1 /*- 2 * Copyright (c) 1980, 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1980, 1989, 1993, 1994 The Regents of the University of California. All rights reserved. 30 * @(#)mount.c 8.25 (Berkeley) 5/8/95 31 * $FreeBSD: src/sbin/mount/mount.c,v 1.39.2.3 2001/08/01 08:26:23 obrien Exp $ 32 */ 33 34 #include <sys/param.h> 35 #include <sys/mount.h> 36 #include <sys/mountctl.h> 37 #define DKTYPENAMES 38 #include <sys/dtype.h> 39 #include <sys/diskslice.h> 40 #include <sys/stat.h> 41 #include <sys/wait.h> 42 43 #include <err.h> 44 #include <errno.h> 45 #include <fcntl.h> 46 #include <fstab.h> 47 #include <mntopts.h> 48 #include <pwd.h> 49 #include <signal.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 55 #include "extern.h" 56 #include "pathnames.h" 57 58 /* `meta' options */ 59 #define MOUNT_META_OPTION_FSTAB "fstab" 60 #define MOUNT_META_OPTION_CURRENT "current" 61 62 int debug, fstab_style, verbose; 63 64 static char *catopt(char *, const char *); 65 static struct statfs 66 *getmntpt(const char *); 67 static int hasopt(const char *, const char *); 68 static int ismounted(struct fstab *, struct statfs *, int); 69 static int isremountable(const char *); 70 static void mangle(char *, int *, const char **); 71 static char *update_options(char *, char *, int); 72 static int mountfs(const char *, const char *, const char *, 73 int, const char *, const char *); 74 static void remopt(char *, const char *); 75 static void printdefvals(const struct statfs *); 76 static void prmount(struct statfs *); 77 static void putfsent(const struct statfs *); 78 static void usage(void); 79 static char *flags2opts(int); 80 static char *xstrdup(const char *str); 81 static void checkdisklabel(const char *devpath, const char **vfstypep); 82 83 /* 84 * List of VFS types that can be remounted without becoming mounted on top 85 * of each other. 86 * XXX Is this list correct? 87 */ 88 static const char *remountable_fs_names[] = { 89 "ufs", "ffs", "ext2fs", "hammer", "hammer2", 90 NULL 91 }; 92 93 int 94 main(int argc, char **argv) 95 { 96 const char *mntfromname, **vfslist, *vfstype; 97 struct fstab *fs; 98 struct statfs *mntbuf; 99 FILE *mountdfp; 100 pid_t pid; 101 int all, ch, i, init_flags, mntsize, rval, have_fstab; 102 char *options; 103 104 all = init_flags = 0; 105 options = NULL; 106 vfslist = NULL; 107 vfstype = "ufs"; 108 while ((ch = getopt(argc, argv, "adF:fo:prwt:uv")) != -1) { 109 switch (ch) { 110 case 'a': 111 all = 1; 112 break; 113 case 'd': 114 debug = 1; 115 break; 116 case 'F': 117 setfstab(optarg); 118 break; 119 case 'f': 120 init_flags |= MNT_FORCE; 121 break; 122 case 'o': 123 if (*optarg) 124 options = catopt(options, optarg); 125 break; 126 case 'p': 127 fstab_style = 1; 128 verbose = 1; 129 break; 130 case 'r': 131 options = catopt(options, "ro"); 132 break; 133 case 't': 134 if (vfslist != NULL) 135 errx(1, "only one -t option may be specified"); 136 vfslist = makevfslist(optarg); 137 vfstype = optarg; 138 break; 139 case 'u': 140 init_flags |= MNT_UPDATE; 141 break; 142 case 'v': 143 verbose = 1; 144 break; 145 case 'w': 146 options = catopt(options, "noro"); 147 break; 148 case '?': 149 default: 150 usage(); 151 /* NOTREACHED */ 152 } 153 } 154 argc -= optind; 155 argv += optind; 156 157 #define BADTYPE(type) \ 158 (strcmp(type, FSTAB_RO) && \ 159 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 160 161 rval = 0; 162 switch (argc) { 163 case 0: 164 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 165 err(1, "getmntinfo"); 166 if (all) { 167 while ((fs = getfsent()) != NULL) { 168 if (BADTYPE(fs->fs_type)) 169 continue; 170 if (checkvfsname(fs->fs_vfstype, vfslist)) 171 continue; 172 if (hasopt(fs->fs_mntops, "noauto")) 173 continue; 174 if (!