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 #include <libutil.h> 55 56 #include "extern.h" 57 #include "pathnames.h" 58 59 /* `meta' options */ 60 #define MOUNT_META_OPTION_FSTAB "fstab" 61 #define MOUNT_META_OPTION_CURRENT "current" 62 63 int debug, fstab_style, verbose; 64 65 static char *catopt(char *, const char *); 66 static struct statfs 67 *getmntpt(const char *); 68 static int hasopt(const char *, const char *); 69 static int ismounted(struct fstab *, struct statfs *, int); 70 static int isremountable(const char *); 71 static void mangle(char *, int *, const char **); 72 static char *update_options(char *, char *, int); 73 static int mountfs(const char *, const char *, const char *, 74 int, const char *, const char *); 75 static void remopt(char *, const char *); 76 static void printdefvals(const struct statfs *); 77 static void prmount(struct statfs *); 78 static void putfsent(const struct statfs *); 79 static void usage(void); 80 static char *flags2opts(int); 81 static char *xstrdup(const char *str); 82 static void checkdisklabel(const char *devpath, const char **vfstypep); 83 84 /* 85 * List of VFS types that can be remounted without becoming mounted on top 86 * of each other. 87 * XXX Is this list correct? 88 */ 89 static const char *remountable_fs_names[] = { 90 "ufs", "ffs", "ext2fs", "hammer", "hammer2", 91 NULL 92 }; 93 94 static void 95 restart_mountd(void) 96 { 97 struct pidfh *pfh; 98 pid_t mountdpid; 99 100 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid); 101 if (pfh != NULL) { 102 /* Mountd is not running. */ 103 pidfile_remove(pfh); 104 return; 105 } 106 if (errno != EEXIST) { 107 /* Cannot open pidfile for some reason. */ 108 return; 109 } 110 /* We have mountd(8) PID in mountdpid varible, let's signal it. */ 111 if (kill(mountdpid, SIGUSR1) == -1) 112 err(1, "signal mountd"); 113 } 114 115 int 116 main(int argc, char **argv) 117 { 118 const char *mntfromname, **vfslist, *vfstype; 119 struct fstab *fs; 120 struct statfs *mntbuf; 121 int all, ch, i, init_flags, mntsize, rval, have_fstab; 122 char *options; 123 124 all = init_flags = 0; 125 options = NULL; 126 vfslist = NULL; 127 vfstype = "ufs"; 128 while ((ch = getopt(argc, argv, "adF:fo:prwt:uv")) != -1) { 129 switch (ch) { 130 case 'a': 131 all = 1; 132 break; 133 case 'd': 134 debug = 1; 135 break; 136 case 'F': 137 setfstab(optarg); 138 break; 139 case 'f': 140 init_flags |= MNT_FORCE; 141 break; 142 case 'o': 143 if (*optarg) 144 options = catopt(options, optarg); 145 break; 146 case 'p': 147 fstab_style = 1; 148 verbose = 1; 149 break; 150 case 'r': 151 options = catopt(options, "ro"); 152 break; 153 case 't': 154 if (vfslist != NULL) 155 errx(1, "only one -t option may be specified"); 156 vfslist = makevfslist(optarg); 157 vfstype = optarg; 158 break; 159 case 'u': 160 init_flags |= MNT_UPDATE; 161 break; 162 case 'v': 163 verbose = 1; 164 break; 165 case 'w': 166 options = catopt(options, "noro"); 167 break; 168 case '?': 169 default: 170 usage(); 171 /* NOTREACHED */ 172 } 173 } 174 argc -= optind; 175 argv += optind; 176 177 #define BADTYPE(type) \ 178 (strcmp(type, FSTAB_RO) && \ 179 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 180 181 rval = 0; 182 switch (argc) { 183 case 0: 184 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 185 err(1, "getmntinfo"); 186 if (all) { 187 while ((fs = getfsent()) != NULL) { 188 if (BADTYPE(fs->fs_type)) 189 continue; 190 if (checkvfsname(fs->fs_vfstype, vfslist)) 191 continue; 192 if (hasopt(fs->fs_mntops, "noauto")) 193 continue; 194 if (!