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 * This code is derived from software contributed to Berkeley
8 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
9 * Support code is derived from software contributed to Berkeley
10 * by Atsushi Murai (amurai@spec.co.jp).
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)mount_cd9660.c 8.7 (Berkeley) 5/1/95
37 */
38
39 #ifndef lint
40 static const char copyright[] =
41 "@(#) Copyright (c) 1992, 1993, 1994\n\
42 The Regents of the University of California. All rights reserved.\n";
43 #endif /* not lint */
44
45 #ifndef lint
46 /*
47 static char sccsid[] = "@(#)mount_cd9660.c 8.7 (Berkeley) 5/1/95";
48 */
49 #endif /* not lint */
50
51 #include <sys/cdio.h>
52 #include <sys/file.h>
53 #include <sys/param.h>
54 #include <sys/mount.h>
55 #include <sys/module.h>
56 #include <sys/iconv.h>
57 #include <sys/linker.h>
58
59 #include <arpa/inet.h>
60
61 #include <ctype.h>
62 #include <err.h>
63 #include <errno.h>
64 #include <grp.h>
65 #include <pwd.h>
66 #include <stdlib.h>
67 #include <stdio.h>
68 #include <string.h>
69 #include <sysexits.h>
70 #include <unistd.h>
71
72 #include "mntopts.h"
73
74 static struct mntopt mopts[] = {
75 MOPT_STDOPTS,
76 MOPT_UPDATE,
77 MOPT_END
78 };
79
80 static gid_t a_gid(const char *);
81 static uid_t a_uid(const char *);
82 static mode_t a_mask(const char *);
83 static int get_ssector(const char *dev);
84 static int set_charset(struct iovec **, int *iovlen, const char *);
85 void usage(void);
86
87 int
main(int argc,char ** argv)88 main(int argc, char **argv)
89 {
90 struct iovec *iov;
91 int iovlen;
92 int ch, mntflags;
93 char *dev, *dir, *p, *val, mntpath[MAXPATHLEN];
94 int verbose;
95 int ssector; /* starting sector, 0 for 1st session */
96 char fstype[] = "cd9660";
97
98 iov = NULL;
99 iovlen = 0;
100 mntflags = verbose = 0;
101 ssector = -1;
102
103 while ((ch = getopt(argc, argv, "begG:jm:M:o:rs:U:vC:")) != -1)
104 switch (ch) {
105 case 'b':
106 build_iovec(&iov, &iovlen, "brokenjoliet", NULL, (size_t)-1);
107 break;
108 case 'e':
109 build_iovec(&iov, &iovlen, "extatt", NULL, (size_t)-1);
110 break;
111 case 'g':
112 build_iovec(&iov, &iovlen, "gens", NULL, (size_t)-1);
113 break;
114 case 'G':
115 build_iovec_argf(&iov, &iovlen, "gid", "%d", a_gid(optarg));
116 break;
117 case 'm':
118 build_iovec_argf(&iov, &iovlen, "mask", "%u", a_mask(optarg));
119 break;
120 case 'M':
121 build_iovec_argf(&iov, &iovlen, "dirmask", "%u", a_mask(optarg));
122 break;
123 case 'j':
124 build_iovec(&iov, &iovlen, "nojoliet", NULL, (size_t)-1);
125 break;
126 case 'o':
127 getmntopts(optarg, mopts, &mntflags, NULL);
128 p = strchr(optarg, '=');
129 val = NULL;
130 if (p != NULL) {
131 *p = '\0';
132 val = p + 1;
133 }
134 build_iovec(&iov, &iovlen, optarg, val, (size_t)-1);
135 break;
136 case 'r':
137 build_iovec(&iov, &iovlen, "norrip", NULL, (size_t)-1);
138 break;
139 case 's':
140 ssector = atoi(optarg);
141 break;
142 case 'U':
143 build_iovec_argf(&iov, &iovlen, "uid", "%d", a_uid(optarg));
144 break;
145 case 'v':
146 verbose++;
147 break;
148 case 'C':
149 if (set_charset(&iov, &iovlen, optarg) == -1)
150 err(EX_OSERR, "cd9660_iconv");
151 build_iovec(&iov, &iovlen, "kiconv", NULL, (size_t)-1);
152 break;
153 case '?':
154 default:
155 usage();
156 }
157 argc -= optind;
158 argv += optind;
159
160 if (argc != 2)
161 usage();
162
163 dev = argv[0];
164 dir = argv[1];
165
166 /*
167 * Resolve the mountpoint with realpath(3) and remove unnecessary
168 * slashes from the devicename if there are any.
169 */
170 if (checkpath(dir, mntpath) != 0)
171 err(1, "%s", mntpath);
172 (void)rmslashes(dev, dev);
173
174 if (ssector == -1) {
175 /*
176 * The start of the session has not been specified on
177 * the command line. If we can successfully read the
178 * TOC of a CD-ROM, use the last data track we find.
179 * Otherwise, just use 0, in order to mount the very
180 * first session. This is compatible with the
181 * historic behaviour of mount_cd9660(8). If the user
182 * has specified -s <ssector> above, we don't get here
183 * and leave the user's will.
