NetBSD/bin/chmod/chmod.c

240 lines
6.0 KiB
C

/* $NetBSD: chmod.c,v 1.38 2012/10/22 18:00:46 christos Exp $ */
/*
* Copyright (c) 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT(
"@(#) Copyright (c) 1989, 1993, 1994\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)chmod.c 8.8 (Berkeley) 4/1/94";
#else
__RCSID("$NetBSD: chmod.c,v 1.38 2012/10/22 18:00:46 christos Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <err.h>
#include <errno.h>
#include <fts.h>
#include <limits.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <getopt.h>
__dead static void usage(void);
struct option chmod_longopts[] = {
{ "reference", required_argument, 0,
1 },
{ NULL, 0, 0,
0 },
};
int
main(int argc, char *argv[])
{
FTS *ftsp;
FTSENT *p;
void *set;
mode_t mval;
int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval;
char *mode, *reference;
int (*change_mode)(const char *, mode_t);
setprogname(argv[0]);
(void)setlocale(LC_ALL, "");
Hflag = Lflag = Rflag = fflag = hflag = 0;
reference = NULL;
while ((ch = getopt_long(argc, argv, "HLPRXfghorstuwx",
chmod_longopts, NULL)) != -1)
switch (ch) {
case 1:
reference = optarg;
break;
case 'H':
Hflag = 1;
Lflag = 0;
break;
case 'L':
Lflag = 1;
Hflag = 0;
break;
case 'P':
Hflag = Lflag = 0;
break;
case 'R':
Rflag = 1;
break;
case 'f':
fflag = 1;
break;
case 'h':
/*
* In System V the -h option causes chmod to
* change the mode of the symbolic link.
* 4.4BSD's symbolic links didn't have modes,
* so it was an undocumented noop. In NetBSD
* 1.3, lchmod(2) is introduced and this
* option does real work.
*/
hflag = 1;
break;
/*
* XXX
* "-[rwx]" are valid mode commands. If they are the entire
* argument, getopt has moved past them, so decrement optind.
* Regardless, we're done argument processing.
*/
case 'g': case 'o': case 'r': case 's':
case 't': case 'u': case 'w': case 'X': case 'x':
if (argv[optind - 1][0] == '-' &&
argv[optind - 1][1] == ch &&
argv[optind - 1][2] == '\0')
--optind;
goto done;
case '?':
default:
usage();
}
done: argv += optind;
argc -= optind;
if (argc == 0 || (argc == 1 && reference == NULL))
usage();
fts_options = FTS_PHYSICAL;
if (Rflag) {
if (hflag) {
errx(EXIT_FAILURE,
"the -R and -h options may not be specified together.");
/* NOTREACHED */
}
if (Hflag)
fts_options |= FTS_COMFOLLOW;
if (Lflag) {
fts_options &= ~FTS_PHYSICAL;
fts_options |= FTS_LOGICAL;
}
} else if (!hflag)
fts_options |= FTS_COMFOLLOW;
if (hflag)
change_mode = lchmod;
else
change_mode = chmod;
if (reference == NULL) {
mode = *argv++;
if ((set = setmode(mode)) == NULL) {
err(EXIT_FAILURE, "Cannot set file mode `%s'", mode);
/* NOTREACHED */
}
mval = 0;
} else {
struct stat st;
if (stat(reference, &st) == -1)
err(EXIT_FAILURE, "Cannot stat `%s'", reference);
mval = st.st_mode;
set = NULL;
}
if ((ftsp = fts_open(argv, fts_options, 0)) == NULL) {
err(EXIT_FAILURE, "fts_open");
/* NOTREACHED */
}
for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
switch (p->fts_info) {
case FTS_D:
if (!Rflag)
(void)fts_set(ftsp, p, FTS_SKIP);
break;
case FTS_DNR: /* Warn, chmod, continue. */
warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
rval = 1;
break;
case FTS_DP: /* Already changed at FTS_D. */
continue;
case FTS_ERR: /* Warn, continue. */
case FTS_NS:
warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
rval = 1;
continue;
case FTS_SL: /* Ignore. */
case FTS_SLNONE:
/*
* The only symlinks that end up here are ones that
* don't point to anything and ones that we found
* doing a physical walk.
*/
if (!hflag)
continue;
/* else */
/* FALLTHROUGH */
default:
break;
}
if ((*change_mode)(p->fts_accpath,
set ? getmode(set, p->fts_statp->st_mode) : mval)
&& !fflag) {
warn("%s", p->fts_path);
rval = 1;
}
}
if (errno) {
err(EXIT_FAILURE, "fts_read");
/* NOTREACHED */
}
exit(rval);
/* NOTREACHED */
}
static void
usage(void)
{
(void)fprintf(stderr,
"Usage: %s [-R [-H | -L | -P]] [-fh] mode file ...\n"
"\t%s [-R [-H | -L | -P]] [-fh] --reference=rfile file ...\n",
getprogname(), getprogname());
exit(1);
/* NOTREACHED */
}