chmod.c revision 17496 
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: chmod.c,v 1.4 1995/03/19 13:27:43 joerg Exp $
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 <limits.h>
53#include <stdio.h>
54#include <stdlib.h>
55#include <string.h>
56#include <unistd.h>
57
58void usage __P((void));
59
60int
61main(argc, argv)
62	int argc;
63	char *argv[];
64{
65	FTS *ftsp;
66	FTSENT *p;
67	mode_t *set;
68	long val;
69	int oct, omode;
70	int Hflag, Lflag, Pflag, Rflag, ch, fflag, fts_options, hflag, rval;
71	char *ep, *mode;
72
73	set = NULL;
74	omode = 0;
75	Hflag = Lflag = Pflag = Rflag = fflag = hflag = 0;
76	while ((ch = getopt(argc, argv, "HLPRXfgorstuwx")) != EOF)
77		switch (ch) {
78		case 'H':
79			Hflag = 1;
80			Lflag = Pflag = 0;
81			break;
82		case 'L':
83			Lflag = 1;
84			Hflag = Pflag = 0;
85			break;
86		case 'P':
87			Pflag = 1;
88			Hflag = Lflag = 0;
89			break;
90		case 'R':
91			Rflag = 1;
92			break;
93		case 'f':		/* XXX: undocumented. */
94			fflag = 1;
95			break;
96		case 'h':
97			/*
98			 * In System V (and probably POSIX.2) the -h option
99			 * causes chmod to change the mode of the symbolic
100			 * link.  4.4BSD's symbolic links don't have modes,
101			 * so it's an undocumented noop.  Do syntax checking,
102			 * though.
103			 */
104			hflag = 1;
105			break;
106		/*
107		 * XXX
108		 * "-[rwx]" are valid mode commands.  If they are the entire
109		 * argument, getopt has moved past them, so decrement optind.
110		 * Regardless, we're done argument processing.
111		 */
112		case 'g': case 'o': case 'r': case 's':
113		case 't': case 'u': case 'w': case 'X': case 'x':
114			if (argv[optind - 1][0] == '-' &&
115			    argv[optind - 1][1] == ch &&
116			    argv[optind - 1][2] == '\0')
117				--optind;
118			goto done;
119		case '?':
120		default:
121			usage();
122		}
123done:	argv += optind;
124	argc -= optind;
125
126	if (argc < 2)
127		usage();
128
129	fts_options = FTS_PHYSICAL;
130	if (Rflag) {
131		if (hflag)
132			errx(1,
133		"the -R and -h options may not be specified together.");
134		if (Hflag)
135			fts_options |= FTS_COMFOLLOW;
136		if (Lflag) {
137			fts_options &= ~FTS_PHYSICAL;
138			fts_options |= FTS_LOGICAL;
139		}
140	}
141
142	mode = *argv;
143	if (*mode >= '0' && *mode <= '7') {
144		errno = 0;
145		val = strtol(mode, &ep, 8);
146		if (val > INT_MAX || val < 0)
147			errno = ERANGE;
148		if (errno)
149			err(1, "invalid file mode: %s", mode);
150		if (*ep)
151			errx(1, "invalid file mode: %s", mode);
152		omode = val;
153		oct = 1;
154	} else {
155		if ((set = setmode(mode)) == NULL)
156			errx(1, "invalid file mode: %s", mode);
157		oct = 0;
158	}
159
160	if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL)
161		err(1, NULL);
162	for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
163		switch (p->fts_info) {
164		case FTS_D:			/* Change it at FTS_DP. */
165			if (!Rflag)
166				fts_set(ftsp, p, FTS_SKIP);
167			continue;
168		case FTS_DNR:			/* Warn, chmod, continue. */
169			warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
170			rval = 1;
171			break;
172		case FTS_ERR:			/* Warn, continue. */
173		case FTS_NS:
174			warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
175			rval = 1;
176			continue;
177		case FTS_SL:			/* Ignore. */
178		case FTS_SLNONE:
179			/*
180			 * The only symlinks that end up here are ones that
181			 * don't point to anything and ones that we found
182			 * doing a physical walk.
183			 */
184			continue;
185		default:
186			break;
187		}
188		if (chmod(p->fts_accpath, oct ? omode :
189		    getmode(set, p->fts_statp->st_mode)) && !fflag) {
190			warn(p->fts_path);
191			rval = 1;
192		}
193	}
194	if (errno)
195		err(1, "fts_read");
196	exit(rval);
197}
198
199void
200usage()
201{
202	(void)fprintf(stderr,
203	    "usage: chmod [-R [-H | -L | -P]] mode file ...\n");
204	exit(1);
205}
206