(init_flags & MNT_UPDATE) && 195 ismounted(fs, mntbuf, mntsize)) 196 continue; 197 options = update_options(options, 198 fs->fs_mntops, mntbuf->f_flags); 199 if (mountfs(fs->fs_vfstype, fs->fs_spec, 200 fs->fs_file, init_flags, options, 201 fs->fs_mntops)) 202 rval = 1; 203 } 204 } else if (fstab_style) { 205 for (i = 0; i < mntsize; i++) { 206 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 207 continue; 208 putfsent(&mntbuf[i]); 209 } 210 } else { 211 for (i = 0; i < mntsize; i++) { 212 if (checkvfsname(mntbuf[i].f_fstypename, 213 vfslist)) 214 continue; 215 prmount(&mntbuf[i]); 216 } 217 } 218 exit(rval); 219 case 1: 220 if (vfslist != NULL) 221 usage(); 222 223 rmslashes(*argv, *argv); 224 225 if (init_flags & MNT_UPDATE) { 226 mntfromname = NULL; 227 have_fstab = 0; 228 if ((mntbuf = getmntpt(*argv)) == NULL) 229 errx(1, "not currently mounted %s", *argv); 230 /* 231 * Only get the mntflags from fstab if both mntpoint 232 * and mntspec are identical. Also handle the special 233 * case where just '/' is mounted and 'spec' is not 234 * identical with the one from fstab ('/dev' is missing 235 * in the spec-string at boot-time). 236 */ 237 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 238 if (strcmp(fs->fs_spec, 239 mntbuf->f_mntfromname) == 0 && 240 strcmp(fs->fs_file, 241 mntbuf->f_mntonname) == 0) { 242 have_fstab = 1; 243 mntfromname = mntbuf->f_mntfromname; 244 } else if (argv[0][0] == '/' && 245 argv[0][1] == '\0') { 246 fs = getfsfile("/"); 247 have_fstab = 1; 248 mntfromname = fs->fs_spec; 249 } 250 } 251 if (have_fstab) { 252 options = update_options(options, fs->fs_mntops, 253 mntbuf->f_flags); 254 } else { 255 mntfromname = mntbuf->f_mntfromname; 256 options = update_options(options, NULL, 257 mntbuf->f_flags); 258 } 259 rval = mountfs(mntbuf->f_fstypename, mntfromname, 260 mntbuf->f_mntonname, init_flags, options, 0); 261 break; 262 } 263 if ((fs = getfsfile(*argv)) == NULL && 264 (fs = getfsspec(*argv)) == NULL) 265 errx(1, "%s: unknown special file or file system", 266 *argv); 267 if (BADTYPE(fs->fs_type)) 268 errx(1, "%s has unknown file system type", 269 *argv); 270 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 271 init_flags, options, fs->fs_mntops); 272 break; 273 case 2: 274 /* 275 * If -t flag has not been specified, the path cannot be 276 * found. 277 * 278 * If the spec is not a file and contains a ':' then assume 279 * NFS. 280 * 281 * If the spec is a cdev attempt to extract the fstype from 282 * the label. 283 * 284 * When all else fails ufs is assumed. 285 */ 286 if (vfslist == NULL) { 287 if (strpbrk(argv[0], ":") != NULL && 288 access(argv[0], 0) == -1) { 289 vfstype = "nfs"; 290 } else { 291 checkdisklabel(argv[0], &vfstype); 292 } 293 } 294 295 rval = mountfs(vfstype, getdevpath(argv[0], 0), argv[1], 296 init_flags, options, NULL); 297 break; 298 default: 299 usage(); 300 /* NOTREACHED */ 301 } 302 303 /* 304 * If the mount was successfully, and done by root, tell mountd the 305 * good news. 306 */ 307 if (rval == 0 && getuid() == 0) 308 restart_mountd(); 309 310 exit(rval); 311 } 312 313 static int 314 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 315 { 316 int i; 317 318 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 319 /* the root file system can always be remounted */ 320 return (0); 321 322 for (i = mntsize - 1; i >= 0; --i) 323 if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 && 324 (!isremountable(fs->fs_vfstype) || 325 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 326 return (1); 327 return (0); 328 } 329 330 static int 331 isremountable(const char *vfsname) 332 { 333 const char **cp; 334 335 for (cp = remountable_fs_names; *cp; cp++) 336 if (strcmp(*cp, vfsname) == 0) 337 return (1); 338 return (0); 339 } 340 341 static int 342 hasopt(const char *mntopts, const char *option) 343 { 344 int negative, found; 345 char *opt, *optbuf; 346 347 if (option[0] == 'n' && option[1] == 'o') { 348 negative = 1; 349 option += 2; 350 } else 351 negative = 0; 352 optbuf = xstrdup(mntopts); 353 found = 0; 354 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 