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 34 #ifndef lint 35 static const char copyright[] = 36 "@(#) Copyright (c) 1980, 1989, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 #if 0 42 static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95"; 43 #endif 44 static const char rcsid[] = 45 "$FreeBSD$"; 46 #endif /* not lint */ 47 48 #include <sys/param.h> 49 #include <sys/mount.h> 50 #include <sys/stat.h> 51 #include <sys/wait.h> 52 53 #include <ctype.h> 54 #include <err.h> 55 #include <errno.h> 56 #include <fstab.h> 57 #include <paths.h> 58 #include <pwd.h> 59 #include <signal.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 #include "extern.h" 66 #include "mntopts.h" 67 #include "pathnames.h" 68 69 /* `meta' options */ 70 #define MOUNT_META_OPTION_FSTAB "fstab" 71 #define MOUNT_META_OPTION_CURRENT "current" 72 73 int debug, fstab_style, verbose; 74 75 char *catopt(char *, const char *); 76 struct statfs *getmntpt(const char *); 77 int hasopt(const char *, const char *); 78 int ismounted(struct fstab *, struct statfs *, int); 79 int isremountable(const char *); 80 void mangle(char *, int *, const char **); 81 char *update_options(char *, char *, int); 82 int mountfs(const char *, const char *, const char *, 83 int, const char *, const char *); 84 void remopt(char *, const char *); 85 void prmount(struct statfs *); 86 void putfsent(const struct statfs *); 87 void usage(void); 88 char *flags2opts(int); 89 90 /* Map from mount options to printable formats. */ 91 static struct opt { 92 int o_opt; 93 const char *o_name; 94 } optnames[] = { 95 { MNT_ASYNC, "asynchronous" }, 96 { MNT_EXPORTED, "NFS exported" }, 97 { MNT_LOCAL, "local" }, 98 { MNT_NOATIME, "noatime" }, 99 { MNT_NODEV, "nodev" }, 100 { MNT_NOEXEC, "noexec" }, 101 { MNT_NOSUID, "nosuid" }, 102 { MNT_NOSYMFOLLOW, "nosymfollow" }, 103 { MNT_QUOTA, "with quotas" }, 104 { MNT_RDONLY, "read-only" }, 105 { MNT_SYNCHRONOUS, "synchronous" }, 106 { MNT_UNION, "union" }, 107 { MNT_NOCLUSTERR, "noclusterr" }, 108 { MNT_NOCLUSTERW, "noclusterw" }, 109 { MNT_SUIDDIR, "suiddir" }, 110 { MNT_SOFTDEP, "soft-updates" }, 111 { MNT_MULTILABEL, "multilabel" }, 112 { MNT_ACLS, "acls" }, 113 { 0, NULL } 114 }; 115 116 /* 117 * List of VFS types that can be remounted without becoming mounted on top 118 * of each other. 119 * XXX Is this list correct? 120 */ 121 static const char * 122 remountable_fs_names[] = { 123 "ufs", "ffs", "ext2fs", 124 0 125 }; 126 127 int 128 main(argc, argv) 129 int argc; 130 char * const argv[]; 131 { 132 const char *mntfromname, **vfslist, *vfstype; 133 struct fstab *fs; 134 struct statfs *mntbuf; 135 FILE *mountdfp; 136 pid_t pid; 137 int all, ch, i, init_flags, mntsize, rval, have_fstab; 138 char *cp, *ep, *options; 139 140 all = init_flags = 0; 141 options = NULL; 142 vfslist = NULL; 143 vfstype = "ufs"; 144 while ((ch = getopt(argc, argv, "adF:fo:prwt:uv")) != -1) 145 switch (ch) { 146 case 'a': 147 all = 1; 148 break; 149 case 'd': 150 debug = 1; 151 break; 152 case 'F': 153 setfstab(optarg); 154 break; 155 case 'f': 156 init_flags |= MNT_FORCE; 157 break; 158 case 'o': 159 if (*optarg) 160 options = catopt(options, optarg); 161 break; 162 case 'p': 163 fstab_style = 1; 164 verbose = 1; 165 break; 166 case 'r': 167 options = catopt(options, "ro"); 168 break; 169 case 't': 170 if (vfslist != NULL) 171 errx(1, "only one -t option may be specified"); 172 vfslist = makevfslist(optarg); 173 vfstype = optarg; 174 break; 175 case 'u': 176 init_flags |= MNT_UPDATE; 177 break; 178 case 'v': 179 verbose = 1; 180 break; 181 