chmod.c revision 3044 
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 *	$Id$
34 */
35
36#ifndef lint
37static char copyright[] =
38"@(#) Copyright (c) 1989, 1993, 1994\n\
39	The Regents of the University of California.  All rights reserved.\n";
40#endif /* not lint */
41
42#ifndef lint
43static char sccsid[] = "@(#)chmod.c	8.8 (Berkeley) 4/1/94";
44#endif /* not lint */
45
46#include <sys/types.h>
47#include <sys/stat.h>
48
49#include <err.h>
50#include <errno.h>
51#include <fts.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55#include <unistd.h>
56
57void usage __P((void));
58
59int
60main(argc, argv)
61	int argc;
62	char *argv[];
63{
64	FTS *ftsp;
65	FTSENT *p;
66	mode_t *set;
67	long val;
68	int oct, omode;
69	int Hflag, Lflag, Pflag, Rflag, ch, fflag, fts_options, hflag, rval;
70	char *ep, *mode;
71
72	Hflag = Lflag = Pflag = Rflag = fflag = hflag = 0;
73	while ((ch = getopt(argc, argv, "HLPRXfgorstuwx")) != EOF)
74		switch (ch) {
75		case 'H':
76			Hflag = 1;
77			Lflag = Pflag = 0;
78			break;
79		case 'L':
80			Lflag = 1;
81			Hflag = Pflag = 0;
82			break;
83		case 'P':
84			Pflag = 1;
85			Hflag = Lflag = 0;
86			break;
87		case 'R':
88			Rflag = 1;
89			break;
90		case 'f':		/* XXX: undocumented. */
91			fflag = 1;
92			break;
93		case 'h':
94			/*
95			 * In System V (and probably POSIX.2) the -h option
96			 * causes chmod to change the mode of the symbolic
97			 * link.  4.4BSD's symbolic links don't have modes,
98			 * so it's an undocumented noop.  Do syntax checking,
99			 * though.
100			 */
101			hflag = 1;
102			break;
103		/*
104		 * XXX
105		 * "-[rwx]" are valid mode commands.  If they are the entire
106		 * argument, getopt has moved past them, so decrement optind.
107		 * Regardless, we're done argument processing.
108		 */
109		case 'g': case 'o': case 'r': case 's':
110		case 't': case 'u': case 'w': case 'X': case 'x':
111			if (argv[optind - 1][0] == '-' &&
112			    argv[optind - 1][1] == ch &&
113			    argv[optind - 1][2] == '\0')
114				--optind;
115			goto done;
116		case '?':
117		default:
118			usage();
119		}
120done:	argv += optind;
121	argc -= optind;
122
123	if (argc < 2)
124		usage();
125
126	fts_options = FTS_PHYSICAL;
127	if (Rflag) {
128		if (hflag)
129			errx(1,
130		"the -R and -h options may not be specified together.");
131		if (Hflag)
132			fts_options |= FTS_COMFOLLOW;
133		if (Lflag) {
134			fts_options &= ~FTS_PHYSICAL;
135			fts_options |= FTS_LOGICAL;
136		}
137	}
138
139	mode = *argv;
140	if (*mode >= '0' && *mode <= '7') {
141		errno = 0;
142		val = strtol(mode, &ep, 8);
143		if (val > INT_MAX || val < 0)
144			errno = ERANGE;
145		if (errno)
146			err(1, "invalid file mode: %s", mode);
147		if (*ep)
148			errx(1, "invalid file mode: %s", mode);
149		omode = val;
150		oct = 1;
151	} else {
152		if ((set = setmode(mode)) == NULL)
153			errx(1, "invalid file mode: %s", mode);
154		oct = 0;
155	}
156
157	if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
158		err(1, NULL);
159	for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
160		switch (p->fts_info) {
161		case FTS_D:
162			if (Rflag)		/* Change it at FTS_DP. */
163				continue;
164			fts_set(ftsp, p, FTS_SKIP);
165			break;
166		case FTS_DNR:			/* Warn, chmod, continue. */
167			warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
168			rval = 1;
169			break;
170		case FTS_ERR:			/* Warn, continue. */
171		case FTS_NS:
172			warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
173			rval = 1;
174			continue;
175		case FTS_SL:			/* Ignore. */
176		case FTS_SLNONE:
177			/*
178			 * The only symlinks that end up here are ones that
179			 * don't point to anything and ones that we found
180			 * doing a physical walk.
181			 */
182			continue;
183		default:
184			break;
185		}
186		if (chmod(p->fts_accpath, oct ? omode :
187		    getmode(set, p->fts_statp->st_mode)) && !fflag) {
188			warn(p->fts_path);
189			rval = 1;
190		}
191	}
192	if (errno)
193		err(1, "fts_read");
194	exit(rval);
195}
196
197void
198usage()
199{
200	(void)fprintf(stderr,
201	    "usage: chmod [-R [-H | -L | -P]] mode file ...\n");
202	exit(1);
203}
204