1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1992, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley 8 * by Pace Willisson (pace@blitz.com). The Rock Ridge Extension 9 * Support code is derived from software contributed to Berkeley 10 * by Atsushi Murai (amurai@spec.co.jp). 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/cdio.h> 38 #include <sys/file.h> 39 #include <sys/param.h> 40 #include <sys/mount.h> 41 #include <sys/module.h> 42 #include <sys/iconv.h> 43 #include <sys/linker.h> 44 45 #include <arpa/inet.h> 46 47 #include <err.h> 48 #include <errno.h> 49 #include <stdlib.h> 50 #include <stdio.h> 51 #include <string.h> 52 #include <sysexits.h> 53 #include <unistd.h> 54 55 #include "mntopts.h" 56 57 static struct mntopt mopts[] = { 58 MOPT_STDOPTS, 59 MOPT_UPDATE, 60 MOPT_END 61 }; 62 63 static int get_ssector(const char *dev); 64 static int set_charset(struct iovec **, int *iovlen, const char *); 65 void usage(void); 66 67 int 68 main(int argc, char **argv) 69 { 70 struct iovec *iov; 71 int iovlen; 72 int ch, mntflags; 73 char *dev, *dir, *p, *val, mntpath[MAXPATHLEN]; 74 int verbose; 75 int ssector; /* starting sector, 0 for 1st session */ 76 char fstype[] = "cd9660"; 77 78 iov = NULL; 79 iovlen = 0; 80 mntflags = verbose = 0; 81 ssector = -1; 82 83 while ((ch = getopt(argc, argv, "begjo:rs:vC:")) != -1) 84 switch (ch) { 85 case 'b': 86 build_iovec(&iov, &iovlen, "brokenjoliet", NULL, (size_t)-1); 87 break; 88 case 'e': 89 build_iovec(&iov, &iovlen, "extatt", NULL, (size_t)-1); 90 break; 91 case 'g': 92 build_iovec(&iov, &iovlen, "gens", NULL, (size_t)-1); 93 break; 94 case 'j': 95 build_iovec(&iov, &iovlen, "nojoliet", NULL, (size_t)-1); 96 break; 97 case 'o': 98 getmntopts(optarg, mopts, &mntflags, NULL); 99 p = strchr(optarg, '='); 100 val = NULL; 101 if (p != NULL) { 102 *p = '\0'; 103 val = p + 1; 104 } 105 build_iovec(&iov, &iovlen, optarg, val, (size_t)-1); 106 break; 107 case 'r': 108 build_iovec(&iov, &iovlen, "norrip", NULL, (size_t)-1); 109 break; 110 case 's': 111 ssector = atoi(optarg); 112 break; 113 case 'v': 114 verbose++; 115 break; 116 case 'C': 117 if (set_charset(&iov, &iovlen, optarg) == -1) 118 err(EX_OSERR, "cd9660_iconv"); 119 build_iovec(&iov, &iovlen, "kiconv", NULL, (size_t)-1); 120 break; 121 case '?': 122 default: 123 usage(); 124 } 125 argc -= optind; 126 argv += optind; 127 128 if (argc != 2) 129 usage(); 130 131 dev = argv[0]; 132 dir = argv[1]; 133 134 /* 135 * Resolve the mountpoint with realpath(3) and remove unnecessary 136 * slashes from the devicename if there are any. 137 */ 138 if (checkpath(dir, mntpath) != 0) 139 err(1, "%s", mntpath); 140 (void)rmslashes(dev, dev); 141 142 if (ssector == -1) { 143 /* 144 * The start of the session has not been specified on 145 * the command line. If we can successfully read the 146 * TOC of a CD-ROM, use the last data track we find. 147 * Otherwise, just use 0, in order to mount the very 148 * first session. This is compatible with the 149 * historic behaviour of mount_cd9660(8). If the user 150 * has specified -s <ssector> above, we don't get here 151 * and leave the user's will. 152 */ 153 if ((ssector = get_ssector(dev)) == -1) { 154 if (verbose) 155 printf("could not determine starting sector, " 156 "using very first session\n"); 157 ssector = 0; 158 } else if (verbose) 159 printf("using starting sector %d\n", ssector); 160 } 161 mntflags |= MNT_RDONLY; 162 build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1); 163 build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1); 164 build_iovec(&iov, &iovlen, "from", dev, (size_t)-1); 165 build_iovec_argf(&iov, &iovlen, "ssector", "%d", ssector); 166 167 if (nmount(iov, iovlen, mntflags) < 0) 168 err(1, "%s", dev); 169 exit(0); 170 } 171 172 void 173 usage(void) 174 { 175 (void)fprintf(stderr, 176 "usage: mount_cd9660 [-begjrv] [-C charset] [-o options] [-s startsector]\n" 177 " special node\n"); 178 exit(EX_USAGE); 179 } 180 181 static int 182 get_ssector(const char *dev) 183 { 184 struct ioc_toc_header h; 185 struct ioc_read_toc_entry t; 186 struct cd_toc_entry toc_buffer[100]; 187 int fd, ntocentries, i; 188 189 if ((fd = open(dev, O_RDONLY)) == -1) 190 return -1; 191 if (ioctl(fd, CDIOREADTOCHEADER, &h) == -1) { 192 close(fd); 193 return -1; 194 } 195 196 ntocentries = h.ending_track - h.starting_track + 1; 197 if (ntocentries > 100) { 198 /* unreasonable, only 100 allowed */ 199 close(fd); 200 return -1; 201 } 202 t.address_format = CD_LBA_FORMAT; 203 t.starting_track = 0; 204 t.data_len = ntocentries * sizeof(struct cd_toc_entry); 205 t.data = toc_buffer; 206 207 if (ioctl(fd, CDIOREADTOCENTRYS, (char *) &t) == -1) { 208 close(fd); 209 return -1; 210 } 211 close(fd); 212 213 for (i = ntocentries - 1; i >= 0; i--) 214 if ((toc_buffer[i].control & 4) != 0) 215 /* found a data track */ 216 break; 217 if (i < 0) 218 return -1; 219 220 return ntohl(toc_buffer[i].addr.lba); 221 } 222 223 static int 224 set_charset(struct iovec **iov, int *iovlen, const char *localcs) 225 { 226 int error; 227 char *cs_disk; /* disk charset for Joliet cs conversion */ 228 char *cs_local; /* local charset for Joliet cs conversion */ 229 230 cs_disk = NULL; 231 cs_local = NULL; 232 233 if (modfind("cd9660_iconv") < 0) 234 if (kldload("cd9660_iconv") < 0 || modfind("cd9660_iconv") < 0) { 235 warnx( "cannot find or load \"cd9660_iconv\" kernel module"); 236 return (-1); 237 } 238 239 if ((cs_disk = malloc(ICONV_CSNMAXLEN)) == NULL) 240 return (-1); 241 if ((cs_local = malloc(ICONV_CSNMAXLEN)) == NULL) { 242 free(cs_disk); 243 return (-1); 244 } 245 strncpy(cs_disk, ENCODING_UNICODE, ICONV_CSNMAXLEN); 246 strncpy(cs_local, kiconv_quirkcs(localcs, KICONV_VENDOR_MICSFT), 247 ICONV_CSNMAXLEN); 248 error = kiconv_add_xlat16_cspairs(cs_disk, cs_local); 249 if (error) 250 return (-1); 251 252 build_iovec(iov, iovlen, "cs_disk", cs_disk, (size_t)-1); 253 build_iovec(iov, iovlen, "cs_local", cs_local, (size_t)-1); 254 255 return (0); 256 } 257