chmod.c revision 1556 
1/*
2 * Copyright (c) 1989, 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.
32 */
33
34#ifndef lint
35static char copyright[] =
36"@(#) Copyright (c) 1989, 1993, 1994\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41static char sccsid[] = "@(#)chmod.c	8.8 (Berkeley) 4/1/94";
42#endif /* not lint */
43
44#include <sys/types.h>
45#include <sys/stat.h>
46
47#include <err.h>
48#include <errno.h>
49#include <fts.h>
50#include <stdio.h>
51#include <stdlib.h>
52#include <string.h>
53#include <unistd.h>
54
55void usage __P((void));
56
57int
58main(argc, argv)
59	int argc;
60	char *argv[];
61{
62	FTS *ftsp;
63	FTSENT *p;
64	mode_t *set;
65	long val;
66	int oct, omode;
67	int Hflag, Lflag, Pflag, Rflag, ch, fflag, fts_options, hflag, rval;
68	char *ep, *mode;
69
70	Hflag = Lflag = Pflag = Rflag = fflag = hflag = 0;
71	while ((ch = getopt(argc, argv, "HLPRXfgorstuwx")) != EOF)
72		switch (ch) {
73		case 'H':
74			Hflag = 1;
75			Lflag = Pflag = 0;
76			break;
77		case 'L':
78			Lflag = 1;
79			Hflag = Pflag = 0;
80			break;
81		case 'P':
82			Pflag = 1;
83			Hflag = Lflag = 0;
84			break;
85		case 'R':
86			Rflag = 1;
87			break;
88		case 'f':		/* XXX: undocumented. */
89			fflag = 1;
90			break;
91		case 'h':
92			/*
93			 * In System V (and probably POSIX.2) the -h option
94			 * causes chmod to change the mode of the symbolic
95			 * link.  4.4BSD's symbolic links don't have modes,
96			 * so it's an undocumented noop.  Do syntax checking,
97			 * though.
98			 */
99			hflag = 1;
100			break;
101		/*
102		 * XXX
103		 * "-[rwx]" are valid mode commands.  If they are the entire
104		 * argument, getopt has moved past them, so decrement optind.
105		 * Regardless, we're done argument processing.
106		 */
107		case 'g': case 'o': case 'r': case 's':
108		case 't': case 'u': case 'w': case 'X': case 'x':
109			if (argv[optind - 1][0] == '-' &&
110			    argv[optind - 1][1] == ch &&
111			    argv[optind - 1][2] == '\0')
112				--optind;
113			goto done;
114		case '?':
115		default:
116			usage();
117		}
118done:	argv += optind;
119	argc -= optind;
120
121	if (argc < 2)
122		usage();
123
124	fts_options = FTS_PHYSICAL;
125	if (Rflag) {
126		if (hflag)
127			errx(1,
128		"the -R and -h options may not be specified together.");
129		if (Hflag)
130			fts_options |= FTS_COMFOLLOW;
131		if (Lflag) {
132			fts_options &= ~FTS_PHYSICAL;
133			fts_options |= FTS_LOGICAL;
134		}
135	}
136
137	mode = *argv;
138	if (*mode >= '0' && *mode <= '7') {
139		errno = 0;
140		val = strtol(mode, &ep, 8);
141		if (val > INT_MAX || val < 0)
142			errno = ERANGE;
143		if (errno)
144			err(1, "invalid file mode: %s", mode);
145		if (*ep)
146			errx(1, "invalid file mode: %s", mode);
147		omode = val;
148		oct = 1;
149	} else {
150		if ((set = setmode(mode)) == NULL)
151			errx(1, "invalid file mode: %s", mode);
152		oct = 0;
153	}
154
155	if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
156		err(1, NULL);
157	for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
158		switch (p->fts_info) {
159		case FTS_D:
160			if (Rflag)		/* Change it at FTS_DP. */
161				continue;
162			fts_set(ftsp, p, FTS_SKIP);
163			break;
164		case FTS_DNR:			/* Warn, chmod, continue. */
165			warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
166			rval = 1;
167			break;
168		case FTS_ERR:			/* Warn, continue. */
169		case FTS_NS:
170			warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
171			rval = 1;
172			continue;
173		case FTS_SL:			/* Ignore. */
174		case FTS_SLNONE:
175			/*
176			 * The only symlinks that end up here are ones that
177			 * don't point to anything and ones that we found
178			 * doing a physical walk.
179			 */
180			continue;
181		default:
182			break;
183		}
184		if (chmod(p->fts_accpath, oct ? omode :
185		    getmode(set, p->fts_statp->st_mode)) && !fflag) {
186			warn(p->fts_path);
187			rval = 1;
188		}
189	}
190	if (errno)
191		err(1, "fts_read");
192	exit(rval);
193}
194
195void
196usage()
197{
198	(void)fprintf(stderr,
199	    "usage: chmod [-R [-H | -L | -P]] mode file ...\n");
200	exit(1);
201}
202