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 <arpa/inet.h> 62 63 #include <err.h> 64 #include <errno.h> 65 #include <stdlib.h> 66 #include <stdio.h> 67 #include <string.h> 68 #include <sysexits.h> 69 #include <unistd.h> 70 71 #include "mntopts.h" 72 73 struct mntopt mopts[] = { 74 MOPT_STDOPTS, 75 MOPT_UPDATE, 76 { "extatt", 0, ISOFSMNT_EXTATT, 1 }, 77 { "gens", 0, ISOFSMNT_GENS, 1 }, 78 { "rrip", 1, ISOFSMNT_NORRIP, 1 }, 79 { "joliet", 1, ISOFSMNT_NOJOLIET, 1 }, 80 { "strictjoliet", 1, ISOFSMNT_BROKENJOLIET, 1 }, 81 { NULL } 82 }; 83 84 int get_ssector(const char *dev); 85 void usage(void); 86 87 int 88 main(int argc, char **argv) 89 { 90 struct iso_args args; 91 int ch, mntflags, opts; 92 char *dev, *dir, mntpath[MAXPATHLEN]; 93 int verbose; 94 95 mntflags = opts = verbose = 0; 96 memset(&args, 0, sizeof args); 97 args.ssector = -1; 98 while ((ch = getopt(argc, argv, "begjo:rs:v")) != -1) 99 switch (ch) { 100 case 'b': 101 opts |= ISOFSMNT_BROKENJOLIET; 102 break; 103 case 'e': 104 opts |= ISOFSMNT_EXTATT; 105 break; 106 case 'g': 107 opts |= ISOFSMNT_GENS; 108 break; 109 case 'j': 110 opts |= ISOFSMNT_NOJOLIET; 111 break; 112 case 'o': 113 getmntopts(optarg, mopts, &mntflags, &opts); 114 break; 115 case 'r': 116 opts |= ISOFSMNT_NORRIP; 117 break; 118 case 's': 119 args.ssector = atoi(optarg); 120 break; 121 case 'v': 122 verbose++; 123 break; 124 case '?': 125 default: 126 usage(); 127 } 128 argc -= optind; 129 argv += optind; 130 131 if (argc != 2) 132 usage(); 133 134 dev = argv[0]; 135 dir = argv[1]; 136 137 /* 138 * Resolve the mountpoint with realpath(3) and remove unnecessary 139 * slashes from the devicename if there are any. 140 */ 141 (void)checkpath(dir, mntpath); 142 (void)rmslashes(dev, dev); 143 144 #define DEFAULT_ROOTUID -2 145 /* 146 * ISO 9660 file systems are not writeable. 147 */ 148 mntflags |= MNT_RDONLY; 149 args.export.ex_flags = MNT_EXRDONLY; 150 args.fspec = dev; 151 args.export.ex_root = DEFAULT_ROOTUID; 152 args.flags = opts; 153 154 if (args.ssector == -1) { 155 /* 156 * The start of the session has not been specified on 157 * the command line. If we can successfully read the 158 * TOC of a CD-ROM, use the last data track we find. 159 * Otherwise, just use 0, in order to mount the very 160 * first session. This is compatible with the 161 * historic behaviour of mount_cd9660(8). If the user 162 * has specified -s <ssector> above, we don't get here 163 * and leave the user's will. 164 */ 165 if ((args.ssector = get_ssector(dev)) == -1) { 166 if (verbose) 167 printf("could not determine starting sector, " 168 "using very first session\n"); 169 args.ssector = 0; 170 } else if (verbose) 171 printf("using starting sector %d\n", args.ssector); 172 } 173 174 if (mount("cd9660", mntpath, mntflags, &args) < 0) 175 err(1, "%s", args.fspec); 176 exit(0); 177 } 178 179 void 180 usage(void) 181 { 182 (void)fprintf(stderr, 183 "usage: mount_cd9660 [-egrv] [-o options] [-s startsector] special node\n"); 184 exit(EX_USAGE); 185 } 186 187 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