OpenBSD-4.6/usr.bin/cvs/diff.c
/* $OpenBSD: diff.c,v 1.155 2009/06/07 08:39:13 ray Exp $ */
/*
* Copyright (c) 2008 Tobias Stoeckmann <tobias@openbsd.org>
* Copyright (c) 2006 Joris Vink <joris@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/stat.h>
#include <sys/time.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "cvs.h"
#include "diff.h"
#include "remote.h"
void cvs_diff_local(struct cvs_file *);
static int dflags = 0;
static int Nflag = 0;
static int force_head = 0;
static char *koptstr;
static char *rev1 = NULL;
static char *rev2 = NULL;
static time_t date1 = -1;
static time_t date2 = -1;
static char *dateflag1 = NULL;
static char *dateflag2 = NULL;
struct cvs_cmd cvs_cmd_diff = {
CVS_OP_DIFF, CVS_USE_WDIR, "diff",
{ "di", "dif" },
"Show differences between revisions",
"[-abcdilNnpRuw] [[-D date] [-r rev] [-D date2 | -r rev2]] "
"[-k mode] [file ...]",
"abcfdD:ik:lNnpr:Ruw",
NULL,
cvs_diff
};
struct cvs_cmd cvs_cmd_rdiff = {
CVS_OP_RDIFF, 0, "rdiff",
{ "patch", "pa" },
"Show differences between revisions",
"[-flR] [-c | -u] [-s | -t] [-V ver] -D date | -r rev\n"
"[-D date2 | -r rev2] [-k mode] module ...",
"cfD:k:lr:RuV:",
NULL,
cvs_diff
};
int
cvs_diff(int argc, char **argv)
{
int ch, flags;
char *arg = ".";
struct cvs_recursion cr;
flags = CR_RECURSE_DIRS;
strlcpy(diffargs, cvs_cmdop == CVS_OP_DIFF ? "diff" : "rdiff",
sizeof(diffargs));
while ((ch = getopt(argc, argv, cvs_cmdop == CVS_OP_DIFF ?
cvs_cmd_diff.cmd_opts : cvs_cmd_rdiff.cmd_opts)) != -1) {
switch (ch) {
case 'a':
strlcat(diffargs, " -a", sizeof(diffargs));
dflags |= D_FORCEASCII;
break;
case 'b':
strlcat(diffargs, " -b", sizeof(diffargs));
dflags |= D_FOLDBLANKS;
break;
case 'c':
strlcat(diffargs, " -c", sizeof(diffargs));
diff_format = D_CONTEXT;
break;
case 'd':
strlcat(diffargs, " -d", sizeof(diffargs));
dflags |= D_MINIMAL;
break;
case 'D':
if (date1 == -1 && rev1 == NULL) {
date1 = cvs_date_parse(optarg);
dateflag1 = optarg;
} else if (date2 == -1 && rev2 == NULL) {
date2 = cvs_date_parse(optarg);
dateflag2 = optarg;
} else {
fatal("no more than 2 revisions/dates can"
" be specified");
}
break;
case 'f':
force_head = 1;
break;
case 'i':
strlcat(diffargs, " -i", sizeof(diffargs));
dflags |= D_IGNORECASE;
break;
case 'k':
koptstr = optarg;
kflag = rcs_kflag_get(koptstr);
if (RCS_KWEXP_INVAL(kflag)) {
cvs_log(LP_ERR,
"invalid RCS keyword expansion mode");
fatal("%s", cvs_cmdop == CVS_OP_DIFF ?
