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 41 #ifndef lint 42 static char copyright[] = 43 "@(#) Copyright (c) 1992, 1993, 1994\n\ 44 The Regents of the University of California. All rights reserved.\n"; 45 #endif /* not lint */ 46 47 #ifndef lint 48 /* 49 static char sccsid[] = "@(#)mount_cd9660.c 8.7 (Berkeley) 5/1/95"; 50 */ 51 static const char rcsid[] = 52 "$FreeBSD$"; 53 #endif /* not lint */ 54 55 #include <sys/cdio.h> 56 #include <sys/file.h> 57 #include <sys/param.h> 58 #include <sys/mount.h> 59 #include <sys/../isofs/cd9660/cd9660_mount.h> 60 61 #include <err.h> 62 #include <stdlib.h> 63 #include <stdio.h> 64 #include <string.h> 65 #include <sysexits.h> 66 #include <unistd.h> 67 68 #include "mntopts.h" 69 70 struct mntopt mopts[] = { 71 MOPT_STDOPTS, 72 MOPT_UPDATE, 73 { "extatt", 0, ISOFSMNT_EXTATT, 1 }, 74 { "gens", 0, ISOFSMNT_GENS, 1 }, 75 { "rrip", 1, ISOFSMNT_NORRIP, 1 }, 76 { "joliet", 1, ISOFSMNT_NOJOLIET, 1 }, 77 { NULL } 78 }; 79 80 int get_ssector(const char *dev); 81 void usage(void); 82 83 int 84 main(int argc, char **argv) 85 { 86 struct iso_args args; 87 int ch, mntflags, opts; 88 char *dev, *dir, mntpath[MAXPATHLEN]; 89 struct vfsconf vfc; 90 int error, verbose; 91 92 mntflags = opts = verbose = 0; 93 memset(&args, 0, sizeof args); 94 args.ssector = -1; 95 while ((ch = getopt(argc, argv, "egjo:rs:v")) != -1) 96 switch (ch) { 97 case 'e': 98 opts |= ISOFSMNT_EXTATT; 99 break; 100 case 'g': 101 opts |= ISOFSMNT_GENS; 102 break; 103 case 'j': 104 opts |= ISOFSMNT_NOJOLIET; 105 break; 106 case 'o': 107 getmntopts(optarg, mopts, &mntflags, &opts); 108 break; 109 case 'r': 110 opts |= ISOFSMNT_NORRIP; 111 break; 112 case 's': 113 args.ssector = atoi(optarg); 114 break; 115 case 'v': 116 verbose++; 117 break; 118 case '?': 119 default: 120 usage(); 121 } 122 argc -= optind; 123 argv += optind; 124 125 if (argc != 2) 126 usage(); 127 128 dev = argv[0]; 129 dir = argv[1]; 130 131 /* 132 * Resolve the mountpoint with realpath(3) and remove unnecessary 133 * slashes from the devicename if there are any. 134 */ 135 (void)checkpath(dir, mntpath); 136 (void)rmslashes(dev, dev); 137 138 #define DEFAULT_ROOTUID -2 139 /* 140 * ISO 9660 filesystems are not writeable. 141 */ 142 mntflags |= MNT_RDONLY; 143 args.export.ex_flags = MNT_EXRDONLY; 144 args.fspec = dev; 145 args.export.ex_root = DEFAULT_ROOTUID; 146 args.flags = opts; 147 148 if (args.ssector == -1) { 149 /* 150 * The start of the session has not been specified on 151 * the command line. If we can successfully read the 152 * TOC of a CD-ROM, use the last data track we find. 153 * Otherwise, just use 0, in order to mount the very 154 * first session. This is compatible with the 155 * historic behaviour of mount_cd9660(8). If the user 156 * has specified -s <ssector> above, we don't get here 157 * and leave the user's will. 158 */ 159 if ((args.ssector = get_ssector(dev)) == -1) { 160 if (verbose) 161 printf("could not determine starting sector, " 162 "using very first session\n"); 163 args.ssector = 0; 164 } else if (verbose) 165 printf("using starting sector %d\n", args.ssector); 166 } 167 168 error = getvfsbyname("cd9660", &vfc); 169 if (error && vfsisloadable("cd9660")) { 170 if (vfsload("cd9660")) 171 err(EX_OSERR, "vfsload(cd9660)"); 172 endvfsent(); /* flush cache */ 173 error = getvfsbyname("cd9660", &vfc); 174 } 175 if (error) 176 errx(1, "cd9660 filesystem is not available"); 177 178 if (mount(vfc.vfc_name, mntpath, mntflags, &args) < 0) 179 err(1, NULL); 180 exit(0); 181 } 182 183 void 184 usage(void) 185 { 186 (void)fprintf(stderr, 187 "usage: mount_cd9660 [-egrv] [-o options] [-s startsector] special node\n"); 188 exit(EX_USAGE); 189 } 190 191 int 192 get_ssector(const char *dev) 193 { 194 struct ioc_toc_header h; 195 struct ioc_read_toc_entry t; 196 struct cd_toc_entry toc_buffer[100]; 197 int fd, ntocentries, i; 198 199 if ((fd = open(dev, O_RDONLY)) == -1) 200 return -1; 201 if (ioctl(fd, CDIOREADTOCHEADER, &h) == -1) { 202 close(fd); 203 return -1; 204 } 205 206 ntocentries = h.ending_track - h.starting_track + 1; 207 if (ntocentries > 100) { 208 /* unreasonable, only 100 allowed */ 209 close(fd); 210 return -1; 211 } 212 t.address_format = CD_LBA_FORMAT; 213 t.starting_track = 0; 214 t.data_len = ntocentries * sizeof(struct cd_toc_entry); 215 t.data = toc_buffer; 216 217 if (ioctl(fd, CDIOREADTOCENTRYS, (char *) &t) == -1) { 218 close(fd); 219 return -1; 220 } 221 close(fd); 222 223 for (i = ntocentries - 1; i >= 0; i--) 224 if ((toc_buffer[i].control & 4) != 0) 225 /* found a data track */ 226 break; 227 if (i < 0) 228 return -1; 229 230 return ntohl(toc_buffer[i].addr.lba); 231 } 232