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![Warner Losh](/assets/img/avatar_default.png)
We've ifdef'd out the copyright strings for some time now. Go ahead and remove the ifdefs. Plus whatever other detritis was left over from other recent removals. These copyright strings are present in the comments and are largely from CSRG's attempt at adding their copyright to every binary file (which modern interpretations of the license doesn't require). Sponsored by: Netflix
315 lines
7.3 KiB
C
315 lines
7.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1988, 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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#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 <grp.h>
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#include <libgen.h>
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#include <pwd.h>
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#include <signal.h>
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#include <stddef.h>
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#include <stdint.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 void a_gid(const char *);
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static void a_uid(const char *);
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static void chownerr(const char *);
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static uid_t id(const char *, const char *);
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static void usage(void);
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static void print_info(const FTSENT *, int);
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static uid_t uid;
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static gid_t gid;
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static int ischown;
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static const char *gname;
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static volatile sig_atomic_t siginfo;
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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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int Hflag, Lflag, Rflag, fflag, hflag, vflag, xflag;
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int ch, fts_options, rval;
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char *cp;
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ischown = (strcmp(basename(argv[0]), "chown") == 0);
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Hflag = Lflag = Rflag = fflag = hflag = vflag = xflag = 0;
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while ((ch = getopt(argc, argv, "HLPRfhvx")) != -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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hflag = 1;
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break;
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case 'v':
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vflag++;
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break;
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case 'x':
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xflag = 1;
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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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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 && (Hflag || Lflag))
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errx(1, "the -R%c and -h options may not be "
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"specified together", Hflag ? 'H' : 'L');
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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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if (xflag)
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fts_options |= FTS_XDEV;
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uid = (uid_t)-1;
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gid = (gid_t)-1;
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if (ischown) {
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if ((cp = strchr(*argv, ':')) != NULL) {
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*cp++ = '\0';
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a_gid(cp);
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}
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#ifdef SUPPORT_DOT
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else if ((cp = strchr(*argv, '.')) != NULL) {
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warnx("separation of user and group with a period is deprecated");
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*cp++ = '\0';
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a_gid(cp);
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}
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#endif
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a_uid(*argv);
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} else
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a_gid(*argv);
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if ((ftsp = fts_open(++argv, fts_options, NULL)) == NULL)
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err(1, NULL);
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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: /* Change it at FTS_DP. */
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if (!Rflag)
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fts_set(ftsp, p, FTS_SKIP);
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continue;
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case FTS_DNR: /* Warn, chown. */
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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_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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if (siginfo) {
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print_info(p, 2);
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siginfo = 0;
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}
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if ((uid == (uid_t)-1 || uid == p->fts_statp->st_uid) &&
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(gid == (gid_t)-1 || gid == p->fts_statp->st_gid))
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continue;
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if (fchownat(AT_FDCWD, p->fts_accpath, uid, gid, atflag)
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== -1 && !fflag) {
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chownerr(p->fts_path);
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rval = 1;
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} else if (vflag)
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print_info(p, vflag);
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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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a_gid(const char *s)
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{
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struct group *gr;
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if (*s == '\0') /* Argument was "uid[:.]". */
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return;
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gname = s;
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gid = ((gr = getgrnam(s)) != NULL) ? gr->gr_gid : id(s, "group");
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}
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static void
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a_uid(const char *s)
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{
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struct passwd *pw;
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if (*s == '\0') /* Argument was "[:.]gid". */
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return;
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uid = ((pw = getpwnam(s)) != NULL) ? pw->pw_uid : id(s, "user");
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}
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static uid_t
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id(const char *name, const char *type)
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{
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unsigned long val;
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char *ep;
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errno = 0;
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val = strtoul(name, &ep, 10);
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_Static_assert(UID_MAX >= GID_MAX, "UID MAX less than GID MAX");
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if (errno || *ep != '\0' || val > UID_MAX)
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errx(1, "%s: illegal %s name", name, type);
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return (val);
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}
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static void
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chownerr(const char *file)
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{
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static uid_t euid = -1;
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static int ngroups = -1;
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static long ngroups_max;
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gid_t *groups;
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/* Check for chown without being root. */
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if (errno != EPERM || (uid != (uid_t)-1 &&
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euid == (uid_t)-1 && (euid = geteuid()) != 0)) {
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warn("%s", file);
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return;
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}
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/* Check group membership; kernel just returns EPERM. */
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if (gid != (gid_t)-1 && ngroups == -1 &&
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euid == (uid_t)-1 && (euid = geteuid()) != 0) {
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ngroups_max = sysconf(_SC_NGROUPS_MAX) + 1;
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if ((groups = malloc(sizeof(gid_t) * ngroups_max)) == NULL)
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err(1, "malloc");
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ngroups = getgroups(ngroups_max, groups);
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while (--ngroups >= 0 && gid != groups[ngroups]);
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free(groups);
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if (ngroups < 0) {
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warnx("you are not a member of group %s", gname);
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return;
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}
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}
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warn("%s", file);
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}
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static void
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usage(void)
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{
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if (ischown)
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(void)fprintf(stderr, "%s\n%s\n",
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"usage: chown [-fhvx] [-R [-H | -L | -P]] owner[:group]"
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" file ...",
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" chown [-fhvx] [-R [-H | -L | -P]] :group file ...");
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else
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(void)fprintf(stderr, "%s\n",
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"usage: chgrp [-fhvx] [-R [-H | -L | -P]] group file ...");
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exit(1);
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}
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static void
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print_info(const FTSENT *p, int vflag)
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{
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printf("%s", p->fts_path);
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if (vflag > 1) {
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if (ischown) {
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printf(": %ju:%ju -> %ju:%ju",
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(uintmax_t)p->fts_statp->st_uid,
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(uintmax_t)p->fts_statp->st_gid,
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(uid == (uid_t)-1) ?
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(uintmax_t)p->fts_statp->st_uid : (uintmax_t)uid,
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(gid == (gid_t)-1) ?
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(uintmax_t)p->fts_statp->st_gid : (uintmax_t)gid);
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} else {
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printf(": %ju -> %ju", (uintmax_t)p->fts_statp->st_gid,
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(gid == (gid_t)-1) ?
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(uintmax_t)p->fts_statp->st_gid : (uintmax_t)gid);
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}
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}
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printf("\n");
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}
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