1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 1999-2002 Robert N. M. Watson
5 * All rights reserved.
6 *
7 * This software was developed by Robert Watson for the TrustedBSD Project.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30 /*
31 * Developed by the TrustedBSD Project.
32 * Support for file system extended attribute.
33 */
34
35 #include <sys/types.h>
36 #include <sys/uio.h>
37 #include <sys/extattr.h>
38 #include <sys/param.h>
39 #include <sys/mount.h>
40
41 #include <ufs/ufs/extattr.h>
42
43 #include <errno.h>
44 #include <fcntl.h>
45 #include <libutil.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <unistd.h>
50
51 int initattr(int argc, char *argv[]);
52 int showattr(int argc, char *argv[]);
53 long num_inodes_by_path(char *path);
54 void usage(void);
55
56 void
usage(void)57 usage(void)
58 {
59
60 fprintf(stderr,
61 "usage:\n"
62 " extattrctl start path\n"
63 " extattrctl stop path\n"
64 " extattrctl initattr [-f] [-p path] attrsize attrfile\n"
65 " extattrctl showattr attrfile\n"
66 " extattrctl enable path attrnamespace attrname attrfile\n"
67 " extattrctl disable path attrnamespace attrname\n");
68 exit(-1);
69 }
70
71 long
num_inodes_by_path(char * path)72 num_inodes_by_path(char *path)
73 {
74 struct statfs buf;
75 int error;
76
77 error = statfs(path, &buf);
78 if (error) {
79 perror("statfs");
80 return (-1);
81 }
82
83 return (buf.f_files);
84 }
85
86 static const char zero_buf[8192];
87
88 int
initattr(int argc,char * argv[])89 initattr(int argc, char *argv[])
90 {
91 struct ufs_extattr_fileheader uef;
92 char *fs_path = NULL;
93 int ch, i, error, flags;
94 ssize_t wlen;
95 size_t easize;
96
97 flags = O_CREAT | O_WRONLY | O_TRUNC | O_EXCL;
98 optind = 0;
99 while ((ch = getopt(argc, argv, "fp:r:w:")) != -1)
100 switch (ch) {
101 case 'f':
102 flags &= ~O_EXCL;
103 break;
104 case 'p':
105 fs_path = optarg;
106 break;
107 case '?':
108 default:
109 usage();
110 }
111
112 argc -= optind;
113 argv += optind;
114
115 if (argc != 2)
116 usage();
117
118 error = 0;
119 if ((i = open(argv[1], flags, 0600)) == -1) {
120 /* unable to open file */
121 perror(argv[1]);
122 return (-1);
123 }
124 uef.uef_magic = UFS_EXTATTR_MAGIC;
125 uef.uef_version = UFS_EXTATTR_VERSION;
126 uef.uef_size = atoi(argv[0]);
127 if (write(i, &uef, sizeof(uef)) == -1)
128 error = -1;
129 else if (fs_path != NULL) {
130 easize = (sizeof uef + uef.uef_size) *
131 num_inodes_by_path(fs_path);
132 while (easize > 0) {
133 if (easize > sizeof zero_buf)
134 wlen = write(i, zero_buf, sizeof zero_buf);
135 else
136 wlen = write(i, zero_buf, easize);
137 if (wlen == -1) {
138 error = -1;
139 break;
140 }
141 easize -= wlen;
142 }
143 }
144 if (error == -1) {
145 perror(argv[1]);
146 unlink(argv[1]);
147 close(i);
148 return (-1);
149 }
150
151 close(i);
152 return (0);
153 }
154
155 int
showattr(int argc,char * argv[])156 showattr(int argc, char *argv[])
157 {
158 struct ufs_extattr_fileheader uef;
159 int i, fd;
160
161 if (argc != 1)
162 usage();
163
164 fd = open(argv[0], O_RDONLY);
165 if (fd == -1) {
166 perror(argv[0]);
167 return (-1);
168 }
169
170 i = read(fd, &uef, sizeof(uef));
171 if (i == -1) {
172 perror(argv[0]);
173 close(fd);
174 return (-1);
175 }
176 if (i != sizeof(uef)) {
177 fprintf(stderr, "%s: invalid file header\n", argv[0]);
178 close(fd);
179 return (-1);
180 }
181
182 if (uef.uef_magic != UFS_EXTATTR_MAGIC) {
183 fprintf(stderr, "%s: bad magic\n", argv[0]);
184 close(fd);
185 return (-1);
186 }
187
188 printf("%s: version %d, size %d\n", argv[0], uef.uef_version,
189 uef.uef_size);
190
191 close(fd);
192 return (0);
193 }
194
195 int
main(int argc,char * argv[])196 main(int argc, char *argv[])
197 {
198 int error = 0, attrnamespace;
199
200 if (argc < 2)
201 usage();
202
203 if (!strcmp(argv[1], "start")) {
204 if (argc != 3)
205 usage();
206 error = extattrctl(argv[2], UFS_EXTATTR_CMD_START, NULL, 0,
207 NULL);
208 if (error) {
209 perror("extattrctl start");
210 return (-1);
211 }
212 } else if (!strcmp(argv[1], "stop")) {
213 if (argc != 3)
214 usage();
215 error = extattrctl(argv[2], UFS_EXTATTR_CMD_STOP, NULL, 0,
216 NULL);
217 if (error) {
218 perror("extattrctl stop");
219 return (-1);
220 }
221 } else if (!strcmp(argv[1], "enable")) {
222 if (argc != 6)
223 usage();
224 error = extattr_string_to_namespace(argv[3], &attrnamespace);
225 if (error) {
226 perror("extattrctl enable");
227 return (-1);
228 }
229 error = extattrctl(argv[2], UFS_EXTATTR_CMD_ENABLE, argv[5],
230 attrnamespace, argv[4]);
231 if (error) {
232 perror("extattrctl enable");
233 return (-1);
234 }
235 } else if (!strcmp(argv[1], "disable")) {
236 if (argc != 5)
237 usage();
238 error = extattr_string_to_namespace(argv[3], &attrnamespace);
239 if (error) {
240 perror("extattrctl disable");
241 return (-1);
242 }
243 error = extattrctl(argv[2], UFS_EXTATTR_CMD_DISABLE, NULL,
244 attrnamespace, argv[4]);
245 if (error) {
246 perror("extattrctl disable");
247 return (-1);
248 }
249 } else if (!strcmp(argv[1], "initattr")) {
250 argc -= 2;
251 argv += 2;
252 error = initattr(argc, argv);
253 if (error)
254 return (-1);
255 } else if (!strcmp(argv[1], "showattr")) {
256 argc -= 2;
257 argv += 2;
258 error = showattr(argc, argv);
259 if (error)
260 return (-1);
261 } else
262 usage();
263
264 return (0);
265 }
266