1 /*
2 * Copyright (c) 1992, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley
6 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
7 * Support code is derived from software contributed to Berkeley
8 * by Atsushi Murai (amurai@spec.co.jp).
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)mount_cd9660.c 8.7 (Berkeley) 5/1/95
35 */
36
37 #ifndef lint
38 static const char copyright[] =
39 "@(#) Copyright (c) 1992, 1993, 1994\n\
40 The Regents of the University of California. All rights reserved.\n";
41 #endif /* not lint */
42
43 #ifndef lint
44 /*
45 static char sccsid[] = "@(#)mount_cd9660.c 8.7 (Berkeley) 5/1/95";
46 */
47 static const char rcsid[] =
48 "$FreeBSD: stable/9/sbin/mount_cd9660/mount_cd9660.c 199584 2009-11-20 15:28:38Z netchild $";
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 <err.h>
62 #include <errno.h>
63 #include <stdlib.h>
64 #include <stdio.h>
65 #include <string.h>
66 #include <sysexits.h>
67 #include <unistd.h>
68
69 #include "mntopts.h"
70
71 struct mntopt mopts[] = {
72 MOPT_STDOPTS,
73 MOPT_UPDATE,
74 MOPT_END
75 };
76
77 static int get_ssector(const char *dev);
78 static int set_charset(struct iovec **, int *iovlen, const char *);
79 void usage(void);
80
81 int
main(int argc,char ** argv)82 main(int argc, char **argv)
83 {
84 struct iovec *iov;
85 int iovlen;
86 int ch, mntflags, opts;
87 char *dev, *dir, *p, *val, mntpath[MAXPATHLEN];
88 int verbose;
89 int ssector; /* starting sector, 0 for 1st session */
90 char fstype[] = "cd9660";
91
92 iov = NULL;
93 iovlen = 0;
94 mntflags = opts = verbose = 0;
95 ssector = -1;
96
97 while ((ch = getopt(argc, argv, "begjo:rs:vC:")) != -1)
98 switch (ch) {
99 case 'b':
100 build_iovec(&iov, &iovlen, "brokenjoliet", NULL, (size_t)-1);
101 break;
102 case 'e':
103 build_iovec(&iov, &iovlen, "extatt", NULL, (size_t)-1);
104 break;
105 case 'g':
106 build_iovec(&iov, &iovlen, "gens", NULL, (size_t)-1);
107 break;
108 case 'j':
109 build_iovec(&iov, &iovlen, "nojoliet", NULL, (size_t)-1);
110 break;
111 case 'o':
112 getmntopts(optarg, mopts, &mntflags, &opts);
113 p = strchr(optarg, '=');
114 val = NULL;
115 if (p != NULL) {
116 *p = '\0';
117 val = p + 1;
118 }
119 build_iovec(&iov, &iovlen, optarg, val, (size_t)-1);
120 break;
121 case 'r':
122 build_iovec(&iov, &iovlen, "norrip", NULL, (size_t)-1);
123 break;
124 case 's':
125 ssector = atoi(optarg);
126 break;
127 case 'v':
128 verbose++;
129 break;
130 case 'C':
131 if (set_charset(&iov, &iovlen, optarg) == -1)
132 err(EX_OSERR, "cd9660_iconv");
133 build_iovec(&iov, &iovlen, "kiconv", NULL, (size_t)-1);
134 break;
135 case '?':
136 default:
137 usage();
138 }
139 argc -= optind;
140 argv += optind;
141
142 if (argc != 2)
143 usage();
144
145 dev = argv[0];
146 dir = argv[1];
147
148 /*
149 * Resolve the mountpoint with realpath(3) and remove unnecessary
150 * slashes from the devicename if there are any.
151 */
152 (void)checkpath(dir, mntpath);
153 (void)rmslashes(dev, dev);
154
155 if (ssector == -1) {
156 /*
157 * The start of the session has not been specified on
158 * the command line. If we can successfully read the
159 * TOC of a CD-ROM, use the last data track we find.
