Merge branch 'vendor/GMP' into gcc441
[dragonfly.git] / usr.sbin / chown / chown.c
CommitLineData
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1/*
2 * Copyright (c) 1988, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
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32 *
33 * @(#) Copyright (c) 1988, 1993, 1994 The Regents of the University of California. All rights reserved.
34 * @(#)chown.c 8.8 (Berkeley) 4/4/94
35 * $FreeBSD: src/usr.sbin/chown/chown.c,v 1.15.2.3 2002/08/07 21:24:33 schweikh Exp $
71126e33 36 * $DragonFly: src/usr.sbin/chown/chown.c,v 1.8 2004/12/18 22:48:02 swildner Exp $
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37 */
38
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39#include <sys/param.h>
40#include <sys/stat.h>
41
42#include <ctype.h>
43#include <dirent.h>
44#include <err.h>
45#include <errno.h>
46#include <fts.h>
47#include <grp.h>
48#include <pwd.h>
49#include <stdio.h>
50#include <stdlib.h>
51#include <string.h>
52#include <unistd.h>
53
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54static void a_gid(char *);
55static void a_uid(char *);
56static void chownerr(const char *);
57static uid_t id(const char *, const char *);
58static void usage(void);
984263bc 59
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60static uid_t uid;
61static gid_t gid;
62static int Rflag, ischown, fflag, vflag;
63static char *gname, *myname;
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64
65int
9dd6ab89 66main(int argc, char **argv)
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67{
68 FTS *ftsp;
69 FTSENT *p;
70 int Hflag, Lflag, Pflag, ch, fts_options, hflag, rval;
71 char *cp;
72
17b61719 73 myname = (cp = strrchr(*argv, '/')) ? cp + 1 : *argv;
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74 ischown = myname[2] == 'o';
75
76 Hflag = Lflag = Pflag = hflag = vflag = 0;
77 while ((ch = getopt(argc, argv, "HLPRfhv")) != -1)
78 switch (ch) {
79 case 'H':
80 Hflag = 1;
81 Lflag = Pflag = 0;
82 break;
83 case 'L':
84 Lflag = 1;
85 Hflag = Pflag = 0;
86 break;
87 case 'P':
88 Pflag = 1;
89 Hflag = Lflag = 0;
90 break;
91 case 'R':
92 Rflag = 1;
93 break;
94 case 'f':
95 fflag = 1;
96 break;
97 case 'h':
98 hflag = 1;
99 break;
100 case 'v':
5362a783 101 vflag++;
984263bc 102 break;
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103 default:
104 usage();
105 }
106 argv += optind;
107 argc -= optind;
108
109 if (argc < 2)
110 usage();
111
112 fts_options = FTS_PHYSICAL;
113 if (Rflag) {
114 if (hflag && (Lflag || Hflag))
115 errx(1, "the -R and -h options may not be specified together");
116 if (Hflag)
117 fts_options |= FTS_COMFOLLOW;
118 if (Lflag) {
119 fts_options &= ~FTS_PHYSICAL;
120 fts_options |= FTS_LOGICAL;
121 }
122 }
123
124 uid = gid = -1;
125 if (ischown) {
126 if ((cp = strchr(*argv, ':')) != NULL) {
127 *cp++ = '\0';
128 a_gid(cp);
129 }
130#ifdef SUPPORT_DOT
131 else if ((cp = strchr(*argv, '.')) != NULL) {
132 warnx("separation of user and group with a period is deprecated");
133 *cp++ = '\0';
134 a_gid(cp);
135 }
136#endif
137 a_uid(*argv);
138 } else
139 a_gid(*argv);
140
141 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
142 err(1, NULL);
143
144 for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
145 switch (p->fts_info) {
146 case FTS_D: /* Change it at FTS_DP. */
147 if (!Rflag)
148 fts_set(ftsp, p, FTS_SKIP);
149 continue;
150 case FTS_DNR: /* Warn, chown, continue. */
151 warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
152 rval = 1;
153 break;
154 case FTS_ERR: /* Warn, continue. */
155 case FTS_NS:
156 warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
157 rval = 1;
158 continue;
159 case FTS_SL: /* Ignore. */
160 case FTS_SLNONE:
161 /*
162 * The only symlinks that end up here are ones that
163 * don't point to anything and ones that we found
164 * doing a physical walk.
