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-rw-r--r--bin/chmod/chmod.c248
1 files changed, 248 insertions, 0 deletions
diff --git a/bin/chmod/chmod.c b/bin/chmod/chmod.c
new file mode 100644
index 000000000000..78bf3137b9ed
--- /dev/null
+++ b/bin/chmod/chmod.c
@@ -0,0 +1,248 @@
+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * 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/param.h>
+#include <sys/stat.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <fts.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+static volatile sig_atomic_t siginfo;
+
+static void usage(void) __dead2;
+static int may_have_nfs4acl(const FTSENT *ent, int hflag);
+
+static void
+siginfo_handler(int sig __unused)
+{
+
+ siginfo = 1;
+}
+
+int
+main(int argc, char *argv[])
+{
+ FTS *ftsp;
+ FTSENT *p;
+ mode_t *set;
+ int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval;
+ int vflag;
+ char *mode;
+ mode_t newmode;
+
+ set = NULL;
+ Hflag = Lflag = Rflag = fflag = hflag = vflag = 0;
+ while ((ch = getopt(argc, argv, "HLPRXfghorstuvwx")) != -1)
+ switch (ch) {
+ 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 FreeBSD 3.0, 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 'v':
+ vflag++;
+ break;
+ case '?':
+ default:
+ usage();
+ }
+done: argv += optind;
+ argc -= optind;
+
+ if (argc < 2)
+ usage();
+
+ (void)signal(SIGINFO, siginfo_handler);
+
+ if (Rflag) {
+ if (hflag)
+ errx(1, "the -R and -h options may not be "
+ "specified together.");
+ if (Lflag) {
+ fts_options = FTS_LOGICAL;
+ } else {
+ fts_options = FTS_PHYSICAL;
+
+ if (Hflag) {
+ fts_options |= FTS_COMFOLLOW;
+ }
+ }
+ } else if (hflag) {
+ fts_options = FTS_PHYSICAL;
+ } else {
+ fts_options = FTS_LOGICAL;
+ }
+
+ mode = *argv;
+ if ((set = setmode(mode)) == NULL)
+ errx(1, "invalid file mode: %s", mode);
+
+ if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
+ err(1, "fts_open");
+ for (rval = 0; errno = 0, (p = fts_read(ftsp)) != NULL;) {
+ int atflag;
+
+ if ((fts_options & FTS_LOGICAL) ||
+ ((fts_options & FTS_COMFOLLOW) &&
+ p->fts_level == FTS_ROOTLEVEL))
+ atflag = 0;
+ else
+ atflag = AT_SYMLINK_NOFOLLOW;
+
+ switch (p->fts_info) {
+ case FTS_D:
+ if (!Rflag)
+ fts_set(ftsp, p, FTS_SKIP);
+ break;
+ case FTS_DNR: /* Warn, chmod. */
+ 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;
+ default:
+ break;
+ }
+ newmode = getmode(set, p->fts_statp->st_mode);
+ /*
+ * With NFSv4 ACLs, it is possible that applying a mode
+ * identical to the one computed from an ACL will change
+ * that ACL.
+ */
+ if (may_have_nfs4acl(p, hflag) == 0 &&
+ (newmode & ALLPERMS) == (p->fts_statp->st_mode & ALLPERMS))
+ continue;
+ if (fchmodat(AT_FDCWD, p->fts_accpath, newmode, atflag) == -1
+ && !fflag) {
+ warn("%s", p->fts_path);
+ rval = 1;
+ } else if (vflag || siginfo) {
+ (void)printf("%s", p->fts_path);
+
+ if (vflag > 1 || siginfo) {
+ char m1[12], m2[12];
+
+ strmode(p->fts_statp->st_mode, m1);
+ strmode((p->fts_statp->st_mode &
+ S_IFMT) | newmode, m2);
+ (void)printf(": 0%o [%s] -> 0%o [%s]",
+ p->fts_statp->st_mode, m1,
+ (p->fts_statp->st_mode & S_IFMT) |
+ newmode, m2);
+ }
+ (void)printf("\n");
+ siginfo = 0;
+ }
+ }
+ if (errno)
+ err(1, "fts_read");
+ exit(rval);
+}
+
+static void
+usage(void)
+{
+ (void)fprintf(stderr,
+ "usage: chmod [-fhv] [-R [-H | -L | -P]] mode file ...\n");
+ exit(1);
+}
+
+static int
+may_have_nfs4acl(const FTSENT *ent, int hflag)
+{
+ int ret;
+ static dev_t previous_dev = NODEV;
+ static int supports_acls = -1;
+
+ if (previous_dev != ent->fts_statp->st_dev) {
+ previous_dev = ent->fts_statp->st_dev;
+ supports_acls = 0;
+
+ if (hflag)
+ ret = lpathconf(ent->fts_accpath, _PC_ACL_NFS4);
+ else
+ ret = pathconf(ent->fts_accpath, _PC_ACL_NFS4);
+ if (ret > 0)
+ supports_acls = 1;
+ else if (ret < 0 && errno != EINVAL)
+ warn("%s", ent->fts_path);
+ }
+
+ return (supports_acls);
+}
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