160 * Otherwise, just use 0, in order to mount the very
161 * first session. This is compatible with the
162 * historic behaviour of mount_cd9660(8). If the user
163 * has specified -s <ssector> above, we don't get here
164 * and leave the user's will.
165 */
166 if ((ssector = get_ssector(dev)) == -1) {
167 if (verbose)
168 printf("could not determine starting sector, "
169 "using very first session\n");
170 ssector = 0;
171 } else if (verbose)
172 printf("using starting sector %d\n", ssector);
173 }
174 mntflags |= MNT_RDONLY;
175 build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1);
176 build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1);
177 build_iovec(&iov, &iovlen, "from", dev, (size_t)-1);
178 build_iovec_argf(&iov, &iovlen, "ssector", "%d", ssector);
179
180 if (nmount(iov, iovlen, mntflags) < 0)
181 err(1, "%s", dev);
182 exit(0);
183 }
184
185 void
usage(void)186 usage(void)
187 {
188 (void)fprintf(stderr,
189 "usage: mount_cd9660 [-begjrv] [-C charset] [-o options] [-s startsector]\n"
190 " special node\n");
191 exit(EX_USAGE);
192 }
193
194 static int
get_ssector(const char * dev)195 get_ssector(const char *dev)
196 {
197 struct ioc_toc_header h;
198 struct ioc_read_toc_entry t;
199 struct cd_toc_entry toc_buffer[100];
200 int fd, ntocentries, i;
201
202 if ((fd = open(dev, O_RDONLY)) == -1)
203 return -1;
204 if (ioctl(fd, CDIOREADTOCHEADER, &h) == -1) {
205 close(fd);
206 return -1;
207 }
208
209 ntocentries = h.ending_track - h.starting_track + 1;
210 if (ntocentries > 100) {
211 /* unreasonable, only 100 allowed */
212 close(fd);
213 return -1;
214 }
215 t.address_format = CD_LBA_FORMAT;
216 t.starting_track = 0;
217 t.data_len = ntocentries * sizeof(struct cd_toc_entry);
218 t.data = toc_buffer;
219
220 if (ioctl(fd, CDIOREADTOCENTRYS, (char *) &t) == -1) {
221 close(fd);
222 return -1;
223 }
224 close(fd);
225
226 for (i = ntocentries - 1; i >= 0; i--)
227 if ((toc_buffer[i].control & 4) != 0)
228 /* found a data track */
229 break;
230 if (i < 0)
231 return -1;
232
233 return ntohl(toc_buffer[i].addr.lba);
234 }
235
236 static int
set_charset(struct iovec ** iov,int * iovlen,const char * localcs)237 set_charset(struct iovec **iov, int *iovlen, const char *localcs)
238 {
239 int error;
240 char *cs_disk; /* disk charset for Joliet cs conversion */
241 char *cs_local; /* local charset for Joliet cs conversion */
242
243 cs_disk = NULL;
244 cs_local = NULL;
245
246 if (modfind("cd9660_iconv") < 0)
247 if (kldload("cd9660_iconv") < 0 || modfind("cd9660_iconv") < 0) {
248 warnx( "cannot find or load \"cd9660_iconv\" kernel module");
249 return (-1);
250 }
251
252 if ((cs_disk = malloc(ICONV_CSNMAXLEN)) == NULL)
253 return (-1);
254 if ((cs_local = malloc(ICONV_CSNMAXLEN)) == NULL) {
255 free(cs_disk);
256 return (-1);
257 }
258 strncpy(cs_disk, ENCODING_UNICODE, ICONV_CSNMAXLEN);
259 strncpy(cs_local, kiconv_quirkcs(localcs, KICONV_VENDOR_MICSFT),
260 ICONV_CSNMAXLEN);
261 error = kiconv_add_xlat16_cspairs(cs_disk, cs_local);
262 if (error)
263 return (-1);
264
265 build_iovec(iov, iovlen, "cs_disk", cs_disk, (size_t)-1);
266 build_iovec(iov, iovlen, "cs_local", cs_local, (size_t)-1);
267
268 return (0);
269 }
270