setfacl.c revision 204819 
1/*-
2 * Copyright (c) 2001 Chris D. Faulhaber
3 * 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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/bin/setfacl/setfacl.c 204819 2010-03-07 07:59:05Z joel $");
29
30#include <sys/types.h>
31#include <sys/param.h>
32#include <sys/stat.h>
33#include <sys/acl.h>
34#include <sys/queue.h>
35
36#include <err.h>
37#include <errno.h>
38#include <stdio.h>
39#include <stdlib.h>
40#include <string.h>
41#include <unistd.h>
42
43#include "setfacl.h"
44
45static void	add_filename(const char *filename);
46static void	usage(void);
47
48static void
49add_filename(const char *filename)
50{
51	struct sf_file *file;
52
53	if (strlen(filename) > PATH_MAX - 1) {
54		warn("illegal filename");
55		return;
56	}
57	file = zmalloc(sizeof(struct sf_file));
58	file->filename = filename;
59	TAILQ_INSERT_TAIL(&filelist, file, next);
60}
61
62static void
63usage(void)
64{
65
66	fprintf(stderr, "usage: setfacl [-bdhkn] [-a position entries] "
67	    "[-m entries] [-M file] [-x entries] [-X file] [file ...]\n");
68	exit(1);
69}
70
71int
72main(int argc, char *argv[])
73{
74	acl_t acl;
75	acl_type_t acl_type;
76	char filename[PATH_MAX];
77	int local_error, carried_error, ch, i, entry_number, ret;
78	int h_flag;
79	struct sf_file *file;
80	struct sf_entry *entry;
81	const char *fn_dup;
82	char *end;
83	struct stat sb;
84
85	acl_type = ACL_TYPE_ACCESS;
86	carried_error = local_error = 0;
87	h_flag = have_mask = have_stdin = n_flag = need_mask = 0;
88
89	TAILQ_INIT(&entrylist);
90	TAILQ_INIT(&filelist);
91
92	while ((ch = getopt(argc, argv, "M:X:a:bdhkm:nx:")) != -1)
93		switch(ch) {
94		case 'M':
95			entry = zmalloc(sizeof(struct sf_entry));
96			entry->acl = get_acl_from_file(optarg);
97			if (entry->acl == NULL)
98				err(1, "%s: get_acl_from_file() failed", optarg);
99			entry->op = OP_MERGE_ACL;
100			TAILQ_INSERT_TAIL(&entrylist, entry, next);
101			break;
102		case 'X':
103			entry = zmalloc(sizeof(struct sf_entry));
104			entry->acl = get_acl_from_file(optarg);
105			entry->op = OP_REMOVE_ACL;
106			TAILQ_INSERT_TAIL(&entrylist, entry, next);
107			break;
108		case 'a':
109			entry = zmalloc(sizeof(struct sf_entry));
110
111			entry_number = strtol(optarg, &end, 10);
112			if (end - optarg != (int)strlen(optarg))
113				errx(1, "%s: invalid entry number", optarg);
114			if (entry_number < 0)
115				errx(1, "%s: entry number cannot be less than zero", optarg);
116			entry->entry_number = entry_number;
117
118			if (argv[optind] == NULL)
119				errx(1, "missing ACL");
120			entry->acl = acl_from_text(argv[optind]);
121			if (entry->acl == NULL)
122				err(1, "%s", argv[optind]);
123			optind++;
124			entry->op = OP_ADD_ACL;
125			TAILQ_INSERT_TAIL(&entrylist, entry, next);
126			break;
127		case 'b':
128			entry = zmalloc(sizeof(struct sf_entry));
129			entry->op = OP_REMOVE_EXT;
130			TAILQ_INSERT_TAIL(&entrylist, entry, next);
131			break;
132		case 'd':
133			acl_type = ACL_TYPE_DEFAULT;
134			break;
135		case 'h':
136			h_flag = 1;
137			break;
138		case 'k':
139			entry = zmalloc(sizeof(struct sf_entry));
140			entry->op = OP_REMOVE_DEF;
141			TAILQ_INSERT_TAIL(&entrylist, entry, next);
142			break;
143		case 'm':
144			entry = zmalloc(sizeof(struct sf_entry));
145			entry->acl = acl_from_text(optarg);
146			if (entry->acl == NULL)
147				err(1, "%s", optarg);
148			entry->op = OP_MERGE_ACL;
149			TAILQ_INSERT_TAIL(&entrylist, entry, next);
150			break;
151		case 'n':
152			n_flag++;
153			break;
154		case 'x':
155			entry = zmalloc(sizeof(struct sf_entry));
156			entry_number = strtol(optarg, &end, 10);
157			if (end - optarg == (int)strlen(optarg)) {
158				if (entry_number < 0)
159					errx(1, "%s: entry number cannot be less than zero", optarg);
160				entry->entry_number = entry_number;
161				entry->op = OP_REMOVE_BY_NUMBER;
162			} else {
163				entry->acl = acl_from_text(optarg);
164				if (entry->acl == NULL)
165					err(1, "%s", optarg);
166				entry->op = OP_REMOVE_ACL;
167			}
168			TAILQ_INSERT_TAIL(&entrylist, entry, next);
169			break;
170		default:
171			usage();
172			break;
173		}
174	argc -= optind;
175	argv += optind;
