1/* $NetBSD: chmod.c,v 1.38 2012/10/22 18:00:46 christos Exp $ */
2
3/*
4 * Copyright (c) 1989, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34__COPYRIGHT(
35"@(#) Copyright (c) 1989, 1993, 1994\
36 The Regents of the University of California. All rights reserved.");
37#endif /* not lint */
38
39#ifndef lint
40#if 0
41static char sccsid[] = "@(#)chmod.c 8.8 (Berkeley) 4/1/94";
42#else
43__RCSID("$NetBSD: chmod.c,v 1.38 2012/10/22 18:00:46 christos Exp $");
44#endif
45#endif /* not lint */
46
47#include <sys/param.h>
48#include <sys/stat.h>
49#include <sys/types.h>
50
51#include <err.h>
52#include <errno.h>
53#include <fts.h>
54#include <limits.h>
55#include <locale.h>
56#include <stdio.h>
57#include <stdlib.h>
58#include <string.h>
59#include <unistd.h>
60#include <getopt.h>
61
62__dead static void usage(void);
63
64struct option chmod_longopts[] = {
65 { "reference", required_argument, 0,
66 1 },
67 { NULL, 0, 0,
68 0 },
69};
70
71int
72main(int argc, char *argv[])
73{
74 FTS *ftsp;
75 FTSENT *p;
76 void *set;
77 mode_t mval;
78 int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval;
79 char *mode, *reference;
80 int (*change_mode)(const char *, mode_t);
81
82 setprogname(argv[0]);
83 (void)setlocale(LC_ALL, "");
84
85 Hflag = Lflag = Rflag = fflag = hflag = 0;
86 reference = NULL;
87 while ((ch = getopt_long(argc, argv, "HLPRXfghorstuwx",
88 chmod_longopts, NULL)) != -1)
89 switch (ch) {
90 case 1:
91 reference = optarg;
92 break;
93 case 'H':
94 Hflag = 1;
95 Lflag = 0;
96 break;
97 case 'L':
98 Lflag = 1;
99 Hflag = 0;
100 break;
101 case 'P':
102 Hflag = Lflag = 0;
103 break;
104 case 'R':
105 Rflag = 1;
106 break;
107 case 'f':
108 fflag = 1;
109 break;
110 case 'h':
111 /*
112 * In System V the -h option causes chmod to
113 * change the mode of the symbolic link.
114 * 4.4BSD's symbolic links didn't have modes,
115 * so it was an undocumented noop. In NetBSD
116 * 1.3, lchmod(2) is introduced and this
117 * option does real work.
118 */
119 hflag = 1;
120 break;
121 /*
122 * XXX
123 * "-[rwx]" are valid mode commands. If they are the entire
124 * argument, getopt has moved past them, so decrement optind.
125 * Regardless, we're done argument processing.
126 */
127 case 'g': case 'o': case 'r': case 's':
128 case 't': case 'u': case 'w': case 'X': case 'x':
129 if (argv[optind - 1][0] == '-' &&
130 argv[optind - 1][1] == ch &&
131 argv[optind - 1][2] == '\0')
132 --optind;
133 goto done;
134 case '?':
135 default:
136 usage();
137 }
138done: argv += optind;
139 argc -= optind;
140
141 if (argc == 0 || (argc == 1 && reference == NULL))
142 usage();
143
144 fts_options = FTS_PHYSICAL;
145 if (Rflag) {
146 if (hflag) {
147 errx(EXIT_FAILURE,
148 "the -R and -h options may not be specified together.");
149 /* NOTREACHED */
150 }
151 if (Hflag)
152 fts_options |= FTS_COMFOLLOW;
153 if (Lflag) {
154 fts_options &= ~FTS_PHYSICAL;
155 fts_options |= FTS_LOGICAL;
156 }
157 } else if (!hflag)
158 fts_options |= FTS_COMFOLLOW;
159 if (hflag)
160 change_mode = lchmod;
161 else
162 change_mode = chmod;
163
164 if (reference == NULL) {
165 mode = *argv++;
166 if ((set = setmode(mode)) == NULL) {
167 err(EXIT_FAILURE, "Cannot set file mode `%s'", mode);
168 /* NOTREACHED */
169 }
170 mval = 0;
171 } else {
172 struct stat st;
173
174 if (stat(reference, &st) == -1)
175 err(EXIT_FAILURE, "Cannot stat `%s'", reference);
176 mval = st.st_mode;
177 set = NULL;
178 }
179
180 if ((ftsp = fts_open(argv, fts_options, 0)) == NULL) {
181 err(EXIT_FAILURE, "fts_open");
182 /* NOTREACHED */
183 }
184 for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
185 switch (p->fts_info) {
186 case FTS_D:
187 if (!Rflag)
188 (void)fts_set(ftsp, p, FTS_SKIP);
189 break;
190 case FTS_DNR: /* Warn, chmod, continue. */
191 warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
192 rval = 1;
193 break;
194 case FTS_DP: /* Already changed at FTS_D. */
195 continue;
196 case FTS_ERR: /* Warn, continue. */
197 case FTS_NS:
198 warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
199 rval = 1;
200 continue;
201 case FTS_SL: /* Ignore. */
202 case FTS_SLNONE:
203 /*
204 * The only symlinks that end up here are ones that
205 * don't point to anything and ones that we found
206 * doing a physical walk.
207 */
208 if (!hflag)
209 continue;
210 /* else */
211 /* FALLTHROUGH */
212 default:
213 break;
214 }
215 if ((*change_mode)(p->fts_accpath,
216 set ? getmode(set, p->fts_statp->st_mode) : mval)
217 && !fflag) {
218 warn("%s", p->fts_path);
219 rval = 1;
220 }
221 }
222 if (errno) {
223 err(EXIT_FAILURE, "fts_read");
224 /* NOTREACHED */
225 }
226 exit(rval);
227 /* NOTREACHED */
228}
229
230static void
231usage(void)
232{
233 (void)fprintf(stderr,
234 "Usage: %s [-R [-H | -L | -P]] [-fh] mode file ...\n"
235 "\t%s [-R [-H | -L | -P]] [-fh] --reference=rfile file ...\n",
236 getprogname(), getprogname());
237 exit(1);
238 /* NOTREACHED */
239}
240