case 'w': 182 options = catopt(options, "noro"); 183 break; 184 case '?': 185 default: 186 usage(); 187 /* NOTREACHED */ 188 } 189 argc -= optind; 190 argv += optind; 191 192 #define BADTYPE(type) \ 193 (strcmp(type, FSTAB_RO) && \ 194 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 195 196 rval = 0; 197 switch (argc) { 198 case 0: 199 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 200 err(1, "getmntinfo"); 201 if (all) { 202 while ((fs = getfsent()) != NULL) { 203 if (BADTYPE(fs->fs_type)) 204 continue; 205 if (checkvfsname(fs->fs_vfstype, vfslist)) 206 continue; 207 if (hasopt(fs->fs_mntops, "noauto")) 208 continue; 209 if (!(init_flags & MNT_UPDATE) && 210 ismounted(fs, mntbuf, mntsize)) 211 continue; 212 if (mountfs(fs->fs_vfstype, fs->fs_spec, 213 fs->fs_file, init_flags, options, 214 fs->fs_mntops)) 215 rval = 1; 216 } 217 } else if (fstab_style) { 218 for (i = 0; i < mntsize; i++) { 219 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 220 continue; 221 putfsent(&mntbuf[i]); 222 } 223 } else { 224 for (i = 0; i < mntsize; i++) { 225 if (checkvfsname(mntbuf[i].f_fstypename, 226 vfslist)) 227 continue; 228 prmount(&mntbuf[i]); 229 } 230 } 231 exit(rval); 232 case 1: 233 if (vfslist != NULL) 234 usage(); 235 236 if (init_flags & MNT_UPDATE) { 237 mntfromname = NULL; 238 have_fstab = 0; 239 if ((mntbuf = getmntpt(*argv)) == NULL) 240 errx(1, "not currently mounted %s", *argv); 241 /* 242 * Only get the mntflags from fstab if both mntpoint 243 * and mntspec are identical. Also handle the special 244 * case where just '/' is mounted and 'spec' is not 245 * identical with the one from fstab ('/dev' is missing 246 * in the spec-string at boot-time). 247 */ 248 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 249 if (strcmp(fs->fs_spec, 250 mntbuf->f_mntfromname) == 0 && 251 strcmp(fs->fs_file, 252 mntbuf->f_mntonname) == 0) { 253 have_fstab = 1; 254 mntfromname = mntbuf->f_mntfromname; 255 } else if (argv[0][0] == '/' && 256 argv[0][1] == '\0') { 257 fs = getfsfile("/"); 258 have_fstab = 1; 259 mntfromname = fs->fs_spec; 260 } 261 } 262 if (have_fstab) { 263 options = update_options(options, fs->fs_mntops, 264 mntbuf->f_flags); 265 } else { 266 mntfromname = mntbuf->f_mntfromname; 267 options = update_options(options, NULL, 268 mntbuf->f_flags); 269 } 270 rval = mountfs(mntbuf->f_fstypename, mntfromname, 271 mntbuf->f_mntonname, init_flags, options, 0); 272 break; 273 } 274 rmslashes(*argv, *argv); 275 if ((fs = getfsfile(*argv)) == NULL && 276 (fs = getfsspec(*argv)) == NULL) 277 errx(1, "%s: unknown special file or file system", 278 *argv); 279 if (BADTYPE(fs->fs_type)) 280 errx(1, "%s has unknown file system type", 281 *argv); 282 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 283 init_flags, options, fs->fs_mntops); 284 break; 285 case 2: 286 /* 287 * If -t flag has not been specified, the path cannot be 288 * found, spec contains either a ':' or a '@', then assume 289 * that an NFS file system is being specified ala Sun. 290 * Check if the hostname contains only allowed characters 291 * to reduce false positives. IPv6 addresses containing 292 * ':' will be correctly parsed only if the separator is '@'. 293 * The definition of a valid hostname is taken from RFC 1034. 