home *** CD-ROM | disk | FTP | other *** search
- /*
- * rcsmerge operation
- */
- /*****************************************************************************
- * join 2 revisions with respect to a third
- *****************************************************************************
- */
-
- /* Copyright (C) 1982, 1988, 1989 Walter Tichy
- Copyright 1990, 1991, 1992 by Paul Eggert
- Distributed under license by the Free Software Foundation, Inc.
-
- This file is part of RCS.
-
- RCS is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- RCS is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with RCS; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- Report problems and direct all questions to:
-
- rcs-bugs@cs.purdue.edu
-
- */
-
-
-
- /* $Log: rcsmerge.c,v $
- * Revision 5.10 1992/07/28 16:12:44 eggert
- * Add -V.
- *
- * Revision 5.9 1992/01/24 18:44:19 eggert
- * lint -> RCS_lint
- *
- * Revision 5.8 1992/01/06 02:42:34 eggert
- * Update usage string.
- *
- * Revision 5.7 1991/11/20 17:58:09 eggert
- * Don't Iopen(f, "r+"); it's not portable.
- *
- * Revision 5.6 1991/08/19 03:13:55 eggert
- * Add -r$. Tune.
- *
- * Revision 5.5 1991/04/21 11:58:27 eggert
- * Add -x, RCSINIT, MS-DOS support.
- *
- * Revision 5.4 1991/02/25 07:12:43 eggert
- * Merging a revision to itself is no longer an error.
- *
- * Revision 5.3 1990/11/01 05:03:50 eggert
- * Remove unneeded setid check.
- *
- * Revision 5.2 1990/09/04 08:02:28 eggert
- * Check for I/O error when reading working file.
- *
- * Revision 5.1 1990/08/29 07:14:04 eggert
- * Add -q. Pass -L options to merge.
- *
- * Revision 5.0 1990/08/22 08:13:41 eggert
- * Propagate merge's exit status.
- * Remove compile-time limits; use malloc instead.
- * Make lock and temp files faster and safer. Ansify and Posixate. Add -V.
- * Don't use access(). Tune.
- *
- * Revision 4.5 89/05/01 15:13:16 narten
- * changed copyright header to reflect current distribution rules
- *
- * Revision 4.4 88/08/09 19:13:13 eggert
- * Beware merging into a readonly file.
- * Beware merging a revision to itself (no change).
- * Use execv(), not system(); yield exit status like diff(1)'s.
- *
- * Revision 4.3 87/10/18 10:38:02 narten
- * Updating version numbers. Changes relative to version 1.1
- * actually relative to 4.1
- *
- * Revision 1.3 87/09/24 14:00:31 narten
- * Sources now pass through lint (if you ignore printf/sprintf/fprintf
- * warnings)
- *
- * Revision 1.2 87/03/27 14:22:36 jenkins
- * Port to suns
- *
- * Revision 4.1 83/03/28 11:14:57 wft
- * Added handling of default branch.
- *
- * Revision 3.3 82/12/24 15:29:00 wft
- * Added call to catchsig().
- *
- * Revision 3.2 82/12/10 21:32:02 wft
- * Replaced getdelta() with gettree(); improved error messages.
- *
- * Revision 3.1 82/11/28 19:27:44 wft
- * Initial revision.
