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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1980, 1989, 1993, 1994 The Regents of the University of California. All rights reserved. 34 * @(#)mount.c 8.25 (Berkeley) 5/8/95 35 * $FreeBSD: src/sbin/mount/mount.c,v 1.39.2.3 2001/08/01 08:26:23 obrien Exp $ 36 * $DragonFly: src/sbin/mount/mount.c,v 1.10 2005/04/03 17:13:08 joerg Exp $ 37 */ 38 39 #include <sys/param.h> 40 #include <sys/mount.h> 41 #include <sys/stat.h> 42 #include <sys/wait.h> 43 44 #include <err.h> 45 #include <errno.h> 46 #include <fstab.h> 47 #include <pwd.h> 48 #include <signal.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <unistd.h> 53 54 #include "extern.h" 55 #include "mntopts.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 82 /* Map from mount options to printable formats. */ 83 static struct opt { 84 int o_opt; 85 const char *o_name; 86 } optnames[] = { 87 { MNT_ASYNC, "asynchronous" }, 88 { MNT_EXPORTED, "NFS exported" }, 89 { MNT_LOCAL, "local" }, 90 { MNT_NOATIME, "noatime" }, 91 { MNT_NODEV, "nodev" }, 92 { MNT_NOEXEC, "noexec" }, 93 { MNT_NOSUID, "nosuid" }, 94 { MNT_NOSYMFOLLOW, "nosymfollow" }, 95 { MNT_QUOTA, "with quotas" }, 96 { MNT_RDONLY, "read-only" }, 97 { MNT_SYNCHRONOUS, "synchronous" }, 98 { MNT_UNION, "union" }, 99 { MNT_NOCLUSTERR, "noclusterr" }, 100 { MNT_NOCLUSTERW, "noclusterw" }, 101 { MNT_SUIDDIR, "suiddir" }, 102 { MNT_SOFTDEP, "soft-updates" }, 103 { 0, NULL } 104 }; 105 106 /* 107 * List of VFS types that can be remounted without becoming mounted on top 108 * of each other. 109 * XXX Is this list correct? 110 */ 111 static const char * 112 remountable_fs_names[] = { 113 "ufs", "ffs", "ext2fs", 114 0 115 }; 116 117 int 118 main(int argc, char **argv) 119 { 120 const char *mntfromname, **vfslist, *vfstype; 121 struct fstab *fs; 122 struct statfs *mntbuf; 123 FILE *mountdfp; 124 pid_t pid; 125 int all, ch, i, init_flags, mntsize, rval, have_fstab; 126 char *options; 127 128 all = init_flags = 0; 129 options = NULL; 130 vfslist = NULL; 131 vfstype = "ufs"; 132 while ((ch = getopt(argc, argv, "adfo:prwt:uv")) != -1) 133 switch (ch) { 134 case 'a': 135 all = 1; 136 break; 137 case 'd': 138 debug = 1; 139 break; 140 case 'f': 141 init_flags |= MNT_FORCE; 142 break; 143 case 'o': 144 if (*optarg) 145 options = catopt(options, optarg); 146 break; 147 case 'p': 148 fstab_style = 1; 149 verbose = 1; 150 break; 151 case 'r': 152 options = catopt(options, "ro"); 153 break; 154 case 't': 155 if (vfslist != NULL) 156 errx(1, "only one -t option may be specified"); 157 vfslist = makevfslist(optarg); 158 vfstype = optarg; 159 break; 160 case 'u': 161 init_flags |= MNT_UPDATE; 162 break; 163 case 'v': 164 verbose = 1; 165 break; 166 case 'w': 167 options = catopt(options, "noro"); 168 break; 169 case '?': 170 default: 171 usage(); 172 /* NOTREACHED */ 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, spec contains either a ':' or a '@', and the 277 * spec is not a file with those characters, then assume 278 * that an NFS filesystem is being specified ala Sun. 279 */ 280 if (vfslist == NULL && strpbrk(argv[0], ":@") != NULL && 281 access(argv[0], 0) == -1) 282 vfstype = "nfs"; 283 rval = mountfs(vfstype, 284 argv[0], argv[1], init_flags, options, NULL); 285 break; 286 default: 287 usage(); 288 /* NOTREACHED */ 289 } 290 291 /* 292 * If the mount was successfully, and done by root, tell mountd the 293 * good news. Pid checks are probably unnecessary, but don't hurt. 294 */ 295 if (rval == 0 && getuid() == 0 && 296 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 297 if (fscanf(mountdfp, "%d", &pid) == 1 && 298 