1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1992, 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/types.h>
33#include <sys/stat.h>
34
35#include <err.h>
36#include <errno.h>
37#include <fcntl.h>
38#include <fts.h>
39#include <signal.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <unistd.h>
44
45static volatile sig_atomic_t siginfo;
46
47static void usage(void) __dead2;
48
49static void
50siginfo_handler(int sig __unused)
51{
52
53	siginfo = 1;
54}
55
56int
57main(int argc, char *argv[])
58{
59	FTS *ftsp;
60	FTSENT *p;
61	u_long clear, newflags, set;
62	long val;
63	int Hflag, Lflag, Rflag, fflag, hflag, vflag, xflag;
64	int ch, e, fts_options, oct, rval;
65	char *flags, *ep;
66
67	Hflag = Lflag = Rflag = fflag = hflag = vflag = xflag = 0;
68	while ((ch = getopt(argc, argv, "HLPRfhvx")) != -1)
69		switch (ch) {
70		case 'H':
71			Hflag = 1;
72			Lflag = 0;
73			break;
74		case 'L':
75			Lflag = 1;
76			Hflag = 0;
77			break;
78		case 'P':
79			Hflag = Lflag = 0;
80			break;
81		case 'R':
82			Rflag = 1;
83			break;
84		case 'f':
85			fflag = 1;
86			break;
87		case 'h':
88			hflag = 1;
89			break;
90		case 'v':
91			vflag++;
92			break;
93		case 'x':
94			xflag = 1;
95			break;
96		case '?':
97		default:
98			usage();
99		}
100	argv += optind;
101	argc -= optind;
102
103	if (argc < 2)
104		usage();
105
106	(void)signal(SIGINFO, siginfo_handler);
107
108	if (Rflag) {
109		if (hflag)
110			errx(1, "the -R and -h options may not be "
111			    "specified together.");
112		if (Lflag) {
113			fts_options = FTS_LOGICAL;
114		} else {
115			fts_options = FTS_PHYSICAL;
116
117			if (Hflag) {
118				fts_options |= FTS_COMFOLLOW;
119			}
120		}
121	} else if (hflag) {
122		fts_options = FTS_PHYSICAL;
123	} else {
124		fts_options = FTS_LOGICAL;
125	}
126	if (xflag)
127		fts_options |= FTS_XDEV;
128
129	flags = *argv;
130	if (*flags >= '0' && *flags <= '7') {
131		errno = 0;
132		val = strtol(flags, &ep, 8);
133		if (val < 0)
134			errno = ERANGE;
135		if (errno)
136                        err(1, "invalid flags: %s", flags);
137                if (*ep)
138                        errx(1, "invalid flags: %s", flags);
139		set = val;
140                oct = 1;
141	} else {
142		if (strtofflags(&flags, &set, &clear))
143                        errx(1, "invalid flag: %s", flags);
144		clear = ~clear;
145		oct = 0;
146	}
147
148	if ((ftsp = fts_open(++argv, fts_options , 0)) == NULL)
149		err(1, NULL);
150
151	for (rval = 0; errno = 0, (p = fts_read(ftsp)) != NULL;) {
152		int atflag;
153
154		if ((fts_options & FTS_LOGICAL) ||
155		    ((fts_options & FTS_COMFOLLOW) &&
156		    p->fts_level == FTS_ROOTLEVEL))
157			atflag = 0;
158		else
159			atflag = AT_SYMLINK_NOFOLLOW;
160
161		switch (p->fts_info) {
162		case FTS_D:	/* Change it at FTS_DP if we're recursive. */
163			if (!Rflag)
164				fts_set(ftsp, p, FTS_SKIP);
165			continue;
166		case FTS_DNR:			/* Warn, chflags. */
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		default:
176			break;
177		}
178		if (oct)
179			newflags = set;
180		else
181			newflags = (p->fts_statp->st_flags | set) & clear;
182		if (newflags == p->fts_statp->st_flags)
183			continue;
184		if (chflagsat(AT_FDCWD, p->fts_accpath, newflags,
185		    atflag) == -1) {
186			e = errno;
187			if (!fflag) {
188				warnc(e, "%s", p->fts_path);
189				rval = 1;
190			}
191			if (siginfo) {
192				(void)printf("%s: %s\n", p->fts_path,
193				    strerror(e));
194				siginfo = 0;
195			}
196		} else if (vflag || siginfo) {
197			(void)printf("%s", p->fts_path);
198			if (vflag > 1 || siginfo)
199				(void)printf(": 0%lo -> 0%lo",
200				    (u_long)p->fts_statp->st_flags,
201				    newflags);
202			(void)printf("\n");
203			siginfo = 0;
204		}
205	}
206	if (errno)
207		err(1, "fts_read");
208	exit(rval);
209}
210
211static void
212usage(void)
213{
214	(void)fprintf(stderr,
215	    "usage: chflags [-fhvx] [-R [-H | -L | -P]] flags file ...\n");
216	exit(1);
217}
218