176
177	if (n_flag == 0 && TAILQ_EMPTY(&entrylist))
178		usage();
179
180	/* take list of files from stdin */
181	if (argc == 0 || strcmp(argv[0], "-") == 0) {
182		if (have_stdin)
183			err(1, "cannot have more than one stdin");
184		have_stdin = 1;
185		bzero(&filename, sizeof(filename));
186		while (fgets(filename, (int)sizeof(filename), stdin)) {
187			/* remove the \n */
188			filename[strlen(filename) - 1] = '\0';
189			fn_dup = strdup(filename);
190			if (fn_dup == NULL)
191				err(1, "strdup() failed");
192			add_filename(fn_dup);
193		}
194	} else
195		for (i = 0; i < argc; i++)
196			add_filename(argv[i]);
197
198	/* cycle through each file */
199	TAILQ_FOREACH(file, &filelist, next) {
200		local_error = 0;
201
202		if (stat(file->filename, &sb) == -1) {
203			warn("%s: stat() failed", file->filename);
204			continue;
205		}
206
207		if (acl_type == ACL_TYPE_DEFAULT && S_ISDIR(sb.st_mode) == 0) {
208			warnx("%s: default ACL may only be set on a directory",
209			    file->filename);
210			continue;
211		}
212
213		if (h_flag)
214			ret = lpathconf(file->filename, _PC_ACL_NFS4);
215		else
216			ret = pathconf(file->filename, _PC_ACL_NFS4);
217		if (ret > 0) {
218			if (acl_type == ACL_TYPE_DEFAULT) {
219				warnx("%s: there are no default entries "
220			           "in NFSv4 ACLs", file->filename);
221				continue;
222			}
223			acl_type = ACL_TYPE_NFS4;
224		} else if (ret == 0) {
225			if (acl_type == ACL_TYPE_NFS4)
226				acl_type = ACL_TYPE_ACCESS;
227		} else if (ret < 0 && errno != EINVAL) {
228			warn("%s: pathconf(..., _PC_ACL_NFS4) failed",
229			    file->filename);
230		}
231
232		if (h_flag)
233			acl = acl_get_link_np(file->filename, acl_type);
234		else
235			acl = acl_get_file(file->filename, acl_type);
236		if (acl == NULL) {
237			if (h_flag)
238				warn("%s: acl_get_link_np() failed",
239				    file->filename);
240			else
241				warn("%s: acl_get_file() failed",
242				    file->filename);
243			continue;
244		}
245
246		/* cycle through each option */
247		TAILQ_FOREACH(entry, &entrylist, next) {
248			if (local_error)
249				continue;
250
251			switch(entry->op) {
252			case OP_ADD_ACL:
253				local_error += add_acl(entry->acl,
254				    entry->entry_number, &acl, file->filename);
255				break;
256			case OP_MERGE_ACL:
257				local_error += merge_acl(entry->acl, &acl,
258				    file->filename);
259				need_mask = 1;
260				break;
261			case OP_REMOVE_EXT:
262				remove_ext(&acl, file->filename);
263				need_mask = 0;
264				break;
265			case OP_REMOVE_DEF:
266				if (acl_type == ACL_TYPE_NFS4) {
267					warnx("%s: there are no default entries in NFSv4 ACLs; "
268					    "cannot remove", file->filename);
269					local_error++;
270					break;
271				}
272				if (acl_delete_def_file(file->filename) == -1) {
273					warn("%s: acl_delete_def_file() failed",
274					    file->filename);
275					local_error++;
276				}
277				if (acl_type == ACL_TYPE_DEFAULT)
278					local_error += remove_default(&acl,
279					    file->filename);
280				need_mask = 0;
281				break;
282			case OP_REMOVE_ACL:
283				local_error += remove_acl(entry->acl, &acl,
284				    file->filename);
285				need_mask = 1;
286				break;
287			case OP_REMOVE_BY_NUMBER:
288				local_error += remove_by_number(entry->entry_number,
289				    &acl, file->filename);
290				need_mask = 1;
291				break;
292			}
293		}
294
295		/* don't bother setting the ACL if something is broken */
296		if (local_error) {
297			carried_error++;
298			continue;
299		}
300
301		if (acl_type != ACL_TYPE_NFS4 && need_mask &&
302		    set_acl_mask(&acl, file->filename) == -1) {
303			warnx("%s: failed to set ACL mask", file->filename);
304			carried_error++;
305		} else if (h_flag) {
306			if (acl_set_link_np(file->filename, acl_type,
307			    acl) == -1) {
308				carried_error++;
309				warn("%s: acl_set_link_np() failed",
310				    file->filename);
311			}
312		} else {
313			if (acl_set_file(file->filename, acl_type,
314			    acl) == -1) {
315				carried_error++;
316				warn("%s: acl_set_file() failed",
317				    file->filename);
318			}
319		}
320
321		acl_free(acl);
322	}
323
324	return (carried_error);
325}
326