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. 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 * @(#) Copyright (c) 1992, 1993, 1994 The Regents of the University of California. All rights reserved. 37 * @(#)mount_cd9660.c 8.7 (Berkeley) 5/1/95 38 * $FreeBSD: src/sbin/mount_cd9660/mount_cd9660.c,v 1.15.2.3 2001/03/14 12:05:01 bp Exp $ 39 */ 40 41 #include <sys/cdio.h> 42 #include <sys/param.h> 43 #include <sys/mount.h> 44 #include <sys/iconv.h> 45 #include <sys/linker.h> 46 #include <sys/module.h> 47 #include <vfs/isofs/cd9660/cd9660_mount.h> 48 49 #include <err.h> 50 #include <errno.h> 51 #include <fcntl.h> 52 #include <mntopts.h> 53 #include <stdlib.h> 54 #include <stdio.h> 55 #include <string.h> 56 #include <locale.h> 57 #include <sysexits.h> 58 #include <unistd.h> 59 60 struct mntopt mopts[] = { 61 MOPT_STDOPTS, 62 MOPT_UPDATE, 63 { "extatt", 0, ISOFSMNT_EXTATT, 1 }, 64 { "gens", 0, ISOFSMNT_GENS, 1 }, 65 { "rrip", 1, ISOFSMNT_NORRIP, 1 }, 66 { "joliet", 1, ISOFSMNT_NOJOLIET, 1 }, 67 { "strictjoliet", 1, ISOFSMNT_BROKENJOLIET, 1 }, 68 MOPT_NULL 69 }; 70 71 static int get_ssector(const char *dev); 72 static void usage(void); 73 int set_charset(struct iso_args *args, const char *cs_local, const char *cs_disk); 74 75 int 76 main(int argc, char **argv) 77 { 78 struct iso_args args; 79 int ch, mntflags, opts; 80 char *dev, *dir, mntpath[MAXPATHLEN]; 81 struct vfsconf vfc; 82 int error, verbose; 83 const char *quirk; 84 char *cs_local = NULL; 85 86 mntflags = opts = verbose = 0; 87 memset(&args, 0, sizeof args); 88 args.ssector = -1; 89 while ((ch = getopt(argc, argv, "begjo:rs:C:v")) != -1) 90 switch (ch) { 91 case 'b': 92 opts |= ISOFSMNT_BROKENJOLIET; 93 break; 94 case 'e': 95 opts |= ISOFSMNT_EXTATT; 96 break; 97 case 'g': 98 opts |= ISOFSMNT_GENS; 99 break; 100 case 'j': 101 opts |= ISOFSMNT_NOJOLIET; 102 break; 103 case 'C': 104 quirk = kiconv_quirkcs(optarg, KICONV_VENDOR_MICSFT); 105 cs_local = strdup(quirk); 106 if (set_charset(&args, cs_local, NULL) == -1) 107 err(EX_OSERR, "cd9660_iconv"); 108 opts |= ISOFSMNT_KICONV; 109 break; 110 case 'o': 111 getmntopts(optarg, mopts, &mntflags, &opts); 112 break; 113 case 'r': 114 opts |= ISOFSMNT_NORRIP; 115 break; 116 case 's': 117 args.ssector = atoi(optarg); 118 break; 119 case 'v': 120 verbose++; 121 break; 122 case '?': 123 default: 124 usage(); 125 } 126 argc -= optind; 127 argv += optind; 128 129 if (argc != 2) 130 usage(); 131 132 dev = argv[0]; 133 dir = argv[1]; 134 135 /* 136 * Resolve the mountpoint with realpath(3) and remove unnecessary 137 * slashes from the devicename if there are any. 138 */ 139 checkpath(dir, mntpath); 140 rmslashes(dev, dev); 141 142 #define DEFAULT_ROOTUID -2 143 /* 144 * ISO 9660 filesystems are not writeable. 