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) 299 err(1, "signal mountd"); 300 fclose(mountdfp); 301 } 302 303 exit(rval); 304 } 305 306 static int 307 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 308 { 309 int i; 310 311 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 312 /* the root file system can always be remounted */ 313 return (0); 314 315 for (i = mntsize - 1; i >= 0; --i) 316 if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 && 317 (!isremountable(fs->fs_vfstype) || 318 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 319 return (1); 320 return (0); 321 } 322 323 static int 324 isremountable(const char *vfsname) 325 { 326 const char **cp; 327 328 for (cp = remountable_fs_names; *cp; cp++) 329 if (strcmp(*cp, vfsname) == 0) 330 return (1); 331 return (0); 332 } 333 334 static int 335 hasopt(const char *mntopts, const char *option) 336 { 337 int negative, found; 338 char *opt, *optbuf; 339 340 if (option[0] == 'n' && option[1] == 'o') { 341 negative = 1; 342 option += 2; 343 } else 344 negative = 0; 345 optbuf = xstrdup(mntopts); 346 found = 0; 347 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 348 if (opt[0] == 'n' && opt[1] == 'o') { 349 if (!strcasecmp(opt + 2, option)) 350 found = negative; 351 } else if (!strcasecmp(opt, option)) 352 found = !negative; 353 } 354 free(optbuf); 355 return (found); 356 } 357 358 static int 359 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 360 const char *options, const char *mntopts) 361 { 362 /* List of directories containing mount_xxx subcommands. */ 363 static const char *edirs[] = { 364 _PATH_SBIN, 365 _PATH_USRSBIN, 366 NULL 367 }; 368 const char *argv[100], **edir; 369 struct statfs sf; 370 pid_t pid; 371 int argc, i, status; 372 char *optbuf, execname[MAXPATHLEN + 1], mntpath[MAXPATHLEN]; 373 374 #if __GNUC__ 375 (void)&optbuf; 376 (void)&name; 377 #endif 378 379 /* resolve the mountpoint with realpath(3) */ 380 checkpath(name, mntpath); 381 name = mntpath; 382 383 if (mntopts == NULL) 384 mntopts = ""; 385 if (options == NULL) { 386 if (*mntopts == '\0') { 387 options = "rw"; 388 } else { 389 options = mntopts; 390 mntopts = ""; 391 } 392 } 393 optbuf = catopt(xstrdup(mntopts), options); 394 395 if (strcmp(name, "/") == 0) 396 flags |= MNT_UPDATE; 397 if (flags & MNT_FORCE) 398 optbuf = catopt(optbuf, "force"); 399 if (flags & MNT_RDONLY) 400 optbuf = catopt(optbuf, "ro"); 401 /* 402 * XXX 403 * The mount_mfs (newfs) command uses -o to select the 404 * optimization mode. We don't pass the default "-o rw" 405 * for that reason. 406 */ 407 if (flags & MNT_UPDATE) 408 optbuf = catopt(optbuf, "update"); 409 410 argc = 0; 411 argv[argc++] = vfstype; 412 mangle(optbuf, &argc, argv); 413 argv[argc++] = spec; 414 argv[argc++] = name; 415 argv[argc] = NULL; 416 417 if (debug) { 418 printf("exec: mount_%s", vfstype); 419 for (i = 1; i < argc; i++) 420 printf(" %s", argv[i]); 421 printf("\n"); 422 return (0); 423 } 424 425 switch (pid = fork()) { 426 case -1: /* Error. */ 427 warn("fork"); 428 free(optbuf); 429 return (1); 430 case 0: /* Child. */ 431 if (strcmp(vfstype, "ufs") == 0) 432 exit(mount_ufs(argc, argv)); 433 434 /* Go find an executable. */ 435 for (edir = edirs; *edir; edir++) { 436 snprintf(execname, 437 sizeof(execname), "%s/mount_%s", *edir, vfstype); 438 execv(execname, __DECONST(char * const *, argv)); 439 } 440 if (errno == ENOENT) { 441 int len = 0; 442 char *cp; 443 for (edir = edirs; *edir; edir++) 444 len += strlen(*edir) + 2; /* ", " */ 445 if ((cp = malloc(len)) == NULL) 446 errx(1, "malloc failed"); 447 cp[0] = '\0'; 448 for (edir = edirs; *edir; edir++) { 449 