1 /* $NetBSD: chmod.c,v 1.39 2023/05/05 04:14:02 kre 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
41 static char sccsid[] = "@(#)chmod.c 8.8 (Berkeley) 4/1/94";
42 #else
43 __RCSID("$NetBSD: chmod.c,v 1.39 2023/05/05 04:14:02 kre 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
64 struct option chmod_longopts[] = {
65 { "reference", required_argument, 0,
66 1 },
67 { NULL, 0, 0,
68 0 },
69 };
70
71 int
main(int argc,char * argv[])72 main(int argc, char *argv[])
73 {
74 FTS *ftsp;
75 FTSENT *p;
76 void *set;
77 mode_t mval, nval;
78 int Hflag, Lflag, Rflag, ch, dflag, 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 = dflag = fflag = hflag = 0;
86 reference = NULL;
87 while ((ch = getopt_long(argc, argv, "HLPRXdfghorstuwx",
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 'd':
108 dflag = 1;
109 break;
110 case 'f':
111 fflag = 1;
112 break;
113 case 'h':
114 /*
115 * In System V the -h option causes chmod to
116 * change the mode of the symbolic link.
117 * 4.4BSD's symbolic links didn't have modes,
118 * so it was an undocumented noop. In NetBSD
119 * 1.3, lchmod(2) is introduced and this
120 * option does real work.
121 */
122 hflag = 1;
123 break;
124 /*
125 * XXX
126 * "-[rwx]" are valid mode commands. If they are the entire
127 * argument, getopt has moved past them, so decrement optind.
128 * Regardless, we're done argument processing.
129 */
130 case 'g': case 'o': case 'r': case 's':
131 case 't': case 'u': case 'w': case 'X': case 'x':
132 if (argv[optind - 1][0] == '-' &&
133 argv[optind - 1][1] == ch &&
134 argv[optind - 1][2] == '\0')
135 --optind;
136 goto done;
137 case '?':
138 default:
139 usage();
140 }
141 done: argv += optind;
142 argc -= optind;
143
144 if (argc == 0 || (argc == 1 && reference == NULL))
145 usage();
146
147 fts_options = FTS_PHYSICAL;
148 if (Rflag) {
149 if (hflag) {
150 errx(EXIT_FAILURE,
151 "the -R and -h options may not be specified together.");
152 /* NOTREACHED */
153 }
154 if (Hflag)
155 fts_options |= FTS_COMFOLLOW;
156 if (Lflag) {
157 fts_options &= ~FTS_PHYSICAL;
158 fts_options |= FTS_LOGICAL;
159 }
160 } else if (!hflag)
161 fts_options |= FTS_COMFOLLOW;
162 if (hflag)
163 change_mode = lchmod;
164 else
165 change_mode = chmod;
166
167 if (reference == NULL) {
168 mode = *argv++;
169 if ((set = setmode(mode)) == NULL) {
170 err(EXIT_FAILURE, "Cannot set file mode `%s'", mode);
171 /* NOTREACHED */
172 }
173 mval = 0;
174 } else {
175 struct stat st;
176
177 if (stat(reference, &st) == -1)
178 err(EXIT_FAILURE, "Cannot stat `%s'", reference);
179 mval = st.st_mode;
180 set = NULL;
181 }
182
183 if ((ftsp = fts_open(argv, fts_options, 0)) == NULL) {
184 err(EXIT_FAILURE, "fts_open");
185 /* NOTREACHED */
186 }
187 for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
188 switch (p->fts_info) {
189 case FTS_D:
190 if (!Rflag)
191 (void)fts_set(ftsp, p, FTS_SKIP);
192 break;
193 case FTS_DNR: /* Warn, chmod, continue. */
194 warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
195 rval = 1;
196 break;
197 case FTS_DP: /* Already changed at FTS_D. */
198 continue;
199 case FTS_ERR: /* Warn, continue. */
200 case FTS_NS:
201 warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
202 rval = 1;
203 continue;
204 case FTS_SL: /* Ignore. */
205 case FTS_SLNONE:
206 /*
207 * The only symlinks that end up here are ones that
208 * don't point to anything and ones that we found
209 * doing a physical walk.
210 */
211 if (!hflag)
212 continue;
213 /* else */
214 /* FALLTHROUGH */
215 default:
216 break;
217 }
218 nval = set ? getmode(set, p->fts_statp->st_mode) : mval;
219 if (dflag && nval == p->fts_statp->st_mode)
220 continue;
221 if ((*change_mode)(p->fts_accpath, nval) && !fflag) {
222 warn("%s", p->fts_path);
223 rval = 1;
224 }
225 }
226 if (errno) {
227 err(EXIT_FAILURE, "fts_read");
228 /* NOTREACHED */
229 }
230 exit(rval);
231 /* NOTREACHED */
232 }
233
234 static void
usage(void)235 usage(void)
236 {
237 (void)fprintf(stderr,
238 "Usage: %s [-R [-H | -L | -P]] [-dfh] mode file ...\n"
239 "\t%s [-R [-H | -L | -P]] [-dfh] --reference=rfile file ...\n",
240 getprogname(), getprogname());
241 exit(1);
242 /* NOTREACHED */
243 }
244