355 if (opt[0] == 'n' && opt[1] == 'o') { 356 if (!strcasecmp(opt + 2, option)) 357 found = negative; 358 } else if (!strcasecmp(opt, option)) 359 found = !negative; 360 } 361 free(optbuf); 362 return (found); 363 } 364 365 static int 366 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 367 const char *options, const char *mntopts) 368 { 369 /* List of directories containing mount_xxx subcommands. */ 370 static const char *edirs[] = { 371 _PATH_SBIN, 372 _PATH_USRSBIN, 373 NULL 374 }; 375 const char *argv[100], **edir; 376 struct statfs sf; 377 pid_t pid; 378 int argc, i, status; 379 char *optbuf; 380 char *argv0; 381 char execname[MAXPATHLEN + 1]; 382 char mntpath[MAXPATHLEN]; 383 384 #if __GNUC__ 385 (void)&optbuf; 386 (void)&name; 387 #endif 388 389 /* resolve the mountpoint with realpath(3) */ 390 checkpath(name, mntpath); 391 name = mntpath; 392 393 if (mntopts == NULL) 394 mntopts = ""; 395 if (options == NULL) { 396 if (*mntopts == '\0') { 397 options = "rw"; 398 } else { 399 options = mntopts; 400 mntopts = ""; 401 } 402 } 403 optbuf = catopt(xstrdup(mntopts), options); 404 405 if (strcmp(name, "/") == 0) 406 flags |= MNT_UPDATE; 407 if (flags & MNT_FORCE) 408 optbuf = catopt(optbuf, "force"); 409 if (flags & MNT_RDONLY) 410 optbuf = catopt(optbuf, "ro"); 411 /* 412 * XXX 413 * The mount_mfs (newfs) command uses -o to select the 414 * optimization mode. We don't pass the default "-o rw" 415 * for that reason. 416 */ 417 if (flags & MNT_UPDATE) 418 optbuf = catopt(optbuf, "update"); 419 420 asprintf(&argv0, "mount_%s", vfstype); 421 422 argc = 0; 423 argv[argc++] = argv0; 424 mangle(optbuf, &argc, argv); 425 argv[argc++] = spec; 426 argv[argc++] = name; 427 argv[argc] = NULL; 428 429 if (debug) { 430 printf("exec: mount_%s", vfstype); 431 for (i = 1; i < argc; i++) 432 printf(" %s", argv[i]); 433 printf("\n"); 434 return (0); 435 } 436 437 switch (pid = fork()) { 438 case -1: /* Error. */ 439 warn("fork"); 440 free(optbuf); 441 return (1); 442 case 0: /* Child. */ 443 /* Go find an executable. */ 444 for (edir = edirs; *edir; edir++) { 445 snprintf(execname, sizeof(execname), 446 "%s/mount_%s", *edir, vfstype); 447 execv(execname, __DECONST(char * const *, argv)); 448 } 449 if (errno == ENOENT) { 450 int len = 0; 451 char *cp; 452 for (edir = edirs; *edir; edir++) 453 len += strlen(*edir) + 2; /* ", " */ 454 if ((cp = malloc(len)) == NULL) 455 errx(1, "malloc failed"); 456 cp[0] = '\0'; 457 for (edir = edirs; *edir; edir++) { 458 strcat(cp, *edir); 459 if (edir[1] != NULL) 460 strcat(cp, ", "); 461 } 462 warn("exec mount_%s not found in %s", vfstype, cp); 463 } 464 exit(1); 465 /* NOTREACHED */ 466 default: /* Parent. */ 467 free(optbuf); 468 469 if (waitpid(pid, &status, 0) < 0) { 470 warn("waitpid"); 471 return (1); 472 } 473 474 if (WIFEXITED(status)) { 475 if (WEXITSTATUS(status) != 0) 476 return (WEXITSTATUS(status)); 477 } else if (WIFSIGNALED(status)) { 478 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 479 return (1); 480 } 481 482 if (verbose) { 483 if (statfs(name, &sf) < 0) { 484 warn("statfs %s", name); 485 return (1); 486 } 487 if (fstab_style) 488 putfsent(&sf); 489 else 490 prmount(&sf); 491 } 492 break; 493 } 494 495 return (0); 496 } 497 498 static void 499 prmount(struct statfs *sfp) 500 { 501 struct passwd *pw; 502 char *buf; 503 int error; 504 int len; 505 506 error = 0; 507 len = 256; 508 509 if ((buf = malloc(len)) == NULL) 510 errx(1, "malloc failed"); 511 512 printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 513 sfp->f_fstypename); 514 515 /* Get a string buffer with all the used flags names */ 516 error = mountctl(sfp->f_mntonname, MOUNTCTL_MOUNTFLAGS, 517 -1, NULL, 0, buf, len); 518 519 if (sfp->f_owner) { 520 printf(", mounted by "); 521 if ((pw = getpwuid(sfp->f_owner)) != NULL) 522 printf("%s", pw->pw_name); 