mount_cd9660.c revision 122080
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 42static const 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/* 49static char sccsid[] = "@(#)mount_cd9660.c 8.7 (Berkeley) 5/1/95"; 50*/ 51static const char rcsid[] = 52 "$FreeBSD: head/sbin/mount_cd9660/mount_cd9660.c 122080 2003-11-04 21:04:14Z trhodes $"; 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#include <sys/module.h> 61#include <sys/iconv.h> 62#include <sys/linker.h> 63 64#include <arpa/inet.h> 65 66#include <err.h> 67#include <errno.h> 68#include <stdlib.h> 69#include <stdio.h> 70#include <string.h> 71#include <sysexits.h> 72#include <unistd.h> 73 74#include "mntopts.h" 75 76struct mntopt mopts[] = { 77 MOPT_STDOPTS, 78 MOPT_UPDATE, 79 { "extatt", 0, ISOFSMNT_EXTATT, 1 }, 80 { "gens", 0, ISOFSMNT_GENS, 1 }, 81 { "rrip", 1, ISOFSMNT_NORRIP, 1 }, 82 { "joliet", 1, ISOFSMNT_NOJOLIET, 1 }, 83 { "strictjoliet", 1, ISOFSMNT_BROKENJOLIET, 1 }, 84 { NULL } 85}; 86 87int get_ssector(const char *dev); 88int set_charset(struct iso_args *, const char *); 89void usage(void); 90 91int 92main(int argc, char **argv) 93{ 94 struct iso_args args; 95 int ch, mntflags, opts; 96 char *dev, *dir, mntpath[MAXPATHLEN]; 97 int verbose; 98 99 mntflags = opts = verbose = 0; 100 memset(&args, 0, sizeof args); 101 args.ssector = -1; 102 args.cs_disk = NULL; 103 args.cs_local = NULL; 104 while ((ch = getopt(argc, argv, "begjo:rs:vC:")) != -1) 105 switch (ch) { 106 case 'b': 107 opts |= ISOFSMNT_BROKENJOLIET; 108 break; 109 case 'e': 110 opts |= ISOFSMNT_EXTATT; 111 break; 112 case 'g': 113 opts |= ISOFSMNT_GENS; 114 break; 115 case 'j': 116 opts |= ISOFSMNT_NOJOLIET; 117 break; 118 case 'o': 119 getmntopts(optarg, mopts, &mntflags, &opts); 120 break; 121 case 'r': 122 opts |= ISOFSMNT_NORRIP; 123 break; 124 case 's': 125 args.ssector = atoi(optarg); 126 break; 127 case 'v': 128 verbose++; 129 break; 130 case 'C': 131 if (set_charset(&args, optarg) == -1) 132 err(EX_OSERR, "cd9660_iconv"); 133 opts |= ISOFSMNT_KICONV; 134 break; 135 case '?': 136 default: 137 usage(); 138 } 139 argc -= optind; 140 argv += optind; 141 142 if (argc != 2) 143 usage(); 144 145 dev = argv[0]; 146 dir = argv[1]; 147 148 /* 149 * Resolve the mountpoint with realpath(3) and remove unnecessary 150 * slashes from the devicename if there are any. 151 */ 152 (void)checkpath(dir, mntpath); 153 (void)rmslashes(dev, dev); 154 155#define DEFAULT_ROOTUID -2 156 /* 157 * ISO 9660 file systems are not writeable. 158 */ 159 mntflags |= MNT_RDONLY; 160 args.export.ex_flags = MNT_EXRDONLY; 161 args.fspec = dev; 162 args.export.ex_root = DEFAULT_ROOTUID; 163 args.flags = opts; 164 165 if (args.ssector == -1) { 166 /* 167 * The start of the session has not been specified on 168 * the command line. If we can successfully read the 169 * TOC of a CD-ROM, use the last data track we find. 170 * Otherwise, just use 0, in order to mount the very 171 * first session. This is compatible with the 172 * historic behaviour of mount_cd9660(8). If the user 173 * has specified -s <ssector> above, we don't get here 174 * and leave the user's will. 175 */ 176 if ((args.ssector = get_ssector(dev)) == -1) { 177 if (verbose) 178 printf("could not determine starting sector, " 179 "using very first session\n"); 180 args.ssector = 0; 181 } else if (verbose) 182 printf("using starting sector %d\n", args.ssector); 183 } 184 185 if (mount("cd9660", mntpath, mntflags, &args) < 0) 186 err(1, "%s", args.fspec); 187 exit(0); 188} 189 190void 191usage(void) 192{ 193 (void)fprintf(stderr, 194 "usage: mount_cd9660 [-egrv] [-o options] [-s startsector] [-C charset ] special node\n"); 195 exit(EX_USAGE); 196} 197 198int 199get_ssector(const char *dev) 200{ 201 struct ioc_toc_header h; 202 struct ioc_read_toc_entry t; 203 struct cd_toc_entry toc_buffer[100]; 204 int fd, ntocentries, i; 205 206 if ((fd = open(dev, O_RDONLY)) == -1) 207 return -1; 208 if (ioctl(fd, CDIOREADTOCHEADER, &h) == -1) { 209 close(fd); 210 return -1; 211 } 212 213 ntocentries = h.ending_track - h.starting_track + 1; 214 if (ntocentries > 100) { 215 /* unreasonable, only 100 allowed */ 216 close(fd); 217 return -1; 218 } 219 t.address_format = CD_LBA_FORMAT; 220 t.starting_track = 0; 221 t.data_len = ntocentries * sizeof(struct cd_toc_entry); 222 t.data = toc_buffer; 223 224 if (ioctl(fd, CDIOREADTOCENTRYS, (char *) &t) == -1) { 225 close(fd); 226 return -1; 227 } 228 close(fd); 229 230 for (i = ntocentries - 1; i >= 0; i--) 231 if ((toc_buffer[i].control & 4) != 0) 232 /* found a data track */ 233 break; 234 if (i < 0) 235 return -1; 236 237 return ntohl(toc_buffer[i].addr.lba); 238} 239 240int 241set_charset(struct iso_args *args, const char *localcs) 242{ 243 int error; 244 245 if (modfind("cd9660_iconv") < 0) 246 if (kldload("cd9660_iconv") < 0 || modfind("cd9660_iconv") < 0) { 247 warnx( "cannot find or load \"cd9660_iconv\" kernel module"); 248 return (-1); 249 } 250 251 if ((args->cs_disk = malloc(ICONV_CSNMAXLEN)) == NULL) 252 return (-1); 253 if ((args->cs_local = malloc(ICONV_CSNMAXLEN)) == NULL) 254 return (-1); 255 strncpy(args->cs_disk, ENCODING_UNICODE, ICONV_CSNMAXLEN); 256 strncpy(args->cs_local, kiconv_quirkcs(localcs, KICONV_VENDOR_MICSFT), 257 ICONV_CSNMAXLEN); 258 error = kiconv_add_xlat16_cspair(args->cs_local, args->cs_disk, 0); 259 if (error) 260 return (-1); 261 error = kiconv_add_xlat16_cspair(args->cs_disk, args->cs_local, 0); 262 if (error) 263 return (-1); 264 265 return (0); 266} 267