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 * 4. 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 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1980, 1989, 1993, 1994\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif /* not lint */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95"; 39 #endif 40 static const char rcsid[] = 41 "$FreeBSD$"; 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/mount.h> 46 #include <sys/stat.h> 47 #include <sys/wait.h> 48 49 #include <ctype.h> 50 #include <err.h> 51 #include <errno.h> 52 #include <fstab.h> 53 #include <paths.h> 54 #include <pwd.h> 55 #include <signal.h> 56 #include <stdint.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <unistd.h> 61 62 #include "extern.h" 63 #include "mntopts.h" 64 #include "pathnames.h" 65 66 /* `meta' options */ 67 #define MOUNT_META_OPTION_FSTAB "fstab" 68 #define MOUNT_META_OPTION_CURRENT "current" 69 70 int debug, fstab_style, verbose; 71 72 char *catopt(char *, const char *); 73 struct statfs *getmntpt(const char *); 74 int hasopt(const char *, const char *); 75 int ismounted(struct fstab *, struct statfs *, int); 76 int isremountable(const char *); 77 void mangle(char *, int *, const char **); 78 char *update_options(char *, char *, int); 79 int mountfs(const char *, const char *, const char *, 80 int, const char *, const char *); 81 void remopt(char *, const char *); 82 void prmount(struct statfs *); 83 void putfsent(const struct statfs *); 84 void usage(void); 85 char *flags2opts(int); 86 87 /* Map from mount options to printable formats. */ 88 static struct opt { 89 int o_opt; 90 const char *o_name; 91 } optnames[] = { 92 { MNT_ASYNC, "asynchronous" }, 93 { MNT_EXPORTED, "NFS exported" }, 94 { MNT_LOCAL, "local" }, 95 { MNT_NOATIME, "noatime" }, 96 { MNT_NOEXEC, "noexec" }, 97 { MNT_NOSUID, "nosuid" }, 98 { MNT_NOSYMFOLLOW, "nosymfollow" }, 99 { MNT_QUOTA, "with quotas" }, 100 { MNT_RDONLY, "read-only" }, 101 { MNT_SYNCHRONOUS, "synchronous" }, 102 { MNT_UNION, "union" }, 103 { MNT_NOCLUSTERR, "noclusterr" }, 104 { MNT_NOCLUSTERW, "noclusterw" }, 105 { MNT_SUIDDIR, "suiddir" }, 106 { MNT_SOFTDEP, "soft-updates" }, 107 { MNT_MULTILABEL, "multilabel" }, 108 { MNT_ACLS, "acls" }, 109 { 0, NULL } 110 }; 111 112 /* 113 * List of VFS types that can be remounted without becoming mounted on top 114 * of each other. 115 * XXX Is this list correct? 116 */ 117 static const char * 118 remountable_fs_names[] = { 119 "ufs", "ffs", "ext2fs", 120 0 121 }; 122 123 int 124 main(int argc, char *argv[]) 125 { 126 const char *mntfromname, **vfslist, *vfstype; 127 struct fstab *fs; 128 struct statfs *mntbuf; 129 FILE *mountdfp; 130 pid_t pid; 131 int all, ch, i, init_flags, mntsize, rval, have_fstab; 132 char *cp, *ep, *options; 133 134 all = init_flags = 0; 135 options = NULL; 136 vfslist = NULL; 137 vfstype = "ufs"; 138 while ((ch = getopt(argc, argv, "adF:fo:prwt:uv")) != -1) 139 switch (ch) { 140 case 'a': 141 all = 1; 142 break; 143 case 'd': 144 debug = 1; 145 break; 146 case 'F': 147 setfstab(optarg); 148 break; 149 case 'f': 150 init_flags |= MNT_FORCE; 151 break; 152 case 'o': 153 if (*optarg) 154 options = catopt(options, optarg); 155 break; 156 case 'p': 157 fstab_style = 1; 158 verbose = 1; 159 break; 160 case 'r': 161 options = catopt(options, "ro"); 162 break; 163 case 't': 164 if (vfslist != NULL) 165 errx(1, "only one -t option may be specified"); 166 vfslist = makevfslist(optarg); 167 vfstype = optarg; 168 break; 169 case 'u': 170 init_flags |= MNT_UPDATE; 171 break; 172 case 'v': 173 verbose = 1; 174 break; 175 case 'w': 176 options = catopt(options, "noro"); 177 break; 178 