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 * $FreeBSD: src/sbin/mount_cd9660/mount_cd9660.c,v 1.15.2.3 2001/03/14 12:05:01 bp Exp $ 36 */ 37 38 #include <sys/cdio.h> 39 #include <sys/param.h> 40 #include <sys/mount.h> 41 #include <sys/iconv.h> 42 #include <sys/linker.h> 43 #include <sys/module.h> 44 #include <vfs/isofs/cd9660/cd9660_mount.h> 45 46 #include <ctype.h> 47 #include <err.h> 48 #include <errno.h> 49 #include <fcntl.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 <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 gid_t a_gid(const char *); 72 static uid_t a_uid(const char *); 73 static mode_t a_mask(const char *); 74 static int set_charset(struct iso_args *args, const char *cs_local); 75 static int get_ssector(const char *dev); 76 static void usage(void); 77 78 int 79 main(int argc, char **argv) 80 { 81 struct stat sb; 82 struct iso_args args; 83 int ch, mntflags, opts, set_mask, set_dirmask; 84 char *dev, *dir, mntpath[MAXPATHLEN]; 85 struct vfsconf vfc; 86 int error, verbose; 87 const char *cs_local; 88 89 mntflags = opts = set_mask = set_dirmask = verbose = 0; 90 memset(&args, 0, sizeof args); 91 args.ssector = -1; 92 while ((ch = getopt(argc, argv, "bC:egG:jm:M:o:rs:U:v")) != -1) 93 switch (ch) { 94 case 'b': 95 opts |= ISOFSMNT_BROKENJOLIET; 96 break; 97 case 'C': 98 cs_local = kiconv_quirkcs(optarg, KICONV_VENDOR_MICSFT); 99 if (set_charset(&args, cs_local) == -1) 100 err(EX_OSERR, "cd9660_iconv"); 101 opts |= ISOFSMNT_KICONV; 102 break; 103 case 'e': 104 opts |= ISOFSMNT_EXTATT; 105 break; 106 case 'g': 107 opts |= ISOFSMNT_GENS; 108 break; 109 case 'G': 110 opts |= ISOFSMNT_GID; 111 args.gid = a_gid(optarg); 112 break; 113 case 'j': 114 opts |= ISOFSMNT_NOJOLIET; 115 break; 116 case 'm': 117 args.fmask = a_mask(optarg); 118 set_mask = 1; 119 break; 120 case 'M': 121 args.dmask = a_mask(optarg); 122 set_dirmask = 1; 123 break; 124 case 'o': 125 getmntopts(optarg, mopts, &mntflags, &opts); 126 break; 127 case 'r': 128 opts |= ISOFSMNT_NORRIP; 129 break; 130 case 's': 131 args.ssector = atoi(optarg); 132 break; 133 case 'U': 134 opts |= ISOFSMNT_UID; 135 args.uid = a_uid(optarg); 136 break; 137 case 'v': 138 verbose++; 139 break; 140 case '?': 141 default: 142 usage(); 143 } 144 argc -= optind; 145 argv += optind; 146 147 if (argc != 2) 148 usage(); 149 150 if (set_mask && !set_dirmask) { 151 args.dmask = args.fmask; 152 set_dirmask = 1; 153 } else if (set_dirmask && !set_mask) { 154 args.fmask = args.dmask; 155 set_mask = 1; 156 } 157 158 dev = argv[0]; 159 dir = argv[1]; 160 161 /* 162 * Resolve the mountpoint with realpath(3) and remove unnecessary 163 * slashes from the devicename if there are any. 164 */ 165 checkpath(dir, mntpath); 166 rmslashes(dev, dev); 167 168 #define DEFAULT_ROOTUID -2 169 /* 170 * ISO 9660 filesystems are not writeable. 171 */ 172 mntflags |= MNT_RDONLY; 173 args.export.ex_flags = MNT_EXRDONLY; 174 args.fspec = dev; 175 args.export.ex_root = DEFAULT_ROOTUID; 176 args.flags = opts; 177 178 if (args.ssector == -1) { 179 /* 180 * The start of the session has not been specified on 181 * the command line. If we can successfully read the 182 * TOC of a CD-ROM, use the last data track we find. 183 * Otherwise, just use 0, in order to mount the very 184 * first session. This is compatible with the 185 * historic behaviour of mount_cd9660(8). If the user 186 * has specified -s <ssector> above, we don't get here 187 * and leave the user's will. 188 */ 189 if ((args.ssector = get_ssector(dev)) == -1) { 190 if (verbose) 191 printf("could not determine starting