2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1989, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 static char const copyright[] =
35 "@(#) Copyright (c) 1989, 1993, 1994\n\
36 The Regents of the University of California. All rights reserved.\n";
40 static char sccsid[] = "@(#)chmod.c 8.8 (Berkeley) 4/1/94";
43 #include <sys/cdefs.h>
44 __FBSDID("$FreeBSD$");
46 #include <sys/param.h>
60 static volatile sig_atomic_t siginfo;
62 static void usage(void);
63 static int may_have_nfs4acl(const FTSENT *ent, int hflag);
66 siginfo_handler(int sig __unused)
73 main(int argc, char *argv[])
78 int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval;
84 Hflag = Lflag = Rflag = fflag = hflag = vflag = 0;
85 while ((ch = getopt(argc, argv, "HLPRXfghorstuvwx")) != -1)
106 * In System V the -h option causes chmod to change
107 * the mode of the symbolic link. 4.4BSD's symbolic
108 * links didn't have modes, so it was an undocumented
109 * noop. In FreeBSD 3.0, lchmod(2) is introduced and
110 * this option does real work.
116 * "-[rwx]" are valid mode commands. If they are the entire
117 * argument, getopt has moved past them, so decrement optind.
118 * Regardless, we're done argument processing.
120 case 'g': case 'o': case 'r': case 's':
121 case 't': case 'u': case 'w': case 'X': case 'x':
122 if (argv[optind - 1][0] == '-' &&
123 argv[optind - 1][1] == ch &&
124 argv[optind - 1][2] == '\0')
134 done: argv += optind;
140 (void)signal(SIGINFO, siginfo_handler);
144 errx(1, "the -R and -h options may not be "
145 "specified together.");
147 fts_options = FTS_LOGICAL;
149 fts_options = FTS_PHYSICAL;
152 fts_options |= FTS_COMFOLLOW;
156 fts_options = FTS_PHYSICAL;
158 fts_options = FTS_LOGICAL;
162 if ((set = setmode(mode)) == NULL)
163 errx(1, "invalid file mode: %s", mode);
165 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
167 for (rval = 0; errno = 0, (p = fts_read(ftsp)) != NULL;) {
170 if ((fts_options & FTS_LOGICAL) ||
171 ((fts_options & FTS_COMFOLLOW) &&
172 p->fts_level == FTS_ROOTLEVEL))
175 atflag = AT_SYMLINK_NOFOLLOW;
177 switch (p->fts_info) {
180 fts_set(ftsp, p, FTS_SKIP);
182 case FTS_DNR: /* Warn, chmod. */
183 warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
186 case FTS_DP: /* Already changed at FTS_D. */
188 case FTS_ERR: /* Warn, continue. */
190 warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
196 newmode = getmode(set, p->fts_statp->st_mode);
198 * With NFSv4 ACLs, it is possible that applying a mode
199 * identical to the one computed from an ACL will change
202 if (may_have_nfs4acl(p, hflag) == 0 &&
203 (newmode & ALLPERMS) == (p->fts_statp->st_mode & ALLPERMS))
205 if (fchmodat(AT_FDCWD, p->fts_accpath, newmode, atflag) == -1
207 warn("%s", p->fts_path);
209 } else if (vflag || siginfo) {
210 (void)printf("%s", p->fts_path);
212 if (vflag > 1 || siginfo) {
215 strmode(p->fts_statp->st_mode, m1);
216 strmode((p->fts_statp->st_mode &
217 S_IFMT) | newmode, m2);
218 (void)printf(": 0%o [%s] -> 0%o [%s]",
219 p->fts_statp->st_mode, m1,
220 (p->fts_statp->st_mode & S_IFMT) |
235 (void)fprintf(stderr,
236 "usage: chmod [-fhv] [-R [-H | -L | -P]] mode file ...\n");
241 may_have_nfs4acl(const FTSENT *ent, int hflag)
244 static dev_t previous_dev = NODEV;
245 static int supports_acls = -1;
247 if (previous_dev != ent->fts_statp->st_dev) {
248 previous_dev = ent->fts_statp->st_dev;
252 ret = lpathconf(ent->fts_accpath, _PC_ACL_NFS4);
254 ret = pathconf(ent->fts_accpath, _PC_ACL_NFS4);
257 else if (ret < 0 && errno != EINVAL)
258 warn("%s", ent->fts_path);
261 return (supports_acls);