1/* $NetBSD: chmod.c,v 1.35 2010/01/22 05:41:36 snj 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
41static char sccsid[] = "@(#)chmod.c	8.8 (Berkeley) 4/1/94";
42#else
43__RCSID("$NetBSD: chmod.c,v 1.35 2010/01/22 05:41:36 snj 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
61__dead static void	usage(void);
62
63int
64main(int argc, char *argv[])
65{
66	FTS *ftsp;
67	FTSENT *p;
68	mode_t *set;
69	int Hflag, Lflag, Rflag, ch, fflag, fts_options, hflag, rval;
70	char *mode;
71	int (*change_mode)(const char *, mode_t);
72
73	setprogname(argv[0]);
74	(void)setlocale(LC_ALL, "");
75
76	Hflag = Lflag = Rflag = fflag = hflag = 0;
77	while ((ch = getopt(argc, argv, "HLPRXfghorstuwx")) != -1)
78		switch (ch) {
79		case 'H':
80			Hflag = 1;
81			Lflag = 0;
82			break;
83		case 'L':
84			Lflag = 1;
85			Hflag = 0;
86			break;
87		case 'P':
88			Hflag = Lflag = 0;
89			break;
90		case 'R':
91			Rflag = 1;
92			break;
93		case 'f':
94			fflag = 1;
95			break;
96		case 'h':
97			/*
98			 * In System V the -h option causes chmod to
99			 * change the mode of the symbolic link.
100			 * 4.4BSD's symbolic links didn't have modes,
101			 * so it was an undocumented noop.  In NetBSD
102			 * 1.3, lchmod(2) is introduced and this
103			 * option does real work.
104			 */
105			hflag = 1;
106			break;
107		/*
108		 * XXX
109		 * "-[rwx]" are valid mode commands.  If they are the entire
110		 * argument, getopt has moved past them, so decrement optind.
111		 * Regardless, we're done argument processing.
112		 */
113		case 'g': case 'o': case 'r': case 's':
114		case 't': case 'u': case 'w': case 'X': case 'x':
115			if (argv[optind - 1][0] == '-' &&
116			    argv[optind - 1][1] == ch &&
117			    argv[optind - 1][2] == '\0')
118				--optind;
119			goto done;
120		case '?':
121		default:
122			usage();
123		}
124done:	argv += optind;
125	argc -= optind;
126
127	if (argc < 2)
128		usage();
129
130	fts_options = FTS_PHYSICAL;
131	if (Rflag) {
132		if (hflag) {
133			errx(EXIT_FAILURE,
134		"the -R and -h options may not be specified together.");
135			/* NOTREACHED */
136		}
137		if (Hflag)
138			fts_options |= FTS_COMFOLLOW;
139		if (Lflag) {
140			fts_options &= ~FTS_PHYSICAL;
141			fts_options |= FTS_LOGICAL;
142		}
143	} else if (!hflag)
144		fts_options |= FTS_COMFOLLOW;
145	if (hflag)
146		change_mode = lchmod;
147	else
148		change_mode = chmod;
149
150	mode = *argv;
151	if ((set = setmode(mode)) == NULL) {
152		err(EXIT_FAILURE, "Cannot set file mode `%s'", mode);
153		/* NOTREACHED */
154	}
155
156	if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) {
157		err(EXIT_FAILURE, "fts_open");
158		/* NOTREACHED */
159	}
160	for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
161		switch (p->fts_info) {
162		case FTS_D:
163			if (!Rflag)
164				(void)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_DP:			/* Already changed at FTS_D. */
171			continue;
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			if (!hflag)
185				continue;
186			/* else */
187			/* FALLTHROUGH */
188		default:
189			break;
190		}
191		if ((*change_mode)(p->fts_accpath,
192		    getmode(set, p->fts_statp->st_mode)) && !fflag) {
193			warn("%s", p->fts_path);
194			rval = 1;
195		}
196	}
197	if (errno) {
198		err(EXIT_FAILURE, "fts_read");
199		/* NOTREACHED */
200	}
201	exit(rval);
202	/* NOTREACHED */
203}
204
205static void
206usage(void)
207{
208	(void)fprintf(stderr,
209	    "usage: %s [-R [-H | -L | -P]] [-fh] mode file ...\n",
210	    getprogname());
211	exit(1);
212	/* NOTREACHED */
213}
214