2017: Coming back to the code after a year of not touching
   it. If there are still any C-Kermit users out there, they don't seem to
   have any issues. Nevertheless, I do believe there are problems with the
   OpenSSL support. But I'm really not qualified or equipped to deal with
   them.

   It was bothering me that in Unix, you can't pipe a command or shell
   script to the kind of Kermit script that is designed to read from a
   file whose name specified on the command line; that is, that has an
   FOPEN /READ command in it. If FOPEN had a way to "open" standard input,
   then if no filename was given on the command line, FOPEN could
   accommodate:

if defined \%1 fopen /read \%c \%1
else fopen /stdin \%c
if fail ...

   So using this code, you could run a script "averages" in either of two
   ways:

average list               # The 'list' file contains a list of numbers
someprogram | average      # 'someprogram' outputs a list of numbers

   Code was added to support this. To see the C-Kermit changes search for
   "stdin" (case-independent) in ckuus7.c. It's not super-elegant,
   codewise, but I didn't want to totally redesign the data structures.
   Nothing was done for stdout or stderr, but they could follow the same
   path if there's ever a need. UNIX only for now, but could probably be
   adapted to VMS or Windows without much trouble. ckcker.h, ckuus2.c,
   ckuus7.c, 19 Apr 2017.

   Added switches for GETC... GETC /TIMEOUT:sec (so as not to have to SET
   ASK-TIMER before and after), /QUIET (so as not to see "?Timed out"
   message), and GETC /CHECK to see if anything is waiting to be read in
   the standard input stream (what it actually does is checks to see if
   stdin is a terminal; normally it won't have anything waiting if it is,
   and if it isn't, that means stdin is being piped to C-Kermit (or, more
   usefully, a C-Kermit script). This way a script can be written that can
   read its input from a disk file whose name is given on the command
   line, or have its input piped from another program, and still be able
   to give a usage message if no filename was given and nothing was piped.
   ckuus6.c, ckuus2.c, 21 Apr 2017.

   Here's how to write a script that reads from a file if a filename was
   given or, if not, reads from stdin:
  if defined \%1 {                # filename given on command line
      fopen /read \%c \%1
      if fail exit 1
  } else {                        # No command-line argument given
      fopen /stdin \%c
      if fail exit 1              # Open failed (shouldn't happen)
      getc /check                 # Check if stdin is redirected.
      if fail exit 1 \m(usage)    # If not exit with usage message.
  }

   For this purpose, it turns out that IF NOT BACKGROUND works just as
   well as GETC /CHECK followed by IF FAIL. IF BACKGROUND is true not only
   if the program is running in the background, but also if its standard
   input is a pipe.

   Updated makefile dates. makefile, 27 Apr 2016.

   Updated Dev version and dates, plus added comments about how to do
   this. ckcmai.c, 27 Apr 2016.

LISP subsystem changes in April 2017

   Fixed the LISP ECHO command to always do unquoting itself, so UNQUOTE
   is only necessary for things like creating a string valued variable in
   Lisp that can be referenced in the Kermit domain:

(setq a (unquote '(This is a Lisp string constant)))
show macro a
This is a Lisp string constant

   We still need the inverse of Unquote, say REQUOTE or DOQUOTE or
   ADDQUOTE or IMPORT, whose argument is a variable containing a Kermit
   string, which returns the equivalent Lisp string. Like QUOTE, but
   evaluates the operand first.

   The sexp torture test still runs correctly.

   Meanwhile I think there is a lot of redundant or unused code in
   dosexp().

   Explanation for docs:

   Everything in an S-Expression is an operator, a variable name, a
   numerical constant, or a string constant. Strings in Lisp are
   represented as '(contents of string). The ECHO operator understands
   these and outputs them without the syntax, but it also understands
   regular Kermit strings, so you can use Kermit variables

   Kermit variables that start with backslash like \%a, \v(date), etc,
   don't look like Lisp variables so they have to be quoted: (echo '(\%a)
   '(\v(date)))

   Now do we need other string functions like CAR, CADDR, and CONCAT?

   (End of April 27, 2016, notes)
   ....................

   Added UNQUOTE command to deal with Lisp string constants like:

'(this is a string)

   so they can be echoed without the syntax, or exported into Kermit land.
   Also fixed bug where dosexp() could return a previous value if the
   current one was empty. ckuus3.c, 26 Apr 2016.

   There was no way to print stuff within S-Expression code, so I added an
   ECHO command that takes any number of arguments to be printed in
   series, but unlike the mainline ECHO command, this one evaluates each
   element in its argument list as an S-expression, or if it is not an
   S-Expression, then as a macro. Literal strings and Kermit backslash
   items (variables, function calls) must be entered as Lisp quoted
   strings:

(echo '(\fupper(abcdefg)))

   which prints "ABCDEFG".

   This example shows how Kermit code can be transformed to all Lisp:

define a three plus four is
  define b 3
  define c 4
  increment b c
  echo \m(a) \m(b)

   Results in "three plus four is 7". The more-compact all-Lisp version
   gives the same result:

(setq b 3 c 4)
  (echo '(three plus four is) (+ b c))

   Thus the main utility of the S-expression ECHO directive is to be able
   to print macro named variables (i.e. variables whose names don't start
   with backslash) without enclosing them in \m(). Or to put it another
   way, to be able to write LISP code that prints results in regular Lisp
   syntax without having to leave the Lisp environment. ckuus3.c, 25 Apr
   2015.

   \fcvtdate(string,code)... code is a number or a variable with an
   integer value. Function args that must be numeric can be given as macro
   names without the \m(xxx) notation, i.e. just xxx, but that didn't work
   with \fcvtcate():

for i 1 6 1 { echo \m(i). \fcvtdate(,i) }

   Now it does. ckuus4.c, 23 Mar 2016.

   Fixed HELP SEXP to also show ROUND with optional second argument.
   ckuus2.c, 24 Apr 2016.

Dev.20

   I got a report that the photogallery script could not create files in
   Mac OS X. Sure enough, C-Kermit 9.0.304 got an error every time it
   tried to create a file. This happened in both zchko() ("check if file
   can be created") and in zopeno() ("open file for output"), whichever
   was called first, even though the code in these routines had not
   changed, probably in decades. I couldn't take a debug log either
   because that required opening a file. The user who reported the problem
   discovered that if she created the desired file first outside of
   Kermit, then Kermit could open it for output. It seems that ever since
   1985, I have been calling open() with just O_WRONLY. Evidently that's
   not good enough any more in recent Mac OS X releases; experimentation
   shows I have to use O_WRONLY|O_CREAT, but then I also have to put
   perms, so I put 0600. I made this change in both zchko() and zopeno().
   Tests OK in Mac OS X 10.10.5, NetBSD 6.1.5, Solaris 9, and Linux
   RHEL6.6. ckufio.c, 16 Feb 2016.

Dev.19

   As noted, Dev.17 dumped core immediately upon startup on certain 64-bit
   platforms such as Ubuntu 15.04 and Mac OS X 10.11. Since I don't have
   access to these platforms I asked Mark Sapiro to look at the changes I
   made and try to narrow them down. He found that these did the trick:

--- cku304.17/ckucmd.h  2016-02-03 11:28:00.000000000 -0800
+++ cku304.18x/ckucmd.h 2016-02-04 17:54:33.872465535 -0800
@@ -103,7 +103,7 @@
#define HLPBL  100                     /* Help string buffer length */
#ifdef BIGBUFOK
#ifdef CK_64BIT

-#define ATMBL 163808                  /* Command atom buffer length */
+#define ATMBL 20470                   /* Command atom buffer length */
#else
#define ATMBL 10238                    /* Command atom buffer length */
#endif /* CK_64BIT */

@@ -122,7 +122,7 @@
#else
#ifdef BIGBUFOK
#ifdef CK_64BIT

-#define CMDBL 8388608
+#define CMDBL 65500
#else
#define CMDBL 32763
#endif /* CK_64BIT */

   So I put back my changes from to ckcdeb.h, ckcker.h, ckucmd.h, and
   ckuusr.h, from Feb 3, and then made the adjustments just above. I
   suspect the segfaults occurred when a bunch of these very large buffers
   were malloc'd in cmsetup() upon program startup. Time will tell if the
   new values are safe. ckucmd.c, 5 Feb 2016.

   Updated locale documentation on the website in locale.html, 5 Feb 2016.

   Added new format code 6 to \fcvtdate() for "dd fullmonthname yyyy
   hh:mm:ss". This prints the monthname from the Locale, or if there is no
   Locale or it is disabled, the full monthname in English. ckucmd.c, 5
   Feb 2016.

   In doing this, I noticed that if I included any command that referenced
   the locale in a kerbang script or any other script invoked on the
   command line, that the locale wasn't used. I moved the initialization
   of the locale a bit higher up in the program start code. ckcmai.c, 5
   Feb 2016.

   Added locale support to \fcvtdate() so month name comes out in the
   desired language in formats where an "English month name" was
   previously returned. Works OK in Red Hat EL6.6, but localized dates
   aren't supported on the other platforms I have access to (Solaris 9,
   various NetBSD versions). As a start, I always use 3-letter short month
   abbreviations, even though some countries might use longer ones. If
   anybody cares about this, they will let me know. But this way, all date
   formats that have textual month names come out in the same format and
   dates in the same format are always the same length. ckucmd.c, 5 Feb
   2016.

Dev.18

   Fixed four debug() statements that had a string as the final parameter
   instead of a number, noticed by gcc on NetBSD 7. ckuusx.c, ckudia.c, 4
   Feb 2016.

   Mark Sapiro says Dev.17 segfaults immediately on startup on Ubuntu
   15.04. Asked him for a debug log. Meanwhile I checked the tarball,
   rebuilt from it, all OK on 64-bit Linux RHEL6 and on 32-bit NetBSD
   6.1.5. Built on NebBSD 7.0 also, no problem there except a few new
   warnings. Backed off the 64-bit size changes. ckcdeb.h, ckcker.h,
   ckucmd.h, ckuusr.h, 4 Feb 2016.

Dev.17

   Added missing "help xmessage" text. ckuus2.c, 3 Feb 2016.

   The command "date 29-feb-1996 +1year" failed with "?Base day out of
   range". Fixed in ckucmd.c, 3 Feb 2016.

   Removed misleading display of Z_MAXCHAN from SHOW FEATURES because in
   Unix we don't use this symbol; we get the real maximum number of open
   files from sysconf(). ckuus5.c, 3 Feb 2016.

   Changed definitions of sizes of things (command buffers, packet
   buffers, etc) to be much bigger on 64-bit architectures. This will
   allow bigger script programs, bigger packet buffers (and thus
   conceivably faster file transfers), more macros, more variables, longer
   values of variables, etc. The bigger sizes are dependent on the symbol
   CK_64BIT, which is set in ckcdeb.h based on what it can figure out from
   compiler builtins, header files, etc, but can also be set on the CC
   command line in case ckcdeb.h doesn't pick it up. ckcdeb.h, ckcker.h,
   ckucmd.h, ckuusr.h, 3 Feb 2016.

   Added __x86_64 to the symbols looked for when defining CK_64BIT.
   ckcdeb.h, 3 Feb 2016.

   Added __x86_64 to the symbols looked for and displayed by SHOW
   FEATURES. ckuus5.c, 3 Feb 2016.

   Mark Sapiro also noticed that the "localarray" stresstest revealed that
   if an array (say \%a[]) was declared as local in a macro, but the same
   array was NOT declared at any higher level, then the array persisted
   even after the macro returned, instead of disappearing as it should.
   Fixed in popclvl(): ckuus5.c, 3 Feb 2016.

   Mark Sapiro reported C-Kermit crashing on some platforms but not others
   when evaluating any rounding operation in an S-expression, e.g. (round
   1.75). My mistake, I had sprintf() writing into a buffer that was too
   short. I know I should use snprintf() but it's not portable and it
   would be a big deal to enumerate all the platforms where it's available
   and where it's not and tailor the code accordingly, so I just made the
   buffer (more than) big enough, barring any misbehaving printf() format
   interpreters. ckround(): ckclib.c, 3 Feb 2016.

   Used STRDIRSEP in the CHANGE code to keep it portable, in case C-Kermit
   is ever built on any non-Unix platform again (WARNING, VMS will still
   require some special code). ckuus6.c, 2 Feb 2016

   We have always had DIRSEP and ISDIRSEP macros for referring to
   directory separators in the code, e.g. '/' for Unix, ':' for AOS/VS,
   '>' for VOS, '\' for OS-9, etc, but we needed a string version, so I
   added STRDIRSEP analogs for each DIRSEP (like "/" for '/') so we could
   use them as arguments to ckindex(), ckstrncat(), etc. ckcdeb.h, 2 Feb
   2016.

   In adding the /BACKUP switch, something caused a core dump when using
   /MODTIME:PRESERVE, a bad value in the "generic permissions" field of
   the zsattr struct when going to copy the modtime and perms from the
   original file to the backup file. It's because I wasn't initializing
   all the struct members. I changed zsattr() to defend itself against
   out-range-values, clarified the calling convenstions for zstime() in
   the opening comments (if you are not setting attribute blah, then set
   blah.len = 0 in the argument struct), and I fixed the struct
   initializations in the calling code. ckuus6.c, ckufio.c, 2 Feb 2016.

   Added a /BACKUP:directory switch for CHANGE. ckuus6.c, 1 Feb 2016.

   Added a /DESTINATION:directory switch for CHANGE. Some problems I had
   doing this revealed an error in domydir()... For reasons too hard to
   explain the DIRECTORY command sets a global flag "diractive" to let the
   command parsing routine cmifi2() know that a DIRECTORY command is in
   progress, and therefore to do some special things in that case when a
   wildcard expansion includes directory names. Later on I added TOUCH and
   CHANGE commands to domydir(), because writing separate routines would
   have meant duplicating tons of code. BUT... The "diractive" flag should
   NOT be set when the command is TOUCH or CHANGE. Once that was fixed,
   the rest was pretty straightforward. ckuus6.c, 1 Feb 2016.

   I discovered that the CHANGE command didn't work on Linux. This opened
   a whole big can of worms, read on...

   CHANGE command failed on platforms like Linux where fputs() did not
   return 0 on success. Fixed in ckuus6.c, 29 Jan 2016.

   But after this fix it still didn't work if I did not have en
   environment variable defined that said what directory to use for
   temporary files because the \v(tmpdir) variable was not falling back
   correctly. In Unix, first it tried the environment variables CK_TMP,
   TMPDIR, TEMP, and TMP, in that order, and if nothing turned up it tried
   /tmp/. Then if the resulting value doesn't end in a directory
   separator, one is tacked on. There were a couple mistakes in the code
   causing the /tmp/ part to be skipped, and tacking '/' onto the null
   string, thus setting the temporary directory to be the root directory,
   resulting in big trouble when writing temporary files, e.g. in the FTP
   GET command, the CHANGE command, who knows what else. Fixed in
   ckuus4.c, 29 Jan 2016.

   Another problem with this was that the temporary directory might be
   referenced before it was defined, e.g. in an FTP GET command. Remedied
   by "invoking" \v(tmpdir) before any commands are processed. ckcmai.c,
   29 Jan 2016.

   And Yet Another Problem was that the SET TEMP-DIRECTORY command simply
   did not work. Plus it didn't store its argument as a full pathname, so
   it would not work after the user CD'd to someplace else. ckuus3.c, 29
   Jan 2016.

   A related problem was that IF WRITEABLE didn't work when given a
   directory name. Fixed in ckufio.c, 29 Jan 2016.

   Another problem was that there was no SHOW TEMP-DIRECTORY command.
   Every SET should have a SHOW. Fixed in ckuusr.h, ckuusr.c, 29 Jan 2016.

   Updated HELP SET TEMP-DIRECTORY text. ckuus2.c, 29 Jan 2016.

   Added TMP-DIRECTORY as an invisible synonym for TEMP-DIRECTORY in the
   SET and SHOW commands. ckuusr.c, 29 Jan 2016.

Dev.16

   Updated copyright year to 2016. ckcmai.c, 18 Jan 2016.

   Made a new "linux" target for the makefile. Kept the previous one
   available as "linux-2015". The feature tests in the old one looked for
   libraries in specific places, like "if test -f
   /usr/lib64/libncurses.so.5" which is stupid because there is an endless
   number of places where Linux packagers will dream up to put them,
   especially for multiarchitecture distributions. Well, who really knows
   where the libraries are, and what the library search path is? ld,
   right? So now instead of looking in 20 different places for (say)
   libncurses under several different names, we just ask ld if it can find
   it and if so -- and if we also can identify the corresponding header
   file (if any) -- then we set the appropriate HAVE_BLAH feature flags.
   makefile, 18 Jan 2016.

   Mark Sapiro noticed that "OK" is no longer a valid IF condition (it was
   a synonym for SUCCESS), which is true; I removed it years ago because
   of some conflict but didn't make a note of it, can't remember the
   reason, but IF OK still showed up in HELP IF. Removed it in ckuus2.c,
   and put a new version of the iftest script in the script library. 31
   Dec 2015.

Dev.15

   Patches from Bernard Spil for LibreSSL: "Currently Kermit fails to
   build when openssl libraries have been built without SSLv3 are used
   (configure --no-ssl2 --nossl3). This has surfaced when building with
   the latest LibreSSL 2.3. In addition, there are issues with LibreSSL as
   it does not support SSL compression nor perl EGD as entropy source.
   Attached patches address all these issues. These can be improved upon
   by using only SSLv23_ methods or even TLS_ methods and setting
   SSL_CTX_set_options(ctx, SSL_OP_NO_SSL2 | SSL_OP_NO_SSL3) but I've
   tried to make the patches minimally intrusive. OpenSSL 1.1.0 will
   deprecate SSLv23_ methods and introduces compatible TLS_ methods."
   ckssl.h, ck_ssl.h, ck_ssl.c, ckcftp.c, ckupty.c. Built OK on NetBSD
   6.1.5 with OpenSSL 1.0.1e and Linux RHEL6.6 with 1.0.1k, and also on
   both without SSL selected, but with some warnings; in functions
   'tls_is_anon' and 'tls_is_krb5': "assignment discards qualifiers from
   pointer target type".

   Updated dates and Dev number, ckuus5.c, ckcmai.c.

   Trying to build C-Kermit on Red Hat RHEL6 it failed at link time
   because it couldn't find libncurses. It was really hard to track this
   one down because all the symptoms were totally misleading. The real
   problem was that ncurses.h was not installed on the system, and the
   elaborate checking in the linux targe of the makefile didn't allow for
   the case when the libraries were installed but the header file not.
   After fixing the makefile it compiles and links correctly without
   curses support. Also fixed a large number rule lines that started with
   spaces in stead of Tab. makefile, 17 Dec 2015.

  NOTE FOR DOCS: If C-Kermit builds silently but the result has no curses
  support, it means that lib[n]ncurses is missing OR [n]curses.h is missing.
  There should be a way to issue a message from the makefile but I couldn't
  find it (echo, @echo, etc, none of them worked).

Dev.14

   Two closing braces were missing in ck_ssl.c at line 2207, which
   prevented Dev.13 from being built with OpenSSL support. 10 Oct 2015.

Dev.13

   Compiles, links, and runs OK with "make netbsd+ssl" except for these
   warnings:

ck_ssl.c: In function 'ssl_display_connect_details':
ck_ssl.c:1089:12: warning: assignment discards qualifiers from pointer target ty
pe
ck_ssl.c: In function 'tls_is_anon':
ck_ssl.c:3139:12: warning: assignment discards qualifiers from pointer target ty
pe
ck_ssl.c: In function 'tls_is_krb5':
ck_ssl.c:3189:12: warning: assignment discards qualifiers from pointer target ty
pe


   Resulting binary connects with TLS 1.0 to https://www.google.com.

   From Jake Thompson: "ckcftp.c is currently set up to allow only SSL 3.0
   by default when using AUTH SSL/AUTH TLS, and no later versions
   (SSLv3_client_method). After the POODLE vulnerability, most sites have
   disabled SSL 3.0, allowing only TLS 1.0 or later. The attached patch
   changes ckcftp.c to allow TLS 1.0 and later only by default, adding a
   new bug option use-ssl-v3 in order to downgrade to SSL 3.0 if needed.
   ck_ssl.c looks like it may need similar changes; I haven't looked
   extensively." I applied Jake's patch to ckcftp.c, and the analogous
   patches to ssl_tn_init() and ssl_http_init() in ck_ssl.c, with improved
   structure and debug logging. 5 Feb 2015.

   Apropos of the previous item, SHOW FUNCTIONS is not very useful. It
   gives a list of all the functions, period. But if I wanted to find only
   the functions that have to do with PIDs, it would be nice to be able to
   include a string to match the function names, as in "show function
   pid". Other examples include "show func info", "sho func code", "sho
   fun date", etc. This was added doshow() ckuus5.c, with a special
   function code parameter value added to kwdhelp() in ckucmd.c and new
   HELP FUNCTION text in ckuus2.c. It's not really pattern matching, just
   a substring. Anything more ambitious would have required a rewrite of
   kwdhelp(). 5 Feb 2015.

   Changed \fgetpidinfo() to \fpidinfo() to be easier to find, but left
   the original name as an invisible synonym. ckuusr.c, 5 Feb 2015.

   Edward Berner noticed that K95 built with Open Watcom was crashing
   because of "inconsistent extern declarations of vmode". vmode is
   declared BYTE vmode = VCMD; in ckoco2.c and referenced as extern BYTE
   in all but two cko*.c modules, but as extern int in all cku*.c modules
   except cko[tf]io.c. BYTE is not a known type to mainline C-Kermit code.
   However, all references to vmode in mainline code are within #ifdef
   OS2. Fixed in ckofio.c, ckotio.c, ckuus3.c, ckuus6.c, ckuus7.c,
   ckuusx.c, 5 Feb 2015.

   Edward also reported a similar problem with marginbot, but in my
   sources all declarations are consistent (int). But he is working with
   2003 source code, probably it's fixed.

   SET LOGIN USER xxx did not evaluate xxx if it was a variable. If there
   was ever a reason for this I can't recall it. Fixed in ckuus3.c, 5 Feb
   2015.

Dev.12

   Fixed the previous fix. ckufio.c 9.0.220, 12 Jan 2015.

   Updated copyright year to 2015. ckcmai.c, 11 Jan 2015.

   On QNX 4.25 an FTP GET command always failed with a segmentation fault.
   In fact, this would happen in any Unix version of C-Kermit that has
   NOUUCP defined, such as Mac OS X. The code in the #ifdef NOUUCP section
   of zchko() was wrong, clobbering the variable (x) that held the length
   of filename string. I fixed zchko to not do that. ckufio.c 9.0.219, 11
   Jan 2015.

Dev.11

   I received reports from both Alan Jones and Harold Baldwin around the
   same time that REMOTE commands were getting "?Not confirmed" parse
   errors in C-Kermit 9.0.302 and later. Incredibly, this was broken long
   ago in remcfm(); see the comment there in ckuus7.c about line 7177. The
   problem was that I commented out the test for an empty cmtxt() result
   string. Apparently at least 10 years have passed without anybody
   noticing and reporting this (it works right in K95 2.1.3 from 2003).
   Fixed in ckuus7.c, 3 Nov 2014.

   Updated HELP SET FILE text to mention that SET FILE COLLISION OVERWRITE
   doesn't work for a server unless it has also been told to ENABLE
   DELETE. ckuus2.c, 3 Nov 2014.

   The photogallery script documentation contains a hint that didn't work,
   namely that to create a list of the names of all the non-thumbnail,
   non-resized original image files, use:

directory /brief /except:*-[tr].jpg /output:somefile *.jpg

   This did not work; the /EXCEPT switch was ignored whenever the /BRIEF
   switch was included in a DIRECTORY command. Fixed in domydir() by
   moving two lines of code to where they always should have been.
   ckuus6.c, 3 Nov 2014.

Dev.10

   From Mark Wooding: Fix inconsistent declarations of a couple variables
   across modules; he actually reported a bunch of them but all the
   serious ones (int vs long or off_t) had been fixed in 2005 with the
   introduction of CK_OFF_T, and the only two that needed fixing were char
   * vs char [] (prevcmd and cmdfil). ckucmd.c, ckuusy.c, 23 Feb 2014.

   From Mark Wooding: supply default "(none)" value for \v(dialmsg).
   ckuus4.c, 23 Feb 2014.

   From Mark Wooding: add #define _XOPEN_SOURCE 500, #include <stdlib.h>
   in the PTY module, "Needed along with -DHAVE_PTMX for working ptys".
   Also fixed a debug() statement that had a string argument that should
   have been an int. ckupty.c, 23 Feb 2014.

   From Ian Beckwith, updates to the Debian Linux MULTIARCH support. "I've
   checked through the patched makefile, every library is checked in
   /usr/lib/$(MULTIARCH)/, except for libdes425, which isn't in debian."
   These changes are presently in Debian testing for amd64, armel, armhf,
   i386, kfreebsd-amd64, kfreebsd-i386, mips, mipsel, powerpc, s390x,
   sparc. makefile, 23 Feb 2014.

   Documentation for MULTIARCH:
   [73]https://wiki.debian.org/Multiarch/Implementation
   [74]https://wiki.ubuntu.com/MultiarchSpec
   [75]https://wiki.debian.org/Multiarch/HOWTO

   From my to-do list.... I noticed a while back that \fsplit(s,&a,,TSV)
   could mess up if the data fields contained grouping characters like
   parens, quotes, brackets, or braces. \fsplit() and \fword() are handled
   by cksplit(), which is designed to allow grouping, nesting, quoting,
   recursion, and so on (for parsing such things as complex LISP
   S-expressions and Comma-separated lists full of quoting) and I guess
   some of that code was being executed for TSVs. Rather than mess with
   the existing code and possibly break something else, I added a chunk of
   new code at the beginning of the byte loop in cksplit() to handle TSVs,
   which are extremely simple, and so the new code is too. And also way
   more efficient. Seems to work right, and other things like LISP
   programs still work. ckclib.c, 31 Jan 2014.

Dev.09

   Updated version number and date and copyright date. ckcmai.c and many
   other modules. 20 January 2014.

   Fixed core dump that happened only in Solaris (as far as I know) with
   "ftp open kermitproject.org" (which should have been
   "ftp.kermitproject.org"). The problem was that perror() was being
   called with a pointer to an empty string, which should be OK but
   apparently is not in Solaris. ckcftp.c, 20 January 2014.

   Various minor touch-ups to HELP, NEWS, VERSION text. ckuus[r2].c, 20
   Jan 2014.

   Added CHECK LOCALE. ckuus3.c, 20 Jan 2014.

   Fixed an aggregrate array initialization (not legal in non-ANSI).
   ckuus4.c, 20 Jan 2014.

   From David Goodwin: Remove all references to K95 registration and
   time-limited demo versions, and fix a couple minor compilation problems
   for the Windows version. ckcmai.c, ckcpro.w, ckucmd.c, ckuus[34rx].c,
   ckuusr.h, 20 Jan 2014.

   Corrected HELP SHIFT text, which previously said it affected only
   arguments 1..9, but really affects all arguments, no matter how many.
   ckuus2.c, 17 Dec 2013.

   Got rid of the "ok" keyword as an IF condition. OK was an undocumented
   and invisible synonym for SUCCESS, but this has bitten me too many
   times, when I create a variable named OK and use it as a "lazy IF
   condition" as in:
.ok = 0
if match \&a[i] img_[0-9][0-9][0-9][0-9].jpg .ok = 1
else if match \&a[i] img_[0-9][0-9][0-9][0-9][0-9].jpg .ok = 1
else if match \&a[i] dscf[0-9][0-9][0-9][0-9].jpg .ok = 1
else if match \&a[i] scan[0-9][0-9][0-9][0-9].jpg .ok = 1
if not ok exit 1 "\&a[i]: Not a recognized image file name"

   ckuus6.c, 17 Dec 2013.

   For Unix only, changed default prompt to show "~/" instead of the full
   home path, which these days can get ridiculously long. So now, for
   example, "(/hmt/sirius1/prv0/kd/fdc/) C-Kermit>" becomes "(~/)
   C-Kermit>". If I'm cd'd to the "src" directory of my home directory,
   it's "(~/src/) C-Kermit>". If my current directory is not in my home
   tree, its full path is shown as before. ckuus5.c (definition of
   ckprompt), 17 Dec 2013.

   Reported by Christoph Sievers... the following sequence:

SET FTP AUTOENCRYPTION ON
SET FTP AUTHTYPE TLS
SET AUTH TLS VERBOSE ON
SET AUTH TLS VERIFY NO
ftp open 127.0.0.1 12345 /USER:fu /PASSWORD:bar /NOINIT

   is supposed to allow a secure FTP connection to proceed without the
   question:

Warning: Server didn't provide a certificate
Continue? (Y/N)

   but the question was coming out anyway. Jeff noticed that the FTP/SSL
   code was missing an IF clause that was present in the TELNET/SSL code.
   Fixed in ckcftp.c, 17 Dec 2013.

   The TOUCH command was dumping core because of a clever optimization I
   put in the code at some point, probably not too long ago or I would
   have noticed it. Fixed the problem by removing the optimization.
   ckuus6.c, 17 Dec 2013.

Dev.08

   Branding of C-Kermit for Windows... I removed the special version
   numbering for C-Kermit for Windows (nee K95) so now it should show the
   regular C-Kermit version herald. Changed \v(program) to always be
   "C-Kermit", not "K-95", "K/2", etc. Changed default prompt for Windows
   and OS/2 to [dir] C-Kermit>. Added "IF WINDOWS" and made "IF K-95" an
   invisible synonym for it. Performed a rather massive edit on the help
   text module to remove references to Kermit 95. Builds OK in Unix but so
   far I don't have a way to test it in Windows. ckcmai.c, ckuus2.c,
   ckuus4.c, ckuus5.c, ckuus6.c, 6 Dec 2013.

   DIR /ARRAY:&a *.jpg doesn't work right if only one file matches: it
   creates the array with dimension 1, but element 1 is empty. But it
   works OK if two or more files match. This is because the code to load
   the array is executed only if we sort the result, a step which we
   cleverly skip if there is only one file in the listing. For that
   matter, DIR /NOSORT /ARRAY:&a *.* doesn't work at all, no matter how
   many files match. It turns out a lot of code is in the sorting block
   that doesn't actually have anything to do with sorting. So I changed
   domydir() so it the "xsort" flag (which selects this code) is always
   on, and added a new flag that says whether we actually call the sort
   routine, which was safer than reorganizing a ton of code. ckuus6.c, 6
   Dec 2013.

   Changed ckstrcmp(), which is used by the DIRECTORY command, the ARRAY
   /SORT command, the \fstrcmp() function, and who knows what else (this
   function is called from 261 different places in C-Kermit), to use the
   collating sequence of the current locale, which works as long as the
   character set is single-byte (e.g. ISO-8859-1 or KOI8). The way I did
   it is not pretty, but there is no standard locale-aware string
   comparison function that has the options that ckstrcmp() has (and
   uses), and as far as I can tell there is no standard way to compare two
   characters according to the locale, only two NUL-terminated strings. So
   I turn each character into a string and compare them with strcoll(). I
   can't just compare the strings directly because (a) strcoll() doesn't
   allow the comparison of pieces of strings and (b) there is no
   case-independent version of strcoll(). The new code is within #ifdef
   HAVE_LOCALE..#endif, but some adjustments might be needed if strcoll()
   (circa 1989) is not found everywhere that locales are found. Anyway,
   now non-ASCII filenames and arrays (except in multibyte character sets
   like UTF8) will sort correctly if the locale has the required collating
   sequence; otherwise they come out as before. ckclib.c, 6 Dec 2013.

   In the same vein... Lazy IF Conditions, in which a variable name can be
   used as an IF condition as long as it evaluates to a number (0 being
   false, nonzero being true)... The error message given when the variable
   (or other random string) did not have a numeric value, or any value at
   all, was less than informative. Now it prints the variable name, which
   is a good trick because it had already been wiped out in the act of
   trying to evaluate it. ckuus6.c, 6 Dec 2013.

   Another fundamental change to the parser. Script writers might have
   noticed that an innocent-looking statement like:

if equ \%a xx echo "Dos equis"

   would work correctly sometimes and others would get a parse error,
   depending on whether the variable (\%a in this case) had a non-empty
   definition. The normal workaround is to write it like this:

if equ "\%a" "xx" echo "Dos equis"

   but that shouldn't be necessary, since the parser knows that (a) the
   statement does not have a syntax error and (b) it has evaluated a
   variable that has an empty (or no) value, in which case it should
   simply return an empty string instead of a failure code. I ran several
   of my huge production scripts with this change with no ill effects, and
   in fact it let me track down several long-elusive problems in the
   scripts. ckucmd.c, 6 Dec 2013.

   A major annoyance with C-Kermit scripts is that when a command fails,
   we often get no clue about which command it was or where it was. This
   happens when the command issues its own error message (e.g. "?Text
   required") and returns -9 to the parser to indicate an error message
   was already printed (on the assumption that the user just typed the bad
   command and so knows what it is). In the cases where the command did
   not already issue an error message, the parser already echoed the
   command that failed. I changed the parser to do this in the -9 case
   too. ckuus5.c, 6 Dec 2013.

   (Another problem in this area is just too hard to fix, namely that when
   the parser is executing a script and a command fails, the parser often
   has no idea which line of the script file the failing command came
   from. That's because when reading a script file, the parser
   concatenates each {...} block into a single line, so when a command
   within the block fails, the parser only knows the line number of the
   first line of the block.)

   From Jake Thompson: Fixed a typo in applying diffs to ckcsig.h. Fixed
   some locale-related #ifdefs in ckuusr.h and ckuus5.c. Also added the
   ability to suppress locale support at compile time via -DNOLOCALE
   (ckcdeb.h). 6 Dec 2013.

Dev.07

   Built OK on NetBSD 6.1.2. Built OK on RHEL4. Could not build with SSL
   on NetBSD because "can't open config file: /etc/openssl/openssl.cnf".
   Built OK on Linux with OpenSSL 0.9.7a but for some reason a ton of
   "passing arg ... from incompatible pointer type" messages came out of
   DES_*() function invocations, which didn't happen before. Built OK on
   Solaris 9 without SSL, and with OpenSSL 0.9.8q (with no warnings, but
   this one doesn't have DES). 24 Nov 2013.

   Commented out calls to shoreg(). ckuus[r5].c, 24 Nov 2013.

   Changed program name in Windows from "Kermit 95" to "C-Kermit".
   ckcmai.c, 24 Nov 2013.

   Removed or updated numerous references to Columbia University, many
   modules, 24 Nov 2013.

   Changes to make current C-Kermit source code integrate with Kermit 95
   code, from from Jake Thompson, 21 Nov 2013:
     * Inconsistent declarations of nzxpand() in Unix and Windows,
       ckcdeb.h.
     * Extraneous prototype of ckcgetc() in ckcker.h.
     * Duplicate definition of __inline int in ckcsig.h.
     * Similar issues in ckcuni.h.
     * Windows OpenSSL doesn't have X509_to_user() or X509_userok(),
       ck_ssl.c.
     * No longer necessary to #include ckosslc.h and ckossl.h in ck_ssl.c.
     * zgfs_link and linkname not implemented in K95: ckuus4.c.
     * Include ckodir.h for MAXPATHLEN in ckuus[46].c.
     * chkaes() calling sequence is different in K95: ckuusr.h.

   Each change marked with "[jt] 2013/11/21". 24 Nov 2013.

   Android changes from Jake Thompson, 17 Nov 2013:
     * Disable locales in android.mk
     * Disable "format string checks" in the ndk-build invocation,
       android.txt.

   Updated HELP FUNCTION PICTUREINFO. ckuus2.c, 15 Oct 2013.

   \fpictureinfo() problem from 17 Sep 2013 was because I was using a tail
   anchor ($) on the pattern but had not set the ckmatch() opts bit saying
   so. Removed the tail anchor. Also changed the function to return 3
   ("square") if width == height (so it's kind of like a bit mask).
   ckuus4.c, 15 Oct 2013.

   The documentation had the sense of the second argument to \fdayname()
   and \fmonthname() backwards. Fixed in locale.html, 15 Oct 2013.

   \fdayname(\v(nday)) would fail if executed on Sunday because \v(nday)
   numbers days 0 (Sunday) to 6 (Saturday), whereas \fdayname() wants 1
   (Monday) through 7 (Sunday). Also, \fdayname(,1) would return "Jan" if
   today was Sunday. Fixed by allowing both 0 and 7 to mean Sunday. All
   the other day numbers agree. ckuus4.c, 15 Oct 2013.

   If the CHANGE command was used repeatedly, eventually C-Kermit would
   get a memory allocation error. A dynamic buffer was not being freed.
   Fixed in ckuus6.c, 15 Oct 2013.

   Changed CHANGE message to put spaces around the "->" so it doesn't get
   intepreted by the terminal emulator as part of a URL. ckuus6.c, 11 Oct
   2013.

   \fpictureinfo() was checking the filename against a pattern and failing
   on no match, sometimes incorrectly. I took out the filename check,
   since the next thing it does is check the internal structure of the
   file. ckuus4.c, 17 Sep 2013.

   ckuus5.c:597:29: warning: missing terminating " character <- fixed 3
   Sep 2013.

   NetBSD 6.1, man 3 time: "In NetBSD 6.0 the time_t type was changed to
   be 64 bits wide, including on 32-bit machines, making rollover a
   concern for the far distant future only. Note however that any code
   making the incorrect assumption that time_t is the same as long will
   fail on 32-bit machines in 2038." C-Kermit builds OK but warns:
ckcmai.c:(.text+0x1e92): warning: warning: reference to compatibility
time(); include <time.h> for correct reference


   Did this and all's OK. But it might have repercussions elsewhere.
   ckcmai.c, 3 Sep 2013.

   Added clarification to HELP CHANGE about string format. ckuus2.c, 3 Sep
   2013.

   Changed CHANGE /SIMULATE to list files that would NOT be changed only
   if the /VERBOSE switch was included. ckuus6.c, 4 Aug 2013.

   The CHANGE command would indicate failure even when there was no error.
   Fixed in ckuus6.c, 4 Aug 2013.

Dev.06

   A new command-line options, --nolocale, was added to disable use of the
   locale by forcing the "C" locale. Ditto if the environment variable
   K_NOLOCALE is set to a nonzero integer value. ckuusr.h, ckuusy.c,
   ckcmai.c, 24 Jul 2013.

   Developed, built and tested on NetBSD with English, Spanish, and
   German. Built and tested OK on Linux RHEL5 with the same languages.
   Built OK on Solaris 9, which supports the locale APIs, but does not
   have any locales installed except en_US. 24 Jul 2013.

   CAUTION: Except where C-Kermit is explicitly dealing with multibyte
   character sets, such as in file transfer and in the terminal emulator,
   there is no special support for multibyte character sets such as UTF-8,
   Shift-JIS, etc. So while \fupper(), \flower(), and \fcapitalize() can
   work with ISO-8859-1, KOI-8, and other single-byte character sets, they
   won't work with UTF-8 because they are just byte loops, unless the
   underlying isupper, tolower, etc, functions (or macros, or whatever
   they are) do some magic. Ditto for Shift-JIS, Japanese EUC, etc.

   Added HELP text for \fmonthame() and \fdayname(). ckuus2.c, 24 Jul
   2013.

   Added \fmonthame(), like \fdayname() but for months. ckuusr.h,
   ckuus4.c, 24 Jul 2013.

   Added locale_monthame(month,fc), like locale_dayame(day,fc) but for
   months. ckutio.c, 24 Jul 2013.

   Added \fdayname(date,fc), where date can be any free-format date/time
   string, with or without the time, or omitted to give the name of the
   current day. fc is a function code: 0 to return the name in full,
   nonzero to abbreviate it according to the locale; if fc is omitted, the
   abbreviated form is returned. The full or abbreviated day name is
   returned in the language and character set specified or implied by the
   locale if the underlying platform is configured for it; otherwise they
   come out in English. These routines builds upon all of the date-time
   code that was added in 2003, particularly cmcvtdate(), the free-format
   date parser, and mjd(), that calculates a Modifed Julian Date, from
   which the day of the week can be derived by a simple modulus. This
   function pretty much supersedes \fday() (which returns only the
   3-letter English day name), but \fday() remains available for
   compatibility. ckuusr.h, ckuus4.c, 24 Jul 2013.

   Put a locale_dayname() function in ckutio.c. This is compiled if
   HAVE_LOCALE is defined and NO_LOCALE is not defined. HAVE_LOCALE is
   defined for BSD44 and POSIX, VMS, OS/2, and Windows. These definitions
   can be adjusted if necessary in ckcdeb.h and NO_LOCALE can be included
   on the make command line to override in case of trouble. ckcdeb.h,
   ckutio.c, 23 Jul 2013.

   Added \v(year), which evaluates to the current year, e.g. 2013. Mainly
   because I keep expecting it to be there. Also \v(month) (three-letter
   month abbreviation, English) and \v(nmonth) (2-digit month number,
   01-12). ckuusr.h, ckuus4.c, 22 Jul 2013.

   Note that \v(month) and \v(day) are not ideal -- abbreviations, not
   full names, and English only. I added \v(month) and \v(nmonth) only for
   symmetry with \v(day) and \v(nday). These shortcomings are remedied in
   the next items.

   Until now there was no straightforward way to extract a field from a
   date-time string. As a start, I added a new output format, 5, for
   \fcvtdate(), to make the result be numeric with fields delimited by
   ':', for example: 2013:07:22:15:19:43. Any desired field can be
   extracted with \fword(), for example to get the current year:
   \fword(\fcvtdate(,5),1), or for the current month
   \fword(\fcvtdate(,5),2). And so on. Since each field is numeric, it can
   index into tables of (say) month names or day names in the desired
   language and character-set. ckucmd.c, 22 Jul 2013.

   CHANGE works by copying each file to a temporary directory, making
   changes to the copy, and then renaming the copy over the original file.
   It was doing this for all files, even when they weren't actually
   changed (i.e. did not contain string1). Also if \v(tmpdir) was defined
   to be a directory that did not exist, the CHANGE command didn't try to
   create it. Both fixed in ckuus6.c, 22 Jul 2013.

   Added HELP CHANGE text. ckuus2.c, 22 Jul 2013.

   Suppose you want to do something to all the files whose names match a
   certain pattern and that contain a certain string or text that matches
   a certain pattern. For example, in a website with thousands of html
   files, all the ones that contain links to a site that disappeared. How
   to get a list of such files? I added an /ARRAY:&x switch to Kermit's
   GREP command for this. Then after the GREP command the resulting array
   can be accessed in a loop to process the desired files -- delete,
   rename, transfer, etc. Element 0 of the array tells now many files
   contained a match and how many elements are in the array (1-based).
   ckuus6.c, 22 Jul 2013.

   Updated SUPPORT command text. ckuus2.c, 3 May 2013.

   Added a CHANGE command that's part of the DIRECTORY / TOUCH family,
   with most of the same file-selection switches:

CHANGE /switches filespec string1 [ string2 ]

   Example:

CHANGE /RECURSIVE ~/web/*.html http://www.oldsite.com http://www.newsite.com

   The syntax of the command is a little annoying because Unix users would
   expect the filespec to come last, but the command shares a vast amount
   of parsing and execution code with DIRECTORY and TOUCH, which I didn't
   want to duplicate.

   CHANGE-specific switches:

/CASE:{ON,OFF} - Honor/Ignore alphabetic case when searching for string1
/MODTIME:{PRESERVE,UPDATE} - Modtime for changed file
/SIMULATE - Say which files would be changed without changing them.

   ckuusr.[ch], ckuus6.c, 3 May 2013.

   Built on Linux RH 5.9 x86_64, 18 Apr 2013.

   But when doing the Kerberos+SSL build:

 -L/usr/kerberos/lib -L/usr/local/ssl/

   lib -lssl -ldes425 -lpam -lz -lcrypto -lgssapi_krb5 -lkrb5 -lk5crypto
   -lcom_err -lncurses -lutil -lresolv -lcrypt -lm

   ?OpenSSL libraries do not match required version:
     * C-Kermit built with OpenSSL 1.0.1c 10 May 2012
     * Version found OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008 OpenSSL
       versions prior to 1.0.0 must be the same. Set LD_LIBRARY_PATH for
       OpenSSL 1.0.1c 10 May 2012. Or rebuild C-Kermit from source on this
       computer to make versions agree. C-Kermit makefile target:
       linux+krb5+ssl Or if that is what you did then try to find out why
       the program loader (image activator) is choosing a different
       OpenSSL library than the one specified in the build.

   Looked into making ==, if >, etc, work with strings, as one might
   expect from other languages like Javascript. Turned out to be
   unworkable because these constructions accept not only numeric
   constants and numeric-valued variables, but also arithmetic
   expressions. The idea would have been that if either of the two
   operands was non-numeric once evaluated, lexical comparison would be
   done instead of arithmetic comparison. The fly in the ointment is
   something like this:

if > x*(x+1) 2000 ...

   When the arithmetic comparison operators are used, Kermit knows that
   the operands must be numbers, so any non-numeric strings like 'x' in
   the example above are automatically treated as macros and evaluated.
   But if we check first to see if the string is non-numeric, it will be,
   and the same evaluation will not be done, and the operands will be
   compared as strings, giving a result that could only be right by
   accident.

   For convenience, two new IF conditions have been added: IF BINARY
   filename succeeds if the named file is a binary file (meaning that it
   would be transferred in binary mode by Kermit): an executable program,
   an object file, an image file, etc. IF TEXT filename succeeds if the
   named file is a text file, such as the file you are reading, or program
   source code, or an HTML or XML file, etc, regardless of the character
   encoding. If the file is a directory, both IF TEXT and IF BINARY fail.
   If the file is a link, the result reflects the contents of the
   linked-to file. ckuus[26].c, 17 Apr 2013.

   Added a 9th element to the \ffileinfo() result array: analysis of
   contents of the file, if it is a regular file (not a directory or a
   link):

text:7bit      7-bit text (e.g. ASCII, ISO 646)
text:utf8      Unicode 8-bit Transformation Format (UTF-8)
text:ucs2      Raw Unicode
text:8bit      8-bit text (e.g. ISO 8859-1, Windows CP 1252)
text:unknown   Text, unknown encoding
binary         Binary (e.g. an executable, object, or image file)

   This analysis is performed using the same file scanner that is used
   during file transfer to set up text mode versus binary mode, and to set
   up the character-set conversion if possible. If the file is not a
   regular file, the 9th element is empty. Suppose the array is \&a[].
   Then:

if equ "\fleft(\&a[9],4)" "text"  (or if equ "\fword(\&a[9],1) "text")

   or:

if neq "\&a[9]" "binary"

   the file is a text file, not a binary file, a directory file, or a
   link. This is useful if you don't care about the encoding. ckuus4.c, 16
   Apr 2013.

   Sure enough the next day this caught mistakes in TWO of my overnight
   cron job scripts: One was "if not <misspelled variable name>". The
   other was "if neq ...". There is no "if neq". Added IF NEQ, IF LLE, IF
   LGE, since even I expected them to be there. ckuus[26].c, 16 Apr 2016.

Dev.05

   Built on NetBSD 5.1.2, Solaris 9, FreeBSD 6.4, SCO OSR6.0.0, Linux
   Slackware 13.37.0, Linux RHEL5 (64-bit), Linux RHEL4 32-bit (with and
   without OpenSSL), all with no complaints.a

   Changed references in C-Kermit help text from kermit.columbia.edu to
   www.kermitproject.org. ckuus2.c, 15 Apr 2013.

   Here is an incompatible change: Noticed that "if lkjlkjlkj" (where
   lkjlkjlkj is just some gibberish) did not produce an error. The token
   following IF is supposed to be a keyword, a number, a variable that
   evaluates to a number, or the name of a macro whose value is a number.
   A string of gibberish is none of these, but the code in this case would
   treat the gibberish as "false" (i.e. as the name of a macro whose value
   was 0) and proceed to not execute the statement (or worse, if there
   were an ELSE part, it would execute it). I would hope that nobody ever
   noticed, much less relied on, this undocumented misfeature. Fixed in
   boolexp(), ckuus6.c, 15 Apr 2013.

   Added IF FUNCTION name, to test if the given built-in function is
   available. The name can be entered as name, \fname(), \\fname, or any
   combination, e.g. "if function left", "if func \fleft()", "if func
   left()", etc. ckuus[26].c, 15 Apr 2013.

   Added \ffilecompare(file1,file2) function. Returns 0 if the contents of
   the two files is identical, 1 if they differ, and -1 on any kind of
   error (file not found, etc). ckuus[24].c, 15 Apr 2013.

   Discovered that TOUCH /MODTIME could, in some cases, destroy an
   existing file, oops. Fixed in domydir(), ckuus6.c , 15 Apr 2013.

   Fixed \fpictureinof() to handle Unix filenames with tilde notation.
   Also checked to make sure that no other \functions() had this problem.
   ckuus4.c, 15 Apr 2013.

   Added a third element to the \fpictureinfo() result array: the "date
   taken", if any, recorded by the camera or scanner. This is done in the
   dumbest possible way, without attempting to parse the Exif structure;
   Kermit simply scans the first 8K of the JPG file looking for valid
   date-time strings, and keeps the earliest one found. ckuus4.c, 14 Apr
   2013.

   Looking at this in more detail... C-Kermit says DO KERMIT, WILL KERMIT.
   Remote says WILL KERMIT, DON'T KERMIT. In other words the remote is
   saying "I will do Kermit, I refuse to negotiate about Kermit". As soon
   as C-Kermit receives WILL KERMIT, it sends SB KERMIT SOP to tell the
   remote what its Kermit-protocol start-of-packet character is; this is
   required by RFC2840. The remote is required to respond with *its*
   start-of-packet character, but it never does, since its WILL KERMIT was
   in error. So upon receiving DONT Kermit I turned off the flag that said
   the other Kermit supports and will use the Kermit option. This allows
   the connection to be made to the Synchronet Telnet server without
   forcing the user to SET TELNET WAIT OFF or (even more obscure) SET
   TELOPT KERMIT REFUSE REFUSE. ckctel.c, 12 Apr 2013.

   Lawrence Woodman reported that with SET TELNET WAIT OFF, if C-Kermit
   telnets to a site that doesn't properly respond to all Telnet
   negotions, such as b4bbs.sampsa.com (running Synchronet BBS software),
   the initial connection works OK (Kermit doesn't wait), but then after
   escaping back and connecting again, TELNET WAIT switches back to ON.
   This is evidently because of the TELNET KERMIT negotiations, which
   require waiting. But it occurs to me that nobody is using the TELNET
   KERMIT option due to lack of support for it, so if the user says SET
   TELNET WAIT OFF, this should not be overriden silently. (In fact,
   C-Kermit said WILL KERMIT, the remote said DONT KERMIT, so I think the
   problem is deeper, because for some reason C-Kermit was sending SB
   REQ_STOP even though the Telnet KERMIT option was not negotiated, but
   let's come back to this if there is ever any reason to.) I fixed the
   problem by not sending SB_STOP_REQ is SET TELNET WAIT is OFF. ckctel.c,
   line 2238, 9 Apr 2013.

Dev.04

   Made a new function \ffileinfo(name,&a) that populates the specified
   array with 7 or 8 elements:

 1. the file's name;
 2. the full path of the directory where the file resides;
 3. the file's modification date-time yyyymmdd hh:mm:ss;
 4. platform-specific permissions string, e.g. "drwxrwxr-x" or "RWED,RWE,RE,E";
 5. platform-specific permissions code, e.g. an octal number like 40775;
 6. the file's size in bytes;
 7. file type: 1=regular file; 2=executable; 3=directory; 4=link; 0=unknown.
 8. (if filename is link) name of linked-to file.

   ckuusr.h, ckuus[24].c, 14 Mar 2013.

   ziperm() and zgperm() did not work in Unix for filespecs that used
   tilde notation, e.g. ~/kermit/ckuusr.h. Fixed in ckufio.c, 14 Mar 2013.

   Added SET EXIT MESSAGE { ON, OFF, STDOUT, STDERR }, so the text (if
   any) from an EXIT command (e.g. EXIT 1 "File not found") can be
   supressed, printed normally, or sent to stderr. Added EXIT MESSAGE
   status to SHOW EXIT and updated HELP SET EXIT. ckuus[235].c, 13 Mar
   2013.

Dev.03

   Since Oct 2006 C-Kermit has had a very handy TOUCH command, much more
   useful that Unix's because of all the file-selection options (switches)
   that go with it, the same, in fact, as the DIRECTORY command, even
   though a few of them (such as /OUTPUT) don't make much sense with
   TOUCH. But one thing that Kermit TOUCH can't do that Unix touch can is
   to set the file's mod time to an arbitrary date-time. Up until now,
   Kermit TOUCH can only give it the current date-time. To add this
   capability in a sensible way, I started by giving TOUCH its own switch
   table. In doing this I also corrected a long-standing error in the
   original DIRECTORY switch table, in which one of the keywords,
   /FOLLOWLINKS, was out of order, which could have resulted in spurious
   parse errors or failures. ckuusr.h, ckuus6.c, 12 Mar 2013.

   Added TOUCH /MODTIME:xxx, allowing a specific date-time to be set; xxx
   is a free-format date and/or time as described by "HELP DATE". This
   works both for all existing files that are selected by the switches and
   wildcard patterns, or for a single nonexistent file, i.e. to create a
   new file with a given modification date-time. Also added TOUCH /LIST,
   which lists the files that were touched, and and TOUCH /SIMULATE which
   lists the files that would be touched without actually touching them.
   ckuus6.c, 12 Mar 2013.

   New HELP TOUCH text. ckuus2.c, 12 Mar 2013.

   Fixed HELP INCREMENT and HELP DECREMENT to clarify that the operations
   use integer arithmetic and the result is always an integer. ckuus2.c,
   13 Mar 2013.

   A large manufacturing company upgraded from MS-DOS Kermit to Kermit 95
   because new PCs were installed that could no longer use MS-DOS Kermit.
   These PCs are used to control Cincinnati (now MAG IAS) machines (press
   brakes, composite tape layers, etc), which use their own implementation
   of Kermit protocol to exchange data with the PC. Where MS-DOS Kermit
   had been working fine in this capacity for some 20 years, K95 failed
   consistently after the 13th packet. The Cincinnati machines are quite
   old and (from the standpoint of their communications) quite primitive,
   communicating over a serial port at 19.2Kbps with no flow control. When
   receiving a file, they buffer the incoming file data and when the
   buffer fills, they "turn around" to write out the buffer, but this
   takes a long time. The difference between MS-DOS Kermit and K95 (and
   C-Kermit for that matter, which runs the same protocol code) is that
   packet timeouts in MS-DOS Kermit are fixed, whereas those in
   C-Kermit/K95 are dynamic, varying according to the characteristics of
   the transfer in progress. In this case the first 12 ACKs were received
   promptly so K95's timeout reduced itself to an interval shorter than
   the time needed by the machine to write out its buffer. K95 resent the
   packet at a time when the machine was not prepared to receive it and
   matters went downhill from there. The resolution was to tell K95 to use
   a longer timout interval, and to make it fixed, not dynamic:

SET SEND TIMEOUT 20 FIXED

   This raised two issues:

 1. This feature was implemented in C-Kermit 6.0.192 from 1996, and
    as such is documented in "Using C-Kermit", but not online, so it
    took me quite a while to find it even though it's my own creation.

 2. It's not documented in the brake.html page, which discusses how to
    use Kermit software with Cincinnati CNC machines.

 3. A long fixed timeout should have been included in the ROBUST command.

   I updated the ROBUST command in ckuus5.c, and updated the brake.html
   page on the new Kermit website. 12 Mar 2013.

   The change of Nov 2 still needs work. Modern Unix servers tend to have
   ever-longer pathnames so even with the previous change we're still
   seeing the truncated pathnames on the file transfer display of the
   sender which is less than helpful when sending a large group of files;
   you can't see the filenames and have no idea how far along the transfer
   is (because the thermometer applies only to the current file, not the
   whole group). Why should C-Kermit, when receiving files, send back the
   entire pathname when the incoming file is being stored in its current
   directory? No reason. Added code to chop it off. ckcpro.w, 11 March
   2013.

   (Obviously it would be better for the progess indicator to apply to the
   whole transfer than to the current file out of possibly many, but that
   would require a change to the protocol itself, in which the file sender
   makes a pass through the file list to get the total size of all files
   and then sends a new kind of message to the receiver with this
   information. Possibly this could be done in the A packet: File #x out
   of y in a transfer of total size z.)

   In the 1980s and 90s, before switches were added to Kermit command
   syntax, there was a MOVE command, which meant to send a file and then
   delete the original after it had been sent successfully. When switches
   were added in C-Kermit 7.0 in 2000, this function was assigned to SEND
   /DELETE. The MOVE command was left behind for compatibility.
   Unfortunately it's so similar to the Unix 'mv' that I (for one) keep
   using it when I mean RENAME. On the supposition that nobody uses MOVE
   in the SEND /DELETE sense any more (if they ever did), I changed it to
   be a synonym for RENAME. If you build C-Kermit with -DOLDMOVE in
   KFLAGS, the old behavior is restored. ckuus[r2].c, 11 Mar 2013.

   The DIRECTORY command has a lot of switches for file selection, sorting
   of results, etc. These include an /ARRAY: switch that allows the
   resulting filenames to be stored in an array rather than being printed,
   so they can be processed by a script; for example, to do something with
   the files that were selected by the DIRECTORY command switches. But the
   array was constructed before processing the switches and doing any
   sorting. So, for example, DIRECTORY /SORT:SIZE /TOP:10 /ARRAY:&a, which
   you would expect to load the array a with the 10 largest files in the
   current directly in reverse order of size, loads all the files in
   alphabetical order. Fixed in domydir(), ckuus6.c, 11 Mar 2013.

   The S-Expression processor sometimes dumped core if an invalid operator
   was given. Fixed in dosexp(), ckuus3.c, 11 March 2012.

   Added note about Raspberry Pi (that it builds normally with any of the
   Linux targets) to the Makefile, 11 Mar 2013.

   Correction to yesterday's, which didn't account for SET CD HOME.
   ckcpro.w, ckcmai.c, ckuus[454].c, 3 Nov 2012.

   When uploading files to Unix from K95, it has become increasingly
   unlikely that the filename is shown on the file-transfer display
   because Unix pathnames are growing longer and longer all the time, and
   the name part disappears off the edge. This can't be fixed in K95
   (since nobody has yet been able to build it from source code), but it
   can be ameliorated in C-Kermit in many cases by shortening the pathname
   sent back to K95 when receiving files from or under the user's Unix
   login directory, by replacing login directory path prefix with "~/".
   This was done within #ifdef UNIX .. #endif in ckcpro.w, in the place
   where the protocol state machine handles an F packet. It could probably
   also be done in VMS, but probably not worth it ("SYS$LOGIN:" is not
   exactly short). This could be expanded, with some effort, to other
   people's directories ("~eddie/"). ckcpro.w, ckcmai.c, makefile, 2 Nov
   2012.

   Added android.mk (makefile) and android.txt (README) to regular Unix
   tarball. 20 Jul 2012.

