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 <ctype.h> 48 #include <err.h> 49 #include <errno.h> 50 #include <grp.h> 51 #include <mntopts.h> 52 #include <pwd.h> 53 #include <stdlib.h> 54 #include <stdio.h> 55 #include <string.h> 56 #include <sysexits.h> 57 #include <unistd.h> 58 59 static struct mntopt mopts[] = { 60 MOPT_STDOPTS, 61 MOPT_UPDATE, 62 MOPT_END 63 }; 64 65 static gid_t a_gid(const char *); 66 static uid_t a_uid(const char *); 67 static mode_t a_mask(const char *); 68 static int get_ssector(const char *dev); 69 static int set_charset(struct iovec **, int *iovlen, const char *); 70 void usage(void); 71 72 int 73 main(int argc, char **argv) 74 { 75 struct iovec *iov; 76 int iovlen; 77 int ch, mntflags; 78 char *dev, *dir, *p, *val, mntpath[MAXPATHLEN]; 79 int verbose; 80 int ssector; /* starting sector, 0 for 1st session */ 81 char fstype[] = "cd9660"; 82 83 iov = NULL; 84 iovlen = 0; 85 mntflags = verbose = 0; 86 ssector = -1; 87 88 while ((ch = getopt(argc, argv, "begG:jm:M:o:rs:U:vC:")) != -1) 89 switch (ch) { 90 case 'b': 91 build_iovec(&iov, &iovlen, "brokenjoliet", NULL, (size_t)-1); 92 break; 93 case 'e': 94 build_iovec(&iov, &iovlen, "extatt", NULL, (size_t)-1); 95 break; 96 case 'g': 97 build_iovec(&iov, &iovlen, "gens", NULL, (size_t)-1); 98 break; 99 case 'G': 100 build_iovec_argf(&iov, &iovlen, "gid", "%d", a_gid(optarg)); 101 break; 102 case 'm': 103 build_iovec_argf(&iov, &iovlen, "mask", "%u", a_mask(optarg)); 104 break; 105 case 'M': 106 build_iovec_argf(&iov, &iovlen, "dirmask", "%u", a_mask(optarg)); 107 break; 108 case 'j': 109 build_iovec(&iov, &iovlen, "nojoliet", NULL, (size_t)-1); 110 break; 111 case 'o': 112 getmntopts(optarg, mopts, &mntflags, NULL); 113 p = strchr(optarg, '='); 114 val = NULL; 115 if (p != NULL) { 116 *p = '\0'; 117 val = p + 1; 118 } 119 build_iovec(&iov, &iovlen, optarg, val, (size_t)-1); 120 break; 121 case 'r': 122 build_iovec(&iov, &iovlen, "norrip", NULL, (size_t)-1); 123 break; 124 case 's': 125 ssector = atoi(optarg); 126 break; 127 case 'U': 128 build_iovec_argf(&iov, &iovlen, "uid", "%d", a_uid(optarg)); 129 break; 130 case 'v': 131 verbose++; 132 break; 133 case 'C': 134 if (set_charset(&iov, &iovlen, optarg) == -1) 135 err(EX_OSERR, "cd9660_iconv"); 136 build_iovec(&iov, &iovlen, "kiconv", NULL, (size_t)-1); 137 break; 138 case '?': 139 default: 140 usage(); 141 } 142 argc -= optind; 143 argv += optind; 144 145 if (argc != 2) 146 usage(); 147 148 dev = argv[0]; 149 dir = argv[1]; 150 151 /* 152 * Resolve the mountpoint with realpath(3) and remove unnecessary 153 * slashes from the devicename if there are any. 154 */ 155 if (checkpath(dir, mntpath) != 0) 156 err(1, "%s", mntpath); 157 (void)rmslashes(dev, dev); 158 159 if (ssector == -1) { 160 /* 161 * The start of the session has not been specified on 162 * the command line. If we can successfully read the 163 * TOC of a CD-ROM, use the last data track we find. 164 * Otherwise, just use 0, in order to mount the very 165 * first session. This is compatible with the 166 * historic behaviour of mount_cd9660(8). If the user 