case '?': 179 default: 180 usage(); 181 /* NOTREACHED */ 182 } 183 argc -= optind; 184 argv += optind; 185 186 #define BADTYPE(type) \ 187 (strcmp(type, FSTAB_RO) && \ 188 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 189 190 rval = 0; 191 switch (argc) { 192 case 0: 193 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 194 err(1, "getmntinfo"); 195 if (all) { 196 while ((fs = getfsent()) != NULL) { 197 if (BADTYPE(fs->fs_type)) 198 continue; 199 if (checkvfsname(fs->fs_vfstype, vfslist)) 200 continue; 201 if (hasopt(fs->fs_mntops, "noauto")) 202 continue; 203 if (!(init_flags & MNT_UPDATE) && 204 ismounted(fs, mntbuf, mntsize)) 205 continue; 206 options = update_options(options, fs->fs_mntops, 207 mntbuf->f_flags); 208 if (mountfs(fs->fs_vfstype, fs->fs_spec, 209 fs->fs_file, init_flags, options, 210 fs->fs_mntops)) 211 rval = 1; 212 } 213 } else if (fstab_style) { 214 for (i = 0; i < mntsize; i++) { 215 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 216 continue; 217 putfsent(&mntbuf[i]); 218 } 219 } else { 220 for (i = 0; i < mntsize; i++) { 221 if (checkvfsname(mntbuf[i].f_fstypename, 222 vfslist)) 223 continue; 224 prmount(&mntbuf[i]); 225 } 226 } 227 exit(rval); 228 case 1: 229 if (vfslist != NULL) 230 usage(); 231 232 rmslashes(*argv, *argv); 233 if (init_flags & MNT_UPDATE) { 234 mntfromname = NULL; 235 have_fstab = 0; 236 if ((mntbuf = getmntpt(*argv)) == NULL) 237 errx(1, "not currently mounted %s", *argv); 238 /* 239 * Only get the mntflags from fstab if both mntpoint 240 * and mntspec are identical. Also handle the special 241 * case where just '/' is mounted and 'spec' is not 242 * identical with the one from fstab ('/dev' is missing 243 * in the spec-string at boot-time). 244 */ 245 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 246 if (strcmp(fs->fs_spec, 247 mntbuf->f_mntfromname) == 0 && 248 strcmp(fs->fs_file, 249 mntbuf->f_mntonname) == 0) { 250 have_fstab = 1; 251 mntfromname = mntbuf->f_mntfromname; 252 } else if (argv[0][0] == '/' && 253 argv[0][1] == '\0') { 254 fs = getfsfile("/"); 255 have_fstab = 1; 256 mntfromname = fs->fs_spec; 257 } 258 } 259 if (have_fstab) { 260 options = update_options(options, fs->fs_mntops, 261 mntbuf->f_flags); 262 } else { 263 mntfromname = mntbuf->f_mntfromname; 264 options = update_options(options, NULL, 265 mntbuf->f_flags); 266 } 267 rval = mountfs(mntbuf->f_fstypename, mntfromname, 268 mntbuf->f_mntonname, init_flags, options, 0); 269 break; 270 } 271 if ((fs = getfsfile(*argv)) == NULL && 272 (fs = getfsspec(*argv)) == NULL) 273 errx(1, "%s: unknown special file or file system", 274 *argv); 275 if (BADTYPE(fs->fs_type)) 276 errx(1, "%s has unknown file system type", 277 *argv); 278 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 279 init_flags, options, fs->fs_mntops); 280 break; 281 case 2: 282 /* 283 * If -t flag has not been specified, the path cannot be 284 * found, spec contains either a ':' or a '@', then assume 285 * that an NFS file system is being specified ala Sun. 286 * Check if the hostname contains only allowed characters 287 * to reduce false positives. IPv6 addresses containing 288 * ':' will be correctly parsed only if the separator is '@'. 289 * The definition of a valid hostname is taken from RFC 1034. 