cvs_cmd_diff.cmd_synopsis :
cvs_cmd_rdiff.cmd_synopsis);
}
break;
case 'l':
flags &= ~CR_RECURSE_DIRS;
break;
case 'n':
strlcat(diffargs, " -n", sizeof(diffargs));
diff_format = D_RCSDIFF;
break;
case 'N':
strlcat(diffargs, " -N", sizeof(diffargs));
Nflag = 1;
break;
case 'p':
strlcat(diffargs, " -p", sizeof(diffargs));
dflags |= D_PROTOTYPE;
break;
case 'R':
flags |= CR_RECURSE_DIRS;
break;
case 'r':
if (date1 == -1 && rev1 == NULL) {
rev1 = optarg;
} else if (date2 == -1 && rev2 == NULL) {
rev2 = optarg;
} else {
fatal("no more than 2 revisions/dates can"
" be specified");
}
break;
case 't':
strlcat(diffargs, " -t", sizeof(diffargs));
dflags |= D_EXPANDTABS;
break;
case 'u':
strlcat(diffargs, " -u", sizeof(diffargs));
diff_format = D_UNIFIED;
break;
case 'V':
fatal("the -V option is obsolete "
"and should not be used");
case 'w':
strlcat(diffargs, " -w", sizeof(diffargs));
dflags |= D_IGNOREBLANKS;
break;
default:
fatal("%s", cvs_cmdop == CVS_OP_DIFF ?
cvs_cmd_diff.cmd_synopsis :
cvs_cmd_rdiff.cmd_synopsis);
}
}
argc -= optind;
argv += optind;
cr.enterdir = NULL;
cr.leavedir = NULL;
if (cvs_cmdop == CVS_OP_RDIFF) {
if (rev1 == NULL && rev2 == NULL && dateflag1 == NULL &&
dateflag2 == NULL)
fatal("must specify at least one revision/date!");
if (!argc)
fatal("%s", cvs_cmd_rdiff.cmd_synopsis);
if (!diff_format) {
strlcat(diffargs, " -c", sizeof(diffargs));
diff_format = D_CONTEXT;
}
flags |= CR_REPO;
}
if (current_cvsroot->cr_method != CVS_METHOD_LOCAL) {
cvs_client_connect_to_server();
cr.fileproc = cvs_client_sendfile;
if (!(flags & CR_RECURSE_DIRS))
cvs_client_send_request("Argument -l");
if (kflag)
cvs_client_send_request("Argument -k%s", koptstr);
switch (diff_format) {
case D_CONTEXT:
cvs_client_send_request("Argument -c");
break;
case D_RCSDIFF:
cvs_client_send_request("Argument -n");
break;
case D_UNIFIED:
cvs_client_send_request("Argument -u");
break;
default:
break;
}
if (Nflag == 1)
cvs_client_send_request("Argument -N");
if (dflags & D_PROTOTYPE)
cvs_client_send_request("Argument -p");
if (rev1 != NULL)
cvs_client_send_request("Argument -r%s", rev1);
if (rev2 != NULL)
cvs_client_send_request("Argument -r%s", rev2);
if (dateflag1 != NULL)
cvs_client_send_request("Argument -D%s", dateflag1);
if (dateflag2 != NULL)
cvs_client_send_request("Argument -D%s", dateflag2);
} else {
if (cvs_cmdop == CVS_OP_RDIFF &&
chdir(current_cvsroot->cr_dir) == -1)
fatal("cvs_diff: %s", strerror(errno));
cr.fileproc = cvs_diff_local;
}
cr.flags = flags;
diff_rev1 = diff_rev2 = NULL;
if (cvs_cmdop == CVS_OP_DIFF ||
current_cvsroot->cr_method == CVS_METHOD_LOCAL) {
if (argc > 0)
cvs_file_run(argc, argv, &cr);
else
cvs_file_run(1, &arg, &cr);
}
if (current_cvsroot->cr_method != CVS_METHOD_LOCAL) {
cvs_client_send_files(argv, argc);
cvs_client_senddir(".");
cvs_client_send_request((cvs_cmdop == CVS_OP_RDIFF) ?
