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
37 #include <sys/cdio.h>
38 #include <sys/file.h>
39 #include <sys/param.h>
40 #include <sys/mount.h>
41 #include <sys/module.h>
42 #include <sys/iconv.h>
43 #include <sys/linker.h>
44
45 #include <arpa/inet.h>
46
47 #include <ctype.h>
48 #include <err.h>
49 #include <errno.h>
50 #include <grp.h>
51 #include <pwd.h>
52 #include <stdlib.h>
53 #include <stdio.h>
54 #include <string.h>
55 #include <sysexits.h>
56 #include <unistd.h>
57
58 #include "mntopts.h"
59
60 static struct mntopt mopts[] = {
61 MOPT_STDOPTS,
62 MOPT_UPDATE,
63 MOPT_END
64 };
65
66 static gid_t a_gid(const char *);
67 static uid_t a_uid(const char *);
68 static mode_t a_mask(const char *);
69 static int get_ssector(const char *dev);
70 static int set_charset(struct iovec **, int *iovlen, const char *);
71 void usage(void);
72
73 int
main(int argc,char ** argv)74 main(int argc, char **argv)
75 {
76 struct iovec *iov;
77 int iovlen;
78 int ch, mntflags;
79 char *dev, *dir, *p, *val, mntpath[MAXPATHLEN];
80 int verbose;
81 int ssector; /* starting sector, 0 for 1st session */
82 char fstype[] = "cd9660";
83
84 iov = NULL;
85 iovlen = 0;
86 mntflags = verbose = 0;
87 ssector = -1;
88
89 while ((ch = getopt(argc, argv, "begG:jm:M:o:rs:U:vC:")) != -1)
90 switch (ch) {
91 case 'b':
92 build_iovec(&iov, &iovlen, "brokenjoliet", NULL, (size_t)-1);
93 break;
94 case 'e':
95 build_iovec(&iov, &iovlen, "extatt", NULL, (size_t)-1);
96 break;
97 case 'g':
98 build_iovec(&iov, &iovlen, "gens", NULL, (size_t)-1);
99 break;
100 case 'G':
101 build_iovec_argf(&iov, &iovlen, "gid", "%d", a_gid(optarg));
102 break;
103 case 'm':
104 build_iovec_argf(&iov, &iovlen, "mask", "%u", a_mask(optarg));
105 break;
106 case 'M':
107 build_iovec_argf(&iov, &iovlen, "dirmask", "%u", a_mask(optarg));
108 break;
109 case 'j':
110 build_iovec(&iov, &iovlen, "nojoliet", NULL, (size_t)-1);
111 break;
112 case 'o':
113 getmntopts(optarg, mopts, &mntflags, NULL);
114 p = strchr(optarg, '=');
115 val = NULL;
116 if (p != NULL) {
117 *p = '\0';
118 val = p + 1;
119 }
120 build_iovec(&iov, &iovlen, optarg, val, (size_t)-1);
121 break;
122 case 'r':
123 build_iovec(&iov, &iovlen, "norrip", NULL, (size_t)-1);
124 break;
125 case 's':
126 ssector = atoi(optarg);
127 break;
128 case 'U':
129 build_iovec_argf(&iov, &iovlen, "uid", "%d", a_uid(optarg));
130 break;
131 case 'v':
132 verbose++;
133 break;
134 case 'C':
135 if (set_charset(&iov, &iovlen, optarg) == -1)
136 err(EX_OSERR, "cd9660_iconv");
137 build_iovec(&iov, &iovlen, "kiconv", NULL, (size_t)-1);
138 break;
139 case '?':
140 default:
141 usage();
142 }
143 argc -= optind;
144 argv += optind;
145
146 if (argc != 2)
147 usage();
148
149 dev = argv[0];
150 dir = argv[1];
151
152 /*
153 * Resolve the mountpoint with realpath(3) and remove unnecessary
154 * slashes from the devicename if there are any.
155 */
156 if (checkpath(dir, mntpath) != 0)
157 err(1, "%s", mntpath);
158 (void)rmslashes(dev, dev);
159
160 if (ssector == -1) {
161 /*
162 * The start of the session has not been specified on
163 * the command line. If we can successfully read the
164 * TOC of a CD-ROM, use the last data track we find.
165 * Otherwise, just use 0, in order to mount the very
166 * first session. This is compatible with the
167 * historic behaviour of mount_cd9660(8). If the user
168 * has specified -s <ssector> above, we don't get here
169 * and leave the user's will.
