GC !__DragonFly__ section.
[dragonfly.git] / sbin / mount_cd9660 / mount_cd9660.c
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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 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)mount_cd9660.c 8.7 (Berkeley) 5/1/95
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39 *
40 * @(#) Copyright (c) 1992, 1993, 1994 The Regents of the University of California. All rights reserved.
41 * @(#)mount_cd9660.c 8.7 (Berkeley) 5/1/95
42 * $FreeBSD: src/sbin/mount_cd9660/mount_cd9660.c,v 1.15.2.3 2001/03/14 12:05:01 bp Exp $
7cee7052 43 * $DragonFly: src/sbin/mount_cd9660/mount_cd9660.c,v 1.4 2004/12/18 21:43:39 swildner Exp $
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44 */
45
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46#include <sys/cdio.h>
47#include <sys/file.h>
48#include <sys/param.h>
49#include <sys/mount.h>
38a690d7 50#include <sys/../vfs/isofs/cd9660/cd9660_mount.h>
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51
52#include <err.h>
53#include <errno.h>
54#include <stdlib.h>
55#include <stdio.h>
56#include <string.h>
57#include <sysexits.h>
58#include <unistd.h>
59
60#include "mntopts.h"
61
62struct mntopt mopts[] = {
63 MOPT_STDOPTS,
64 MOPT_UPDATE,
65 { "extatt", 0, ISOFSMNT_EXTATT, 1 },
66 { "gens", 0, ISOFSMNT_GENS, 1 },
67 { "rrip", 1, ISOFSMNT_NORRIP, 1 },
68 { "joliet", 1, ISOFSMNT_NOJOLIET, 1 },
69 { "strictjoliet", 1, ISOFSMNT_BROKENJOLIET, 1 },
70 { NULL }
71};
72
73int get_ssector(const char *dev);
74void usage(void);
75
76int
77main(int argc, char **argv)
78{
79 struct iso_args args;
80 int ch, mntflags, opts;
81 char *dev, *dir, mntpath[MAXPATHLEN];
82 struct vfsconf vfc;
83 int error, verbose;
84
85 mntflags = opts = verbose = 0;
86 memset(&args, 0, sizeof args);
87 args.ssector = -1;
88 while ((ch = getopt(argc, argv, "begjo:rs:v")) != -1)
89 switch (ch) {
90 case 'b':
91 opts |= ISOFSMNT_BROKENJOLIET;
92 break;
93 case 'e':
94 opts |= ISOFSMNT_EXTATT;
95 break;
96 case 'g':
97 opts |= ISOFSMNT_GENS;
98 break;
99 case 'j':
100 opts |= ISOFSMNT_NOJOLIET;
101 break;
102 case 'o':
103 getmntopts(optarg, mopts, &mntflags, &opts);
104 break;
105 case 'r':
106 opts |= ISOFSMNT_NORRIP;
107 break;
108 case 's':
109 args.ssector = atoi(optarg);
110 break;
111 case 'v':
112 verbose++;
113 break;
114 case '?':
115 default:
116 usage();
117 }
118 argc -= optind;
119 argv += optind;
120
121 if (argc != 2)
122 usage();
123
124 dev = argv[0];
125 dir = argv[1];
126
127 /*
128 * Resolve the mountpoint with realpath(3) and remove unnecessary
129 * slashes from the devicename if there are any.
130 */
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131 checkpath(dir, mntpath);
132 rmslashes(dev, dev);
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133
134#define DEFAULT_ROOTUID -2
135 /*
136 * ISO 9660 filesystems are not writeable.
137 */
138 mntflags |= MNT_RDONLY;
139 args.export.ex_flags = MNT_EXRDONLY;
140 args.fspec = dev;
141 args.export.ex_root = DEFAULT_ROOTUID;
142 args.flags = opts;
143
144 if (args.ssector == -1) {
145 /*
146 * The start of the session has not been specified on
147 * the command line. If we can successfully read the
148 * TOC of a CD-ROM, use the last data track we find.
149 * Otherwise, just use 0, in order to mount the very
150 * first session. This is compatible with the
151 * historic behaviour of mount_cd9660(8). If the user
152 * has specified -s <ssector> above, we don't get here
153 * and leave the user's will.
154 */
155 if ((args.ssector = get_ssector(dev)) == -1) {
156 if (verbose)
157 printf("could not determine starting sector, "
158 "using very first session\n");
159 args.ssector = 0;
160 } else if (verbose)
161 printf("using starting sector %d\n", args.ssector);
162 }
163
164 error = getvfsbyname("cd9660", &vfc);
165 if (error && vfsisloadable("cd9660")) {
166 if (vfsload("cd9660"))
167 err(EX_OSERR, "vfsload(cd9660)");
168 endvfsent(); /* flush cache */
169 error = getvfsbyname("cd9660", &vfc);
170 }
171 if (error)
172 errx(1, "cd9660 filesystem is not available");
173
174 if (mount(vfc.vfc_name, mntpath, mntflags, &args) < 0)
175 err(1, "%s", args.fspec);
176 exit(0);
177}
178
179void
180usage(void)
181{
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182 fprintf(stderr,
183 "usage: mount_cd9660 [-egrv] [-o options] [-s startsector] special node\n");
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184 exit(EX_USAGE);
185}
186
187int
188get_ssector(const char *dev)
189{
190 struct ioc_toc_header h;
191 struct ioc_read_toc_entry t;
192 struct cd_toc_entry toc_buffer[100];
193 int fd, ntocentries, i;
194
195 if ((fd = open(dev, O_RDONLY)) == -1)
196 return -1;
197 if (ioctl(fd, CDIOREADTOCHEADER, &h) == -1) {
198 close(fd);
199 return -1;
200 }
201
202 ntocentries = h.ending_track - h.starting_track + 1;
203 if (ntocentries > 100) {
204 /* unreasonable, only 100 allowed */
205 close(fd);
206 return -1;
207 }
208 t.address_format = CD_LBA_FORMAT;
209 t.starting_track = 0;
210 t.data_len = ntocentries * sizeof(struct cd_toc_entry);
211 t.data = toc_buffer;
212
213 if (ioctl(fd, CDIOREADTOCENTRYS, (char *) &t) == -1) {
214 close(fd);
215 return -1;
216 }
217 close(fd);
218
219 for (i = ntocentries - 1; i >= 0; i--)
220 if ((toc_buffer[i].control & 4) != 0)
221 /* found a data track */
222 break;
223 if (i < 0)
224 return -1;
225
226 return ntohl(toc_buffer[i].addr.lba);
227}