This is addressing cases such as fts_read(3) encountering an [EIO] from fchdir(2) when FTS_NOCHDIR is not set. That would otherwise be seen as a successful traversal in some of these cases while silently discarding expected work. As noted in r264201, fts_read() does not set errno to 0 on a successful EOF so it needs to be set before calling it. Otherwise we might see a random error from one of the iterations. gzip is ignoring most errors and could be improved separately. Reviewed by: vangyzen Sponsored by: Dell EMC Differential Revision: https://reviews.freebsd.org/D27184
263 lines
6.5 KiB
C
263 lines
6.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 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
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static char const copyright[] =
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"@(#) Copyright (c) 1989, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)chmod.c 8.8 (Berkeley) 4/1/94";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <fts.h>
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#include <limits.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static volatile sig_atomic_t siginfo;
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static void usage(void);
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static int may_have_nfs4acl(const FTSENT *ent, int hflag);
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static void
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siginfo_handler(int sig __unused)
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{
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siginfo = 1;
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}
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int
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main(int argc, char *argv[])
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{
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FTS *ftsp;
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FTSENT *p;
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mode_t *set;
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int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval;
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int vflag;
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char *mode;
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mode_t newmode;
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set = NULL;
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Hflag = Lflag = Rflag = fflag = hflag = vflag = 0;
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while ((ch = getopt(argc, argv, "HLPRXfghorstuvwx")) != -1)
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switch (ch) {
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case 'H':
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Hflag = 1;
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Lflag = 0;
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break;
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case 'L':
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Lflag = 1;
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Hflag = 0;
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break;
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case 'P':
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Hflag = Lflag = 0;
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break;
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case 'R':
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Rflag = 1;
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break;
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case 'f':
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fflag = 1;
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break;
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case 'h':
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/*
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* In System V the -h option causes chmod to change
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* the mode of the symbolic link. 4.4BSD's symbolic
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* links didn't have modes, so it was an undocumented
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* noop. In FreeBSD 3.0, lchmod(2) is introduced and
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* this option does real work.
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*/
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hflag = 1;
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break;
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/*
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* XXX
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* "-[rwx]" are valid mode commands. If they are the entire
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* argument, getopt has moved past them, so decrement optind.
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* Regardless, we're done argument processing.
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*/
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case 'g': case 'o': case 'r': case 's':
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case 't': case 'u': case 'w': case 'X': case 'x':
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if (argv[optind - 1][0] == '-' &&
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argv[optind - 1][1] == ch &&
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argv[optind - 1][2] == '\0')
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--optind;
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goto done;
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case 'v':
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vflag++;
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break;
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case '?':
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default:
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usage();
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}
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done: argv += optind;
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argc -= optind;
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if (argc < 2)
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usage();
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(void)signal(SIGINFO, siginfo_handler);
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if (Rflag) {
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if (hflag)
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errx(1, "the -R and -h options may not be "
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"specified together.");
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if (Lflag) {
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fts_options = FTS_LOGICAL;
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} else {
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fts_options = FTS_PHYSICAL;
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if (Hflag) {
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fts_options |= FTS_COMFOLLOW;
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}
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}
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} else if (hflag) {
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fts_options = FTS_PHYSICAL;
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} else {
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fts_options = FTS_LOGICAL;
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}
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mode = *argv;
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if ((set = setmode(mode)) == NULL)
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errx(1, "invalid file mode: %s", mode);
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if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
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err(1, "fts_open");
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for (rval = 0; errno = 0, (p = fts_read(ftsp)) != NULL;) {
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int atflag;
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if ((fts_options & FTS_LOGICAL) ||
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((fts_options & FTS_COMFOLLOW) &&
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p->fts_level == FTS_ROOTLEVEL))
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atflag = 0;
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else
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atflag = AT_SYMLINK_NOFOLLOW;
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switch (p->fts_info) {
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case FTS_D:
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if (!Rflag)
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fts_set(ftsp, p, FTS_SKIP);
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break;
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case FTS_DNR: /* Warn, chmod. */
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warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
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rval = 1;
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break;
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case FTS_DP: /* Already changed at FTS_D. */
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continue;
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case FTS_ERR: /* Warn, continue. */
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case FTS_NS:
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warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
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rval = 1;
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continue;
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default:
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break;
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}
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newmode = getmode(set, p->fts_statp->st_mode);
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/*
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* With NFSv4 ACLs, it is possible that applying a mode
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* identical to the one computed from an ACL will change
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* that ACL.
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*/
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if (may_have_nfs4acl(p, hflag) == 0 &&
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(newmode & ALLPERMS) == (p->fts_statp->st_mode & ALLPERMS))
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continue;
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if (fchmodat(AT_FDCWD, p->fts_accpath, newmode, atflag) == -1
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&& !fflag) {
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warn("%s", p->fts_path);
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rval = 1;
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} else if (vflag || siginfo) {
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(void)printf("%s", p->fts_path);
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if (vflag > 1 || siginfo) {
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char m1[12], m2[12];
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strmode(p->fts_statp->st_mode, m1);
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strmode((p->fts_statp->st_mode &
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S_IFMT) | newmode, m2);
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(void)printf(": 0%o [%s] -> 0%o [%s]",
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p->fts_statp->st_mode, m1,
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(p->fts_statp->st_mode & S_IFMT) |
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newmode, m2);
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}
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(void)printf("\n");
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siginfo = 0;
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}
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}
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if (errno)
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err(1, "fts_read");
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exit(rval);
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr,
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"usage: chmod [-fhv] [-R [-H | -L | -P]] mode file ...\n");
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exit(1);
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}
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static int
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may_have_nfs4acl(const FTSENT *ent, int hflag)
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{
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int ret;
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static dev_t previous_dev = NODEV;
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static int supports_acls = -1;
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if (previous_dev != ent->fts_statp->st_dev) {
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previous_dev = ent->fts_statp->st_dev;
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supports_acls = 0;
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if (hflag)
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ret = lpathconf(ent->fts_accpath, _PC_ACL_NFS4);
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else
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ret = pathconf(ent->fts_accpath, _PC_ACL_NFS4);
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if (ret > 0)
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supports_acls = 1;
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else if (ret < 0 && errno != EINVAL)
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warn("%s", ent->fts_path);
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}
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return (supports_acls);
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}
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