   Built OK on Linux RHEL4 32-bit with: "make linux", "make linux+SSL"
   (OpenSSL 0.9.7a). Built OK on Linux RHEL5 64-bit with: "make linux",
   "make linux+krb5", "make linux+SSL KFLAGS=-UCK_DES" (0.9.8q). Also with
   "make linux KFLAGS=-DANDROID" to see the vanity herald. Built OK on
   Solaris 9 with and without OpenSSL (0.9.8q). Built OK on NetBSD 5.1.2
   with and without OpenSSL (0.9.9-dev). Built on NetBSD 5.1.2 with
   Kerberos V 1.6.3; lots of warnings but it runs.

   From Ian Beckwith (Debian), support for multiarchitecture curses
   library in Linux; also libresolv, libcrypt, liblockdev, libk5crypto,
   libgssapi_krb5. Don't know if these changes work, but at least they
   don't seem to hurt anything. makefile, 20 Jul 2012.

   From Adam Friedlander: an updated OpenSSL version test obtained after
   consultation with Jeff Altman incorporating the new rules for when the
   OpenSSL 1.x.yz ABI changes. ck_ssl.[ch], 20 Jul 2012.

   Vanity herald for Android: ckuver.h, 20 Jul 2012.

   From Tim Sneddon:
   [76]http://tim.sneddon.id.au/blog/Posts/C-Kermit_for_Android -
   Adaptation of C-Kermit to Android via the Linux path; required very few
   changes, mainly #ifdef'ing a couple Linux APIs not supported in
   Android. ckcdeb.h, ckufio.c, ckutio.c, 20 Jul 2012.

   Changed version to 9.0.304 Dev.01. ckckmai.c, 28 May 2012.

   From Adam Friedlander: OpenSSL version test was preventing C-Kermit
   from starting when the installed OpenSSL version was >= 1.0.0 and there
   was a change in the last letter (e.g. 1.0.0a to 1.0.0b) or to the last
   number (e.g. 1.0.0 to 1.0.1), but these changes do not indicate ABI
   incompatibility. This was forcing rebuild and reinstallation of
   C-Kermit every time a minor update was made to OpenSSL (e.g. on Ubuntu
   Linux that has preinstalled binaries). ck_ssl.[ch], ckcmai.c, 28 May
   2012.

   Fixed a problem with 'make linux "KFLAGS=-DNOICP -DNOSPL -DNOHELP
   -DNODEBUG"' in which fp_rounding and fp_digits came up undefined.
   ckuus4.c, 28 May 2012.

   Changed version to 9.0.303. ckcmai.c, 23 Aug 2011.

   From Edward Berner: C-Kermit 9.0 on OpenBSD on sparc64 gets a "Bus
   error" and dumps core when receiving a file. Some variables were
   defined long or CK_OFF_T and extern'd as int from other modules. Edward
   found and corrected all instances of this. The variables were filcnt,
   dest, filrej, dialcapas. ckcpro.w, ckuusx.c, 23 Aug 2011.

   Fixed freebsd+ssl and netbsd+ssl, netbsd+krb5, and netbsd+krb5+ssl
   targets to have CC=$(CC) instead of CC=gcc; ditto for CC2, and adjusted
   line breaks in freebsd and freebsd+ssl targets for easier patching.
   makefile, 21 Aug 2011.

9.0.302

   Changed the version to 9.0.302, ckcmai.c, 20 Aug 2011. Released and
   announced the same day.

   FreeBSD 9 switched from utmp to utmpx, which broke compilation of
   Kermit on that version. Furthermore, the UUCP lockfile conventions
   changed in FreeBSD 8, which did not prevent C-Kermit from compiling,
   but any attempt to lock a terminal or pty device would fail. Thanks to
   Alexey Dokuchaev "danfe" for finding and patching the problems. I undid
   the patches and fixed the code so it didn't need to be patched, except
   for some declarations in the ck_crp.c module, which I felt had better
   not be changed without thoroughly testing the changes on dozens of
   different platforms, which I don't have time to do (in any case, it
   builds OK on FreeBSD 9 without the patch). In particular I made
   completely new makefile targets for FreeBSD 4.0 and later, which
   automatically detect FreeBSD 8 and FreeBSD 9 to enable the appropriate
   feature tests in the code, for a regular build and a build with
   OpenSSL. These changes should affect only FreeBSD. ckutio.c, ckufio.c,
   ck_crp.c, ckuus5.c, makefile, 20 Aug 2011.

   Added and successfully used a new solaris9+krb5+ssl target. makefile, 8
   Aug 2011.

   Added another search term for lk5crypto in the linux+krb5 targets.
   makefile, 20 July 2011.

   In the new copyright notice, copied from the BSD license template, one
   instance of "the <ORGANIZATION>" was not replaced by "Columbia
   University". Fixed in ckcmai.c, 19 July 2011.

   After the initial release I made some small changes that affect only
   HP-UX 5.x: added -DVOID=void and -DCKVOID=void to the hpux0500 makefile
   targets, and put #ifdefs around #include <errno.h>, which (in the
   WinTCP case) didn't protect itself against multiple inclusion (which is
   happening in other header files, not in Kermit). makefile, ckucmd.c,
   ckucon.c, ckutio.c, ckufio.c, ckcnet.c, ckcftp.c, 14 July 2011.

C-Kermit 9.0.301

   Updated version text and date. ckcmai.c, makefile, 11 July 2011.

C-Kermit 9.0.301 Beta.01

   Built and tested on Solaris 9, Solaris 10, and RHEL5. 6 July 2011.

   From SMS: To avoid the %CC-W-PTRMISMATCH1 complaints from ck_ssl.c, add
   two (harmless) type casts at lines 2460 and 2773, 6 July 2011.

   On Solaris 10 and 11, DNS lookups don't work. It seems these Solaris
   versions have INADDRX and INADDRX_NONE defined, thus triggering the
   code in ckcnet.c, ckucns.c, and ckcftp.c #ifdef'd on these symbols, but
   that code doesn't work in this case. This happens building with gcc as
   well as with Sun cc. Put #ifdefs in ckcnet.h to undefine these symbols
   (if they are defined after including all the header files) for Solaris.
   I didn't bother trying to differentiate the Solaris versions because
   the symbols are not defined in Solaris 9 or earlier, and they should
   not be used in Solaris 10 or 11. ckcnet.h, 6 July 2011.

C-Kermit 9.0.300

   Removed solaris9_64 target from makefile. It builds but it doesn't work
   at all. 30 Jun 2011.

   Updated version to 9.0.300 and removed the Beta designation. ckcmai.c,
   makefile, 28 Jun 2011.

   From Martin Vorlaender, a fix for the VMS file-transfer display and
   statistics, a place where a file length wasn't being cast to CK_OFF_T
   in zchki(). ckvfio.c, 28 Jun 2011.

   From Arthur Marsh, a few more directories to test for libresolv in
   Linux. makefile, 26 Jun 2011.

   I had been wanting the S-Expression (ROUND x) to allow a second
   argument n, which, if given, tells where the rounding should occur. If
   n is positive, the number is rounded to n decimal places. If zero, it
   is rounded to the nearest integer If negative, the number is rounded to
   the nearest power of 10; e.g. -2 means "to the nearest hundred". If
   ROUND is used as before, with one argument, it works as before.
   ckclib.c, ckuus3.c, 25 Jun 2011.

   Got access to perhaps the last living 4.3BSD VAX system. It doesn't
   have SEEK_CUR so I had to #ifdef out the \fpicture() function. Aside
   from that, no problems. ckuus4.c, 24 Jun 2011.

   Fixed some typos in COPYING.TXT (noticed by Ian Beckwith). 24 Jun 2011.

   I found a Linux box that had both Kerberos 4 and 5 installed and tried
   'make linux+krb5+krb4', which failed because of missing DES functions.
   Tried 'make linux+krb5+krb4 KFLAGS=-UCK_DES', but that fails too, even
   though it doesn't fail for Kerberos 5 alone, so probably some Krb4 code
   is making unguarded calls to the DES routines. What is really needed is
   a way to completely strip all DES references from any given build, code
   and makefile, a big deal. 21 Jun 2011.

   In Debian 7.0, libk5crypto could not be found without adding another
   clause to 'make linux+krb5'. That done, the SSL build (1.0.0d) was OK,
   as well as the krb5+ssl one. makefile, 21 Jun 2011.

   Got access to Debian 5.0 and 7-to-be ("Wheezy/Sid"). Regular 'make
   linux' is OK in Debian 5, but in 7 can't find crypt, res_search, or
   dn_expand; had to add more library search clauses to 'make linux'.
   makefile, 21 Jun 2011.

   Got reports back on HPUX from Peter Eichhorn, almost all good on HP-UX
   7, 8, 9, 10, and 11. 21-22 Jun 2011.

   Checked current code on RHEL4, found that my GSSAPI-lib finding
   makefile target didn't look in enough places; added some more.
   makefile, 21 Jun 2011.

   Really it would have been nicer if \s(xx[4]) returned a single
   character, the 4th character of xx, but it's too late now. Added
   another "separator" character '.' (period) for that: \s(xx[4.]) is the
   4th character of xx. ckuus4.c, 20 Jun 2010.

   Back to SCO OSR5.0.7... This failed before because 'rdchk' came up
   unknown at link time, unlike all previous OSR5's, that used rdchk() in
   place of the FIONREAD ioctl. Added #ifdefs to make a special case for
   5.0.7. I'm not sure this is the best way, but this is the minimal
   change to get it to work. If anybody cares, maybe the same can be done
   for previous OSR5 releases. ckutio.c, 20 Jun 2010 (search for
   SCO_OSR507).

   SCO OpenServer 5.0.7 i386 32 sco32v507 1895724 No TCP/IP SCO OpenServer
   5.0.7 i386 32 sco32v507net 2246792 With TCP/IP

   When using compact substring notation, \s(xx[4]) returns the whole
   string xx starting at position 4, but \s(xx[4:]) returns an empty
   string. Fixed the latter to be like the former. ckuus5.c, 20 Jun 2010.

   Ditto for Solaris 2.6/i386, except 57.6Kbps, 4K-byte packets, no
   problem. Solaris 8/i386, ditto. 19 Jun 2011.

   SCO OpenServer 5.0.5 i386 32 sco32v505udk 1940964 No TCP/IP SCO
   OpenServer 5.0.5 i386 32 sco32v505udknet 2314668 With TCP/IP Sun
   Solaris 2.6 i386 32 solaris26g 4661368 Sun Solaris 8 i386 32 solaris8g
   4675432

   Transferred the tarball over serial ports to SCO OSR5.0.5 at 38.4Kbps,
   the highest speed supported, 12 minutes, no errors, 3300cps. Unpack,
   make sco32v505udk, OK. Also built the TCP/IP version and it almost made
   an outbound connection, but only once (not a Kermit problem but
   something with the TCP/IP stack). 19 Jun 2011.

   For the pluggable-disk OS's that boot OK but lack a working network, I
   rigged up a serial connection using a DB9-FF null modem cable, and then
   a DB9-MF modem cable to make it reach. I don't see any modem signals on
   either end, but the data goes through OK. COM1 on the desktop PC,
   /dev/ttyS1 or whatever on Lab. Since there are no modem signals, can't
   use RTS/CTS. At 57600bps with Xon/Xoff, 500-byte packets and sliding
   windows, transfers work OK at about 5000cps using 5 window slots; takes
   8 minutes to transfer the gzipped C-Kermit tarball. Kermit to the
   rescue. 19 Jun 2011.

   More important he knew how to force gcc to load the right header files
   for OpenSSL 1.0.0d (by using '-isystem' rather than '-I'). Previously
   it was using the 0.9.8r header files but linking with the 1.0.0d
   libraries. This is not in the sources or makefile; it's done when
   giving the 'make' command:

export PATH=/usr/bin:$PATH
  export SSLINC=-isystem/usr/include
  export "SSLLIB=-L/usr/lib -Wl,-rpath,/usr/lib"
  make linux+ssl

   Folded the previous linux+openssl+zlib+shadow+pam and
   linux+openssl+shadow targets into linux+ssl. Checked the linuxso
   (scripting only) target, builds OK, 600K. Made new subroutinized
   linux+krb5+krb4 target but can't find anyplace to test it. Made new
   subroutinized linux+shadow+pam target, works fine on RHEL4. Revised
   comments and lists again. makefile, 18 Jun 2011.

   Nelson Beebe found two places where I had SSLLIBS in the makefile
   instead of SSLLIB. makefile, 18 Jun 2011.

   From John Dunlap: "Watching the server screen led me to offer a
   cosmetic patch for ckuusx.c. I noticed that the server screen said it
   was "RESENDING" when it really wasn't. The attached patch emits blanks
   to insure that old labels are completely erased." ckuusx.c, 17 Jun
   2011.

   sizeof() can return a long or an int, so neither
   printf("%d",sizeof(blah)); or printf("%ld",sizeof(blah)); can be used
   everywhere. Changed the "sizeofs" section of SHOW FEATURES in the
   dumbest (and therefore most portable) way to squelch the warnings.
   ckuus5.c, 17 Jun 2011.

C-Kermit 9.0.299 Beta.01

   16 June 2011 builds (Beta.01):
NetBSD 5.1 i386   32/64  netbsd+krb5+ssl   2451757 OpenSSL 0.9.9 MIT Krb5 1.6.3
Solaris 9  sparc  32/64  solaris9+krb5     2543036 MIT Kerberos 5 1.7.1
Solaris 9  sparc  32/64  solaris9+ssl      5021544 OpenSSL 0.9.8q (gcc)
Gentoo...    ppc    32/64  linux             2386597
Gentoo...    ppc    32/64  linux+ssl         2593561 OpenSSL 0.9.8r
Gentoo...    ppc64   64    linux             2749015
Gentoo...    ppc64   64    linux+ssl         3002150 OpenSSL 0.9.8r
RHEL5      x86_64  64    linux+krb5 (*)    2563878 MIT Kerberos 5 1.6.1
RHEL5      x86_64  64    linux+krb5+ssl(*) 2563878 MIT Kerberos 5 1.6.1
Fedora 14  i386   32/64  linux+krb5+ssl    2539891 MIT Krb5 + OpenSSL 0.9.8r

* KFLAGS=-UCK_DES

   Added lots of tests to the Linux Kerberos 5 entries, linux+krb5 and
   linux+krb5+ssl, because some have libk5crypto and some don't; some have
   libcom_err and some don't; and some have libgssapi_krb5 (e.g. RHEL5,
   OpenSuse 11.2) whereas others have libgssapi (Gentoo).

   Updated cu-solaris+krb5 target to test whether the GSSAPI library is
   called libgassapi or libgassapi_krb5. makefile, 16 Jun 2011.

   Updated the solaris9+ssl target to do the DES testing. makefile, 16 Jun
   2011.

   Changed the cu-solaris9-krb5 target to test for the presence of DES
   because DES isn't there, to see if this would allow a Kerberos build to
   proceed. And it worked, amazing. At least the build completed, I have
   no way to test the Kerberos part. makefile, 16 Jun 2011.

   Make a new netbsd+krb5+ssl target based on the combination of the new
   netbsd+ssl and netbsd+krb5 targets. There were lots of warnings in the
   compilation but no errors, but it produced an executable that starts
   and does normal things but I have no idea if the SSL or Kerberos
   functions work. makefile, 16 Jun 2011.

   15 June 2011 builds (Beta.01):

AIX 5.3                 ppc    32/64   aix+ssl        3283846 OpenSSL 0.9.8m
NetBSD 5.1              i386   32/64   netbsd         2159863
NetBSD 5.1              i386   32/64   netbsd+ssl     2350274 OpenSSL 0.9.9-dev
NetBSD 5.1              i386   32/64   netbsd+krb5    2349627 MIT Krb5 1.6.3
FreeBSD 8.2             i386   32/64   freebsd        2298414
FreeBSD 8.2             i386   32/64   freebsd+ssl    2448961 OpenSSL 0.9.8q
OpenBSD 4.7             i386   32/64   openbsd        2266132
OpenBSD 4.7             i386   32/64   openbsd+ssl    2409263 OpenSSL 0.9.8k
MirBSD 10               i386   32/64   mirbsd         2216601
MirBSD 10               i386   32/64   mirbsd+ssl     2358318 OpenSSL 0.9.8r
OpenSuse 11.2           x86_64  64     linux          2348468
OpenSuse 11.2           x86_64  64     linux+ssl (*)  2546540 OpenSSL 0.9.8r
RHEL 5.6                ia64    64     linux          4390687
RHEL 5.6                ia64    64     linux+ssl (*)  4775007 OpenSSL 0.9.8e
Ubuntu 9.10             i386   32/64   linux          2275523
Ubuntu 9.10             i386   32/64   linux+ssl      2466708 OpenSSL 0.9.8r
Gentoo 1.12.13          ppc    32/64   linux          2386597
Gentoo 1.12.13          ppc64   64     linux          2749015
Gentoo 1.12.13          ppc64   64     linux+ssl      3002150 OpenSSL 0.9.8r
Gentoo 1.12.13          sparc  32/64   linux          2478382
Gentoo 1.12.13          sparc  32/64   linux+ssl      2690499 OpenSSL 0.9.8r
Solaris 9               sparc  32/64   solaris9       2849896
Solaris 10              i386   32/64   solaris10      2837620
IRIX 6.5                R10000 32/64   irix65         2869704

* and KFLAGS=-UCK_DES

   Tried building on NetBSD 5.1 with Heimdal Kerberos using:

   make netbsd+krb5 \
 "KFLAGS=-DHEIMDAL" \
 "K5INC=-I/usr/include" \
 "K5LIB=-L/usr/lib"

   It found all its headers OK, but it blew up in ckuath.c. Small wonder,
   ckccfg.html says:

HEIMDAL
    Should be defined if Kerberos V support is provided by HEIMDAL. Support
    for this option is not complete in C-Kermit 8.0. Anyone interested in
    working on this should contact kermit-support.

   KERBEROS VERSION:

   'krb5-config --version' gives the MIT Kerberos 5 version number.

   Fixed the new linux+ssl target to actually use the SSLINC and SSLLIBS
   definitions, oops. makefile, 15 Jun 2011.

   Fixed some printf %ld vs int instances in the sizeofs section of SHOW
   FEATURES. ckuus5.c, 15 Jun 2011.

   SSL builds with OpenSSL < 0.9.7 fail even though there is code to
   support the older SSL.

   Various linux+krb5 builds fail because can't find -lgssapi_krb5

   In OpenSUSE 11.2 with OpenSSL 0.9.8r we bomb on undefined references
   from various DES library routines. Builds OK without DES.

   Made new targets for MirBSD, mirbsd and mirbsd+ssl, makefile 15 Jun
   2011.

   Tried to build with Kerberos 5 on Solaris, fails because the DES
   library no longer exists. This one is beyond me, sorry.

   Same deal for the netbsdnc target, now it simply defined NOCURSES and
   chains to the main netbsd target. makefile, 15 Jun 2011.

   Same deal for Kerberos 5, make a new netbsd+krb5 target and it builds
   ok, at least once one figures out where the Kerberos headers and libs
   are. makefile, 15 Jun 2011.

   Tried to build on SCO Open Server 5.0.7 but it fails at link time
   because it can't find rdchk(). But it's supposed to be there! Come back
   to this later...
Red Hat 6.1             i386   32/64   linux          2332545
Red Hat 7.1             i386   32/64   linux          2368528
Red Hat EL4             i386   32/74   linux          2363067
Red Hat EL5.6           i386    64     linux          2371279
Solaris9                sparc  32/64   solaris9       2849896
Solaris9+ssl            sparc  32/64   solaris9       5021764
Solaris10               sparc  32/64   solaris10      2855776
QNX                     i386    32     qnx32          2012323
NetBSD 1.5.1            i386   32/64   netbsd         2198055
NetBSD 5.1              i386   32/64   netbsd         2159863
OpenBSD 2.5             i386   32/64   openbsd        2236036
Mac OS X 10.6.7         x86_64  64     macosx         2.7M
Mac OS X 10.4.11        ppc    32/64   macosx         2496304
Debian 2.1              i386   32/64   linux          2213221
FreeBSD 4.4             i386   32/64   freebsd        2291333
FreeBSD 3.3             i386   32/64   freebsd        2147370
SINIX 5.42              mips    32     sinix542       3319325 (1995)
SCO Unixware 2.1.3      i386    32     uw213          2242176
SCO OSR6.0.0            i386   32/64   sco_osr600     2368300

   More builds, 14 June 2011:
VMS 6.2                 alpha   32     make mn        2556928 No TCP/IP
VMS 6.2                 alpha   32     make m         3112960 UCX 4.0
Solaris 11              i386   32/64   solaris11      2823860
Solaris 11              i386   32/64   solaris11+ssl  2993660 OpenSSL 0.9.8l
NetBSD 5.1              i386   32/64   netbsd+krb5    2307855 Kerberos 5
Linux Slackware 12.1.0  i386   32/65   linux          2175754
Linux Fedora 14         i386   32/64   linux          2256514
Linux Fedora 14         i386   32/64   linux+ssl      ....... OpenSSL 1.0.0d
Linux Fedora 14         i386   32/64   linux+krb      2449614 (*)

(*) make linux+krb5 "LIBS=$LIBS /lib/libk5crypto.so.3 /lib/libcom_err.so.2"

   Noticed that netbsd+ssl build on NetBSD 5.1 said "NetBSD 1.5" in its
   banner. Fixed by replacing the old hardwired target with the new
   "subroutinized" target a'la linux+ssl and adapting it to NetBSD.
   makefile, 15 Jun 2011.

   On FreeBSD 4.4, it blows up with: ckufio.c: In function vpass':
   ckufio.c:8201: conflicting types for 'initgroups'
   /usr/include/unistd.h:154: previous declaration of 'initgroups'
   ckufio.c:8201: warning: extern declaration of 'initgroups' doesn't
   match global one. Fixed by defining NODCLINITGROUPS for FreeBSD in
   ckufio.c. It might not be the right fix, but I don't have a lot of
   other FreeBSD versions to compare with. Anyway now it builds OK on 4.4,
   and also on FreeBSD 3.3. ckufio.c, 13 Jun 2011.

   SuSE 7.0... boots OK but telnet server doesn't work. Can telnet out but
   it's too flaky, connection drops if I try to transfer a file.

   OpenBSD 2.5 [1999] OK. Red Hat 7.1 OK. Red Hat 7.1 with OpenSSL 0.9.6
   not OK, same error as with 0.9.5a:

   ckuath.c In file included from ck_ssl.h:48,
from ckuath.c:225:

/usr/include/openssl/des.h:77: warning: redefinition of `Block'
ckuat2.h:86: warning: `Block' previously declared here
/usr/include/openssl/des.h:83: redefinition of `struct des_ks_struct'
/usr/include/openssl/des.h:91: warning: redefinition of `Schedule'
ckuat2.h:90: warning: `Schedule' previously declared here

   So it appears that OpenSSL support is broken for pre-0.9.7. Tried
   building it again with -UCK_SSL (since the errors are originating from
   from des.h)... But it still failed exactly the same way. I found
   #includes for des.h in ckuath.c and and ck_ssl.h and #ifdef'd them out,
   but it still fails:

   In file included from /usr/include/openssl/evp.h:89,
from /usr/include/openssl/x509.h:67,
from /usr/include/openssl/ssl.h:69,
from ck_ssl.h:51,
from ckuath.c:227:

/usr/include/openssl/des.h:77: warning: redefinition of `Block'
ckuat2.h:86: warning: `Block' previously declared here
/usr/include/openssl/des.h:83: redefinition of `struct des_ks_struct'
/usr/include/openssl/des.h:91: warning: redefinition of `Schedule'
ckuat2.h:90: warning: `Schedule' previously declared here

   Built OK on Debian 2.1. 13 Jun 2011.

   Tried harder to revive the build-all machine, now it sort of works, but
   not all of the bootable OS's work. Built C-Kermit 9.0 OK on OpenBSD
   3.0. Built OK on QNX 4.25 but had to #ifdef references to IXANY in
   ckutio.c and ckupty. Built OK on NetBSD 1.5.1 (2000). Tried "make
   netbsd+ssl" on this one, it's OpenSSL 0.9.5a 1 Apr 2000, but it bombs
   out in ckuath.c, no big deal. Another problem in NetBSD 1.5.2 is that
   even though off_t is 8, CK_OFF_T is 4. Worth noting but not worth
   fixing unless someone else notices. 13 Jun 2011.

   Built OK on AIX 5.3. Built OK on Solaris 10. 11 Jun 2011.

   Tried to resurrect my old SCO Xenix 2.3.4 machine, also headless.
   Amazingly it still works; it can't use a monitor but I can Telnet to
   it. Had to tweak some #ifdefs but I got a no-net version built
   successfully. According to my notes, it hasn't been possible to build
   with TCP/IP since C-Kermit 8.0, but how many people ever had SCO Xenix
   2.3.4 with TCP/IP anyway? Anyway we still have the binaries for
   C-Kermit 7.0. ckuus4.c, 10 Jun 2011.

   Built OK on NetBSD 5.1. 10 Jun 2011.

   Tried to resurrect my old "build-all" machine, an IBM Netfinity 3500
   from 1997 with 20-some mountable bootable hard disks with lots of 1990s
   OS's on them. No dice. I can see the BIOS but not the hard disks. The
   configuration is still correct because it tries to boot from the
   mountable hard disk, but it fails (I tried six different ones).

   Tried to resurrect my old Siemens Nixdorf RM 200 MIPS machine. Booted
   OK, headless even, but makes a hellish high-pitched whine, like a
   dentist drill. It's pretty slow too. "make sinix542" (for SINIX 5.4.2)
   bombed at link time on no rdchk(). Fixed by #including <sys/filio.h>.
   ckutio.c, 10 Jun 2011.

   Built OK on VMS 8.3 on Alpha with Multinet 5.3. The SSL build failed
   but I'm not going to worry about it. 10 Jun 2011.

   Built OK on VMS 8.3 on Alpha, no net. DEC C caught a couple glitches in
   the new code that gcc didn't catch, which I fixed. ckuus[25].c, 10 Jun
   2011.

   Added \q() as an alternative to the more verbose \fliteral() for
   quoting strings that contain characters (like \) that would otherwise
   be significant to Kermit. It's more efficient because it isn't a
   function call, and 'q' is an intuitive letter to mean 'quote'. It also
   works better than \fliteral() because functions treat commas and braces
   specially. ckuus4.c, 10 Jun 2011.

   Noticed that \frecurse() would dump core if called with no arguments.
   Fixed in ckuus4.c, 9 Jun 2011.

   Back to "make linux+ssl" on RHEL5... I took the coward's way out and
   added code to the makefile target to check whether the build worked
   (somebody let me know if there is a better way to check), and if not to
   give a message suggesting they "make clean ; make linux+ssl
   KFLAGS=-UCK_DES". makefile, 9 Jun 2011.

   Added XMESSAGE, which is to MESSAGE as XECHO is ECHO: prints the text
   without a line terminator, so it can be continued by subsequent
   [X]MESSAGE commands. ckuusr.[ch], 9 Jun 2011.

   Renamed all old Mac OS X makefile targets to have the prefix "old" to
   avoid confusing them with the current targets, and made macosx10 a
   synonym for macosx, so those who used previous makefiles will get a
   current target without having to know the new name. makefile, 9 Jun
   2011.

   Documented the SET COMMAND VARIABLE-EVALUATION command, which I added
   in 2008. ck90.html, 9 Jun 2011.

   Changed SET VARIABLE-EVALUATION to SET COMMAND VARIABLE-EVALUATION, but
   left the former version available. ckuusr.c, 9 Jun 2011.

   7 Jun 2011:

   Corrected various #ifdefs (or lack of them) when building C-Kermit with
   different combinations of feature-selection options such as NOCSETS,
   NOICP, NOLOCAL, NOSPL, NOUNICODE, etc. ckcfns.c ckcmai.c ckcxla.h
   ckuus2.c ckuus4.c ckuus5.c ckuus6.c ckuusr.c, 7 Jun 2011. After running
   the script that does all these builds (84 of them) I ran it again to
   make sure that none of the changes broke builds that succeeded before
   the changes were made.

   Built OK on Solaris9 ("make solaris9") Ditto with Krb5 and OpenSSL
   0.9.8q ("make solaris9g+openssl+shadow+pam+zlib")

   Built OK on Mac OS X 10.4.11 ("make macosx"). Also "make
   macosx+krb5+openssl.

   Built OK on Linux RHEL4 ("make linux"). Built OK on Linux RHEL4 with
   OpenSSL 0.9.7a ("make linux+ssl"). Built OK on Linux RHEL5 ("make
   linux").

   "make linux+ssl" fails on RHEL5 because of DES, even though the target
   tests for the presence or absence of the DES libraries. In this case
   the libraries are there but they lack the functions des_ecb3_encrypt,
   des_random_seed, and des_set_odd_parity. The build succeeds as:

make linux+ssl KFLAGS=-UCK_SSL

   Since DES is now considered harmful, Jeff Altman suggests that all
   OpenSSL builds, even for old versions, should omit it ("If you are
   building with openssl and no kerberos or srp, just disable DES.
   Disabling DES will impact telnet and rlogin but it won't matter if you
   have no ability to negotiate a session key").

   From Ian Beckwith, patches for Debian Linux:
     * Change all '-' to '\(hy' in man page (new pedantry): ckuker.nr.
     * Make IKSD authentication (using PAM) ask for a password when an
       invalid username has been given, to avoid disclosing which account
       names are valid: ckufio.c, ckuus7.c.
     * Fix spelling errors: ckcftp.c, ckuus2.c, ckuker.nr, ckcpro.w,
       ckuusr.h.
     * Patch makefile to support install to a staging area with DESTDIR.
     * Some other patches (mainly for typos) were for plain-text
       documentation files that were generated from Web pages; I updated
       the web pages.

   A big corporate C-Kermit user has an application where a local C-Kermit
   makes a connection to a remote one, uploads some files, and then if the
   server has any new patch files for the local, it sends the patches and
   does a REMOTE HOST command to run the patch program. This stopped
   working in C-Kermit 6.0 or 7.0 when I put a check to prevent it,
   because "it makes no sense to send REMOTE commands to the local end,
   because the results are sent back to the remote to be displayed on its
   screen but it has no screen". That may be true, but if the user needs
   to control the local from the remote, they should be able to. I removed
   the checks. This doesn't solve the problem of where the output goes;
   ideally it would go to the local screen but I don't see any elegant and
   simple way to make that change. However the output redirectors can
   still be used with the REMOTE command so the results can be captured to
   a remote file, which could then be sent. ckuus7.c, 7 Jun 2011.

   There were a couple reports of file corruption that I was saving for
   later. Now that now is later I dug up the messages, files, and logs and
   it turns out that nobody had reported a reproducible case of Kermit
   corrupting a file. There have been non-reproducible cases though,
   almost certainly due to corruption of the S or I packet or its ACK,
   which is why we now have SET BLOCK 5. Even with BLOCK CHECK 5, there is
   no guarantee that the same thing won't happen, it is just far less
   likely. Even if we added a 32-bit CRC or even 64-bit one, there would
   still be a small chance it could happen.

   Replaced the very inadequate help texts for functions \fword() and
   \fsplit() with new ones. ckuus2.c, 6 Jun 2011.

   Autodownload didn't work when the S or I packet had a 3-byte block
   check because kstart() checked it for a 1-byte checksum. Fixed in
   kstart(), ckcfn2.c, 6 Jun 2011. However, older Kermit versions and
   programs that claim to do "autodownload" will never recognize this type
   of packet. No big deal since even if they did, the transfer would fail
   anyway.

   Added 'FORCE 3' to E-Kermit, called it EK 1.7. The option is "-b 5".
   Works OK for sending and receiving, both with and without the new
   option. Also works with "-b 5" if you send an S packet to it with '5'
   in the BCT field. Changes were minimal, I have them all in ek17.diff.

   I could probably also make a new G-Kermit in about 10 minutes, but who
   cares about G-Kermit... We already have two useful Kermit programs that
   interoperate with the new protocol. 6 Jun 2011.

   So the various combinations should work as desired:

     * Sender and receiver both support and are told to SET BLOCK 5
       ("SB5").
     * Sender SB5, but receiver doesn't support it (errors out).
     * Sender SB5, receiver supports it but wasn't told (auto-recognizes
       it).
     * Receiver SB5 but sender no (errors out).

   Note in the last case, the receiver should NOT automatically fall back
   to standard behavior because if the user said SET BLOCK 5 that means
   every packet MUST be protected by CRC to prevent the I/S packets from
   being corrupted.

   Installed new HELP SET BLOCK-CHECK text. ckuus2.c, 5 Jun 2011.

   Now the question is: Can we make the file receiver automatically and
   safely recognize a three-byte block check on an incoming S or I packet?
   It's tricky because the block check field is not self-identified, it's
   just the last "n" characters of string indicated by the length field,
   so correct decoding of the packet depends on stateful knowledge of "n".
   How about this: rpack() already knows what type of packet it is, so if
   it's an S or I packet and the 8th byte of the data field is "5" and
   last 3 bytes, when interpreted as the CRC, match the packet contents,
   then we accept the packet and switch to BLOCK 5 mode.

   On the other hand, if the "5" was put there by corruption, the CRC
   should catch the error. In that case we NAK the packet and presumably
   get a different version back. There would be no reason to try to
   re-read the same packet with a different block check, because the "5"
   could not possibly be there legitimately unless it had a 3-byte CRC. To
   be clear, this is cheating. We read the packet contents before we know
   the packet is correct, then we check that it *is* correct. I made the
   4-line change to rpack() and it works OK in the absence of transmission
   errors. ckcfn2.c, 3 Jun 2011.

   Made the file receiver put "5" in the block-check-type in its ACK to
   the S-Packet. spar(): ckcfns.c, 5 Jun 2011.

   Added code to skip the heuristic that S and I packets always have block
   check type 1. File transfer OK between two C-Kermits with SET BLOCK 5.
   rpack(): ckcfn2.c, 5 Jun 2011.

   Added supporting code for SET BLOCK 5: ckcfn[23].c, ckcpro.w, ckcmai.c,
   ckuus3.c, 3 Jun 2011.

   For EM-APEX ocean floats project, where buoys in stormy waters have to
   transmit data through an earth satellite using non-error-correcting
   modems, John Dunlap ran exhaustive stress tests of Kermit protocol
   transfers through a simulated connection that injected errors and
   delays and identified a weakness in Kermit protocol when it is used
   under extremely bad conditions: If a data byte of the S packet (or its
   Ack) is corrupted and the 1-byte checksum is also corrupted in such a
   way that that the checksum matches the corrupted data, the two Kermit
   programs will disagree as to the negotiated parameters. For example, if
   file Sender's RPT field is changed from '~' to '^', the receiver will
   decode the packet incorrectly. Ditto for most of the other parameters.
   The result is that a corrupted file is received but reported correct.
   John suggested a new mode of operation in which the Type 3 block check
   is used for all packets. Such a mode can not be negotiated because the
   negotiation packet itself is assumed by all Kermit programs to have a
   1-byte checksum. Added SET BLOCK-CHECK 5 to the parser (with invisible
   synonym FORCE-3". ckuus3.c, 3 Jun 2011.

   The SET BLOCK CHECK command did not parse all the items in its keyword
   list. Fixed in ckuus3.c, 3 Jun 2011.

   Most combinations work OK, but not translating Cyrillic text from UTF-8
   to Latin/Cyrillic, and probably the same would be true for any case of
   converting from UTF-8 or UCS-2 to anything else. The problem was in
   xgnbyte(), which converts the input stream from the specified character
   to UCS2; it needed to make a special case for when the input file was
   already Unicode. Believe it or not, this problem occurred at least as
   far back as 8.0.201 (9.5 years ago) and nobody noticed. So if the fix
   isn't perfect probably nobody will notice that either. ckcfns.c, 3 Jun
   2011.

   When I added MIME synonyms for Kermit character-set names, I left a
   bogus entry in the tables ("windows-1251") that was in the wrong place
   alphabetically, thus preventing most references to file character-set
   names from working right. Removed the bogus entry. ckuxla.c, 2 Jun
   2011.

   Began converting C-Kermit to Open Source with the Simplified 3-Clause
   BSD license. Updated the text for the INTRO, LICENSE, NEWS, and SUPPORT
   commands. Fixed things so the copyright year to be displayed is defined
   in one place (ck_cryear in ckcmai.c), rather than hardwired into text
   strings all over the place. COPYING.TXT, ckcmai.c, ckuus[256].c, 2 Jun
   2011.

   cksplit() treats \ as a quoting character. If the source string
   contains backslashes, they are swallowed (or, if doubled, one is kept).
   That's not good for parsing external data, such as lines read from
   files, where there are no quoting rules. This came up when parsing CSV
   files; as a workaround, I made \fsplit() treat backslash as an ordinary
   character for CSV and TSV splitting (a better solution might be yet
   another argument that specifies a quote character). ckclib.c, 30 Dec
   2010.

   \fcontents(\&a[3]) got an error if the array was declared but its
   dimension was less than 3, which is bad when dealing with (say) an
   array created dynamically by \fsplit(), which might or might not have a
   third element. In case it doesn't -- i.e. in case we are referring to
   an out of range element of any array that is declared -- we should just
   return a null string, as we do with other types of variables that are
   not defined. For that matter, ditto even if the array is not declared;
   what useful purpose is served by throwing an error in this case?
   ckuus4.c, 30 Dec 2010.

Alpha.09

   A couple minor changes to the tru64-51b makefile targets from Steven
   Schweda but there still are some problems with the Tru64 Unix builds.
   makefile, 21 Sep 2010.

   The Solaris target checked the OpenSSL version automatically to set the
   right flag, the Linux target didn't. Put the OpenSSL-version testing
   code in the Linux target too. makefile, 21 Sep 2010.

   Testing this in Solaris 9 I see that the DES library disappeared. Added
   code to the solaris9 targets (also used by Solaris 10 and 11) to check
   for this. makefile, 21 Sep 2010.

   From Gary Mills at the U of Manitoba: convert Solaris version from BSD
   ptys to streams ptys because there are only 48 BSD-style ptys and he
   was running out. No code changes needed, the only change necessary was
   to add the following flags to the makefile target:

-DHAVE_STREAMS -DHAVE_GRANTPT -DHAVE_PTSNAME
  -DPUSH_PTEM -DPUSH_LDTERM -DPUSH_TTCOMPAT

   makefile, ckcmai.c, 21 Sep 2010.

Alpha.08

   From Joop Boonen 26 Juli 2010: "Added HAVE_LOCKDEV as openSuSE >= 11.3
   uses lockdev but not baudboy. They use ttylock directly. The program
   code has been added so the program works without a problem." makefile,
   ckcdeb.h, ckutio.c, ckuus5.c, 23 Aug 2010.

   The CSV feature of \fsplit() splits a comma-separated list into an
   array. To turn the array back into a comma separated list,
   \fjoin(&a,\44,1) almost works, except for elements contain literal
   doublequotes, such as:

Mohammad "The Greatest" Ali

   This calls for making a symbolic CSV argument for \fjoin() like the one
   that was made for \fsplit(): \fjoin(&a,CSV). Also \fjoin(&a,TSV) for
   Tab-separated list. Thus if Kermit reads a record in CSV format, splits
   it into an array, and then joins the array back into a CSV record, the
   result will be equivalent to the original, according to the CSV
   definition. It might not be identical, because if the result had
   extraneous spaces before or after the separating commas, these are
   discarded, but that does not affect the elements themselves.
   Furthermore it is now possible to convert a comma-separated list into a
   tab-separated list, and vice versa (which is not a simple matter of
   changing commas to tabs or vice versa). ckuus4.c, 12 Aug 2010.

Alpha.07

   The CSV feature of Alpha.06 had a subtle flaw, namely that if the last
   item in a comma separated list was enclosed within doublequotes with a
   trailing space after the closing doublequote, a spurious empty final
   element would be created in the result array. Fixed in cksplit(),
   ckclib.c, 5 Aug 2010.

   Added \fstrcmp(s1,s2,case,start,length), which has the advantage over
   IF EQU,LGT,LLT that case sensitivity can be specified as a function
   arg, and also substrings can be specified. ckuusr.h, ckuus[24].c, 5 Aug
   2010.

   If only one file is FOPEN'd, FCLOSE given with no arguments would close
   it. Turns out to be a bad idea. Example: program with an input and
   output file, try to close the output file before it is opened by just
   typing FCLOSE; this can mess up the input file. For safety FCLOSE has
   to require a channel number or ALL. ckuus7.c, 4 Aug 2010.

   Peter Eichhorn reported that "RENAME ../x ." didn't work. This is a
   side effect of the changes of 2006 to the RENAME command, there was a
   little confusion in the renameone() routine; fixed in ckuus6.c, 4 Aug
   2010.

   From Lewis McCarthy:
  Based on code inspection, C-Kermit appears to have an SSL-related security
  vulnerability analogous to that identified as CVE-2009-3767 (see e.g.
   [77]http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3767).

  I'm attaching a patch for this issue relative to the revision of ck_ssl.c
  obtained from a copy of  [78]http://www.columbia.edu/kermit/ftp/test/tar/x.zip
  downloaded on 2010/07/30, which I believe is the latest.

  When this flaw was first widely publicized at last year's Black Hat
  conference, it was claimed that some public certificate authorities had
  indeed issued certificates that could be used to exploit this class of
  vulnerability. As far as I know they have not revealed specifically which
  public CA(s) had been found issuing such certificates.
  Some references:  [79]http://www.mseclab.com/?p=180
   [80]http://www.theregister.co.uk/2009/07/30/universal_ssl_certificate/

   Patches added to ck_ssl.c, 4 Aug 2010.

   John Dunlap, running days-long stress tests between E-Kermit and
   C-Kermit, found a bug in the packet-reading and -decoding code: If a
   NAK packet arrives with its length field corrupted to indicate a bigger
   size, and there are enough bytes following in the pipeline, ttinl()
   will return a too-long packet (if there are not enough bytes waiting to
   be read, then ttinl() will properly time out). In the bad case rpack()
   trusts the packet length, uses it as the basis for computation of the
   block-check length, which is then used to access memory that might not
   be there, causing (at least on John's Linux system) a segmentation
   fault. John added the normal clause to check the result of the
   block-check calculation, and I changed ttinl() to always break on the
   eol character (normally carriage return), since this can never appear
   in a packet, even if we "set control unprefix all". Also added a check
   to ttinl() to protect against length fields corrupted into illegal
   values. ckcfn2.c, ckutio.c, 13 Apr 2010.

   Changing VNAML from 4K to 16K broke the build on HP-UX 9. Put it back
   to 4K. 9 Apr 2010.

   VMS changes from SMS. They build OK, Kermit file transfers are still
   OK, but FTP text-mode GETs always hang on the 10th 8K network read.
   Couldn't get a debug log this time. ckcmai.c, ckvfio.c, ckvrms.h,
   ckvker.com. 8 Apr 2010.

C-Kermit 9.0 Alpha.06

   Implemented a new \fsplit() option for parsing CSV files, which turns
   out to be a little complicated, because the separator is not just a
   comma, but a comma and all its surrounding spaces. Also there are
   special quoting rules for fields with embedded commas and fields with
   embedded quotes. ckclib.c, 7 Apr 2010.

   Increased maximum variable name length from 4K to 16K. Verified that
   too-long names are caught and recovered from correctly. ckuusr.h, 6 Apr
   2010.

C-Kermit 9.0 Alpha.05

   Did a few builds to make sure there were no booboos. Solaris 9, NetBSD
   5.01, Linux RHEL4, HP-UX 10.20 (non-ANSI compiler and ANSI optimizing
   compiler), Mac OS X 10.4.11, SCO OSR 6.00. 5 Apr 2010.

   Added \fstringtype() function. Given a string argument, it tells
   whether the string is 7bit, 8bit, utf8, binary, etc. ckuusr.h,
   ckuus[4x].c, 2 Apr 2010.

   Changed the IF command to accept a bare macro name its condition. This
   will parse and execute correctly if the macro is defined and if it has
   a numeric value, or if it is not defined, in which case it evaluates to
   0 (FALSE). If it is defined but has a non-numeric value, a parse error
   occurs. ckuus6.c, 2 Apr 2010.

   Added MIME character-set names as invisible synonyms in the file and
   terminal character-set tables, fcstab[] and tcstab[]. Note that not all
   the character sets known to Kermit are registered in MIME. But at least
   now MIME-registered character sets can be referred to by their MIME
   names, e.g. ISO-8859-1, ISO646-ES, IBM437, WINDOWS-1252. These are not
   listed if you type ? in a field that is parsing them, unless you type a
   letter first, e.g. "i?" lists ISO- and IBM set names. Later maybe I'll
   make parallel tables, or keyword attribute bit that says whether a name
   is MIME or not. The real benefit of this change is that now Kermit can
   take its character-set names from external sources like email headers
   or web logs. ckuxla.c, 1 Apr 2010.

   Build on Solaris 11 for the first time. Had to adjust ckuver.h to get
   the version herald right. This was on a box that reported its
   architecture as i86pc. 1 Apr 2010.

   Richard Nolde reports that Kermit can't find -lpam on Fedora 12 because
   it's in /lib rather than /usr/lib. RHEL5 has symlinks, FC12 should too.
   Added a note to the makefile. 1 Apr 2010.

   Added a new function \fdecodehex(string,prefix) that decodes a string
   containing prefixed hex bytes. Default prefix is %%, but any prefix of
   one of two chars (such as % or 0x) can be specified. ckuusr.h,
   ckclib.h, ckclib.c, ckuusr.c, 31 Mar 2010.

   Added a new function \fcvtcsets(string,cset1,cset1) that converts a
   string from one character set to another. The csets are File
   Character-Set names. ckuus4.c, 31 Mar 2010.

   A fix to Trusted HP-UX makefile target from PeterE, to account for the
   equivalence of +openssl and +ssl as target suffixes. 30 Mar 2010.

   Fixed mistaken extern declarations of krb4_errno and krb5_errno as
   strings in nvlook(); they are ints. Built OK on Mac OS X 10.6.3.
   ckuus4.c, 30 Mar 2010.

   The change I made to allow CONNECT to reestablish a previous SSH
   connection prevented a new SSH connection to a different host to be
   made. Fixed in ckuus7.c, 30 Mar 2010.

   Changed VOID and CKVOID definition to be 'void' for all HP-UX (verified
   by PeterE back to HP-UX 6.5, 1989). Still need to check this on HP-UX
   5.21; if that's an exception it can be done in the makefile. ckcdeb.h,
   30 Mar 2010.

   Yesterday's VOID redefinition caused problems for HP-UX in ckuusx.c, in
   the curses section where VOID is undef'd and not used to avoid a
   conflict with curses.h. As a workaround I defined a new macro CKVOID
   with the same definition as VOID and used it in the offending section
   of ckuusx. The real solution is to replace all references to VOID with
   CKVOID (since VOID is increasingly likely to cause conflicts), but a
   mass search and replace is not without risks. ckcdeb.h, ckuusx.c, 30
   Mar 2010.

C-Kermit 9.0 Alpha.04

11:23:10.722 ftp_hookup[kermit.columbia.edu]=21
11:23:10.722 ftp hookup A[kermit.columbia.edu]
11:23:10.722 ftp hookup C[kermit.columbia.edu]
11:23:10.722 ftp hookup socket=4
11:23:10.722 ftp hookup HADDRLIST
11:23:10.723 ftp hookup connect failed=13
11:23:10.723 ftp hookup bad

   13 = Permission denied:

[EACCESS] Search permission is denied for a component of the path prefix;
  or write access to the named socket is denied.

   On Gentoo Linux, also on Alpha, the errno is 51: Network is
   unreachable. Clearly some data type in the sockets structs is out of
   whack.

   The third connect() argument is "address length". The address is a
   struct sockaddr. About the third argument, RHEL5 "man connect" says:

  The third argument of connect() is in reality an int (and this is what
  4.x BSD and libc4 and libc5 have).  Some POSIX confusion resulted in
  the present socklen_t, also used by glibc.  See also accept(2).

   Building on RHEL5 on x86_64, where size_t is 8 and socklen_t is 4, I
   get a warning:

ckcftp.c: In function 'ftp_hookup':
ckcftp.c:14667: warning:
  comparison is always true due to limited range of data

   Referring to:

if (hisctladdr.sin_addr.s_addr != (unsigned long) -1)

   This seems to be the problem; if I remove the (unsigned long) cast (in
   two places), the problem goes away. Actually what I should be comparing
   it with is INADDR_NONE, which is defined appropriately in some header
   file, e.g. as 0xffffffff. Also I define it explicitly as -1 if it is
   not defined in any header file (as is the case in Solaris 9). Tested OK
   on 64-bit RHEL5, 32-bit RHEL5, Digital Unix 4.0E 64-bit, Solaris 9
   32-bit, Mac OS X 10.4.11 32-bit, Mac OS X 10.6.3 64-bit, AIX 5.3,
   Gentoo Linux 2.6.31 on Alpha 64-bit, NetBSD 5.0.1 32-bit.... ckcftp.c,
   29 Mar 2010.

   connect(s, (struct sockaddr *)&hisctladdr, sizeof (hisctladdr)): In
   FTP, this doesn't work on RHEL5 / Mac OX X 6.1/2 64-bit. But the
   connect() in Telnet works. On Mac OS X 6.2 I tried changing the
   socket() call to be like the one in ckcnet.c for Telnet, but it made no
   difference. On a RHEL5.4 system on i386, FTP works fine, so it's not
   the Red Hat version. On Digital Unix 4.0E 64-bit, same thing:

   There are various warnings in the SSL code in ckutio.c, ckcftp.c, and
   ckcnet.c about pointers not being assignment compatible, but I have
   learned from experience not to try to fix these (see notes from 6 Oct
   2009). 29 Mar 2010.

   "make hpux1000o+ssl" files with: /usr/ccs/bin/ld: Unsatisfied symbols:
__umoddi3 (code)
__udivdi3 (code)
__eprintf (code)

   It appears that OpenSSL (0.9.7c in this case) requires -lgcc. And
   indeed hpux1000gcc+ssl builds fine. 29 Mar 2010.

   Ditto in tls_load_certs(). ck_ssl.c, 29 Mar 2010.

   Fixed a typo in a debug() statement in cksplit() that was causing some
   warnings. ckclib.c, 29 Mar 2010.

   In HP-UX with the bundled-non ANSI compiler, we get warnings about
   functions such as endusershell(), which are declared void in the header
   files. But in non-ANSI builds we defind VOID to be int rather than
   void, so our prototypes are wrong. I checked that HP-UX 9, 10, and 11
   all have void datatype and changed the definition of VOID to void in
   those cases. ckcdeb.h, 29 Mar 2010.

C-Kermit 9.0 Alpha.03

   Changed hexdump() to ckhexdump() in ck_crp.c, which I missed before. 19
   Mar 2010.

   Built OK on VMS 6.2 and 8.3 with and without networking. Large file
   support included automatically in VMS 8.3 FTP client included
   automatically in both network builds. 19 Mar 2010.

   From SMS: updated dependencies in CKVKER.COM, fix the "don't reinclude
   me" clause in CKVRTL.H. 19 Mar 2010.

   Changed VMS build procedure to include the FTP client in any network
   build by default. Changed the sense of the I option to exclude the FTP
   client, in case anybody would want to do that. ckvker.com, 18 Mar 2010.

   Changed the VMS build procedure to enable large file support
   automatically for non-VAX and VMS 7.3 or greater. No reason not to
   include this feature. Changed the sense of the F option to DISABLE
   large file support in the unlikely case that C-Kermit is being built on
   a suitable platform but the C library is older than VMS73_ACRTL-V0200,
   in which case fseeko() and ftello() will come up missing at link time.
   ckvker.com, 18 Mar 2010.

   From SMS: #include <types.h> earlier for VMS in ckcdeb.h to pick up
   off_t before it is referenced. This allows C-Kermit to compile on
   VMS/Alpha 6.2 but linking fails on fseeko() and ftello() (and yet, a
   functional executable is created, and FSEEK works right). Builds the
   same way with no problems at all on VMS 8.3 / Alpha. In this case we
   get the full 64-bit arithmetic... Well, 62 bits:

ATLAS::C-Kermit>( ^ 2 63)
   9223372036854775000.0
ATLAS::C-Kermit>( ^ 2 62)
   4611686018427387904

   whereas on VMS 6.2 we get integers only up to (^ 2 30). 17 Mar 2010.

   From SMS: Corrections to my merging of SMS's changes, ckcftp.c,
   ckvrtl.h. Builds OK on VMS 6.2 now. Also did an SSL build on VMS 8.3
   with OpenSSL m0.9.7e and "OPENSSL_DISABLE_OLD_DES_SUPPORT" was included
   in P3 automatically by Martin V's addition to ckvker.com. 17 Mar 2010.

   To go with MESSAGE and SET DEBUG MESSAGE, I added IF DEBUG, which is
   true if SET DEBUG MESSAGE is not OFF and false otherwise. ckuusr.h,
   ckuus6.c, 16 Mar 2010.

   Tried again to build Digital Unix Tru64 4.0E using "make tru64-40e",
   but something prevents it from picking up the termios symbols and it
   blows up in ckutio.c, whereas this used to work in earlier C-Kermit
   versions. This is the only Tru64 system I still have access to, so I
   can't tell if it's a local peculiarity or what. Note that POSIX is not
   defined for this build. But if I define it, I get into trouble with
   "struct timeval". Tried again with "KFLAGS=-DPOSIX -DNOTIMEVAL" but
   that doesn't help. Tried "make dec-osf" and that worked OK but oddly
   enough it makes a Kermit with less features than "make osf". 16 Mar
   2010.

   Built OK on Digital Unix Tru-64 4.0E using "make osf", 16 Mar 2010.

   FreeBSD 8.0 <libutil.h> has a hexdump() prototype that conflicts with
   the hexdump macro defined in ckcdeb.h. Since the same thing is likely
   to happen elsewhere, I changed the Kermit macro to ckhexdump as well
   all references to it: ckcdeb.h, ckcftp.c, ckcnet.c, ckctel.c, ckuath.c,
   ckutio.c, 16 Mar 2010.

   More from SMS for VMS, 16 Mar 2010:
     * Set MAXPATH correctly for VMS, ckcdeb.h.
     * NAM -> NAML, QIO replaces system( "SET PROTECTION"), bugfixes in
       cvtdir() and nzltor(), ... (See comments): ckvfio.c, new ckvrms.h.
       (The RMS code in ckvfio.c was almost totally rewritten)
     * Moved "NAMX$*" (and related) macros to ckvrms.h, and renamed to
       "NAMX_*" (and similar "$" -> "_"), moved "FIB_*" macros from
       ckvrtl.c.

   These changes are mainly to accommodate the ODS5 file system, which has
   longer and mixed-case filenames, and also to execute certain commands
   (e.g. for setting file protection, deleting directories) directly
   instead of using a system() command.

   Built OK on VMS 8.3 (with and without network support). 16 Mar 2010.

   Failed to build on VMS 6.2. 16 Mar 2010.

   Not so good on VMS, turns out I made a typo in one of the VMS updates
   (#ifndef OLDIP instead of #ifdef...). ckcnet.c, 16 Mar 2010.

   Built OK on Solaris9, Mac OS X 10.4.11, RHEL4 (32-bit), RHEL5 (64-bit),
   AIX 5.3, SCO OpenServr 6.0.0... 15 Mar 2010.

   Exposed inesc[] and oldesc[] for VMS, so new INPUT command
   escape-sequence stripping can work (really, chkaes() and related global
   variables should be moved out of ck[uvd]con.c/ckucns.c and into a
   common module; do that later). ckuusr.h, ckvcon.c, 15 Mar 2010.

   From SMS for VMS: 'Added/documented P3 options INTSELECT, OLDFIB,
   OLDIP. Disabled (commented out) automatic definition of NOSETTIME for
   VMS before V7.2 (vms_ver .lts. "VMS_V72").' ckcdeb.h, ckcftp.c,
   ckcnet.c, ckuus[2567].c, ckvfio.c, ckvker.com, ckvrtl.[ch], 15 Mar
   2010.

   Also for debugging and error messages, I added \v(lastcommmand) so that
   the command that failed can be included in an IF FAIL or DEBUG error
   message. This works even for commands that have syntax errors.
   ckuusr.h, ckuus5.c, ckucmd.c, 12 Mar 2010.

   There has never been a clean way to put debugging messages (ECHO
   commands) in a script which are executed only if debugging is desired
   and ignored otherwise. You'd have to set a random variable and test it,
   or define a macro or whatever. To make this more straightforward, I
   added SET DEBUG MESSAGE ON/OFF/STDERR, and added a new MESSAGE (syn:
   MSG) command for printing debugging messages to stdout if SET DEBUG
   MESSAGE is ON or to stderr if SET DEBUG MESSAGE is STDERR. ckcmai.c,
   ckuus[r23].c, 12 Mar 2010.

   Peter Eichhorn complained that if you make an ssh connection with
   Kermit, then log out from the ssh host, and then use a "connect"
   command to make a new connection to the same host (which you can do
   with Telnet), Kermit says (e.g.):

 DNS Lookup... Can't get address for ssh -e none somehostname
 Sorry, can't open ssh -e none somehostname: Error 0

   I added code to detect and handle this case and it seems to work OK,
   even though it's kind of a hack. ckuusr.[ch], ckuus7.c, 1 Mar 2010.

   Added code to INPUT command to strip ANSI escape sequences. It's
   activated by SET SESSION-LOG TEXT. ckuusr.h: added prototype for
   chkaes(); ckucon.c, ckucns.c: made inesc[] and oldesc[] global instead
   of static; ckuus4.c: doinput() code for skipping escape sequences. 1
   Mar 2010.

   From Martin Vorlaender: new code in VMS C-Kermit build procedure to
   detect OpenSSL version automatically. ckvker.com, 22 Feb 2010.

   Moved the #include "ckvrtl.h" in the FTP module to below the include
   for utime.h, because building the VMS version with the 'i' option
   (meaning "include internal ftp client") results in "struct utimbuf tp"
   erroring out because struct utimbuf is not defined yet (at least in
   some version of VMS with some version of C). From Rob Brown, ckcftp.c,
   20 Feb 2010.

   Added note to CKVKER.COM to the effect the 'f' option has no effect on
   VAX architecture. 15 Feb 2010.

   Tried to build on a real VAX-11/785 but the machine seems to be
   seriously wedged. 12-15 Feb 2010.

   Built on VMS E8.4. 12 Feb 2010.

   In ckupty.h, make the #include <sys/ioctl.h> be #ifndef SUNOS41. From
   Christian Corti. 10 Feb 2010.

   Added an aixg target to build on AIX with gcc when gcc is not installed
   as cc, and also added CC=$(CC) CC2=$(CC) clauses to the aix and aix+ssl
   targets. Wow, AIX really loses bigtime when receiving files through its
   ssh server. Streaming can't be used, sliding windows recover from
   errors but there are tons of them using the default 4K packets; 500
   works much better. Built with IBM cc and gcc, and also tested
   (successfully) the new aix+ibmssl target, in which the OpenSSL headers
   and libs are in a standard place. makefile, 9 Feb 2010.

   From John Dunlap, a fix for Kermit protocol fixed packet-timeout
   interval going to a unexpected value (missing else clause in two
   places). ckcfn2.c, 9 Feb 2010.