- *
- */
- #include "rcsbase.h"
-
- static char const co[] = CO;
-
- mainProg(rcsmergeId, "rcsmerge", "$Id: rcsmerge.c,v 5.10 1992/07/28 16:12:44 eggert Exp $")
- {
- static char const cmdusage[] =
- "\nrcsmerge usage: rcsmerge -rrev1 [-rrev2] [-ksubst] [-{pq}[rev]] [-Vn] [-xsuff] file";
- static char const quietarg[] = "-q";
-
- register int i;
- char *a, **newargv;
- char const *arg[3];
- char const *rev[2]; /*revision numbers*/
- char const *expandarg, *versionarg;
- int tostdout;
- int argc_min, status;
- RILE *workptr;
- struct buf commarg;
- struct buf numericrev; /* holds expanded revision number */
- struct hshentries *gendeltas; /* deltas to be generated */
- struct hshentry * target;
-
- bufautobegin(&commarg);
- bufautobegin(&numericrev);
- argc_min = 1;
- rev[0] = rev[1] = nil;
- status = 0; /* Keep lint happy. */
- tostdout = false;
- expandarg = versionarg = quietarg; /* i.e. a no-op */
- suffixes = X_DEFAULT;
-
- argc = getRCSINIT(argc, argv, &newargv);
- argv = newargv;
- while (a = *++argv, 0<--argc && *a++=='-') {
- switch (*a++) {
- case 'p':
- tostdout=true;
- goto revno;
-
- case 'q':
- quietflag = true;
- revno:
- if (!*a)
- break;
- /* falls into -r */
- case 'r':
- if (!rev[0])
- rev[0] = a;
- else if (!rev[1])
- rev[1] = a;
- else
- faterror("too many revision numbers");
- break;
- case 'x':
- suffixes = a;
- break;
- case 'V':
- versionarg = *argv;
- argc_min = setRCSversion(versionarg);
- break;
-
- case 'k':
- expandarg = *argv;
- if (0 <= str2expmode(expandarg+2))
- break;
- /* fall into */
- default:
- faterror("unknown option: %s%s", *argv, cmdusage);
- };
- } /* end of option processing */
-
- if (argc < argc_min) faterror("no input file%s", cmdusage);
- if (!rev[0]) faterror("no base revision number given");
-
- /* Now handle all pathnames. */
-
- if (0 < pairnames(argc, argv, rcsreadopen, true, false)) {
-
- if (argc>2 || (argc==2&&argv[1]!=nil))
- warn("too many arguments");
- diagnose("RCS file: %s\n", RCSname);
- if (!(workptr = Iopen(workname, FOPEN_R_WORK, (struct stat*)0)))
- efaterror(workname);
-
- gettree(); /* reads in the delta tree */
-
- if (Head==nil) faterror("no revisions present");
-
- if (!*rev[0])
- rev[0] = Dbranch ? Dbranch : Head->num;
- if (!fexpandsym(rev[0], &numericrev, workptr))
- goto end;
- if (!(target=genrevs(numericrev.string, (char *)nil, (char *)nil, (char *)nil,&gendeltas))) goto end;
- rev[0] = target->num;
- if (!rev[1] || !*rev[1])
- rev[1] = Dbranch ? Dbranch : Head->num;
- if (!fexpandsym(rev[1], &numericrev, workptr))
- goto end;
- if (!(target=genrevs(numericrev.string, (char *)nil, (char *)nil, (char *)nil,&gendeltas))) goto end;
- rev[1] = target->num;
-
- if (strcmp(rev[0],rev[1]) == 0) {
- if (tostdout) {
- FILE *o;
- # if text_equals_binary_stdio || text_work_stdio
- o = stdout;
- # else
- if (!(o=fdopen(STDOUT_FILENO,FOPEN_W_WORK)))
- efaterror("stdout");
- # endif
- fastcopy(workptr,o);
- Ofclose(o);
- }
- goto end;
- }
- Izclose(&workptr);
-
- for (i=0; i<2; i++) {
- diagnose("retrieving revision %s\n", rev[i]);
- bufscpy(&commarg, "-p");
- bufscat(&commarg, rev[i]);
- if (run(
- (char*)0,
- /* Do not collide with merger.c maketemp(). */
- arg[i+1] = maketemp(i+3),
- co, quietarg, commarg.string, expandarg,
- versionarg, RCSname, (char*)0
- ))
- faterror("co failed");
- }
- diagnose("Merging differences between %s and %s into %s%s\n",
- rev[0], rev[1], workname,
- tostdout?"; result to stdout":"");
-
- arg[0] = rev[0] = workname;
- status = merge(tostdout, rev, arg);
- }
-
- end:
- Izclose(&workptr);
- tempunlink();
- exitmain(nerror ? DIFF_TROUBLE : status);
- }
-
- #if RCS_lint
- # define exiterr rmergeExit
- #endif
- exiting void
- exiterr()
- {
- tempunlink();
- _exit(DIFF_TROUBLE);
- }
-