(init_flags & MNT_UPDATE) && 175 ismounted(fs, mntbuf, mntsize)) 176 continue; 177 options = update_options(options, 178 fs->fs_mntops, mntbuf->f_flags); 179 if (mountfs(fs->fs_vfstype, fs->fs_spec, 180 fs->fs_file, init_flags, options, 181 fs->fs_mntops)) 182 rval = 1; 183 } 184 } else if (fstab_style) { 185 for (i = 0; i < mntsize; i++) { 186 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 187 continue; 188 putfsent(&mntbuf[i]); 189 } 190 } else { 191 for (i = 0; i < mntsize; i++) { 192 if (checkvfsname(mntbuf[i].f_fstypename, 193 vfslist)) 194 continue; 195 prmount(&mntbuf[i]); 196 } 197 } 198 exit(rval); 199 case 1: 200 if (vfslist != NULL) 201 usage(); 202 203 rmslashes(*argv, *argv); 204 205 if (init_flags & MNT_UPDATE) { 206 mntfromname = NULL; 207 have_fstab = 0; 208 if ((mntbuf = getmntpt(*argv)) == NULL) 209 errx(1, "not currently mounted %s", *argv); 210 /* 211 * Only get the mntflags from fstab if both mntpoint 212 * and mntspec are identical. Also handle the special 213 * case where just '/' is mounted and 'spec' is not 214 * identical with the one from fstab ('/dev' is missing 215 * in the spec-string at boot-time). 216 */ 217 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 218 if (strcmp(fs->fs_spec, 219 mntbuf->f_mntfromname) == 0 && 220 strcmp(fs->fs_file, 221 mntbuf->f_mntonname) == 0) { 222 have_fstab = 1; 223 mntfromname = mntbuf->f_mntfromname; 224 } else if (argv[0][0] == '/' && 225 argv[0][1] == '\0') { 226 fs = getfsfile("/"); 227 have_fstab = 1; 228 mntfromname = fs->fs_spec; 229 } 230 } 231 if (have_fstab) { 232 options = update_options(options, fs->fs_mntops, 233 mntbuf->f_flags); 234 } else { 235 mntfromname = mntbuf->f_mntfromname; 236 options = update_options(options, NULL, 237 mntbuf->f_flags); 238 } 239 rval = mountfs(mntbuf->f_fstypename, mntfromname, 240 mntbuf->f_mntonname, init_flags, options, 0); 241 break; 242 } 243 if ((fs = getfsfile(*argv)) == NULL && 244 (fs = getfsspec(*argv)) == NULL) 245 errx(1, "%s: unknown special file or file system", 246 *argv); 247 if (BADTYPE(fs->fs_type)) 248 errx(1, "%s has unknown file system type", 249 *argv); 250 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 251 init_flags, options, fs->fs_mntops); 252 break; 253 case 2: 254 /* 255 * If -t flag has not been specified, the path cannot be 256 * found. 257 * 258 * If the spec is not a file and contains a ':' then assume 259 * NFS. 260 * 261 * If the spec is a cdev attempt to extract the fstype from 262 * the label. 263 * 264 * When all else fails ufs is assumed. 265 */ 266 if (vfslist == NULL) { 267 if (strpbrk(argv[0], ":") != NULL && 268 access(argv[0], 0) == -1) { 269 vfstype = "nfs"; 270 } else { 271 checkdisklabel(argv[0], &vfstype); 272 } 273 } 274 275 rval = mountfs(vfstype, getdevpath(argv[0], 0), argv[1], 276 init_flags, options, NULL); 277 break; 278 default: 279 usage(); 280 /* NOTREACHED */ 281 } 282 283 /* 284 * If the mount was successfully, and done by root, tell mountd the 285 * good news. Pid checks are probably unnecessary, but don't hurt. 286 */ 287 if (rval == 0 && getuid() == 0 && 288 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 289 if (fscanf(mountdfp, "%d", &pid) == 1 && 290 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) 291 err(1, "signal mountd"); 292 fclose(mountdfp); 293 } 294 295 exit(rval); 296 } 297 298 static int 299 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 300 { 301 int i; 302 303 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 304 /* the root file system can always be remounted */ 305 return (0); 306 307 for (i = mntsize - 1; i >= 0; --i) 308 if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 && 309 (!isremountable(fs->fs_vfstype) || 310 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 311 return (1); 312 return (0); 313 } 314 315 static int 316 isremountable(const char *vfsname) 317 { 318 const char **cp; 319 320 for (cp = remountable_fs_names; *cp; cp++) 321 if (strcmp(*cp, vfsname) == 0) 322 return (1); 323 return (0); 324 } 325 326 static int 327 hasopt(const char *mntopts, const char *option) 328 { 329 int negative, found; 330 char *opt, *optbuf; 331 332 if (option[0] == 'n' && option[1] == 'o') { 333 negative = 1; 334 option += 2; 335 } else 336 negative = 0; 337 optbuf = xstrdup(mntopts); 338 found = 0; 339 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 340 if (opt[0] == 'n' && opt[1] == 'o') { 341 if (!strcasecmp(opt + 2, option)) 342 found = negative; 343 } else if (!strcasecmp(opt, option)) 344 found = !negative; 345 } 346 free(optbuf); 347 return (found); 348 } 349 350 static int 351 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 352 const char *options, const char *mntopts) 353 { 354 /* List of directories containing mount_xxx subcommands. */ 355 static const char *edirs[] = { 356 _PATH_SBIN, 357 _PATH_USRSBIN, 358 NULL 359 }; 360 const char *argv[100], **edir; 361 struct statfs sf; 362 pid_t pid; 363 int argc, i, status; 364 char *optbuf; 365 char *argv0; 366 char execname[MAXPATHLEN + 1]; 367 char mntpath[MAXPATHLEN]; 368 369 #if __GNUC__ 370 (void)&optbuf; 371 (void)&name; 372 #endif 373 374 /* resolve the mountpoint with realpath(3) */ 375 checkpath(name, mntpath); 376 name = mntpath; 377 378 if (mntopts == NULL) 379 mntopts = ""; 380 if (options == NULL) { 381 if (*mntopts == '\0') { 382 options = "rw"; 383 } else { 384 options = mntopts; 385 mntopts = ""; 386 } 387 } 388 optbuf = catopt(xstrdup(mntopts), options); 389 390 if (strcmp(name, "/") == 0) 391 flags |= MNT_UPDATE; 392 if (flags & MNT_FORCE) 393 optbuf = catopt(optbuf, "force"); 394 if (flags & MNT_RDONLY) 395 optbuf = catopt(optbuf, "ro"); 396 /* 397 * XXX 398 * The mount_mfs (newfs) command uses -o to select the 399 * optimization mode. We don't pass the default "-o rw" 400 * for that reason. 401 */ 402 if (flags & MNT_UPDATE) 403 optbuf = catopt(optbuf, "update"); 404 405 asprintf(&argv0, "mount_%s", vfstype); 406 407 argc = 0; 408 argv[argc++] = argv0; 409 mangle(optbuf, &argc, argv); 410 argv[argc++] = spec; 411 argv[argc++] = name; 412 argv[argc] = NULL; 413 414 if (debug) { 415 printf("exec: mount_%s", vfstype); 416 for (i = 1; i < argc; i++) 417 printf(" %s", argv[i]); 418 printf("\n"); 419 return (0); 420 } 421 422 switch (pid = fork()) { 423 case -1: /* Error. */ 424 warn("fork"); 425 free(optbuf); 426 return (1); 427 case 0: /* Child. */ 428 /* Go find an executable. */ 429 for (edir = edirs; *edir; edir++) { 430 snprintf(execname, sizeof(execname), 431 "%s/mount_%s", *edir, vfstype); 432 execv(execname, __DECONST(char * const *, argv)); 433 } 434 if (errno == ENOENT) { 435 int len = 0; 436 char *cp; 437 for (edir = edirs; *edir; edir++) 438 len += strlen(*edir) + 2; /* ", " */ 439 if ((cp = malloc(len)) == NULL) 440 errx(1, "malloc failed"); 441 cp[0] = '\0'; 442 for (edir = edirs; *edir; edir++) { 443 strcat(cp, *edir); 444 if (edir[1] != NULL) 445 strcat(cp, ", "); 446 } 447 warn("exec mount_%s not found in %s", vfstype, cp); 448 } 449 exit(1); 450 /* NOTREACHED */ 451 default: /* Parent. */ 452 free(optbuf); 453 454 if (waitpid(pid, &status, 0) < 0) { 455 warn("waitpid"); 456 return (1); 457 } 458 459 if (WIFEXITED(status)) { 460 if (WEXITSTATUS(status) != 0) 461 return (WEXITSTATUS(status)); 462 } else if (WIFSIGNALED(status)) { 463 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 464 return (1); 465 } 466 467 if (verbose) { 468 if (statfs(name, &sf) < 0) { 469 warn("statfs %s", name); 470 return (1); 471 } 472 if (fstab_style) 473 putfsent(&sf); 474 else 475 prmount(&sf); 476 } 477 break; 478 } 479 480 return (0); 481 } 482 483 static void 484 prmount(struct statfs *sfp) 485 { 486 struct passwd *pw; 487 char *buf; 488 int error; 489 int len; 490 491 error = 0; 492 len = 256; 493 494 if ((buf = malloc(len)) == NULL) 495 errx(1, "malloc failed"); 496 497 printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 498 sfp->f_fstypename); 499 500 /* Get a string buffer with all the used flags names */ 501 error = mountctl(sfp->f_mntonname, MOUNTCTL_MOUNTFLAGS, 502 -1, NULL, 0, buf, len); 