strcat(cp, *edir); 450 if (edir[1] != NULL) 451 strcat(cp, ", "); 452 } 453 warn("exec mount_%s not found in %s", vfstype, cp); 454 } 455 exit(1); 456 /* NOTREACHED */ 457 default: /* Parent. */ 458 free(optbuf); 459 460 if (waitpid(pid, &status, 0) < 0) { 461 warn("waitpid"); 462 return (1); 463 } 464 465 if (WIFEXITED(status)) { 466 if (WEXITSTATUS(status) != 0) 467 return (WEXITSTATUS(status)); 468 } else if (WIFSIGNALED(status)) { 469 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 470 return (1); 471 } 472 473 if (verbose) { 474 if (statfs(name, &sf) < 0) { 475 warn("statfs %s", name); 476 return (1); 477 } 478 if (fstab_style) 479 putfsent(&sf); 480 else 481 prmount(&sf); 482 } 483 break; 484 } 485 486 return (0); 487 } 488 489 static void 490 prmount(struct statfs *sfp) 491 { 492 int flags; 493 struct opt *o; 494 struct passwd *pw; 495 496 printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 497 sfp->f_fstypename); 498 499 flags = sfp->f_flags & MNT_VISFLAGMASK; 500 for (o = optnames; flags && o->o_opt; o++) 501 if (flags & o->o_opt) { 502 printf(", %s", o->o_name); 503 flags &= ~o->o_opt; 504 } 505 if (sfp->f_owner) { 506 printf(", mounted by "); 507 if ((pw = getpwuid(sfp->f_owner)) != NULL) 508 printf("%s", pw->pw_name); 509 else 510 printf("%d", sfp->f_owner); 511 } 512 if (verbose) { 513 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 514 printf(", writes: sync %ld async %ld", 515 sfp->f_syncwrites, sfp->f_asyncwrites); 516 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 517 printf(", reads: sync %ld async %ld", 518 sfp->f_syncreads, sfp->f_asyncreads); 519 } 520 printf(")\n"); 521 } 522 523 static struct statfs * 524 getmntpt(const char *name) 525 { 526 struct statfs *mntbuf; 527 int i, mntsize; 528 529 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 530 for (i = mntsize - 1; i >= 0; i--) { 531 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 532 strcmp(mntbuf[i].f_mntonname, name) == 0) 533 return (&mntbuf[i]); 534 } 535 return (NULL); 536 } 537 538 static char * 539 catopt(char *s0, const char *s1) 540 { 541 size_t i; 542 char *cp; 543 544 if (s1 == NULL || *s1 == '\0') 545 return s0; 546 547 if (s0 && *s0) { 548 i = strlen(s0) + strlen(s1) + 1 + 1; 549 if ((cp = malloc(i)) == NULL) 550 errx(1, "malloc failed"); 551 snprintf(cp, i, "%s,%s", s0, s1); 552 } else 553 cp = xstrdup(s1); 554 555 if (s0) 556 free(s0); 557 return (cp); 558 } 559 560 static void 561 mangle(char *options, int *argcp, const char **argv) 562 { 563 char *p, *s; 564 int argc; 565 566 argc = *argcp; 567 for (s = options; (p = strsep(&s, ",")) != NULL;) 568 if (*p != '\0') { 569 if (*p == '-') { 570 argv[argc++] = p; 571 p = strchr(p, '='); 572 if (p) { 573 *p = '\0'; 574 argv[argc++] = p+1; 575 } 576 } else if (strcmp(p, "rw") != 0) { 577 argv[argc++] = "-o"; 578 argv[argc++] = p; 579 } 580 } 581 582 *argcp = argc; 583 } 584 585 586 static char * 587 update_options(char *opts, char *fstab, int curflags) 588 { 589 char *o, *p; 590 char *cur; 591 char *expopt, *newopt, *tmpopt; 592 593 if (opts == NULL) 594 return xstrdup(""); 595 596 /* remove meta options from list */ 597 remopt(fstab, MOUNT_META_OPTION_FSTAB); 598 remopt(fstab, MOUNT_META_OPTION_CURRENT); 599 cur = flags2opts(curflags); 600 601 /* 602 * Expand all meta-options passed to us first. 603 */ 604 expopt = NULL; 605 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 606 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 607 expopt = catopt(expopt, fstab); 608 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 609 expopt = catopt(expopt, cur); 610 else 611 expopt = catopt(expopt, o); 612 } 613 free(cur); 614 free(opts); 615 616 /* 617 * Remove previous contradictory arguments. Given option "foo" we 618 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 619 * and "foo" - so we can deal with possible options like "notice". 