294 */ 295 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL) || 296 ((ep = strchr(argv[0], ':')) != NULL)) { 297 if (*ep == '@') { 298 cp = ep + 1; 299 ep = cp + strlen(cp); 300 } else 301 cp = argv[0]; 302 while (cp != ep) { 303 if (!isdigit(*cp) && !isalpha(*cp) && 304 *cp != '.' && *cp != '-' && *cp != ':') 305 break; 306 cp++; 307 } 308 if (cp == ep) 309 vfstype = "nfs"; 310 } 311 rval = mountfs(vfstype, 312 argv[0], argv[1], init_flags, options, NULL); 313 break; 314 default: 315 usage(); 316 /* NOTREACHED */ 317 } 318 319 /* 320 * If the mount was successfully, and done by root, tell mountd the 321 * good news. Pid checks are probably unnecessary, but don't hurt. 322 */ 323 if (rval == 0 && getuid() == 0 && 324 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 325 if (fscanf(mountdfp, "%d", &pid) == 1 && 326 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) 327 err(1, "signal mountd"); 328 (void)fclose(mountdfp); 329 } 330 331 exit(rval); 332 } 333 334 int 335 ismounted(fs, mntbuf, mntsize) 336 struct fstab *fs; 337 struct statfs *mntbuf; 338 int mntsize; 339 { 340 int i; 341 342 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 343 /* the root file system can always be remounted */ 344 return (0); 345 346 for (i = mntsize - 1; i >= 0; --i) 347 if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 && 348 (!isremountable(fs->fs_vfstype) || 349 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 350 return (1); 351 return (0); 352 } 353 354 int 355 isremountable(vfsname) 356 const char *vfsname; 357 { 358 const char **cp; 359 360 for (cp = remountable_fs_names; *cp; cp++) 361 if (strcmp(*cp, vfsname) == 0) 362 return (1); 363 return (0); 364 } 365 366 int 367 hasopt(mntopts, option) 368 const char *mntopts, *option; 369 { 370 int negative, found; 371 char *opt, *optbuf; 372 373 if (option[0] == 'n' && option[1] == 'o') { 374 negative = 1; 375 option += 2; 376 } else 377 negative = 0; 378 optbuf = strdup(mntopts); 379 found = 0; 380 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 381 if (opt[0] == 'n' && opt[1] == 'o') { 382 if (!strcasecmp(opt + 2, option)) 383 found = negative; 384 } else if (!strcasecmp(opt, option)) 385 found = !negative; 386 } 387 free(optbuf); 388 return (found); 389 } 390 391 int 392 mountfs(vfstype, spec, name, flags, options, mntopts) 393 const char *vfstype, *spec, *name, *options, *mntopts; 394 int flags; 395 { 396 const char *argv[100], **edir; 397 char *path, *cur; 398 struct statfs sf; 399 pid_t pid; 400 int argc, i, status; 401 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 402 403 #if __GNUC__ 404 (void)&optbuf; 405 (void)&name; 406 #endif 407 408 /* resolve the mountpoint with realpath(3) */ 409 (void)checkpath(name, mntpath); 410 name = mntpath; 411 412 if (mntopts == NULL) 413 mntopts = ""; 414 if (options == NULL) { 415 if (*mntopts == '\0') { 416 options = "rw"; 417 } else { 418 options = mntopts; 419 mntopts = ""; 420 } 421 } 422 optbuf = catopt(strdup(mntopts), options); 423 424 if (strcmp(name, "/") == 0) 425 flags |= MNT_UPDATE; 426 if (flags & MNT_FORCE) 427 optbuf = catopt(optbuf, "force"); 428 if (flags & MNT_RDONLY) 429 optbuf = catopt(optbuf, "ro"); 430 /* 431 * XXX 432 * The mount_mfs (newfs) command uses -o to select the 433 * optimization mode. We don't pass the default "-o rw" 434 * for that reason. 435 */ 436 if (flags & MNT_UPDATE) 437 optbuf = catopt(optbuf, "update"); 438 439 /* Compatibility glue. */ 440 if (strcmp(vfstype, "msdos") == 0) 441 vfstype = "msdosfs"; 442 443 argc = 0; 444 argv[argc++] = vfstype; 445 mangle(optbuf, &argc, argv); 446 argv[argc++] = spec; 447 argv[argc++] = name; 448 argv[argc] = NULL; 449 450 if (debug) { 451 (void)printf("exec: mount_%s", vfstype); 452 for (i = 1; i < argc; i++) 453 (void)printf(" %s", argv[i]); 454 (void)printf("\n"); 455 return (0); 456 } 457 458 switch (pid = fork()) { 459 case -1: /* Error. */ 460 warn("fork"); 461 free(optbuf); 462 return (1); 463 case 0: /* Child. */ 464 if (strcmp(vfstype, "ufs") == 0) 465 exit(mount_ufs(argc, (char * const *) argv)); 466 467 /* Go find an executable. */ 468 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 469 execvP(execname, _PATH_SYSPATH, (char * const *)argv); 470 if (errno == ENOENT) { 471 warn("exec mount_%s not found in %s", vfstype, path); 472 } 473 exit(1); 474 /* NOTREACHED */ 475 default: /* Parent. */ 476 free(optbuf); 477 478 if (waitpid(pid, &status, 0) < 0) { 479 warn("waitpid"); 480 return (1); 481 } 482 483 if (WIFEXITED(status)) { 484 if (WEXITSTATUS(status) != 0) 485 return (WEXITSTATUS(status)); 486 } else if (WIFSIGNALED(status)) { 487 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 488 return (1); 489 } 490 491 if (verbose) { 492 if (statfs(name, &sf) < 0) { 493 warn("statfs %s", name); 494 return (1); 495 } 496 if (fstab_style) 497 putfsent(&sf); 498 else 499 prmount(&sf); 500 } 501 break; 502 } 503 504 return (0); 505 } 506 507 void 508 prmount(sfp) 509 struct statfs *sfp; 510 { 511 int flags, i; 512 struct opt *o; 513 struct passwd *pw; 514 515 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 516 sfp->f_fstypename); 517 518 flags = sfp->f_flags & MNT_VISFLAGMASK; 519 for (o = optnames; flags && o->o_opt; o++) 520 if (flags & o->o_opt) { 521 (void)printf(", %s", o->o_name); 522 flags &= ~o->o_opt; 523 } 524 if (sfp->f_owner) { 525 (void)printf(", mounted by "); 526 if ((pw = getpwuid(sfp->f_owner)) != NULL) 527 (void)printf("%s", pw->pw_name); 528 else 529 (void)printf("%d", sfp->f_owner); 530 } 531 if (verbose) { 532 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 533 (void)printf(", writes: sync %ld async %ld", 534 sfp->f_syncwrites, sfp->f_asyncwrites); 535 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 536 (void)printf(", reads: sync %ld async %ld", 537 sfp->f_syncreads, sfp->f_asyncreads); 538 printf(", fsid "); 539 for (i = 0; i < sizeof(sfp->f_fsid); i++) 540 printf("%02x", ((u_char *)&sfp->f_fsid)[i]); 541 } 542 (void)printf(")\n"); 543 } 544 545 struct statfs * 546 getmntpt(name) 547 const char *name; 548 { 549 struct statfs *mntbuf; 550 int i, mntsize; 551 552 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 553 for (i = mntsize - 1; i >= 0; i--) { 554 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 555 strcmp(mntbuf[i].f_mntonname, name) == 0) 556 return (&mntbuf[i]); 557 } 558 return (NULL); 559 } 560 561 char * 562 catopt(s0, s1) 563 char *s0; 564 const char *s1; 565 { 566 size_t i; 567 char *cp; 568 569 if (s1 == NULL || *s1 == '\0') 570 return s0; 571 572 if (s0 && *s0) { 573 i = strlen(s0) + strlen(s1) + 1 + 1; 574 if ((cp = malloc(i)) == NULL) 575 errx(1, "malloc failed"); 576 (void)snprintf(cp, i, "%s,%s", s0, s1); 577 } else 578 cp = strdup(s1); 579 580 if (s0) 581 free(s0); 582 return (cp); 583 } 584 585 void 586 mangle(options, argcp, argv) 587 char *options; 588 int *argcp; 589 const char **argv; 590 { 591 char *p, *s; 592 int argc; 593 594 argc = *argcp; 595 for (s = options; (p = strsep(&s, ",")) != NULL;) 596 if (*p != '\0') { 597 if (*p == '-') { 598 argv[argc++] = p; 599 p = strchr(p, '='); 600 if (p) { 601 *p = '\0'; 602 argv[argc++] = p+1; 603 } 604 } else if (strcmp(p, "rw") != 0) { 605 argv[argc++] = "-o"; 606 argv[argc++] = p; 607 } 608 } 609 610 *argcp = argc; 611 } 612 613 614 char * 615 update_options(opts, fstab, curflags) 616 char *opts; 617 char *fstab; 618 int curflags; 619 { 620 char *o, *p; 621 char *cur; 622 char *expopt, *newopt, *tmpopt; 623 624 if (opts == NULL) 625 return strdup(""); 626 627 /* remove meta options from list */ 628 remopt(fstab, MOUNT_META_OPTION_FSTAB); 629 remopt(fstab, MOUNT_META_OPTION_CURRENT); 630 cur = flags2opts(curflags); 631 632 /* 633 * Expand all meta-options passed to us first. 