chmod.c revision 41842 
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 const 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
41#if 0
42static char sccsid[] = "@(#)chmod.c	8.8 (Berkeley) 4/1/94";
43#endif
44static const char rcsid[] =
45	"$Id: chmod.c,v 1.11 1998/05/13 07:22:11 charnier Exp $";
46#endif /* not lint */
47
48#include <sys/types.h>
49#include <sys/stat.h>
50
51#include <err.h>
52#include <errno.h>
53#include <fts.h>
54#include <limits.h>
55#include <stdio.h>
56#include <stdlib.h>
57#include <string.h>
58#include <unistd.h>
59
60void usage __P((void));
61
62int
63main(argc, argv)
64	int argc;
65	char *argv[];
66{
67	FTS *ftsp;
68	FTSENT *p;
69	mode_t *set;
70	long val;
71	int oct, omode;
72	int Hflag, Lflag, Pflag, Rflag, ch, fflag, fts_options, hflag, rval;
73	char *ep, *mode;
74
75	set = NULL;
76	omode = 0;
77	Hflag = Lflag = Pflag = Rflag = fflag = hflag = 0;
78	while ((ch = getopt(argc, argv, "HLPRXfgorstuwx")) != -1)
79		switch (ch) {
80		case 'H':
81			Hflag = 1;
82			Lflag = Pflag = 0;
83			break;
84		case 'L':
85			Lflag = 1;
86			Hflag = Pflag = 0;
87			break;
88		case 'P':
89			Pflag = 1;
90			Hflag = Lflag = 0;
91			break;
92		case 'R':
93			Rflag = 1;
94			break;
95		case 'f':		/* XXX: undocumented. */
96			fflag = 1;
97			break;
98		case 'h':
99			/*
100			 * In System V (and probably POSIX.2) the -h option
101			 * causes chmod to change the mode of the symbolic
102			 * link.  4.4BSD's symbolic links don't have modes,
103			 * so it's an undocumented noop.  Do syntax checking,
104			 * though.
105			 */
106			hflag = 1;
107			break;
108		/*
109		 * XXX
110		 * "-[rwx]" are valid mode commands.  If they are the entire
111		 * argument, getopt has moved past them, so decrement optind.
112		 * Regardless, we're done argument processing.
113		 */
114		case 'g': case 'o': case 'r': case 's':
115		case 't': case 'u': case 'w': case 'X': case 'x':
116			if (argv[optind - 1][0] == '-' &&
117			    argv[optind - 1][1] == ch &&
118			    argv[optind - 1][2] == '\0')
119				--optind;
120			goto done;
121		case '?':
122		default:
123			usage();
124		}
125done:	argv += optind;
126	argc -= optind;
127
128	if (argc < 2)
129		usage();
130
131	fts_options = FTS_PHYSICAL;
132	if (Rflag) {
133		if (hflag)
134			errx(1,
135		"the -R and -h options may not be specified together.");
136		if (Hflag)
137			fts_options |= FTS_COMFOLLOW;
138		if (Lflag) {
139			fts_options &= ~FTS_PHYSICAL;
140			fts_options |= FTS_LOGICAL;
141		}
142	}
143
144	mode = *argv;
145	if (*mode >= '0' && *mode <= '7') {
146		errno = 0;
147		val = strtol(mode, &ep, 8);
148		if (val > INT_MAX || val < 0)
149			errno = ERANGE;
150		if (errno)
151			err(1, "invalid file mode: %s", mode);
152		if (*ep)
153			errx(1, "invalid file mode: %s", mode);
154		omode = val;
155		oct = 1;
156	} else {
157		if ((set = setmode(mode)) == NULL)
158			errx(1, "invalid file mode: %s", mode);
159		oct = 0;
160	}
161
162	if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
163		err(1, NULL);
164	for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
165		switch (p->fts_info) {
166		case FTS_D:			/* Change it at FTS_DP. */
167			if (!Rflag)
168				fts_set(ftsp, p, FTS_SKIP);
169			continue;
170		case FTS_DNR:			/* Warn, chmod, continue. */
171			warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
172			rval = 1;
173			break;
174		case FTS_ERR:			/* Warn, continue. */
175		case FTS_NS:
176			warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
177			rval = 1;
178			continue;
179		case FTS_SL:			/* Ignore. */
180		case FTS_SLNONE:
181			/*
182			 * The only symlinks that end up here are ones that
183			 * don't point to anything and ones that we found
184			 * doing a physical walk.
185			 */
186			continue;
187		default:
188			break;
189		}
190		if (chmod(p->fts_accpath, oct ? omode :
191		    getmode(set, p->fts_statp->st_mode)) && !fflag) {
192			warn(p->fts_path);
193			rval = 1;
194		}
195	}
196	if (errno)
197		err(1, "fts_read");
198	free(set);
199	exit(rval);
200}
201
202void
203usage()
204{
205	(void)fprintf(stderr,
206	    "usage: chmod [-R [-H | -L | -P]] mode file ...\n");
207	exit(1);
208}
209