167 * has specified -s <ssector> above, we don't get here 168 * and leave the user's will. 169 */ 170 if ((ssector = get_ssector(dev)) == -1) { 171 if (verbose) 172 printf("could not determine starting sector, " 173 "using very first session\n"); 174 ssector = 0; 175 } else if (verbose) 176 printf("using starting sector %d\n", ssector); 177 } 178 mntflags |= MNT_RDONLY; 179 build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1); 180 build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1); 181 build_iovec(&iov, &iovlen, "from", dev, (size_t)-1); 182 build_iovec_argf(&iov, &iovlen, "ssector", "%d", ssector); 183 184 if (nmount(iov, iovlen, mntflags) < 0) 185 err(1, "%s", dev); 186 exit(0); 187 } 188 189 void 190 usage(void) 191 { 192 (void)fprintf(stderr, 193 "usage: mount_cd9660 [-begjrv] [-C charset] [-G gid] [-m mask] [-M mask]\n" 194 " [-o options] [-U uid] [-s startsector] special node\n"); 195 exit(EX_USAGE); 196 } 197 198 static int 199 get_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 } 239 240 static int 241 set_charset(struct iovec **iov, int *iovlen, const char *localcs) 242 { 243 int error; 244 char *cs_disk; /* disk charset for Joliet cs conversion */ 245 char *cs_local; /* local charset for Joliet cs conversion */ 246 247 cs_disk = NULL; 248 cs_local = NULL; 249 250 if (modfind("cd9660_iconv") < 0) 251 if (kldload("cd9660_iconv") < 0 || modfind("cd9660_iconv") < 0) { 252 warnx( "cannot find or load \"cd9660_iconv\" kernel module"); 253 return (-1); 254 } 255 256 if ((cs_disk = malloc(ICONV_CSNMAXLEN)) == NULL) 257 return (-1); 258 if ((cs_local = malloc(ICONV_CSNMAXLEN)) == NULL) { 259 free(cs_disk); 260 return (-1); 261 } 262 strncpy(cs_disk, ENCODING_UNICODE, ICONV_CSNMAXLEN); 263 strncpy(cs_local, kiconv_quirkcs(localcs, KICONV_VENDOR_MICSFT), 264 ICONV_CSNMAXLEN); 265 error = kiconv_add_xlat16_cspairs(cs_disk, cs_local); 266 if (error) 267 return (-1); 268 269 build_iovec(iov, iovlen, "cs_disk", cs_disk, (size_t)-1); 270 build_iovec(iov, iovlen, "cs_local", cs_local, (size_t)-1); 271 272 return (0); 273 } 274 275 static gid_t 276 a_gid(const char *s) 277 { 278 struct group *gr; 279 const char *gname; 280 gid_t gid; 281 282 if ((gr = getgrnam(s)) != NULL) 283 gid = gr->gr_gid; 284 else { 285 for (gname = s; *s && isdigit(*s); ++s); 286 if (!*s) 287 gid = atoi(gname); 288 else 289 errx(EX_NOUSER, "unknown group id: %s", gname); 290 } 291 return (gid); 292 } 293 294 static uid_t 295 a_uid(const char *s) 296 { 297 struct passwd *pw; 298 const char *uname; 299 uid_t uid; 300 301 if ((pw = getpwnam(s)) != NULL) 302 uid = pw->pw_uid; 303 else { 304 for (uname = s; *s && isdigit(*s); ++s); 305 if (!*s) 306 uid = atoi(uname); 307 else 308 errx(EX_NOUSER, "unknown user id: %s", uname); 309 } 310 return (uid); 311 } 312 313 static mode_t 314 a_mask(const char *s) 315 { 316 int done, rv; 317 char *ep; 318 319 done = 0; 320 rv = -1; 321 if (*s >= '0' && *s <= '7') { 322 done = 1; 323 rv = strtol(optarg, &ep, 8); 324 } 325 if (!done || rv < 0 || *ep) 326 errx(EX_USAGE, "invalid file mode: %s", s); 327 return (rv); 328 } 329