284 lines
6.7 KiB
C
284 lines
6.7 KiB
C
/*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1988, 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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#if 0
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static char sccsid[] = "@(#)chown.c 8.8 (Berkeley) 4/4/94";
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#endif
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#endif /* not lint */
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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 <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 <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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void a_gid(const char *);
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void a_uid(const char *);
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void chownerr(const char *);
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u_long id(const char *, const char *);
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void usage(void);
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uid_t uid;
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gid_t gid;
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int ischown;
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const char *gname;
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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;
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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 = 0;
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while ((ch = getopt(argc, argv, "HLPRfhv")) != -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 = 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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if (Rflag) {
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fts_options = FTS_PHYSICAL;
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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 (Hflag)
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fts_options |= FTS_COMFOLLOW;
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else if (Lflag) {
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fts_options &= ~FTS_PHYSICAL;
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fts_options |= FTS_LOGICAL;
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}
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} else
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fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL;
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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, 0)) == NULL)
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err(1, NULL);
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for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
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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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case FTS_SL:
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case FTS_SLNONE:
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/*
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* The only symlinks that end up here are ones that
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* don't point to anything and ones that we found
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* doing a physical walk.
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*/
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if (hflag)
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break;
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else
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continue;
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default:
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break;
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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 ((hflag ? lchown : chown)(p->fts_accpath, uid, gid) == -1) {
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if (!fflag) {
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chownerr(p->fts_path);
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rval = 1;
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}
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} else {
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if (vflag)
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printf("%s\n", p->fts_path);
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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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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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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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u_long
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id(const char *name, const char *type)
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{
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u_long val;
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char *ep;
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/*
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* XXX
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* We know that uid_t's and gid_t's are unsigned longs.
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*/
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errno = 0;
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val = strtoul(name, &ep, 10);
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if (errno)
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err(1, "%s", name);
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if (*ep != '\0')
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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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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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gid_t groups[NGROUPS_MAX];
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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 = getgroups(NGROUPS_MAX, groups);
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while (--ngroups >= 0 && gid != groups[ngroups]);
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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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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 [-fhv] [-R [-H | -L | -P]] owner[:group]"
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" file ...",
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" chown [-fhv] [-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 [-fhv] [-R [-H | -L | -P]] group file ...");
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exit(1);
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}
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