"rdiff" : "diff");
cvs_client_get_responses();
}
return (0);
}
void
cvs_diff_local(struct cvs_file *cf)
{
BUF *b1;
int fd1, fd2;
struct stat st;
struct timeval tv[2], tv2[2];
struct tm datetm;
char rbuf[CVS_REV_BUFSZ], tbuf[CVS_TIME_BUFSZ], *p1, *p2;
b1 = NULL;
fd1 = fd2 = -1;
p1 = p2 = NULL;
cvs_log(LP_TRACE, "cvs_diff_local(%s)", cf->file_path);
if (cf->file_type == CVS_DIR) {
if (verbosity > 1)
cvs_log(LP_ERR, "Diffing inside %s", cf->file_path);
return;
}
cvs_file_classify(cf, cvs_directory_tag);
if (cvs_cmdop == CVS_OP_DIFF) {
if (cf->file_ent == NULL) {
cvs_log(LP_ERR, "I know nothing about %s",
cf->file_path);
return;
}
switch (cf->file_ent->ce_status) {
case CVS_ENT_ADDED:
if (Nflag == 0) {
cvs_log(LP_ERR, "%s is a new entry, no "
"comparison available", cf->file_path);
return;
}
if (!(cf->file_flags & FILE_ON_DISK)) {
cvs_log(LP_ERR, "cannot find %s",
cf->file_path);
return;
}
break;
case CVS_ENT_REMOVED:
if (Nflag == 0) {
cvs_log(LP_ERR, "%s was removed, no "
"comparison available", cf->file_path);
return;
}
if (cf->file_rcs == NULL) {
cvs_log(LP_ERR, "cannot find RCS file for %s",
cf->file_path);
return;
}
break;
default:
if (!(cf->file_flags & FILE_ON_DISK)) {
cvs_printf("? %s\n", cf->file_path);
return;
}
if (cf->file_rcs == NULL) {
cvs_log(LP_ERR, "cannot find RCS file for %s",
cf->file_path);
return;
}
break;
}
}
if (cf->file_status == FILE_UPTODATE && rev1 == NULL && rev2 == NULL &&
date1 == -1 && date2 == -1)
return;
if (cf->file_rcs != NULL && cf->file_rcs->rf_head == NULL) {
cvs_log(LP_ERR, "no head revision in RCS file for %s\n",
cf->file_path);
return;
}
if (kflag && cf->file_rcs != NULL)
rcs_kwexp_set(cf->file_rcs, kflag);
if (cf->file_rcs == NULL)
diff_rev1 = NULL;
else if (rev1 != NULL || date1 != -1) {
cvs_specified_date = date1;
diff_rev1 = rcs_translate_tag(rev1, cf->file_rcs);
if (diff_rev1 == NULL && cvs_cmdop == CVS_OP_DIFF) {
if (rev1 != NULL) {
cvs_log(LP_ERR, "tag %s not in file %s", rev1,
cf->file_path);
goto cleanup;
} else if (Nflag) {
diff_rev1 = NULL;
} else {
gmtime_r(&cvs_specified_date, &datetm);
strftime(tbuf, sizeof(tbuf),
"%Y.%m.%d.%H.%M.%S", &datetm);
cvs_log(LP_ERR, "no revision for date %s in "
"file %s", tbuf, cf->file_path);
goto cleanup;
}
} else if (diff_rev1 == NULL && cvs_cmdop == CVS_OP_RDIFF &&
force_head) {
/* -f is not allowed for unknown symbols */
if ((diff_rev1 = rcsnum_parse(rev1)) == NULL)
fatal("no such tag %s", rev1);
rcsnum_free(diff_rev1);
diff_rev1 = cf->file_rcs->rf_head;
}
cvs_specified_date = -1;
} else if (cvs_cmdop == CVS_OP_DIFF) {
