xref: /csrg-svn/contrib/sc/VMS_NOTES (revision 45319)

From: ihnp4!gargoyle!oddjob!noao!arizona!naucse!jdc (John Campbell)
To: arizona!noao!oddjob!gargoyle!ihnp4!nsc!nscpdc!rgb
Subject: VMS SC

VMS USERS:

Bob Bond has been generous enough to give me free rein in adding what I
think is needed to make SC run on VMS.  Any problems with VMS should be
directed to me--they are not Bob's fault.

The VMS SC is "SIMPLE" for the most part, except that the arrow keys
(instead of hjkl) will move you around the cells.  The VMS version of SC
will not interact with the Bourne shell (obviously), which means that CRYPT
and EXTERNAL FUNCTIONS will not be available.

If you have a 'C' compiler and GNU Bison then you should be able to get
SC running on VMS by following the instructions below.

Step 1:  Get all the files

I've heard of a few sites that can unpack unix shar files directly on
VMS.  Most people, however, will need access to a unix machine to get
the original distribution unpacked.  At this time you should also build
experres.h and statres.h and perhaps run the man pages off if you need
to port the documentation. To build the two "missing" hearder files:
   sed <gram.y >experres.h -f eres.sed
   sed <gram.y >statres.h -f sres.sed

Step 2: Cut out BUILD.COM and GETOPT.C

At the end of this file are two other pieces: BUILD.COM and GETOPT.C.  After
you've moved everything to VMS, cut BUILD.COM and GETOPT.C out of here and
put them in the same directory as the rest of the SC distribution.

Step 3: Build it

Theoretically all you now need to do is @BUILD and SC (as well as PSC)
will be running on VMS.  If you have problems feel free to contact me
at ...!arizona!naucse!jdc  (or even call at 602-523-6259).

---------------------cut here for BUILD.COM--------------------------
$! VMS command file to build SC and PSC (requires bison)
$! SC:
$ bison -d gram.y
$ ren gram_tab.c gram.c
$ cc  /define=("SIMPLE","SIGVOID") sc.c
$ cc  /define=("SIMPLE","SIGVOID") gram.c
$ cc  /define=("SIMPLE","SIGVOID") lex.c
$ cc  /define=("SIMPLE","SIGVOID") interp
$ cc  /define=("SIMPLE","SIGVOID") cmds
$ cc  /define=("SIMPLE","SIGVOID") xmalloc
$ cc  /define=("SIMPLE","SIGVOID") range
$ cc  /define=("SIMPLE","SIGVOID") help
$ link sc.obj,lex.obj,gram.obj,interp.obj,cmds.obj,xmalloc.obj,-
       range.obj,help.obj,sys$library:vaxcrtl.olb/lib
$ !
$ ! Create VMS foreign command symbol to test SC
$ !
$ sc == "$" + f$logical("SYS$DISK") + f$directory() + "SC.EXE"
$!
$! Now PSC
$!
$ cc psc.c
$ cc getopt.c
$ link psc,getopt,sys$library:vaxcrtl.olb/lib
$ !
$ ! Create VMS foreign command symbol to test PSC (Note that
$ ! PSC reads SYS$INPUT and writes to SYS$OUTPUT, so use
$ ! DEFINE/USER to redirect.)
$ !
$ psc == "$" + f$logical("SYS$DISK") + f$directory() + "PSC.EXE"

---------------------cut here for GETOPT.C------------------------
/*
 * getopt - get option letter from argv
 *      This software is in the public domain
 *      Originally written by Henry Spencer at the U. of Toronto
 */

#include <stdio.h>

char    *optarg;        /* Global argument pointer. */
int     optind = 0;     /* Global argv index. */

static char     *scan = NULL;   /* Private scan pointer. */

/* extern char     *index();  obsolete, used strchr (JDC). */

int
getopt(argc, argv, optstring)
int argc;
char *argv[];
char *optstring;
{
        register char c;
        register char *place;

        optarg = NULL;

        if (scan == NULL || *scan == '\0') {
                if (optind == 0)
                        optind++;

                if (optind >= argc || argv[optind][0] != '-' || argv[optind][1] == '\0')
                        return(EOF);
                if (strcmp(argv[optind], "--")==0) {
                        optind++;
                        return(EOF);
                }

                scan = argv[optind]+1;
                optind++;
        }

        c = *scan++;
        place = strchr(optstring, c);

        if (place == NULL || c == ':') {
                fprintf(stderr, "%s: unknown option -%c\n", argv[0], c);
                return('?');
        }

        place++;
        if (*place == ':') {
                if (*scan != '\0') {
                        optarg = scan;
                        scan = NULL;
                } else {
                        optarg = argv[optind];
                        optind++;
                }
        }

        return(c);
}