503 504 if (sfp->f_owner) { 505 printf(", mounted by "); 506 if ((pw = getpwuid(sfp->f_owner)) != NULL) 507 printf("%s", pw->pw_name); 508 else 509 printf("%d", sfp->f_owner); 510 } 511 512 if (error != -1 && strlen(buf)) 513 printf(", %s", buf); 514 515 if (verbose) { 516 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 517 printf(", writes: sync %ld async %ld", 518 sfp->f_syncwrites, sfp->f_asyncwrites); 519 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 520 printf(", reads: sync %ld async %ld", 521 sfp->f_syncreads, sfp->f_asyncreads); 522 } 523 printf(")\n"); 524 } 525 526 static struct statfs * 527 getmntpt(const char *name) 528 { 529 struct statfs *mntbuf; 530 int i, mntsize; 531 532 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 533 for (i = mntsize - 1; i >= 0; i--) { 534 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 535 strcmp(mntbuf[i].f_mntonname, name) == 0) 536 return (&mntbuf[i]); 537 } 538 return (NULL); 539 } 540 541 static char * 542 catopt(char *s0, const char *s1) 543 { 544 size_t i; 545 char *cp; 546 547 if (s1 == NULL || *s1 == '\0') 548 return s0; 549 550 if (s0 && *s0) { 551 i = strlen(s0) + strlen(s1) + 1 + 1; 552 if ((cp = malloc(i)) == NULL) 553 errx(1, "malloc failed"); 554 snprintf(cp, i, "%s,%s", s0, s1); 555 } else 556 cp = xstrdup(s1); 557 558 if (s0) 559 free(s0); 560 return (cp); 561 } 562 563 static void 564 mangle(char *options, int *argcp, const char **argv) 565 { 566 char *p, *s; 567 int argc; 568 569 argc = *argcp; 570 for (s = options; (p = strsep(&s, ",")) != NULL;) 571 if (*p != '\0') { 572 if (*p == '-') { 573 argv[argc++] = p; 574 p = strchr(p, '='); 575 if (p) { 576 *p = '\0'; 577 argv[argc++] = p+1; 578 } 579 } else if (strcmp(p, "rw") != 0) { 580 argv[argc++] = "-o"; 581 argv[argc++] = p; 582 } 583 } 584 585 *argcp = argc; 586 } 587 588 589 static char * 590 update_options(char *opts, char *fstab, int curflags) 591 { 592 char *o, *p; 593 char *cur; 594 char *expopt, *newopt, *tmpopt; 595 596 if (opts == NULL) 597 return xstrdup(""); 598 599 /* remove meta options from list */ 600 remopt(fstab, MOUNT_META_OPTION_FSTAB); 601 remopt(fstab, MOUNT_META_OPTION_CURRENT); 602 cur = flags2opts(curflags); 603 604 /* 605 * Expand all meta-options passed to us first. 606 */ 607 expopt = NULL; 608 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 609 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 610 expopt = catopt(expopt, fstab); 611 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 612 expopt = catopt(expopt, cur); 613 else 614 expopt = catopt(expopt, o); 615 } 616 free(cur); 617 free(opts); 618 619 /* 620 * Remove previous contradictory arguments. Given option "foo" we 621 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 622 * and "foo" - so we can deal with possible options like "notice". 623 */ 624 newopt = NULL; 625 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 626 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 627 errx(1, "malloc failed"); 628 629 strcpy(tmpopt, "no"); 630 strcat(tmpopt, o); 631 remopt(newopt, tmpopt); 632 free(tmpopt); 633 634 if (strncmp("no", o, 2) == 0) 635 remopt(newopt, o+2); 636 637 newopt = catopt(newopt, o); 638 } 639 free(expopt); 640 641 return newopt; 642 } 643 644 static void 645 remopt(char *string, const char *opt) 646 { 647 char *o, *p, *r; 648 649 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 650 return; 651 652 r = string; 653 654 for (p = string; (o = strsep(&p, ",")) != NULL;) { 655 if (strcmp(opt, o) != 0) { 656 if (*r == ',' && *o != '\0') 657 r++; 658 while ((*r++ = *o++) != '\0') 659 ; 660 *--r = ','; 661 } 662 } 663 *r = '\0'; 664 } 665 666 static void 667 usage(void) 668 { 669 670 fprintf(stderr, "%s\n%s\n%s\n", 671 "usage: mount [-adfpruvw] [-F fstab] [-o options] [-t type]", 672 " mount [-dfpruvw] {special | node}", 673 " mount [-dfpruvw] [-o options] [-t type] special node"); 674 exit(1); 675 } 676 677 /* 678 * Prints the default values for dump frequency and pass number of fsck. 679 * This happens when mount(8) is called with -p and there is no fstab file 680 * or there is but the values aren't specified. 