   From Christian Corti at Uni-Stuttgart.de: fixes to allow building on
   SunOS 4.1, which once was my main development platform but which is
   long-gone from here. ckupty.c, ckutio.c, 9 Feb 2010. (He says it is
   also necessary to comment out the "struct winsize" and "struct ttysize"
   in sys/ioctl.h; otherwise there will be a conflict with sys/ttycom.h
   (included by termios.h) which also declares these structs. But you need
   both includes.')

C-Kermit 9.0 Alpha.02

   Built OK on Minix, Linux, Mac OS X, Solaris 9, NetBSD 5.0.1... 1 Feb
   2010.

   Later.. Andy says MINIX does not support job control, so no program is
   ever in the background. That settles that! 1 Feb 2010.

   Adapted to MINIX 3 1.5, the first version that has virtual memory
   according to Andy T, who should know. On earlier versions (e.g. MINIX 3
   1.2) any attempt to build C-Kermit causes the compiler to crash. Now
   the compiler doesn't crash but it spews out countless warnings about
   old-fashioned function declarations that I don't get anywhere else. The
   real problems came in ckutio.c where numerous symbols were undefined at
   compile time and the POSIX function tcgetpgrp() was not found at link
   time, even though there is a prototype for it in the MINIX header
   files, and there is no alternative (since POSIX doesn't let us use
   ioctl()). Also note that there is some confusion over the compile-time
   symbols MINIX, MINIX2, MINIX3, and MINIX315. You would expect MINIX to
   mean "any version of MINIX" but in some parts of ckutio.c it means
   MINIX 1.0. I sincerely doubt that C-Kermit 9.0 can be built on any
   version of Minix before 3.1.5 so I removed the confusion and made MINIX
   mean "any Minix". It builds on 3.1.5 OK now, except for the FTP client.
   This can probably be fixed but... Modules changed: ckcdeb.h, ckuver.h,
   ckcmai.c, ckuus5.c, ckutio.c, 1 Feb 2010.

   Set NO_KRB5_INIT_ETS by default in ckuath.h since krb5_init_ets() is a
   no-op in Kerberos 1.4.x and later and in some installations it can't be
   found, which clobbers the build. ckuath.h, 27 Jan 2010.

   Added SSL, KRB4, and KRB5 to the startup herald for versions that were
   built with SSL, Kerberos 4, or Kerberos 5. Built OK on Fedora 3 with
   linux+krb5+ssl and new banner shows correctly. ckuus5.c, 27 Jan 2010.

   Built on Linux Fedora Core 3, regular and with OpenSSL 0.9.7a. Built on
   Ubuntu 9.4 OK, but SSL and Kerberos builds failed due to not finding
   libs and/or header files. I'm sure this could be fixed... 27 Jan 2010.

   Changed the year from 2009 to 2010 in the modules I worked on today and
   in the heralds, etc. ckckmai.c, ckuus5.c, ckutio.c, ckclib.c, ckuus7.c,
   26 Jan 2010.

   Speaking of CSV files... How can you put comma as a function argument
   when comma is the function-argument separator? Use one of these forms:

\fsplit(\m(xx),&a,",",ALL)
\fsplit(\m(xx),&a,{,},ALL)
\fsplit(\m(xx),&a,\44,ALL)
\fsplit(\m(xx),&a,\fchar(44),ALL)

   From John Dunlap, U. of Washington Applied Physics Lab: 'When "stty -a
   < /dev/ttyS0 | grep crtscts" shows "crtscts" (not "-crtscts") and when
   using a three wire serial interface and when asking kermit to not use
   flow control (set flow none) then "ckutio.c1" (see attachments) fails
   while "ckutio.c" works. The result of "diff -u ckutio.c1 ckutio.c" is
   attached as "diffs"'. ckutio.c, 26 Jan 2010.

   \fword() and \fsplit().... Another change, but not
   backwards-incompatible. One may now put the word ALL (just like that,
   all uppercase) as the include set (4th argument) to indicate that there
   will be no break characters other than those explicitly given in the
   break set, e.g. \fsplit(\m(xx),&a,:,ALL) breaks a line only on a colon
   (:), nothing else. The original rules for cksplit() were more than a
   little counterintuitive: the default break set is all non alphanums,
   and the default include set is all alphanums, so if you wanted to parse
   (say) a CSV file, breaking only on comma, you had to think of all the
   characters you wanted to keep. This way you just say ALL. ckclib.c, 26
   Jan 2010.

   FSEEK failed to find anything if the search pattern was matched in the
   first line of the file. Fixed in ckuus7.c, 26 Jan 2010.

   FSEEK did not pay attention to SET CASE, searches were always case
   sensitive. Fixed in ckuus7.c, 26 Jan 2010.

   Discovered that the result returned by \fsearch() is totally
   unreliable. This is probably too hard to fix.

   Added some essential details to the HELP FSEEK text. ckuus2.c, 25 Jan
   2010.

   Built on VMS 8.3 with "make fi" to include the FTP client and long-file
   support (mid Jan 2010).

   Built on VMS 8.3 with UXC 5.6 and HP SSL 1.3, which is OpenSSL 0.9.7e.
   It compiled and linked OK but when I tried to make an FTP SSL
   connection it crashed in SSL$LIBSSL_SHR, which is called from
   ssl_auth(), after having had TLS accepted as an authentication type,
   but before actually authenticating. In Unix:

9. ftp open ftp.somecompany.com /user:pge.com/test_quota /password:xxxxxx

Connected to ftp.somecompany.com.
220-Somecompany FTP v6.0 for WinSock ready...
220 Welcome to the online storage FTP server.  Please check the main web
site for system announcements and AUP. (O)
---> AUTH TLS
234 AUTH command OK. Initializing SSL connection.
TLS accepted as authentication type
SSL DEBUG ACTIVE
=>START SSL/TLS connect on COMMAND

   In VMS:

19. ftp open ftp.somecompany.com /user:pge.com/test_quota /password:xxxxxx

   Connected to ftp.somecompany.com. 220 Somecompany FTP v6.0 for WinSock
   ready... ---> AUTH TLS 234 AUTH command OK. Initializing SSL
   connection. TLS accepted as authentication type SSL DEBUG ACTIVE
   %SYSTEM-F-ACCVIO, access violation, reason mask=04, virtual
   address=FFFFFFFF8001A120, PC=000000000068B118, PS=0000001B

   Note: The Unix version received the second 220 response, the VMS
   version did not. That's odd, it's the same code... 25 Jan 2010.

   Built on VMS 7.2 and 8.3 with and without TCP/IP, no problems. 11 Jan
   2010.

   (Various other successful Unix builds in these weeks...)

   Built OK on MirBSD 10, despite a lot of gratuitous compiler warnings.
   Built OK on MirBSD 10, OpenBSD 4.5, and Fedora 10. 3 Dec 2009.

   Built OK on Digital Unix 4.0F using "make osf" instead of "make
   tru64-40f". I don't know why the specific target doesn't work, but it's
   not worth chasing down. 2 Dec 2009.

   Built OK on Linux RHEL5.4/Itanium-2, make linux. The secure build
   required "FLAGS=-DNO_KRB5_INIT_ETS" and built OK. 30 Nov 2009.

   Tried to build on Digital Unix 4.0F but it blew up in ckutio.c,
   apparently not recognizing any of the terminal struct symbols from
   termios.h. Tried again with gcc, same thing. Tried explicitly
   #including <sys/termios.h> within #ifdef TRU64, same thing. What could
   have changed? 30 Nov 2009.

   Built OK on Silicon Graphics IRIX 6.5 R10000; regular build OK, SSL and
   Kerberos builds failed. 30 Nov 3009.

   It could simply be that some of the buffers we allocate are much bigger
   now. But again, I don't see much difference between 8.0.211 and 9.0; we
   were already allocating 32K command-related buffers (malloc() takes a
   size_t, and size_t is an int almost everywhere). I built the same
   source on NetBSD and ran the same script (with \fqueeze()), and it
   worked fine. Let's worry about this later, if it comes up. 27 Nov 2009.

   Another problem is that when this happens, the error is not caught
   (e.g. by the IF FAIL statement after the command that contains the
   function call); instead, C-Kermit returns immediately to its prompt. 27
   Nov 2009.

   I wrote a Kermit script to read a big file of addresses on Solaris 9,
   \fsqueeze()ing each line. After about 14000 lines, there was a malloc
   failure in getnct() (the command-file reader). There's nothing wrong
   with \fsqueeze(), the failure is on a deeper level, because the same
   thing happens if I use \fupper() (which is structurally identical to
   \fsqueeze()) in the same script. The problem is not in getnct() either,
   because every malloc() is freed (I checked). On the other hand, the
   same script (with \fupper() instead of \fsqueeze() completes OK in
   C-Kermit 8.0.201. If I remove the function call (\fsqueeze() or
   \fupper()) from the script, it also runs OK in 9.0. This seems to point
   the finger at fneval(), which contains countless malloc's and free's.
   But comparing fneval() between 8.0.211 and 9.0, I don't see any
   difference that would explain this behavior -- nothing at all that
   involves malloc(), makstr(), or free(). Nor any pertinent change in the
   caller (zzstring) of fneval(). 27 Nov 3009.

   Added \fsqueeze(s), returns string s with leading and trailing
   whitespace removed, Tabs converted to Spaces, and multiple spaces
   converted to single spaces. For now, ASCII only, no options. ckuusr.h,
   ckuus[24].c, 27 Nov 2009.

   From Gerry Belanger, a fix to INPUT /COUNT:n. ckuus4.c, 26 Nov 2009.

   Rediscovered the new VMS build options: f for Long Files, i for
   Internal FTP. "make mnf" doesn't work on VMS 6.2, it looks like the VMS
   definition for CK_OFF_T got lost. Same thing with "make mfi". Come back
   to this later.

   From Steven Schweda (SMS), the real solution for the VMS closing brace
   problem, it wasn't a DECC bug, it was a me bug. ckuusy.c, 20 Nov 2009.

Kermit 9.0 Alpha.01

   I found a VMS 6.2 system... Takes a loooong time to build there. In
   ckuusy.c, DEC C didn't like the prototypes and declarations of
   dorlgarg() and dotnarg() as static so I made them not static. But that
   didn't help, now it fails at the very end, saying the final #ifdef is
   an invalid statement. It looks like an #ifdef mismatch that affects
   only VMS. I ran my #ifdef matcher, it turned up nothing. I substituted
   a copy of ckuusy.c from 2007, it comes up with the same errors. Then I
   substituted the copy from 8.0.211 from 2004, and this one compiled OK
   and, miraculously, the whole mess even linked OK and runs OK. The Alpha
   binary is 2.84MB. Now I have 4500 lines of code to compare.... I went
   through the two files line by line and I can't see a single thing
   wrong. I gave up and tried building the TCP/IP version. It builds fine
   except for ckuusy.c, with the utterly useless error message:

#endif /* NOCMDL */
...................^
%CC-E-BADSTMT, Invalid statement.

   Indicating the last line in the file. Just for the heck of it, I put
   another line after that one:

/* This is a test */

   and got:

/* This is a test */
....................^
%CC-E-BADSTMT, Invalid statement.

   So it is not objecting to anything in the file. Trying the old LISP
   trick, I put an extraneous closing bracket after that. Success!
   Honestly, I don't see anything wrong with file. It's DEC C V5.3-006. I
   suspect a C bug. I'll leave it like this for now until I get access to
   some other VMS versions. Another clue is that when building the network
   version I get a horrible warning I never saw before from a module that
   hasn't been touched in a very long time (ckvrtl.c). Also, in the
   network version, I note that the FTP code is not compiled in. We have
   to try this again with some command-line switches, but it'll do for
   now. ckuusy.c, 18 Nov 2009.

   Built on NetBSD 5.0.1 with and without OpenSSL, all OK, but netbsd+krb5
   fails with "can't find -lgssapi_krb5"; worked around this with
   "K5LIB=-L/usr/local/kerblib" (where the lib actually is on this host)
   but then it failed with "ckcftp.c:13868: error: 'gss_nt_service_name'
   undeclared". 17 Nov 2009.

   Built on FreeBSD 7.2 with and without OpenSSL, all OK. 17 Nov 2009.

   Made sure the current source package builds OK on HP-UX 10.20... Got a
   lot of "warning 6062: Optdriver: Exceeding compiler resource limits in
   xxx; some optimizations skipped. Use +Onolimit if override desired" but
   it builds OK. Tested long file transfer; works OK. 17 Nov 2009.

   Made sure the solaris9_64 and solaris10 targets still work. 16 Nov
   2009.

   Changed macosx targets to get the CPU type from the HOSTTYPE
   environment variable. Also added getenv("HOSTTYPE") as a last-resort
   method to set the \v(cpu) variable at runtime (maybe it should be the
   first resort?)... ckuus4.c, makefile, 16 Nov 2009.

   Changed the netbsd target to set -funsigned-char, since cc on NetBSD is
   actually gcc. makefile, 16 Nov 2009.

   \fsplit() and \fword() always break on 8-bit characters unless you
   explicitly put every single 8-bit value into the include set, e.g. (for
   a TSV file):

undef include
for \%i 128 255 1 {
    if == \%i 9 continue
    .include := \m(include)\fchar(\%i)
}
.\%n := \fsplit(\m(line),&a,\9,\m(include))

   I changed cksplit() to treat all 8-bit bytes 128-255 as non-break
   characters by default. It might have made more sense to do this for
   160-255 (since 128-159 are traditionally C1 control characters) but
   thanks to Microsoft tradition is out the window. To treat one or more
   8-bit characters as break characters, put them in the break set. This
   might break some scripts, but I doubt it because this flaw was so awful
   that if anyone had come up against they would have let me know.
   ckclib.c, 16 Nov 2009.

   Added REJECT as a synonym for DISCARD in SET FILE COLLISION; it's more
   intuitive and more accurate. ckuus[27].c, 15 Nov 2009.

   Fix from Seth T. for an oversight in the previous edit. Also add
   MACOSX103 to "show features" display. makefile, ckuus5.c, 10 Nov 2009.

   Changed Mac OS X targets to correctly extract the Mac OS major version
   from uname -r in order to choose correctly between utmp and utmpx; this
   wasn't working in 10.6.1. makefile, 6 Nov 2009.

   Peter Eichhorn reported that file-transfer failure hints were not
   coming out since Dev.27. The only change I made since then was to skip
   them if the file-transfer protocol was not Kermit. I was using the
   wrong variable in the tests, 'proto' instead of 'protocol'. ckuus5.c, 6
   Nov 2009.

   From Seth Theriault, a better way for the makefile to determine the Mac
   OS X version number; there's a program for this, sw_ver. makefile, 6
   Nov 2009.

   If a series of PUTENV commands is given, each new one undoes the
   previous one, so only the last definition is seen by the new fork (or
   by Kermit itself). Turns out you can't feed automatic variables to
   putenv(); they have to be static, so to allow for multiple PUTENV
   commands Kermit has to maintain an array of static strings. ckuus7.c, 6
   Nov 2009.

   Changed SHOW LOG to show the SET SESSION-LOG settings, as well as SET
   DEBUG, which was not shown before. ckuus5.c, 22 Oct 2009.

   Changed SET SESSION-LOG TEXT to strip out ANSI escape sequences;
   previously there wasn't that much difference between TEXT and BINARY
   logs. It's still not perfect; for example it doesn't delete characters
   that the user erased. (Made sure this still builds with -DNOESCSEQ.)
   ckucns.c, 22 Oct 2009.

   I made -DNOUUCP the default for Mac OS X, since everybody winds up
   building it that way anyhow. To undo this, do "make macosx
   KFLAGS=-UNOUUCP". makefile, 21 Oct 2009.

   Need to make LOG SESSION log to a tty. Right now "log session
   /dev/ttyKeySerial1" says "Write permission denied" even though the
   device is crw-rw-rw-. This happens in zchko(), which is called by
   cmofi(). The problem is that /dev/ is not writeable. I added a
   Unix-only clause that attempts to open the file for write access using
   open(), in order to get a file descriptor, which then can be passed to
   isatty() to check if it's a tty, and if so, to allow access. And then
   close it. I tested this on Mac OS X as follows:

log session /dev/ttyKeySerial1
telnet somehost

   The Mac's serial port was connected to the serial port of another
   computer where Kermit displayed the incoming characters in CONNECT
   mode. Glitches:

 1. The port has to be set up as desired in advance, outside of Kermit.
 2. log session /dev/ttyKeySerial1 will hang if any required modem signals
    are not present when the port is opened.
 3. Bypasses lockfile mechanism - so we do this only if -DNOUUCP.

   For (2), I tried setting O_NDELAY / O_NONBLOCK, and this allowed
   zchko() to continue, but then it freezes in the subsequent fopen(). So
   I changed zopeno() to also check if the device is a serial port, and if
   so, to open() it with O_NDELAY / O_NONBLOCK, and then convert the file
   descriptor into a file pointer with fdopen().

   Now for the speaking device that needs lines to be terminated by NUL...

set session-log binary       <-- need to put these in SHOW LOG
set session-log null-padded      (and in HELP SET LOG)
set line /dev/ttyKeySerial1

   This part works.

   This feature is enabled only for -DNOUUCP builds because serial ports
   aren't like other Unix files; we would have to create a lockfile, but
   we can't do that... actually, ttlock() takes a name as an argument, but
   ttunlck() does not, so there would be no way to remove the lock.
   Anyway, there is only one API for configuring the port (speed, flow
   control, etc) and it only works with the SET LINE device, not any
   random file. To fix this would require massive redesign and changes.
   ckuus[23].c, ckufio.c, 19-20 Oct 2009.

   Changed version number to 9.0. All modules, 16 Oct 2009.

   After all that, 86 different combinations of feature selections built
   OK on Linux. And the Kerberized version (K5) works OK on Linux for
   Telnet and FTP. 14 Oct 2009.

   There was some confusion between "No XYZMODEM" and "No external
   protocols"; cleared up in ckuus3.c, 14 Oct 2009.

   SHOW PROTOCOL code for external protocols had to be #ifdef'd out for
   -DNOPUSH builds. ckuus4.c, 14 Oct 2009.

   COPY /PRESERVE depended on code from the Kermit protocol module, which
   is omitted in -DNOXFER builds. Disabled COPY /PRESERVE in -DNOXFER
   builds. ckuus6.c, 14 Oct 2009.

   Moved havelfs declaration outside of #ifdef NOXFER because it was also
   used for other things. ckcmai.c, 13 Oct 2009.

   Moved doputenv() and settermtyp() out of an #ifdef NOLOCAL section
   because these are useful even when not making connections. ckuus7.c, 13
   Oct 2009.

   There was a reference to doputenv() that wasn't guarded by #ifndef
   NOPUTENV, fixed in ckuus7.c, 13 Oct 2009.

   Fixed an #endif /* TNCODE */ that was a line too low in ttptycmd(),
   causing -DNONET builds to fail. ckutio.c, 13 Oct 2009.

   Protected cvtstring() and related functions with #ifdef
   NOCSETS..#endif, and ditto for the character-set conversion code in
   dorename(). ckuus6.c, 13 Oct 2009.

   Next issue: Can't compile ckcftp.c with -DNOCSETS or -DNOSPL; some
   #ifdef/#endif doesn't match up. Sigh, this is the hardest kind of thing
   to debug. There's 17,622 lines of code in this module and no tool that
   I know of.... Wait, I wrote one. But it shows all the
   #if/#ifdef/#ifndef's and #endifs matching up just fine. Backing off to
   ckcftp.c of a few days ago (before char / unsigned char casts were
   added), I see that it builds OK, so I backed off to that one, but put
   back the special case #ifdef for MACOSX103 declaring CONST
   gss_OID_desc, and it builds OK (the other stuff was purely cosmetic,
   when will I learn?). ckcftp.c, 13 Oct 2009.

   Next issue:
In file included from ckutio.c:15674:
/usr/lib/gcc/i386-redhat-linux/3.4.6/include/varargs.h:4:2: #error "GCC no
 longer implements <varargs.h>."
/usr/lib/gcc/i386-redhat-linux/3.4.6/include/varargs.h:5:2: #error "Revise
 your code to use <stdarg.h>."

   The problem occurs when trying to force a non-ANSIC build with GCC.
   Changing the source file to include <stdarg.h> instead of <varargs.h>
   doesn't help because evidently <stdarg.h> requires an ANSI C compiler.
   Nothing can be done about this. 13 Oct 2009.

   DES and 3DES encryption can be excluding removing the -DCK_DES flag. I
   removed this one and -DLIBDES (and -m32) and this makes a working
   64-bit version. Then I added code to the macosx+krb5+openssl target to
   use these flags if the Mac OS X version was 10.5 or less and leave them
   out for 10.6 or later. Tested on 10.4.11 and 10.6.1. A better way to do
   it might have been "nm -gj libssl.dylib | grep des_", but that gives
   the same results on 10.4 and 10.6. Also, 10.6 still has
   /usr/include/ssl/des.h. makefile, 13 Oct 2009.

   Tried some things to get around the problem with OpenSSL in Mac OS X
   10.6, to no avail. Asked Jeff. He said, "MacOS X no longer includes DES
   anywhere on the system. Not for SSL, not for Kerberos, not for
   anything. This will increasingly become the situation on new operating
   systems. Windows 7 and 2008 R2 will also ship with no DES." Sure
   enough, the Mac OS X Server Upgrading and Migrating document for 10.6
   says, "Mac OS X Server v10.6 does not support single DES encryption. It
   supports AES 128 and 256 encryption types. However, during a migration
   or upgrade from v10.4 to v10.6, servers that were Kerberized by the
   v10.5 Open Directory server will not use the AES 128 or 256 encryption
   types. To use the AES 128 or 256 encryption types you must re-Kerberize
   all servers." 12 Oct 2009.

   Updated C-Kermit installation for Mac OS X in ckuwr.html on the
   website. 8 Oct 2009.

   Built on Mac OS X 10.6.1. It came out automatically as a 64-bit build
   because __LP64__ is defined somewhere that I can't find. But this
   explains why the 0.9.8k on 10.6 comes up with missing symbols when the
   0.9.8k lib 10.5 (or on Solaris or on Linux) does not: it's a different
   library: "Mach-O 64-bit dynamically linked shared library x86_64",
   rather than "Mach-O dynamically linked shared library ppc". Probably
   the 64-bit version has some things #ifdef'd out. Added -m32 to the
   CFLAGS and LNKFLAGS for the macosx+krb5+openssl targets, and it built
   OK one time. But then the errors came back. makefile, 8 Oct 2009.

   Consolidated Mac OS X targets, and removed experimental 64-bit ones,
   because they never could work in 10.5 and earlier because 64-bit libs
   are missing, and 10.6 and later are 64-bit automatically. makefile, 8
   Oct 2009.

   Added SET SESSION-LOG NULL-TERMINATED-TEXT. This is for the benefit of
   a speech synthesizer that will speak a line of text only after
   receiving a NUL character. A more general solution would be to define a
   filter or whatever, but who has time. ckuus[23x].c, 7 Oct 2009.

   In Mac OS X 10.6, the following symbols are unresolved at link time:
   _des_key_sched, _des_new_random_key, _des_ecb_encrypt,
   _des_init_random_number_generator, _des_fixup_key_parity. This is with
   OpenSSL 0.9.8k. But it doesn't happen on other platforms that have
   0.9.8k.

   Built today's code on Linux RHEL4, NetBSD 5.0.1, Solaris 9, and Mac OS
   X 10.4.11, both with and without SSL. The NetBSD system has OpenSSL
   0.9.9-dev. 7 Oct 2009.

   Added patches from Seth Theriault so macosx10.5+krb5+openssl would
   build on Mac OS X 10.3.9. makefile, ckcftp.c, 7 Oct 2009.

   Tue Oct 6 17:23:27 2009 FTP address resolution is broken, but
   ftp_hookup() hasn't changed. So... (see the #ifdef HPUX6 sections of
   ckcnet.c) (I did, and I rolled back some of the changes from the other
   day, but it made no difference.) Putting back the ckcftp.c from a few
   weeks ago makes no difference. Putting back the ckcnet.c from a few
   weeks ago makes no difference.

   Later I had to back out of these, because although it made for a clean
   build, in the resulting executable SSL connections didn't work.

   Changes from Seth Theriault to suppress signed vs unsigned char
   warnings in Mac OS 10.5.8 from gcc4, and a new makefile target for Mac
   OS X (presumably 10.3.9 or later) + Kerberos 5 and OpenSSL. ckutio.c,
   ckuath.c, ckctel.c, ckcnet.c, ckcftp.c, ck_crp.c, makefile, 6 Oct 2009.

   Built on Mac OS X 10.4.11, required one minor adjustment to the
   makefile (-DNODCLINITGROUPS). This was using the macosx10.5 target,
   which is supposed to be universal like the linux and netbsd targets,
   but not yet proven. Also built a 64-bit version (-mpowerpc64 -mcpu=G5
   -mtune=G5 -arch ppc64); it compiles and links OK but won't start: "Bad
   CPU Type in executable". Fix later... makefile, 5 Oct 2009.

   For Unix, increased string buffer sizes for wildcard expansion for all
   platforms that have BIGBUFOK defined from 500000 (0.5M) to 10000000
   (10M) bytes, and for 64-bit builds to 2000000000 (2G) bytes. No point
   making it bigger than that because malloc's argument is a size_t, which
   is an int. ckufio.c, 5 Oct 2009.

   Changed the little-known and little-used RESET command (which closes
   all open files) to also put command echoing back to normal in case it
   got messed up somehow (as in HP-UX 6.5, upon returning from PUSH).
   ckuusx.c, 5 Oct 2009.

   Changed the UNIX version of SET TERMINAL TYPE to take a value and then
   do the equivalent of "export TERM=value" by calling doputenv(). This
   sets \$(TERM) correctly and passes its value along to inferior
   processes. However, to make this take effect within Kermit itself (for
   the fullscreen file transfer display and for the SCREEN command,
   Ctrl-L, etc) I also had to reinitialize the curses database, which is
   tricky because normally if you feed it an unknown terminal name, it
   just exits. ckuus7.c, 5 Oct 2009.

   I moved the PUTENV command code, which was inline, to a function,
   doputenv(). ckuus[r7].c, ckuusr.h, 5 Oct 2009.

   Changed default SET TERMINAL TYPE type for K95 from vt320 to vt220.
   This is because Unix OS's such as Solaris have dropped vt320 as a
   terminal type. settrmtyp(), ckuus7.c, 5 Oct 2009.

   HP-UX 6.5 (1989), "make hpux0650tcpc"... (8:19...) Needed to not
   include arpa/inet.h (which doesn't exist) and not use host address
   lists (add -DNOHADDRLIST), which gets us past ckcnet.c, but in ckcftp.c
   we bomb out on FD_SETSIZE undefined. Somehow we worked around this in
   ckcnet.c. Patched in a definition in ckcftp.c, and also added
   -DINTSELECT to compiler flags. Compiles ok, bombs at link time on
   bcopy, bzero, FD_ZERO, FD_SET, FD_ISSET. Now it compiles and links OK
   but dumps core when started. Added -DNOCKGETFQHOST, rebuilt from
   scratch (takes 35 minutes). It starts OK, but it dumps core when given
   a "telnet xxx" command, where xxx is a hostname. However, it works OK
   if an IP address is used: "telnet 123.45.6.78". It took all day to
   track this down, but now it's fixed (see the #ifdef HPUX6 sections of
   ckcnet.c). So now (for the first time, I think) we have both telnet and
   ftp in HP-UX 6.x, if anyone cares. ckcnet.[ch], ckcftp.c, makefile, 2
   Oct 2009.

   From Peter Eichhorn: Changes to HP-UX 7.0 target to increase the switch
   table stack size, which was overflowing. makefile, 30 Sep 2009

   From Peter Eichhorn:
     * Update to makefile to make current code build OK on HP-UX 8.00.
     * Changes to format of some hints to make them more
       copy-and-pastable.

   makefile, ckuu5.c, 18 Sep 2009.

   Built on HP-UX 11.11, 26 Sep 2009:
     * make hpux1100 (ok)
     * make hpux1100gcc (ok)
     * make hpux1100o (gets a lot of warnings about sendpath and sendfile,
       because they are also declared in <sys/socket.h>, but builds OK)
     * make hpux1000gcc+openssl \ SSLINC=-I/opt/openssl/include
       SSLLIB=-L/opt/openssl/lib

   Note: sendpath and sendfile are not Kermit symbols. The warnings are
   coming from socket.h: 'Redeclaration of "sendfile" with a different
   storage class specifier'. This is nothing new; see notes of 2-4 Jan
   2005.

   Improved the instructions for building secure versions in the makefile,
   using this example:

make solaris9+openssl "SSLINC=-I/opt/openssl-0.9.8k/include" \
   "SSLLIB=-L/opt/openssl-0.9.8k/lib"

   makefile, [81]http://kermit.columbia.edu/security.html, 25 Sep 2009.

   Added or fixed some missing prototypes in ckctel.h:
   fwdx_send_xauth_to_xserver(), fwdx_parse_displayname. 25 Sep 2009.

   Removed a bunch of old superfluous Solaris 9 and 10 targets:
   oldsolaris9, oldsolaris9lfs, solaris9g64 solaris9g_64, oldsolaris10 old
   solaris10lfs, oldsolaris10+openssl, oldsolaris10g+openssl,
   solaris10_64, oldsolaris10g, solaris10g_64, solaris10g64. There are
   still plenty more to prune but it's a start. makefile, 25 Sep 2009.

   Made consolidated Solaris 9/10/11 64-bit targets for Sun cc:
   solaris9_64, solaris10_64, solaris11_64. These simply set a couple
   flags and chain to the main solaris9 target. makefile, 25 Sep 2009.

   Made consolidated Solaris 9/10/11 64-bit targets for gcc, solaris9g64,
   solaris10g64, solaris11g64, tested on Solaris 10 Sparc. makefile, 25
   Sep 2009.

   Built the result on the same Solaris 10 system with gcc 4.2.4 using the
   new solari10g+openssl target, working out a few kinks here too.
   makefile, 25 Sep 2009.

   Squelched 20-some complaints about a character array being referred to
   directly instead of by a pointer, plus several other similar nits to
   get rid of all the compilation warnings on Solaris 10 with Sun C 5.8
   Patch 121015-06 2007/10/03. ckctel.c, ckctel.h, 25 Sep 2009.

   Fixed four typos in printfs in ck_ssl.c, \% instead of just %. 25 Sep
   2009.

   Tried building on Solaris 10 with Sun CC and OpenSSL 0.9.8k, and this
   uncovered various loose ends in the solaris9+openssl target, which I
   fixed. makefile, 25 Sep 2005.

   Built OK on Solaris 10 with Sun CC. A couple warnings about implicit
   function declarations for curses routines because apparently they
   aren't declared in curses.h. Tuff. 25 Sep 2009.

   HP-UX 9.05 on PA-RISC 9000/712 building with hpux0900o (optimizing
   compiler):
     * Warnings in ckutio.c at line 14860 about arguments to select
       (pointers are not assignment-compatible). "man select" says
       arguments are ints. Defining INTSELECT fixes these warnings but
       results in fatal errors later around line 14881 and others in the
       area involving FD_SET. This was too involved so I put it back as it
       was. 24 Sep 2009.

   HP-UX 9.05 on PA-RISC 9000/712 building with hpux0900 (bundled
   compiler):
     * ckutio.c compilation failed with PENDIN and FLUSHO not defined in
       pty_make_raw(). I dummied definitions for them to handle this
       situation on this or any other platform where it might crop up.
       ckutio.c, 24 Sep 2009.
     * Ditto for the PTY module, + IMAXBEL. ckupty.c, 24 Sep 2009.
     * References to endusershell() were fatal in the bundled compiler.
       Changed the hpux0900 target to define NODCLENDUSERSHELL, and put a
       special case in ckufio.c to not put a cast in front of the call if
       NODCLENDUSERSHELL is defined. Now it builds and links OK. makefile,
       ckufio.c, 24 Sep 2009.

   The Sony Playstation 2 and 3 are 64-bit PowerPC platforms that can run
   Linux if it is installed as an "other OS" on its hard disk; and the
   Linux kernel since 2.6.21 supports the PS3 without any patching
   required. Pawel Rogocz reported that "make linuxppc" (one of the old
   targets that has not yet been integrated into the main "linux" target)
   compiles OK on 2.6.29-ydl61.3 (Yellow Dog Linux release 6.2 'Pyxis'),
   but fails at link time because 'openpty' isn't found, because -lutil
   was not included, because that part was added only to the main linux
   target. I asked him to try "make linux" and he sent back a transcript
   in which there were thousands of errors from the curses code ckuusx.c.
   Later I tried it myself and it built without a hitch. My theory is that
   between then and now, a missing piece of the ncurses library
   (/usr/include/ncursesw) was installed. 21 Sep 2009.

   Tried building on HP-UX 10.20, bundled (non-ANSI) compiler ("make
   hpux1000"). This failed until I:

     * Moved a struct initialization out of setextern(), ckuus3.c.
     * Removed an ANSIism from the declaration of sigchld_handler() in
       ckutio.c
     * Added a cast to strcmp() in zvuser(), ckufio.c.

   Builds OK now. Built OK with "hpux1000o" (the ANSI compiler) too. And
   with "hpux1000gcc". Couldn't test "hpux1000o+openssl". 21 Sep 2009.

   Created solaris{9,10,11}+ssl target that is exactly like the
   solaris{9,10,11}g+ssl except it chains to the solaris{9,10,11} target
   instead of the solaris{9,10,11}g one. That is, it builds an SSL version
   of C-Kermit using Sun CC rather than gcc. makefile, 4 Sep 2009.

   Changed solaris{9,10,11}g+ssl target to set only the SSL-specific
   things and then chain to the main solaris{9,10,11}g target. Tested OK
   on Solaris 9 and 10. makefile, 4 Sep 2009.

   Built on Solaris 10 with gcc and Sun CC using new solaris{9,10,11}
   target that is like the new solaris{9,10,11}g one but without the
   gccisms. makefile, 4 Sep 2009.

   Fixed a complaint in ckufio.c about implicit declaration of initgroups.
   ckufio.c, 4 Sep 2009.

   Tried building on Solaris 9 with OpenSSL 0.9.8k with
   solaris9g+openssl+shadow+pam+zlib, it failed like so:

ck_ssl.c:2875: error: conflicting types for 'inet_aton'
/usr/include/arpa/inet.h:52: previous declaration of 'inet_aton' was here
make[2]: [ck_ssl.o] Error 1
make[2]: Leaving directory hmt/sirius1/prv0/kd/fdc/solaris9ssl'
make[1]: [solaris2xg+openssl+zlib+pam+shadow] Error 2
make[1]: Leaving directory hmt/sirius1/prv0/kd/fdc/solaris9ssl'
make: [solaris9g+openssl+shadow+pam+zlib] Error 2

   The problem was caused by including an inet_aton() function in ck_ssl.c
   for the benefit of platforms that don't have one in their libraries.
   This is defeated by including NO_DCL_INET_ATON in KFLAGS. I added this,
   but then I thought it would be a good idea to automatically sense the
   OpenSSL version so we can automatically set OPENSSL_097 or OPENSSL_098
   rather than bombing out, so I added code to do that too, and also to
   set the Solaris version number: 9, 10, or 11. The new entry is
   solaris9g+openssl. ckcdeb.h, makefile, 3 Sep 2009.

   Tested linux+openssl+zlib+shadow+pam, it's OK. Also linux+krb5. Also
   linux+krb5+ssl. makefile, 3 Sep 2009.

   Noticed that "make linux+openssl" fails to include -lutil a link time,
   which it needs for openpty(). That's because this target is obsolete. I
   renamed it to be oldlinux+openssl and added linux+openssl as a synonym
   for linux+ssl. makefile, 3 Sep 2009.

   Changed SSL message to mention LD_LIBRARY_PATH (Solaris), SHLIB_PATH
   (HP-UX), LIBPATH (AIX), or LD_LIBRARY_PATH (Linux). ck_ssl.c, 3 Sep
   2009

   Built on NetBSD 5.0.1/i386, regular and with OpenSSL 0.9.9-dev, 1 Sep
   2009.

   Built on RHEL 5.3 64-bit, regular and with OpenSSL 0.9.8e. 31 Aug 2009.

   Renamed aix4[23]: to oldaix4[23]: in makefile to fix the warning
   messages I didn't notice before. I didn't want to remove them because
   they have some special things that might still be needed, if anybody
   still has these AIX versions. makefile, 29 Aug 2009.

   From Kinjal Shah, a correction to the Linux makefile entry that allows
   it find the 64-bit curses or ncurses library. makefile, 29 Aug 2009.

   AIX 6.1 is out, it is really just a new name for AIX 5.4. Added
   makefile targets, plus for the first I made AIX 4.2 and later figure
   out its version number in the makefile target so we don't have to keep
   adding new -DAIXnn sections to the code, and also get its hardware name
   (e.g. "powerpc") from uname at make time, rather than hardwiring
   "rs6000" as I did before. Consolidated all AIX 4.2 and later targets so
   now just "make aix" or "make aix+ssl" can be used. Except not the gcc
   ones as they have some quirks so I'd rather not disturb them. Tested
   this on AIX 5.3. makefile, 28 Aug 2009.

   C-Kermit disables SSL with the message "?OpenSSL libraries do not match
   required version." if the version of OpenSSL that Kermit was built with
   is not exactly the same as the version that is loaded dynamically at
   runtime. This is actually the proper behavior, since APIs are not
   guaranteed not to change between OpenSSL versions prior to 1.0.0. Made
   the error message more informative. ck_ssl.c, 26 Aug 2009, and again 28
   Aug 2009.

   Updates to the new Mac OS X 10.5 target from Seth Theriault (which is
   supposed to work on all Mac OS 10-point-anything) to avoid warnings
   that came up on on Mac OS 10.4.11/Intel. Once this one is proven we
   should be able to remove/consolidate lots of other ones. makefile, 12
   Jun 2009.

   Updated the linux+openssl+zlib+shadow+pam target to chain to the new
   main Linux target. A bunch of other ones remain un-updated. makefile,
   12 Jun 2009.

   Fixed a typo in the aix51+openssl (SSLLIBS should have been SSLLIB).
   From Jason Lehr. makefile, 27 May 2009.

   There is no easy way to get the last field of string; for example, the
   extension from a filename, which might have any number of fields. In
   general we want to be able to get "word number n" counting from the
   right; \fword() lacks this ability. Now if you give it a negative word
   number, that says to count from the right; for example \fword(one two
   three four five, -2) returns "four". ckclib.c, ckuusr.c, 14 May 2009.

   zshcmd() (the function used by RUN and ! to run external commands) was
   not falling back as expected in Linux RHEL4/5 if SHELL was not defined
   in the environment. Also in all Unix versions, there was no indication
   if a RUN/! command failed (other than the return code) because the
   specified shell didn't exist or was not executable (e.g. the SHELL
   environment variable was misdefined). Now it prints the name of the
   offending shell and the reason it couldn't be executed (Not found,
   Permission denied, etc). ckufio.c, 28 April 2009.

   Patch from Seth Theriault to avoid deprecation warning for utmp
   references in ckufio.c in Mac OS X 10.5 (later, this became a
   consolidated makefile target that works automatically for at least Mac
   OS X 10.3.9 through 10.5.6). makefile, ckufio.c, 28 April 2009.

   Fixed copyright date announced in herald, ckuus5.c, 3 Mar 2009.

   Consolidated the linux targets so we no longer need three separate ones
   for curses, ncurses, and no curses. "make linux" works ok on computers
   with and without (n)curses. "make linux+ssl", ditto. "linux+krb5+ssl
   builds OK but needs -DNO_KRB5_INIT_ETS". Makefile, 3 Mar 2009.

   Tried building on Red Hat Enterprise Linux Server release 5.3 64-bit.
   There is no curses or ncurses. "make linuxnc" compiled OK but collapsed
   at link time looking for crypt(), res_search(), and dn_expand(). Turned
   out the linuxnc (and linuxc) targets needed the same treatment as the
   Linux one for 64-bit Linuxes. makefile, 3 Mar 2009.

   From Günter Knauf: 64-bit builds were failing on SuSE Linux because
   libresolv and libcrypt were in lib64 rather than lib; updated the tests
   in the linux makefile target to find them. makefile, 12 Jan 2009.

   Added SET VARIABLE-EVALUATION { RECURSIVE, SIMPLE }. This is highly
   experimental, but also highly desirable if it works out. SIMPLE
   inhibits the default recursive method of evaluating \%x and \&x[]
   variables, which is, quite frankly, nuts and makes programming in
   Kermit at best counterintuitive. I made an exception in the case of
   array subscripts, because changing how they are evaluated could break a
   lot of scripts, and anyway there should never be any harm in evaluating
   them recursively because their final value is always (or should be)
   numeric, not some string that might contain backslashes. The SET VAR
   setting is on the stack, just like SET QUIET (it follows the
   quiet/xquiet code in ckuus[356].c), so macros or command files that
   change it can't break the script that invokes them. Added \frecurse()
   to force recursive evaluation of a \%x or \&x[] variable regardless of
   the VARIABLE-EVALUATION setting. Added \v(vareval) to allow
   programmatic setting to current setting. Tested on Solaris 9 but should
   be totally portable. ckuusr.[ch], ckuus[356].c, 11 Sep 2008.

   Added invisible PUTENV command for UNIX only. Value should not be
   enclosed in doublequotes. Requires lge \v(buildid) 20080826.
   ckuusr.[ch], 26 Aug 2008.

   Made \fkeywordval() strip braces/quotes from the right-hand side so we
   can handle things like:

password="stringwithspaceatend "

   ckuus4.c, 6 Aug 2008.

   Added \v(remoteip) for the IP address of the host we're connected to,
   and \v(inmessage) for INPUT status messages corresponding to
   \v(instatus). ckuusr.h, ckcmai.c, ckuus[24].c, 26 Mar 2008.

   Changed cmifi() to not print "?No files match" (or whatever) if SET
   QUIET ON. ckucmd.c, 26 Mar 2008.

   In "set host /pty ssh ..." connections, the INPUT command suddenly
   stopped working. This is in Solaris 9. It happens with all 8.0.*
   versions of C-Kermit, so it's nothing to do with ttptycmd(). Added some
   debug() statements but they don't show anything. Turns out there wasn't
   a problem after all. Wed Mar 26 16:04:53 2008

   On Mac OS X with sz 3.73 1-30-03, however, the redirection works, so I
   assume it would also work in Linux, FreeBSD, NetBSD, etc, too. Doing
   the full test suite on Mac OS X:

gkermit   lrzsz          rzsz
 kst OK   zst FAIL (1)    OK
 ksb OK   zsb FAIL (2)    OK
 krt OK   zrt OK   (3)    OK for 100K file, fails for longer.
 krb OK   zrb FAIL (4)    OK (1MB all-bytes test pattern)

    1. 64K file OK every time; 100K file fails every time.
    2. 10K file fails every time.
    3. Succeeds with 800K file but gets a few recoverable errors.
    4. Succeeds with 48K binary file with some errors, fails with longer
       ones.

   So actually it looks pretty good, it's just that lrzsz messes up. When
   sending with lsz if I include -L 512 it sends the 100K test file with
   no errors, but still chokes on longer ones.

   Testing on Mac OS X again, but this time over a clear-text Telnet
   connection:

gkermit        lrzsz    rzsz
 kst OK   zst  FAIL(1)   OK
 ksb OK   zsb  FAIL(2)   OK
 krt OK   zrt  OK(3)     OK
 krb OK   zrb  FAIL(4)   OK

    1. Almost worked, finished 777K out of 824K without errors.
    2. Got tons of errors, failed in first 30K out of 1000K.
    3. OK for 100K file but fails for larger.
    4. OK for 48K binary fail but fails for larger.

   Maybe see if we can do without the OPENPTY part.

   TOMORROW -- just clean up the code, add some SET / SHOW / HELP
   commands, document it, and move on.

   Note: In K95, SET WINDOW sets the Zmodem packet length, 32 - 1024,
   multiple of 64.

   SEE ~/80/external.txt

   Changed ftp port from int to unsigned int. ckcftp.c, 30 Aug 2007.

   Tried again to build KRB4/KRB5/SSL/TLS version for Solaris 9. Had to
   update the build procedure again, of course, because of new file and
   directory names, but ran into problems anyway because the
   cu-solaris9g+krb5+krb4+openssl+shadow+pam+zlib target was calling
   another target that did not know about the hardwired pathnames.
   Integrated the two targets and tried building again. It actually
   compiled ok (but with lots of warnings from the security modules), but
   failed at link time with krb5_init_ets not found; fixed that with an
   #ifdef NO_KRB5_INIT_ETS, now it builds OK but without the ftp client.
   Tried building it WITH the FTP and that was OK too, no changes needed
   except to the build procedure. 12 Feb 2008, that is: C-Kermit 8.0.212 :
   20080212.

   Tried to build with -DCK_SRP and -lsrp but:

hash_supported                      ckcftp.o
hash_getdescbyname                  ckcftp.o
hash_getdescbyid                    ckcftp.o
cipher_getdescbyname                ckcftp.o
krypto_delete                       ckcftp.o
krypto_new                          ckcftp.o
cipher_supported                    ckcftp.o
krypto_msg_priv                     ckcftp.o
krypto_msg_safe                     ckcftp.o
hash_getlist                        ckcftp.o
cipher_getlist                      ckcftp.o
cipher_getdescbyid                  ckcftp.o

   Sent mail to Tom Wu and backed off for now. makefile, 14 Feb 2008. (Tom
   Wu never answered; seems like SRP is defunct.)

   The ".blah = xxx" form of variable assignment only worked for variables
   names of length 22 or less, noticed and fixed by Wolfram Sang.
   ckucmd.c, 5 Mar 2008.

   Testing remote mode:

kst OK   zst OK
ksb OK   zsb OK
krt OK   zrt OK
krb OK   zrb OK

   Functionally it all works but there are hitches with Zmodem as always.
   When sending to K95:

     * If I send with lsz, there are hundreds of "Subpacket too long"
       errors, and the transfer is very slow, but it succeeds.
     * If I send with the 1994 Omen version of sz, transmission is
       instantaneous and without errors, but then it hangs at the end.
     * If I bypass C-Kermit and send direct from lsz or sz, both work
       fine.

   So clearly the ptys are getting in the way. The hanging at the end
   would be caused by the sz process closing before its last output
   reached the master pty. It would need to do some form of flushing
   and/or pausing at the end but there's nothing I can do about that;
   these programs were not designed to be used in this way. Anyway, it
   only seems to happen with files longer than 100K.

   For local mode, testing in Solaris over our Kerberos 5 connection
   again:

 gkermit  lrzsz
kst OK   zst FAIL
ksb OK   zsb FAIL
krt OK   zrt OK but with errors
krb OK   zrb FAIL

   If I use Omen rzsz as the external protocol (e.g. with zst), it blocks
   redirection and it sends the file to my terminal, rather than over the
   connection. This would probably be because it finds out the device name
   of the job's controlling terminal and opens it, to prevent redirection.
   This is hard to prevent in Solaris because there is no TIOCSTTY
   ioctl(). Supposedly the same thing is accomplished by closing and
   reopening the slave pty after doing setsid(). I added code to do this,
   but it made no difference. (If I use lsz instead of sz, it is indeed
   redirected, but jams up after about 15K.) ckupty.c, 27 Aug 2007.

   Now back to debugging ttptycmd()... Remote-mode transfers with
   ttptycmd() were broken in two places, maybe as long as 2 weeks ago
   (this would have affected non-network transfers too, which I can't test
   any more). The logic was missing in a couple places for the non-network
   and/or non-Telnet and/or non-encrypting connections (if statements with
   no else parts). Fixed in ckutio.c, 25 Aug 2007.

   Noticed that error codes like ESRCH are not available in all modules.
   That's because of some complicated in #ifdefs in ckcdeb.h that wind up
   not always #including <errno.h>. But I notice that ckutio.c includes it
   unconditionally with no ill effects, and so does ckvfio.c. Does any
   version of Unix at all not have <errno.h>? Added a catch-all clause to
   ckcdeb.h to #include <errno.h> (in UNIX only) if, after the other
   clauses, ESRCH was still not defined. ckcdeb.h, 25 Aug 2007.

   Fixed ttptycmd() to restore console modes after a remote-mode transfer.
   ckutio.c, 25 Aug 2007.

   Added code to try to break the deadlock. If select() times out, but we
   have stuff to write either to the pty or the net, try to do it anyway,
   even though select() did not say we could. But this doesn't help
   because when select() times out we don't have anything to write. The
   problem is that after receiving that last packet from the remote rz,
   the local lsz doesn't seem to do anything, as if the lower fork wasn't
   running (and to confirm this hypothesis, sometimes I noticed that when
   I Ctrl-C'd out of this, the transfer would take off again).

   Backing up and testing with gkermit rather than zmodem:

kst ripple.txt [824K] OK
kst ascii.txt [1359K] OK
krt ripple.txt -- FAILED

   It seems that we can't handle streaming. If I set up krt to disable
   streaming on receipt, it works OK.

krt ripple.txt [824K] OK
krb all2.bin  [1000K] OK

   So here we have no trouble sending but big trouble receiving unless we
   disable streaming. Whereas with Zmodem we have trouble receiving.

   But this wasn't happening before, what changed? Using C-Kermit on the
   far end to receive the file with debug log on, I see that it is sending
   4K data packet after 4K data packet, with the local gkermit silent, as
   expected. About midway through the transfer, the local Kermit sends an
   error packet "Transmission error on reliable link". Looking at
   G-Kermit's debug log... It receives the first five 4K data packets OK,
   but gets a CRC error on the fifth one, and sends the Error packet. So
   it has received a stream of 20-some thousand bytes OK and then messes
   up. That number sounds a lot like ttptycmd()'s buffer size. I changed
   the buffer sizes to be different:

Read from pty and write to net: 4K
Read from net and write to pty: 1K

   This time it received the first 4K packet and failed on the second one.
   Then I increased the buffers to 98K each, expecting to receive lots
   more packets successfully but it bombed out on the 5th one. But that's
   good, it confirms there's no logic error in the buffer management. Just
   to make sure, though, let's set the buffer size smaller than the packet
   size and disable streaming. In this case we get 4 good data packets and
   a CRC error on the 5th one and so we request retransmission, and the
   next 8 times it arrives it gets a different CRC error, but the 9th copy
   is OK. Then the next packet comes and it gets a CRC error every time.
   And this is nothing but plain ASCII text.

   Switching to remote mode:

REMOTE=1 kk kst

   (after tricking myself because it was using ttruncmd() for this...) I
   see that nothing works at all. What did I break? 24 Aug 2007.

   ANYWAY... after fixing that, I tested zsb on Linux, and it's broken
   there too, using openpty(), so it's nothing to do with ckupty.c. After
   sending the first Zmodem data packet, it just hangs, nothing comes
   back. In text mode it gets farther, but then the same thing happens.
   Captured stderr from rz on the far end:

Bytes received:     608/1000000   BPS:21137  ETA 00:47  Retry 0: Bad CRC
Bytes received:     864/1000000   BPS:23540  ETA 00:42  Retry 0: Bad CRC
Bytes received:    1120/1000000   BPS:25003  ETA 00:39  Retry 0: Bad CRC
Bytes received:    5696/1000000   BPS:56988  ETA 00:17  Retry 0: Bad CRC
Bytes received:    9120/1000000   BPS:62227  ETA 00:15  Retry 0: Bad CRC
Bytes received:    9376/1000000   BPS:60766  ETA 00:16  Retry 0: Bad CRC
Bytes received:    9632/1000000   BPS:60361  ETA 00:16  Retry 0: Got TIMEOUT
Retry 0: Sender Canceled
Retry 0: Got ZCAN

   The local sz, however, doesn't give any error message. ZCAN means:
   "other end canceled session by sending 5 ^X's" (or user typed them).
   What actually happens is that ttptycmd()'s select() times out waiting
   for something from the Zmodem partner and ttptycmd() itself kills the
   sz fork with SIGHUP. When lsz receives SIGHUP it sends the ZCAN. So the
   real problem is that after some point we're not receiving anything.

   I changed the timeout from 4 seconds to 30 seconds and now I see it
   just stops for long periods of time and then resumes. The lrz log on
   the receiving end shows tons of timouts, CRC errors, and other errors.
   The local log shows that lsz wound up sending ZCAN (2 x (10 x ^H, 10 x
   ^X)).

   Moving on to another problem... Turns out Ctrl-C (SIGINT) is working
   right after all. Since I'm using my test scripts like kerbang scripts,
   Ctrl-C exits through trap(), as it should, closing the connection and
   cleaning up. If I start Kermit and tell it to TAKE the script, then
   Ctrl-C brings me back to the prompt with the connection still open (as
   it should). However, until now I haven't done anything about the fork
   or the ptys. Added code to trap() to kill the fork and close the master
   pty. ckuusx.c, 24 Aug 2007.

   Some tests, Solaris to NetBSD over K5. zst sends ascii.txt, a 2.36MB
   ascii text file (Kcps / Errors). zrt receives the same file:

zst 587/0 526/0 542/0 434/0 423/0
zrt 827/0 800/0 847/0 FAIL  610/0

   So text is good. Binary not so good. Here we transfer the 1MB all-bytes
   pattern file. zrb receives it successfully, but with 1248 errors, at
   only 15Kcps. Sending the same file out always fails:

Begin 20070823 16:32:07: SEND BINARY all2.bin [sz]
Sending: all2.bin
Bytes Sent:   5600/1000000   BPS:12446    ETA 01:19   FAILURE
End 20070823 16:32:13
Elapsed time: 6.617992999999842
cps = 151103.2121067556
lsz: caught signal 1; exiting

   Decided to move to Linux but found that something is screwed up in
   Linux C-Kermit with tilde expansion:

send ~/testfiles/all.bin

   doesn't expand at all (but it did yesterday!). The problem was in the
   ancient, ancient realuid/setuid handling code; real_uid() no longer
   works in Linux. I worked around this in whoami() by setting ruid to
   getuid() if real_uid() returned a negative number. Maybe dangerous,
   worry about it later. ckufio.c, 23 Aug 2007.

   Now it looks like Solaris is working but then it hangs at the end. It
   appears as if the ckupty.c module is blocking SIGCHLD. Debug log shows
   that when the transfer is complete, we received IAC DM (Telnet Data
   Mark) after sz's last gasp and before the shell prompt is printed. But
   calling tn_doop() in this case is a mistake because we are reading the
   number of bytes that we know are available in a counted loop, but
   tn_doop() would consume an unknown number of bytes and we would never
   know when to exit the loop. Anyway, C-Kermit doesn't do anything with
   DM. Skipping over tn_doop() (and not writing out the Telnet command
   bytes) fixes the hanging condition at the end, even though SIGCHLD is
   never raised. ckutio.c, 23 Aug 2007.

   Built on HP-UX 11i v3 (B.11.31 U ia64) with optimizing compiler, got
   tons of picky warnings, but it finished and linked and runs OK. Many of
   the warnings were like this:

"ckucns.c", line 1606: warning #2068-D: integer conversion resulted in a
change of sign:   tnopt[0] = (CHAR) IAC;

   IAC is defined as 255 in ckctel.h. If I define it as 0xff, I don't get
   the warnings. I changed the definitions of all the Telnet commands to
   be in hex notation rather than decimal. If cuts way down on the HP-UX
   warnings and doesn't seem to cause problems elsewhere. ckctel.h, 23 Aug
   2007.

   If sz is not given the -e flag, it sends control characters bare,
   except ^P, ^Q, ^S, and ^X. ^X is the control prefix, so ^A is sent ^X
   followed by A. With -e, all C0 control chars are prefixed, but with ^X,
   which is, of course, a control character. Interestingly, the C1 analogs
   of ^P, ^Q, ^S (but not ^X and, unfortunately, not IAC) are also
   prefixed. -e makes no difference for 8-bit characters.

   If we have a Telnet connection and the server is in ASCII (NVT) mode,
   CR is always followed by LF or NUL. Well, it seems the server is
   putting us (Kermit) in binary mode in this case, but staying in ASCII
   mode itself. Added code to handle NVT byte stuffing and unstuffing in
   each direction independently, according to the TRANSMIT_BINARY state in
   that direction. I made a file containing just the bytes 0-31 and 127
   and 128-159 and 255 (66 bytes all together) and sending it from the
   host to C-Kermit, the local log shows that every control character was
   received correctly and all TELNET conversions were done right -- NUL
   removed after CR (and only after CR); IAC removed after IAC (and only
   after an IAC meant as a quote). For the first time, I can receive the
   1MB all-values test pattern, but there are still tons of (correctable)
   CRC errors, so the transfer rate is really awful, like about 5% of what
   we get with a text file (25Kcps instead of 500).

   Further experimentation shows that the fundamental transparency problem
   is fixed; we can receive short files (say, 1K or less) containing
   absolutely any byte values in any combination with no errors at all.
   But once the file size reaches (say) 10K, we get CRC errors, like one
   every 2 or 3K of data. These are not deterministic. In successive
   transfers of the same file, they come in different spots. It's tempting
   to blame pty buffer overruns, but then text files would show the same
   behavior. When a binary file size exceeds, say, 1MB, the chances of
   successful completion go way down, independent of whether my external
   protocol is rz or lrz. I like lrz better because the error reports come
   out on the screen as the transfer is going on. Trying to download a
   real-world binary file -- a 2.2MB C-Kermit executable -- I get 4500
   error messages but the transfer eventually succeeds, with an effective
   throughput of 21Kcps.

   Actually it turns out that "sz -a somebigtextfile" (2.2MB) also gets a
   lot of CRC errors. The -e flag (escape all control characters) makes
   the same big text file transfer with few or no errors. It's not
   sure-fire. Sometimes no errors, sometimes one or two, and sometimes a
   fatal error that kills the transfer.

   With binary files... a 32K binary file seems to make it every time. 40K
   fails about 50% of the time. 48K fails 60% and every time it fails, it
   has created a partial file of exactly 32K (32768 bytes). 96K fails 9
   out of 10 times, when it fails, the partial file is always 0 bytes, or
   32768, or 65536, but that just means that rz's file output buffer is
   32K.

   Why, then, do binary files cause trouble if it is not a solid
   transparency problem? If a certain file can get through once, why can't
   it get through every time? When a character arrives at the pty, the pty
   driver probably takes a different path through its code, checking the
   terminal flags that would affect that character. I tried making
   Kermit's network read buffers very small but, surprisingly, this made
   things worse. I also tried making them very much bigger, which didn't
   help either. 24K still seems to be the right size.

   So, is it that some characters take longer to process than others? So
   long that data is lost due to lack of flow control between TCP and the
   pty? One way to test this theory is to slow Zmodem down. I tried "-l
   32" which, according to the man page, tells sz to "wait for the
   receiver to acknowledge correct data every N (32 <= N <= 1024)
   characters. This may be used to avoid network over-run when XOFF flow
   control is lacking." Makes no difference. I also tried the -w (Window)
   switch, ditto. In fact there are all sorts of options to set the
   "window size", "packet length", "block size", and "frame length", but
   with no explanation of what these mean or how they are related. If I
   crank everything down to minimum value:

lsz q -L 32 -l 32 -w 1

   I get 50% success with the 96K file instead of 10%. Adding -e, oddly
   enough, made it worse. I also tried setting the environment variable
   ZNULLS to different numbers like 512, no help there either.