184 */
185 if ((ssector = get_ssector(dev)) == -1) {
186 if (verbose)
187 printf("could not determine starting sector, "
188 "using very first session\n");
189 ssector = 0;
190 } else if (verbose)
191 printf("using starting sector %d\n", ssector);
192 }
193 mntflags |= MNT_RDONLY;
194 build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1);
195 build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
196 build_iovec(&iov, &iovlen, "from", dev, (size_t)-1);
197 build_iovec_argf(&iov, &iovlen, "ssector", "%d", ssector);
198
199 if (nmount(iov, iovlen, mntflags) < 0)
200 err(1, "%s", dev);
201 exit(0);
202 }
203
204 void
usage(void)205 usage(void)
206 {
207 (void)fprintf(stderr,
208 "usage: mount_cd9660 [-begjrv] [-C charset] [-G gid] [-m mask] [-M mask]\n"
209 " [-o options] [-U uid] [-s startsector] special node\n");
210 exit(EX_USAGE);
211 }
212
213 static int
get_ssector(const char * dev)214 get_ssector(const char *dev)
215 {
216 struct ioc_toc_header h;
217 struct ioc_read_toc_entry t;
218 struct cd_toc_entry toc_buffer[100];
219 int fd, ntocentries, i;
220
221 if ((fd = open(dev, O_RDONLY)) == -1)
222 return -1;
223 if (ioctl(fd, CDIOREADTOCHEADER, &h) == -1) {
224 close(fd);
225 return -1;
226 }
227
228 ntocentries = h.ending_track - h.starting_track + 1;
229 if (ntocentries > 100) {
230 /* unreasonable, only 100 allowed */
231 close(fd);
232 return -1;
233 }
234 t.address_format = CD_LBA_FORMAT;
235 t.starting_track = 0;
236 t.data_len = ntocentries * sizeof(struct cd_toc_entry);
237 t.data = toc_buffer;
238
239 if (ioctl(fd, CDIOREADTOCENTRYS, (char *) &t) == -1) {
240 close(fd);
241 return -1;
242 }
243 close(fd);
244
245 for (i = ntocentries - 1; i >= 0; i--)
246 if ((toc_buffer[i].control & 4) != 0)
247 /* found a data track */
248 break;
249 if (i < 0)
250 return -1;
251
252 return ntohl(toc_buffer[i].addr.lba);
253 }
254
255 static int
set_charset(struct iovec ** iov,int * iovlen,const char * localcs)256 set_charset(struct iovec **iov, int *iovlen, const char *localcs)
257 {
258 int error;
259 char *cs_disk; /* disk charset for Joliet cs conversion */
260 char *cs_local; /* local charset for Joliet cs conversion */
261
262 cs_disk = NULL;
263 cs_local = NULL;
264
265 if (modfind("cd9660_iconv") < 0)
266 if (kldload("cd9660_iconv") < 0 || modfind("cd9660_iconv") < 0) {
267 warnx( "cannot find or load \"cd9660_iconv\" kernel module");
268 return (-1);
269 }
270
271 if ((cs_disk = malloc(ICONV_CSNMAXLEN)) == NULL)
272 return (-1);
273 if ((cs_local = malloc(ICONV_CSNMAXLEN)) == NULL) {
274 free(cs_disk);
275 return (-1);
276 }
277 strncpy(cs_disk, ENCODING_UNICODE, ICONV_CSNMAXLEN);
278 strncpy(cs_local, kiconv_quirkcs(localcs, KICONV_VENDOR_MICSFT),
279 ICONV_CSNMAXLEN);
280 error = kiconv_add_xlat16_cspairs(cs_disk, cs_local);
281 if (error)
282 return (-1);
283
284 build_iovec(iov, iovlen, "cs_disk", cs_disk, (size_t)-1);
285 build_iovec(iov, iovlen, "cs_local", cs_local, (size_t)-1);
286
287 return (0);
288 }
289
290 static gid_t
a_gid(const char * s)291 a_gid(const char *s)
292 {
293 struct group *gr;
294 const char *gname;
295 gid_t gid;
296
297 if ((gr = getgrnam(s)) != NULL)
298 gid = gr->gr_gid;
299 else {
300 for (gname = s; *s && isdigit(*s); ++s);
301 if (!*s)
302 gid = atoi(gname);
303 else
304 errx(EX_NOUSER, "unknown group id: %s", gname);
305 }
306 return (gid);
307 }
308
309 static uid_t
a_uid(const char * s)310 a_uid(const char *s)
311 {
312 struct passwd *pw;
313 const char *uname;
314 uid_t uid;
315
316 if ((pw = getpwnam(s)) != NULL)
317 uid = pw->pw_uid;
318 else {
319 for (uname = s; *s && isdigit(*s); ++s);
320 if (!*s)
321 uid = atoi(uname);
322 else
323 errx(EX_NOUSER, "unknown user id: %s", uname);
324 }
325 return (uid);
326 }
327
328 static mode_t
a_mask(const char * s)329 a_mask(const char *s)
330 {
331 int done, rv;
332 char *ep;
333
334 done = 0;
335 rv = -1;
336 if (*s >= '0' && *s <= '7') {
337 done = 1;
338 rv = strtol(optarg, &ep, 8);
339 }
340 if (!done || rv < 0 || *ep)
341 errx(EX_USAGE, "invalid file mode: %s", s);
342 return (rv);
343 }
344