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 <pwd.h> 52 #include <stdlib.h> 53 #include <stdio.h> 54 #include <string.h> 55 #include <sysexits.h> 56 #include <unistd.h> 57 58 #include "mntopts.h" 59 60 static struct mntopt mopts[] = { 61 MOPT_STDOPTS, 62 MOPT_UPDATE, 63 MOPT_END 64 }; 65 66 static gid_t a_gid(const char *); 67 static uid_t a_uid(const char *); 68 static mode_t a_mask(const char *); 69 static int get_ssector(const char *dev); 70 static int set_charset(struct iovec **, int *iovlen, const char *); 71 void usage(void); 72 73 int 74 main(int argc, char **argv) 75 { 76 struct iovec *iov; 77 int iovlen; 78 int ch, mntflags; 79 char *dev, *dir, *p, *val, mntpath[MAXPATHLEN]; 80 int verbose; 81 int ssector; /* starting sector, 0 for 1st session */ 82 char fstype[] = "cd9660"; 83 84 iov = NULL; 85 iovlen = 0; 86 mntflags = verbose = 0; 87 ssector = -1; 88 89 while ((ch = getopt(argc, argv, "begG:jm:M:o:rs:U:vC:")) != -1) 90 switch (ch) { 91 case 'b': 92 build_iovec(&iov, &iovlen, "brokenjoliet", NULL, (size_t)-1); 93 break; 94 case 'e': 95 build_iovec(&iov, &iovlen, "extatt", NULL, (size_t)-1); 96 break; 97 case 'g': 98 build_iovec(&iov, &iovlen, "gens", NULL, (size_t)-1); 99 break; 100 case 'G': 101 build_iovec_argf(&iov, &iovlen, "gid", "%d", a_gid(optarg)); 102 break; 103 case 'm': 104 build_iovec_argf(&iov, &iovlen, "mask", "%u", a_mask(optarg)); 105 break; 106 case 'M': 107 build_iovec_argf(&iov, &iovlen, "dirmask", "%u", a_mask(optarg)); 108 break; 109 case 'j': 110 build_iovec(&iov, &iovlen, "nojoliet", NULL, (size_t)-1); 111 break; 112 case 'o': 113 getmntopts(optarg, mopts, &mntflags, NULL); 114 p = strchr(optarg, '='); 115 val = NULL; 116 if (p != NULL) { 117 *p = '\0'; 118 val = p + 1; 119 } 120 build_iovec(&iov, &iovlen, optarg, val, (size_t)-1); 121 break; 122 case 'r': 123 build_iovec(&iov, &iovlen, "norrip", NULL, (size_t)-1); 124 break; 125 case 's': 126 ssector = atoi(optarg); 127 break; 128 case 'U': 129 build_iovec_argf(&iov, &iovlen, "uid", "%d", a_uid(optarg)); 130 break; 131 case 'v': 132 verbose++; 133 break; 134 case 'C': 135 if (set_charset(&iov, &iovlen, optarg) == -1) 136 err(EX_OSERR, "cd9660_iconv"); 137 build_iovec(&iov, &iovlen, "kiconv", NULL, (size_t)-1); 138 break; 139 case '?': 140 default: 141 usage(); 142 } 143 argc -= optind; 144 argv += optind; 145 146 if (argc != 2) 147 usage(); 148 149 dev = argv[0]; 150 dir = argv[1]; 151 152 /* 153 * Resolve the mountpoint with realpath(3) and remove unnecessary 154 * slashes from the devicename if there are any. 155 */ 156 if (checkpath(dir, mntpath) != 0) 157 err(1, "%s", mntpath); 158 (void)rmslashes(dev, dev); 159 160 if (ssector == -1) { 161 /* 162 * The start of the session has not been specified on 163 * the command line. If we can successfully read the 164 * TOC of a CD-ROM, use the last data track we find. 165 * Otherwise, just use 0, in order to mount the very 166 * first session. This is compatible with the 167 * historic behaviour of mount_cd9660(8). If the user 168 * has specified -s <ssector> above, we don't get here 169 * and leave the user's will. 170 */ 171 if ((ssector = get_ssector(dev)) == -1) { 172 if (verbose) 173 printf("could not determine starting sector, " 174 "using very first session\n"); 175 ssector = 0; 176 } else if (verbose) 177 printf("using starting sector %d\n", ssector); 178 } 179 mntflags |= MNT_RDONLY; 180 build_iovec(&iov, &iovlen, "fstype", fstype, (size_t)-1); 181 build_iovec(&iov, &iovlen, "fspath", mntpath, (size_t)-1); 