   I tried making the read-from-net-write-to-pty buffer small (1K) but
   leaving the pty-to-net one big. This improves chances of success, but
   it's intolerably slow (3Kcps when the connection is capable of 500K).

   I also changed the write-to-pty operation from a single write() call of
   possibly many K characters to a byte loop, one write() per byte. Same
   result: success (but still about 300 recoverable errors), throughput
   3Kcps. 20 Aug 2007.

   With ttptycmd() configured to write to the pty in a byte loop, it is
   possible to delay each write. Adding a 10msec delay per character
   results in a transfer that runs at about 20 cps and (for the 96K test
   file) would take about 80 minutes to complete. And yet it still gets
   just as many errors. So it's not a matter of timing either. The errors
   come, on average, every file 388 bytes, but not at regular intervals.

   I tried the TIOCREMOTE ioctl on the pty master, as discussed somewhat
   obliquely in the Mac OS X "man pty" page; "This mode causes input to
   the pseudo terminal to be flow controlled and not input edited
   (regardless of the terminal mode)" -- sounds like just the ticket but
   it made no difference. Actually, looking at a man page on another OS
   (Solaris), it says this is only for lines of text, EOLs are supplied,
   so that would mess up the protocol. So remember: don't use this.

   Tried without O_NDELAY; the behavior was the same but the speed was
   much slower.

   Tried switching back to the ckupty.c routines on Mac OS X and found
   that it works now the same as with openpty(), except that I seem to get
   more getty babble at the end. But this means I can run some tests on
   Solaris. I moved the entire test environment from Mac OS X 10.4.9 to
   Solaris 9. But it doesn't work at all.

   Trying to figure out the ckupty.c modules again.
     * do_pty() calls pty_getpty() which returns in arg1 the fd of the pty
       master.
     * Then it creates a pipe as a way to tell when the child dies
     * Then it creates a fork:
          + The parent does a blocking read from the pipe
          + The child calls getptyslave() to get the pty slave and writes
            one byte to the pipe and then execs the command it's supposed
            to run

   Note that the file descriptor of the slave is known only to the lower
   fork. Therefore the lower fork is the one that has to set all the tty
   modes, etc. I took care of all that but the ckupty.c method doesn't
   work at all on Solaris. But it works "fine" on Mac OS X (the 32K
   all-bytes test file transfers instantly with no errors, but the 96K one
   errors out).

   The problem on Solaris is that pty_make_raw() fails on the masterfd
   (but not on the slavefd) with errno 25 "ioctl inappropriate for
   device". It doesn't matter whether I do it in ckupty.c or ckutio.c. I
   found a web page on kde.org that says Solaris does not allow
   tcget/setattr() on a pty master. But the Sun "knowledge base" is not
   open to the public. Well, presumably changes made to the slave are
   reflected in the master (comments in Solaris telnetd seem to confirm
   this...) Let's come back to Solaris later.

   Moving to a Linux with lrzsz installed... Built a Kerberos 5 version
   with USE_CKUPTY_C. Like on Mac OS X, it transfers short files OK and
   chokes on longer ones. Switched to openpty(), it behaves the same. So
   the problems on Mac OS X are evidently not OS-specific, which is good I
   guess, since that means finding the way around them will apply to more
   than one platform. 21 Aug 2007.

   Look into TIOCSCTTY again. On System V based OS's, opening a pty
   acquires a controlling terminal automatically. On BSD-based OS's, no;
   you have to use the TIOCSCTTY on the slave file descriptor to give it
   one. I'm not sure why a controlling terminal would be needed, except
   that without one, the virtual device "/dev/tty" does not exist for the
   process that runs on the pty, and maybe the application that runs there
   (e.g. rzsz) checks for it. On the downside, having a controlling
   terminal opens the process up to terminal interrupts like SIGINT and
   SIGQUIT. Until now I have not been using this ioctl(). Results (in
   Linux):

With TIOCSCTTY: 96K all-bytes test: 11 screens of errors, then success
Without TIOCSCTTY: exactly the same.

   Tried the same thing with TIOCNOTTY instead of TIOCSCTTY, with exactly
   the same results (no effect whatsoever).

   There has to be a way to make this work, because Zmodem works through
   telnetd, which basically the same thing as ttptycmd(): a relay between
   the network and a pty. ttptycmd() is like telnetd backwards. Modern
   telnetds are not much help; they don't access ptys or the network
   directly, they go through "mux" devices so I can't see what they're
   doing to get transparency and flow control. An old BSD telnetd uses
   packet mode but that would be a big deal...

   I tried ignoring various signals like SIGTTOU and SITSTP, since some
   Telnet clients do this. No effect, no difference. Anyway, in Linux the
   transfers almost always finish OK despite the many errors. There is
   just some trick I'm missing to make the pty accept a stream of
   arbitrary bytes without hiccuping.

   What about Solaris, which uses ckupty.c? In streams-based OS's, where
   line disciplines and whatnot are pushed on top of the pty, it looks
   like the pty module saves the file descriptor of the "bare" slave pty
   (as 'spty') before pushing things onto it, and then later uses spty
   rather than the regular slave pty file descriptor when getting/setting
   terminal modes. I'm not sure what this is all about but it's definitely
   SysVish... It happens if STREAMSPTY is defined, but I noticed that
   STREAMSPTY is never defined anywhere. I tried defining it so we take an
   entirely different path through the code. It made absolutely no
   difference.

   Then I noticed that HAVE_STREAMS is not defined for Solaris either.
   Tried defining it, but the session didn't work at all, no i/o. Removing
   the HAVE_STREAMS definition but keeping the STREAMSPTY defined, I
   rebuilt and tried "set host /connect /pty emacs". I got an EMACS screen
   but could not type anything into it, which means that STREAMSPTY should
   not be defined either. Removed the definition and "set host /pty" works
   again. So what's the problem with ttptycmd()?

   In fact, ttptycmd() works on Solaris with Kermit as the external
   protocol, but not with Zmodem, not even with text files. So again,
   there is no fundamental problem with the code or the logic, it's Just A
   Matter Of Transparency to control and/or 8-bit characters -- some trick
   I don't know about.

   Looking at the Solaris debug log... I see that ckupty.c is calling
   init_termbuf() to set the tty modes of the master, not the slave, and
   set_termbuf() to set them, but you can't do that in Solaris, error 25.
   This is in getptyslave(). Shouldn't getptyslave() be setting the tty
   modes of the slave, not the master? I changed it to do this, but like
   all other changes, it made no difference. I checked to make sure that
   after the change, "set host /pty /connect emacs" still worked and it
   did.

   And then what... I had some code to redirect stderr in ckupty.c that
   was not being executing due to a typo. When I fixed the typo, poof,
   Zmodem binary transfers started working, or working as well as they
   work in Linux and Mac OS X. It turns out that if I don't redirect
   stderr, sz and rz just don't work. But lsz and lrz do. But if I do
   redirect it, I don't see the progress messages from lsz/lrz. 22 Aug
   2007.

   Discovered that Sending binary files no longer works. Text is OK,
   binary transfers don't even start. This happens on both encrypted and
   clear-text connections. ttptycmd() is being used in both cases. But
   oddly enough, receiving binary still works as before. What did I break,
   and when? Oh, it was just the script, when I changed it from using sz
   to lsz. Putting it back to sz makes it work, even with the full 3.2MB
   binary pattern with IACs.

   I backed off the changes I made to ckctel.c to suppress some warnings,
   in view of the fact that similar changes to ckutio.c broke things so
   badly. 19 Aug 2007.

   I noticed that even Zmodem text receives can fail. They don't get any
   errors, they just get cut off shortly before the end. (But usually they
   succeed, and fast too, like 500K cps).

   What if I don't call pty_make_raw() at all on the slave pty?

   zrt: EESSSSSSSS: 80% good (E = stopped just before end but no other
   errors)

   zrb no-IAC test pattern, short blocks:
 1. S/5 (success with 5 screens of errors.
 2. S/7
 3. S/7
 4. S/6
 5. E/7 (failed just before end)
 6. S/7
 7. S/6
 8. S/6
 9. S/6

   10. S/4

   So, lots of errors, but it recovered 90% of the time. Next, same thing,
   but without requesting short blocks:

 1. E/5
 2. S/5
 3. E/4
 4. S/5
 5. S/5
 6. S/5
 7. X/0 (hard failure right away: "Got ZCAN"
 8. S/5
 9. S/5

   10. S/5

   So it doesn't look like short blocks make that much difference. Now
   what if I turn off prefixing? Bad CRC, fails immediately every time.
   Putting back pty_make_raw(slave), it still fails hard.

   Tried a new strategy with pty_make_raw(): rather than modify existing
   flags, I set all flags to 0, and then turn on only those few that we
   need like CS8. Now we get only 2.5 screens of errors instead 4-7 and
   the transfer rate is higher for binary files (all of the previous ones
   were under 100K CPS, while for text files it was 400-500K CPS):

 1. S/2 195669 CPS
 2. S/2 194720
 3. E/3
 4. S/2 192550
 5. S/3 192325
 6. S/3 145066
 7. S/2 200689
 8. S/3 188948
 9. S/2 209461

   10. S/3 181991

   I noticed that there was no TIOCSTTY ioctl in the pty/fork setup
   sequence, which is recommended somewhere, so I tried that and it was a
   disaster; the entire session hung. I took it back out. 18 Aug 2007.

   Tried some transfers over a clear-text (not encrypted) connection with
   the same results: smooth, fast transfer of a big text file (400K cps);
   rocky but successful transfer of the no-IAC binary pattern file (135K
   cps). Switching back to ttruncmd(), the same binary file is received at
   1.5M cps, and the no-IAC binary file totally fails after too many "Bad
   CRC"s; and we already know that any file that contains IACs will fail.
   One might say that ttptycmd() is better in every respect than
   ttruncmd() except in speed (when it works).

   Let's see if ttyptycmd still works in remote mode (to local K95):
     * sz / text works, but slowly.
     * lsz / text works but some weird errors are reported.
     * lsz / binary / no IAC doesn't work at all (CRC-32 mismatch for a
       header; Unexpected control character ignored: 13, etc).
     * sz / binary / no IAC works OK but slow.
     * sz / binary / full test pattern with IAC works OK but slow.
     * Sending text into rz fails completely.

   What about ttruncmd() in remote mode?
     * send /text works, fast.
     * send /binary works, fast.
     * receive /text works, not so fast but not bad.
     * receive /binary works, not so fast but not bad.

   So we use ttruncmd() for remote mode, and we use it for local mode
   serial-port and modem connections, and we use ttptycmd() on network
   connections because (a) they might be encrypted, and (b) even if they
   are not, they use some protocol that we have to handle, e.g. Telnet,
   Rlogin. 19 Aug 2007.

   Tried explicitly setting the slave pty to rawmode. Makes no difference.
   Tried using the Mac OS X (curses) raw() function, and also system("stty
   raw"); still no difference. Tried doing all of these in different
   combinations and orders. I found one combination that cuts the errors
   about in half, and the transfer of the no-IAC test pattern almost
   always succeeds (but it's slow). Anyway, it doesn't help much with the
   test pattern that contains IACs. Well, the code is more solid than it
   was before but functionally we have not advanced much if we can't
   download a binary file with Zmodem! On the other hand, we can upload
   them, and we can transfer text files in both directions, which is an
   improvement over the previous situation, in which the entire session
   would hang due to loss of synchronization of the encryption stream.

   Tried adding -funsigned-char to CFLAGS of Mac OS X target. It does not
   make the "signedness" warnings go away and it doesn't change the
   runtime symptoms.

   I tried a simpler version of pty_make_raw(), the one from Serg
   Iakovlev, but it was a total failure. That's encouraging though,
   because it indicates that pty_make_raw() is the right place to be
   working.

   Then I made pty_make_raw() set or unset every single terminal flag
   explicitly. This made no difference, but didn't hurt anything either.

   Then I made pty_make_raw() explicitly set all the c_cc[] characters to
   0 (but left c_cc[VMIN] as 1). This made no difference either.

   I checked pty_make_raw() against ttpkt() and the only difference I
   found in the terminal flags is that ttpkt() sets IGNPAR thinking it
   means "ignore parity errors" when really it means "discard any
   character that has a parity error" (at least according to Iakovlev) --
   exactly the opposite. But I tried it both ways, no difference. 17 Aug
   2007.

   Cleaned up the remaining pointer signedness warnings in ckutio.c, but
   this was a mistake, it broke Kerberos connections completely. Undid the
   changes. ckutio.c, 17 Aug 2007.

   Changed all return() in the fork()==0 section of ttptycmd() to exit().
   ckutio.c, 17 Aug 2007.

   Changed some data types and added some casts to ckctel.c to do away
   with tons of "pointer targets in passing argument 1 of 'xxx' differ in
   signedness" warnings. 15 Aug 2007.

   Set up Mac OS X as the testbed for ttptycmd(), with Panix as the remote
   partner over a Kerberos 5 connection. The first test is to send a 300K
   text file with gkermit as the external protocol. It worked fine, and
   the debug log showed all the right components were active (namely
   encryption and ttptycmd) [kermit/zmodem send/receive text/binary]:

Kermit    Zmodem
kst OK    zst OK
ksb OK    zsb OK
krt OK    zrt OK
krb OK    zrb Failed "rz: Persistent CRC or other ERROR"

   We've seen this before. The problem is 0xff, Telnet IAC, as I proved to
   myself by constructing a 3MB file that contained every byte but 0xff in
   every mixture and order and transferring it successfully over the same
   connection. Presumably the Telnet server is doubling IACs, whereas of
   course rz is not undoubling, thus the CRC error. This is progress. 15
   Aug 2007.

   Log shows that indeed every IAC in the source file arrives doubled.
   Adding code to remove the first IAC of every adjacent pair, a small
   test file with different-length runs of IACs transfers OK. The 3MB
   all.bin file does not.

   Starting over... I can receive a big text file with Zmodem OK. The
   3.2MB binary test pattern that contains no IACs failed after 1.8MB, but
   the part that it transferred was OK. A second try, almost the whole
   thing arrived, it stopped just 584 bytes short of the end. Could be
   that file size is a separate problem. Making a new copy exactly 1MB
   long... Well, that's interesting, this one too stopped just short of
   the end. And again, the same thing. When connecting back to the host,
   the last Zmodem packet can be seen on the screen; it's as if the local
   Zmodem exited before reading the last packet... But OK, if I change the
   options on the remote sz sender to use small blocks, etc, then it
   works.

   Now, changing from the 1MB no-IAC-binary test pattern, to the 1MB
   all-values test pattern, we fail after 81K. But the part that was
   transferred is correct. Second try, same thing, but 57K. Third: 40K.
   Each time, upon connecting back, the session is completely dead.

   IF I HAVE TO undouble IACs for incoming files, don't I have to double
   them going out? To send a block to net we just call ttol(), but ttol()
   doesn't do any doubling (because Kermit protocol always quotes 0xff).
   To see what happens, I changed the ttol() call to ttoc() in a loop that
   doubles IACs. I tested this by sending the full 3.2MB test pattern,
   which worked fine.

   For receiving, it's slow but it works OK with files that don't contain
   IACs (my concern was that IACs might appear in outbound files or in
   Zmodem protocol messages). It receives the 1MB no-IAC test pattern, so
   there are no problems with protocol or timing. But the full test
   pattern always gets cut off, but at different points, as before, with
   the remote session dead. Changing the Zmodem receiver from rz to lrz on
   the local end (since the sender on the remote end is lsz) does not
   change the behavior.

   Anyway, I went back and replaced the byte loop with something more
   efficient, and it goes about 20 times faster. But this doesn't help
   either, it only makes it fail faster. But aha, what if a doubled IAC is
   broken across successive pty reads -- we have to make the "previous
   character" memory persistent. Well, that was a good insight, but it
   still didn't fix it. The log shows the IAC handling code is working
   fine.

   What does sz say? Capturing its stderr to a file... "Retry 1: Got
   ZCAN". Next time: "Retry 1: Got TIMEOUT". Next time: Got ZCAN.

   Trying different Zmodem options... apparently I don't need to use short
   blocks. But I do need to use -e, probably because of Telnet NVT
   treatment of carriage return; without -e, there is a "persistent CRC
   error". -O disables timeouts, but this makes no difference.

   OK, we still have two Big Problems:

 1. When a long file has no IACs, the final < 1K of the file is not received.
 2. When a long file has IACs, the transfer generally stops very early.

   Problem 1: the transfer consistently fails less than 1K from the end of
   the file. Upon CONNECT back to the host, a big Zmodem packet is sitting
   there waiting to be read, which means ttptycmd()'s copy of rz is
   terminating early. Can we catch it in the debug log? Doing this takes
   forever and writes a GB to the disk... And then the problem doesn't
   happen. Also, I can receive a HUGE text file almost instantly with no
   errors at all.

   Switching to lrz on the receiving end, now I see the error messages,
   about 300 lines like this:

Retry 0: Garbage count exceeded
Bytes received:  872352/1000000   BPS:85464  ETA 00:01  Retry 0: Bad CRC
Bytes received:  892448/1000000   BPS:86690  ETA 00:01  Retry 0: Bad CRC
Retry 0: Garbage count exceeded
Retry 0: Garbage count exceeded
Retry 0: Garbage count exceeded
Retry 0: Garbage count exceeded
Retry 0: Garbage count exceeded
Retry 0: Garbage count exceeded
Retry 0: Got ERROR
Bytes received:  898336/1000000   BPS:84293  ETA 00:01  Retry 0: Bad CRC
Retry 0: Garbage count exceeded
Retry 0: Garbage count exceeded
Bytes received:  900384/1000000   BPS:83751  ETA 00:01  Bad escape sequence
2fRe
try 0: Bad data subpacket
Bytes received:  941472/1000000   BPS:86191  ETA 00:00  Retry 0: Bad CRC
Retry 0: Garbage count exceeded

   Even when it succeeds, it gets these. But if I receive a text file, no
   matter how big, no errors or retries or timeouts at all. So it appears
   that there is only one problem: a big-time lack of transparency
   regarding 8-bit and/or control characters. The odd thing is, it's not
   that the characters can't get through -- they all can -- but they seem
   to cause transitory blockages. 16 Aug 2007.

   [FTP SEND /RECURSIVE] Peter Crowley reported a problem with FTP
   recursive uploads getting the directory tree wrong when the previous
   pathname was a left substring of the new pathname (e.g. foo/bar/ and
   foo/bar2/). The logic did not handle this case and created the bar2
   directory as a subdirectory of bar, rather than as a parallel
   directory. Fixed in syncdir() and tested with various edge cases.
   ckcftp.c 14 Aug 2007.

notify <peter.crowley@alumni.utexas.net>

   Added CD messages to FTP BRIEF display to track the ups and downs of
   recursive uploads. ckcftp.c, 14 Aug 2007.

   The OUTPUT command gave a misleading error message ("Connection to xxx
   not open") when used on a serial port that was, indeed, open but was
   not presenting the Carrier signal, when CARRIER-WATCH was not OFF.
   Added a new message for this, and some others. ckuus5.c, 14 Aug 2007.

   Sending from the command line, e.g. kermit -s foo, did not give an
   informative error message if the file could not be found or opened.
   Fixed in ckuusy.c, 14 Aug 2007.

   OK, back to ttptycmd.... It seems that back on March 27th, I got
   everything working but I thought that there was still something wrong
   with it because an unrelated problem so I put it aside. The version of
   ttpty.c from that date worked OK, and it looks like I updated ckutio.c
   from it, but that version of ckutio.c was put aside. Since then I have
   been working on the ckutio.c version that was NOT put aside and so now
   I have to reconcile the two:

~/80/ttypty/20070327/ckutio.c
~/80/ckutio.c

   As a first cut I did this simply by replacing the contents of the
   #ifdef CK_REDIR section of the latter with that of the former. Of
   course in Solaris this comes up with openpty() implicitly declared at
   compile time and unresolved at link time. So the first task is to get
   HAVE_OPENPTY defined for platforms that have it and have the others use
   the ttruncmd(). For starters I put an #ifdef block in ckcdeb.h that
   defines HAVE_OPENPTY for Linux, FreeBSD, NetBSD, OpenBSD, and Mac OS X.
   Ones that don't have openpty() include AIX, HP-UX, and Solaris. Others
   like SCO I don't know but I doubt it. The real solution is to get the
   ckupty.c module to work but one thing at a time... This version is
   supposed work with secure builds on the openpty() platforms, and on the
   others like Solaris, if an external protocol is attempted on a secure
   (encrypted) connection, an error message is printed and the command
   fails. ckutio.c, 14 Aug 2007.

   How to test? Apparently I did all my testing on Panix before, and
   that's where all my Zmodem builds are, but now when I build a
   Kerberized version (which works if I do it on the right pool host), it
   won't make a local connection, and there is no other place I can
   connect to that has a Kerberized Telnet server. I can, however, connect
   to Panix from here, using the same code, but on Mac OS X...

   Slight detour: Got access to AIX again (5.3.0.0). Picky compiler, some
   things needed fixing.... Also it says "1506-507 (W) No licenses
   available. Contact your program supplier to add additional users.
   Compilation will proceed shortly" and of course it goes kind of slow.
   For some reason, I can't do streaming transfers into AIX over a local
   network (to its SSH server), but windowed transfers are OK. Anyway,
   noting that we've been using the same basic makefile target since AIX
   4.2, changing nothing but the version herald, I made a new target,
   simply "aix", that picks up the AIX version automatically and sets the
   herald from it. Ditto for aix+openssl, but on this host requires
   setting SSLINC and SSLLIB to /opt/ssl/include and /opt/ssl/lib. Also
   the make program here was extremely sensitive to spacing so I had to
   make some minor edits to get the link step to work for the SSL version.
   ckuusy.c, makefile, 14-15 Aug 2007.

   Got rid of the special Panix secure NetBSD target, replaced it with a
   regular one, which is invoked in the normal way by defining K5INC and
   K5LIB to point to to where the stuff is hidden. Cleaned up and
   modernized the comments in the makefile a bit. makefile 15 Aug 2007.

   Built OK on NetBSD 1.3_RC3. Tried to build secure version but the
   libraries had disappeared. 13 Aug 2007.

   Built OK on Mac OS X 10.4.9. Tried the secure version,
   macosx10.4+krb5+ssl. Here we get the usual pile of "pointer targets in
   passing argument 1 of (function name) differ in signedness", regarding
   security functions, but it built OK. 13 Aug 2007.

   Reconciling the two ttinl's... On encrypted connections myread()
   returns encrypted bytes; ttinl() has to decrypt them; it wasn't doing
   this in the lookahead section so I fixed it. The new code works on both
   encrypted and clear-text connections. I removed the chaining to
   oldttinl(), and oldttinl() itself. ckutio.c, 13 Aug 2007.

  (Wouldn't it make more sense and be more efficient and less confusing
  for myfillbuf() to do the decrypting?)

   When C-Kermit uses Zmodem as an external protocol, it doesn't seem to
   scan files before sending them to set text or binary mode
   appropriately. It's that external protocols bypass Kermit's whole "get
   next file" mechanism; the (possibly wild) filespec is simply passed to
   the external protocol program. Changing this would be a very big deal.
   But if only one file is being sent (the filespec is not wild) it's easy
   enough to check. I added this to the external protocols section of the
   protocol module. It can be overridden in any of the regular ways (/TEXT
   or /BINARY switch on SEND command, SET PATTERNS OFF, SET TRANSFER MODE
   MANUAL, etc). ckcpro.w, 13 Aug 2007.

   Revisiting the ASCII and BINARY top-level commands, which are supposed
   to be like in other FTP clients, but don't seem to have any effect. I
   added a new routine to the FTP module, doftpglobaltype(), that sets the
   global, sticky, permanent transfer mode (ASCII or BINARY) (TENEX could
   be added to if anybody asks). These commands (now that they work) are
   different from SET FTP TYPE { ASCII, BINARY }, which set the *default*
   transfer mode when automatic switching fails for a given file.
   ckuusr.c, ckcftp.c, 12 Aug 2007.
 (notify: Matt <mlist@cmcflex.com>)

   Even though the code hasn't changed, suddenly we're getting:

"ckuusx.c", line 5682: warning: implicit function declaration: tgetent
"ckuusx.c", line 6183: warning: implicit function declaration: tgetstr
"ckuusx.c", line 6262: warning: implicit function declaration: tputs
"ckuusx.c", line 6266: warning: implicit function declaration: tgoto

   in ckuusx.c on Solaris 9. <curses.h> is still in /usr/include, dated
   2002. A quick search shows the missing functions are hiding in
   <term.h>, which until now was included only in Linux. Added a
   USE_TERM_H clause. No, that doesn't help, the prototypes are not
   selected at compile time; there are #ifdefs in that file that skip over
   these prototypes. I had to put them in the code under #ifdef
   BUG999..#endif (I could have used a longer name like #ifdef
   ADD_PROTOTYPES_FOR_CURSES_FUNCTIONS, but that would not be portable).
   ckuusx.c, 12 Aug 2007.

   Also:

"ckuusx.c", line 9232: warning: implicit function declaration: creat

   This is called in the IKSD database code, used for getting a lockfile.
   creat() is a Unixism in code that is supposed to be portable. But IKSD
   only runs on Unix and Windows, so I assume the Windows C library has a
   creat() function. Anyway, suddenly the Solaris header files seem to
   have blocked whatever path previously existed to the creat() prototype
   (which is in <fcntl.h>), so I added an #include in the appropriate
   spot. ckuusx.c, 12 Aug 2007.

   Kermit functions for converting the number base -- \fradix(),
   \fhexify(), \unfhexify() -- did not work with big numbers; ckradix()
   was missed in the CK_OFF_T conversion. Fixed in ckclib.c, 12 Aug 2007.

   Updated the help text for ASCII, BINARY, and SET FTP TYPE to clarify
   the semantics. ckuus2.c, ckcftp.c, 12 Aug 2007.

   Error messages were printed upon failure to open any of the four log
   file, even with SET QUIET ON. Fixed in ckuus4.c, 12 Aug 2007.

   There was a function, islink(), used in only one place (ckuus6.c) that
   had the same name as a commonly used scalar variable, and it was
   missing a prototype. Changed its name to isalink() and added the
   prototype (Unix only), ckuus6.c, ckufio.c, ckcdeb.h. 12 Aug 2007.

   Meanwhile, using C-Kermit on Mac OS X, which makes the Kerberized
   connection just fine, but still has the problem transferring files over
   it. Packet log shows:

s-00-01-^A9 Sz/ @-#Y3~Z! z0___F"U1@A^M
r-00-01-^A9 Y~/ @-#Y3~^>J)0___J"U1@I
s-01-01-^A(!Fx.x)(V^M
r-xx-08-<timeout>
S-01-08-^A(!Fx.x)(V^M
r-xx-08-<timeout>
S-01-08-^A(!Fx.x)(V^M
r-xx-16-<timeout>

   Note that S packet is sent, received, and Ack'd OK. The F packet is
   sent but is never Ack'd. Tried this several times and noticed that it's
   just receiving that is screwed up, not sending. After ^C'ing out of the
   transfer, I can still type commands, and they are executed on the far
   end, but the results coming back are gibberish. Mon Jul 9 16:08:22 2007
   (come back to this later... substitute Dev.27 ttinl for current one and
   see if the problem goes away, and if so, conditionalize the new code
   for clear-text connections).

   Built C-Kermit with Kerberos 5 on Solaris with a version of ckutio.c
   that uses the old ttinl() and transferred a file OK over a Kerberized
   connection. So now it's just a matter of reconciling the old and new
   ttinl. The easiest way to do this is to have new ttinl() chain to old
   ttinl() if the connection is encrypted, which is what I did and it
   works fine. At some point the two versions of ttinl() should be
   reconciled. ckutio.c, 12 Aug 2007.

   It occurs to me that Kermit transfers on secure connections might have
   been broken by the changes I made back in February to ttinl() for John
   Dunlap. Here, for the first time, we invoke myunrd() to push a byte
   back into the input queue, and there is also some funny business with
   "csave", which changed, and which an old comment notes that it has to
   be treated specially when encrypting. So it could be that the broken
   Kermit transfer has nothing to do with the work on external protocols,
   and that putting back the previous ttinl() will fix it. But now I can't
   seem to make a Kerberized connection from Panix to Panix, even though I
   can make one from Columbia to Panix. This means I have to build a
   Kerberized binary from the current source code on either Solaris or Mac
   OS X. Trying Solaris first... [~/solaris9k5/mk5.sh] This didn't work
   the first time due to undefined krb5_init_ets, which is referenced if
   MIT_CURRENT is not defined (it should be for Kerberos 5 1.05 and later
   and we have 1.42 here), tried again with -DMIT_CURRENT=1... Nope, that
   one totally blew up in ck_crp.c. Later, Jeff says krb5_init_ets is a
   no-op in Kerberos 1.4.x and later, so I added an #ifdef
   (NO_KRB5_INIT_ETS) for skipping it; now it builds and runs OK.
   ckuath.c, makefile, 9 Jul 2007.

   Wed 21 Mar 2007: Back to where we left off a week ago. Trying
   C-Kermit's ttptycmd() on the Mac again, in remote mode:
     * G-Kermit send txt (kst): OK 832Kcps
     * G-Kermit recv txt (kr): OK 425Kcps
     * G-Kermit send bin (ksb): OK 1000Kcps
     * G-Kermit recv bin (kr): OK 188Kcps

   And Zmodem:

     * sz txt (zst): OK 563Kcps
     * sz bin (zsb): OK 714Kcps
     * rz txt (zr): OK 863Kcps
     * rz bin (zr): OK 198Kcps

   So in remote mode, everything works. Now let's try a clear-text Telnet
   connection...

     * G-Kermit send txt (kst): OK 841Kcps
     * G-Kermit recv txt (krt): OK 391Kcps
     * G-Kermit send bin (ksb): OK 811Kcps
     * G-Kermit recv bin (krb): OK 171Kcps

   And Zmodem over the same clear-text telnet connection:
     * sz txt (zst): OK 91Kcps (*)

   Kermit is sending sz messages like "sz 3.73 1-30-03 finished." to the
   host, which tries to execute them, after the transfer is finished. Of
   course "sz" is a command, but:

sz: cannot open 3.73: No such file or directory
sz: cannot open 1-30-03: No such file or directory
sz: cannot open finished.: No such file or directory

   Did I lose that code that dis-redirects stderr when I went back to
   using the pty code from the ckupty module? No, it's there and it's
   being executed. Apparently the copy of sz I have is writing its
   "finished" message to stdout because "sz blah 2> /dev/null" does not
   suppress it. Starting again with lsz instead of sz:

     * sz txt (lzst): OK 413Kcps
     * sz bin (lzsb): OK FAILED (*)
     * rz txt (lzrt): OK
     * rz bin (lzrb): OK

   (*) Sigh. Using lsz, we get "garbage count exceeded" errors and
   eventual failure. But using regular sz, we get the extraneous message
   that starts sz on the far tend, and the resulting getty babble.

   But even without changing the code, it will work one minute, and then
   fail consistently the next. For example, I was able to send files with
   sz successfully over and over, but with the getty babble at the end.
   Then, after trying lsz and then going back to sz, every attempt at
   sending a file quits with "Got ZCAN". The difference has to be that
   Kermit always does at least some minimal encoding of C0/C1 control
   characters such NUL and DEL and IAC, and I doubt that Zmodem does.

   [82]http://zssh.sourceforge.net/ says:

   If file transfer is initiated but never completes, e.g. a line like:
Bytes Sent:      0/    513   BPS:0        ETA 00:00  Retry 0: Got ZCAN

   can be seen, but transfer never completes), chances are the pty/tty on
   one of the systems are not 8-bit clean. (Linux is 8-bit clean, NetBSD
   is not). Using the -e (escape) option of rz should solve this problem.

   It doesn't, at least not with lrz. And yes, the receiving end happens
   to be NetBSD. But it looks like the zssh people have been down this
   road too.

   But with rz and sz, it worked. Once. Twice. Three times. But of course,
   with the getty babble at the end. This can be taken care of by doing:

rz -eq ; cat > foo

   which puts "sz 3.73 1-30-03 finished" and any other messages in foo
   (but you have to type ^D to finish the cat). Using this method I was
   also able to send an 8K binary file that contained a test pattern of
   all 256 possible byte values. Then I tried a 3MB binary executable. All
   OK. So here we go again:

     * sz txt (zst): OK
     * sz bin (zsb): OK
     * rz txt (zrt):
     * rz bin (zrb):

   Downloading fails about halfway through a fairly large file. I tried an
   even bigger file, guaranteed to be 100% ASCII; same thing -- halfway
   through: "rz: Persistent CRC or other ERROR". But it worked with a
   smaller version of the same file (82K versus 2MB). Tried again with the
   bigger version, it failed in exactly the same way at exactly the same
   spot: byte number 1048320. But this is just ASCII text so it can't be a
   transparency problem. Substituting another plain ASCII file of the same
   size but totally different contents, it doesn't fail (2.36MB). Back to
   the previous file, it fails again, but in a different spot (832960). So
   it's not totally deterministic.

   To round things out, I tried downloading the binary test-pattern file;
   it's only 8K. This failed.

-4, --try-4k                go up to 4K blocksize
-B, --bufsize N             buffer N bytes (N==auto: buffer whole file)
-e, --escape                escape all control characters (Z)
-E, --rename                force receiver to rename files it already has
-L, --packetlen N           limit subpacket length to N bytes (Z)
-l, --framelen N            limit frame length to N bytes (l>=L) (Z)

   Tried again with "sz -L 256 -B 256 -4aeq". Doesn't change anything.

   NOTE: Mac OS X rz 3.73 1-30-03 does not support -e. NetBSD rz 0.12.20
   does support -e.

   Thu 22 Mar 2007: It occurs to me that ttpkt() might still be a problem;
   maybe it's the network connection and not the pty that is not
   transparent enough. To test this theory I did "stty raw ; stty -a" and
   then copied all of the flag values into ttpkt in the BSD44ORPOSIX
   section:

     * rz txt (zrt): OK (2.36MB file, worked 2 out of 3 times)
     * rz bin (zrb): "rz: Persistent CRC or other ERROR"

   A little more fiddling with the flags and I got the 8K binary test
   pattern to SEEM to download OK (in the sense that rz gave a 0 return
   code) but the file itself was truncated, always at 224. If I changed
   the test pattern file to not include any bytes with value 224 (0xe0) or
   255 (0xff), the download worked. So we have a transparency problem
   somewhere. The debug log shows that all byte values are being received
   from the network correctly so the problem has to occur when we try to
   feed them to the pty.

   But no amount of twiddling with the termios flags seems to let these
   characters pass through. Of course, since they are not in the C0 or C1
   control range, "sz -e" doesn't quote them (which it does by prefixing
   with Ctrl-X and then adding 0x40 to the byte value so (e.g.) NUL
   becomes ^X@. Note that 255 does not cause problems because it coincides
   with the IAC character; the remote Telnet server doubles outbound IACs,
   and Kermit's ttinc() undoubles them automatically (as the log shows).

   Trying to send a different file (a C-Kermit binary) shows that 255 is
   the real killer; the file is truncated where the first one appears (at
   about 6K), even though some 224's precede it. Going back to the
   remote-mode test, I see the same thing happens with the binary
   test-pattern file, if I send it from K95 direct to
   rz-under-C-Kermit-in-remote-mode. So it has nothing to do with C-Kermit
   having a network connection. Yet if I send the same file direct from
   K95 to rz, it goes OK and the result is not truncated, so it's not
   Zmodem either. The data arrives to C-Kermit intact, so the failure is
   definitely in writing it to the rz process through the slave and master
   ptys.

   BUT if I send the same file from K95 to rz-under-ttpty, that works.
   What's the difference? Suppose I just transplant ttpty literally into
   C-Kermit... It makes no difference. When receiving the test-pattern, it
   truncates it in exactly the same place.

   Well, all this is on Mac OS X. What if I move it to a different
   platform? OK, building on Solaris and following the exact same
   procedure, ttptycmd() doesn't even use the network connection. I think
   that's because rzsz on Solaris is hardwired to use the controlling
   terminal and can't be redirected, even in a pty?

   Moved to NetBSD.

     * sz txt (zst): Failed ("Got ZCAN")
     * sz bin (zsb):
     * rz txt (zrt): OK
     * rz bin (zrb):

   Well, this is a big mess. Sending doesn't work (or sometimes it does
   but reports that it didn't). Receiving... well, actually it's the same
   thing; the file is completely transferred but then the final protocol
   handshake is lost. The local C-Kermit returns to its prompt, but rz is
   still running:

Retry 0: Got TIMEOUT
Retry 0: TIMEOUT
Retry 0: Got TIMEOUT
Retry 0: TIMEOUT
Retry 0: Got TIMEOUT
Retry 0: TIMEOUT
Retry 0: Got TIMEOUT
Retry 0: TIMEOUT
Retry 0: Got TIMEOUT
Retry 0: TIMEOUT
Retry 0: Got TIMEOUT

   I don't see how that is even possible. Even after I exit from Kermit
   the messages keep coming, even though ps doesn't show the rz process
   anywhere. Looking at the code, I see a place where end_pty() was still
   commented out from the ttpty.c episode, I uncommented it. But still:

     * sz txt (zst): Fails ("Got ZCAN")
     * sz bin (zsb): Fails instantly (but with no diagnostic)
     * rz txt (zrt): OK
     * rz bin (zrb): Fails with tons of "Bad CRC", "Garbage Count
       exceeded"

   Conclusion for the day: I think this is hopeless. Even if I can get it
   to work somewhere, the results depend on the exact Zmodem software, how
   it uses stdin/out vs stderr versus getting its own nonredirectable file
   descriptor, versus the Zmodem version on the other end and which
   options are available on each, versus the pty and select() quirks on
   each platform, and on and on. It will be so hard to explain and to set
   up that nobody would ever use it. It would be better to just implement
   Zmodem internally.

   Fri 23 Mar 2007: Went back to the small test program, ttpty.c. Tried
   setting both the master and the slave pty to rawmode, even though I
   have never seen any other software that did this. I had it receive the
   binary test pattern file; it worked. I made a bigger test-pattern file,
   3MB, containing single, double, and triple copies of each byte in byte
   order and in random order, this one was accepted too.

   So it would seem that the ckupty.c module is something to avoid after
   all. It's full of stuff I don't understand and probably should not
   undo. So changing C-Kermit's ttptycmd() to manage its own pty again,
   using openpty() (which is not portable), I got it all to work in remote
   mode: Kermit text/binary up/down and Zmodem text/binary up/down. But in
   local mode on the client side of a Telnet connection...

zst: OK, but we still get the getty babble at the end that starts sz.
zsb: OK, ditto.  This is with the 3MB test-pattern file.
zrt: Not OK -- "Persistent CRC or other ERROR"
zrb: Not OK -- got the cutoff at 224 again "Persistent CRC or other ERROR"

   It's close. But actually this was still with USE_CKUPTY_C defined. When
   I undefined it, it was back to being totally broken. Start over. (Check
   the new cfmakeraw() code.)

   Tue 27 Mar 2007: Starting over. Back to ttpty.c. Let's verify, VERY
   CAREFULLY, that it really does work, using the most stressful of the
   four tests: sending the big (3.2768MB) binary test pattern from K95
   into rz through ttpty, logging everything. ttpty definitely receives
   the big file smoothly with no errors or hiccups when I have it set to
   use the master side of the pty for i/o. The application program (Zmodem
   in this case) runs on the slave, and the network and/or control program
   communicates with the master. This implies that Zmodem controls the
   terminal modes of the slave, and ttpty should be concerned with those
   of the master. Doing it this way in ttpty confirms this.

   Fine. But if I tell ttpty to SEND a file with sz, nothing happens.
   Ditto with lsz. Select times out waiting for input from the pty. But if
   I manually tell K95 to RECEIVE /PROTOCOL:ZMODEM it works OK. Somehow
   sz's initial B000000 string is being swallowed somewhere, and it's
   waiting for a reply from the receiver. sigh... But "ttpty gkermit -s
   filename" works fine. What's the difference? It has nothing to do with
   stdout vs stderr; sz is not writing to stderr at all. Is it some timing
   thing between the forks? Aha. It's that I change the modes of the pty
   master in one fork while sz is already starting in the other fork.

   OK, good, now for the first time we have Kermit and Zmodem both able to
   upload and download a large worst-case binary test-pattern file... in
   remote mode. Now taking today's lessons and fitting them back into
   C-Kermit so I can try it local mode...

   Using G-Kermit as the external protocol, first in remote mode... All
   good: text/binary up/down. The "halting problem" is solved by SIGCHLD,
   which catches fork termination instantly and lets ttptycmd() know there
   is no more pty. Zmodem:
zst: OK
zsb: OKzrt:
 OK
zrb: OK

   That's a first. Next, repeat in local mode, in which C-Kermit is the
   client and has made a Telnet connection to another host over a secure
   (Kerberos V) connection:

kst: OK     zst: ...
ksb: OK
krt: OK
krb: OK

   It seems we can never end a day on a high note. Somehow I seem to have
   broken regular internal Kermit protocol transfers over encrypted
   connections -- the en/decryption engine loses sync. But they still work
   OK over a clear-text Telnet connection.

   Today's code in ~/80/dulce.tar (27 Mar 2007).

   Added makefile target solaris10g+openssl. Gathered all the standard
   CFLAGS for Solaris into cdcdeb.h so they don't have to be included in
   every single makefile target for Solaris. On local Solaris 10 host
   OpenSSL is in /opt/openssl-0.9.8e/. Tried the new makefile target,
   works OK. Also made solaris10+openssl for Sun CC, but couldn't test it
   because I can't find any Solaris 10 host that has Sun CC. Built with
   gcc at another site that has OpenSSL 0.9.8f-dev, all OK. ckcdeb.h,
   makefile, 24 Jun 2007.

   Fri 16 Mar 2007: ttptycmd() was for sending files with Zmodem across
   encrypted connections. But it occurred to me that it's necessary for
   clear-text connections too; e.g. Telnet, where 0xff has to be doubled.
   Of course Zmodem doesn't do that itself, so there's no way Zmodem
   external protocol could work when executed over a Telnet connection,
   and in fact it doesn't. I wonder why I ever thought it did.

   Wed 14 Mar 2007: Receiving a file thru ttpty "gkermit -e 1200 -Srd"
   produces a debug log that shows that gkermit gets a lot of EAGAIN
   errors when it tries to read from its stdin. In fact, it takes 6 tries
   (read() calls) to read the S packet (27 bytes). Then when the first
   data packet arrives (1200 bytes), read() never returns even one single
   byte. The timeout interval is 15 seconds and it times out repeatedly.
   Added a primitive hex dump to the ttpty debug log for each read/write
   (showing only the first 24 characters and the last character, so it
   fits on one line). Tried uploading a file. The S, F, and A packets
   (short) are received and Ack'd OK, but then ttpty select() times out,
   never receiving even one byte from the D packet. Clearly, when the pty
   driver receives a burst of > 1K bytes, stops working. As before, if I
   limit the packets to < 1K, it works fine.

   Can I send an 8-bit binary file? Nope. ttpty reads the binary data just
   fine from the net and writes it exactly as it was received to the pty,
   but the first time we write an 8-bit byte, we never hear back from the
   PTY again. But the log shows that when the initial 7-bit packets from
   the pty, it looks like the PTY is not in rawmode, because these packets
   end with ^J rather than ^M. Calling pty_make_raw() on the masterfd and
   slavefd explicitly, however, doesn't change anything. It doesn't matter
   if I do this in the lower fork or the upper fork. So maybe it's the
   actual semantics of pty_make_raw() that are wrong.

   Thu 15 Mar 2007: Went thru all the terminal mode flags in Mac OS X;
   didn't help. Changed hex dump to show whole packet. Put hex dump
   routine in a private copy of G-Kermit. Tried to transfer an 8-bit file,
   logging both ttpty and gkermit. Compared what ttpty received on stdin
   with what it sent to the pty (same) and what was received by G-Kermit
   (same). Then I realized that my little test program was not putting its
   controlling terminal into raw mode; when I did that, I could upload
   binary files (streaming, 2MB/sec). And with Zmodem too (with rz; lrz
   doesn't work for some reason). Looking back at the original in
   ckutio.c, I see that ttptycmd() never called ttpkt(). Maybe that was
   the trouble all along. (Yup, but maybe not the whole trouble.)

   Moving back to C-Kermit and the original ttptycmd() routine, adding the
   call to ttpkt(), and stripping out a lot of cruft, and moving the
   pty_make_raw() code to ckupty.c, Kermit uploads and downloads
   (streaming) work fine in Solaris. Zmodem sends a file, but then the
   transfer hangs at the very end, as if the signoff protocol were lost.
   This happens on Solaris. If I move back to Mac OS X, everything works
   just fine. Then, making a Kerberized connection from the Mac to NetBSD,
   I can send files from the Mac with both Zmodem and Kermit. Receiving...
   Kermit OK. Zmodem... Nope. "rz: Persistent CRC or other ERROR" (and
   created a 265MB debug.log!)

   Mon Mar 12 16:52:20 2007: Put some effort into making ttpty.c more
   useful; added a debug log. Found that for some reason, at least on Mac
   OS X, select() always timed out at the end. I added a SIGCHLD alarm and
   that seems to handle the fork exit condition very nicely. Now we can
   send (say) a 3MB file at good speed on Ethernet (1Mcps) considering the
   debugging, etc, and it terminates instantly. But when sending a file
   into ttptycmd (with "gkermit -r"), things go wrong at the end -- the Z
   packet is never acknowledged. This is reproducible. Maybe this is a
   good lead.... The log shows that select() timed out, even though the
   gkermit fork had not yet exited (or finished). It looks like gkermit
   sent the Ack, ttpty.c read it from the pty and sent it out the net:

0003: read pty=8                <-- read Ack from pty
0003: loop top have_pty=1
0003: loop top have_net=1
0003: FD_SET pty_in
0003: FD_SET ttyfd in
0003: FD_SET ttyfd out=8
0003: nfds=5
0003: select=1
0003: FD_ISSET ttyfd out
0003: write net=8               <-- send ack to net
0003: loop top have_pty=1
0003: loop top have_net=1
0003: FD_SET pty_in
0003: FD_SET ttyfd in
0003: nfds=5
0009: select=0
0009: select timeout - have_pty=1

   But Ack never arrived. This is a streaming transfer. But nope,
   streaming is not the problem. If I disable streaming ("gkermit -Sr"),
   we hang in in the middle of sending the data. If I use small packets,
   we don't hang: 1000 is OK, 2000 is not. In fact, the cutoff is 1024.
   OK, TBC...

   Wed Mar 7 16:21:13 2007 WROTE SHORT TEST PROGRAM for ttruncmd (the
   openpty version) on Mac OS X. On dulce: ~/kermit/ttpty.c / ttpty.sh. It
   starts the external protocol in the lower fork. The command to run is a
   command-line argument. Sending and receiving files with Kermit works
   OK. But again, the standalone program totally fails when I use sz or
   lsz as the external protocol. So it looks like we can rule out any
   environmental effects of running the code inside C-Kermit.

   Next problem... VMS C-Kermit ftp client sending binary files in text
   mode. Variation 1: We just send the file. zopeni() is supposed to
   detect that it's a binary file and automatically set the mode. And it
   does:

zopeni fixed file format - using blk I/O
zopeni binary flag at open=0
zopeni ifile_bmode=1
zopeni binary=0
zopeni autoswitch from TEXT to BINARY
zopeni RMS operations completed ok

   but then in gnfile():

if (!server || (server && ((whatru & WMI_FLAG) == 0)))
binary = gnf_binary;        /* Restore prevailing transfer mode */

   Well, since VMS sets text/binary mode automatically when sending files,
   this code can (and should) be skipped in VMS. gnfile(): ckcfns.c, 2 Mar
   2007.

   Variation 2: BINARY or SET FILE TYPE BINARY doesn't force binary mode.
   But SET FTP TYPE BINARY does. But BINARY does indeed call doftptyp() so
   what's the problem? We do indeed set ftp_typ to 1 but it gets reset
   somewhere before we call zopeni(). But then zopeni() puts it back to 1.
   Tracing through a transfer, it looks like all of this works right, it's
   only that the file transfer display says TEXT when the transfer is
   really in binary mode. This is because screen() is called before
   openi(). I wonder if we can call scrft() from the ftp module... No,
   that would be too easy. OK, sendrequest calls openi() and sets the file
   mode; putfile() calls screen(SCR_FN), which prints the transfer mode.
   But putfile calls sendrequest() after it puts up the screen that says
   the file type. So it looks like sendrequest() has to call
   screen(SCR_FN) again if it changes the file type. OK, that did it.
   ckuusx.c, ckcftp.c, 2 Mar 2007.

   The BINARY and TEXT (ASCII) commands do not inhibit automatic type
   switching in VMS. They don't in Unix either. They never have. Should
   they? I think so, otherwise what good are they? Plus we want the Kermit
   FTP client to behave like the others. I added code for this but it
   doesn't work, due to the layers and layers of text/binary detection and
   switching and if-this-but-then-if-that... Anyway, no harm done. The
   normal rule is: when you PUT a file, Kermit figures out on a per-file
   basis whether to use text or binary mode unless you include a /TEXT
   (/ASCII) or /BINARY switch in the PUT (or MPUT) command. ckuus[r3].c,
   ckcftp.c, 2 Mar 2007.

   2 Mar 2007: New logs from John Dunlap.

   ema-1636-log-0175.dbg: C-Kermit uploads a short file. It receives an
   Ack for the Z packet it just sent, tailgated by the beginning of a Nak
   for the next packet. When the second SOH is encountered, it is put back
   in the myread queue. Then the protocol engine, to which we return the
   Ack, says, "I have the packet I wanted so I'm clearing the buffer", and
   away go the first two bytes of the Nak from the myread buffer. Then,
   having just received the Ack of our Z packet, we send our B, and go to
   read the reply. in_chk finds 0 in the myread buffer (which we just
   cleared) and 6 waiting to be read from the comms channel, which it
   does, obtaining the remaining 6 bytes of the Nak, which it properly
   discards. (The reason this is proper is that, having already received
   the Ack for the last packet it sent, no Ack or Nak that arrives
   subsequently -- in the non-windowing case -- could possibly affect what
   it does next.) Since it hasn't yet found a good packet, it keeps
   reading, and now it finds the Ack to the B, as soon as it showed up.
   This is how it's supposed to work. No time was lost because of anything
   that C-Kermit did.

   ema-1636-log-0174.dbg: C-Kermit uploads a short file. It sends Data
   packet #3 and receives the Ack followed immediately by the first 3
   bytes of a Nak for packet 4. When it gets to the SOH of the second
   packet, it pushes it back in the queue. Again, input() flushes the
   input buffer (myread queue and device buffer). C-Kermit detects EOF on
   the file it is sending, and sends the Z packet. Then it reads the
   remaining bytes of the Nak, which it discards, and then it finds the
   Ack for Z which comes in 23 seconds later, sends the B, gets a Nak for
   the B, sends the B again, gets the Ack for the B 4 seconds later, and
   done. Again, it's working right and losing no time.

   The question remains: what would happen if the protocol engine did not
   clear the buffer? Would ttinl() retrieve all packets in sequence even
   when they come back to back? To test this, I had C-Kermit send a file
   using 30 window slots and observed the stream of Acks in the reverse
   direction:

HEXDUMP: mygetbuf read (16 bytes)
01 25 23 59 2f 52 39 0d | 01 25 24 59 2b 26 31 0d  .%#Y/R9. .%$Y+&1.
ttinl lookahead my_count=9
ttinl lookahead removed=^M
ttinl lookahead pushback SOP=^A
HEXDUMP: ttinl got (7 bytes)
01 25 23 59 2f 52 39    |                          .%#Y/R9
RECEIVE BUFFERS:
buffer inuse address length data type seq flag retries
   0     1     29212 9667     0   Y    3     0
[^A%#Y]
...
in_chk my_count=8
...
ttinl lookahead my_count=1
ttinl lookahead removed=^M
HEXDUMP: ttinl got (7 bytes)
01 25 24 59 2b 26 31    |                          .%$Y+&1
RECEIVE BUFFERS:
buffer inuse address length data type seq flag retries
   0     1     29212 9667     0   Y    4     0
[^A%$Y]

   Here we can see that the pushed-back SOH was properly retrieved next
   time around, and the tailgating Ack was not lost. This scenario repeats
   itself 212 times in the log, and there are no screwups.

   Back to VMS FTP... The problem with sending binary files is that zxin()
   uses C-Library fopen()/fread() instead of RMS, so it can't access the
   input file, which was opened by zopeni(), which is totally RMS-ified in
   VMS C-Kermit. For VMS only, I replaced the zxin() loop by a zminchar()
   loop like the one used in text mode, except without the character set
   or record-format conversion. Tested by PUT /BINARY of some binary
   files, which worked fine. ckcftp.c, 2 Mar 2007.

   Built on Solaris without and with SSL OK. Built on NetBSD with Kerberos
   5, OK. Built on Mac OS X 10.4, regular version, OK. Built on Mac OS X
   10.4 with SSL and Kerberos 5, OK.

   On VMS 7.2-1/Alpha with MultiNet 4.4A-X...


'CC' 'CCOPT' KSP:ckuus3
%DCL-W-TKNOVF, command element is too long - shorten
\CKUUS4.OBJ "'CC' 'CCOPT' KSP:ckuus4" "KSP:ckuus4.c KSP:ckcsym.h KSP:ckcdeb.h
 KSP:ckclib.h" "KSP:ckcasc.h KSP:ckcker.h KSP:ckcnet.h KSP:ckvioc.h"

"KSP:ckctel.h KSP:ckuusr.h KSP:ckucmd.h KSP:ckuver.h" "KSP:ckcxla.h
 KSP:ckuxla.h KSP:ckcuni.h KSP:ckuath.h"

   The new rule for ckuus4.c was too long. I removed one file from the
   dependency list (ckcxla.h, which will probably never change again) and
   that made it OK. Built Nonet and Net versions OK, but this is without
   the new stuff.

"make f" (large-file support) on VMS 7.2-1...
'CC' 'CCOPT' KSP:ckuus4
if (CKFSEEK(fp,(CK_OFF_T)j,SEEK_CUR) != 0) {
........................^
%CC-I-IMPLICITFUNC, In this statement, the identifier "fseeko" is implicitly
declared as a function.

   Ditto for ftello and fseeko in various other places, and then fseeko
   and ftello come up up undefined at link time.

   The rule for ckcftp in "make i" (Internal FTP support) had the same
   problem. I removed ckcxla.h from its dependency list too, but "utime"
   comes up undeclared at compile time and undefined at link time.

   Verdict: neither one of the two new features can be used in VMS 7.2 or
   earlier, but the code still builds OK if you don't ask for them.

   VMS 8.3 on IA64... Can't build anything: %MMS-F-BADTARG, Specified
   target (WERMIT) does not exist in description file

   27 Feb 2007: Changed CKVKER.COM to keep all its dependencies but use a
   shorter logical name (Steven M Schweda). The problem on VMS 8.3 is that
   MMS now supports case-sensitive file systems, and so it can't find
   anything. Workaround: bypass MMS (include "m" in P1). With this,
   "@ckvker.com ifm" builds OK on HP Testdrive, but I can't test the new
   features since outbound connections are not allowed there. As for
   fseeko(), ftello(), and utime(), they simply are not available prior to
   VMS 7.3. It would probably be a good idea to test for this in
   CKVKER.COM, but actually it is possible to install newer C's and CRTLs
   on older VMS versions, so don't stand in their way.

   28 Feb 2007: With additional changes from SMS, and then some further
   adjustments, I was able to build the FTP version on VMS 7.2-1. First I
   tested it with GET of a binary file, but it transferred it in text
   mode. After a few more attempts with PUT and GET, it crashed with
   "floating/decimal divide by zero" in ckscreen, ckuusx.c line 27859. Of
   course, that's the listing line, not the source line, and I don't have
   a listing.

   To get a listing, I deleted CKUUSX.OBJ and then did:

$ make i "" "" "/LIST"

   Surprisingly, it recompiled everything.

   Anyway, the divide by zero happened in a section of code where the
   divisor was not checked, but it was a section of code we should not
   have been executing at all, since the file-transfer display was
   fullscreen, and this was in the "brief" section. Anyway, I added the
   needed check. Again, it recompiles everything. Maybe there's no MMS on
   grumpy -- right, there isn't.

   ANYWAY... Try to GET a binary file like this:

binary
---> TYPE I
200 Type set to I.
get gkermit
---> TYPE A
200 Type set to A.
---> SIZE gkermit
550 gkermit: file too large for SIZE.
GET gkermit (text) (-1 bytes)---> TYPE A

   Anyway... "get /binary gkermit" downloads it, seemingly correctly (the
   byte count is right).

   But "put /binary gkermit.;1" results in a 0-length GKERMIT file being
   sent. Here's the debug log:

FTP PUT gnfile[DISK$MSA4:[C.FDC.NET]gkermit.;1]=1
ftp putfile flg[DISK$MSA4:[C.FDC.NET]gkermit.;1]=0
zltor fncnv[DISK$MSA4:[C.FDC.NET]gkermit.;1]=-1
FTP PUT nzltor[GKERMIT]
zfnqfp 1[DISK$MSA4:[C.FDC.NET]gkermit.;1]=675
zfnqfp 2[DISK$MSA4:[C.FDC.NET]GKERMIT.;1]=31
zfnqfp 3[DISK$MSA4:[C.FDC.NET]GKERMIT.;1]=31
zrelnam result 2[gkermit.;1]
ftp sendrequest restart[DISK$MSA4:[C.FDC.NET]gkermit.;1]=0
openi name[DISK$MSA4:[C.FDC.NET]gkermit.;1]
openi sndsrc=-1
openi file number=2
zopeni[DISK$MSA4:[C.FDC.NET]gkermit.;1]=2
zopeni fp=0
chkfn=2
chkfn return=0
zopeni fixed file format - using blk I/O
zopeni binary flag at open=1
zopeni ifile_bmode=1
zopeni binary=1
zopeni RMS operations completed ok
openi zopeni 1[DISK$MSA4:[C.FDC.NET]gkermit.;1]=1
ftpcmd cmd[PASV]
FTP SENT [PASV]
FTP RCVD [227 Entering Passive Mode (166,84,1,2,233,216)]
initconn connect ok
FTP SENT [STOR GKERMIT]
FTP RCVD [150 Opening BINARY mode data connection for 'GKERMIT'.]
doftpsend2 ftpcode[STOR]=150

Here is where the file is supposed to be read and sent but there is nothing
in the log between the "doftpsend2 ftpcode" line and the following line.

rftimer status=1
gftimer status 1=1
gftimer status 2=1409025
gftimer status 3=1409025
gftimer s[0.000000]
zclose n=2
chkfn=2
chkfn return=1
zclose ZIFILE RMS operations completed ok
ftp getreply lcs=0
ftp getreply rcs=-1
ftp getreply fc=0
FTP RCVD [226 Transfer complete.]
ftp getreply[226 Transfer complete.]=2
doftpsend2 ok=0

   Everything is OK up until we go to send the file, then it behaves as if
   we got EOF immediately and so closes the data connection, and reports
   success; an empty copy of the file is left on the far end.

   Starting over with a text file.... PUT LOGIN.COM gets another divide by
   zero. But it happened in the code I just fixed, which is impossible.
   Swell. I recompiled everything and this time the upload worked, and
   downloading it again worked too.