681 */ 682 static void 683 printdefvals(const struct statfs *ent) 684 { 685 if (strcmp(ent->f_fstypename, "ufs") == 0) { 686 if (strcmp(ent->f_mntonname, "/") == 0) 687 printf("\t1 1\n"); 688 else 689 printf("\t2 2\n"); 690 } else { 691 printf("\t0 0\n"); 692 } 693 } 694 695 static void 696 putfsent(const struct statfs *ent) 697 { 698 struct stat sb; 699 struct fstab *fst; 700 char *opts; 701 702 opts = flags2opts(ent->f_flags); 703 printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname, 704 ent->f_fstypename, opts); 705 free(opts); 706 707 /* 708 * If fstab file is missing don't call getfsspec() or getfsfile() 709 * at all, because the same warning will be printed twice for every 710 * mounted filesystem. 711 */ 712 if (stat(_PATH_FSTAB, &sb) != -1) { 713 if ((fst = getfsspec(ent->f_mntfromname))) 714 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 715 else if ((fst = getfsfile(ent->f_mntonname))) 716 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 717 else 718 printdefvals(ent); 719 } else { 720 printdefvals(ent); 721 } 722 } 723 724 725 static char * 726 flags2opts(int flags) 727 { 728 char *res; 729 730 res = NULL; 731 732 res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw"); 733 734 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 735 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 736 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 737 if (flags & MNT_NODEV) res = catopt(res, "nodev"); 738 if (flags & MNT_UNION) res = catopt(res, "union"); 739 if (flags & MNT_ASYNC) res = catopt(res, "async"); 740 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 741 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 742 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 743 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 744 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 745 if (flags & MNT_IGNORE) res = catopt(res, "ignore"); 746 747 return res; 748 } 749 750 static char* 751 xstrdup(const char *str) 752 { 753 char* ret = strdup(str); 754 if(ret == NULL) { 755 errx(1, "strdup failed (could not allocate memory)"); 756 } 757 return ret; 758 } 759 760 /* 761 * Hack 'cd9660' for the default fstype on cd media if no disklabel 762 * found. 763 */ 764 static int 765 iscdmedia(const char *path, int fd __unused) 766 { 767 int n; 768 769 if (strrchr(path, '/')) 770 path = strrchr(path, '/') + 1; 771 if (sscanf(path, "acd%d", &n) == 1) 772 return 1; 773 if (sscanf(path, "cd%d", &n) == 1) 774 return 1; 775 return 0; 776 } 777 778 /* 779 * If the device path is a cdev attempt to access the disklabel to determine 780 * the filesystem type. Adjust *vfstypep if we can figure it out 781 * definitively. 782 * 783 * Ignore any portion of the device path after an '@' or ':'. 784 */ 785 static void 786 checkdisklabel(const char *devpath, const char **vfstypep) 787 { 788 struct stat st; 789 struct partinfo info; 790 char *path = strdup(devpath); 791 int fd; 792 793 if (strchr(path, '@')) 794 *strchr(path, '@') = 0; 795 if (strchr(path, ':')) 796 *strchr(path, ':') = 0; 797 798 if (stat(path, &st) < 0) 799 goto done; 800 if (!S_ISCHR(st.st_mode)) 801 goto done; 802 fd = open(path, O_RDONLY); 803 if (fd < 0) 804 goto done; 805 if (ioctl(fd, DIOCGPART, &info) == 0) { 806 if (info.fstype >= 0 && info.fstype < (int)FSMAXTYPES) { 807 if (fstype_to_vfsname[info.fstype]) { 808 *vfstypep = fstype_to_vfsname[info.fstype]; 809 } else if (iscdmedia(path, fd)) { 810 *vfstypep = "cd9660"; 811 } else { 812 fprintf(stderr, 813 "mount: warning: fstype in disklabel " 814 "not set to anything I understand\n"); 815 fprintf(stderr, 816 "attempting to mount with -t ufs\n"); 817 } 818 } 819 } 820 close(fd); 821 done: 822 free(path); 823 } 824