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 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 $ 43 * $DragonFly: src/sbin/mount_cd9660/mount_cd9660.c,v 1.5 2005/04/02 21:43:15 dillon Exp $ 44 */ 45 46 #include <sys/cdio.h> 47 #include <sys/file.h> 48 #include <sys/param.h> 49 #include <sys/mount.h> 50 #include <sys/../vfs/isofs/cd9660/cd9660_mount.h> 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 62 struct 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 MOPT_NULL 71 }; 72 73 static int get_ssector(const char *dev); 74 static void usage(void); 75 76 int 77 main(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 */ 131 checkpath(dir, mntpath); 132 rmslashes(dev, dev); 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 } 178 179 static void 180 usage(void) 181 { 182 fprintf(stderr, 183 "usage: mount_cd9660 [-egrv] [-o options] [-s startsector] special node\n"); 184 exit(EX_USAGE); 185 } 186 187 static int 188 get_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 } 228