   But a binary file still can't be uploaded. Trying to upload a text file
   after doing this seems to succeed (reports the right number of bytes
   sent) but nothing appears on the far side.

   SUMMARY:
  To download a text file: GET /ASCII blah.txt    (/ASCII is optional)
  To download a binary file: GET /BINARY blah.bin (/BINARY is required)
  To upload a text file: PUT blah.txt             (/ASCII switch not needed)
  To upload a binary file: PUT /BINARY blah.bin   (doesn't work)

   Problems:
     * Why doesn't BINARY "stick"?
     * Why don't binary uploads work?

   The culprit seems to be the VMS version of zxin(). In the FTP module,
   zxin() is called only when sending binary files. In VMS, zxin() is just
   a front end for C-Library fread(). It probably needs to do just do
   zminchar() in a loop, like binary mode does, but calling zzout instead
   of xxout. Or something like that. FINISH THIS TOMORROW (debug on
   grumpy).

   Changed NetBSD targets to include -DHAVE_OPENPTY and -lutil, so they
   can use openpty(). makefile, 26 Feb 2007.

   From Steven M Schweda, Saint Paul, MN: adaptation of large file support
   to VMS (it was already possible to transfer large files in VMS C-Kermit
   but the file-transfer display and statistics were wrong). And a minimal
   adaptation of the FTP client to VMS -- no RMS, no special VMS file
   stuff, Stream_LF and binary files only, developed and tested only with
   UCX. SSL/TLS is supported. The source-code changes are minimal; most
   have nothing to do with VMS, but with header files, prototypes, and
   data types (e.g. ftp_port int rather than short, various
   signed/unsigned conflicts) to shut up compiler warnings. Some of these
   could be dangerous in terms of portability; I've marked them with /*
   SMS 2007/02/15 */. ckcfns.c, ckcnet.h, ck_ssl.h, ckuus3.c, ckuus4.c,
   ckvfio.c, ckcftp.c, ckvker.mms (which was rewritten to actually reflect
   the source module dependencies), ckvker.com (also heavily modified).
   ckvker.com (the "makefile" for VMS C-Kermit) now includes "F" and "I"
   option flags for the large File and Internal ftp features, plus better
   handling of Vax/Alpha/IA64 distinction. 26 Feb 2007.

   One more time with ttinl(). Got rid of the "csave" junk, which never
   could have worked (which is no doubt why it was in a debugging
   section). The problem was that saving the beginning of the next packet
   locally did not synchronize with the buffer clearing (ttflui()) done at
   a higher level, between calls to ttinl(). So now, the lookahead code,
   if it finds the beginning an as-yet unread packet, puts it back at the
   head of the input queue. This way, if the protocol engine clears the
   input buffer, it will get the whole packet, not just the part after the
   SOH. ckutio.c, 24 Feb 2007.

   If an external-protocol file transfer fails, don't print
   Kermit-specific hints. ckuus5.c, 22 Feb 2007.

   When an FTP client sends NLST to the server and no matching files are
   found, the server is supposed to respond with an error message on the
   control channel and nothing on the data channel. However it seems that
   at least one server sends the error message back on the data channel,
   as if it were a filename ("/bin/ls: blah: No such file or directory"),
   and on the control channel there is no error indication ("226 ASCII
   Transfer complete"). At this point remote_files() has a listfile and,
   if a match pattern was given, it looks through list to see if any of
   the lines match the given filename, e.g. "blah". This makes FTP CHECK
   give false positives. The problem (diagnosed by Jeff) is that the match
   pattern was not given in this case, so it takes some random default
   action, resulting in the spurious success return. Fixed by using the
   user's string as the pattern. Not tested, however, since I don't have
   access to a server that behaves this way. ckcftp.c, 22 Feb 2007.

   Added NOW keyword info to HELP DATE, plus a tip about how to convert to
   UTC; suggested by Arthur Marsh. ckuus2.c, 22 Feb 2007.

   John Dunlap noticed some strange behavior when transferring files
   between home base and the EM-APEX oceanographic floats via satellite...
   long story, but every so often the transfer would get stuck for a long
   time, and it happened only when C-Kermit was sending a file and
   received two or more packets (Ack or Nak) back to back from the float.
   Years ago I added some lookahead code to ttinl() to clear the input
   buffer of any interpacket junk so that, in the windowing case, we
   wouldn't be tricked next time around into thinking a packet was waiting
   to be read when there wasn't. The code, which has been there for a
   while, was a bit fractured; luckily, it would be executed only when the
   debug log was active so it didn't have much effect. The problem was
   that if the SOP came immediately after the EOP, it could be missed
   because the loop read the next character before checking the current
   one. Fixed by rearranging the loop. Also I changed it so it would
   execute in all cases, not only when the debug log was active. Also,
   cleaned up a bunch of confusing #ifdefs and removed some chunks that
   had been commented out for years, decades maybe. ttinl(): ckutio.c,
   21-22 Feb 2007. 15 Feb 2007... Decided to give up on this and publish
   it as is, in hopes that somebody with more experience with ptys can
   make it work, because I'm just going in circles. So today I just have
   to get the code into shape so people could choose among the three
   alternative routines. The second one, yttyptycmd(), is the one that
   uses openpty(), which is not portable, so it can be enabled only for
   Mac OS X, NetBSD, FreeBSD, and Linux, or by also defining HAVE_OPENPTY
   at compile time. Anyway, if you build Kermit in the normal way, you get
   the regular behavior -- ttruncmd() is used to execute external
   protocols. If you build it with -DXTTPTYCMD, you get the first version
   of ttptycmd(); with -DYTTPTYCMD the second, and with -DZTTPTYCMD the
   third.

   (Then some interruptions, then...)

   From Jeff, fix hostname comparison in X.509 certificate checking to
   work right in the case of names that contain no periods. dNSName_cmp():
   cl_ssl.c, 21 Feb 2007.

   27 Jan 2007: Since I have not been able to find a way to make ptys work
   for this, I made a third copy of this routine, this time using pipes
   instead of ptys. The disadvantage here is that if the external protocol
   does not use stdio, the pipes won't work, but one thing a time...

   Inferior Kermit starts in lower fork, but when it tries to send its
   first packet it gets errno=9 EBADF, Bad File Descriptor. Substituting
   G-Kermit as the external protocol, which is simpler, reveals that the
   problem is that the external protocol gets errors when it tries to
   manipulate the its stdio file descriptors with ioctls, etc; these are
   not valid for a pipe. The pipe mechanism itself works. If I take out
   the test for ttpkt() failing in gkermit, the file transfer works OK.
   Trying Zmodem... Sending works OK; receiving works a lot better than
   with ptys (it got 360K into the file before failing). Making the
   buffers smaller, doesn't help.

   I'm starting to wonder if the problem might be in my buffering code,
   rather than in the pty or pipe interface... Try making a version that
   does single-character reads and writes.

   This one reads the first packet from the lower Kermit and sends it. It
   is recognized by the other Kermit, which sends an ACK. We see the ^A of
   the ACK, but then select() times out on the next character -- OF
   COURSE: because at a lower level, it has already been read. We have to
   check the myread buffer, and then call select() only if it's empty.
   Making this change:

     * SEND with G-Kermit works (but very slowly).
     * SEND with lsz works but gets a lot of errors, eventually succeeds.

   Let's work our way back... With the same changes to the buffered pipe
   version:

     * SEND with G-Kermit/streaming works (fast).
     * SEND with lsz works too (fast), but we get gubbish at the end.
     * RECEIVE with Kermit fails because "/dev/tty is not a terminal
       device".
     * RECEIVE with rsz... lots of errors ("garbage count exceeded") but
       succeeded.

   But maybe now we're seeing pipe artifacts, so going back one more step
   to the version that gets its own pty and starts its own fork:

     * SEND with G-Kermit/Streaming works (fast) but select() times out at
       the end.

   Another breakthrough: Moved the write pieces to below the read pieces.
   This is what was preventing the buffer reset code from working -- with
   the writes done before the reads, we never catch up and can never reset
   the buffers.

     * SEND with G-Kermit/streaming works (fast) (but there's a pause at
       the end)
     * SEND with lsz works (fast) (but there's a pause at the end)
     * RECEIVE with rsz... lots of errors ("garbage count exceeded") and
       fails.
     * RECEIVE with Kermit -- nothing happens (it thinks it succeeded),
       then we reconnect, terminal sees S packet and goes into
       autodownload

   From the log it looks like ttpkt() fails in the lower Kermit. Switching
   this with the hacked G-Kermit... it gets "transmission error on
   reliable link". Tried again with real Kermit below, this time with "-l
   0" and not streaming. This was actually working, but slowly, I don't
   see any NAKs in the packet log, but then select() timed out.

   28 Jan 2007: Restored both the calls to pty_make_raw():

     * SEND with C-Kermit streaming works, but slow (54Kcps)
     * Ditto, but with debugging off -- hangs forever.
     * Ditto, but using G-Kermit instead of C-Kermit -- also hangs
       forever.

   Backed off on calling pty_make_raw(). Same thing. Reduced size of
   net-to-pty buffer. Same thing.

   26 Jan 2007: Tried changing the size of the net-to-pty buffer from 24K
   to 1K. Result: total failure. Set both buffers to 1K. Still total
   failure. Set both to 4K: now we get about 45K of data, then failure.
   Put them both back to 24K, still fails totally -- the same code that
   worked pretty well yesterday. Actually, no downloads work, not even
   Kermit, not even of text files.

   19 Jan 2007: Noticed that in snoopserver, the select() calls use
   standard input and output file descriptors, rather than the pty master.
   Made that change... In doing that I had to look at every file
   descriptor in every line of code and discovered a couple mistakes,
   fixed them, put back the original code but with the fixes, tried it,
   but no change; can upload OK but still can't download with Zmodem
   without lots of errors and ultimate failure. Going back to the
   alternative version and trying to get the file descriptors sorted out,
   now it appears that the external Kermit program never even starts in
   the lower fork. After a bit more fiddling I sort that out, but now when
   the lower Kermit program goes to open "/dev/tty" it gets errno 6
   "Device not configured". Forcing it to use stdio with "-l 0", it gets
   past this and actually sends its first packet. But the Kermit on top
   reads nothing from the pty.

   Next, I change the pty fd from STDIN_FILENO and STDOUT_FILENO to
   slavefd. No difference. Next I comment out the dup2() calls. This time
   I get some action. The transfer starts, but only one packet comes. Log
   shows that the lower Kermit sends its S packet. The upper Kermit
   receives the ACK but the lower Kermit never gets it. The write to the
   pty succeeds, no error. Different combinations give different results.
   If write to master and read from the slave, I get packets in both
   directions but tons of errors.... This happens only if I comment out
   the dup2()'s.

   25 Jan 2007: After leaving it sit for a while, and realizing that what
   I'm trying to do has to be possible because so much other software does
   the same thing (e.g. Telnet servers), I put things back to how they
   were originally -- the upper fork (Kermit) uses the master and the
   lower fork the slave. The upper fork puts the master in raw mode, the
   lower fork puts the slave in raw mode. The lower fork dup2's the slave
   fd to stdin/out. Send file in remote mode using external Kermit: works
   OK but select() times out at the end. This means that the
   self-contained pty code in ttptycmd() is sorted out -- all the file
   descriptors go to the right place, etc, and now we can use this routine
   as a testbed, rather than the original ckupty.c-based one.

   But send with lsz, csz, and regular rz: Nothing happens, times out
   after 0 bytes of i/o. Once again, Kermit works, Zmodem doesn't. The
   reason for running Zmodem in a pty is so its i/o will work as it does
   on a terminal, no matter how it may fiddle the file descriptors. So why
   don't we see a single byte come out?

   Commenting out pty_make_raw(), I get a successful Zmodem send using
   lsz. csz manages to get the filename across, but then gets stuck.
   regular sz, on the other hand, works perfectly. Testing csz by itself
   (not under Kermit), I see it fails in exactly the same way ("Got phony
   ZEOF", etc). OK, forget crzsz.

   OK, let's move to local mode over a Kerberized Telnet connection...
   Uploading (sending) with external Kermit protocol... works. Downloading
   (receiving) with external Kermit protocol... works. Uploading with
   sz... works. Downloading with lrz... Gets tons of errors and fails.

   Running pty_make_raw() on the slave but not on the master: no
   difference.
   Running pty_make_raw() on the master but not on the slave: no
   difference.

   Back where we started... Either:

     * Zmodem is overdriving the pty, no matter what modes we put it in.
     * It's a transparency problem.

   Theoretically we should be able to test these by using different sz
   switches:
-q:    quiet (should always use this)
-e:    escape all control characters
-B n:  Buffer n bytes (rather than whole file)
-L n:  Packet length
-l n:  Frame length (>= packet length)
-w n:  Window size
-4:    4K blocksize (doesn't help)

   -q by itself doesn't help. -q -e, this one worked but still got about
   100 errors and was very slow. -q -e -l 200 -L 100, failed fast and bad.
   -q -e -w 1. Failed quickly. -q -e -w 1 -B 100. Eventually failed. -q -w
   1, Eventually failed. -q -l 1024, this gets much more errors,
   definitely need -e. -q -e -l 1024, got pretty far before failing. -q -e
   -w 1 -l 1024, also got pretty far before failing. -q -e, this one got
   farthest of all, about 48K, before getting errors.

   In the latter combinations that work somewhat better, we always get up
   to 16K, or 32K, or 48K, before the errors start coming out and piling
   up. Sometimes the errors are recoverable and we receive as much as 300K
   successfully before giving up.

   Now that we have data flowing pretty well (but not well enough), tried
   reinstating pty_make_raw(), but it hurt more than helped.

   As a sanity check, I tried transferring from the same host over the
   same kind of connection (Kerberized Telnet) directly to K95's built-in
   Zmodem protocol, and that worked fine. So the problem is definitely in
   the pty. Or more precisely, where Kermit writes incoming net data to
   the pty master.

   18 Jan 2007. Tried going back to blocking rather than nonblocking reads
   to see if it would make a difference, after all the other changes.
   Nope. OK, let's look at some of these other programs...

   snoopserver.c. I don't know exactly what this is or where it's from or
   what platform it runs on and there are no comments to speak of, but it
   does approximately what ttptycmd() does. To get a pty it uses
   openpty():

  if (openpty(&pty, &tty, NULL, NULL, NULL) == -1)

   then creates a fork. In the fork, it closes the pty (master) and
   manipulates the modes of the tty (slave), dups tty to be stdio, and
   then doex execv() on the command. Meanwhile the upper fork closes the
   tty (slave), gets the attributes of stdin, using atexit() to have them
   automatically restored on exit. Then it sets stdin to raw mode and
   enters the select() loop on stdin, the pty master, and the net. It uses
   regular blocking reads. It does not use TIOCPKT or anything like it.

   openpty() is supported on: Linux, Mac OS X, NetBSD, FreeBSD, ...
   openpty() is NOT supported on: Solaris, HP-UX, ...

 1. Try copying the pty code, but keep everything else the same.

   I did this; it compiles and starts OK, upper fork (ttptycmd) debug log
   shows no errors, but nothing happens. Logs show that the Kermit program
   that is started in the subfork seems to die as soon as it reaches eof
   on its init file. The good news, at least, is that select() doesn't
   report report that the pty is ready to be read. Clearly the file
   descriptors aren't being assigned as expected, or as before.

   In ckupty.c getptyslave() dup2's the slave fd to 0 and 1. The new code
   does exactly the same thing. Debug log makes it look like the forked
   kermit is not receiving its command line. But now I'm not even sure
   that the forked kermit started at all. ps from another terminal doesn't
   show it.

   As a test I made a new routine pty_make_raw() that does cfmakeraw() (a
   nonportable "POSIX-like" function known to be used on ptys in
   applications that do approximately what we're attempting). Results:

 Solaris: errno 25 - inappropriate ioctl for device.

   This happens even when we try to get the terminal modes with
   tcgetattr(), which is completely nuts. We pass it the file descriptor
   of the pty master, which is supposed to work. But in Mac OS X, there
   are no errors. But downloads still don't work; lots of errors but the
   pattern is different. Using a very small buffer:

  Retry 0: Bad CRC
  Retry 0: Garbage count exceeded
  Retry 0: Garbage count exceeded
  Retry 0: Got TIMEOUT
  Retry 0: TIMEOUT
  Retry 0: Bad CRC
  Retry 0: Bad CRC
  Retry 0: Garbage count exceeded
  Retry 0: Garbage count exceeded
  Retry 0: TIMEOUT
  Retry 0: Got ERROR
  Retry 0: TIMEOUT
  Retry 0: Garbage count exceeded
  Retry 0: Garbage count exceeded
  Retry 0: Bad CRC

   Using a bigger buffer:

  Retry 0: Garbage count exceeded
  Retry 0: Garbage count exceeded
  Retry 0: Garbage count exceeded
  Retry 0: Garbage count exceeded
  Retry 0: Garbage count exceeded
  Retry 0: Garbage count exceeded
  (several screensful)

   Various other combinations... Nothing seems to work.

   Insight: telnetd does exactly what we want to do, sort of. But it uses
   TIOCPKT, so every time it reads from pty, it receives one control byte
   and then the data bytes, which would complicate our buffering scheme
   considerably. Anyway the TIOCPKT ioctl() fails on Mac OS X with 14 "Bad
   address".

   Also see: snoopserver.c (found in Google). It seems to do things in a
   slightly different way -- it sets stdout to raw and then dups it to the
   slave side of the pty?

   Maybe it's a mistake to use the ckupty.c routines. They are designed
   for creating and accessing an interactive session. Maybe just copy one
   of the other programs.

   Next day. This has got to be the most delicate code ever, it's like
   Whack-A-Mole, fix A and B pops up. Even without touching it, something
   that worked perfectly a 2:00 doesn't work at all at 3:00. Maybe I could
   have used pipes instead of ptys, but pipes have problems of their own.
   There has to be a way to do this. The telnet server, the SSH server,
   etc -- they all run on ptys, and we can upload files to them with
   Kermit. Why? Because Kermit puts its terminal into all the right modes
   using the time-honored methods of ttpkt() and ttvt(). Perhaps all we
   need is a copy of ttpkt() that operates on the pty.

   On that theory, let's go back to Kermit as the external protocol. It's
   important to suppress all messages and displays. With that, uploads
   work fine, no hitches.

   Downloads: We fail right away. The debug log shows the Kermit program
   that we are starting in the pty says:

  "" - Invalid command-line option, type "kermit -h" for help.

   But of course we are not giving it an invalid command-line option.
   Switching to gkermit for the external protocol, now we see that no
   matter command-line options we use, we read 0d 0d 0a from the pty and
   then the next time we go to read from the pty we get 0 bytes and
   waitpid() says the program has exited with status 1.

   Why should downloading be different from uploading? ttptycmd has no
   idea, it does everything the same. The only difference would seem to be
   which side sends first, but even that tends to get washed out by each
   program's startup messages.

   Downloading with Kermit worked 2 days ago, what's different now? The
   buffer sizes. Putting the net-to-pty back up to 24K (from 48 bytes)...
   Now it works again.

   Conclusion: Kermit conditions the pty correctly, Zmodem does not.
   Therefore ttruncmd() must duplicate what ttpkt() does.

   Or not. Because rz works fine on ssh/telnet ptys too. But not on our
   pty. lrz exits immediately with status code 2 = 01000 but there are no
   clues in the lrz.c source code, I don't even see this exit status set
   anywhere. Unredirecting stderr, I see that the error is "lrz: garbage
   on command line".

   Why do both Kermit and Zmodem sometimes think they are receiving an
   invalid command line? If I could capture the garbage...

   Side trip #1: ("pty.log",O_WRONLY) gives "no such file or directory".
   Changed this to ("pty.log",O_CREAT,0644) and now it doesn't get an
   error, and it creates the file, but not with 0644 permissions, and with
   nothing written in it. How come nothing works?

   Fine, the debug log shows that ttptycmd() receives the correct string
   (e.g. "lrz -v"). It passes it to do_pty() correctly, and do_pty()
   passes it to exec_cmd(), which runs cksplit() on it, coming up (in this
   case) with "lrz" and "-v", which is right, and then:

args = q->a_head + 1;
execvp(args[0],args);

   execvp() wants the args array to have a null element at the end.
   cksplit() does indeed do that, or at least the code is there. Added
   code to exec_cmd() to verify the argument list and that it is
   null-terminated. So far it is.

   Anyway, we have traffic between the Zmodem partners, but no joy.
   Commenting out the bit that redirects stderr, now I can see it on my
   screen in real time:

  lrz waiting to receive.Retry 0: Bad CRC
  Retry 0: Got ERROR
  Retry 0: TIMEOUT
  Retry 0: TIMEOUT
  Retry 0: TIMEOUT
  Retry 0: TIMEOUT

   etc etc, forever. Trying sz -e on the far end, I get:

  Retry 0: Bad CRC
  Retry 0: Garbage count exceeded
  Retry 0: Garbage count exceeded
  Retry 0: Garbage count exceeded
  Retry 0: Garbage count exceeded
  Retry 0: Garbage count exceeded
  Retry 0: Garbage count exceeded
  Retry 0: Garbage count exceeded
  ...
  Retry 0: Got ERROR
  Retry 0: Bad CRC
  Retry 0: Got ERROR
  Retry 0: Got ERROR
  lrz: xxufio.c removed.

   So apparently it's not a matter of escaping. Trying some other stuff, I
   caught the command-line problem in the act:

  lrz: garbage on commandline
  Try `lrz --help' for more information.

   Debug log shows:

  cksplit result[lrz]=1
  cksplit result[-v]=2
  exec_cmd arg[lrz]=0
  exec_cmd arg[-v]=1
  exec_cmd arg[]=2

   An empty string at the end instead of a null pointer. I really do not
   see any way that could happen, but rather than dig into cksplit() again
   after all these years I added a test for this in exec_cmd(), which, of
   course after adding it, never encountered this behavior again.

   Fiddled with pty buffer size again. Made it 512 bytes instead of 24K.
   Zmodem downloads are the same (Rety 0: TIMEOUT, over and over). But I
   don't see what the problem is -- every time we receive n bytes from the
   net, we write n bytes successfully to the pty and there are no errors.
   But it also looks like the remote sender is sending the file header
   over and over because it's not receiving an acknowledgment. If we're
   not losing data, then maybe it's a transparency problem.

   Tried uncommenting the TIOCblah stuff I commented out before. Now
   instead of only timeouts I get:

  lrz waiting to receive.Retry 0: Bad CRC
  Retry 0: Got ERROR
  Retry 0: Bad CRC
  Retry 0: Got ERROR
  Retry 0: Bad CRC
  Retry 0: Got ERROR
  Retry 0: TIMEOUT

   which is odd because the TIOCREMOTE ioctl failed with errno 14, EFAULT,
   bad address, which should indicate it had no effect. We're still
   receiving data from the remote in tiny chunks (from 12 to 65 bytes),
   apparently the same stuff (file header), and writing them to the pty
   successfully but nothing...

   Looked at cloning ttpkt() for the pty, but these stupid routines use
   global tty mode structs so it's not going to be easy.

   Well, we got exactly nowhere today, but I think I'll leave stderr as it
   is so users will see some feedback; no reason not to.

   WHY DO KERMIT DOWNLOADS WORK AND ZMODEM NOT?

   Is it 8-bit transparency? Up til now I've been testing with text files.
   If I try to download a binary what happens? Fails after 99 seconds.
   Packet log from the far end shows that as soon as the first packet
   containing 8-bit data is sent, everything stops. At least I got one of
   these:

  17:23:56.475 exec_cmd arg[gkermit]=0
  17:23:56.475 exec_cmd arg[-qr]=1
  17:23:56.475 exec_cmd arg[]=2
  17:23:56.475 exec_cmd SUBSTITUTING NULL=2  <-- the code I just added

   Doing this again shows the same thing on the near end. All the
   7-bit-only packets are sent and acknowledged OK. Three 8-bit data
   packets arrive and nothing else happens after that. This is with
   G-Kermit.

   The same thing happens with C-Kermit receiving. But if I change
   C-Kermit's .kermrc to turn off streaming and use a short packet length:

   The transfer works, even though it's sending 8-bit bytes. So the
   problem is not 8-bit data after all, per se. Facts:

     * Kermit can receive streaming transfers of 7-bit files.
     * Kermit can not receive streaming transfers of 8-bit files.
     * Kermit can receive nonstreaming transfers of 8-bit files with short
       packets.
     * Kermit can receive nonstreaming transfers of 8-bit files with 1K
       packets.
     * Kermit can receive nonstreaming transfers of 8-bit files with 4K
       packets.

   So it's the combination of streaming and 8-bit data? 12 Jan 2007.

   Without any way to make the pty transparent and flow controlled, it
   would seem to make sense to write to the pty in smaller chunks than we
   do to the net. I left the read-from-pty-write-to-net buffer at 24K and
   changed the read-from-net-write-to-pty buffer to 48 bytes.

   Upload using lsz worked but took about 3 minutes. Actually it didn't
   work. On the local end it seemed to work, but the file did not appear
   on the remote end. Tried this several times, each time with different
   results, adding more debugging each time. The problem this time was
   that the pty read could get EWOULDBLOCK. Changed the code to not treat
   this as an error, now Zmodem uploads are solid again except I never got
   EWOULDBLOCK again either, even though I repeated the same upload about
   1000 times (with throughput of over 2MBps even with debugging on), so
   the test for it has not been exercised.

   OK, uploads still work. Back to downloading... The very first pty read
   gets 0 bytes, followed by the fork test that shows that it exited with
   exit status 2.

   Next we try starting sz with some different options on the far end:

 -q: quiet (no messages):
     for some reason this gets totally stuck.
     it looks as if this option is misdocumented;
     sz seems to be sending the letter C (as in Xmodem 1K or whatever)

 -e: escape (all control chars):
     first attempt to read pty finds the process gone with exit status 2.

 -k: send 1k blocks:
     this one didn't stop immediately.  It reads 48 bytes from net, writes
     48 to the pty with no error.  Then reads 21 bytes from the pty, writes
     them to the net OK.  Then reads 48 bytes from net, writes them to pty OK,
     reads 21 from pty, writes to net OK, etc etc...  It appears to have
     worked but (final read from pty returned 0, fork test showed lrz exited
     with status 0), but only 754 bytes were received from the net when the
     file is 420K...

   Well this only goes to show that the faster we shove stuff into the
   pty, the worse it gets. Zmodem downloads won't work unless we can make
   the pty transparent and flow-controlled. So to summarize today's
   developments:

     * separated in/out buffer sizes
     * handled EWOULDBLOCK
     * found out that sz options don't help much

   11 Jan 2007.

   Not so great in Zmodem land, however. If I start the external-protocol
   receiver on the far end, escape back and start a Zmodem send...
   nothing. If I leave the remote C-Kermit at its prompt (where it
   supposed to recognize the Zmodem start string), still nothing. On the
   other hand, if I do it with a script instead of by hand:

def xx output take blah\13, send /proto:zmodem \%1
do xx

   it works, at least intermittently. But that's in remote mode. We won't
   be using this in remote mode. In local mode, where we have a secure
   connection to another computer, it seems we can read from the pty and
   write to the net, but we time out waiting to read from the net; nothing
   arrives. Well, we know that i/o works both ways, so there is some kind
   of screwup with the Zmodem protocol start itself. Increasing the (still
   hardwired timeout) from 5 to 22sec and driving the whole process with a
   script so as to avoid autodownload as well as manual dexterity
   effects... It just sits there forever, way longer than 22 sec. ^C'ing
   out, I see that sz was indeed started on the far end and the protocol
   was executing. But it looks like the receiver (the one running under
   ttptycmd()) is getting trashed packets, because (a) it seems to be
   sending the same thing over and over again, and (b) sometimes it waits
   as long as 10 seconds before anything arrives from the remote. Maybe I
   was too impatient; I interrupted it after 4 minutes but it seems to
   have been making some progress. Whenever there was data available to
   read from the net, it was always 65 bytes, and it was not actually the
   same data over and over. This is using lrz as the external protocol.
   crz gets a bit farther. In this case we read up to 24K at a gulp, but
   the amount varies a lot. It looks like we took in about 1.2MB of Zmodem
   protocol data, but were only able to output the first 20K of the file.
   Clearly there were lots of errors. In the end, the crz exits with
   status 1 (failure).

   Anyway it looks like we're back at needing to find a way to accomplish
   something like TIOCREMOTE on the pty, which is where we came in. 10 Jan
   2007.

   Now we're back where we were yesterday morning, but with better
   throughput. The big issue then was receiving files. But yikes, now it
   works! Not only that, I got a transfer rate of 2.1M cps. That's using
   Kermit protocol, streaming, and big (4K) packets. Which didn't work
   before. Not a fluke either, I uploaded bigger and bigger files up to
   6MB, they all went smoothly, at rates between 1 and 2 MBps. 10 Jan
   2007.

   Moving to Mac OS X, everything works the same as on Solaris, except I
   don't get the Zmodem getty babble there, not even with Omen rzsz.
   Tested sends in both remote and local mode, the latter over a secure
   Kerberos 5 Telnet connection, using C-Kermit, rzsz, lrzsz, and crzsz,
   all good. 10 Jan 2007.

   Found in HP-UX "man 7 pty" a description of ioctl(fd,TIOCTTY,fc) which
   is exactly what we want: fc 0 turns off all termio processing and
   guarantees an uninterrupted, unmolested, flow-controlled stream of
   bytes in both directions. This function also exists in Linux, but not
   in Solaris, NetBSD, or Mac OS X (TIOCNOTTY is not what we want, it does
   something else entirely).

   Another possibility is TIOCREMOTE, which "causes input to the
   pseudoterminal to be flow controlled and not input edited, regardless
   of the terminal mode". This one exists in at least HPUX, NetBSD,
   Solaris, and Mac OS X.

   Solaris: builds OK, but at runtime we get ENOTTY ("Inappropriate ioctl
   for device"). By the time this happens, it's hard to tell from the code
   whether the fd we're using is for the master or the slave; TIOCREMOTE
   can be used only on the master. Close inspection shows that I am indeed
   doing that; ptyfd as seen by ttptycmd() is truly the master, i.e. the
   /dev/ptyXX device, not the /dev/ttyXX device (the slave fd can't be
   seen at all, as it exists only in a separate fork). OK, so now we know
   that TIOCREMOTE can't be used on Solaris.

   NetBSD: Somehow, whether as a result of today's fiddling or the phase
   of the moon, the code in pty_open_slave() that tries to open /dev/tty
   started failing on NetBSD ("Device not configured"). Changing it to be
   run only if fc == 0 (which doesn't seem to hurt anything), once again I
   get ENOTTY on the TIOCREMOTE ioctl. Zmodem works but Kermit totally
   fails (the fork exits immediately with an exit code of 0, even though
   it didn't do anything).

   Mac OS X: Exactly the same sequence and results as NetBSD.

   Linux: It did not execute the new ioctl at all; apparently the TIOC
   symbols are hidden or not exported or something.

   Where we stand:
     * Downloads don't work
     * Uploads got slow again
     * Kermit doesn't work at all as an external protocol

   Actually if I take the debugging out it goes fast, but it doesn't
   finish.

   All today's work on ttptycmd() looks like a dead end. To roll back to
   yesterday:

  cp ckutio.c-20070108 ckutio.c
  cp ckupty.c-20070108 ckupty.c
  cp ckupty.h-20070108 ckupty.h

   or to continue with today's:

  cp ckutio.c-20070109 ckutio.c
  cp ckupty.c-20070109 ckupty.c
  cp ckupty.h-20070109 ckupty.h

   Comparing Monday's and Tuesday's pty-related code, the differences are:
 1. Passing of function code to and among pty modules.
 2. Skipping the TIOCSCTTY ioctl and the open("/dev/tty") test.
 3. Attempting to put pty in TIOCTTY or TIOCREMOTE mode.

   Commenting out 2 and 3 should put us back where we were on Monday if
   the parameterization was done right. And with this, on Solaris,
   downloading with Kermit external protocol works but slowly, 8K cps,
   with or without debugging. Debug log does not show any obvious
   bottlenecks; select() takes anywhere between no time at all and 0.1
   seconds to return. If I increase the pty-net buffer size from 1K to 4K,
   the rate goes up to 55K cps. If I make it 8K I get 136K cps. With 16K I
   get 346K cps. 32K: 395K cps -- this last one isn't worth the doubling.
   But at 24K I get 490K cps, sometimes twice that. Let's stick with 24K
   for now. Downloading with Zmodem (rzsz) works at the same rate, but now
   we're back to seeing the getty babble (Several "**B0800000000022d") at
   the end. 10 Jan 2007.

   Back to ttptycmd()... When we left off, we could send but not receive.
   Set up a test case using Kermit as the external protocol for receiving
   a short file. If I SET STREAMING OFF and use short packets, it actually
   does work, so it's not a complete failure to function, but apparently a
   lack of flow control for the pty. Began by completing the
   parameterization of the pty module, so it can be called for interactive
   use (fc 0) or for running protocols (1). Confirmed that everything
   works at least as well as before (e.g. "set host /pty emacs" vs
   external protocols). ckcdeb.h, ckutio.c, ckupty.c, 9 Jan 2007.

   After noticing a few problems running the pop.ksc script in production
   over the past year, rewrote \femailaddress() to be more reliable and a
   lot simpler. ckuus4.c, 9 Jan 2007.

   Let's move this from Mac OS to NetBSD and see how it works. Well, the
   file transfer was just fine, but then I used some sexps to calculate
   the elapsed time and transfer rate, and Kermit hung in dosexp(). Fine,
   ignoring that... The debug log shows that ttptycmd() gets the pty OK,
   master and slave, the i/o goes smoothly, and waitpid() does its job
   perfectly. Solaris, same deal; ttruncmd() goes smoothly, but then the
   sexps afterward get "Arithmetic exception". Turns out there was a BAD
   bug in dosexp() that allowed an integer division by 0 to occur under
   certain circumstances; it's always been there. Fixed in dosexp():
   ckuus3.c, 8 Jan 2007.

   The problem is that in this case, reads from the pty never get anything
   (no data, no error), write always gets an error. It's as if the pty was
   not being set up right, or we're using the wrong file descriptor. And
   if we skip the autodownload? Same thing.

   OK, putting downloads aside for a moment, let's get uploads working as
   well as possible. At this point we have the odd situation (at least in
   this configuration) that the upload succeeds, but now for some reason
   we are unable to read the exit status from the process, even though
   this was working before, so ttptycmd() returns 0 (failure), yet Kermit
   reports success.

   Well, it turns out that kill(pty_fork_pid,0) was gumming up the works.
   If we use only waitpid() all is well, I think. waitpid() with WNOHANG
   returns -1 with status -1 errno 0 if the pid has not exited, and it
   returns the pid and status > -1 if the process has exited. Fixed
   pty_get_status() to do it this way. ckutio.c, 7 Jan 2007.

   (days later...)

   ckucns.c seems to do the right thing; it recognize the ZSTART string,
   activates the Zmodem-Receive APC, and returns. doconect() sees the APC
   and begins to execute it. The RECEIVE command results in a call to the
   GET command parser, doxget() (IS THAT RIGHT?), then comes a ttflui(),
   which throws away a bunch of stuff. Finally we get to ttptycmd(), we
   get a pty and run lrz in it, select() says stuff is waiting from the
   pty, but read returns 0, errno 0. Skipping the ttflui() in doxget() if
   the protocol was not Kermit didn't seem to make difference. ckuus6.c, 8
   Jan 2007.

   Tried an upload over a secure connection using lsz. Unexpectedly, this
   time it worked; not only was the file (about 0.5MB) transferred
   correctly, but Kermit detected the fork's termination and got the pid's
   exit status, and, for the first time, correctly reported a successful
   transfer. I have no idea why this works today and not yesterday. More
   tests; it works most of the time. It works with csz and with regular sz
   too.

   Spent a couple hours trying to rearrange the code in the pty module to
   skip past inaccessible slaves but it was a rabbit hole, not worth it,
   backed off. 8 Jan 2008.

   Changing the subject... On my test system, every time I execute
   ttptycmd(), I get "permission denied" on /dev/ttyp3. Then I run it
   again and get to ttyp4 which is OK. I wanted to skip past any pty for
   which I lack permission and try the next without raising an error.
   Added debugging code:

16:25:23.524 pty_getpty() pty master open error[/dev/ptyp0]=5
16:25:23.524 pty_getpty() pty master open error[/dev/ptyp1]=5
16:25:23.524 pty_getpty() pty master open error[/dev/ptyp2]=5
16:25:23.524 pty_getpty() found pty master[/dev/ptyp3]
16:25:23.524 pty_getpty() slavebuf [2][/dev/ttyp3]

   So it already was skipping past open errors; ttyp3 was opened
   successfully. The problem is that ptyp3 is rw-rw-rw-, but the
   corresponding master, ttyp3, is rw--r----. It seems the code assumes
   that if the master can be opened, then so can the corresponding slave.
   Unfortunately, the code is not structured to allow us to skip ahead to
   the next master if the slave can't be opened. 7 Jan 2007.

   Added calls to pty_get_status() to every place where we suspect a pty
   error, tried again with lrzsz, crzsz, and regular rzsz. All three work,
   but in each case waitpid() indicates that the sz program gave exit code
   1 (failure). ckutio.c, 7 Jan 2007.

   Moved pty fork testing to a separate routine, pty_get_status(), and
   added a call to it from the place where we time out, in case the fork
   terminated; then we can get and return its status. 6 Jan 2007.

   Tried again, saw that the file is actually transferred instantly but
   then we're not picking up the protocol at the end. Theory: after the
   transfer finishes, we come back to the prompt on the remote host, which
   means we have something to read from the net and write to the pty, but
   the pty has already exited. AFTER THE PTY IS GONE, WE DO NOT WANT TO
   READ FROM THE NET ANY MORE. Adding this test makes Kermit succeed right
   away when sending the same largish file, with a transfer rate of 4M
   cps, that's better. But the rz program on the far end is evidently not
   receiving the goodbye handshake from the receiver, because it sits
   there foreever in its *B09002402009418 mode until I ^X^X^X^X^X out of
   it, at which point it deletes the file it already received, not very
   helpful. In the code, I read from the pty if the pty is open and there
   is room in the buffer. This means that when we get to the end, either
   there is no room in the buffer (unlikely) or the last bit sent by sz
   before exiting was cut off when the fork closed. Why do we get in this
   fix only with Zmodem and not with Kermit?

   In Mac OS X, after sz exits, we get ERRNO=5 if we try to write to the
   pty, but we still get no errors after that if we try to read from it.
   Still, prior to this we did more than 20 unproductive nonblocking reads
   from the pty (no error, no bytes) without incident; there did not seem
   to be anything waiting. In fact, the last thing we read from the pty
   were the text messages that are issued at the end of the transfer: "rz
   3.73 1-30-03 finished." After which it pauses a second and spits out a
   message about UNREGISTERED COPY.

   Figured out how to build lrzsz, in hopes that the previous problems
   were with rzsz and crzsz's fiddling with file descriptors, but I get
   the same behavior. Which is good, I guess, because if I can fix one, I
   fix them all. Or not... Testing lrz by itself (not under C-Kermit), I
   see that it doesn't work at all with Kermit's own Zmodem
   implementation.

   OK, here's one problem: at the end of the transfer, the Omen Zmodems
   print stuff like "Please read the license agreement", Kermit dutifully
   reads this from the pty and sends it to the host, the host shell says
   "Please: command not found", issues its prompt again, which Kermit
   reads, feeds to the pty, and apparently the pty echoes it, so we send
   it back to the host, and there ensues an infinite loop of getty babble
   until the pty closes. Now, there ought to be a way to make the external
   protocol shut up, like Kermit's -q(uiet) flag, but these are
   unregistered versions so you can't shut up the messages. In fact, the
   transfer works, but the getty babble at the end ruins the experience.
   Now I'm beginning to wonder how any of these programs ever worked as
   external protocols. Hmmm, now that I try it, I see the same thing
   happens the old way, when using ttruncmd() rather than ttptycmd().

   Reading the crzsz documentation I see it says that messages come out on
   stderr. OK, that's progress. In ckupty.c I try redirecting 2 to
   /dev/null. Well good, this filters out the messages from csz, but we
   still get getty babble on the prompt. In the debug log, we read the
   last bunch of stuff from net, 618 bytes of Zmodem stuff... Now what
   happens?

   Zmodem on the remote exits, the host prints its prompt. Kermit, of
   course, reads the prompt from the net, now come to the bottom of the
   loop and we have 7 bytes to write to the pty, and no error condition,
   so we continue the loop. select() says that the pty is ready for
   writing. We write the 7 bytes and and get no error. Loop again, this
   time select() says the pty has data waiting. Sure enough we get the
   prompt back, and send it to the net, and thus begins the getty babble.
   There are two causes for this:

    1. crzsz does not exit immediately; it sleeps for 10 seconds after
       printing its nag message.
    2. During this interval the pty seems to be echoing what is sent to
       it. csz is not echoing; I checked. Anyway, removing the pause
       doesn't seem to make a difference.

   ttptycmd() needs to:

     * TELL the pty module to redirect stderr to /dev/null
     * SET PTY TO NOECHO (master or slave?)

   Tried setting the pty to noecho:

termbuf.c_lflag &= ~(ECHO|ECHOE|ECHOK);

   and this seemed to stop the getty babble. After the file transfer, I
   read back the prompt from the host shell, I write the prompt bytes to
   the pty; there is no error. And now select() simply hangs forever (or
   times out if a timeout is set). The question here is: why didn't
   writing to the pty produce an error? And, because we never detect the
   pty has exited, we can't set a good return code. 5 Jan 2007.

   Found another Mac where the ptys weren't protected against me, make a
   K5 connection and transferred a largish file with Zmodem with zero
   glitches, except it was kind of slow, 84K cps. Well, we're doing
   single-character reads on the net (ttinc()'s instead of ttxin()). Hmmm,
   but then I did it again and got 2.2Mcps. Success was reported, but it
   actually didn't work; it only sent the first quarter of the file.... Oh
   well, at least now we have a testbed. 5 Jan 2007.

   Changed TRANSMIT /BINARY output buffer size from 252 to 508 to avoid
   TCP fragmentation. Need to add a SET command for this later. ckuus4.c,
   5 Jan 2007.

   Spent a day hunting around for a version of Zmodem that would build and
   execute on Mac OS X, finally found one. Now at last I could try a
   Zmodem external-protocol transfer over a secure connection. But phooey,
   C-Kermit's pty support didn't work on this box. Kermit finds master
   /dev/ptypa OK, then in ptyint_void_association() tries to open /dev/tty
   but gets ERRNO=6 "device not configured" (which is apparently OK,
   because the same thing happens on other platforms where this works),
   then tries to open slave /dev/ttypa and gets ERRNO=13 "permission
   denied" because, indeed, I don't have r/w permission on the device.
   Left a message. 4 Jan 2007.

   Made a new makefile target for Mac OS X, macosx10.4+krb5+ssl, ran it on
   Mac OS X 10.4.8. It bombs out in ckcftp.c with: ckcftp.c:551: error:
   static declaration of 'gss_mech_krb5' follows non-static declaration
   /usr/include/gssapi/gssapi_krb5.h:76: error: previous declaration of
   'gss_mech_krb5' was here". Ditto for gss_mech_krb5_old,
   gss_nt_krb5_name, and gss_nt_krb5_principal. Tried again with -DNOFTP.
   We get lots of warnings in the network modules, but they complete. But
   ck_ssl.c bombed with a conflict between its own declarations of
   encrypt_output and decrypt_input and the ones in ckuat2.h; removed the
   prototypes from the latter (as Jeff advised) it built OK and it works
   OK too. Built with FTP too, but with link-time warnings about the
   aforementioned gss_* symbols. #ifdef'd them out (gss_mech_krb5,
   gss_mech_krb5_old, gss_mech_name, and gss_mech_principal) for MACOSX,
   where these symbols are exported by the library. Now it all compiles
   and links OK, and runs OK too. 3 Jan 2007.

   Downloaded MIT Kerberos 5 v1.4.4 to Solaris 9, 54MB worth. This is just
   so I can build a Kerberized C-Kermit for testing ttyptycmd(). Ran the
   configure program, got a few warnings but it didn't fail (should it?)
   Did "make install", specifying a private directory but it failed
   immediately with "cannot stat libkrb5support.so.0.0: No such file or
   directory". OK, I tried. 3 Jan 2007.

   With Ed Ravin's help, successfully built C-Kermit with Kerberos 5 and
   OpenSSL (netbsd+krb5+openssl+zlib), but it does not make K5
   connections; it gets hung up in the Telnet negotiations. 3 Jan 2007.

   Changed copyright date to 2007. ckcmai.c, 1 Jan 2007.

   Note to myself: On Panix:

  export LD_LIBRARY_PATH=/usr/local/kerblib
  make netbsd+krb5 "K5LIB=-L/usr/local/kerblib" "K5INC=-I/usr/local/include"

   Can't telnet-k5 from newly built Kermit on NetBSD; partway through the
   negotiations, just after "TELNET RCVD SB ENCRYPTION SUPPORT DES_CFB64
   DES_OFB64 IAC SE" it dumps core. The last two lines in debug.log after
   this are:

  tn_sb[len]=5
  encrypt_support[cnt]=2

   Rebuilding with -DOPENSSL_097 doesn't change anything. Ed Ravin said
   they have two different Kerberos installations, Heimdal and MIT; maybe
   some mixup between the two explains the problem (Jeff concurs). The
   core dump occurs in ck_crp: encrypt_support():

   debug(F100,"XXX ep not NULL","",0);
   type = ep->start ? (*ep->start)(DIR_ENCRYPT, 0) : 0; <-- Here
   debug(F101,"XXX new type","",type);

   Anyway, I can log in with Kerberos 5 to Panix OK from Columbia (sesame)
   using 8.0.201. So let's try to resurrect the Solaris version with
   everything:

  solaris9g+krb5+krb4+openssl+shadow+pam+zlib

   I hunted around to find where the current library and header file
   directories were... Last time I tried this (March 2006) it bombed, not
   finding libdes. Instead we have /opt/kerberos5125/lib/libdes425.a. Made
   a new cu-specific target that includes this; now we get farther; it
   blows up in ckcftp.c with tons of errors and warnings, which we can
   worry about later. Building again with -DNOFTP, it gets to ckuath.c
   (the first security module) and:

  ckuath.c:151:18: error: krb5.h: No such file or directory
  ckuath.c:152:21: error: profile.h: No such file or directory
  ckuath.c:153:21: error: com_err.h: No such file or directory
  ckuath.c:176:28: error: kerberosIV/krb.h: No such file or directory
  In file included from /opt/openssl-0.9.8d/include/openssl/des.h:101,
                   from ckuath.c:219:

   Found krb5.h in /opt/kerberos5125/include/krb5.h, added a -I for this
   directory ... Now we get lots of warnings in ckuath.c, but it completes
   OK, then we wind up bombing out in ck_crp.c; I don't know why -- there
   are all the same warnings (related to argument passing to DES
   functions), but no errors. I have no clue.

   Tried to resurrect the solaris2x+krb4 target; this required changing
   -lkrb to -lkrb4 and -ldes to -ldes425. Lots of warnings in ckutio.c,
   ckcnet.c, ckctel.c, then it bombs out in ckcftp.c because it can't find
   krb.h. I found it, adjusted the -I flags, but now it bombs because
   krb.h itself #includes <kerberosIV/des.h>, which of course it can't
   find because the brackets mean it's looking in
   /usr/include/kerberosIV/, which, of course, the sys folks have removed.
   Giving up on Solaris again. Later, Jeff said "Solaris does not publicly
   export the krb5 libraries. You need to build the MIT Kerberos libraries
   separately and link to them." 30 December 2006.

   New makefile target for Linux with Kerberos 5, linux+krb5, that doesn't
   include anything extra from SSL or other security methods (but
   apparently it is still necessary to include -DOPENSSL_097 in order to
   get the right names for the DES routines?). Ditto netbsd+krb5 for
   NetBSD, except in this case -DOPENSSL_097 is not necessary. makefile,
   30 Dec 2006.

   Now the question of return code. In the original ttruncmd() function,
   we do a fork() and a wait(). When the external protocol program
   finishes, wait() gives us its return code and we can pass it on through
   \v(pexitstat) as well ttruncmd's own return code. But ttptycmd() has to
   interact with the pty continuously, so it can't just sit back and
   wait() for it. Instead we have to detect when the process has exited
   and then call waitpid() on the fork pid, before shutting down the pty.
   Tested on Solaris using Kermit as the external protocol and then
   inducing failure, or letting it run to completion. FAILURE and SUCCESS
   set appropriately in each case. Tested with Zmodem too, works OK except
   for the aforementioned cosmetic glitch at the end. Tested on NetBSD,
   all OK.

   To make K5 connection to Panix from Spam:

 set telnet debug on
 authenticate K5 init /realm:PANIX.COM /password:xxxxx
 set host shell.panix.com 23 /k5login

   Good... Now I try to send a file from Spam to Panix over the K5
   connection using Kermit itself as the external protocol. It fails.
   Inspection of the debug log on the far side shows that the S-Packet was
   received correctly, good! This means we are reading the clear-text
   S-Packet from the external Kermit program, and that ttol() is
   encrypting appropriately.

   The remote Kermit sends the Ack and goes to read the next packet:
   ttinl() calls myfillbuf() and:

  SVORPOSIX myfillbuf calling read()
  SVORPOSIX myfillbuf=0                <-- read returns 0
  SVORPOSIX myfillbuf ttcarr=2
  SVORPOSIX myfillbuf errno=0          <-- and reports no error
  HEXDUMP: mygetbuf read (-3 bytes)
  mygetbuf errno=0
  ttinl myread failure, n=-3
  ttinl myread errno=0
  ttinl non-EINTR -3[closing]

   This happens because myfillbuf() deliberately returns -3 when read()
   gets 0 bytes. I don't understand why this happens but the real problem
   is yet to come. The local Kermit (the one that has made the secure
   connection and is running the external protocol through ttptycmd())
   eventually figures out that the transfer failed and when we reconnect,
   we get total garbage -- the encryption either stopped happening, or got
   out of sync.

   Looking at the local debug log, ttol() is doing its job, converting the
   initial "kermit -r\13" from plaintext to cyphertext, as shown by the
   hexdumps. Then it enters ttptycmd()... Hmmmm, wait, how can it send the
   "kermit -r" before it starts the external protocol? Never mind, worry
   about that later... Anyway, ttptycmd() says:

  ttptycmd loop top have_pty=1
  ttptycmd loop top have_net=1
  ttptycmd FD_SET ptyfd in
  ttptycmd FD_SET ttyfd in
  ttptycmd nfds=5
  ttptycmd select=1
  ttptycmd FD_ISSET ttyfd in
  ...
  ttptycmd in_chk(ttyfd) n=11
  ttptycmd ttxin n=11

   ttxin() asks for 11 bytes, myfillbuf() gets 11 bytes, and hexdump()
   shows the cyphertext, there doesn't seem to be any decrypting going on.
   Hmmm, it looks like the regular code calls ttinc() in a loop, rather
   than ttxin(). Maybe ttxin() doesn't have decryption hooks. No, that's
   not it, the code is there, but the Kermit packet reader does not use
   ttxin(), it uses ttinl(). But of course we can't use that for external
   protocols because it's designed only to read Kermit packets.
   Substituting a loop of ttinc()s for the ttxin() call fixes things (and
   strangely enough, it seems to be faster). And now we have our first
   external protocol transfer over a secure connection (external Kermit
   program, Linux over Kerberos 5 to NetBSD). Zmodem worked too for a
   short file but "something happens" with longer ones. 29 Dec 2006.

   Switched the pty from buffer peeking (FIONREAD) and blocking reads to
   to nonblocking reads (O_NONBLOCK / O_NDELAY). Works just fine on NetBSD
   except now we no longer get EIO at the end when trying to read from the
   pty process that has exited. In fact, we're back to square one again.
   not ioctl(), not fcntl(), not select(), not even read() gets an i/o
   error after the pty process exits. But in NetBSD, we have to use
   nonblocking reads because ... Hmmmm, maybe switch the fd between
   blocking and nonblocking for the test... Nope, NetBSD seems to be
   hopeless (later, Ed Ravin confirmed that similar problems have been
   observed with other applications that try to do this).

   Switching to Linux, I see that yesterday's Solaris code (blocking
   reads) works exactly the same way on Linux.

   Tried today's O_NDELAY method on Solaris. It works perfectly. And then
   I moved this one to Linux and it works perfectly there too. Except in
   both cases we have the weird thing with Zmodem at the end, but I think
   that's because rz/sz don't use standard i/o. On NetBSD, it still hangs
   at the end.

   Turns out that testing the pid works in NetBSD, even though it didn't
   in Solaris. Turns out read() gets an i/o error in Solaris and Linux but
   not in NetBSD. So checking the read result first, and then checking the
   pid if read() got zero bytes catches all three. 28 Dec 2006.

   Back to Square One, single-byte reads and writes.

     * This works for both ripple and Kermit.
     * Doesn't work for Zmodem but we'll deal with that later.
     * In this case FD_ISSET(ptyfd) is still true after pty closes.

   But the ensuing read() gets EIO so we know the pty is gone. That means
   the same thing should happen in the buffered version, no? Yes; I went
   back to the buffered version and replaced all the other nonworking
   tests by a blocking read of 1 byte on the pty and this detects the
   termination. Now:

     * ripple works perfectly (of course it's only one-way).
     * Kermit fails

   Let's call the remote, forked, redirected, external Kermit A and its
   local partner B. A sends its S-packet, B receives it OK and Acks. A
   apparently does not receive the ACK in time, so sends the S again, but
   OK. followed immediately by the F. B Acks the F. A sends the A, B Acks
   it. But now A sends a piece of the previous F packet and the first
   piece of a D packet.

   Clearly the buffering is messed up. Sure enough, there was an
   extraneous statement incrementing a read pointer in a write section.
   Removing that cleared up the problems with Kermit, now we can send and
   receive substantial files efficiently in remote mode. Zmodem seems to
   work too, except that at the beginning a bunch of "**B0800000000022d"'s
   are stuffed into Kermit's command buffer, so after the transfer we get
   some error messages.

   In local mode, over a Telnet connection, Kermit works fine. Zmodem
   works OK too except it doesn't finish right, so at the very end rz on
   the far end is still waiting for something; if I cancel out of it with
   ^X^X^X^X^X, it deletes the file. So there still is something wrong with
   the termination test.

   Also you don't see anything on your screen when running Kermit or
   Zmodem this way. That's to be expected, since they are using stdio for
   the transfer, so they can't also be displaying progress or other
   messages.

   Built this on NetBSD again... Seems to work this time, but has trouble
   finishing, like Zmodem. Hmmm, on closer examination, it turns out that
   since in_chk() always returns 0 on the ptyfd, we fall into our new
   single-byte read code, so it's really slow, like 10K cps on a
   connection where 1M is the norm. 27 Dec 2006.

   Debugging yesterday's code... Still, the error conditions are never
   set, we never detect when the pty closes. In Solaris, if select() says
   ptyfd is ready to read but in_chk() says there are no characters there,
   we can treat this as a loop-exit condition. But in NetBSD, in_chk()
   always says 0 when used on a pty (but works OK on a serial or net
   connection).

   Realized I could not use in_chk() on the pty because there is too much
   baggage with the communication path -- myread(), etc etc) -- so I
   replaced this with a simple ioctl(ptyfd,FIONREAD,&n). This works fine
   in Solaris but always returns 0 in NetBSD, despite what the man page
   says (i.e. that this function can be used on any file descriptor).

   OK, let's see.... select() does not return useful results. It says
   characters are waiting on ptyfd when they are not, and it never detects
   the closure of the pty..... Well of course not, because we are the ones
   who have to close it. Just because the process has stopped doesn't mean
   the pty is closed. So we're back to square one, how do we know when to
   close it? ckupty.c seems to keep the process ID in a global variable,
   pty_fork_pid (which is not the same as the pid now returned by
   do_pty(), which is useless, but I don't understand why). But it doesn't
   matter because when we kill(pty_fork_pid,0), we still get no error of
   any kind, even after we know the process has exited. I am completely
   flummoxed. select() lies, and even if it didn't, there is simply no
   completion criterion. In the loop, select() always says that the pty is
   ready to read. To be continued. 26 Dec 2006.

   Changed single-character read() and write() to buffered reads and
   writes, with ttxin() and ttol() used for network i/o. Using Kermit as
   the external protocol, this gives 450Kcps (about 1/3 normal on this
   connection).

   But now there's a problem: the loop doesn't know when to stop. How does
   it know when the process that is running on the pty has exited? With
   single character read()'s that are executed unconditionally when
   select() says the pty has data waiting, as in the first pass, I get EIO
   if there actually isn't any, and can exit the loop. But now, to avoid
   blocking, I call in_chk() to see how much data is waiting, and I don't
   try to read anything if it says nothing is waiting. If the process
   associated with the pty file descriptor has terminated, in_chk() would
   presumably get some kind of error, but it doesn't. I changed do_pty to
   return the pid of the fork where it execs its command so we can check
   the pid with kill(pid,0) when in_chk() of the pty says 0, but this
   doesn't help either; it seems like the process is not exiting, but of
   course it is.

   I could not find any legitimate way to test when the pty fork
   terminated. Select() always says the pty file descriptor was ready, no
   matter what. Select() never reports an exception on the pty file
   descriptor; in_chk(ptyfd) returns 0 and not an error. read(ptyfd,...)
   gets 0 but not an error. fcntl(ptyfd,...) doesn't get an error. Finally
   I tried write(ptyfd,c,0) and this indeed gets EIO (i/o error). With
   this, using Kermit as the external protocol works fine in Solaris but I
   tend to think this trick will not be very portable (it isn't). 24 Dec
   2006.

   Made ttptycmd() use a more intelligent buffering scheme, fixed a few
   things about how I was setting up the select() call that should address
   some of yesterday's problems. Still doesn't work but it's progress. A:
   25 Dec 2006.

   Created a new version of ttruncmd() called ttyptycmd(), which works by
   calling do_pty() to get a pty to run the command on, and then in a
   loop, reads from the pty and writes to the net and reads from the net
   and writes to the pty, using select() to which of those it should do on
   each pass. First cut just uses single-byte reads and writes. Tested
   using Kermit itself as an external protocol. Works but slowly: 6000cps.
   Zmodem doesn't work at all. ckutio.c, 24 Dec 2006.

   Parameterized pty routines and all references to them for file
   descriptor, rather than to use global ttyfd, thus allowing ptys to be
   created for different purposes. Tested on Solaris 9 and Mac OS X
   10.4.8, with "set host /connect /pty emacs" (fine in both cases), and
   (more to the point) "set host /connect /pty kermit" -- here we make a
   connection from one Kermit process to another and transfer a file;
   works fine and wasn't especially slow either; a good sign. ckcdeb.h,
   ckutio.c, ckupty.c, 22 Dec 2006.

Dev.27

   Built on VMS 7.3-2/Alpha. Had to squelch a couple compiler warnings by
   changing some ints in the new \fpictureinfo() code from unsigned to
   signed, and fix a typo in the prototype for the new gettcpport()
   function. ckcnet.h, ckuus4.c, 22 Dec 2006.