523 else 524 printf("%d", sfp->f_owner); 525 } 526 527 if (error != -1 && strlen(buf)) 528 printf(", %s", buf); 529 530 if (verbose) { 531 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 532 printf(", writes: sync %ld async %ld", 533 sfp->f_syncwrites, sfp->f_asyncwrites); 534 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 535 printf(", reads: sync %ld async %ld", 536 sfp->f_syncreads, sfp->f_asyncreads); 537 } 538 printf(")\n"); 539 } 540 541 static struct statfs * 542 getmntpt(const char *name) 543 { 544 struct statfs *mntbuf; 545 int i, mntsize; 546 547 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 548 for (i = mntsize - 1; i >= 0; i--) { 549 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 550 strcmp(mntbuf[i].f_mntonname, name) == 0) 551 return (&mntbuf[i]); 552 } 553 return (NULL); 554 } 555 556 static char * 557 catopt(char *s0, const char *s1) 558 { 559 size_t i; 560 char *cp; 561 562 if (s1 == NULL || *s1 == '\0') 563 return s0; 564 565 if (s0 && *s0) { 566 i = strlen(s0) + strlen(s1) + 1 + 1; 567 if ((cp = malloc(i)) == NULL) 568 errx(1, "malloc failed"); 569 snprintf(cp, i, "%s,%s", s0, s1); 570 } else 571 cp = xstrdup(s1); 572 573 if (s0) 574 free(s0); 575 return (cp); 576 } 577 578 static void 579 mangle(char *options, int *argcp, const char **argv) 580 { 581 char *p, *s; 582 int argc; 583 584 argc = *argcp; 585 for (s = options; (p = strsep(&s, ",")) != NULL;) 586 if (*p != '\0') { 587 if (*p == '-') { 588 argv[argc++] = p; 589 p = strchr(p, '='); 590 if (p) { 591 *p = '\0'; 592 argv[argc++] = p+1; 593 } 594 } else if (strcmp(p, "rw") != 0) { 595 argv[argc++] = "-o"; 596 argv[argc++] = p; 597 } 598 } 599 600 *argcp = argc; 601 } 602 603 604 static char * 605 update_options(char *opts, char *fstab, int curflags) 606 { 607 char *o, *p; 608 char *cur; 609 char *expopt, *newopt, *tmpopt; 610 611 if (opts == NULL) 612 return xstrdup(""); 613 614 /* remove meta options from list */ 615 remopt(fstab, MOUNT_META_OPTION_FSTAB); 616 remopt(fstab, MOUNT_META_OPTION_CURRENT); 617 cur = flags2opts(curflags); 618 619 /* 620 * Expand all meta-options passed to us first. 621 */ 622 expopt = NULL; 623 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 624 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 625 expopt = catopt(expopt, fstab); 626 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 627 expopt = catopt(expopt, cur); 628 else 629 expopt = catopt(expopt, o); 630 } 631 free(cur); 632 free(opts); 633 634 /* 635 * Remove previous contradictory arguments. Given option "foo" we 636 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 637 * and "foo" - so we can deal with possible options like "notice". 638 */ 639 newopt = NULL; 640 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 641 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 642 errx(1, "malloc failed"); 643 644 strcpy(tmpopt, "no"); 645 strcat(tmpopt, o); 646 remopt(newopt, tmpopt); 647 free(tmpopt); 648 649 if (strncmp("no", o, 2) == 0) 650 remopt(newopt, o+2); 651 652 newopt = catopt(newopt, o); 653 } 654 free(expopt); 655 656 return newopt; 657 } 658 659 static void 660 remopt(char *string, const char *opt) 661 { 662 char *o, *p, *r; 663 664 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 665 return; 666 667 r = string; 668 669 for (p = string; (o = strsep(&p, ",")) != NULL;) { 670 if (strcmp(opt, o) != 0) { 671 if (*r == ',' && *o != '\0') 672 r++; 673 while ((*r++ = *o++) != '\0') 674 ; 675 *--r = ','; 676 } 677 } 678 *r = '\0'; 679 } 680 681 static void 682 usage(void) 683 { 684 685 fprintf(stderr, "%s\n%s\n%s\n", 686 "usage: mount [-adfpruvw] [-F fstab] [-o options] [-t type]", 687 " mount [-dfpruvw] {special | node}", 688 " mount [-dfpruvw] [-o options] [-t type] special node"); 689 exit(1); 690 } 691 692 /* 693 * Prints the default values for dump frequency and pass number of fsck. 694 * This happens when mount(8) is called with -p and there is no fstab file 695 * or there is but the values aren't specified. 