145 */ 146 mntflags |= MNT_RDONLY; 147 args.export.ex_flags = MNT_EXRDONLY; 148 args.fspec = dev; 149 args.export.ex_root = DEFAULT_ROOTUID; 150 args.flags = opts; 151 152 if (args.ssector == -1) { 153 /* 154 * The start of the session has not been specified on 155 * the command line. If we can successfully read the 156 * TOC of a CD-ROM, use the last data track we find. 157 * Otherwise, just use 0, in order to mount the very 158 * first session. This is compatible with the 159 * historic behaviour of mount_cd9660(8). If the user 160 * has specified -s <ssector> above, we don't get here 161 * and leave the user's will. 162 */ 163 if ((args.ssector = get_ssector(dev)) == -1) { 164 if (verbose) 165 printf("could not determine starting sector, " 166 "using very first session\n"); 167 args.ssector = 0; 168 } else if (verbose) 169 printf("using starting sector %d\n", args.ssector); 170 } 171 172 error = getvfsbyname("cd9660", &vfc); 173 if (error && vfsisloadable("cd9660")) { 174 if (vfsload("cd9660")) 175 err(EX_OSERR, "vfsload(cd9660)"); 176 endvfsent(); /* flush cache */ 177 error = getvfsbyname("cd9660", &vfc); 178 } 179 if (error) 180 errx(1, "cd9660 filesystem is not available"); 181 182 if (mount(vfc.vfc_name, mntpath, mntflags, &args) < 0) 183 err(1, "%s", args.fspec); 184 exit(0); 185 } 186 187 int 188 set_charset(struct iso_args *args, const char *cs_local, const char *cs_disk) 189 { 190 int error; 191 if (modfind("cd9660_iconv") < 0) { 192 if (kldload("cd9660_iconv") < 0 || modfind("cd9660_iconv") < 0) 193 { 194 warnx("cannot find or load \"cd9660_iconv\" kernel module"); 195 return (-1); 196 } 197 } 198 snprintf(args->cs_local, ICONV_CSNMAXLEN, "%s", cs_local); 199 error = kiconv_add_xlat16_cspairs(ENCODING_UNICODE, cs_local); 200 if (error) 201 return (-1); 202 if (!cs_disk) 203 cs_disk = strdup(ENCODING_UNICODE); 204 snprintf(args->cs_disk, ICONV_CSNMAXLEN, "%s", cs_disk); 205 error = kiconv_add_xlat16_cspairs(cs_disk, cs_local); 206 if (error) 207 return (-1); 208 return (0); 209 } 210 211 212 static void 213 usage(void) 214 { 215 fprintf(stderr, 216 "usage: mount_cd9660 [-begjrv] [-C charset] [-o options] [-s startsector] special node\n"); 217 exit(EX_USAGE); 218 } 219 220 static int 221 get_ssector(const char *dev) 222 { 223 struct ioc_toc_header h; 224 struct ioc_read_toc_entry t; 225 struct cd_toc_entry toc_buffer[100]; 226 int fd, ntocentries, i; 227 228 if ((fd = open(dev, O_RDONLY)) == -1) 229 return -1; 230 if (ioctl(fd, CDIOREADTOCHEADER, &h) == -1) { 231 close(fd); 232 return -1; 233 } 234 235 ntocentries = h.ending_track - h.starting_track + 1; 236 if (ntocentries > 100) { 237 /* unreasonable, only 100 allowed */ 238 close(fd); 239 return -1; 240 } 241 t.address_format = CD_LBA_FORMAT; 242 t.starting_track = 0; 243 t.data_len = ntocentries * sizeof(struct cd_toc_entry); 244 t.data = toc_buffer; 245 246 if (ioctl(fd, CDIOREADTOCENTRYS, (char *) &t) == -1) { 247 close(fd); 248 return -1; 249 } 250 close(fd); 251 252 for (i = ntocentries - 1; i >= 0; i--) 253 if ((toc_buffer[i].control & 4) != 0) 254 /* found a data track */ 255 break; 256 if (i < 0) 257 return -1; 258 259 return ntohl(toc_buffer[i].addr.lba); 260 } 261