634 */ 635 expopt = NULL; 636 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 637 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 638 expopt = catopt(expopt, fstab); 639 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 640 expopt = catopt(expopt, cur); 641 else 642 expopt = catopt(expopt, o); 643 } 644 free(cur); 645 free(opts); 646 647 /* 648 * Remove previous contradictory arguments. Given option "foo" we 649 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 650 * and "foo" - so we can deal with possible options like "notice". 651 */ 652 newopt = NULL; 653 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 654 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 655 errx(1, "malloc failed"); 656 657 strcpy(tmpopt, "no"); 658 strcat(tmpopt, o); 659 remopt(newopt, tmpopt); 660 free(tmpopt); 661 662 if (strncmp("no", o, 2) == 0) 663 remopt(newopt, o+2); 664 665 newopt = catopt(newopt, o); 666 } 667 free(expopt); 668 669 return newopt; 670 } 671 672 void 673 remopt(string, opt) 674 char *string; 675 const char *opt; 676 { 677 char *o, *p, *r; 678 679 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 680 return; 681 682 r = string; 683 684 for (p = string; (o = strsep(&p, ",")) != NULL;) { 685 if (strcmp(opt, o) != 0) { 686 if (*r == ',' && *o != '\0') 687 r++; 688 while ((*r++ = *o++) != '\0') 689 ; 690 *--r = ','; 691 } 692 } 693 *r = '\0'; 694 } 695 696 void 697 usage() 698 { 699 700 (void)fprintf(stderr, "%s\n%s\n%s\n", 701 "usage: mount [-dfpruvw] [-o options] [-t ufs | external_type] special node", 702 " mount [-adfpruvw] [ -F fstab] [-t ufs | external_type]", 703 " mount [-dfpruvw] special | node"); 704 exit(1); 705 } 706 707 void 708 putfsent(ent) 709 const struct statfs *ent; 710 { 711 struct fstab *fst; 712 char *opts; 713 714 opts = flags2opts(ent->f_flags); 715 printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname, 716 ent->f_fstypename, opts); 717 free(opts); 718 719 if ((fst = getfsspec(ent->f_mntfromname))) 720 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 721 else if ((fst = getfsfile(ent->f_mntonname))) 722 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 723 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 724 if (strcmp(ent->f_mntonname, "/") == 0) 725 printf("\t1 1\n"); 726 else 727 printf("\t2 2\n"); 728 } else 729 printf("\t0 0\n"); 730 } 731 732 733 char * 734 flags2opts(flags) 735 int flags; 736 { 737 char *res; 738 739 res = NULL; 740 741 res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw"); 742 743 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 744 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 745 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 746 if (flags & MNT_NODEV) res = catopt(res, "nodev"); 747 if (flags & MNT_UNION) res = catopt(res, "union"); 748 if (flags & MNT_ASYNC) res = catopt(res, "async"); 749 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 750 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 751 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 752 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 753 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 754 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 755 if (flags & MNT_ACLS) res = catopt(res, "acls"); 756 757 return res; 758 } 759