Dev.26

   Built on Mac OS X 10.4.8 and NetBSD 3.1_RC3, all OK. 19 Dec 2006.

   When downloading with FILE DESTINATION NOWHERE (= /CALIBRATE), Kermit
   still checked the size of the incoming file and refused it if there
   wasn't enough free disk space, on platforms (such as VMS) where
   zchkspa()) actually works; reported by Bob Gezelter. ckcfn3.c, 18 Dec
   2006.

   Added the obvious timeout checks for FTP uploads, but I have no way to
   test the code since our misbehaving FTP server does not hang when
   receiving files, only when sending them. But uploads work both with and
   without a timeout set, so at least no harm is done. ckcftp.c, 17 Dec
   2006.

   Checked FTP timeout on command channel with FTP DIRECTORY of a big
   directory using a path into our ftp server that preserves the hanging
   behavior. The timeout was actually working, but the failure condition
   wasn't propagating back to the user, and there was no error message.
   Fixed in doftprecv2() and failftprecv2(): ckcftp.c, 15 Dec 2006.

   Changed \fkeywordvalue() to accept a string rather than a single word
   as its second argument, so that more than one separator could be
   specified, and to return -1 on error, 0 if it found nothing, 1 if given
   a keyword but no value, and 2 if there was a keyword and a value.
   dokwval(): ckuus[24].c, 14 Dec 2006.

   Some casts for the 3 interior args of the new select() call in ckcftp.c
   for HP-UX 9. 14 Dec 2006.

Dev.25

   Removed a debug() statement from zsattr() that suddenly started making
   some version of gcc complain, reported by Gerry Belanger. ckufio.c, 13
   Dec 2006.

   Fixed a bug in the INPUT /COUNT: parser: the array of search strings
   was never initialized, which didn't matter before, but with /COUNT:, if
   the first element was not a NULL pointer, we'd treat it as a search
   string, and then if it happened to match something in the input stream,
   the operation would stop before the count was exhausted. Fixed by (a)
   initializing the array, and (b) ignoring any search strings if /COUNT:
   was given. ckuusr.c, 13 Dec 2006.

Dev.24

   This morning the Columbia FTP server was malfunctioning in a perfect
   way for me to implement and test an FTP timeout mechanism. The server
   would close the data connection after sending the file, but the client
   never saw the close and was stuck forever in a recv(). I added code to
   do a select() on the data connection prior to entering the recv(), with
   a timeout on the select() that the user can establish with SET FTP
   TIMEOUT. Built and tested on Solaris 9, clear-text FTP. Also built
   cleanly for FTPS and tested against a server that does not hang; I
   don't have access to an FTPS server that would tickle the timeout code.
   ckcftp.c, 11 Dec 2006.

   Made "help locus" a synonym for "help set locus". ckuusr.[ch],
   ckuus2.c, 11 Dec 2006.

   Supplied a missing comma in the help-text array for HELP SET TERMINAL,
   which resulted in bad formatting in K95 around SET
   SNI-FIRMWARE-VERSIONS. ckuus2.c, 10 Dec 2006.

   Built OK with SSL/TLS. Tested with the POP script, found that I broke
   INPUT when adding the /COUNT feature; there was a path through the code
   that could leave the "anychar" variable unset and therefore random.
   Fixed in doinput(). The POP script, which does not use /COUNT, works
   again and so does a new CGI script, which does use /COUNT. ckuus4.c, 10
   Dec 2006.

   There was a bad bug in the date-parsing routines; it's been there for
   years. If a date string includes a timezone, e.g. "Sat, 9 Dec 2006
   19:26:23 EST", and converting to GMT changes the date, the variables
   for day, month, and year (which are used later) were not updated, and
   the final result was a day off. Fixed in cmcvtdate(): ckucmd.c, 10 Dec
   2006.

   For communication protocols: INPUT /COUNT:n to read exactly n
   characters without any matching. Can be used, for example, with
   CONTENT_LENGTH in CGI scripts; NUL characters are counted but not
   collected. ckuusr.[ch], ckuus4.c, 8 Dec 2006.

   Changed RENAME /COLLISION:PROCEED to be /COLLISION:SKIP, which is
   clearer. ckuus[26].c, 8 Dec 2006.

   Added \ffunction(s1) to tell if a given built-in function is available.
   ckuus[24].c, 8 Dec 2006.

   Added \fcount(s1,s2) to tell the number of occurrences of s1 in s2.
   ckuus[24].c, 8 Dec 2006.

   Added an optional 4th argument to \findex(), \frindex(), \fsearch(),
   and \frsearch(): the desired occurrence number of the searched-for
   string. \frsearch() was a bit tricky. ckuus[24].c, 7 Dec 2006.

   Fixed a bug in SET TELNET PROMPT-FOR-USERID, SET AUTH KERBEROS[45]
   PROMPT, and SET AUTH SRP PROMPT in which the user's string was compared
   with a literal (s == ""), reported by Pavol Rusnak. Worse, empty
   strings (if the test succeeded) were turned into null pointers, and
   then fed to strlen(). Fixed in ckuus3.c, 5 Dec 2006.

Dev.23

   Added COPY /OVERWRITE:{ALWAYS,NEVER,OLDER,NEWER} to control name
   collisions when copying across directories. ckuus[26].c, 1 Dec 2006.

   This would be a nice elegant way to loop over a bunch of files, if it
   worked:

for \%i 1 \ffiles(*) 1 { rename \fnextfile() xxx_\flpad(\%i,3,0) }

   But in this loop, Kermit skips every other file (beginning with the
   first) and then runs out of files halfway through the loop. Why?
   Because in commands like RENAME and DELETE, the filename parser is in a
   chained FDB with the switch parser. First the switch parser, cmswi(),
   gets its hands on \fnextfile(), passing it through the evaluator and
   thus getting the first filename, which it then sees is not a switch, so
   now the field is parsed by the next parser in the chain, cmifi(), which
   causes \fnextfile() to be executed again. In fact, the FOR loop has
   nothing to do with it; the same thing happens like this:

void \ffiles(*)
delete \fnextfile()

   This deletes not the first file, but the second one. Obviously users
   can be told not to refer to \fnextfile() in chained-fdb fields:

for \%i 1 \ffiles(*) 1 { .f := \fnextfile(), delete \m(f) }

   but this is hardly intuitive. I had some clever ideas of how to make
   \fnextfile() work as expected in this context but it's way too much
   magic. Better to simply document that \fnextfile() is "deprecated" and
   the array format should be used:

  for \%i 1 \ffiles(*,&a) 1 { delete \&a[\%i] }

   The difference is, an array element doesn't change every time it's
   referred to!

   Added a /PRESERVE switch to the COPY command to preserve the timestamp
   and permissions of the file. I did this using the Kermit APIs so it
   should work for any version of C-Kermit or K95. ckuus[26].c, 30 Nov
   2006.

   If we include file selectors with DIR /ARRAY:&a and some of the files
   that match the given filespec but don't fit the selectors, the array's
   dimension is bigger than its number of elements. Added code at the end
   of domydir() to resize the array so \fdim() returns the number of
   filenames in the array, and also made sure that element 0 contains that
   number too. ckuus6.c, 30 Nov 2006.

   Next problem: when chkarray() returns 0, this should not be interpreted
   to mean the array does not exist. Looks like the only place this
   happened was in \fcontents(); fixed in ckuus4.c, 30 Nov 2006.

   The other problem was that dclarray(), when called with an array name
   and a dimension of zero, does two different things depending on whether
   the array already existed. There is still a fair amount of confusion
   about whether a dimension of 0 indicates an array with 1 element (as it
   should) or a nonexistent array. We call dclarray() with a size of 0 to
   undeclare an array but we also need to able able to declare an array
   with only element 0. I changed dclarray() to treat a negative dimension
   as a command to destroy the array, and 0 or positive as a command to
   create the array with the given dimension. ckuus[r56].c, 30 Nov 2006.

   DIR /ARRAY:a filespec, when the filespec does not match any files,
   terminates with the array undeclared. It would be better to return a
   declared but empty array (\&a[0] = 0). The code is already there to do
   that, but isn't working. And yet "declare \&a[0]" does indeed create a
   0-element array ("show array" shows a dimension of 0). Turns out there
   were two problems; one was the careless recycling of a local variable
   ("array"), resulting in failure to create \&a[] (but not any other
   array). Fixed in domydir(): ckuus6.c, 30 Nov 2006.

   From to-do list: Make a way to inhibit pattern matching in SWITCH
   labels. It's already there; just quote the wildcard characters; the
   only trick is that for some reason (such as that SWITCH is really an
   internally defined macro), a double quote is needed:

switch \%1 {
  :a\\*z, echo literally "a*z", break
  :abcxyz, echo literally "abcxyz", break
  :a*z, echo a...z, break
  :default, echo NO MATCH
}

   In first case, the asterisk is taken literally; in the third it's a
   metacharacter and the label matches any string that starts with 'a' and
   ends with 'z'.

   Array initialization would quit early if any initializers were
   undefined, e.g. "decl \&a[] = \%a \%b \%c" would stop at the first
   element if \%b was not defined, even though \%c might be defined. Fixed
   in dodcl(): ckuusr.c, 30 Nov 2006.

   The meaningless Lisp command (=) would cause Kermit to hang. Due to
   some idiosyncracy in the parser, it would see this as ((=) and would go
   into "wait for the closing paren" mode. There was already a hack in the
   code to compensate for this, but it didn't work. I fixed the hack but I
   don't understand the real problem. Anyway, comparing Kermit with real
   (Franz) Lisp I discovered that comparison operators do not require two
   arguments, as Kermit has been doing, although they do require at least
   one. I changed Kermit to not require two, so now all the comparison
   predicates behave exactly like Franz Lisp, including getting an error
   if there are no args). ckuus[r3].c, 29 Nov 2006.

   This was impossible: def \%1 upper, echo \f\%1(abc) -- i.e. to
   "compose" a function name. Fixed in zzstring(). But note that it's
   still not possible to do this: def \%1 \fupper, echo \%1(abc) --
   because at the point where "\fupper" is encountered, which is
   automatically fed to fneval(), the argument list hasn't been read yet.
   ckuus4.c, 29 Nov 2006.

   SHOW CONNECTION didn't show the TCP port number. This command works by
   parsing the current connection log entry string, which doesn't have a
   field for this, but which sometimes shows the port number as part of
   the hostname (but more often not). Added code to dolognet() to log the
   TCP port number, if known. This involved adding a gettcpport() function
   to ckcnet.c. ckcnet.[ch], ckuus3.c, 29 Nov 2006.

   SHOW CONNECTION for an SSH connection said the connection type was
   "NET" rather than "SSH". Fixed in dolognet(): ckuus3.c, 29 Nov 2006.

   DIRECTORY /BRIEF ignored file selection switches and always listed all
   files. This was because of how I cleverly called filhelp() (the routine
   that lists matching files when ? is typed in a filename field) and, of
   course, filhelp() doesn't know anything about the DIRECTORY command's
   file selections. Changed filhelp() to accept all the args needed for
   passing along to fileselect(), renamed it to xfilhelp(), and made a
   filhelp() stub that chains to xfilhelp() with null selections.
   ckcker.h, ckucmd.[ch], ckuus6.c, 29 Nov 2006.

   Built OK on Red Hat Linux AS4 with both "make linux" and "make
   linuxnc". 15 Oct 2006.

Dev.22

   PeterE noticed that if you FOPEN a file, do some seeks or reads, then
   FCLOSE it, then FOPEN it again (or open a different one), some of the
   old information is still there (e.g. current line number). This is an
   artifact of the changes of May 4th. Now the file closing and opening
   routines are a bit more careful about scrubbing and initializing the
   file info struct. ckuus7.c, 12 Oct 2006.

   Added a TOUCH command that does what UNIX touch does: creates the file
   if it does not exist, updates the timestamp if it does. If a wildcard
   is given, it operates only on existing files. It shares the DIRECTORY
   command parser, so all the same file selection switches can be given.
   ckuusr.[ch], ckuus[26].c, 12 Oct 2006.

   Fixed unguarded reference to dialmsg[] for \fdialmessage(), noticed by
   Gerry Belanger. ckuus4.c, 12 Oct 2006.

   The new RENAME command didn't work if both the source and destination
   names included directory segments, e.g. "rename /tmp/foo ~/bar" (see
   notes of 4 May 2006). This was fixed in renameone() by a special case
   in which the second argument is given but it is a filename, not a
   directory name. ckuus6.c, 11 Oct 2006.

   Built with OpenSSL 0.9.7l on Solaris 9. Built with OpenSSL 0.9.8d on
   Solaris 9; connects and logs in to a secure site. 11 Oct 2006.

   Added a debug statement to ftp_hookup() to record the TCP port that was
   used. ckcftp.c, 11 Oct 2006.

   Added netbsd+openssl target to makefile. Built OK (NetBSD 3.0, OpenSSL
   0.9.7d) except with some warnings in ck_crp.c. Connects and logs in OK
   to a secure site. 10 Oct 2006.

Dev.21

   Built on Solaris9/Sparc; FreeBSD 6.2/AMD64; NetBSD 3.0/i386; HP-UX 11i
   v2; SCO OSR6.00.

   Soewono Effendi sent code for exit sequence to leave DTR on; this
   amounted to unsetting HPUCL in c_cflag. I did it a simpler way,
   hopefully portable to all Unixes, but who knows at this late date. The
   code is inside #ifndef CK_NOHUPCL..#endif in case it causes trouble. It
   is executed if SET EXIT HANGUP is OFF and a serial port was open at the
   time Kermit exits (or closes it explicitly). ttclos(): ckutio.c, 6 Oct
   2006.

   Suggested by Jim Crapuchettes: \v(dialmessage) is the text string
   corresponding to \v(dialstatus). ckuusr.h, ckuus4.c, 6 Oct 2006.

   Added a missing definition for LOCK_DIR in the Linux HAVE_BAUDBOY case,
   suggested by Gerry Belanger. ckutio.c, 6 Oct 2006.

   Build on Solaris 9 and NetBSD 3.0, 24 Aug 2006.

   Added DIR /NOLINKS, which means don't show or count symlinks at all.
   ckuusr.h, ckuus[r26].c, 24 Aug 2006.

   DIR /FOLLOWLINKS and /NOFOLLOWLINKS always did the same thing; the
   switch was ignored, a symlink is always followed. Fixed in ckuus6.c, 24
   Aug 2006.

   Added HDIRECTORY as an invisible synonym for DIR /SORT:SIZE /REVERSE.
   Can be used with other switches, of course, so (e.g.) HD /TOP shows the
   ten biggest files. ckuusr.h, ckuus[r26].c, 24 Aug 2006.

   Added DIR /COUNT:v to count the number of files that match the given
   criteria and store result in the variable v. ckuusr.h, ckuus[r26].c, 24
   Aug 2006.

   Fixed DIR /TOP to work if the /TOP:n argument was omitted, defaulting
   to 10. domydir(): ckuus6.c, 12 Jul 2006.

   The new RENAME command didn't give very good error messages, e.g. if
   the filespec didn't match any files. Fixed in dorenam(): ckuus6.c, 12
   Jul 2006.

   It is unhelpful when Kermit gets a syntax error in the middle of a big
   compound statement block (e.g. FOR or WHILE loop) and dumps out the
   whole thing in an error message. I changed the two places where this
   can happen to call a new routine that, instead of dumping out the
   entire cmdbuf, checks its length first and if it's more than a line
   long, truncates it and adds an ellipsis. ckuus6.c, 12 Jul 2006.

   On 29 Nov 2005 I changed IF KERBANG to solve a problem (see entry for
   that date), but introduced a new one; namely that you can't have (e.g.)
   a FATAL macro that uses IF KERBANG to decide whether to EXIT all the
   way or STOP back to the prompt. Changed it again, this time to require
   not that the command level be 1, but that the command *file* level be 0
   (i.e. that we are in the top-level command file, irrespective of the
   command or macro level, but not in a subfile). ckuus6.c, 12 Jul 2006.

   Make \fkeywordval(xxx) undefine xxx (i.e. when a keyword is given with
   no value). This way command-line keywords will always override
   preexisting default definitions, whether they have a value or not,
   which makes it easier to parse command lines like "foo=bar blah xx=yy".
   ckuus[24].c, 12 Jul 2006.

   Added #ifdef SV68, #include <unistd.h>, #endif because Unix System V/68
   on Motorola choked on the SEEK_CUR reference without it. ckuus4.c, 10
   Jul 2006.

Dev.20

   Added \v(lastkwval) so we can retrieve programmatically the keyword
   most recently processed by \fkeywordval(). ckuusr.h, ckuus4.c, 9 Jul
   2006.

   The "where-did-my-file-go" message seemed to be ending with a LF rather
   than CRLF, probably because the terminal modes had not yet been
   restored, leaving the next prompt hanging below it, rather than on the
   left margin, if C-Kermit exited immediately after the transfer. Fixed
   by changing all \n's to \r\n's in wheremsg(): ckcpro.w, 8 Jul 2006.

   Added \fgetpidinfo(n) to return info about a process ID; for now it
   simply returns 1 if the process is alive and 0 if not (or -1 if the
   argument is bad or missing or on any kind of error). ckuusr.h,
   ckuus[24].c, 7 Jul 2006.

   Discovered that it was not obvious what pattern to use to match strings
   enclosed in square brackets. "if match [abc] \[*\]" didn't work.
   Neither did various other tricks like NCRs for the brackets. However,
   "if match [abc] \\[*\\]" does work. Trying to fix this would no doubt
   break 100 other things, so let's call it a feature. 7 Jul 2006.

   Fixed \fstripb() to not dump core if second argument is missing.
   ckuus4.c, 7 Jul 2006.

   Sometimes we want to check if a file's status before we've FOPEN'd it,
   in which case the channel variable is likely to be empty and
   \f_status(\%c) would get an error. Making the obvious change didn't fix
   this, however. It turns out that the function evaluator failed to
   adjust argn (argument count) when trailing arguments were empty, and
   argn was being used in this case, and probably others, to test whether
   an argument existed. I added code to adjust argn to reflect the number
   of arguments up to and including the rightmost non-empty one. ckuus4.c,
   7 Jul 2006.

   Noticed that \fkeywordvalue(foo=this is a string) only kept the first
   word. Fixed it to keep the whole definition. Also added \fkwvalue() as
   a briefer synonym. ckuus4.c, 7 Jul 2006

   Changed the numeric comparisons = < > <= >= != to allow long integers
   by changing the data type to CK_OFF_T, etc. ckuus6.c, 7 Jul 2006.

   Changed name of \fpicture() to \fpictureinfo() and added help text. By
   the way, ImageMagick can do this too: identify -format "%w %h"
   dscf0520.jpg. The advantage of having it in Kermit is that not
   everybody has ImageMagick. ckuus[24].c, 7 Jul 2006.

   Added help text for FTP RESEND and REPUT and amended RESEND help text.
   ckcftp.c, ckuus2.c, 7 Jul 2006.

   Added FTP REPUT and FTP RESEND since previously there was no
   FTP-prefixed command for recovering uploads, only the regular RESEND
   command, which might not have been obvious to people. ckcftp.c, 7 Jul
   2006.

   Tested FTP PUT big file against Tru64, OK. Ditto FTP RESEND big file:

  C-Kermit>resend BIGFILE
   PUT BIGFILE (binary) (3000000001 bytes)---> PASV
  227 Entering Passive Mode (15,170,178,171,13,186)
  ---> SIZE BIGFILE
  213 343211280
  ---> MDTM BIGFILE
  213 20060707141243
  ---> APPE BIGFILE
  150 Opening BINARY mode data connection for BIGFILE (128.59.59.56,45470).

   Made REPUT a synonym for RESEND. ckuusr.c, 7 Jul 2006.

   Checked FTP GET of large file in ASCII mode against Tru64 FTP server.
   It was fine, and there was no delay in the server's response to our
   SIZE command (as there would be if it were scanning the entire file to
   count how many bytes would be required to send it in text mode). 7 Jul
   2006.

   Checked current code on VMS 8.2-1 on IA64 / UCX 5.5, builds fine. No
   changes. Updated listing at HP. 6 July 2006.

   Scott Kasten reports that the FTP client can transfer large files OK,
   at least in Linux, but has trouble with recovery:

     * Kermit takes a very long time to start the transfer, sometimes over
       30 minutes. Suspect the ftp server is counting the bytes in a long
       file? Or maybe it's a text-mode transfer and it's counting the
       lines? Probably in response to Kermit's SIZE command.
     * The size shown in the FT display is wrong by a random amount. And
       of course so are the progress bar, percent done, and time
       remaining.
     * The file, however, is transferred correctly. REGET works correctly
       too.

   I tried setting up a test scenario locally but our Solaris FTP server
   does not support large files:

  FTP SENT [SIZE BIGFILE]
  FTP RCVD [550 BIGFILE: not a plain file.]
  FTP SENT [PASV]
  FTP RCVD [227 Entering Passive Mode (128,59,48,24,246,37)]
  FTP SENT [RETR BIGFILE]
  FTP RCVD [550 BIGFILE: Value too large for defined data type.]

   Created the same 3GB on a Tru64 Unix system that allows FTP access.
   Made the connection from C-Kermit on Solaris (32-bit with LFS):

  16:46:12.908 FTP SENT [SIZE BIGFILE]
  16:46:12.947 FTP RCVD [213 3000000001]

   Note that it takes less than half a second to get the reply. Now I
   start the download and then interrupt it at about 2%:

  16:46:12.979 FTP SENT [TYPE I]
  16:46:13.174 FTP RCVD [200 Type set to I.]
  16:46:13.226 FTP SENT [PASV]
  16:46:13.262 FTP RCVD [227 Entering Passive Mode (15,170,178,171,11,37)]
  16:46:13.299 FTP SENT [RETR BIGFILE]
  16:46:13.337 FTP RCVD [150 Opening BINARY mode data connection for BIGFILE..]
  16:47:24.895 FTP RCVD [426 Transfer aborted. Data connection closed.]
  16:47:24.934 FTP RCVD [226 Abort successful]
  16:47:24.991 FTP SENT [MDTM BIGFILE]
  16:47:25.028 FTP RCVD [213 20060706204458]

   Now I do a REGET:

  16:51:55.321 FTP SENT [PASV]
  16:51:55.357 FTP RCVD [227 Entering Passive Mode (15,170,178,171,11,43)]
  16:51:55.394 FTP SENT [REST 122736640]
  16:51:55.430 FTP RCVD [350 Restarting at 122736640. Send STORE or RETRIEVE..]
  16:51:55.431 FTP SENT [RETR BIGFILE]
  16:51:55.469 FTP RCVD [150 Opening BINARY mode data connection for BIGFILE..]

   This worked perfectly, as far as I can tell; the FT display picked up
   in the right place; the thermometer, percent done, and estimated time
   remaining were the same as when we left off last time. I did the same
   thing several more times, everything was OK. It would have taken a
   really long time to let this run to completion, but I think this
   demonstrates that Scott's symptoms are server-dependent. No changes. 6
   July 2006.

   Added a new function for dealing with JPGs and GIFs:

   \fpicture(filename,&a)
  returns 0 if file not recognized or can't be opened;
  returns 1 if landscape, 2 if portrait or square.
  If array given, element 1 is width, element 2 is height.

   ckuusr.h, ckuus4.c, 19 Jun 2006.

Dev.19

   Scott Kasten noted that the estimated-time-remaining calculation would
   go bonkers on LFS systems when RESENDing a large file. It looks like
   the shocps() and shoetl() functions escaped the CK_OFF_T conversion. I
   made what seemed to be the right adjustments, and then was lucky enough
   to find a computer that had enough free disk space for me to send a
   large file, interrupt it several times, resend it, all seems to be OK.
   28 May 2006. Later Scott verified these changes independently for
   Linux, but the problems in IRIX remain.

   Patches from Scott Kasten for large files on IRIX 6.5: ckcdeb.h,
   makefile, 12 Jun 2006.

   Fixed the tru64-51b+openssl target -- the terminating doublequote of
   KFLAGS was missing -- and also the osf target, which failed to import
   the LIBS definition from whatever other target invoked it. Now the SSL
   build goes OK on Tru64 5.1B. Replaced x.tar.z in the download areas
   without declaring a new Dev number. The new one has a makefile with
   today's date. Software engineering at its best! makefile, 18 May 2006.

   PeterE got a warning in the new FILE OPEN code when building in HP-UX
   9. I added a cast, built on HP-UX 11, no more complaint. However there
   are warnings about internal vs external bindings of sendpath and
   sendfile in every module. Too bad, these are not Kermit tokens, it's a
   conflict in HP's header files. Marc Sapiro doesn't see them; probably
   it's something on the HP testdrive site. ckuus7.c, 17 May 2006.

   I wanted to test large files against RESEND but I don't have access to
   any system that can run C-Kermit and that also has enough space for a
   large file. I created a "fake" large file on Linux (3G hole plus 1
   byte), and sent it over a localhost connection, and interrupted it
   repeatedly and then initiated a RESEND at the sender. In each case, it
   picked up where it left off. But before the 2G boundary was crossed the
   disk filled up. Inconclusive. 14 May 2006.

Dev.18

   Built on VMS 7.2-1, tested new RENAME command there; seems to be OK. 13
   May 2006.

   Fixed RENAME /LOWER and /UPPER, when given with no colon or argument,
   to default to ALL. ckuus6.c, 13 May 2006.

   Ran my old BUILDS script that builds C-Kermit with about 100 different
   combinations of feature-selection switches. Fixed a few small glitches
   so now they all build OK (except can't do NOANSI builds any more on
   recent Linuxes because of varargs()). ckuus3.c, ckuus5.c, ckuus6.c,
   ckuus7.c, ckucmd.c, ckcfns.c, 6 May 2006.

   "Tom Violin" (Tom Hansen) noticed that the first time you FOPEN a file,
   Kermit's memory consumption goes way up. In fact there's a warning to
   that effect in the code, where, upon first open, a potentially big
   array of potentially big structs is allocated. I rewrote the code to
   allocate each array member (struct ckz_file) as needed, i.e. when a
   file is opened, and to free it when the file is closed (or the open
   fails). This was actually quite a lot of work, which is why I didn't do
   it the first time around: every single "." had to be changed to "->".
   Every check for a valid channel first had to check if the channel's
   struct was allocated and every other reference to z_file[i]->anything
   had to be prechecked that z_file[i] was not a NULL pointer. Also I made
   some improvements to FILE STATUS, and I fixed FILE CLOSE to default the
   channel number if only one channel was open, as I did for FILE STATUS a
   while back. ckuus7.c, Cinco de mayo 2006.

   Added HELP SET RENAME and updated HELP RENAME. ckuus2.c, 4 May 2006.

   Added code to handle the case where the file being renamed includes a
   path specification. In this case we separate the path, apply the
   renaming functions to the filename only, and then at the end rejoin the
   original filename with the path, and join the new name with same path
   or, if a destination directory was given, with that. ckuus6.c, 4 May
   2006.

   Filled in the second one ("all but" the given occurrence). The
   algorithm is simply to reverse the three strings and then use the same
   code as we use in the left-right-case, and then unreverse the result.
   At first I used yystring() for this but yikes, what a bad design! So I
   made a better string-reversal routine, gnirts(), for this (luckily
   yystring() is only used in one place, for which its design is
   appropriate). ckuus6.c, 3-4 May 2006.

   Added an "all-but" control to the /REPLACE options:
   /REPLACE:{{.}{_}{~1}} means replace all but the first (this one works);
   /REPLACE:{{.}{_}{~-1}} means replace all but the last (this one not
   yet). ckuus6.c, 2 May 2006.

   Added RENAME /FIXSPACES to change all spaces in the filename(s) to
   underscore or any other character or string that is given. This is just
   a special case of RENAME /REPLACE:{{ }{x}} with easier syntax.
   ckuusr.h, ckuus6.c, 2 May 2006.

   Conditionalized some Unix/Windows assumptions in renameone() so the
   code could work in VMS. ckuus6.c, 2 May 2006.

   Added SHOW RENAME. ckuusr.h, ckuus[r5].c, 26 Apr 2006.

   Back to /CONVERT... Once I was able to get the code to call cvtstring()
   I was able to debug it (at first it was skipping every second
   character). And now we have a general-purpose string-translating
   function we can call from anywhere. Requires that C-Kermit be built
   with Unicode support. ckuus6.c, 26 Apr 2006.

   I thought I had a function to convert the character set of a string but
   I don't, so actually implementing /CONVERT: will be difficult.

   Actually the parsing wasn't that easy either. It works OK
   interactively, but not in a TAKE file. To make a long story short, I
   had to change gtword() and cmkey2() to not require "/" at the beginning
   of a switch, and then to parse
   arguments-that-are-followed-by-other-arguments as if they were
   switches, so that they can end with colon rather than space. This might
   seem dangerous, but switches always have "/" at the beginning, so the
   check is superfluous. ckucmd.c, 26 Apr 2006.

   Experimented with parsing for /CONVERT:cset1:cset2. The problem here is
   that there is no straightforward way for a switch to have multiple
   arguments. Or is there...? If I parse cset1 with cmswi() rather than
   cmkey(), it almost works; the only problem is that the character-set
   keywords don't have CM_ARG set, so they don't know to stop on, and
   ignore, a colon. If I make a copy of the table and set CM_ARG in the
   flags field for each keyword, it works fine: if I Tab in the first
   name, it fills itself out, supplies a colon, and waits for the second
   name. So in the code, the first time that RENAME /CONVERT is invoked, I
   put code to copy fcstab[] and set CM_ARG in each flags field. Works
   fine, and now we know how to make a switch that takes multiple
   arguments. ckuus6.c, 24 Apr 2006.

   Worked on RENAME /COLLISION:FAIL. I decided it was less than useful to
   ...

   Added SET RENAME { COLLISION, LIST } to let user change default
   collision and listing actions. ckuusr.[ch], ckuus[36].c, 25 Apr 2006.

   Added RENAME /COLLISION:{OVERWRITE,PROCEED,FAIL}. This is implemented
   but not tested. ckuus6.c, 24 Apr 2006.

   Changed /REPLACE options to allow a negative number to specify an
   occurrence from the right, so -1 means the last occurrence, -2 means
   the next-to-last, etc. ckuus6.c, 24 Apr 2006.

   Added RENAME /SIMULATE. Filled in the code for string replacement,
   needs testing. ckuus6.c, 20 Apr 2006.

   Filled in actions for RENAME /UPPER: and /LOWER: for the single file
   case, and tested all combinations of switch values and filename
   configurations. Once that was OK, moved the code out into a separate
   routine, renameone(), and then called it from both the single-file case
   and the multifile case. ckuus6.c, 19 Apr 2006.

   Added parsing for RENAME /UPPER:option (to uppercase the file name(s)),
   /LOWER:option (to lowercase), and /REPLACE:{{s1}{s2}} (to do string
   replacement on the filename(s)), but not the semantics. When any of
   these switches is given, the target ("to") name is not parsed; they act
   on the source name. The /LOWER: switch takes keyword args to specify
   whether it should act only only files that have all UPPER case latters,
   or on ALL files (i.e., including files with mixed-case names);
   similarly for the /UPPER: switch. There is some creative parsing
   allowing these to be given with or without a colon and keyword
   argument, which works fine except if you include the colon but no
   argument, execute the command (which works fine), and then recall the
   command. I haven't yet decided about the interaction among these
   switches. Clearly if /UPPER is given after /LOWER, it overrides. But if
   /UPPER (or /LOWER) is given with /REPLACE, what should happen?
   ckuus6.c, 17 Apr 2006.

   Discovered that the RENAME command could be entered without any
   arguments and it would still succeed. Fixed in dorenam(): ckuus6.c, 17
   Apr 2006.

   Added RENAME switch values that can be used in the same table with the
   DELETE switch values, which are shared by many commands. ckuusr.h, 17
   Apr 2006.

   To make the RENAME command a bit more useful, need to add some
   switches. But it shares a switch table, qvswtab[], with some other
   commands. Broke this off into its own switch table. ckuus6.c, 17 Apr
   2006.

   Added SET SEXPRESSION TRUNCATE-ALL-RESULTS { ON, OFF }. This can be
   used for force integer arithmetic in any kind of calculation that
   requires it, such as date calculations. This is a global setting, not
   on any kind of stack. Also, updated SHOW SEXP and added HELP SET SEXP
   which wasn't there before. ckuus[23].c, 30 Mar 2006.

   Tried resurrecting the solaris2xg+krb5+krb4+openssl+shadow target. It
   asks to link with libdes but there is no libdes. Removed -ldes from the
   target, now at least it builds and runs wart. The compilation blows up
   in ckcftp.c for missing header files:

  ckcftp.c:462: kerberosIV/krb.h: No such file or directory
  ckcftp.c:500: gssapi/gssapi_generic.h: No such file or directory
  ckcftp.c:501: gssapi/gssapi_krb5.h: No such file or directory

   Got a bit farther by adding appropriate -I's and -L's to KFLAGS but it
   still dies compiling (or linking?) ckcftp.c, but it doesn't say exactly
   why. OK, deferred.

   solaris2xg+krb5+krb4+openssl+shadow:

   Corrected an omission in applying PeterE's updates to the HP-UX
   targets. makefile, 28 Mar 2006.

   NebBSD 2.0 build completed by turning off optimization on ckcfn2.c
   ("KFLAGS=-O0"). Result supports 64-bit ints and, presumably, large
   files. uname -p = "m68k", -m = "sun3". 29 Mar 2006.

Dev.17

   Added large file/integer support to SHOW FEATURES. ckuus5.c, 27 Mar
   2006.

   Built OK on Solaris 9 and 10 with gcc (someone was complaining that
   this didn't work, but that was 8.0.211).

   Started build on a Sun 3/80 mc68030 with NetBSD 2.0 and gcc 3.3.3. But
   it died with an assembler error in ckcfn2.c (compiler bug). 27 Mar
   2006.

   New targets of HP-UX 10/11 with OpenSSL from PeterE. makefile, 27 Mar
   2006.

   In response to a complaint from Clarence Dold, tried "make redhat9"
   (which is the rather dated target that tried to include all forms of
   security) on RH Linux AS4.3, it failed miserably. I made a new makefile
   target, removing Kerberos IV and got a lot farther. But then in
   ckcftp.c, the following struct definition:

struct {
    CONST gss_OID_desc * CONST * mech_type;
    char *service_name;
} gss_trials[] = {
    { &ck_gss_mech_krb5, "ftp" },
    { &ck_gss_mech_krb5, "host" },
};

   refers to a variable, ck_gss_mech_krb5, that is not defined anywhere.
   Up above, however, is a static definition for gss_mech_krb5, so I
   changed the struct definition to match. Next, in ckuath.c, the compiler
   could not find the com_err.h file. Turns out in Linux this is in a
   subdirectory, et, so we have to add a -I clause to the makefile target
   for this. Made a target for Linux+SSL only. Made a target for
   Linux+Krb5 only; this required moving an #ifdef in ckuus7.c to prevent
   an unguarded reference to SSLEAY_VERSION. New targets: linux+krb5+ssl,
   linux+krb5, linux+krb5. ckcftp.c, ckuus7.c, makefile, 27 Mar 2006.

   Patches from Mark Sapiro to suppress getsockopt() and getsockname()
   warnings in Mac OS X. ckcnet.[ch], 18 Mar 2006.

Dev.16

   Got access to AIX 5.3, built there, all OK, including large files. 13
   Mar 2006.

   Gavin Graham noticed that FTP [M]GET /DELETE /MOVE-TO: was rejected
   with "?Sorry, /DELETE conflicts with /MOVE or /RENAME". This check
   belongs in the PUT code but not in the GET code. Commented it out and
   tested the result. The combination is now accepted but then Kermit
   refuses the incoming file as if it had been given a /SMALLER-THAN: or
   /LARGER-THAN: switch, which it didn't happen. Turns out there was one
   more place where I wasn't initializing the new "wide int" member of the
   switch-parsing pv[] struct. Once this was fixed, the /MOVE-TO part
   still didn't work. Turned out the /DELETE case was part of a long
   if-else-if-else- chain, which effectively made /DELETE and /MOVE-TO: or
   /RENAME-TO: mutually exclusive. Fixed this, now it works fine.
   ckcftp.c, 13 Mar 2006.

   Added OpenSSL version number display to SHOW FEATURES. ckuus5.c, 9 Mar
   2006.

   In response to a complaint that C-Kermit would not build on HP-UX 11
   with OpenSSL, I tried it myself on both 11.11/PA-RISC and 11i
   v2/Itanium. It built OK on both but I had to add a new target
   (hpux1000o+openssl-nozlib) for no Zlib since these boxes did not have
   it installed. makefile, 9 Mar 2006.

Dev.14

   The reason Kermit was looping on directories in IRIX was a classic
   "double-ended break". The makefile targets failed to define DIRENT so
   Kermit was open/read on directories rather than opendir()/readdir().
   But then it was also failing to account for the fact that read() would
   return -1 on error. The makefile fix adds -DDIRENT, and the read() case
   in traverse() now properly terminates its loop on error. ckufio.c, 6
   Mar 2006.

   Fixes from J. Scott Kasten to the IRIX 6.4 and 6.5 makefile targets.
   They were badly wrong. makefile, 6 Mar 2006.

   Added a 32-bit aix51+openssl target. Builds OK, works fine (tested
   against our SSL POP server). Tried I tried adding -D_LARGE_FILES. It
   seems to work fine, so we'll keep it. Cleaned up the other aix5blah
   entries a bit also. makefile, 6 Mar 2006.

   Built on AIX 5.1 ("make aix51") without incident. Then I tried:

 make aix51 "KFLAGS=-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"

   This had no effect. I found the relevant document ath the IBM website.
   It says to use -D_LARGE_FILES instead. I added this to the AIX 4.2
   target since (a) IBM says large files are supported by AIX 4.2 and
   later, and (b) all Kermit AIX targets past 4.2 use the 4.2 one. Plus a
   clause to make sure CK_OFF_T is defined appropriately. ckcdeb.h,
   makefile, 6 Mar 2006.

   Fixed the HELP command when used with tokens like @, ^, #, and ;. The
   first two had been omitted from the table. The second two required a
   new path into the guts of the parser, since comments are normally
   stripped at a very low level. ckuus[r2].c, ckucmd.c, 24 Feb 2006.

Dev.14

   Changed the new NetBSD target names to be consistent with the
   conventions used in most other targets:

  netbsdwoc -> netbsdnc
  netbsdse  -> netbsd+ssl+srp+zlib
  irix65se  -> irix65+ssl+srp+zlib

   and removed old, now superfluous, NetBSD targets (old-netbsd, netbst15,
   netbst16), leaving synonym labels in their place. Also updated
   (crudely) the Linux target variations (curses instead of nocurses, no
   curses at all) to be (appropriately modified) copies of the current
   linux target. It would be nicer to combine them, but this gets the job
   done. makefile, 23 Feb 2006.

   From J.Scott Kasten: (quote...) I just uploaded a patch to
   /kermit/incoming. The file name is "jsk-patch-for-cku211.diff". I have
   also included the patch as ASCII text in this email below. This patch
   may be applied to the cku211.tar.gz source code via:
cd cku211, patch -p1 <../jsk-patch-for-cku211.diff

   The patch adds 4 new build targets:
  netbsdwoc - a stripped no curses target for iksd used.
  netbsdse  - security enhanced target with srp, ssl, and zlib.
  irix65gcc - build on SGI Irix 6.5 platform using gcc.
  irix65se  - security enhanced target with srp, ssl, and zlib.

   The patch fixes one build target:
  irix64gcc - The "-s" option is not supported by gcc under Irix.

   I thank all of you in the Kermit Project for such a fine utility. I
   recently had to get a 16 MB file overseas across a spotty
   communications link to repair a computer remotely. Kermit was the only
   thing that could do the job, so I wanted to contribute these patches
   back to the mainstream to say thanks. This digitally signed email is a
   binding contract that officially assigns the rights to the source code
   patch (shown below) that I developed to the Kermit Project at Columbia
   University. (...end quote) ck_ssl.c, makefile, 23 Feb 2006.

   Further attempts at SSL/TLS message suppression when QUIET is ON.
   ck_ssl.c, 16 Feb 2006.

Dev.13

   Satisfied myself that LFS is OK on Solaris 10 i386, and I'm going to
   assume it's also OK on Solaris 9. Made LFS standard for all Solaris 9
   and 10 builds (including the secure ones) except the explicitly 64-bit
   ones, and made the provisional solarisXXlfs targets into synonyms.
   makefile, 9 Feb 2006.

   Removed a spurious extra linux+openssl label from the makefile, added
   solaris10g_64 synonym. 9 Feb 2006.

   Fixed a signed/unsigned char warning in the new boundspair() calling
   code in the compact substring notation handler. ckuus4.c, 9 Feb 2006.

Dev.12

   Built OK on FreeBSD 6.1 on AMD64. Adjusted some copyrights and date
   stamps. ckcmai.c, makefile, 8 Feb 2006.

   Apparently, ever since C-Kermit 7.0 was released, it has never been
   possible to use a variable for the as-name in a RECEIVE command in
   Kermit 95. This is because evaluation of the as-name field was deferred
   until after we could check whether it might be a directory name (which,
   in Windows, could start with a backslash). This little bit of magic was
   not a good idea, magic hardly ever is. I changed the code to evaluate
   both as-name fields in the normal way. If they want to receive to a
   directory called "\%1", they'll just have to spell it differently. The
   workaround is to turn the whole command into a macro and evaluate it
   before executing it, e.g.:

  assign xx receive /as-name:\%1
  do xx

   ckuus6.c, 1 Feb 2006.

   Created a new build target for SCO OSR6.0.0. Gets the exact 6.x.x
   version dynamically. Supports large files and big-number arithmetic via
   CK_OFF_T. The sockopt() family of functions changed the data types of
   some of their arguments since OSR5. It was already possible to define
   SOCKOPT_T and GSOCKNAME_T from the command line but I had to add code
   to also allow this for GPEERNAME_T too. ckcnet.c, makefile, 30 Jan
   2006.

   Determined that SCO OSR5.0.6 (and earlier) do(es) not support large
   files. Don't know about 5.0.7. 30 Jan 2006.

   Changes from PeterE to the makefile for HP-UX 6 and 7, to accommodate
   bigger symbol tables, etc. 19 Jan 2006.

   Changed arraybounds() to call boundspair(). This was a rather drastic
   change, not strictly necessary, but I think I got all the kinks out.
   ckuus5.c, 13 Jan 2006.

   Noticed that when I changed the compact substring notation code back on
   August 9th, I broke the ability to use arithmetic expressions within
   the brackets, which explains some rather odd behavior I saw with some
   of my scripts. Looking more deeply into this, I also see that all the
   parsers I have been using up to now for this, as well as for array
   bounds pairs, have been inadequate because they never allowed for
   nested constructions, such as a member of a bounds pair that itself was
   an array element, possibly with another array element as a subscript. I
   wrote a new routine for this, called boundspair(), which is like
   arraybounds() except it accepts an extra argument, an array of
   characters that can serve as bounds-pair delimiters, and it returns the
   pair separator that was encountered in another new argument. For the
   alternative substring notation for [startpos-endpos] I had to change
   the delimiter from '-' to '_' because '-' can be used in arithmetic but
   '_' is not a recognized operator. This is so I can parse, e.g. [a:b] or
   [a_b] in the same context, and then find out which form was used, e.g.
   \s(line[9:12]) or \s(line[9_12]); the first string is 4 bytes long, the
   second is 12. Everything seems to be OK now. \s(line[10]) gives
   everything starting at 10, but \s(line[10:0]) gives the null string.
   Bad syntax in the bounds pairs results in a null string; missing pieces
   of the bounds pair result in defaults that should be compatible with
   previous behavior. ckuus[45].c, ckuusr.h, 13 Jan 2006.

   A fix for setting 921600 bps on Linux from Paul Fulghum, Microgate
   Systems Ltd. ttgspd(): ckutio.c, 11 Jan 2006.

   A section of tstats() where GFTIMER isn't defined (e.g. on Motorola
   sv68r3v6) was garbled. Fixed in ckcfn2.c, 10 Jan 2006.

   Evidently the HP-UX bundled (non-ANSI non-optimizing) compiler doesn't
   like long integers in switch expressions. Changed three examples of
   these in the S-expression code. ckuus3.c, 10 Jan 2006.

Dev.11

   Made a pure 32-bit build on SCO UnixWare 7.1.4, all OK. Found that this
   version also supports LFS, added it to the uw7 target. makefile, 9 Jan
   2006.

   Looks like I no longer have access to SCO OSR5.

   Built on IRIX 6.5. I didn't bother with large files there because it
   does not support the _LARGEFILE_SOURCE interface; you have to change
   all the APIs at the source level from blah() to blah64(). Seems to work
   fine as a 32-bit app even though its off_t is 64 bits. Tried a pure
   64-bit IRIX 6.5 build but it dies in ckcnet.c when it hits SOCKOPT_T
   and GSOCKNAME_T with "The identifier 'socklen_t' is undefined".

   Built on QNX-32 4.25, which has no large file support. Got a few
   strange compiler (WatCom) warnings, but it built and runs OK. Noticed
   that file transfers into QNX over a Telnet connection can't use
   streaming, but that's nothing new to this version; same thing happens
   with C-Kermit 7.0. 9 Jan 2006.

   Built on NetBSD 1.4.1 (1999), found that it did not like the large file
   assumption -- fseeko() and ftello() do not exist; added a clause to the
   netbsd target to check for fseeko and not define _LARGEFILE_SOURCE if
   not found. Oddly enough, off_t is 64 bits anyway, but it doesn't look
   like the APIs are half-done. For example, stat() uses off_t (64 bits)
   for the file length, but fseek() uses long (32 bits) and there is no
   64-bit analog. Anyway the new netbsd target works on both 1.4.1 and
   1.5.2 (no large files) and on 2.0.3 (large files). makefile, 9 Jan
   2006.

   Finally got around to testing Jeff's changes to SSL/TLS RAW mode from
   December 30th against our POP server. It didn't work, couldn't log in.
   Tried backing off the ckctel.c changes first; that allowed login and
   communication, but it did not suppress activation of Telnet protocol
   whenever a 0xff byte arrived. Backed off the rest of the changes and
   now all is OK again. ckctel.c, ckcnet.c, ckuus7.c, 9 Jan 2006.

   Built on FreeBSD 6.0 on IA64. All OK except I got a warning about the
   argument passed to time() in logwtmp() in ckufio.c. This section had
   already been partially fixed; thus I put the improved version into
   #ifdef CK_64BIT, which is our newly available symbol that should be
   automatically defined for any true 64-bit build. ckufio.c, 4 Jan 2006.

   Built on HP-UX 11.11 with _LARGEFILE_SOURCE and _FILE_OFFSET_BITS=64.
   The result works fine as far as I can tell. It sees big files, it can
   open them, seek to positions past the 2^31 boundary. It can send large
   files. It can do large-number arithmetic (^ 2 62). The only problem is
   that during compilation, every single modules warns:

cc: "/usr/include/sys/socket.h", line 504: warning 562: Redeclaration of
"sendfile" with a different storage class specifier: "sendfile" will have
internal linkage.
cc: "/usr/include/sys/socket.h", line 505: warning 562: Redeclaration of
"sendpath" with a different storage class specifier: "sendpath" will have
internal linkage.

   These warnings should be perfectly harmless since they are not coming
   from C-Kermit code, nor does C-Kermit use either one of those
   functions. These warnings don't come out in HP-UX 11i v2, but on that
   one we get tons and tons of picky compiler warnings (variables set but
   not used, defined but not referenced, etc). A couple, however, turned
   out to be valid; one case of "expression has no effect", and two of
   "string format incompatible with data type" (I missed a couple
   file-size printfs).

   There were also numerous warnings about signedness mismatch or sign
   conversion of constants like IAC (0xff). Does the HP-UX Optimizing
   Compiler have a compiler flag to make all chars unsigned? Yes, +uc, but
   the man page says "Be careful when using this option. Your application
   may have problems interfacing with HP-UX system libraries and other
   libraries that do not use this option". Sigh, better not use it.

   After reviewing "HP-UX Large Files White Paper Version 1.4" and HP's
   "Writing Portable Code" documents, I added -D_LARGEFILE_SOURCE
   -D_FILE_OFFSET_BITS=64 to the hpux1000 target, which is the basis for
   all HP-UX 10.00 and later builds. Large files are available in HP-UX
   10.20 and later. 10.00 and 10.10 were not real releases, and anyway
   these flags should be harmless there unless the large-file
   implementation was only partly done. Built OK on both PA-RISC and IA64,
   optimized and plain. makefile, 4 Jan 2006.

   Dumping the command stack every time there's an error is really too
   much. I added SET COMMAND ERROR-DISPLAY {0,1,2,3} to set the verbosity
   level of error messages. Only level 3 dumps the stack. ckuus[235].c, 2
   Jan 2006.

   OpenBSD, same as FreeBSD. Also, added OS-version-getting thing to
   makefile target for the program herald, as in the other BSDs. Built on
   OpenBSD 2.5 from 1998, it has 64-bit off_t too. ckcdeb.h, makefile, 2
   Jan 2006.

   Observed that FreeBSD 4.x has a 64-bit off_t, but does not use the
   _LARGEFILE_SOURCE convention. Reasoning that all versions of FreeBSD
   have off_t (I was able to check back to FreeBSD 3.3), I simply #define
   CK_OFF_T to be off_t in ckcdeb.h within #ifdef __FreeBSD__ .. #endif.
   Another one down. This can be done for any platform that is guaranteed
   to have off_t. Turns out FreeBSD 3.3 has 64-bit off_t too. 2 Jan 2006.

   Fixed typo, #ifdef CK_NOLONGLONG in ckuus5.c should have been #ifndef
   CK_LONGLONG (which, it turns out, we don't use anyway). 2 Jan 2006.

   Noticed that NetBSD 2.0.3 has 64-bit off_t, and that _LARGEFILE_SOURCE
   is mentioned in <stdio.h>. Tried building Kermit with _LARGEFILE_SOURCE
   added to CFLAGS, it's good. Added it to the netbsd target. makefile, 1
   Jan 2006.

   Updated visible copyright dates to 2006: ckcmai.c, ckuus2.c, ckuus5.c,
   1 Jan 2006.

   Tried FSEEK /FIND: on a largish file (over 100,000 lines), using it to
   seek to a line near the end. It took 0.756 seconds, compared with Unix
   grep, which did the same thing in 0.151 sec. That's because C-Kermit is
   using ckmatch(). But if the search target is not a pattern, it should
   be a bit faster to use ckindex(). Yup, 0.554 sec, a 36% improvement.
   Can't expect to compete with grep, though; it's highly tuned for its
   single purpose. ckclib.[ch], ckuus7.c, 1 Jan 2006.

   Back to the pattern matcher. Noticed that "IF MATCH index.html
   [a-hj-z]*" succeeded when it should have failed. In ckmatch(), the
   clist section needed one more clause: it can't float the pattern if an
   asterisk does not occur in the pattern before the clist. This change
   fixes the problem without breaking any other cases that weren't already
   broken, most of which involve slists, i.e. {string,string,string,...}.
   ckclib.c, 30 Dec 2005.

   INPUT /NOWRAP, added recently, is used for efficiently copying the
   INPUT stream intact, but it's not good for matching because if the
   INPUT target is broken between the end of the previous buffer and the
   beginning of the next one, the context is lost and the match does not
   occur. I thought of several ways around this, but they all involve
   saving a huge amount of context -- old input buffers, the arrays of
   target strings and corresponding match positions, etc. The alternative
   is fairly simple but it's not transparent to the user. Here's what I
   did in a POP script:

.eom := "\13\10.\13\10"
set flag off                           # FLAG ON = success
while ( open connection && not flag ) {
    .oldinput := \fright(\v(input),8)  # Save tail of previous INPUT buffer
    input /clear /nowrap 4 \m(eom)     # Get new INPUT buffer
    if success {                       # INPUT matched - good
        .s := {\freplace(\v(input),\m(eom),\13\10)}
        set flag on
    } else {                           # No match
        .s := \v(input)                # Check if target crossed the border
        .oldinput := \m(oldinput)\fsubstr(\v(input),1,8)
        if \findex(\m(eom),\m(oldinput)) set flag on
    }
    ...
}

   I think this will be easier to explain than any dangerous and grotesque
   magic I might put into doinput() itself. For now, added a few words
   about this to HELP INPUT. ckuus2.c, 30 Dec 2005.

   It was annoying me that FILE STATUS (FSTATUS) required a channel number
   to be given even if only one file was open, so I supplied the correct
   default in that case. ckuus7.c, 30 Dec 2005.

   Added FSEEK /FIND:pattern. This form of FSEEK accepts all the other
   switches and arguments and performs the desired seek. Then, if the seek
   was successful, it starts from that point and reads through the file,
   line by line, searching for the first line that contains the given
   string or matches the given (unanchored) pattern and, if found, sets
   the file pointer to the beginning of that line. Useful, e.g., for very
   long timestamped logs, where you want to start processing at a certain
   date or time; searching for a particular string is much faster than
   doing date comparisons on each line. ckuus[27].c, 30 Dec 2005.

   It was reported that WRITE SESSION always returned a failure status,
   even when it succeeded. The problem was that Unix versions of zsout()
   and zsoutl(), for the session log only, were using write() and
   returning write()'s return code, which is different from what zsout()
   and zsoutl() are documented to return. Also plugged a couple potential
   holes in zsoutx() that I noticed while I was in the neighborhood.
   ckufio.c, 30 Dec 2005.

   Code adjustments from Jeff, mainly to the SSL and TLS Raw mode code
   from several weeks ago, plus changing some data types in the security
   code to CK_OFF_T, plus a different data type for CK_OFF_T for K95
   because Windows size_T isn't signed. This presumably will allow
   large-number arithmetic but it will not give large file access because
   that will require replacing all C library file i/o calls (esp. in
   ckofio.c) with native Windows APIs. Build on Solaris 9 with and without
   SSL and on Linux RH AS4.2 with and without SSL. ck_crp.c, ck_ssl.c,
   ck_ssl.h, ckcdeb.h, ckcftp.c, ckcmai.c, ckcnet.c, ckcnet.h, ckctel.c,
   ckuat2.h, ckuus4.c, ckuus7.c, ckuusr.c, 30 Dec 2005.

Dev.10

   Built and tested on Red Hat AS4 AMD X86_64, used it to upload new
   sources to FreeBSD 4.11. Built on FreeBSD 4.11/i386. Here's another one
   where off_t is 64 bits, even though long is 32 bits. But it seems to
   work ok, not sure why, when CK_OFF_T is 32 bits. There is no
   _LARGEFILE_SOURCE stuff in the header files. 29 Dec 2005.

   Built on Mac OS X 10.3.9 using the new macosx10.4 target to pick up
   LFS. Works fine.

   Built on Red Hat Linux 4WS on IA64 (64-bit). Now this one is odd,
   stat() fails on big files. It happens also if I use the "linuxnolfs"
   target, which does not define _USE_LARGEFILE or _FILE_OFFSET_BITS=64.
   DIRECTORY BIGFILE shows the size as -1, but if "log debug", it says "no
   files match", i.e. different behavior, observer effect. I hate when
   that happens.

   Let's see if that's an anomaly... Built on Tru64 Unix 4.0F (64-bit
   Alpha). It sees long files just fine. Rebuilt and checked on x86_64
   again... fine. OK, let's not worry about IA64 yet.

   Another small fix to the HP-UX 9.0 target from PeterE. makefile, 29 Dec
   2005.

   Updated ckvfio.c to use CK_OFF_T for the relevant variables. Built and
   tested on VMS/Alpha 7.2: file transfer in remote mode; making a Telnet
   connection and then local-mode file transfer; S-Expressions, all OK.
   Also built a no-net version OK. 29 Dec 2005.

   Commented out the SHOW FEATURES section that displays constants like
   INT_MAX, CHAR_MAX, etc, because printing each value in the appropriate
   format is too tricky, and we don't need them anyway. ckuus5.c, 29 Dec
   2005.

   Built on Unixware 7.1.1, a pure 32-bit build, seems fine. Rebuilt on
   Red Hat AS 4.2 just to make sure I didn't break anything, it's OK. No
   testing on HP-UX, etc, because HP testdrive file system is full, can't
   upload anything. 29 Dec 2005.

   Fixed a problem with uninitialized pv[].wval (switch-parsing
   parameter-value) members that showed up on certain platforms or with
   certain compilers. Now the Mac OS X 10.4 version works. ckuus[r367].c,
   ckcftp.c, 28 Dec 2005.

   Added GREP /EXCEPT:pattern. ckuus[26].c, 27 Dec 2005.

   Built on Mac OS X 10.4 with the regular target. It seems that in that
   case, off_t is 64 bits anyway. Noticed that a lot of stuff didn't work,
   like exponentiation in S-Expressions. Tried building it as above, which
   worked, and now CK_OFF_T is 64 bits instead of 32, but (^ 2 30) is
   still 2.0. In fact 2-to-the-any-power is 2.0. It seems that the Mac OS
   X version did not have FNFLOAT defined. It also seems that every test
   in dosexp() like:

if (result != fpresult) fpflag++;

   should have been protected by #ifdef FNFLOAT..#endif /* FNFLOAT */ -- a
   double-ended break, as they say in the nuclear power industry.
   ckuus3.c, 27 Dec 2005.

   Tried building a hybrid version on Solaris 9 after all since the LFS
   API is ostensibly the same as for Linux:

 make solaris9 "KFLAGS=-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"

   It built smoothly and the resulting binary is 2.5MB compared to 3.4MB
   for the 100% 64-bit version. Looks like a keeper. For now, added
   solaris9lfs and solaris10lfs entries to the makefile but if these work
   on PCs we can make these the regular entries for Solaris 9 and 10. 27
   Dec 2005.

   Took all the LONGLONG stuff out of ckcdeb.h, we don't need it.

   All of these changes result in 64-bit arithmetic (more or less) on
   32-bit Linux, as well as on true 64-bit platforms.

   Rebuilt today's code on Solaris 9 in the 32-bit and 64-bit worlds, on
   Red Hat 6.1, Red Hat AS4.2. I haven't bothered trying a 32/64 hybrid
   build for Solaris, since I can build a pure 64-bit version there. Quick
   tests show the large-number arithmetic works OK in all cases except, of
   course, on pure 32-bit builds (unfortunately I can't find a running
   Linux system old enough to verify this for Linux, but it's true for
   other 32-bit platforms). 24 Dec 2005.

   Converted the S-Expression handler to use wide integers. ckuus3.c, 24
   Dec 2005.

   Fixed ckfstoa() to handle the case when n is negative and (0 - n) is
   also negative, which happens for numbers 2^(n-1) or greater, where n is
   the number of bits in the word size we're dealing with, e.g. 64, in
   which case 2^63 has its sign bit set so seems to be negative. In such
   cases, ckfstoa() returns "OVERFLOW" instead of a numeric string. We'll
   have to see how this plays out but I think it's better to cause a parse
   error and stop things dead than to return a spurious number. ckclib.c,
   24 Dec 2005.

   Changed the algebraic expression evaluator to use wide values.
   ckuus5.c, 24 Dec 2005.

   SEND /SMALLER-THAN:n, SEND /LARGER-THAN:n, and and SEND /START:n also
   now allow large values of n. ckuusr.c, 24 Dec 2005.