if (cf->file_ent->ce_status == CVS_ENT_ADDED)
diff_rev1 = NULL;
else
diff_rev1 = cf->file_ent->ce_rev;
}
if (cf->file_rcs == NULL)
diff_rev2 = NULL;
else if (rev2 != NULL || date2 != -1) {
cvs_specified_date = date2;
diff_rev2 = rcs_translate_tag(rev2, cf->file_rcs);
if (diff_rev2 == NULL && cvs_cmdop == CVS_OP_DIFF) {
if (rev2 != NULL) {
cvs_log(LP_ERR, "tag %s not in file %s", rev2,
cf->file_path);
goto cleanup;
} else if (Nflag) {
diff_rev2 = NULL;
} else {
gmtime_r(&cvs_specified_date, &datetm);
strftime(tbuf, sizeof(tbuf),
"%Y.%m.%d.%H.%M.%S", &datetm);
cvs_log(LP_ERR, "no revision for date %s in "
"file %s", tbuf, cf->file_path);
goto cleanup;
}
} else if (diff_rev2 == NULL && cvs_cmdop == CVS_OP_RDIFF &&
force_head) {
/* -f is not allowed for unknown symbols */
if ((diff_rev2 = rcsnum_parse(rev2)) == NULL)
fatal("no such tag %s", rev2);
rcsnum_free(diff_rev2);
diff_rev2 = cf->file_rcs->rf_head;
}
cvs_specified_date = -1;
} else if (cvs_cmdop == CVS_OP_RDIFF)
diff_rev2 = cf->file_rcs->rf_head;
else if (cf->file_ent->ce_status == CVS_ENT_REMOVED)
diff_rev2 = NULL;
if (diff_rev1 != NULL && diff_rev2 != NULL &&
rcsnum_cmp(diff_rev1, diff_rev2, 0) == 0)
goto cleanup;
switch (cvs_cmdop) {
case CVS_OP_DIFF:
if (cf->file_status == FILE_UPTODATE) {
if (diff_rev2 == NULL &&
!rcsnum_cmp(diff_rev1, cf->file_rcsrev, 0))
goto cleanup;
}
break;
case CVS_OP_RDIFF:
if (diff_rev1 == NULL && diff_rev2 == NULL)
goto cleanup;
break;
}
cvs_printf("Index: %s\n", cf->file_path);
if (cvs_cmdop == CVS_OP_DIFF)
cvs_printf("%s\nRCS file: %s\n", RCS_DIFF_DIV,
cf->file_rcs != NULL ? cf->file_rpath : cf->file_path);
if (diff_rev1 != NULL) {
if (cvs_cmdop == CVS_OP_DIFF && diff_rev1 != NULL) {
(void)rcsnum_tostr(diff_rev1, rbuf, sizeof(rbuf));
cvs_printf("retrieving revision %s\n", rbuf);
}
tv[0].tv_sec = rcs_rev_getdate(cf->file_rcs, diff_rev1);
tv[0].tv_usec = 0;
tv[1] = tv[0];
(void)xasprintf(&p1, "%s/diff1.XXXXXXXXXX", cvs_tmpdir);
fd1 = rcs_rev_write_stmp(cf->file_rcs, diff_rev1, p1, 0);
if (futimes(fd1, tv) == -1)
fatal("cvs_diff_local: utimes failed");
}
if (diff_rev2 != NULL) {
if (cvs_cmdop == CVS_OP_DIFF && rev2 != NULL) {
(void)rcsnum_tostr(diff_rev2, rbuf, sizeof(rbuf));
cvs_printf("retrieving revision %s\n", rbuf);
}
tv2[0].tv_sec = rcs_rev_getdate(cf->file_rcs, diff_rev2);
tv2[0].tv_usec = 0;
tv2[1] = tv2[0];
(void)xasprintf(&p2, "%s/diff2.XXXXXXXXXX", cvs_tmpdir);
fd2 = rcs_rev_write_stmp(cf->file_rcs, diff_rev2, p2, 0);
if (futimes(fd2, tv2) == -1)
fatal("cvs_diff_local: utimes failed");
} else if (cvs_cmdop == CVS_OP_DIFF &&