170 */
171 if ((ssector = get_ssector(dev)) == -1) {
172 if (verbose)
173 printf("could not determine starting sector, "
174 "using very first session\n");
175 ssector = 0;
176 } else if (verbose)
177 printf("using starting sector %d\n", ssector);
178 }
179 mntflags |= MNT_RDONLY;
180 build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1);
181 build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
182 build_iovec(&iov, &iovlen, "from", dev, (size_t)-1);
183 build_iovec_argf(&iov, &iovlen, "ssector", "%d", ssector);
184
185 if (nmount(iov, iovlen, mntflags) < 0)
186 err(1, "%s", dev);
187 exit(0);
188 }
189
190 void
usage(void)191 usage(void)
192 {
193 (void)fprintf(stderr,
194 "usage: mount_cd9660 [-begjrv] [-C charset] [-G gid] [-m mask] [-M mask]\n"
195 " [-o options] [-U uid] [-s startsector] special node\n");
196 exit(EX_USAGE);
197 }
198
199 static int
get_ssector(const char * dev)200 get_ssector(const char *dev)
201 {
202 struct ioc_toc_header h;
203 struct ioc_read_toc_entry t;
204 struct cd_toc_entry toc_buffer[100];
205 int fd, ntocentries, i;
206
207 if ((fd = open(dev, O_RDONLY)) == -1)
208 return -1;
209 if (ioctl(fd, CDIOREADTOCHEADER, &h) == -1) {
210 close(fd);
211 return -1;
212 }
213
214 ntocentries = h.ending_track - h.starting_track + 1;
215 if (ntocentries > 100) {
216 /* unreasonable, only 100 allowed */
217 close(fd);
218 return -1;
219 }
220 t.address_format = CD_LBA_FORMAT;
221 t.starting_track = 0;
222 t.data_len = ntocentries * sizeof(struct cd_toc_entry);
223 t.data = toc_buffer;
224
225 if (ioctl(fd, CDIOREADTOCENTRYS, (char *) &t) == -1) {
226 close(fd);
227 return -1;
228 }
229 close(fd);
230
231 for (i = ntocentries - 1; i >= 0; i--)
232 if ((toc_buffer[i].control & 4) != 0)
233 /* found a data track */
234 break;
235 if (i < 0)
236 return -1;
237
238 return ntohl(toc_buffer[i].addr.lba);
239 }
240
241 static int
set_charset(struct iovec ** iov,int * iovlen,const char * localcs)242 set_charset(struct iovec **iov, int *iovlen, const char *localcs)
243 {
244 int error;
245 char *cs_disk; /* disk charset for Joliet cs conversion */
246 char *cs_local; /* local charset for Joliet cs conversion */
247
248 cs_disk = NULL;
249 cs_local = NULL;
250
251 if (modfind("cd9660_iconv") < 0)
252 if (kldload("cd9660_iconv") < 0 || modfind("cd9660_iconv") < 0) {
253 warnx( "cannot find or load \"cd9660_iconv\" kernel module");
254 return (-1);
255 }
256
257 if ((cs_disk = malloc(ICONV_CSNMAXLEN)) == NULL)
258 return (-1);
259 if ((cs_local = malloc(ICONV_CSNMAXLEN)) == NULL) {
260 free(cs_disk);
261 return (-1);
262 }
263 strncpy(cs_disk, ENCODING_UNICODE, ICONV_CSNMAXLEN);
264 strncpy(cs_local, kiconv_quirkcs(localcs, KICONV_VENDOR_MICSFT),
265 ICONV_CSNMAXLEN);
266 error = kiconv_add_xlat16_cspairs(cs_disk, cs_local);
267 if (error)
268 return (-1);
269
270 build_iovec(iov, iovlen, "cs_disk", cs_disk, (size_t)-1);
271 build_iovec(iov, iovlen, "cs_local", cs_local, (size_t)-1);
272
273 return (0);
274 }
275
276 static gid_t
a_gid(const char * s)277 a_gid(const char *s)
278 {
279 struct group *gr;
280 const char *gname;
281 gid_t gid;
282
283 if ((gr = getgrnam(s)) != NULL)
284 gid = gr->gr_gid;
285 else {
286 for (gname = s; *s && isdigit(*s); ++s);
287 if (!*s)
288 gid = atoi(gname);
289 else
290 errx(EX_NOUSER, "unknown group id: %s", gname);
291 }
292 return (gid);
293 }
294
295 static uid_t
a_uid(const char * s)296 a_uid(const char *s)
297 {
298 struct passwd *pw;
299 const char *uname;
300 uid_t uid;
301
302 if ((pw = getpwnam(s)) != NULL)
303 uid = pw->pw_uid;
304 else {
305 for (uname = s; *s && isdigit(*s); ++s);
306 if (!*s)
307 uid = atoi(uname);
308 else
309 errx(EX_NOUSER, "unknown user id: %s", uname);
310 }
311 return (uid);
312 }
313
314 static mode_t
a_mask(const char * s)315 a_mask(const char *s)
316 {
317 int done, rv;
318 char *ep;
319
320 done = 0;
321 rv = -1;
322 if (*s >= '0' && *s <= '7') {
323 done = 1;
324 rv = strtol(optarg, &ep, 8);
325 }
326 if (!done || rv < 0 || *ep)
327 errx(EX_USAGE, "invalid file mode: %s", s);
328 return (rv);
329 }
330