2 * Copyright (c) 1988, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#) Copyright (c) 1988, 1993, 1994 The Regents of the University of California. All rights reserved.
30 * @(#)chown.c 8.8 (Berkeley) 4/4/94
31 * $FreeBSD: head/usr.sbin/chown/chown.c 282208 2015-04-29 00:49:00Z smh $
34 #include <sys/param.h>
50 static void a_gid(const char *);
51 static void a_uid(const char *);
52 static void chownerr(const char *);
53 static uid_t id(const char *, const char *);
54 static void usage(void);
59 static const char *gname;
62 main(int argc, char **argv)
66 int Hflag, Lflag, Rflag, fflag, hflag, vflag, xflag;
67 int ch, fts_options, rval;
70 ischown = (strcmp(basename(argv[0]), "chown") == 0);
72 Hflag = Lflag = Rflag = fflag = hflag = vflag = xflag = 0;
73 while ((ch = getopt(argc, argv, "HLPRfhvx")) != -1)
111 if (hflag && (Hflag || Lflag))
112 errx(1, "the -R%c and -h options may not be "
113 "specified together", Hflag ? 'H' : 'L');
115 fts_options = FTS_LOGICAL;
117 fts_options = FTS_PHYSICAL;
120 fts_options |= FTS_COMFOLLOW;
124 fts_options = FTS_PHYSICAL;
126 fts_options = FTS_LOGICAL;
130 fts_options |= FTS_XDEV;
135 if ((cp = strchr(*argv, ':')) != NULL) {
140 else if ((cp = strchr(*argv, '.')) != NULL) {
141 warnx("separation of user and group with a period is deprecated");
150 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
153 for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
156 if ((fts_options & FTS_LOGICAL) ||
157 ((fts_options & FTS_COMFOLLOW) &&
158 p->fts_level == FTS_ROOTLEVEL))
161 atflag = AT_SYMLINK_NOFOLLOW;
163 switch (p->fts_info) {
164 case FTS_D: /* Change it at FTS_DP. */
166 fts_set(ftsp, p, FTS_SKIP);
168 case FTS_DNR: /* Warn, chown. */
169 warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
172 case FTS_ERR: /* Warn, continue. */
174 warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
180 if ((uid == (uid_t)(-1) || uid == p->fts_statp->st_uid) &&
181 (gid == (gid_t)(-1) || gid == p->fts_statp->st_gid))
183 if (fchownat(AT_FDCWD, p->fts_accpath, uid, gid, atflag)
185 chownerr(p->fts_path);
188 printf("%s", p->fts_path);
191 printf(": %ju:%ju -> %ju:%ju",
193 p->fts_statp->st_uid,
195 p->fts_statp->st_gid,
196 (uid == (uid_t)(-1)) ?
198 p->fts_statp->st_uid :
200 (gid == (gid_t)(-1)) ?
202 p->fts_statp->st_gid :
205 printf(": %ju -> %ju",
207 p->fts_statp->st_gid,
208 (gid == (gid_t)(-1)) ?
210 p->fts_statp->st_gid :
227 if (*s == '\0') /* Argument was "uid[:.]". */
230 gid = ((gr = getgrnam(s)) != NULL) ? gr->gr_gid : id(s, "group");
238 if (*s == '\0') /* Argument was "[:.]gid". */
240 uid = ((pw = getpwnam(s)) != NULL) ? pw->pw_uid : id(s, "user");
244 id(const char *name, const char *type)
251 * We know that uid_t's and gid_t's are unsigned longs.
254 val = strtoul(name, &ep, 10);
255 if (errno || *ep != '\0')
256 errx(1, "%s: illegal %s name", name, type);
261 chownerr(const char *file)
263 static uid_t euid = -1;
264 static int ngroups = -1;
265 static long ngroups_max;
268 /* Check for chown without being root. */
269 if (errno != EPERM || (uid != (uid_t)(-1) &&
270 euid == (uid_t)(-1) && (euid = geteuid()) != 0)) {
275 /* Check group membership; kernel just returns EPERM. */
276 if (gid != (gid_t)(-1) && ngroups == -1 &&
277 euid == (uid_t)(-1) && (euid = geteuid()) != 0) {
278 ngroups_max = sysconf(_SC_NGROUPS_MAX) + 1;
279 if ((groups = malloc(sizeof(gid_t) * ngroups_max)) == NULL)
281 ngroups = getgroups(ngroups_max, groups);
282 while (--ngroups >= 0 && gid != groups[ngroups]);
285 warnx("you are not a member of group %s", gname);
297 fprintf(stderr, "%s\n%s\n",
298 "usage: chown [-fhvx] [-R [-H | -L | -P]] owner[:group]"
300 " chown [-fhvx] [-R [-H | -L | -P]] :group file ...");
302 fprintf(stderr, "%s\n",
303 "usage: chgrp [-fhvx] [-R [-H | -L | -P]] group file ...");