620 */ 621 newopt = NULL; 622 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 623 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 624 errx(1, "malloc failed"); 625 626 strcpy(tmpopt, "no"); 627 strcat(tmpopt, o); 628 remopt(newopt, tmpopt); 629 free(tmpopt); 630 631 if (strncmp("no", o, 2) == 0) 632 remopt(newopt, o+2); 633 634 newopt = catopt(newopt, o); 635 } 636 free(expopt); 637 638 return newopt; 639 } 640 641 static void 642 remopt(char *string, const char *opt) 643 { 644 char *o, *p, *r; 645 646 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 647 return; 648 649 r = string; 650 651 for (p = string; (o = strsep(&p, ",")) != NULL;) { 652 if (strcmp(opt, o) != 0) { 653 if (*r == ',' && *o != '\0') 654 r++; 655 while ((*r++ = *o++) != '\0') 656 ; 657 *--r = ','; 658 } 659 } 660 *r = '\0'; 661 } 662 663 static void 664 usage(void) 665 { 666 667 fprintf(stderr, "%s\n%s\n%s\n", 668 "usage: mount [-dfpruvw] [-o options] [-t ufs | external_type] special node", 669 " mount [-adfpruvw] [-o options] [-t ufs | external_type]", 670 " mount [-dfpruvw] special | node"); 671 exit(1); 672 } 673 674 /* 675 * Prints the default values for dump frequency and pass number of fsck. 676 * This happens when mount(8) is called with -p and there is no fstab file 677 * or there is but the values aren't specified. 678 */ 679 static void 680 printdefvals(const struct statfs *ent) 681 { 682 if (strcmp(ent->f_fstypename, "ufs") == 0) { 683 if (strcmp(ent->f_mntonname, "/") == 0) 684 printf("\t1 1\n"); 685 else 686 printf("\t2 2\n"); 687 } else { 688 printf("\t0 0\n"); 689 } 690 } 691 692 static void 693 putfsent(const struct statfs *ent) 694 { 695 struct stat sb; 696 struct fstab *fst; 697 char *opts; 698 699 opts = flags2opts(ent->f_flags); 700 printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname, 701 ent->f_fstypename, opts); 702 free(opts); 703 704 /* 705 * If fstab file is missing don't call getfsspec() or getfsfile() 706 * at all, because the same warning will be printed twice for every 707 * mounted filesystem. 708 */ 709 if (stat(_PATH_FSTAB, &sb) != -1) { 710 if ((fst = getfsspec(ent->f_mntfromname))) 711 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 712 else if ((fst = getfsfile(ent->f_mntonname))) 713 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 714 else 715 printdefvals(ent); 716 } else { 717 printdefvals(ent); 718 } 719 } 720 721 722 static char * 723 flags2opts(int flags) 724 { 725 char *res; 726 727 res = NULL; 728 729 res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw"); 730 731 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 732 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 733 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 734 if (flags & MNT_NODEV) res = catopt(res, "nodev"); 735 if (flags & MNT_UNION) res = catopt(res, "union"); 736 if (flags & MNT_ASYNC) res = catopt(res, "async"); 737 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 738 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 739 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 740 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 741 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 742 743 return res; 744 } 745 746 static char* 747 xstrdup(const char *str) 748 { 749 char* ret = strdup(str); 750 if(ret == NULL) { 751 errx(1, "strdup failed (could not allocate memory)"); 752 } 753 return ret; 754 } 755