182 build_iovec(&iov, &iovlen, "from", dev, (size_t)-1); 183 build_iovec_argf(&iov, &iovlen, "ssector", "%d", ssector); 184 185 if (nmount(iov, iovlen, mntflags) < 0) 186 err(1, "%s", dev); 187 exit(0); 188 } 189 190 void 191 usage(void) 192 { 193 (void)fprintf(stderr, 194 "usage: mount_cd9660 [-begjrv] [-C charset] [-G gid] [-m mask] [-M mask]\n" 195 " [-o options] [-U uid] [-s startsector] special node\n"); 196 exit(EX_USAGE); 197 } 198 199 static int 200 get_ssector(const char *dev) 201 { 202 struct ioc_toc_header h; 203 struct ioc_read_toc_entry t; 204 struct cd_toc_entry toc_buffer[100]; 205 int fd, ntocentries, i; 206 207 if ((fd = open(dev, O_RDONLY)) == -1) 208 return -1; 209 if (ioctl(fd, CDIOREADTOCHEADER, &h) == -1) { 210 close(fd); 211 return -1; 212 } 213 214 ntocentries = h.ending_track - h.starting_track + 1; 215 if (ntocentries > 100) { 216 /* unreasonable, only 100 allowed */ 217 close(fd); 218 return -1; 219 } 220 t.address_format = CD_LBA_FORMAT; 221 t.starting_track = 0; 222 t.data_len = ntocentries * sizeof(struct cd_toc_entry); 223 t.data = toc_buffer; 224 225 if (ioctl(fd, CDIOREADTOCENTRYS, (char *) &t) == -1) { 226 close(fd); 227 return -1; 228 } 229 close(fd); 230 231 for (i = ntocentries - 1; i >= 0; i--) 232 if ((toc_buffer[i].control & 4) != 0) 233 /* found a data track */ 234 break; 235 if (i < 0) 236 return -1; 237 238 return ntohl(toc_buffer[i].addr.lba); 239 } 240 241 static int 242 set_charset(struct iovec **iov, int *iovlen, const char *localcs) 243 { 244 int error; 245 char *cs_disk; /* disk charset for Joliet cs conversion */ 246 char *cs_local; /* local charset for Joliet cs conversion */ 247 248 cs_disk = NULL; 249 cs_local = NULL; 250 251 if (modfind("cd9660_iconv") < 0) 252 if (kldload("cd9660_iconv") < 0 || modfind("cd9660_iconv") < 0) { 253 warnx( "cannot find or load \"cd9660_iconv\" kernel module"); 254 return (-1); 255 } 256 257 if ((cs_disk = malloc(ICONV_CSNMAXLEN)) == NULL) 258 return (-1); 259 if ((cs_local = malloc(ICONV_CSNMAXLEN)) == NULL) { 260 free(cs_disk); 261 return (-1); 262 } 263 strncpy(cs_disk, ENCODING_UNICODE, ICONV_CSNMAXLEN); 264 strncpy(cs_local, kiconv_quirkcs(localcs, KICONV_VENDOR_MICSFT), 265 ICONV_CSNMAXLEN); 266 error = kiconv_add_xlat16_cspairs(cs_disk, cs_local); 267 if (error) 268 return (-1); 269 270 build_iovec(iov, iovlen, "cs_disk", cs_disk, (size_t)-1); 271 build_iovec(iov, iovlen, "cs_local", cs_local, (size_t)-1); 272 273 return (0); 274 } 275 276 static gid_t 277 a_gid(const char *s) 278 { 279 struct group *gr; 280 const char *gname; 281 gid_t gid; 282 283 if ((gr = getgrnam(s)) != NULL) 284 gid = gr->gr_gid; 285 else { 286 for (gname = s; *s && isdigit(*s); ++s); 287 if (!*s) 288 gid = atoi(gname); 289 else 290 errx(EX_NOUSER, "unknown group id: %s", gname); 291 } 292 return (gid); 293 } 294 295 static uid_t 296 a_uid(const char *s) 297 { 298 struct passwd *pw; 299 const char *uname; 300 uid_t uid; 301 302 if ((pw = getpwnam(s)) != NULL) 303 uid = pw->pw_uid; 304 else { 305 for (uname = s; *s && isdigit(*s); ++s); 306 if (!*s) 307 uid = atoi(uname); 308 else 309 errx(EX_NOUSER, "unknown user id: %s", uname); 310 } 311 return (uid); 312 } 313 314 static mode_t 315 a_mask(const char *s) 316 { 317 int done, rv; 318 char *ep; 319 320 done = 0; 321 rv = -1; 322 if (*s >= '0' && *s <= '7') { 323 done = 1; 324 rv = strtol(optarg, &ep, 8); 325 } 326 if (!done || rv < 0 || *ep) 327 errx(EX_USAGE, "invalid file mode: %s", s); 328 return (rv); 329 } 330