(cf->file_flags & FILE_ON_DISK) &&
cf->file_ent->ce_status != CVS_ENT_REMOVED) {
(void)xasprintf(&p2, "%s/diff2.XXXXXXXXXX", cvs_tmpdir);
if (cvs_server_active == 1 && cf->fd == -1) {
tv2[0].tv_sec = rcs_rev_getdate(cf->file_rcs,
cf->file_ent->ce_rev);
tv2[0].tv_usec = 0;
tv2[1] = tv2[0];
fd2 = rcs_rev_write_stmp(cf->file_rcs,
cf->file_ent->ce_rev, p2, 0);
if (futimes(fd2, tv2) == -1)
fatal("cvs_diff_local: futimes failed");
} else {
if (fstat(cf->fd, &st) == -1)
fatal("fstat failed %s", strerror(errno));
b1 = cvs_buf_load_fd(cf->fd);
tv2[0].tv_sec = st.st_mtime;
tv2[0].tv_usec = 0;
tv2[1] = tv2[0];
fd2 = cvs_buf_write_stmp(b1, p2, tv2);
cvs_buf_free(b1);
}
}
switch (cvs_cmdop) {
case CVS_OP_DIFF:
cvs_printf("%s", diffargs);
if (rev1 != NULL && diff_rev1 != NULL) {
(void)rcsnum_tostr(diff_rev1, rbuf, sizeof(rbuf));
cvs_printf(" -r%s", rbuf);
if (rev2 != NULL && diff_rev2 != NULL) {
(void)rcsnum_tostr(diff_rev2, rbuf,
sizeof(rbuf));
cvs_printf(" -r%s", rbuf);
}
}
if (diff_rev2 == NULL)
cvs_printf(" %s", cf->file_path);
cvs_printf("\n");
break;
case CVS_OP_RDIFF:
cvs_printf("diff ");
switch (diff_format) {
case D_CONTEXT:
cvs_printf("-c ");
break;
case D_RCSDIFF:
cvs_printf("-n ");
break;
case D_UNIFIED:
cvs_printf("-u ");
break;
default:
break;
}
if (diff_rev1 == NULL) {
cvs_printf("%s ", CVS_PATH_DEVNULL);
} else {
(void)rcsnum_tostr(diff_rev1, rbuf, sizeof(rbuf));
cvs_printf("%s:%s ", cf->file_path, rbuf);
}
if (diff_rev2 == NULL) {
cvs_printf("%s:removed\n", cf->file_path);
} else {
(void)rcsnum_tostr(diff_rev2 != NULL ? diff_rev2 :
cf->file_rcs->rf_head, rbuf, sizeof(rbuf));
cvs_printf("%s:%s\n", cf->file_path, rbuf);
}
break;
}
if (fd1 == -1) {
if ((fd1 = open(CVS_PATH_DEVNULL, O_RDONLY, 0)) == -1)
fatal("cannot open %s", CVS_PATH_DEVNULL);
}
if (fd2 == -1) {
if ((fd2 = open(CVS_PATH_DEVNULL, O_RDONLY, 0)) == -1)
fatal("cannot open %s", CVS_PATH_DEVNULL);
}
if (diffreg(p1 != NULL ? cf->file_path : CVS_PATH_DEVNULL,
p2 != NULL ? cf->file_path : CVS_PATH_DEVNULL, fd1, fd2, NULL,
dflags) == D_ERROR)
fatal("cvs_diff_local: failed to get RCS patch");
close(fd1);
close(fd2);
cvs_worklist_run(&temp_files, cvs_worklist_unlink);
if (p1 != NULL)
xfree(p1);
if (p2 != NULL)
xfree(p2);
cleanup:
if (diff_rev1 != NULL &&
(cf->file_rcs == NULL || diff_rev1 != cf->file_rcs->rf_head) &&
(cf->file_ent == NULL || diff_rev1 != cf->file_ent->ce_rev))
xfree(diff_rev1);
diff_rev1 = NULL;
if (diff_rev2 != NULL &&
(cf->file_rcs == NULL || diff_rev2 != cf->file_rcs->rf_head))
xfree(diff_rev2);
diff_rev2 = NULL;
}