NetBSD/bin/chmod/chmod.c

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/* $NetBSD: chmod.c,v 1.36 2011/08/29 14:51:17 joerg Exp $ */
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/*
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* Copyright (c) 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
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*
* 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
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* 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>
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#ifndef lint
__COPYRIGHT(
"@(#) Copyright (c) 1989, 1993, 1994\
The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
#ifndef lint
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#if 0
static char sccsid[] = "@(#)chmod.c 8.8 (Berkeley) 4/1/94";
#else
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__RCSID("$NetBSD: chmod.c,v 1.36 2011/08/29 14:51:17 joerg Exp $");
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#endif
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#endif /* not lint */
#include <sys/param.h>
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#include <sys/stat.h>
#include <sys/types.h>
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#include <err.h>
#include <errno.h>
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#include <fts.h>
#include <limits.h>
#include <locale.h>
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#include <stdio.h>
#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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__dead static void usage(void);
int
main(int argc, char *argv[])
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{
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FTS *ftsp;
FTSENT *p;
mode_t *set;
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int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval;
char *mode;
int (*change_mode)(const char *, mode_t);
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setprogname(argv[0]);
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(void)setlocale(LC_ALL, "");
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Hflag = Lflag = Rflag = fflag = hflag = 0;
while ((ch = getopt(argc, argv, "HLPRXfghorstuwx")) != -1)
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switch (ch) {
case 'H':
Hflag = 1;
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Lflag = 0;
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break;
case 'L':
Lflag = 1;
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Hflag = 0;
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break;
case 'P':
Hflag = Lflag = 0;
break;
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case 'R':
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Rflag = 1;
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break;
case 'f':
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fflag = 1;
break;
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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.
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*/
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;
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goto done;
case '?':
default:
usage();
}
done: argv += optind;
argc -= optind;
if (argc < 2)
usage();
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fts_options = FTS_PHYSICAL;
if (Rflag) {
if (hflag) {
errx(EXIT_FAILURE,
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"the -R and -h options may not be specified together.");
/* NOTREACHED */
}
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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;
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mode = *argv;
if ((set = setmode(mode)) == NULL) {
err(EXIT_FAILURE, "Cannot set file mode `%s'", mode);
/* NOTREACHED */
}
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if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) {
err(EXIT_FAILURE, "fts_open");
/* NOTREACHED */
}
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for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
switch (p->fts_info) {
case FTS_D:
if (!Rflag)
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(void)fts_set(ftsp, p, FTS_SKIP);
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break;
case FTS_DNR: /* Warn, chmod, continue. */
warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
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rval = 1;
break;
case FTS_DP: /* Already changed at FTS_D. */
continue;
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case FTS_ERR: /* Warn, continue. */
case FTS_NS:
warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
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rval = 1;
continue;
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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 */
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default:
break;
}
if ((*change_mode)(p->fts_accpath,
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getmode(set, p->fts_statp->st_mode)) && !fflag) {
warn("%s", p->fts_path);
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rval = 1;
}
}
if (errno) {
err(EXIT_FAILURE, "fts_read");
/* NOTREACHED */
}
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exit(rval);
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/* NOTREACHED */
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}
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static void
usage(void)
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{
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(void)fprintf(stderr,
"usage: %s [-R [-H | -L | -P]] [-fh] mode file ...\n",
getprogname());
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exit(1);
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/* NOTREACHED */
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}