   Changed SEND /CALIBRATE:n to allow big values of n. This makes it
   possible to test the protocol aspects of long-file transfer without
   actually having a long file handy. ckuusr.c, 24 Dec 2005.

   Next come switches, which store their results in a struct stringint.
   This struct was defined in each module where it was used
   (ckuus[r367].c, ckcftp.c). I moved the definition to ckuusr.h and added
   a wval member, which can be referenced by any switch-parsing code that
   calls cmnumw(). 24 Dec 2005.

   Changed FSEEK and FCOUNT to use the new chained FDB interface, now we
   can seek and look past 2GB. ckuus7.c, 24 Dec 2005.

   Calling cmnumw() in chained FDBs required defining a new function code,
   _CMNUW, adding a new member to the OFDB struct for returning wide
   results, and adding a new case to cmfdb(). ckucmd.[ch], 24 Dec 2005.

   Calling cmnumw() directly requires changes to each routine that uses
   it. The INCREMENT and DECREMENT commands, for example, required changes
   to doincr(), varval(), and incvar(), and all references to them.
   ckuusr.[ch], ckuus[56].c, 24 Dec 2005.

   Made a CK_OFF_T version of cmnum(). It would be a very big deal to just
   change cmnum() to return a new type, so another idea is to rename
   cmnum() to something else, cmnumw(), change its result argument to
   CK_OFF_T, and then make a stub cmnum() to call it to get an int, then
   call cmnumw() explicitly any time we need a big number. ckucmd.c, 24
   Dec 2005.

   Converted all fseek() and ftell() to macros that expand to fseek() and
   ftell() or fseeko() and ftello() depending on whether _LARGEFILE_SOURCE
   is defined. ckufio.c, ckuus7.c, ckuusx.c, 24 Dec 2005.

   Built it on Red Hat Linux 6.1 from 1999. This picked up the long file
   support too. Guess 6.1 isn't old enough to not have it! Kermit seems to
   work OK on regular files but I don't have enough disk space to create a
   long file, and my bigfile.c program (which creates a long file
   containing only 1 byte) doesn't work ("fseeko: invalid argument"). It
   looks like parts of this API were visible in Linux before they were
   actually working. 24 Dec 2005.

   Checked this on true 64-bit Linux. The same symbols are defined in
   CFLAGS, but they do no harm; it builds without complaint and works
   fine. 24 Dec 2005.

   It looks like the operative feature-test macro in glibc for
   transitional large file support is __USE_LARGEFILE64. So if this is
   defined, we can also supply _LARGEFILE_SOURCE and _FILE_OFFSET_BITS=64
   automatically for 32-bit Linux builds. But there's a Catch-22, you
   don't know if this is defined until you read the header files, but you
   have to define _LARGEFILE_SOURCE and _FILE_OFFSET_BITS before you read
   the header files. Maybe it's good enough to grep through <features.h>
   for __USE_LARGEFILE64. makefile, 23 Dec 2005.

   Converted the rest of the source files to use CK_OFF_T for all file
   size and offset and byte-count related variables, and converted all
   references to these variables in printfs to go through ckfstoa(). Then
   I built it on Linux/i386 with:

  make linux "KFLAGS=-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"

   which makes off_t be 64 bits and magically makes all the regular file
   APIs use 64-bit sizes and offsets without changing the API calls in the
   source code. It's going to be a lot of work to get through all the
   kinks but I was able to send a long file, do directory listings of long
   files, do \fsize(longfile), etc. When it sends a file, the length is
   shown correctly in the A packet. If the receiver does not support big
   numbers, it receives the file OK anyway, without showing the size, the
   thermometer, or percent done (and then will get an error when the file
   keeps coming after the 2G mark). Kermit 95 actually refuses long files
   for "Size", but only if the announced is less than 2^63 bytes. When
   today's Linux version receives a file, it shows the length correctly in
   the file-transfer display, as well as percent done, thermometer, etc.
   Also built this version on true 64-bit Linux, and it worked fine. Many
   files changed, 22 Dec 2005.

   For the record, this API is specified in X/Open's Single UNIX
   Specification Version 2, which is branded as UNIX 98. It is called
   Large File Support, or LFS, and was developed at the Large File Summit.

   Converted debug(), tlog(), ckscreen(), etc, to handle potentially "long
   long" arguments by making their "n" argument CK_OFF_T. ckuusx.c,
   ckcdeb.h, 22 Dec 2005.

   Changed Attribute Packet reader to convert incoming file size attribute
   with ckatofs() rather than atol(). ckcfn3.c, 22 Dec 2005.

   Changed ckfstoa() to return a signed number in string form, rather than
   an unsigned one. That's because off_t is signed (thank goodness). Added
   the inverse function, ckatofs() so we can convert file sizes and
   offsets back and forth between binary number and string. ckclib.c, 22
   Dec 2005.

   Fleshed out 32/64-bit data type definitions and changed struct zattr
   (file attribute structure) members length and lengthk to have the new
   CK_OFF_T type. Changed final arguments of debug() and tlog() to be the
   new LONGLONG type. ckcdeb.h, 22 Dec 2005.

   Noticed that HTTP not included in FreeBSD and OpenBSD builds. Fixed in
   ckcdeb.h, 22 Dec 2005.

   HTTP file-descriptor swapping is not thread safe. Doing it right, of
   course, is a big deal, so for now I just don't define HTTP_BUFFERING
   for Windows. ckcnet.c, 15 Dec 2005.

Dev.09

   The problem with HTTP downloads is that Kermit always does
   single-character read() or socket_read() calls (or the SSL equivalent);
   see http_inc(). I added buffering code for non-SSL connections only but
   it's gross because it has to swap ttyfd and httpfd before calling
   nettchk(). I tried making a nettchk() clone that accepts a file
   descriptor as an argument but it didn't work because too many other
   routines that are invoked directly or implicitly by nettchk() (such as
   in_chk()) are still hardwired to use ttyfd. HTTP GETs are now 20 times
   faster on the local network (the improvement is less dramatic over a
   clogged Internet). ckcnet.[ch], 15 Dec 2005.

   PeterE complained about ugly DIRECTORY error message, ?No files match -
   "{blah}". The braces are used internally in case the user typed more
   than one filespec. I changed the error message to remove them. Ditto
   DELETE. ckuus6.c, 15 Dec 2005.

   Added debug() statements to http_blah() routines to tell whether the
   connection is "chunked". There seems to be a bad performance problem.
   ckcnet.c, 14 Dec 2005.

   An updated HP-UX 9.xx makefile target from PeterE to fix a core dump
   that happens on that platform due to insufficient resources. 14 Dec
   2005.

   Started converting code to use CK_OFF_T for file sizes and offsets, and
   all [s]printf's to replace "%ld" or whatever with "%s", and the size
   variable with a call to ckfstoa(). Since I haven't actually changed the
   definition of CK_OFF_T from what all the size variables were to begin
   with (i.e. long), it shouldn't do any harm. So far just ckcfn3.c 10 Dec
   2005.

   Our Ctrl-C trap (the ON_CTRLC macro) wasn't working for kerbang files.
   Rearranged some code to make it work. ckcmai.c, 8 Dec 2005.

   Fixed a typo in the non-ANSIC definition of ckfstoa(). ckclib.c, 7 Dec
   2005.

Dev.08

   Added another debug() statement in FTP secure_getbyte() to see what's
   going on with Muhamad Taufiq Tajuddin's 205-byte-per-second FTP/SSL
   downloads, plus new code to test SSL_read()'s return code (byte count);
   if 0 don't update the screen. ckcftp.c, 4 Dec 2005.

   The INPUT command did not account for tn_doop() returning 3. Fixed in
   doinput(), ckuus4.c, 4 Dec 2005.

   Discovered that on a SET PORT /SSL connection, Kermit treats incoming
   0xff data bytes (e.g. sent from the POP server) as IACs and goes into
   Telnet negotiations. Jeff says "You will need to implement NP_SSLRAW
   and NP_TLSRAW that do the same as NP_TCPRAW but negotiate SSL or TLS as
   appropriate." This was not as easy as it sounded, because apparently a
   lot of the Telnet code is used by SSL and TLS even when Telnet protocol
   is not being executed. I wound up doing this as follows: I added
   /SSL-RAW and /TLS-RAW to the switch table. Rather than disable Telnet,
   they do exactly what the /SSL and /TLS switches do, but also set a
   special flag. This flag is checked in only two place: netclos() (to
   prevent Kermit from sending TELNET LOGOUT when closing the connection),
   and tn_doop() (to prevent Kermit from reacting to incoming IACs; it
   makes tn_doop() return(3), which means "quoted IAC", which causes the
   caller to keep the IAC as data). ckcnet.h, ckctel.h, ckctel.c,
   ckuus7.c, 4 Dec 2005.

   Updated INPUT and MINPUT help text. ckuus2.c, 3 Dec 2005.

   Changed "make netbsd" to be a synonym for "make netbsd2" because the
   original netbsd target was ancient. Renamed it to netbsd-old. makefile,
   3 Dec 2005.

Dev.07

   Built OK on VMS 7.2-1 with MultiNet 4.4. Built with and without OpenSSL
   on Linux OK, ditto Solaris 9. Built OK on RH Linux AS4 on X86_64
   (64-bit); "show var fsize" (using new ckfstoa()) works OK there. Also
   Mac OS X 10.3.9 (32-bit), Tru64 UNIX 4.0F (64-bit), HP-UX 11iv2
   (64-bit) (picky new compiler spews out tons of useless warnings),
   FreeBSD 6.0 on ia64 (64-bit).

   Changed \flop() and flopx() functions to take a third argument, a
   number signifying at which occurrence of the break character to lop,
   so:

\flopx(sesame.cc.columbia.edu) = edu
\flopx(sesame.cc.columbia.edu,,2) = columbia.edu

   ckuus[24].c, 1 Dec 2005.

   IF KERBANG didn't always work right. If a kerbang script TAKEs another
   kerbang script, the second one should have IF KERBANG false, but it
   didn't. Added a check for \v(cmdlevel) == 1. Now you can write a
   wrapper that runs a kerbang script in a loop, and the latter can use IF
   KERBANG to know whether to EXIT (if called at top level) or END (if
   called by another script, thus allowing -- in this case -- the loop to
   continue). ckuus6.c, 29 Nov 2005.

   Getting rid of the awful hacks required to call cmiofi() meant I also
   had to change the EDIT command, which is the only other place where
   it's used. Unfortunately now it's no longer possible to give EDIT
   without a filename (to just start an empty editor) but I doubt anyone
   will notice. ckuusr.c, 29 Nov 2005.

   Discovered that FOPEN /APPEND doesn't work if the file doesn't exist.
   It uses cmiofi() which is a super-hokey front end to cmifi2(). I had
   code to call it but for some reason it was commented out, with a note
   to the effect it didn't work. I uncommented it but that didn't help
   much. So I wrote an entirely new cmiofi() that works exactly as it
   should, using chained FDBs, _CMIFI to _CMOFI (I think the original
   cmiofi() predated chained FDBs). ckuus7.c, ckucmd.c, 29 Nov 2005.

   Changed ssl_display_xxx() to just return if SET QUIET ON. Otherwise
   there is no way to suppress the messages. Also protected a previously
   unprotected printf("[SSL - OK]\r\n"); by if ( ssl_verbose_flag ).
   ck_ssl.c, 28 Nov 2005.

   Previously the only way to INPUT an entire data stream without losing
   anything (assuming it was ordinary lines of text that were not "too
   long"), was line-by-line:

while open connection {
    input /clear 10 \13\10
    if fail break
    if eq "\v(input)" "$ \13\10" break
    fwrite /string \%o {\freplace(\v(input),\13\10,\10)}
}

   The new code is 3 times faster using the default INPUT buffer length of
   4K. Raising it to 16K makes it 3.6 times faster (not worth it).
   Changing the POP3 script to use INPUT /NOWRAP makes it about twice as
   fast (it does more; it has to do all the byte-stuffing and unstuffing).
   27 Nov 2005.

   One thing that INPUT was never able to do well was read and save the
   complete incoming data stream. That's because, while waiting for its
   target, the buffer might overflow wrap around. Yet there was never a
   way to tell it to stop when its buffer fills up and let me save it. I
   added a /NOWRAP switch that does this. If the buffer fills up before
   any other completion criterion is met, INPUT returns failure, but with
   \v(instatus) set to 6 (the next available instatus value). Thus a
   program that wants to read and save (say) an email message from a POP
   server, which could be any length at all, and which terminates with
   <CRLF>.<CRLF> could do this:

set flag off
while open connection {
    input /nowrap 10 \13\10.\13\10 # Wait for <CRLF>.<CRLF>
    if success {
        frwrite /string \%o {\freplace(\v(input),\13\10.\13\10,\13\10)}
        set flag on
        break
    } else if ( == \v(instatus) 6 || == \v(instatus) 1 ) {
        frwrite /string \%o {\v(input)}
        continue
    }
    break
}
if flag (handle success)

   Note carefully the braces around the FWRITE text; without them,
   trailing spaces would be lost.

   Added INPUT /CLEAR so INPUT can be started with a clean buffer without
   requiring a separate CLEAR INPUT command. ckuusr.h, ckuus[r24].c, 27
   Nov 2005.

   Using the new functions, I wrote a script to fetch mail from a POP3
   server over a TLS connection. But the line-at-a-time input (needed for
   changing line terminators and byte-stuffing text lines that start with
   "From ") is slow, 17 sec to read 29 messages totaling 175K.

   Added a new function \femailaddress(). Given a From: or Sender: header
   line from an RFC2822-format email address, extracts and returns the
   actual email address, such as kermit@columbia.edu. ckuusr.h,
   ckuus[42].c, 26 Nov 2005.

   Added a new format code 4 to \fcvtdate() to emit asctime() format, used
   in BSD-format email message envelopes (i.e. the "From " line).
   shuffledate(), ckucmd.c, ckuus[24].c, 26 Nov 2005.

   Discovered that Kermit's date parser, contrary to the documentation,
   failed to handle strings like "Wed, 13 Feb 2002 17:43:02 -0800 (PST)",
   which are commonly found in email. This was because of an overzealous
   and misguided check in the code; once removed, all was well. ckucmd.c,
   26 Nov 2005.

   Built a minimal version on Linux with: make linux "KFLAGS=-DNOLOCAL
   -DNOICP -DNOCSETS -DNODEBUG" Worked fine, result was 260K on i686. 21
   Nov 2005.

   Made a new library routine ckfstoa() that converts a file size or
   offset to a string. This is to solve the problem with having to use
   different printf() formats for different representations of file size
   (int, long, long long, off_t, signed, unsigned, etc). Replaced a few
   printf("%l",size) with printf("%s",ckfstoa(size)) with the expected
   results. This is just a start, the definitions will need adjustment for
   many platforms, variables need to be redeclared, and all the offending
   printf's (and printw's) will have to hunted down and converted.
   ckclib.[ch], ckuus4.c, 17 Nov 2005.

   Result: nothing, SSL_get_error() does not report any errors. Suggested
   testing SSL_read()'s return code, if 0 don't update the screen.

   Created a new data type CK_OFF_T in ckcdeb.h that will eventually
   resolve to whatever each platform uses for file sizes and offsets.
   ckcdeb.h, 17 Nov 2005.

Dev.06

   Added a debug() statement in FTP secure_getbyte() to see what's going
   on with Muhamad Taufiq Tajuddin's 205-byte-per-second FTP/SSL
   downloads.

Dev.05

   Added NOLONGLONG for SV68. ckcdeb.h, 11 Nov 2005.

   Fixed HELP INTRO text. ckuus2.c, 11 Nov 2005.

   The Unix version of C-Kermit failed to put anything in the session log
   if SET TERMINAL DEBUG ON. Rearranged the pertinent clause so logging
   happens independent of TERMINAL DEBUG. For now, since the user who
   noticed this wanted debug format to go into the session log, that's
   what I do. The alternative would be to just log the raw incoming stream
   as usual, or to add Yet Another SET Command to choose. ckucns.c, 11 Nov
   2005.

   I added a new variable \v(lastfilespec) that expands to the same last
   filespec, for use in scripts. ckuusr.h, ckuus4.c, 28 Oct 2005.

   An idea popped into my head after having typed too many commands like
   "dir ck[cuw]*.[cwh]" to check the list of matching files, and then
   having to retype the same filespec in a SEND command: Why not unleash
   some unused control character such as Ctrl-K to spit out the most
   recently entered input filespec? It was easy, just a few lines in
   cmifi2() and gtword(), plus a couple declarations. To see all the
   changes, search for "lastfile" (all the new code is protected by
   #ifndef NOLASTFILE). ckucmd.c, 28 Oct 2005.

   PeterE had been reporting problems stress-testing the new SWITCH code,
   but only on HP-UX 9, primarily stack overrun. Turns out to be the HP-UX
   9 optimizing compiler's fault. No optimization, no problems.

   PeterE found that even when dogoto() detects a string that is too long
   and fails, this does not stop SWITCH from producing a result, which can
   not possibly be trusted. Changed the part of dogoto() that handles this
   to not just fail, but also to exit the script immediately and return to
   top level. ckuus6.c, 28 Oct 2005.

   PeterE corrected a typo in the HP-UX 7.00 makefile target. 27 Oct 2005.

   Dev.04 didn't actually contain Jeff's data-type changes to shofeat(), I
   think I saved the wrong buffer in EMACS... Fixed now. 27 Oct 2005.

Dev.04

   Testing revealed there was still a problem with SWITCH case labels that
   were variables that expanded into long strings. Turns out that I was
   being too clever when I decided that, if the SWITCH macro was n1
   characters long and the case-label search target was n2 characters
   long, I only had to search the first n1-n2+1 characters of the macro
   definition. That was true before I allowed case labels to be variables,
   but not any more! Fixed in dogoto(): ckuus5.c, 26 Oct 2005.

   PeterE noticed that GOTO targets can only be 50 characters long. This
   was by design, a long time ago, on the assumption that nobody would
   make longer labels. But in SWITCH statements, case labels can be
   variables that expand to anything at all. If we chop them off at 50, we
   might execute the wrong case. Changed the maximum label size to be 8K,
   and added code to dogoto() to check when a label or target is too long
   and fail, to prevent spurious GOTO or SWITCH results. ckuusr.h,
   ckuus[r6].c, 26 Oct 2005.

   Defined NOLONGLONG ckcdeb.h for various old platforms where we know we
   are never going to need 64-bit ints (even if they support a long long
   datatype, chances are pretty slim they supported 64-bit file sizes).
   ckcdeb.h, 26 Oct 2005.

   From Jeff: changes to support OpenSSL 0.9.8, ck_ssl.h. ckcasc.h has had
   short names defined for ASCII control characters for 20-some years but
   now they are causing conflicts, so EM becomes XEM (also for OpenSSL
   0.9.8). Changed K95's default terminal type from VT320 to VT220 because
   VT320 termcaps/terminfos are disappearing from Unix hosts: ckuus7.c.
   Reorganize the data-types section of SHOW FEATURES to add more macro
   tests for integral sizes and to provide for the proper printf
   formatting in order to allow the sizes to be output ("You are going to
   need to be careful because %llx is not supported on all platforms. On
   Windows, it is the same as %lx, 32 bits"): ckuus5.c, 26 Oct 2005.

   New makefile targets for HP-UX from PeterE to handle the 'long long'
   situation. 26 Oct 2005.

   Added -DNOLONGLONG to sv68r3v6 target, makefile, 25 Oct 2005.

   Fixed a compiler warning in a debug() statement in zzstring() by adding
   parens. ckuus4.c, 24 Oct 2005.

Dev.03

   Found and corrected some misplaced #ifdefs in shofeat(), ckuus5.c, 23
   Oct 2005.

   From Jeff: some improvements to K95 GUI SHOW TERMINAL. ckuus5.c, 23 Oct
   2005.

   From Jeff: struct gss_trials initializers changed from gss_mech_krb5 to
   ck_gss_mech_krb5. ckcftp.c, 23 Oct 2005.

   From Andy Tanenbaum, final changes for MINIX3: #ifdef out the inline
   definitions for gettimeofday() and readlink(). ckutio.c, 23 Oct 2005.

   ckuus7.c(2987): warning #267: the format string requires additional
   arguments (in PURGE command); fixed 20 Oct 2005.

   Back to ckmatch()... Under certain conditions (e.g. patterns like
   *[abc]) failure to match would not stop the recursion because the
   string and pattern arguments are on the stack, as they must be, so
   there was no way for level n-1 to know that level n had detected a
   definitive nonmatch and that no further attempts at matching were
   required. The right way to handle this is to recode the whole thing as
   coroutines, the cheap way out is with a global static flag. Works
   perfectly, in the sense that the match.ksc test results are identical
   to what they were before and the extra backing up and recursion are
   eliminated. (The Oct 15th fix wasn't really a fix, it broke a couple of
   cases.) ckclib.c, 20 Oct 2005.

   For docs: if you don't like the funny business that happens when you
   type an IF command at the prompt, use XIF instead and it won't happen.
   Also note that commands like "if xxx { echo blah } else { echo blah
   blah }" don't work when typed at the prompt; you have to use XIF for
   this.

   Fixed a bug in FTP GET /COMMAND filename commandname; it always dumped
   core dereferencing a null string (the nonexistent local asname).
   ckcftp.c, 17 Oct 2005.

   Making ASKQ always echo asterisks is a bad idea, because when it
   doesn't echo, it's the perfect way to read silently from stdin, e.g. in
   a CGI script (INPUT can also be used for this but it's not as
   straightforward). So I put the default for ASKQ back to no echoing,
   then gave ASKQ its own switch table, which is the same as for ASK with
   the addition of an /ECHO:x switch, which tells what character to echo.
   ckucmd.c, ckuus[26].c, 17 Oct 2005.

   Added -DNOLONGLONG to HP-UX 8.00 and earlier builds, and to
   Motorola-based HP-UX 9.00 builds. This is simply to inhibit the test
   for whether "long long" is supported by the compiler, since when it
   isn't, the module containing the test won't compile. makefile,
   ckuus5.c, 16 Oct 2005.

   PeterE noticed that ckmatch(), even though it works pretty well now,
   does a lot of extra and unnecessary recursion after determining the
   string and pattern do not match, at least when the pattern is of the
   form *[abc]. After several false starts I was able reduce this effect
   to a minor level (but not eliminate it all together) by changing a
   while loop into a do loop. ckmatch(): ckclib.c, 15 Oct 2005.

   Special #ifdefs for finding resolv.h and nameser.h in MINIX3 from Andy
   Tanenbaum. ckcnet.c, 20 Sep 2005.

   Flen() fails on strings of length 8192 or more. The limitation is in
   the callers of zzstring, which seem to be specifying an 8K buffer, in
   this case fneval(). The operable symbols are FNVALL (max length of
   value returned by a function) and MAXARGLEN (maximum length of an
   argument to a function). I changed both of these for BIGBUFOK builds to
   be CMDBL. Buffers can never be infinite, there has to be a limit. It's
   important to make everything work consistently within that limit, and
   to make something useful happen when the limit is exceeded. At this
   point, I can probably also increase the limits for modern 32-bit
   systems, and certainly for 64-bit ones. Also there's no point in
   worrying about 16-bit platforms any more; earlier C-Kermit versions can
   still be used on them if necessary. ckuusr.h, 12 Sep 2005.

   That still didn't help with FREAD /SIZE:n returning less than n bytes,
   even when they were available. That's because the underlying routine,
   z_in(), didn't check fread()'s return code, which is the number of
   bytes read. If fread() has smaller buffers, it needs to be called in a
   loop. z_in(): ckuus7.c, 12 Sep 2005.

   FREAD does not get an error if it tries to read a record or file or
   piece of file that is too big for its buffer. In particular, FREAD
   /SIZE:xxx seems to succeed even if less than xxx was read. It should
   fail unless, perhaps, it successfully read up to the end of the file.
   Furthermore, if xxx is bigger than the file buffer size, it should
   complain. The buffer is line[LINBUFSIZ], 32K. The lack of failure was
   due to code in dofile() that adjusted the given size silently if it was
   greater than the buffer size, which I removed, and also added a check
   when parsing the /SIZE: switch. dofile(): ckuus7.c, 12 Sep 2005.

   PeterE discovered that "kermit -y filethatdoesnotexit" gives an
   erroneous error message that names the user's customization file,
   rather than the name given on the command line. doinit(): ckuus5.c, 12
   Sep 2005.

   PeterE found that certain patterns can still make Kermit loop; example:

if match T01011-00856-21-632-073 *[abc] { echo GOOD } else { echo BAD }
if match T01011-00856-21-632-073 *[a-z] { echo GOOD } else { echo BAD }

   The minimum offending pattern is * followed immediately by an [xxx]
   construction, followed by anything else, including nothing. Previous
   versions of Kermit handled this one correctly, without looping (but
   failed certain matches that should have succeeded). The new section of
   code I added on 15 June, upon failure to match, advances the string
   pointer and backs up the pattern to the previous pattern, and starts
   again (recursively). However, there needed to be a corresponding check
   at entry for an empty target string. ckmatch(): ckclib.c, 12 Sep 2005.

   Support of large files in 32-bit builds began in 10.20. 64-bit
   application support began in 11.00, but not all machines that run 11.00
   support 64 bits. About long files, see HP /usr/share/doc/lg_files.txt.

   Got 64-bit builds to work on HP-UX. According to my notes, John Bigg of
   HP said (in 1999) that HP-UX 10.30 and later require PA-RISC 1.1, and
   do not work on PA-RISC 1.0. But is PA 1.0 64-bit or what? Today, Alex
   McKale of HP said "The 64-bit binaries will work on all machines that
   have the same or later release of HP-UX (excluding PA-RISC 1.1
   machines)". Still need clarification... Maybe it's that all IA64 builds
   can be 64-bit but I need dual builds for PA-RISC. Meanwhile I started
   transfer of a 4GB+ file from Solaris to HP-UX 11i but it exceeded some
   quota on the HP long before it approached the 2G point. It failed
   cleanly and up until then it was working fine (numbers, stats, etc). 30
   Aug 2005.

   PeterE confirms that "long long" and off_t are available in all HP-UX
   10 and 11, and in HP-UX 9 on PA-RISC but not Motorola. 30 Aug 2005.

   Updated minix3 target from Andy Tanenbaum. makefile, 29 Aug 2005.

   Fixed a warning in HP-UX 10 and 11 stemming from some old-style
   prototypes in ckutio.c for get[re][gu]id(). ckutio.c, 29 Aug 2005.

   Added some stuff to SHOW FEATURES to see what kinds of macros are
   exposed (e.g. INT_MAX, LONG_MAX, LLONG_MAX, etc) and also show
   sizeof(long long) and sizeof(off_t). Building this code all over the
   place will give me an idea of how widespread these data types are, and
   to what extent I can tell whether they are available from clues in the
   header files. (At first glance, it appears that I'm not picking up
   <limits.h>, but adding an #include for it is just asking for trouble.)
   No complaints about long long or off_t from Solaris 9 or recent
   Linuxes. ckuus5.c, 28 Aug 2005.

   Compiling ckcnet.c and ckcftp.c got the familiar sockopt-related
   warnings on HP-UX 11i v2; turns out it is just like Tru64 Unix in using
   an int for the length argument. Added another special case and the
   warnings went away. ckcnet.h, 28 Aug 2005.

   Verified that 64-bit linking fails in the same way for HP-UX 11i v2 on
   both IA64 and PA-RISC. Sent a query to HP.

   Checked PeterE's complaint again of warnings in ckutio.c about
   parameter list of get[ug]id() and gete[ug]id(). When I "make hpux1100o"
   on HP-UX 11.11 (PA-RISC), there are definitely no warnings. He says the
   same thing happens on 10.xx, but I don't have access to that any more.
   I also did "make hpux1100o" on HP-UX 11.23 (11i v2) (PA-RISC), also no
   warnings. (Except in both cases, a warning about a comment within a
   comment in /usr/include/sys/ptyio.h). On HP-UX 11i v2 on Itanium,
   however, there are TONS of warnings, mostly of the "variable set but
   never used" kind. Also "dollar sign used in identifier". Tracking this
   last one down, I see it's complaining about code that's in #ifdefs for
   other platforms, such as Apollo Aegis. Is "aegis" defined in HP-UX 11i
   v2/IA64? No! (It would show up in SHOW FEATURES if it was.) Some phase
   of the compiler is complaining about code that it should be skipping
   (and that, in fact, it *is* skipping it because the build is
   successful). It's as if cc is running lint for me but not telling lint
   which macros are defined and which are not.

   I looked into the 64-bitness of NetBSD, it seems to be like Linux and
   FreeBSD on 64-bit hardware, i.e. you just build it there and it works,
   at least on Alpha and AMD64, going back to NetBSD 1.4 or 1.5. But I
   don't have access to any of these for verification and documentation on
   the Web is scanty.

   Eric Smutz complained that HTTP POST was adding an extraneous blank
   line, which prevented his application from successfully posting. RFC
   2616 states (in Section 4.1):

     In the interest of robustness, servers SHOULD ignore any empty
     line(s) received where a Request-Line is expected. In other words,
     if the server is reading the protocol stream at the beginning of a
     message and receives a CRLF first, it should ignore the CRLF.

     Certain buggy HTTP/1.0 client implementations generate extra CRLF's
     after a POST request. To restate what is explicitly forbidden by the
     BNF, an HTTP/1.1 client MUST NOT preface or follow a request with an
     extra CRLF.

   This seems pretty clear. One section of code in http_post() (just above
   the postopen: label) was appending a CRLF to a buffer whose last
   already was terminated by CRLF, and then appended a second CRLF; thus
   two empty lines. I removed the second one. ckcnet.c, 28 Aug 2005.

   From Jeff, 28 Aug 2005.
     * Fix SSH GLOBAL-KNOWN-HOSTS-FILE / USER-KNOWN-HOSTS-FILE parsing,
       ckuus3.c.
     * Pick up K95STARTFLAGS from environment, ckuus4.c.
     * Fix some typos in command-line processing (-q), ckuus4.c.
     * Be sure to suppress herald if started with -q, ckuus7.c.
     * Fix ssh command-line switches, ckuusy.c.

Dev.02: 27 Aug 2005

   Discovered that VMS C-Kermit on Alpha and IA64 is a 32-bit application;
   sizeof(long) == sizeof(char *) == 4. Tried adding /POINTER_SIZE=64 to
   VMS DECC builds on Alpha and IA64, but the results aren't great. Tons
   of warnings about pointer size mismatches between Kermit pointers and
   RMS ones, and the executable doesn't run. It appears that access to
   long files would require a lot of hacking, similar to what's needed for
   32-bit Linux.

   Backed off from rejecting a file because its announced size overflows a
   long. Now instead, I set the file size to -2 (a negative size means the
   size is unknown, but we have always used -1 for this; -2 means "unknown
   and probably too big"). In this case, the f-t display says:

  File Size: POSSIBLY EXCEEDS LOCAL FILE SIZE LIMIT

   then the user can interrupt it with X or whatever, or can let it run
   and see if maybe (as in the case of Mac OS X) it will be accepted
   anyway. This way, we skip all the bogus calculations of percent done,
   time remaining, etc. ckcfn3.c, ckuusx.c, 27 Aug 2005.

   Took the time to verify my recollection about the "graceful failure" on
   a regular Pentium Linux system when receiving a too-big file... OK,
   it's not exactly graceful. It gets a "File size limit exceeded" error;
   the message is printed in the middle of the file-transfer display,
   apparently not by Kermit, and Kermit exits immediately. Looks like a
   trap... Yup. "File size limit exceeded" is SIGXFSZ (25). What happens
   if we set it to SIG_IGN? Just the right thing: The receiver gets "Error
   writing data" at 2147483647 bytes, sends E-packet to sender with this
   message, and recovers with total grace (drains packet buffers, returns
   to prompt). ckutio.c, 27 Aug 2005.

   The HP-UX 11i/ia64 build comes out to be 32-bit but thinks it's 64-bit.
   CK_64BIT is set because __ia64 is defined. So how do I actually make a
   64-bit HP-UX build? I tried adding +DD64 to CFLAGS, and this generates
   64-bit object files but linking fails to find the needed 64-bit libs
   (e.g. -lm). For now I added an exception for HPUX to the CK_64BIT
   definition section. ckcdeb.h, 27 Aug 2005.

   Now to check the effects on other builds...
  Linux on AMD64: ok.
  Linux on IA64: ok.
  Linux on i386: ok.
  Mac OS X 10.3.9 32-bit: ok.
  Solaris 10 64-bit: ok.
  Solaris 9 32-bit: ok.
  Tru64 4.0F: ok.
  FreeBSD 4.11: ok.
  FreeBSD 5.4 ia64 (64-bit): ok.
  FreeBSD 5.4 i386 (32-bit): ok.

   The Tru64 5.1B build totally blew up because they have their own unique
   sockopt/etc length-argument data type (int!), so I had to roll back on
   using socklen_t for this in all 64-bit builds. Checked to make sure it
   still builds on Tru64 4.0F after this change (it does). ckcnet.h, 27
   Aug 2005.

   Got rid of all the warnings in 64-bit Mac OS X about args to
   getsockopt(), getsockname(), and getpeername(), and the comparisons on
   the return value of inet_addr(). ckcnet.[ch], 27 Aug 2005.

   Added a built-in variable \v(bits) to indicate the size of the build
   (16, 32, 64, or whatever else sizeof() might report). ckuusr.h,
   ckuus4.c, 27 Aug 2005.

   Created a symbol CK_64BIT to indicate true 64-bit builds at compile
   time. Added 64-bit announcement to the startup herald and the VERSION
   text. ckcdeb.h, ckuus[r5].c, 27 Aug 2005.

   Mac OS X 10.4 (Tiger) is a 64-bit OS. Building C-Kermit 0n 10.4.2
   without any special switches stilll gives a 32-bit executable. Ditto
   building with -mpowerpc64. Further investigation turned up a tip sheet
   on MySQL that says you have to include all of these: -mpowerpc64
   -mcpu=G5 -mtune=G5 -arch ppc64. That did the trick. New makefile
   target: macosx10.4_64. But the 10.4.2 system I tried did not have
   64-bit [n]curses or resolv libs, so this build has no -DNOCURSES
   -DNO_DNS_SRV. makefile, 27 Aug 2005.

   Got rid of all the extraneous FreeBSD 4 and 5 build targets. Now
   there's one (freebsd) for all FreeBSD 4.1 and later. makefile, 27 Aug
   2005.

   From now on I'm going to bump the Dev.xx number each time I upload a
   new ckdaily. This one will be Dev.02. ckckmai.c, 26 Aug 2005.

   As I recall from when I was testing this a few weeks ago, when the
   too-big length is not caught at A-packet time, the transfer fails more
   or less gracefully when the first attempt is made to write past the
   limit. I went to doublecheck this by sending a big file from the 64-bit
   Solaris10 version to a 32-bit Mac OS X version that does not have
   today's code. The Mac thinks the incoming file is 2GB long when it's
   really 4GB+. But in this case, something new happens! Although the
   percent done and transfer rate go negative, the file keeps coming. It
   would seem that Mac OS X lets us create long files without using any
   special APIs. The transfer runs to completion. Mac OS X Kermit says
   SUCCESS (but gets the byte count and cps wrong, of course). But then a
   STATUS command says FAILURE. The file was, however, transferred
   successfully; it is exactly the same length and compares byte for byte
   with the original. This tells me that in the Mac OS X version -- and
   how many others like it??? -- today's rejection code should not be
   enabled. Meanwhile I put today's new code in #ifndef
   NOCHECKOVERFLOW..#endif, and defined this symbol in the Mac OS X 10.4
   target. Over time, I'll have to find out what other platforms have this
   characteristic. And of course I'll also have to do something about
   file-transfer display, statistics, and status. makefile, ckcfn3.c, 26
   Aug 2005.

   Back to long files. What happens if 32-bit Kermit is sent a long file?
   It gets an A-packet that looks like this:

^A_"A."U1""B8#120050815 18:28:03!'42920641*4395073536,#775-!7@ )CP

   The 32-bit receiver reacts like so:

gattr length[4395073536]=100106240

   the first number being the string from the A-packet, the second being
   the value of the long int it was converted to by atol(). Clearly not
   equal in this case. When this happens Kermit should reject the file
   instead of accepting it and then getting a horrible error a long time
   later. Added code to gattr() to convert the result of atol() back to a
   string and compare it with the original string; if they're not equal,
   reject the file on the assumption that the only reason this could
   happen is overflow. Also some other code in case the sender sends the
   only LENGTHK attribute. Now files whose lengths are too big for a long
   int are rejected right away, provided the sender sends the length in an
   A packet ahead of the file itself. If this new code should ever cause a
   problem, it can be bypassed with SET ATTRIBUTE LENGTH OFF. ckcfn3.c, 26
   Aug 2005.

   A report on the newsgroup complains that C-Kermit and K95 servers were
   sending REMOTE DIR listings with only #J line terminators, rather than
   #M#J. Yet all the other REMOTE xxx responses arrived with #M#J.
   snddir() was neglecting to switch to text mode. ckcfns.c, 26 Aug 2005.

   Problem reported when sending a file to VMS when the name in the F
   packet starts with a device specification and does not include a
   directory field, and PATHNAMES are RELATIVE. Example: dsk:foo.bar
   becomes f_oo.bar. The code assumes that if there is a device field, it
   is followed by a directory field, and it inserts a dot after the '[',
   which in this case is not there. Later the dot becomes '_' because of
   the only-one-dot rule. Solution: only insert the dot if there really is
   an opening bracket. nzrtol(): ckvfio.c, 23 Aug 2005.

   Fixed a bug in the ASKQ echo asterisks code, which made the VMS version
   of C-Kermit always echo asterisks. Turns out that some code in the main
   parse loop to reset command-specific flags was in the wrong place,
   which had other effects too, for example ASKQ temporarily turns off
   debug logging as a security measure, but the code to turn it back on
   was skipped in most cases. Some other side effects related to the
   DIRECTORY and CD commands might have been possible but I haven't seen
   them. ckuus[56].c, 23 Aug 2005.

   On AMD x86_64 and IA64 native 64-bit Linux builds, the pty routines did
   not work at all. ptsname() dumped core. If I commented out ptsname(),
   then the next thing dumped core. The same code works on the other
   64-bit builds. Poking around, I see that this version of Linux has an
   openpty() function, which I could try using instead of the current API
   -- grantpty(), etc. Then I see that openpty() is already coded into
   Kermit's pty module, conditionalized under HAVE_OPENPTY, which has
   never before been defined for any build. I added a test to the makefile
   linux target (look for the openpty() prototype in <pty.h>, if found
   define HAVE_OPENPTY as a CFLAG and also add -lutil to LNKFLAGS). Works
   fine on the problem builds, and also on previously working 32-bit
   builds. makefile, 17 Aug 2005.

   Added a solaris9_64 target for building a 64-bit version on Solaris 9
   with Sun cc. Verified, using the DIR command and \fsize() function on a
   4.4GB file, that the Solaris 64-bit version of Kermit gets the size
   correctly, and that it can copy such a file (thus its
   fopen/fread/fwrite/fclose interface works right). Initiated a
   large-file transfer between here and Utah over SSH and verified that it
   puts the correct file size in the A packet when sending; the right
   quantities are shown on the file transfer display (file size CPS,
   percent done, etc). But even at 5Mb/sec, it takes a good while to
   transfer 4.4GB, more than 2 hours (not streaming; 30 window slots, 4K
   packets, maybe it would go faster with streaming)... After an hour or
   so, it filled up the partition and gave up (gracefully) before it
   reached the 2GB frontier (drained its pending packets, closed the
   partial file). Restarted at 12:54, this time with streaming and 8K
   packets (the speed wasn't significantly different). This time it
   transferred 95% of the file (4187660288 bytes) before failing because
   the disk filled up. Went to Utah and started a transfer between two
   Solaris 10/Sparc hosts; this goes about 8 times faster. The transfer
   completed successfully after 17m41s. All fields in the f.t. display
   looked right the whole time. Then I verified various other 64-bit
   combinations transferring the same 4.4GB file:

      To................
From  Sol  Amd  i64  Tru
Sol   OK   OK   OK   OK      Sol = Solaris 10 / Sparc
Amd   OK                     Amd = AMD x86_64 RH Enterprise Linux AS4
i64   OK                     i64 = Intel IA64, RH 2.1AS
Tru                          Tru = Tru64 Unix 4.0F Alpha

   (The other combinations are difficult to test for logistical reasons.)

   Tried sending the same long file with Kermit's FTP client. It chugged
   along for a while until I stopped it; it would have taken hours to
   complete. There is no indication that it wouldn't have worked, assuming
   the FTP server could also handle long files, which who knows. Anyway,
   Kermit showed all the right data on the display screen. 17 Aug 2005.

   Changed the plain-text version (as opposed to the popup or GUI version
   - the GUI version, at least, already does this) of ASKQ to echo
   keystrokes asterisks rather than simply not echo anything, so it's
   easier to see what you're doing, the effects of editing, etc.
   Experimental; for now, there's no way to disable this. Not sure if
   there needs to be. Anyway, to get this working required a fair amount
   of cleaning up of gtword(), which was echoing different ways in
   different places. ckuus6.c, ckucmd.c, 15 Aug 2005.

   The 64-bit Solaris 10 version compiles and links OK and transfers files
   in remote mode. It can make FTP connections and use them, but Telnet
   connections always fail with "network unreachable". This is with all
   default libs and include files. Nelson has a separate set in
   /usr/local, which he references explicitly in all his 64-bit builds,
   but using these makes no difference. Some data type is wrong in
   ckcnet.c. But telnet works fine in 64-bit Linux and Tru64 builds. Debug
   logs trace the difference to netopen() (of course), the spot where we
   test the results of inet_addr(), which is already marked suspicious for
   64-bit builds. It seems that inet_addr() is of type in_addr_t, which in
   turn is u_int32, i.e. an unsigned 32-bit int. Yet the man page says
   that failure is indicated by returning -1. I guess this doesn't matter
   in 32-bit builds, but in the 64-bit world, the test for failure didn't
   work right. I made a Solaris-specific workaround, and checked that it
   works in both 32-bit and 64-builds. I really hate typedefs. ckcnet.c,
   15 Aug 2005.

   Managed, after some finagling, to build a 64-bit version on Solaris 10
   at Utah Math with Sun cc. (Can't make any gcc builds at all, 32- or
   64-bit, they all blow up in <sys/siginfo.h>.) New target: solaris10_64.
   makefile, 15 Aug 2005.

   Unbuffered stdout code has never worked because the setbuf(stdout,NULL)
   call has to occur before the stdout has been used. The reason it's
   needed is that some Kermit code writes to stderr (which is unbuffered)
   and other code writes to stdout, and therefore typescripts can come out
   jumbled. Robert Simmons <robertls@nortel.com> provided the needed clue
   when he insisted it worked only when executed at the very beginning of
   main(). So I moved the code to that spot. But since now we also want to
   make unbuffered a runtime (command-line) option, I had to do a clunky
   by-hand pre-prescan inline in main() to look thru argv[], even before
   prescan() was called. ckcmai.c, ckutio.c, ckuusy.c, 13 Aug 2005. (Now
   that this works, it might be a good idea to remove all use of stderr
   from Kermit.)

   Unix isdir() never allowed for arguments that started with tilde, so
   gave incorrect results for ~/tmp/ or ~fdc. The problem was mainly
   invisible since most commands that parsed file or directory names used
   cmifi(), cmdir(), etc, which did the conversions themselves. But IF
   DIRECTORY was an exception, since its operand had to be treated as just
   text, and then tested after it was parsed. ckufio.c, 13 Aug 2005.

   Fixed the following: "ckuusx.c", line 8959: warning: implicit function
   declaration: ckgetpeer "ckufio.c", line 1869: warning: implicit
   function declaration: ttwait "ckufio.c", line 2941: warning: implicit
   function declaration: mlook "ckufio.c", line 2943: warning: implicit
   function declaration: dodo "ckufio.c", line 2944: warning: implicit
   function declaration: parser "ckcftp.c", line 2625: warning: implicit
   function declaration: delta2sec "ckcftp.c", line 4071: warning: no
   explicit type given for parameter: prm "ckcftp.c", line 8389: warning:
   no explicit type given for parameter: brief ckuusx.c, ckufio.c,
   ckcftp.c, ckucmd.h. 13 Aug 2005.

   Added automatic herald construction for UnixWare 7. makefile, 12 Aug
   2005.

   For docs and/or scriptlib: Unix C-Kermit can be a stdin/out filter. The
   trick is to use the ASK, ASKQ, or GETC command for input, specifying no
   prompt, and ECHO or XECHO for output, e.g.:

while true {
    ask line
    if fail exit 0
    echo \freverse(\m(line))
}
exit 0

   FOPEN didn't do anything with the channel number if the open failed, so
   any subsequent command that tried to reference it would get a parse
   error it was undefined or non-numeric, not very helpful. Changed FOPEN
   to set the channel number to -1 if the file can't be opened. Now
   subsequent operations on the channel fail with "Channel -1: File not
   open". I also added two magic channel numbers: -8 means that any FILE
   command (besides OPEN and STATUS) on that channel is a noop that
   succeeds silently; -9 is a noop that fails silently. So now it's
   possible to simply set a channel number to one of these values to
   disable i/o to certain file without getting lots of error messages.
   dofile(): ckuus7.c, 12 Aug 2005.

   Built OK on Solaris 9, Solaris 10 (with a few implicit declaration
   warnings in ckuusx.c), Mac OS X 10.4.2 (with some warnings in ckcnet.c
   and ckcftp.c), Mac OS X 10.3.9 (also using the macos10.4 entry, which
   gets the right version number, and gets no warnings at all), RH
   Enterprise Linux AS4 on AMD x86_64, Tru64 Unix 4.0F, SCO UnixWare 7.1.4

   Added a new makefile target, macosx10.4, for Mac OS X 10.4. This one
   uses an undocumented trick to get the otherwise
   unavailable-except-by-clicking Mac OS X version number (in this case
   10.4.2) and stuff it into the HERALD string. makefile, 11 Aug 2005.

   See correspondence with Mark Sapiro, Nov 2003 and Sep 2004, about
   certain variations on IF syntax having been broken by the introduction
   of "immediate macros" circa 1999. It seems the problem -- variables not
   being expanded -- always occurs in the ELSE part when (a) the IF
   condition is false; (b) the ELSE command is "standalone", i.e.
   expressed as a separate command after the IF command (original C-Kermit
   5A syntax), and (c) its command list is a block. This would suggest the
   problem is in the XXELS parser.

   Going back to 1999, I find this:

     Fixed a problem Jim Whitby noticed with quoting in ELSE statements.
     This problem was introduced when I unified IF and XIF, and occurs
     only when ELSE begins on a line, followed by a { command list }
     rather than a single command. The solution (gross) was to make a
     special version of pushcmd() (called pushqcmd()) for this situation,
     which doubles backslashes while copying, BUT ONLY IF it's a command
     list (i.e. starts with "{"); otherwise we break lots of other stuff.
     Result passes Jim's test and still passes ckedemo.ksc and
     iftest.ksc. ckucmd.c, ckuus6.c, 27 Sep 99.

   I undid this change and it made no difference to all the other IF
   constructions (in fact, it fixed an unrelated one that was broken, so
   now iftest scores 54 out of 54, instead of 53). However, it does not
   fix the ELSE problem; in fact it pushes it all the way in the other
   direction:

     The opposite occurs any time you try to execute an immediate macro
     inside a macro or any other { block }: not only is the variable
     evaluated, it is evaluated into nothing. It looks like this happens
     only in immediate macros, i.e. *commands* that start with '{'. So
     maybe we really have two isolated problems, that can each be fixed.

   The situation is illustrated by this simple script:

def xx {
    if false { echo \%1, echo \%2 }
    else { echo \%3, echo \%4 }
}
xx one two three four

   With pushqcmd() it echoes the variable names literally; with pushcmd()
   it echoes empty lines. Since ELSE, when its argument is a block,
   dispatches to the immediate-macro handler, it seems we have unified the
   two problems, so fixing one should fix the other.

   The problem is that we define a new temporary macro and then call
   dodo() to execute it. But if the definition contains macro arguments,
   we have added a new level of macro invocation, thus wiping out the
   current level of args. The cure is to expand the variables in the
   immediate macro in the current context, before executing it. This means
   simply changing the cmtxt() call that reads the immediate macro to
   specify zzstring as its processing function, rather than NULL, which is
   used for real macros to defer their argument evaluation until after the
   macro entered. ckuusr.c, 11 Aug 2005.

   Compact substring notation extended to accept not only start:length but
   also start-end notation. Thus \s(foo[12:18]) means the substring of foo
   starting at position 12 of length 18, and tne new \s(foo[12-18]) means
   the substring of foo starting at position 12 and ending with position
   18. Ditto for \:(\%a), etc. ckuus4.c, 9 Aug 2005.

   Built on BSDI 4.3.1. Added -DCKHTTP.

   Added -DCKHTTP to Mac OS X 10.3-.4 KFLAGS. Makefile, 4 Aug 2005.

   Built OK on Mac OS X 10.4.2 using macosx103 target (but with some
   "signedness" warnings in ckcnet.c and ckcftp.c). Built on Unixware
   7.1.4 with uw7 target. 27-28 Jul 2005.

   Changed SET WILD OFF help text to warn that this setting prevents the
   creation of backup files (later I'll have to see if something more
   useful can be done about this). ckuus2.c, 18 Jul 2005.

   Added missing help text for \fb64encode() and \fb64decode(). ckuus2.c,
   18 Jul 2005.

   Fixed the June 16th fix to the pattern matcher. I fixed a real problem,
   but I made an unrelated optimization that introduced new ones.
   ckclib.c, 18 Jul 2005.

   HTTP GET would fail if the URL contained any metacharacters, no matter
   how much you quoted them. Although it uses cmfld() to parse the
   (partial) URL, it then uses cmofi() to get the output filename, which
   by default is the "filename" from the URL, which might be something
   like "rankem.asp?id=1639". cmofi() refuses to accept unquoted
   metacharacters in "filenames" and that's what happens in this case if
   the output filename is not specified. Worked around this by disabling
   wildcard processing around HTTP GET using the new "wildena" variable
   from June 15th. ckuusr.c, 18 Jul 2005.

   Added #ifndef OSF40..#endif around definition of inet_aton() in
   ck_ssl() to allow building in Tru64. Added tru64-51b+openssl to
   makefile. 15 Jul 2005.

   Defined CKHTTP for NetBSD, the HTTP code builds and works fine there.
   ckcdeb.h, 2 Jul 2005.

   Added builds and designer banner for Solaris 10. makefile, ckuver.h, 27
   Jun 2005.

   The GREP command, and probably anything else that uses ckmatch() for
   pattern matching, failed on patterns like */[0-3]*.html. The [a-b]
   handler, when failing to match at the current position, neglected to
   back up the pattern and try again on the remainder of the string. I
   also fixed another case, in which matching a literal string a*b?c
   against the pattern a[*?]*[?*]c caused ckmatch() to recurse until it
   blew up. ckclib.c, 16 Jun 2005.

   Improved and fixed typos in HELP WILDCARD and HELP PATTERN. ckuus2.c,
   15 Jun 2005.

   Suppose (in Unix, for example) a filename contains wildcard characters,
   such as {abc}.txt. When referring to such a file (e.g. in a SEND
   command), these characters can be quoted, e.g. \{abc\}.txt. But if the
   file list has been obtained programmatically, e.g. stored in an array,
   there is no way, short of tedious, complicated, and error-prone string
   processing, to reference the file. For this we need a way to disable
   wildcard processing. I added { ON, OFF } choices for the SET WILD and
   SHOW FILE commands: ckuusr.h, ckuus[234].c. { ON, OFF } turns
   wildcarding off and on without affecting the { KERMIT, SHELL } agent
   choice; it does this by setting a new and separate global variable,
   wildena. Added semantics to ckufio.c. Crude but effective. It might
   have been more Unixlike to add Yet Another form of quoting but we have
   enough of that already (later maybe I'll add a \function() for this).
   Needs to be propagated to Windows and VMS. 15 Jun 2005.

   Fixed SET TERMINAL IDLE-ACTION OUTPUT to work as documented, namely if
   the output string is empty, to send a NUL. Previously there was no way
   to make it send a NUL. ckuus7.c, 15 Jun 2005.

   Fixed error in ckuver.h NetBSD #ifdefs. 15 Jun 2005.

   From Jeff: New build target for Mac OS X 10.3 with Kerberos 5 and SSL.
   makefile, 14 Jun 2005.

   Built on Solaris 9 and NetBSD 2.0.

   Added -DHAVE_PTMX to linux+krb5+openssl+zlib+shadow+pam. From Timothy
   Folks. makefile, 12 Jun 2005.

   Removed reference to defunct fax number, ckcmai.c, 12 Jun 2005.

   Added the long-needed \flopx() function, to return rightmost pieces of
   strings, such as file extensions. \fstripx() and \flopx() are the
   orthogonal functions we need to pick filenames apart from the right:
   \stripx(foo.tar.gz) = foo.tar; flopx(foo.tar.gz) = gz. ckuusr.h,
   ckuusr.c, ckuus2.c, 12 Jun 2005.

   Made \fdirectory() a synonym for \fdirectories(). Made \fdir() an
   acceptable abbreviation for these, even though it clashes with
   \fdirname(), which still works as before. ckuus4.c, 12 Jun 2005.

   Fixed a bug in which \fdir() wouldn't work when its argument was the
   nonwild name of a directory file. zxpand(): ckufio.c, 12 Jun 2005.

   Added IF LINK (Unix only) to test if a filename is a symlink. Uses the
   most simpleminded possible method, calls readlink() to see if it
   succeeds or fails. No other method is dependable across different
   Unixes. This code should be portable because I already use readlink()
   elsewhere within exactly the same #ifdefs. ckufio.c, ckuus2.c,
   ckuus6.c, 12 Jun 2005.

   Put HELP SET TERMINAL DG-UNIX-MODE text where it belonged. ckuus2.c, 12
   Jun 2005.

   Added LMV as a synonym for LRENAME, which is itself a synonym for LOCAL
   RENAME. ckuusr.c, 12 Jun 2005.

   Fixed getiact() (which displays TERM IDLE-ACTION setting) to display
   space as \{32}. ckuus7.c, 12 Jun 2005.

   Made a command-line option --unbuffered to do what the -DNONOSETBUF
   compile-time option does, i.e. force unbuffered console i/o. Unix only.
   ckuusr.h, ckuusy.c, ckutio.c, 12 Jun 2005.

   Added SET TERMINAL LF-DISPLAY, like CR-DISPLAY but for linefeed rather
   than carriage return. ckuusr.h, ckuus[257x].c, 12 Jun 2005.

   From Matthias Kurz: automatic herald generation for NetBSD 2.0 and
   later, "make netbsd2". ckuver.h, makefile, 12 Jun 2005.

   From Jeff (12 June 2005):
     * Security updates. ck_ssl.c, ck_crp.c, ckuath.c.
     * Fix bug in K95 SET PRINTER CHARACTER-SET. ckuus3.c.
     * Add printer character-set to K95 SHOW PRINTER display. ckuus5,c
     * Add SET MSKERMIT FILE-RENAMING to K95. ckuus7.c, ckuusr.h.
     * Add help for K95 SET MSKERMIT. ckuus2.c.
     * Add SET GUI CLOSE to K95. ckuusr.h, ckuus2.c, ckuus3.c
     * Add help text for K95 SET GUI MENUBAR and TOOLBAR. ckuus2.c.
     * Add --noclose command-line option for K95. ckuusy.c
     * Add PAM support for Mac OS X. ckufio.c.
     * Add GSSAPI support for Mac OS X. ckcftp.c.
     * Pick up more URL options. ckcker.h, ckuusy.c.
     * Fix bug in delta-time calculation across year boundary. ckucmd.c.
     * Add Secure Endpoints to copyright notices. ckcmai.c.
     * Fix FTP HELP to override unverbose setting. ckcftp.c.
     * Fix assorted minor typos.

   Fixed messed-up sndhlp() call which apparently had been jiggered to
   compensate for the bad prototype which has now been fixed, ckcpro.w, 12
   Jun 2005.

   From Andy Tanenbaum (28 May 2005):
     * Fix an errant prototype in ckcker.h and ckucmd.h - () instead of
       (void).
     * Add support for MINIX 3.0. makefile, ckutio.c, ckufio.c, ckuver.h.

   From Dave Sneddon: an updated CKVKER.COM containing a fix where the
   COMPAQ_SSL symbol was not defined but later referenced which generated
   an undefined symbol error. ckvker.com, 5 Jan 2005.

   Server side of REMOTE MESSAGE: ckcpro.w, 23 May 2004.

   Added client side of REMOTE MESSAGE/RMESSAGE/RMSG: ckuus[r27].c, 23 May
   2004.

   FTP CD did not strip braces or quotes from around its argument. Fixed
   in doftprmt(): ckcftp.c, 23 May 2004.

   DIAL MACRO fix was not right; the quotes were kept as part of the phone
   number and sent to the modem. dodo() pokes its argument to separate the
   macro argument string into its component arguments. xdial() is called
   repeatedly on the same string, so after the first time, a NUL has been
   deposited after the first word of the telephone number. The fix is to
   have xdial() create a pokeable copy of its argument string before
   calling dodo(dial-macro,args...). It might seem odd that dodo pokes its
   argument, but making copies would be would be prohibitive in space and
   time. ckuus6.c, 23 May 2004.

   When a DIAL MACRO is defined and the phone number is comprised of more
   than one "word" (i.e. contains spaces), the dial macro loses the second
   and subsequent words after the first call. Fixed in xdial() by
   inserting quotes around phone number before passing it to xdial().
   ckuus6.c, 10 May 2004.

   If the local Kermit's parity is set to SPACE and then a file arrives
   via autodownload, automatic parity detection improperly switches it to
   NONE. Fixed in rpack() by switching parity automatically only if
   parchk() returns > 0 (rather than > -1), since NONE and SPACE are
   indistinguishable. A bigger problem still remains: autodownload does
   not work at all if the sender is using actual parity bits (even, odd,
   or mark) and the receiver's parity is NONE. ckcfn2.c, 10 May 2004.

   Red Hat 7.3 (and maybe others) <baudboy.h> referenced open() without
   first ensuring it was declared. The declaration is in <fcntl.h>, which
   is after <baudboy.h> in ckutio.c series of #includes. Made a special
   case for this. ckutio.c (see comments), 10 May 2004.

   S-Expression (AND FOO BAR) would not short-circuit if FOO's value was
   0, even though short-circuiting code has been there since Day 1.
   Similarly for (OR BAR FOO). Turns out the first operand was a special
   case that bypassed the short-circuit check. Fixed in dosexp():
   ckuus3.c, 10 May 2004.

   From Jeff, applied 10 May 2004.

     * Rearrange #ifdefs that define OS/2-only features. ckcdeb.h.
     * Fix two strncat()s that should have been ckstrncat()s. ckuus7.c.
     * Fix two strncat()s that should have been ckstrncat()s. ckuus4.c.
     * Fix one strncat(). ckcfns.c.
     * SET FTP CHAR ON used backwards byte order when output to screen.
       ckcfns.c.
     * Fix two strncat()s. ckuus3.c.
     * Add SET NETWORK TYPE NAMED-PIPE for K95. ckuus3.c.
     * Add "No active connections" message to hupok(). ckuus3.c.
     * Fix many strncat()s. ckcnet.c.
     * Fix some strncat()s. ckcftp.c
     * Make FTP port unsigned short for 16383 < port < 65536. ckcftp.c.
     * Improvements to FTP USER command. ckcftp.c.
     * Fix FEAT parsing to allow for various forms of whitespace.
       ckcftp.c.