165 */
166 if (hflag)
167 break;
168 else
169 continue;
170 default:
171 break;
172 }
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173 if ((uid == (uid_t)(-1) || uid == p->fts_statp->st_uid) &&
174 (gid == (gid_t)(-1) || gid == p->fts_statp->st_gid))
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175 continue;
176 if (hflag) {
177 if (lchown(p->fts_accpath, uid, gid) && !fflag) {
178 chownerr(p->fts_path);
179 rval = 1;
180 } else {
181 if (vflag)
71126e33 182 printf("%s\n", p->fts_accpath);
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183 }
184 } else {
185 if (chown(p->fts_accpath, uid, gid) && !fflag) {
186 chownerr(p->fts_path);
187 rval = 1;
188 } else {
0f9fead0 189 if (vflag) {
71126e33 190 printf("%s", p->fts_accpath);
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191 if (vflag > 1) {
192 if (ischown) {
193 printf(": %d:%d -> %d:%d",
194 (int)p->fts_statp->st_uid,
195 (int)p->fts_statp->st_gid,
196 (uid == (uid_t)-1) ?
197 (int)p->fts_statp->st_uid :
198 (int)uid,
199 (gid == (gid_t)-1) ?
200 (int) p->fts_statp->st_gid :
201 (int)gid);
202 } else {
203 printf(": %d -> %d",
204 (int)p->fts_statp->st_gid,
205 (gid == (gid_t)-1) ?
206 (int)p->fts_statp->st_gid :
207 (int)gid);
208 }
209 }
210 printf("\n");
0f9fead0 211 }
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212 }
213 }
214 }
215 if (errno)
216 err(1, "fts_read");
217 exit(rval);
218}
219
5362a783 220static void
9dd6ab89 221a_gid(char *s)
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222{
223 struct group *gr;
224
225 if (*s == '\0') /* Argument was "uid[:.]". */
226 return;
227 gname = s;
228 gid = ((gr = getgrnam(s)) == NULL) ? id(s, "group") : gr->gr_gid;
229}
230
5362a783 231static void
9dd6ab89 232a_uid(char *s)
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233{
234 struct passwd *pw;
235
236 if (*s == '\0') /* Argument was "[:.]gid". */
237 return;
238 uid = ((pw = getpwnam(s)) == NULL) ? id(s, "user") : pw->pw_uid;
239}
240
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241static uid_t
242id(const char *name, const char *type)
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243{
244 u_long val;
245 char *ep;
246
247 /*
248 * XXX
249 * We know that uid_t's and gid_t's are unsigned longs.
250 */
251 errno = 0;
252 val = strtoul(name, &ep, 10);
253 if (errno)
254 err(1, "%s", name);
255 if (*ep != '\0')
256 errx(1, "%s: illegal %s name", name, type);
257 return (val);
258}
259
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260static void
261chownerr(const char *file)
984263bc 262{
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263 static uid_t euid = -1;
264 static int ngroups = -1;
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265 gid_t groups[NGROUPS];
266
267 /* Check for chown without being root. */
268 if (errno != EPERM ||
5362a783 269 (uid != (uid_t)(-1) && euid == (uid_t)(-1) && (euid = geteuid()) != 0))
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270 err(1, "%s", file);
271
272 /* Check group membership; kernel just returns EPERM. */
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273 if (gid != (gid_t)(-1) && ngroups == -1 &&
274 euid == (uid_t)(-1) && (euid = geteuid()) != 0) {
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275 ngroups = getgroups(NGROUPS, groups);
276 while (--ngroups >= 0 && gid != groups[ngroups]);
277 if (ngroups < 0)
278 errx(1, "you are not a member of group %s", gname);
279 }
280 warn("%s", file);
281}
282
5362a783 283static void
9dd6ab89 284usage(void)
984263bc 285{
71126e33 286 fprintf(stderr, "%s\n%s\n%s\n",
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287 "usage: chown [-R [-H | -L | -P]] [-f] [-h] [-v] owner[:group] file ...",
288 " chown [-R [-H | -L | -P]] [-f] [-h] [-v] :group file ...",
289 " chgrp [-R [-H | -L | -P]] [-f] [-h] [-v] group file ...");
290 exit(1);
291}