sector, " 192 "using very first session\n"); 193 args.ssector = 0; 194 } else if (verbose) 195 printf("using starting sector %d\n", args.ssector); 196 } 197 198 if (!set_mask) { 199 if (stat(mntpath, &sb) == -1) 200 err(EX_OSERR, "stat %s", mntpath); 201 args.fmask = args.dmask = 202 sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); 203 } 204 205 error = getvfsbyname("cd9660", &vfc); 206 if (error && vfsisloadable("cd9660")) { 207 if (vfsload("cd9660")) 208 err(EX_OSERR, "vfsload(cd9660)"); 209 endvfsent(); /* flush cache */ 210 error = getvfsbyname("cd9660", &vfc); 211 } 212 if (error) 213 errx(1, "cd9660 filesystem is not available"); 214 215 if (mount(vfc.vfc_name, mntpath, mntflags, &args) < 0) 216 err(1, "%s", args.fspec); 217 exit(0); 218 } 219 220 static int 221 set_charset(struct iso_args *args, const char *cs_local) 222 { 223 if (modfind("cd9660_iconv") < 0) { 224 if (kldload("cd9660_iconv") < 0 || 225 modfind("cd9660_iconv") < 0) { 226 warnx("cannot find or load \"cd9660_iconv\" " 227 "kernel module"); 228 return (-1); 229 } 230 } 231 232 snprintf(args->cs_disk, sizeof(args->cs_disk), "%s", ENCODING_UNICODE); 233 snprintf(args->cs_local, sizeof(args->cs_local), "%s", cs_local); 234 if (kiconv_add_xlat16_cspairs(args->cs_disk, args->cs_local) != 0) 235 return (-1); 236 237 return (0); 238 } 239 240 static void 241 usage(void) 242 { 243 fprintf(stderr, 244 "usage: mount_cd9660 [-begjrv] [-C charset] [-G gid] [-m mask]\n" 245 " [-M mask] [-o options] [-s startsector]\n" 246 " [-U uid] special_node\n"); 247 exit(EX_USAGE); 248 } 249 250 static int 251 get_ssector(const char *dev) 252 { 253 struct ioc_toc_header h; 254 struct ioc_read_toc_entry t; 255 struct cd_toc_entry toc_buffer[100]; 256 int fd, ntocentries, i; 257 258 if ((fd = open(dev, O_RDONLY)) == -1) 259 return -1; 260 if (ioctl(fd, CDIOREADTOCHEADER, &h) == -1) { 261 close(fd); 262 return -1; 263 } 264 265 ntocentries = h.ending_track - h.starting_track + 1; 266 if (ntocentries > 100) { 267 /* unreasonable, only 100 allowed */ 268 close(fd); 269 return -1; 270 } 271 t.address_format = CD_LBA_FORMAT; 272 t.starting_track = 0; 273 t.data_len = ntocentries * sizeof(struct cd_toc_entry); 274 t.data = toc_buffer; 275 276 if (ioctl(fd, CDIOREADTOCENTRYS, (char *) &t) == -1) { 277 close(fd); 278 return -1; 279 } 280 close(fd); 281 282 for (i = ntocentries - 1; i >= 0; i--) 283 if ((toc_buffer[i].control & 4) != 0) 284 /* found a data track */ 285 break; 286 if (i < 0) 287 return -1; 288 289 return ntohl(toc_buffer[i].addr.lba); 290 } 291 292 static gid_t 293 a_gid(const char *s) 294 { 295 struct group *gr; 296 const char *gname; 297 gid_t gid; 298 299 if ((gr = getgrnam(s)) != NULL) { 300 gid = gr->gr_gid; 301 } else { 302 for (gname = s; *s && isdigit(*s); ++s) 303 ; 304 if (!*s) 305 gid = atoi(gname); 306 else 307 errx(EX_NOUSER, "unknown group id: %s", gname); 308 } 309 return (gid); 310 } 311 312 static uid_t 313 a_uid(const char *s) 314 { 315 struct passwd *pw; 316 const char *uname; 317 uid_t uid; 318 319 if ((pw = getpwnam(s)) != NULL) { 320 uid = pw->pw_uid; 321 } else { 322 for (uname = s; *s && isdigit(*s); ++s) 323 ; 324 if (!*s) 325 uid = atoi(uname); 326 else 327 errx(EX_NOUSER, "unknown user id: %s", uname); 328 } 329 return (uid); 330 } 331 332 static mode_t 333 a_mask(const char *s) 334 { 335 int done, rv; 336 char *ep; 337 338 done = 0; 339 rv = -1; 340 if (*s >= '0' && *s <= '7') { 341 done = 1; 342 rv = strtol(optarg, &ep, 8); 343 } 344 if (!done || rv < 0 || *ep) 345 errx(EX_USAGE, "invalid file mode: %s", s); 346 return (rv); 347 } 348