   Removed "wermit" from "make clean" (how did it get there?). makefile.

8.0.211

   Removed Beta designation, released as 8.0.211, 10 Apr 2004.

   I had somehow lost the edit to ckutio.c that changed the UUCP lockfile
   for Mac OS X from /var/spool/uucp to /var/spool/lock. So I slipped it
   in and re-uploaded version 8.0.211. You can tell the difference because
   SHOW VERSIONS has 17 Apr 2004 for the Communications I/O module. Also
   the 10.3 executable now has a designer banner: "Mac OS X 10.3".
   makefile, ckuver.h, ckutio.c, ckuus[45].c, 17 Apr 2004.

   While doing the build-all, I noticed the VMS version did not build with
   Multinet or older UCX versions, always with the same errors --
   undeclared variables, undefined symbols, all TCP/IP related. This
   didn't happen a couple weeks ago... Somehow the order of #includes was
   messed up -- ckuusr.h depended on symbols that are defined in ckcnet.h,
   but ckcnet.h was being included after ckuusr.h... this was compounded
   by two missing commas in ckvker.com. 11 Apr 2004.

   Traced problems in VMS/IA64 statistics report to rftimer()/gftimer() in
   ckvtio.c, which use sys$ and lib$ calls to figure elapsed time. These
   work on VAX and Alpha but not IA64. Sent a report to the chief engineer
   of the IA64 VMS port; he says it's probably a bug in VMS 8.1 (which is
   not a real release); he'll make sure it's fixed in 8.2. As an
   experiment, tried swapping in the Unix versions of these routines
   (which call gettimeofday() etc). They seem work just fine (it hung a
   couple times but I think that's because the underlying system hung too;
   trying it later on a new connection, it was fine; however I noticed a
   BIG discrepancy in throughput between sending and receiving). Moved
   definitions for VMS64BIT and VMSI64 to ckcdeb.h so all modules can use
   them and added them to the SHOW FEATURES display. Added VMSV80
   definition to build procedure. Beta.03+. ckcdeb.h, ckcuus5.c,
   ckcvvms.h, ckvtio.c, ckvker.com, 6 Apr 2004.

   Fixed the ckdaily script to include the makefile and man page in the
   Zip file (they were not included because the Zip file was intended
   mainly for VMS users, but some Unix users prefer Zip to tar.gz). 6 Apr
   2004.

   Got access to VMS 8.1 on IA64. Building the nonet version of C-Kermit
   required minor modifications to ckvvms.h, ckv[ft]io.c, and ckvcon.c, to
   account for a third architecture. Also to SHOW FEATURES in ckuus5.c.
   Once that was done, the UCX 5.5 version built OK too. Starts OK, makes
   Telnet connection OK, sends files. Has some obvious glitches though --
   "stat" after a file transfer reports 0 elapsed time (in fact it was
   00:09:48) and 1219174400 cps (when in fact it was 10364). This doesn't
   happen on the Alpha. Btw, the IA64 binary is twice as big as the Alpha
   one. Changed to Beta.03. 5 Apr 2004.

   Problem: SCO XENIX 2.3.4 network build failed in the FTP module with
   header-file syntax and conflicting-definitions trouble. I'm not going
   to try to fix it; 8.0.209 built OK with FTP, so we'll just keep that
   one available.

   3-4 Apr 2004: More 8.0.211 Beta.02+ test builds:

     * FreeBSD 3.3
     * FreeBSD 4.4
     * Linux Debian 2.1
     * Linux RH 6.1
     * Linux RH 7.1
     * Linux RH 7.2
     * Linux RH 9 (with 84 different combinations of feature selection)
     * Linux SuSE 6.4
     * Linux SuSE 7.0
     * NetBSD 1.4.1
     * NetBSD 1.5.2
     * OpenBSD 2.5
     * OpenBSD 3.0
     * QNX 4.25
     * SCO UnixWare 2.1.3
     * SCO UnixWare 7.1.4
     * SCO OpenServer 5.0.7
     * SCO XENIX 2.3.4 (no TCP)

   Changes needed: None.

   Looked into FTP timeouts. It appears I can just call empty() (which is
   nothing more than a front end for select()) with the desired timeout
   before any kind of network read. If it returns <= 0, we have a timeout.
   This is not quite the same as using alarm() / signal() around a recv()
   (which could get stuck) but alarm() / signal() are not not used in the
   FTP module and are not naturally portable to Windows, but select() is
   already in use in the FTP module for both Unix and Windows. This form
   of timeout could be used portably for both command response and data
   reads. What about writes to the command or data socket? They can get
   stuck for hours and hours without returning too, but the select()
   approach won't help here -- we need the actual send() or recv() to time
   out, or be wrapped in an alarm()/signal() kind of mechanism. But if we
   can do that for sends, we can also do it for receives. Better check
   with Jeff before I start programming anything. 20 Mar 2004.

   Later: Decided to postpone the above two projects (ditto IPv6) until
   after 8.0.211 is released because both will have major impacts on
   portability. Grumble: all i/o APIs should have been designed from the
   beginning with a timeout parameter. To this day, hardly any have this
   feature.

   20 Mar 2004: Looked into adding long file support, i.e. handling files
   more than 2GB (or 4GB) long. Discovered very quickly this would be a
   major project. Each platform has a different API, or environment, or
   transition plan, or whatever -- a nightmare to handle in portable code.
   At the very least we'll need to convert a lot of Kermit variables from
   long or unsigned long to some new Kermit type, which in turn is
   #defined or typedef'd appropriately for each platform (to off_t or
   size_t or whatever). Then we have to worry about the details of open()
   vs fopen(); printf() formats (%lld vs %Ld vs %"PRId64"...), platforms
   like HP-UX where you might have to use different APIs for different
   file systems on the same computer, etc. We'll need to confront this
   soon, but let's get a good stable 8.0.211 release out first! Meanwhile,
   for future reference, here are a few articles:

 General:  [83]http://freshmeat.net/articles/view/709/
 Linux:    [84]http://www.ece.utexas.edu/~luo/linux_lfs.html
 HP-UX:    [85]http://devrsrc1.external.hp.com/STK/partner/lg_files.pdf
 Solaris:  [86]http://wwws.sun.com/software/whitepapers/wp-largefiles/largefiles
.pdf

   From Jeff, 14 Mar 2004:
     * Initialize localuidbuf[] in tn_snenv(): ckctel.c.
     * Remove remote-mode checks in hupok() for K95G only (why?):
       ckuus3.c.
     * Add help text for new K95-only TYPE /GUI switches: ckuus2.c.
     * TYPE /GUI parsing, ...: ckuusr.c.
     * TYPE /GUI action, dotype(): ckuus6.c
     * Change Jeff's affiliation: most modules.

   Corrected the check in the linux target to see if /usr/include/crypt.h
   exists, and if so to define HAVE_CRYPT_H, which is used in ckcdeb.h to
   #include <crypt.h> to get the prototype for crypt() and prevent bogus
   conversions on its return type on 64-bit platforms (the previous test
   wasn't quite right and the resulting symbol wasn't spelled right).
   makefile, 12 Mar 2004.

   Miscellaneous cleanups: ckuusx.c, ckcnet.c, ckufio.c, 11 Mar 2004.

   Changed MANDIR to default to $(manroot)/man/man1, and manroot to
   default to $(prefix). More adding of CC=$(CC) clauses:
   {Free,Net,Open}BSD, 4.4BSD. makefile, 11 Mar 2004. Added "LIBS=-lcrypt"
   to bsd44 targets since nowadays crypt is almost always unbundled from
   libc. Also added explanatory notes. makefile, 11 Mar 2004.

   Added FreeBSD 4.9 and 5.1 targets (only the herald is affected).
   makefile, ckuver.h, 11 Mar 2004.

   Added error checking to kermit:// URL macros, so they don't plow ahead
   after the connection is closed. ckcmai.c, 11 Mar 2004.

   Added CC=$(CC) CC2=$(CC2) to many (but not all) makefile targets that
   reference other makefile targets. On some platforms (notably AIX,
   Solaris, SunOS) there are specific targets for different compilers, so
   I skipped those. makefile, 10 Mar 2004.

   Minor syntax and typo fixes (mostly prototypes): ckcdeb.h, ckcfns.c,
   ckclib.c, ckufio.c, ckuusr.h, ckuusx.c, 10 Mar 2004. (I still have a
   few more to do.)

   From Nelson Beebe: In the Kermit makefile in the install target
   commands, line 981 reads:

        cp $(BINARY) $(DESTDIR)$(BINDIR)/kermit || exit 1;\

   Could you please add this line before it:

        rm -f $(DESTDIR)$(BINDIR)/kermit;\

   Some sites (mine included) keep multiple versions of software around,
   with hard links between $(prefix)/progname and
   $(prefix)/progname-x.y.z. Failure to remove the $(prefix)/progname at
   "make install" time then replaces the old $(prefix)/progname-x.y.z with
   the new one, destroying an old version that the site wanted to be
   preserved. makefile, 10 Mar 2004.

   Replaced hardwired references to /usr/local in makefile with $(prefix)
   (which defaults to /usr/local, but can be overridden on the command
   line), suggested by Nelson Beebe for use with Configure. 10 Mar 2004.

   Added ckuker.nr to x.sh (ckdaily upload) and updated ckuker.nr with
   current version number and dates. 10 Mar 2004.

   IKSD (kermit://) command-line URLs did not work right if the client had
   already preauthenticated with Kerberos or somesuch because they tried
   to log in again with REMOTE LOGIN. The macros constructed in doxarg()
   needed to check \v(authstate) before attempting REMOTE LOGIN. ckcmai.c,
   10 Mar 2004.

   Fixed compiler warning in doxarg() caused by typo (NULL instead of NUL)
   in the 5 March doxarg() edit. ckuusy.c, 9 Mar 2004.

   Trial Beta builds:
     * HP-UX B.11.11 PA-RISC
     * HP-UX B.11.23 IA64
     * Tru64 4.0G Alpha
     * Tru64 5.1B Alpha
     * Debian 3.0 i386
     * Red Hat ES 2.1 i386
     * Slackware 9.1 i386
     * VMS 7.3-1 Alpha + UCX 5.3
     * VMS 7.3-1 Alpha no TCP/IP
     * VMS 7.3 Alpha MultiNet 4.3 A-X
     * SCO UnixWare 7.1.4 i386
     * SCO OSR5.0.7 i386
     * Solaris 9 Sparc

   The logic in dourl() about which macro to construct (login and connect,
   login and get directory listing, or login and fetch a file) was a bit
   off, so all three cases were not handled. ckcmai.c, 5 Mar 2004.

   Problem: when accessing IKSD via a kermit:// or iksd:// URL, and a user
   ID is given but no password, doxarg() set the password to "" instead of
   leaving it NULL, but all the tests in dourl() are for NULL. Fixed in
   doxarg(): ckuusy.c, 5 Mar 2004.

   Fixed zrename() syslogging -- it had success and failure reversed.
   Beta.02: ckufio.c, 4 Mar 2004.

   Designation changed from Dev.00 to Beta.01. ckcmai.c, 2 Mar 2004.

   Updated Jeff's affiliation in VERSION command text. ckuusr.c, 2 Mar
   2004.

   New ckuath.c, ck_ssl.c from Jeff. 2 Mar 2004.

   Fixed some confusion in creating IKSD database file and temp-file
   names. I was calling zfnqfp() without remembering that the path member
   of the returned struct included the filename, so to get just the
   directory name, I needed to strip the filename from the right.
   ckuusy.c, 2 Mar 2004.

   Checked a complaint that "LOCAL &a" did not make array \&a[] local.
   Indeed it did not, and can not. You have to use the full syntax in the
   LOCAL command, "LOCAL \&a[]", or else it doesn't know it's not a macro
   named &a. 7 Feb 2004.

   Added KFLAGS to sco32v507 targets to make PTY and SSH commands work.
   The same flags could probably also be added to earlier OSR5 targets but
   they have not been tested there. makefile, 7 Feb 2004.

   From Alex Lewin: makefile target and #ifdef for Mac OS X 10.3
   (Panther): makefile, ckcnet.c, 7 Feb 2004.

   Fix from Jeff: Connections to a TLS-aware protocol which require a
   reconnect upon certificate verification failure could not reconnect if
   the connection was initiated from the command line or via a URL.
   ckctel.c ckcmai.c ckuusr.c ckuus7.c ckuusy.c, 20 Jan 2004.

   Fixed a glitch in K95 "help set port". ckuus2.c, 20 Jan 2004.

   Changed version to 8.0.211 so scripts can test for recently added
   features. ckcmai.c, 15 Jan 2004.

   Fixed SWITCH to work even when SET COMMAND DOUBLEQUOTE OFF (from Mark
   Sapiro). ckuus5.c, 15 Jan 2004.

   Catch another copyright date. ckuus5.c, 14 Jan 2004.

   Dat Nguyen noticed that (setq u 'p') followed by (u) dumped core. This
   was caused by an over-clever optimization that skipped mallocs for
   short literals, but then went on later to try to free one that hadn't
   been malloc'd. Fixed in dosexp(): ckuus3.c, 14 Jan 2004.

   Added untabify() routine to ckclib.[ch], 13 Jan 2004. Added FREAD /TRIM
   and /UNTABIFY. ckuus[27].c, 13 Jan 2004. Added \funtabify(). ckuusr.h,
   ckuus[24].c, 13 Jan 2004.

   Unix zchki() would fail on /dev/tty, which is unreasonable. This
   prevented FOPEN /READ from reading from the terminal. zchki() already
   allowed for /dev/null, so I added /dev/tty to the list of specials.
   Ditto for FOPEN /WRITE and zchko(). ckufio.c 13 Jan 2004.

   declare \&a[999999999999999] would dump core on some platforms. atoi()
   or whatever would truncate the dimension to maxint. When we add 1 to
   the result, we get a negative number, which is used as an index, loop
   test, etc. Fixed both dodcl() and dclarray() to check for (n+1 < 0).
   ckuus[r5].c, 12 Jan 2004.

   While setting up IKSD, Ian Beckwith noticed that including the
   --initfile: option caused Kermit to start parsing its own Copyright
   string as if it were the command line, and eventually crash. I couldn't
   reproduce on Solaris / Sparc but I could in Linux / i386 (what Ian is
   using) -- a change from Jeff on 28 Apr 2003 set the command-line arg
   pointer to a literal empty string in prescan() about line 1740 of of
   ckuus4.c; the pointer is incremented next time thru the loop, resulting
   in random memory being referenced. Fixed by setting the pointer to NULL
   instead of "". ckuus4.c, 12 Jan 2004.

   Updated \verify() and \fcode() help text. ckuus2.c, 12 Jan 2004.

   \fcode(xxx) returned an empty string if its argument string was empty.
   This makes it unsafe to use in arithmetic or boolean expressions.
   Changed it to return 0 if its argument was missing, null, or empty.
   ckuus4.c, 12 Jan 2004.

   undef \%a, \fverify(abc,\%a) returns 0, which makes it look as if \%a
   is a string composed of a's, b's, and/or c's, when in fact it contains
   nothing. Changed \fverify() to return -1 in this case. ckuus4.c, 12 Jan
   2004.

   Added SET INPUT SCALE-FACTOR <float>. This scales all INPUT timeouts by
   the given factor, allowing time-sensitive scripts to be adjusted to
   changing conditions such as congested networks or different-speed
   modems without having to change each INPUT-class command. This affects
   only those timeouts that are given in seconds, not as wall-clock times.
   Although the scale factor can have a fractional part, the INPUT timeout
   is still an integer. Added this to SHOW INPUT, and added a \v(inscale)
   variable for it. ckuusr.h, ckuus[r257].c, 7 Jan 2004.

   Added INPUT /NOMATCH, allowing INPUT to be used for a fixed amount of
   time without attempting to match any text or patterns, so it's no
   longer necessary to "input 600 STRING_THAT_WILL_NEVER_COME". If
   /NOMATCH is included, INPUT succeeds if the timeout expires, with
   \v(instatus) = 1 (meaning "timed out"); fails upon interruption or i/o
   error. ckuusr.h, ckuus[r24].c, 7 Jan 2004.

   From Ian Beckwith <ian@nessie.mcc.ac.uk> (Debianization), 7 Jan 2004:
     * Search dir/ckermit for docs, as well as dir/kermit in cmdini():
       ckuus5.c.
     * New linux+krb5+krb4+openssl+shadow+pam target (kitchen sink minus
       SRP, which Debian does not distribute): makefile.
     * (?) Mangles the DESTDIR support in makefile to install into a
       staging area: makefile (I didn't take this one yet).

   Updated copyright notices for 2004, all modules. 7 Jan 2004.

   From Jeff: 7 Jan 2004:
     * At one point Frank started to add a timer parameter to the uq_txt()
       function but he only did it for the non-ANSI compilers. I added it
       for the ANSI compilers, fixed the prototypes and provided a default
       value easily changed DEFAULT_UQ_TIMEOUT: ckcker.h, ckuus[36].c,
       ck_ssl.c, ckcftp.c, ckuath.c.
     * Fixed SET TERMINAL DEBUG ON (typo in variable name): ckuus7.c.
     * Fixed BEEP INFORMATION; previously it made no sound, now uses
       MB_ICONQUESTION. ckuusx.c.

   From Jeff, 30 Nov 2003:
     * Fix SEND /MOVE-TO: ckuusr.c.
     * Fix K95 SET TITLE to allow quotes/braces around text: ckuus7.c.
     * Improved "set term autodownload ?" response: ckuus5.c.
     * Fix SHOW FEATURES to specify the protocol for encryption: ckuus5.c
     * Make {SEND, RECEIVE} {MOVE-TO, RENAME-TO} work for XYZMODEM (K95
       only).

   A couple fixes to the solaris9g+krb5+krb4+openssl+shadow+pam+zlib
   target from Jeff. Added a solaris9g+openssl+shadow+pam+zlib target.
   makefile, 21 Nov 2003.

   Another new makefile from PeterE with improved and integrated HP-UX
   targets. 12 Nov 2003.

   From PeterE, 10 Nov 2003:
     * Improved HP-UX 10/11 makefile targets for OpenSSL.
     * #ifdef fix for OpenSSL on HP-UX: ck_ssl.c.

   From Jeff, 6 Nov 2003:
     * #ifdef adjustments: ckcftp.c, ckcdeb.h
     * Fix spurious consumption of first byte(s) on Telnet connection:
       ckctel.c
     * Another HP PJL test for scanfile: ckuusx.c.
     * K95: Recognize DG4xx protected fields in DG2xx emulation: ckuus7.c.
     * Add SSLeay version display to SHOW AUTH command: ckuus7.c
     * Improved SET MOUSE CLEAR help text: ckuus2.c.
     * Improved Kverbs help text: ckuus2.c (+ new IBM-3151 Kverbs).
     * Some changes to ck_ssl.c, ckuath.c.

   Added target for HP-UX 10/11 + OpenSSL built with gcc, from Chris
   Cheney. Makefile, 12 Oct 2003.

   Change SET DIAL INTERVAL to be like SET DIAL RETRIES. ckuus[34].c, 6
   Oct 2003.

   From Jeff: add /DEFAULT: for popups. ckuus6.c. 6 Oct 2003.

   Added /DEFAULT: to ASK-class commands (ASK, ASKQ, GETOK):
     * For popups: no way to send defaults to popup_readtext() or
       popup_readpass().
     * For GUI ASK[Q], pass default to gui_txt_dialog().
     * For GUI GETOK, convert "yes" "ok" or "no" default to number for
       uq_ok().
     * For Text GETOK, add default to cmkey().
     * For Text ASK[Q], add default to cmtxt().
     * For GETC, GETKEY, and READ: no changes.

   GETOK, ASK, and ASKQ with /TIMEOUT: no longer fail when the timer goes
   off if a /DEFAULT was supplied. The GUI functions (uq_blah) don't seem
   to support timeouts. Only the text version has been tested.
   ckuus[26].c, 4 Oct 2003.

   Allow DIAL RETRIES to be any positive number, and catch negative ones.
   Also added code to check for atoi() errors (e.g. truncation). At least
   on some platforms (e.g. Solaris) atoi() is supposed to set errno, but
   it doesn't. ckuus3.c, ckucmd.c, 4 Oct 2003.

   From Jeff: Replace the compile time ALLOW_KRB_3DES_ENCRYPT with a
   run-time command SET TELNET BUG AUTH-KRB5-DES which defaults to ON:
   ckctel.[ch], ckuus[234].c, ck_crp.c, ckuath.c. 4 Oct 2003.

   Marco Bernardi noticed that IF DIRECTORY could produce a false positive
   if the argument directory had previously been referenced but then
   removed. This is because of the clever isdir() cache that was added to
   speed up recursion through big directory trees. Changed IF DIRECTORY to
   make a second check (definitive but more expensive) if isdir()
   succeeds, and changed the directory-deleting routine, ckmkdir(), to
   flush the directory cache (UNIX only -- this also should be done in K95
   but it's not critical). This was done by adding a routine,
   clrdircache() to ckufio.c, which sets prevstat to -1 and prevpath[0] to
   NUL. ckcfn3.c, ckuus6.c, ckufio.c, 18 Sep 2003.

   Marco reported the second fix still didn't work for him (even though it
   did for me). Rather than try to figure out why, I concluded that the
   directory cache is just not safe: a directory found a second ago might
   have been deleted or renamed not only by Kermit but by some other
   process. Why did I add this in the first place? The log says:

  Some debug logs showed that isdir() is often called twice in a row on the
  same file.  Rather than try to sort out clients, I added a 1-element cache
  to Unix isdir().  ckufio.c, 24 Apr 2000.

   Experimentation with DIR and DIR /RECURSIVE does not show this
   happening at all. So I #ifdef'd out the directory cache (see #ifdef
   ISDIRCACHE in ckufio.c; ISDIRCACHE is not defined) and backed off the
   previous changes: ckufio.c, ckcfn3.c, ckuus6.c, 18 Sep 2003.

   From Jeff: Corrected code in ckcnet.c to ensure that Reverse DNS
   Lookups are not performed if tcp_rdns is OFF. Fixed ck_krb5_getrealm()
   to actually return the realm of the credentials cache and not the
   default realm specified in the krb5.conf file. Previously
   krb5_cc_get_principal() was not being called. Fixed
   ck_krb5_is_tgt_valid() to test the TGT in the current ccache and not
   the TGT constructed from the default realm. ckcnet.c, ckuath.c, 14 Sep
   2003.

   "ftp mget a b c" succeeded if one or more of the files did not exist,
   even with "set ftp error-action proceed". This is because the server's
   NLST file list does not include any files that don't exist, so the
   client never even tries to get them. Fortunately, the way the code is
   structured, this one was easy to fix. ckcftp.c, 14 Sep 2003.

   From Jeff: Added - #define ALLOW_KRB_3DES_ENCRYPT. When this symbol is
   defined at compilation Kermit will allow non-DES session keys to be
   used during Telnet Auth. These session keys can then be used for Telnet
   Encrypt. The reason this is not compiled on by default is that the MIT
   Kerberos Telnet does not follow the RFC for constructing keys for
   ENCRYPT DES when the keys are longer than 8 bytes in length. ckuath.c,
   ckuus5.c, 4 Sep 2003.

   Added comments about OpenSSL 0.9.7 to all linux+openssl targets.
   makefile, 4 Sep 2003.

   Ditto (but within #ifndef NOPCLSCAN) for PCL (<ESC>E) and PJL (<ESC>%)
   files, but no binpatterns (note: ".PCL" is the extension for TOPS-20
   EXEC scripts). ckuusx.c, 4 Sep 2003.

   Ditto for PostScript files, but conservatively. Signature at beginning
   of file must begin with "%!PS-Ado". If it's just "%!" (or something
   nonstandard like "%%Creator: Windows PSCRIPT") we do a regular scan.
   Also added "*.ps" to all binary filename patterns. ckuusx.c, 4 Sep
   2003.

   Scanfile misidentified a big PDF file as text because the first 800K of
   it *was* text (most other PDF files were correctly tagged as binary).
   Fixed by adding a check for the PDF signature at the beginning of the
   file. scanfile(): ckuusx.c, 25 Aug 2003.

   From Jeff: "Reorganizing code to enable building with different subsets
   of options; a few typos corrected as well." ckcdeb.h, ckuver.h (for
   RH9), ckcnet.c, ckuus7.c, ckuus3.c: 24 Aug 2003.

   GREP /NOLIST and /COUNT did too much magic, with some undesirable
   fallout: "GREP /NOLIST /COUNT:x args" printed "file:count" for each
   file. "GREP /COUNT:x /NOLIST args" did not print "file:count", but
   neither did it set the count variable. Removed the magic. Also one of
   the GREP switches, /LINENUMBERS, was out of order. Fixed in ckuus6.c,
   20 Aug 2003.

   From Jeff: Fix for typo in urlparse() (svc/hos): ckuusy.c, 18 Aug 2003.

   From Jeff: Redhat9 makefile targets (needed for for OpenSSL 0.9.7):
   makefile, 19 Aug 2003.

   Fixed ACCESS macro definition to account for the fact that FIND is now
   a built-in command. ckermit.ini, 30 Jul 2003.

   Mats Peterson noticed that a very small Latin-1 file would be
   incorrectly identified as UCS-2 by scanfile(). Fixed in ckuusx.c, 29
   Jul 2003.

   From Jeff: updated ckuat2.h and ckuath.c, 29 Jul 2003.

   From Jeff: Fix problems mixing SSL and SRP without Kerberos. Plus a few
   minor #define comment changes and a reshuffling of #defines in ckcdeb.h
   to allow me to build on X86 Windows without Kerberos. ckcdeb.h,
   ck_crp.c, ckuath.c, 10 Jul 2003.

   Add -DUSE_MEMCPY to Motorola SV/68 targets because of shuffled
   #includes in ckcftp.c. 8 Jul 2003.

   Remove duplicate #includes for <sys/stat.h>, <errno.h>, and <ctype.h>
   from ckcftp.c. 6 Jul 2003.

   From Arthur Marsh: solaris2xg+openssl+zlib+srp+pam+shadow and the
   corresponding Solaris 7 target. makefile, 6 Jul 2003.

   Fixed ckvfio.c to #include <ckuusr.h> (instead of <ckucmd.h>) to pick
   up missing prototypes. 6 Jul 2003.

   Tried to build on our last VMS system but it seems to be dead. Looks
   like a head crash (makes really loud noises, boot says DKA0 not
   recognized) (fooey, I just paid good money to renew the VMS license).
   Tried building at another site with:

  Process Software MultiNet V4.3 Rev A-X,
  Compaq AlphaServer ES40, OpenVMS AXP V7.3
  Compaq C V6.4-008 on OpenVMS Alpha V7.3

   Had to make a few corrections to ckvker.com. But still, compilation of
   ckcnet.c bombs, indicating that the SELECT definition somehow got lost
   somewhere since the 209 release (i.e. no SELECT type is defined so it
   falls thru to "SELECT is required for this code"). But I don't see
   anything in ckcdeb.h or ckcnet.[ch] that would explain this. Not
   ckvker.com either (putting the old one back gives the same result). OK,
   I give up, maybe it's just that I haven't tried building it on MultiNet
   recently. What about UCX? Aha, builds fine there except for warnings
   about mlook, dodo, and parser in ckvfio.c (because of ON_CD) -- I
   suppose I have #include <ckucmd.h>... (done) Anyhow it builds OK and
   the HTTP code is active and almost works (HTTP OPEN works; HTTP GET
   seems to succeed but creates an empty file every time). Tried building
   under MultiNet at another installation; same bad result.

   OK so why won't it build for MultiNet? Comparing ckcnet.c with the 209
   version, not a single #ifdef or #include is changed. Tried building
   with p3="NOHTTP" -- builds OK, aha. Where's the problem? Not
   ckcnet.h... Not ckcdeb.h... OK I give up, will revisit this next time I
   get time to do anything with the code.

   Later Jeff said "Martin did not implement VMS networking for the HTTP
   code. All he did was activate the #define HTTP which happens to work
   because his connections are using SSL/TLS connections. http_inc(),
   http_tol(), etc have no support for VMS networking regardless of
   whether it is UCX or MULTINET. The vast majority of HTTP connections
   are not secured by SSL/TLS. It makes no sense to support HTTP on VMS
   until someone is willing to either do the work or pay have the work
   done to implement VMS networking in that code base." So the fix is to
   not enable HTTP for VMS after all. Removed the CKHTTP definition for
   VMS from ckcdeb.h, 6 Jul 2003.

   From Jeff: Fix SET DIALER BACKSPACE so it can override a previous SET
   KEY (e.g. from INI file): ckuus7.c. Some SSL/TLS updates: ck_ssl.c.
   HTTP support for VMS and other VMS improvements (e.g. a way to not have
   to hardwire the C-Kermit version number into the build script) from
   Martin Vorlaender: ckcnet.h, ckuus[r3].c, ckcdeb.h, ckvtio.c, ckcnet.c,
   ckvker.com. Built on Solaris (gcc/ansi) and SunOS (cc/k&r). The new VMS
   script tests the VMS version and includes HTTP support only for VMS 6.2
   or later. 2 Jul 2003.

   From Jeff: fixes to HTTP /AGENT: and /USER: switch action: ckcnet.c
   ckuus3.c ck_crp.c ckcftp.c ckuus2.c ckuusy.c ckuusr.c ckcnet.h, 21 Jun
   2003.

   From Jeff: Stuff for Kerberos 524: ckcdeb.h. Fixes for FTP; "FTP ASCII
   send data did not properly compute the end of line translations. On
   Unix (and similar platforms) the end of line was correct for no
   character sets but incorrect when character sets were specified. On
   Windows/OS2, the end of line was correct when character sets were
   specified and incorrect when they were not. On MAC, both were broken.
   Also, FTP Send Byte counts were incorrect when character sets were
   specified." ckcftp.c. 17 Jun 2003.

   From Jeff: FTP ASCII send data to host when FTP /SSL was in use was
   broken. ftp_dpl is set to Clear when FTP /SSL is in use. This was
   causing the data to be written to the socket with send() instead of the
   OpenSSL routines. ckcftp.c, ckuath.c, 21 May 2003.

   Added support for Red Hat <baudboy.h> and /usr/sbin/lockdev. Supposedly
   this allows Kermit to be installed without setuid or setgid bits and
   still be able to lock and use the serial device. Compiles and starts,
   but not tested. ckcdeb.h, makefile, ckutio.c, ckuus5.c, 16 May 2003.

   Fixed an oversight that goes back 15 years. While \{123} is allowed for
   decimal codes, \x{12} and \o{123} were never handled. ckucmd.c, 11 May
   2003.

   CONTINUE should not affect SUCCESS/FAILURE status. ckuusr.c, 11 May
   2003.

   Vace discovered that FTP MGET /EXCEPT:{... (with an unterminated
   /EXCEPT list) could crash Kermit. Fixed in ckcftp.c, 11 May 2003.

   The doublequote-parsing fixes from March and April broke the SWITCH
   statement, which is implemented by internally defining, then executing,
   a macro. If I drop back to the old dumb handling of doublequotes,
   everything is fixed except the problem of March 17th. But can we really
   expect getncm() to pre-guess what the parser is going to do? getncm()'s
   only job is to find command boundaries, which are represented by
   commas. Commas, however, is needed IN commands too. We take a comma
   literally if it is quoted with \, or is inside a matched pair of
   braces, parens, or doublequotes. It is not unreasonable to require a
   doublequote in a macro definition to be prefixed by \ when it is to be
   taken literally. The proper response to Jason Heskett's complaint of
   March 17th should have been to leave the code alone and recommand an
   appropriate form of quoting:

  def TEST {
      .foo = {X\"}
      sho mac foo
  }

   And this is what I have done. Another reason for sticking with the old
   method is that it's explainable. The "improved" method, even if it
   worked, would be be impossible to explain. Btw, in testing this I
   noticed that the switch-test script made 8.0.201 dump core. Today's
   version is fine. The problem with quoted strings inside of IF {...}
   clauses and FOR and WHILE loops is fixed too. Perhaps "unbroken" would
   be a better word. ckuus5.c, 11 May 2003.

   From Jeff, 11 May 2003:
     * Add support for SSH Keepalive to relevant SET command (K95):
       ckuus3.c
     * Reduce max overlapped i/o requests from 30 to 7 (K95): ckuus7.c
     * Don't call sysinit() in fatal(): ckuusx.c.
     * Some new conditionalizations for SSL module: ck_ssl.c

   From Jeff, Sat May 3 14:15:23 2003:
     * Pick up the right isascii definition for K95: ckctel.c
     * malloc... ckuath.c (new safe malloc routines for K95)
     * Add author listing: ckuus5.c
     * SSH Heartbeat support (K95 only): ckuus[23].c
     * Prescan --height and --width to avoid window resizing at startup:
       ckuusy.c
     * Add checks for fatal() or doexit() called from sysinit(): ckuusx.c
     * Move some K95-specific definitions to ckoker.h: ckcdeb.h
     * Add support for ON_CD macro in zchdir(): ckufio.c
     * Add a command to let FTP client authenticate with SSLv2: ckcftp.c
     * Fix parsing of FTP file facts like "UNIX.mode": ckcftp.c

   ON_CD will need some explaining (to be done). It's implemented for
   Unix, VMS, WIndows, and OS/2.

   The FTP file facts fix came from first exposure to the new OpenBSD FTP
   server: [87]ftp://ftp7.usa.openbsd.org/pub/os/OpenBSD/3.3/i386/ The
   period in "UNIX.mode" caused an erroneous word break, adding junk to
   the filename.

   About the malloc changes, Jeff says "K95 is not behaving well in low
   memory environments. I'm not sure that C-Kermit does much better. The
   program does not crash but it certainly does not behave the way the
   user expects it to. I'm beginning to think that any malloc() error
   should be treated as fatal."

   Not visible in these changes because it's in K95-specific modules: Jeff
   made SET ATTRIBUTES OFF and SET ATTRIBUTES DATE OFF apply to XYZMODEM
   transfers.

   From Jeff, 29 Apr 2003:
     * Corrected target for HP-UX 11.00 + OpenSSL: makefile,
     * Do not allow WILL AUTH before WONT START_TLS: ckctel.h ckctel.c
     * Add hooks for SFTP and SET/SHOW SFTP: ckcdeb.h ckuusr.h ckuusr.c
       ckuus3.c
     * Add SKERMIT ckuusr.h ckuusr.c
     * Add ADM-5 terminal emulation: ckuus7.c, ckuus5.c
     * Uncomment and update HELP SET SSH V2 AUTO-REKEY: ckuus2.c
     * Enable IF TERMINAL-MACRO and IF STARTED-FROM-DIALER for C-Kermit:
       ckuus6.c
     * Fix conflicting NOSCROLL keyword definition: ckuusr.h
     * Set ttname when I_AM_SSH: ckuusy.c
     * Add extended arg parsing for SSH, Rlogin, Telnet: ckuusy.c,
       ckuus4.c
     * Security updates: ckuath.c, ck_ssl.c
     * Change K95 version number to 2.2.0: ckcmai.c
     * Save K95 term i/o state before executing keyboard macro: ckuus4.c
     * Add tests for SSH Subsystem active during INPUT/OUTPUT/CONNECT:
       ckuus[45].c
     * Enable K95 SET SSH V2 AUTO-REKEY: ckuus3.c

   SFTP and SET SFTP subcommands are implemented up to the case
   statements.

   Files of mine that Jeff hadn't picked up:
  ckuver.h ckcftp.c ckutio.c ckuusx.c (just minor changes for last build-all)

   On 4 Jan 2003, SET RECEIVE MOVE-TO was changed to convert its argument
   to an absolute path, which made it impossible to specify a relative
   path, then move to different directories and have it apply relatively
   to each directory. Changed this as follows:

     * Parser uses cmtxt() rather than cmdir() so it won't fail at parse
       time.
     * If path is absolute, we fail at parse time if directory doesn't
       exist.
     * In reof() we run the path through xxstring (again, in case deferred
       evaluation of variables is desired) and then, if not null, use it.
     * If the directory doesn't exist, rename() fails and reof() returns
       -4, resulting in a protocol error (this is not a change). We do NOT
       create the directory on the fly.

   I also fixed SET SEND/RECEIVE RENAME-TO to parse with cmtxt() rather
   than cmdir(), since it's parsing a text template, not a directory name,
   e.g. "set receive rename-to file-\v(time)-v(date)-\v(pid)". This was
   totally broken, since when I don't know. We don't call xxstring() in
   this parse, so evaluation is always deferred -- I'd better not change
   this. ckuus7.c, ckcfns.c, 1 May 2003.

   From Mark Sapiro, a fix for the March 17th doublequote fix, getncm():
   ckuus5.c, 4 Apr 2003.

8.0.209

   Changed since 208: makefile ckuver.h ckcmai.c ckclib.c ckcftp.c
   ckucmd.c ckuus*.c ckutio.c.

   Added a target for SCO OSR5.0.7. makefile, ckuver.h, 30 Mar 2003.

   OK that gets us past ckcmai.c... Then in ckutio.c I had to add a new
   #ifdef around the LFDEVNO setting, because the Cray didn't have
   mkdev.h. Could not find a Cray-specific manifest symbol, so I made a
   new makefile target (cray9) that sets this symbol. Having done this I
   have no idea what kind of lockfile would be created, but I also doubt
   if anybody dials out from a Cray. The binary should run a C90, J90, or
   Y-MP. makefile, 26 Mar 2003.

   Tried building C-Kermit on a Cray Y-MP with UNICOS 9.0. "int suspend",
   declared in ckcmai.c and used in many modules, conflicts with:

  unistd.h:extern int suspend __((int _Category, int _Id));

   The "=Dsuspend=xsuspend" trick doesn't work for this; there is no way
   around the conflict other than to rename the variable: ckcmai.c,
   ckutio.c, ckuus[35xy].c. 26 Mar 2003. VMS and K95 not affected.

   A fix from Jeff SSL/TLS FTP data decoding. ckcftp.c, 18 Mar 2003.

   There are only certain cases where it makes sense to treat doublequotes
   as significant:

     * An open quote must be at the beginning or preceded by a space.
     * A close quote is only at the end or else followed by a space.

   This too was fixed in getncm(): ckuus5.c, 17 Mar 2003.

   Jason Heskett found another bug: if you define a macro FOO inside the
   definition of another macro BAR, and FOO's definition includes an odd
   number of doublequotes (such as 1), FOO's definition absorbs the rest
   of BAR's definition. Example:

  def TEST {
    .foo = {X"}
    sho mac foo
  }
  do test
  sho mac foo

   Results in:

  foo = {X"}, sho mac foo

   Diagnosis: the TEST definition becomes:

  def TEST .foo = {X"}, sho mac foo

   and the macro reader is erroneously treating the doublequote as an open
   quote, and then automatically closes the quote at the end of the
   definition. The error is that a doublequote should be significant only
   at the beginning of a field. But the macro reader isn't a command
   parser; it doesn't know what a field is -- it's just looking for commas
   and skipping over quoted ones. First we have to fix an oversight: SET
   COMMAND DOUBLEQUOTING OFF should have worked here, but it wasn't tested
   in this case. Fixed in getncm(): ckuus5.c, 17 Mar 2003.

   Picked up a new ckuath.c from Jeff, not sure what the changes are. 16
   Mar 2003.

   Did a few regular and secure builds to make sure I didn't wreck
   anything. Changed version number to 209 (final). ckcmai.c, 16 Mar 2003.

   Fixed FTP MODTIME to not print anything if QUIET ON. ckcftp.c, 16 Mar
   2003.

   SET CARRIER-WATCH <Esc> "auto matic" (spurious space in supplied
   keyword). Cosmetic only; it still worked. Fixed in setdcd(): ckuus3.c,
   16 Mar 2003.

   "directory a b c" listed too many files -- all files whose names END
   WITH a, b, or c, rather than the files whose names WERE a, b, or c.
   Diagnosis: The filespec is changed into a pattern: {a,b,c}, which is
   the correct form. It is passed to nzxpand(), which goes through the
   directory getting filenames and sending each one to ckmatch() with the
   given pattern. ckmatch() receives the correct pattern but then prepends
   a "*" -- that's not right. It's not just in filename matching either.
   The following succeeds when it shouldn't:

  if match xxxxc {{a,b,c}} <command>

   Changing ckmatch() to not prepend the "*" to each segment fixes the
   command above but breaks lots of others. Running through the "match"
   torture-test script shows the problem occurs only when the {a,b,c} list
   is the entire pattern, and not embedded within a larger pattern.
   Testing for this case fixed the problem. ckmatch(): ckclib.c, 16 Mar
   2003.

   \v(exedir) wasn't being set correctly (it included the program name as
   well as the directory). Fixed in getexedir(): ckuus4.c, 16 Mar 2003.

   Since it has multiple applications, changed the flag's name from
   minputactive to keepallchars. ckucmd.c, ckuus[r5].c, 16 Mar 2003.

   But there's still a problem:

  dcl \&a[] = "\4\5\13\10" "\6\7" "xxx"

   creates an array whose first member is "^D^E (one doublequote
   included). But if braces are used instead, there's no problem. Same
   deal as MINPUT: cmfld() breaks on CR or LF, thus the end quote is lost.
   If I set minputactive for DECLARE initializers too, that fixes it. Is
   there any reason not to do this? Can't think of any (famous last
   words)... ckuusr.c, 16 Mar 2003.

   MINPUT n \fjoin(&a) works OK if all the members of \&a[] are text
   strings, but if they are strings of control chars (as above), they
   don't get separated by the spaces. For example in:

  dcl \&a[] = "\4\5" "\6\7" xxx
  minput 10 \fjoin(&a)

   MINPUT gets two targets: "aaa" and "\4\5 \6\7 xxx". The bug was in the
   cksplit() call in the \fjoin() case of MINPUT: it needed to specify an
   include set consisting of all the control characters except NUL.
   ckuusr.c, 16 Mar 2003.

   While debugging the alphapage script, I found that the command "minput
   8 \6\13 \21\13 \13\27\4\13 \30\13" gets "?Not confirmed" in 8.0.208 and
   8.0.209, but not in 206 and earlier. This problem too was introduced on
   Feb 10th by changing MINPUT parsing from cmtxt() followed by cksplit()
   to cmfld() in a loop. cmfld() uses setatm() to return its result and of
   course setatm() breaks on \13. Changing setatm() not to do this would
   break everything else. But cmfld() has no arguments that let us tell it
   to do anything different in this case. Changing the API would be a
   disaster. The only solution is to add an "MINPUT ACTIVE" (minputactive)
   global variable that tells cmfld() to tell setatm() not to break on CR.
   Now MINPUT with braced targets containing CR and/or LF works in 209,
   206, and 201 (but not 208). ckucmd.c, ckuusr.c, ckuus5.c, 15 Mar 2003.

   Changed version number to 209 Dev.00. ckcmai.c, 14 Mar 2003.

   Fixed MINPUT to strip quotes or braces from around targets (this was
   broken on Feb 10th). Thanks to Jason Heskett for discovering and
   reporting this (killer) bug. ckuusr.c, 14 Mar 2003.

   From Jeff 13 Mar 2003:
     * Updated SSL module allows importation of tickets from host.
     * freebsd50+openssl target: makefile.
     * FTP PUT /PERMISSIONS error message for K95: ckcftp.c.

8.0.208

   C-Kermit 8.0.208 dated 14 March 2003 released on 10 March 2003.

   Rebuilt binaries for some of the more current Unix releases: AIX
   4.3.3-5.1, Solaris 7-9 , Red Hat 7.0-8.0, Slackware 8.1, Freebsd
   4.7-4.8, NetBSD 1.6, OpenBSD 3.2, Unixware 7.1.3, Open Unix 8,
   OSR5.0.6a, etc. A Unix binary with COPY umask fix shows a 6 Mar 2003
   date for "UNIX File support" in SHOW VERSIONS; a binary without the fix
   shows 24 Oct 2002.

   Added a debug call to dologend in hopes of catching overzealous Locus
   switching, which seems to happen only in K95. ckuus3.c, 7 Mar 2002.

   In the VMS version, changed:

while ((n--) && xx_inc(2) > -1) ;

   to:
while ((n--) && xx_inc(2) >= 0) ;

   to suppress the "...is being compared with a relational operator to a
   constant whose value is not greater than zero" warning. ckvtio.c, 7 Mar
   2002.

   In Unix, the zcopy() routine (used by the COPY command) reset the
   user's umask to 0 for the remainder of the Kermit process lifetime. The
   bug was in ckufio.c 8.0.194, 24 Oct 2002, and is fixed in ckufio.c
   8.0.195, 6 Mar 2003. Of course this happened after building 155
   C-Kermit 8.0.208 binaries. (But before officially releasing 8.0.208.)

   Added target/banner for Tru64 5.1B. makefile, ckuver.h, 5 Mar 2003.

   Jeff fixed a problem with the Xmodem-CRC checksum being crunched
   whenever there was a retransmission. 7 Mar 2003.

   Jeff fixed the K95 Dialer QUICK dialog to (a) allow templates, and (b)
   have a Save-As option. 3 Mar 2003.

   Fixed GETOK /GUI to evaluate its text argument. ckuus6.c, 3 Mar 2003.

   Changed Mac OS X entries to include -DUSE_STRERROR. makefile, 2 Mar
   2003.

   Added freebsd48 target for FreeBSD 4.8. makefile, 1 Mar 2003.

   At Jeff Mezei's suggestion, separate text and binary mode open
   sequences for VMS session log. ckvfio.c, 28 Feb 2003.

   From Jeff: Fix typo in my K95 zfnqfp() code from yesterday; fixes for
   handling UNCs uniformly, no matter which way their slashes are leaning.
   ckofio.c, 28 Feb 2003.

   Somehow an old copy of ckuath.c popped to replace the new one. Put the
   new one back. 28 Feb 2003.

   Added code to K95 zfnqfp() to tack on directory separator when
   returning a directory name. ckofio.c, 27 Feb 2003.

   Added code to ensure \v(download) ends in a directory separator in
   Unix, Windows, and OS/2. ckuus7.c, 27 Feb 2003.

   From Jeff: More #ifdef shuffling for nonsecure builds: ckuath.c,
   ck_ssl.c, 27 Feb 2003.

   Built on VMS. Needed to add a prototype for mxxlook*() to ckuusr.h;
   built OK otherwise. 26 Feb 2003.

   Ran the build-in-84-different-configurations script on Linux to make
   sure it still builds with all different combinations of feature
   selection options. All OK. 26 Feb 2003.

   Added #ifdefs to skip compilation of ckuath.c in nonsecure builds.
   Tested by building both secure and regular versions in Linux. ckuath.c,
   26 Feb 2003.

   In the Unix version, replace "extern int errno;" with "#include
   <errno.h>" if __GLIBC__ is defined, since glibc now defines a
   thread-specific errno. ckcdeb.h, 26 Feb 2003.

   From Jeff, 21 Feb 2003:
     * AIX53 and AIX52 symbols for ckcdeb.h, makefile.
     * New gcc targets for various AIX 4.x/5.x versions: makefile.
     * Copyright date updates: ck_crp.c, ck_ssl.c.
     * ENABLE/DISABLE QUERY broken because keyword table out of order:
       ckuusr.c.
     * Fixed the use of HTTP proxies for HTTP [RE]OPEN for Unix: ckcnet.c.

   Also for K95 only: Allow file transfer when K95 is invoked on the
   remote end of a connection to a Pragma Systems Terminal Server
   connection; automatically SET EXIT HANGUP OFF when invoked with open
   port handle ("k95 -l nnnn").

   "cd a*" failed even when "a*" matched only one directory. Fixed in
   cmifi(): ckucmd.c, 21 Feb 2003.

   Similar treatment for ck_ssl.c. 20 Feb 2003.

   Fixed #ifdefs in ck_crp.c to allow nonsecure builds on old platforms
   like System V/68 R3. 19 Feb 2003.

   Fixed COPY error messages, which did not come out in standard format
   when /LIST was not included. ckuus6.c, 17 Feb 2003.

   RENAME would sometimes not print an error message when it failed, e.g.
   in K95 when the destination file already existed. ckuus6.c, 17 Feb
   2003.

   The following FTP commands did not set FAILURE when they failed: RMDIR,
   CD, CDUP, Fixed in the corresponding doftpblah() routines. ckcftp.c, 16
   Feb 2003.

   Added \fcvtdate(xxx,3) to format its result in MDTM format
   (yyyymmddhhmmss, all numeric, no spaces or punctuation). Of course
   these numeric strings are too big to be 32-bit numbers and are useless
   for arithmetic, but they're useful for lexical comparison, etc.
   ckuus[24].c, 16 Feb 2003.

   Got rid of "krbmit" target from makefile. It's still there, but we
   don't use it any more. All secure targets now use "xermit", and produce
   a binary called wermit, just like the regular ones do (except the old
   ckucon.c ones). Non-secure targets, since they don't define any of the
   security symbols, wind up compiling and linking to (mostly) empty
   security modules. makefile, 15 Feb 2003.

   Ran my S-Expression torture test to make sure Sexps still worked. They
   do, except the bitwise & and | operators were broken, e.g. (& 7 2) and
   (| 1 2 4) get "Invalid operand" errors. Jeff's code had added an early
   failure return from the lookup loop when when a single-byte keyword
   matched a keyword that started with the same byte but was more than one
   byte long. So "&" would hit "&&" and fail instead of continuing its
   search (xlookup tables aren't sorted so there can be no early return).
   Fixed in xlookup(): ckucmd.c, 16 Feb 2003.

   In K95, "set key \1234 \27H" (any SET KEY command in which the first
   char of the definition was backslash, and the ONLY character after the
   backslash quantity was an uppercase letter, that letter would be
   lowercased). Diagnosis: xlookup() poking its argument (see notes from
   July 2000). Jeff sent a fix. ckucmd.c, 15 Feb 2003.

   Fixed FTP OPEN to allow the /USER switch to override SET FTP AUTOLOGIN
   OFF, just as /NOLOGIN overrides SET FTP AUTOLOGIN ON. ckcftp.c, 11 Feb
   2003.

   Macro replacement via \m() and \fdefinition() does not work as
   advertised (i.e. case sensitively) for associative array elements; e.g.
   \m(xxx<abc>) is treated the same as \m(xxx<ABC>), contrary to section
   7.10.10 of the C-Kermit 7.0 update notes, and to the fact that the two
   really do exist separately. Fixed by adding a static function
   isaarray(s) which succeeds if s is an associative array reference and
   fails otherwise, and then having \m() and \fdef() call mxxlook()
   (case-sensitive lookup) if isaarray(), otherwise (as before) mxlook()).
   ckuus4.c, 11 Feb 2003.

   It seems \fpattern() didn't work with MINPUT at all. There was no code
   to handle \fpattern() in the MINPUT parse loop, so it never worked. The
   code had to be totally rewritten to use cmfld() in a loop, rather than
   cmtxt() and then cksplit(). Furthermore, whenever any of the fields was
   an \fjoin(), this had to be split. ckuusr.c, 10 Feb 2003.

   INPUT n \fpattern(xxx) did not work for case-independent comparisons.
   Fixed in doinput(): ckuus4.c, 10 Feb 2003.

   HELP PATTERN text incorrectly identified commands and functions with
   floating and anchored patterns. The corrected lists are: Floating:
   GREP, TYPE /MATCH:, /EXCEPT: patterns, \farraylook(), Anchored: IF
   MATCH, file-matching wildcards, \fsearch(), \frsearch() ckuus2.c, 10
   Feb 2003.

   Don't dump core if FTP DEBUG is ON and FTP OPEN does not include a
   service. openftp(): ckcftp.c, 10 Feb 2003.

   From Jeff:
     * Avoid core dump when dereferencing tnc_get_signature(): ckuus4.c.
     * Bump version numbers to 8.0.208, 2.1.4: ckcmai.c.

   Added /NOLOGIN to FTP [OPEN]. ckcftp.c, 10 Feb 2003.

   New makefile target for HP-UX 11.xx with OpenSSL from Tapani Tarvainen.
   makefile, 31 Jan 2003.

   GREP did not pass its pattern through the expander, thus variables
   could not be used for patterns. This must have been an oversight -- I
   can't find anything in my notes about it. Fixed in dogrep(): ckuus6.c,
   24 Jan 2003.

   FTP MPUT f1 f2 f3... gets a parse error if any of the fn's do not match
   an existing file. This is bad for scripts. In doftpput(), cmfdb() looks
   for keywords (switches) or CMIFI. When it hits CMIFI, it exits from the
   initial parse loop and then does additional cmifi()s in a loop until
   done. The most obvious fix is to parse each field with
   cmfdb(CMIFI,CMFLD), i.e. fall back to CMFLD if CMIFI doesn't match
   anything. Then if CMFLD was used, we don't add the filespec to the
   list. This is a rather big change but it seems to work. No error
   messages or failures happen for non-matching fields, but an error
   message is printed (and the MPUT command fails) if none of the fields
   match any files. This fix got in too late for 2.1.3; workaround: use
   C-Shell like wildcard list (ftp mput "{*.abc,foo.*}"). ckcftp.c, 16 Jan
   2003.

   FTP USER, FTP ACCOUNT, plus the various prompts and switches for FTP
   username, password, and account all neglected to strip quotes, and in
   most cases quotes are necessary to specify a username that contains
   spaces. ckcftp.c, 15 Jan 2003.
   ---------------------------------
   **************************

   [[88]Go to top]
     __________________________________________________________________

   Updates to C-Kermit, versions 8.0, 9.0, and 10.0

References

   1. file:///index.html
   2. file:///
   3. http://www.panix.com/
   4. mailto:kermit@kermitproject.org
   5. file:///index.html
   6. file:///ckermit.html
   7. file:///ek.html
   8. file:///k95.html
   9. file:///ckscripts.html
  10. file:///current.html
  11. file:///whatsnew.html
  12. file:///about.html
  13. file:///archive.html
  14. file:///net/u/1/f/fdc/web/ckupdates.html#ck90302
  15. file:///net/u/1/f/fdc/web/ckdaily.html
  16. file:///net/u/1/f/fdc/web/ck10devbuilds.html
  17. file:///net/u/1/f/fdc/web/ckdaily.html
  18. mailto:fdc@columbia.edu
  19. file:///net/u/1/f/fdc/web/ck10devbuilds.html#table
  20. http://columbia.edu/~fdc/
  21. http://kermitproject.org/
  22. https://kermitproject.org/ftp/kermit/changelogs/
  23. https://kermitproject.org/ftp/kermit/ckermit/
  24. file:///net/u/1/f/fdc/web/html.html
  25. https://www.lysator.liu.se/c/bwk-tutor.html
  26. https://vmssoftware.com/products/ssl3/
  27. file:///net/u/1/f/fdc/web/ckupdates.html#ck10changes
  28. file:///net/u/1/f/fdc/web/ckupdates.html#ck10summary
  29. file:///net/u/1/f/fdc/web/ck10devbuilds.html#ck90305a07
  30. file:///net/u/1/f/fdc/web/ck90tables.html
  31. file:///net/u/1/f/fdc/web/ck90tables.html
  32. file:///net/u/1/f/fdc/web/k95.html
  33. file:///net/u/1/f/fdc/web/k95sourcecode.html
  34. https://kermitproject.org/ckdaily.html
  35. http://www.columbia.edu/cu/computinghistory/cudec20.html
  36. file:///net/u/1/f/fdc/web/ckupdates.html#sendpacketlen
  37. file:///net/u/1/f/fdc/web/ckermit80.html#x9
  38. https://www.kermitproject.org/ftp/kermit/scripts/easter2
  39. file:///net/u/1/f/fdc/web/ckupdates.html#alpha01
  40. https://www.kermitproject.org/ftp/kermit/ckermit/android.txt
  41. https://www.kermitproject.org/ftp/kermit/ckermit/android.mk
  42. file:///net/u/1/f/fdc/web/unix.html
  43. file:///net/u/1/f/fdc/web/html.html
  44. file:///net/u/1/f/fdc/web/change.html
  45. file:///net/u/1/f/fdc/web/ckupdates.html#pendingissues
  46. file:///net/u/1/f/fdc/web/ckupdates.html#dev23
  47. file:///net/u/1/f/fdc/web/locale.html
  48. file:///net/u/1/f/fdc/web/remind.html
  49. file:///net/u/1/f/fdc/web/ckermit80.html#x9
  50. file:///net/u/1/f/fdc/web/photogallery.html
  51. file:///net/u/1/f/fdc/web/photogallery.html
  52. https://kermitproject.org/ftp/kermit/scripts/renamejpgs
  53. file:///net/u/1/f/fdc/web/photogallery.html
  54. file:///net/u/1/f/fdc/web/remind.html
  55. file:///net/u/1/f/fdc/web/k95.html
  56. file:///net/u/1/f/fdc/web/k95sourcecode.html
  57. file:///net/u/1/f/fdc/web/ckupdates.html#dev24
  58. file:///net/u/1/f/fdc/web/ckupdates.html#ck90302
  59. file:///net/u/1/f/fdc/web/ckdaily.html#changelog
  60. file:///net/u/1/f/fdc/web/ckdaily.html
  61. https://kermitproject.org/ckermit80.html#x6.6
  62. file:///net/u/1/f/fdc/web/ck70.html
  63. file:///net/u/1/f/fdc/web/unix.html
  64. file:///net/u/1/f/fdc/web/iksd.html
  65. https://www.kermitproject.org/uiksd.html#x4.1
  66. file:///net/u/1/f/fdc/web/ascii.html
  67. file:///net/u/1/f/fdc/web/k95sourcecode.html
  68. file:///net/u/1/f/fdc/web/ckermit90.html#Vareval
  69. https://www.kermitproject.org/ck90305table.html
  70. file:///net/u/1/f/fdc/web/k95sourcecode.html
  71. file:///net/u/1/f/fdc/web/ckupdates.html#tgetent
  72. file:///net/u/1/f/fdc/web/photogallery.html
  73. https://wiki.debian.org/Multiarch/Implementation
  74. https://wiki.ubuntu.com/MultiarchSpec
  75. https://wiki.debian.org/Multiarch/HOWTO
  76. http://tim.sneddon.id.au/blog/Posts/C-Kermit_for_Android
  77. http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3767)
  78. http://www.columbia.edu/kermit/ftp/test/tar/x.zip
  79. http://www.mseclab.com/?p=180
  80. http://www.theregister.co.uk/2009/07/30/universal_ssl_certificate/
  81. http://kermit.columbia.edu/security.html
  82. http://zssh.sourceforge.net/
  83. http://freshmeat.net/articles/view/709/
  84. http://www.ece.utexas.edu/~luo/linux_lfs.html
  85. http://devrsrc1.external.hp.com/STK/partner/lg_files.pdf
  86. http://wwws.sun.com/software/whitepapers/wp-largefiles/largefiles.pdf
  87. ftp://ftp7.usa.openbsd.org/pub/os/OpenBSD/3.3/i386/
  88. file:///net/u/1/f/fdc/web/ckupdates.html#top