696 */ 697 static void 698 printdefvals(const struct statfs *ent) 699 { 700 if (strcmp(ent->f_fstypename, "ufs") == 0) { 701 if (strcmp(ent->f_mntonname, "/") == 0) 702 printf("\t1 1\n"); 703 else 704 printf("\t2 2\n"); 705 } else { 706 printf("\t0 0\n"); 707 } 708 } 709 710 static void 711 putfsent(const struct statfs *ent) 712 { 713 struct stat sb; 714 struct fstab *fst; 715 char *opts; 716 717 opts = flags2opts(ent->f_flags); 718 printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname, 719 ent->f_fstypename, opts); 720 free(opts); 721 722 /* 723 * If fstab file is missing don't call getfsspec() or getfsfile() 724 * at all, because the same warning will be printed twice for every 725 * mounted filesystem. 726 */ 727 if (stat(_PATH_FSTAB, &sb) != -1) { 728 if ((fst = getfsspec(ent->f_mntfromname))) 729 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 730 else if ((fst = getfsfile(ent->f_mntonname))) 731 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 732 else 733 printdefvals(ent); 734 } else { 735 printdefvals(ent); 736 } 737 } 738 739 740 static char * 741 flags2opts(int flags) 742 { 743 char *res; 744 745 res = NULL; 746 747 res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw"); 748 749 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 750 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 751 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 752 if (flags & MNT_NODEV) res = catopt(res, "nodev"); 753 if (flags & MNT_ASYNC) res = catopt(res, "async"); 754 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 755 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 756 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 757 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 758 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 759 if (flags & MNT_IGNORE) res = catopt(res, "ignore"); 760 761 return res; 762 } 763 764 static char* 765 xstrdup(const char *str) 766 { 767 char* ret = strdup(str); 768 if(ret == NULL) { 769 errx(1, "strdup failed (could not allocate memory)"); 770 } 771 return ret; 772 } 773 774 /* 775 * Hack 'cd9660' for the default fstype on cd media if no disklabel 776 * found. 777 */ 778 static int 779 iscdmedia(const char *path, int fd __unused) 780 { 781 int n; 782 783 if (strrchr(path, '/')) 784 path = strrchr(path, '/') + 1; 785 if (sscanf(path, "acd%d", &n) == 1) 786 return 1; 787 if (sscanf(path, "cd%d", &n) == 1) 788 return 1; 789 return 0; 790 } 791 792 /* 793 * If the device path is a cdev attempt to access the disklabel to determine 794 * the filesystem type. Adjust *vfstypep if we can figure it out 795 * definitively. 796 * 797 * Ignore any portion of the device path after an '@' or ':'. 798 */ 799 static void 800 checkdisklabel(const char *devpath, const char **vfstypep) 801 { 802 struct stat st; 803 struct partinfo info; 804 char *path = strdup(devpath); 805 int fd; 806 807 if (strchr(path, '@')) 808 *strchr(path, '@') = 0; 809 if (strchr(path, ':')) 810 *strchr(path, ':') = 0; 811 812 if (stat(path, &st) < 0) 813 goto done; 814 if (!S_ISCHR(st.st_mode)) 815 goto done; 816 fd = open(path, O_RDONLY); 817 if (fd < 0) 818 goto done; 819 if (ioctl(fd, DIOCGPART, &info) == 0) { 820 if (info.fstype >= 0 && info.fstype < (int)FSMAXTYPES) { 821 if (fstype_to_vfsname[info.fstype]) { 822 *vfstypep = fstype_to_vfsname[info.fstype]; 823 } else if (iscdmedia(path, fd)) { 824 *vfstypep = "cd9660"; 825 } else { 826 fprintf(stderr, 827 "mount: warning: fstype in disklabel " 828 "not set to anything I understand\n"); 829 fprintf(stderr, 830 "attempting to mount with -t ufs\n"); 831 } 832 } 833 } 834 close(fd); 835 done: 836 free(path); 837 } 838