290 */ 291 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 292 (ep = strchr(argv[0], ':')) != NULL)) { 293 if (*ep == '@') { 294 cp = ep + 1; 295 ep = cp + strlen(cp); 296 } else 297 cp = argv[0]; 298 while (cp != ep) { 299 if (!isdigit(*cp) && !isalpha(*cp) && 300 *cp != '.' && *cp != '-' && *cp != ':') 301 break; 302 cp++; 303 } 304 if (cp == ep) 305 vfstype = "nfs"; 306 } 307 rval = mountfs(vfstype, 308 argv[0], argv[1], init_flags, options, NULL); 309 break; 310 default: 311 usage(); 312 /* NOTREACHED */ 313 } 314 315 /* 316 * If the mount was successfully, and done by root, tell mountd the 317 * good news. Pid checks are probably unnecessary, but don't hurt. 318 */ 319 if (rval == 0 && getuid() == 0 && 320 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 321 if (fscanf(mountdfp, "%d", &pid) == 1 && 322 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) 323 err(1, "signal mountd"); 324 (void)fclose(mountdfp); 325 } 326 327 exit(rval); 328 } 329 330 int 331 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 332 { 333 int i; 334 335 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 336 /* the root file system can always be remounted */ 337 return (0); 338 339 for (i = mntsize - 1; i >= 0; --i) 340 if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 && 341 (!isremountable(fs->fs_vfstype) || 342 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 343 return (1); 344 return (0); 345 } 346 347 int 348 isremountable(const char *vfsname) 349 { 350 const char **cp; 351 352 for (cp = remountable_fs_names; *cp; cp++) 353 if (strcmp(*cp, vfsname) == 0) 354 return (1); 355 return (0); 356 } 357 358 int 359 hasopt(const char *mntopts, const char *option) 360 { 361 int negative, found; 362 char *opt, *optbuf; 363 364 if (option[0] == 'n' && option[1] == 'o') { 365 negative = 1; 366 option += 2; 367 } else 368 negative = 0; 369 optbuf = strdup(mntopts); 370 found = 0; 371 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 372 if (opt[0] == 'n' && opt[1] == 'o') { 373 if (!strcasecmp(opt + 2, option)) 374 found = negative; 375 } else if (!strcasecmp(opt, option)) 376 found = !negative; 377 } 378 free(optbuf); 379 return (found); 380 } 381 382 int 383 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 384 const char *options, const char *mntopts) 385 { 386 const char *argv[100]; 387 struct statfs sf; 388 pid_t pid; 389 int argc, i, status; 390 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 391 392 #if __GNUC__ 393 (void)&optbuf; 394 (void)&name; 395 #endif 396 397 /* resolve the mountpoint with realpath(3) */ 398 (void)checkpath(name, mntpath); 399 name = mntpath; 400 401 if (mntopts == NULL) 402 mntopts = ""; 403 if (options == NULL) { 404 if (*mntopts == '\0') { 405 options = "rw"; 406 } else { 407 options = mntopts; 408 mntopts = ""; 409 } 410 } 411 optbuf = catopt(strdup(mntopts), options); 412 413 if (strcmp(name, "/") == 0) 414 flags |= MNT_UPDATE; 415 if (flags & MNT_FORCE) 416 optbuf = catopt(optbuf, "force"); 417 if (flags & MNT_RDONLY) 418 optbuf = catopt(optbuf, "ro"); 419 /* 420 * XXX 421 * The mount_mfs (newfs) command uses -o to select the 422 * optimization mode. We don't pass the default "-o rw" 423 * for that reason. 424 */ 425 if (flags & MNT_UPDATE) 426 optbuf = catopt(optbuf, "update"); 427 428 /* Compatibility glue. */ 429 if (strcmp(vfstype, "msdos") == 0) 430 vfstype = "msdosfs"; 431 432 /* Construct the name of the appropriate mount command */ 433 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 434 435 argc = 0; 436 argv[argc++] = execname; 437 mangle(optbuf, &argc, argv); 438 argv[argc++] = spec; 439 argv[argc++] = name; 440 argv[argc] = NULL; 441 442 if (debug) { 443 (void)printf("exec: mount_%s", vfstype); 444 for (i = 1; i < argc; i++) 445 (void)printf(" %s", argv[i]); 446 (void)printf("\n"); 447 return (0); 448 } 449 450 switch (pid = fork()) { 451 case -1: /* Error. */ 452 warn("fork"); 453 free(optbuf); 454 return (1); 455 case 0: /* Child. */ 456 if (strcmp(vfstype, "ufs") == 0) 457 exit(mount_ufs(argc, (char * const *) argv)); 458 459 /* Go find an executable. */ 460 execvP(execname, _PATH_SYSPATH, (char * const *)argv); 461 if (errno == ENOENT) { 462 warn("exec mount_%s not found in %s", vfstype, 463 _PATH_SYSPATH); 464 } 465 exit(1); 466 /* NOTREACHED */ 467 default: /* Parent. */ 468 free(optbuf); 469 470 if (waitpid(pid, &status, 0) < 0) { 471 warn("waitpid"); 472 return (1); 473 } 474 475 if (WIFEXITED(status)) { 476 if (WEXITSTATUS(status) != 0) 477 return (WEXITSTATUS(status)); 478 } else if (WIFSIGNALED(status)) { 479 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 480 return (1); 481 } 482 483 if (verbose) { 484 if (statfs(name, &sf) < 0) { 485 warn("statfs %s", name); 486 return (1); 487 } 488 if (fstab_style) 489 putfsent(&sf); 490 else 491 prmount(&sf); 492 } 493 break; 494 } 495 496 return (0); 497 } 498 499 void 500 prmount(struct statfs *sfp) 501 { 502 int flags; 503 unsigned int i; 504 struct opt *o; 505 struct passwd *pw; 506 507 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 508 sfp->f_fstypename); 509 510 flags = sfp->f_flags & MNT_VISFLAGMASK; 511 for (o = optnames; flags && o->o_opt; o++) 512 if (flags & o->o_opt) { 513 (void)printf(", %s", o->o_name); 514 flags &= ~o->o_opt; 515 } 516 /* 517 * Inform when file system is mounted by an unprivileged user 518 * or privileged non-root user. 519 */ 520 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 521 (void)printf(", mounted by "); 522 if ((pw = getpwuid(sfp->f_owner)) != NULL) 523 (void)printf("%s", pw->pw_name); 524 else 525 (void)printf("%d", sfp->f_owner); 526 } 527 if (verbose) { 528 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 529 (void)printf(", writes: sync %ju async %ju", 530 (uintmax_t)sfp->f_syncwrites, 531 (uintmax_t)sfp->f_asyncwrites); 532 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 533 (void)printf(", reads: sync %ju async %ju", 534 (uintmax_t)sfp->f_syncreads, 535 (uintmax_t)sfp->f_asyncreads); 536 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 537 printf(", fsid "); 538 for (i = 0; i < sizeof(sfp->f_fsid); i++) 539 printf("%02x", ((u_char *)&sfp->f_fsid)[i]); 540 } 541 } 542 (void)printf(")\n"); 543 } 544 545 struct statfs * 546 getmntpt(const char *name) 547 { 548 struct statfs *mntbuf; 549 int i, mntsize; 550 551 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 552 for (i = mntsize - 1; i >= 0; i--) { 553 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 554 strcmp(mntbuf[i].f_mntonname, name) == 0) 555 return (&mntbuf[i]); 556 } 557 return (NULL); 558 } 559 560 char * 561 catopt(char *s0, const char *s1) 562 { 563 size_t i; 564 char *cp; 565 566 if (s1 == NULL || *s1 == '\0') 567 return s0; 568 569 if (s0 && *s0) { 570 i = strlen(s0) + strlen(s1) + 1 + 1; 571 if ((cp = malloc(i)) == NULL) 572 errx(1, "malloc failed"); 573 (void)snprintf(cp, i, "%s,%s", s0, s1); 574 } else 575 cp = strdup(s1); 576 577 if (s0) 578 free(s0); 579 return (cp); 580 } 581 582 void 583 mangle(options, argcp, argv) 584 char *options; 585 int *argcp; 586 const char **argv; 587 { 588 char *p, *s; 589 int argc; 590 591 argc = *argcp; 592 for (s = options; (p = strsep(&s, ",")) != NULL;) 593 if (*p != '\0') { 594 if (*p == '-') { 595 argv[argc++] = p; 596 p = strchr(p, '='); 597 if (p != NULL) { 598 *p = '\0'; 599 argv[argc++] = p+1; 600 } 601 } else if (strcmp(p, "rw") != 0) { 602 argv[argc++] = "-o"; 603 argv[argc++] = p; 604 } 605 } 606 607 *argcp = argc; 608 } 609 610 611 char * 612 update_options(opts, fstab, curflags) 613 char *opts; 614 char *fstab; 615 int curflags; 616 { 617 char *o, *p; 618 char *cur; 619 char *expopt, *newopt, *tmpopt; 620 621 if (opts == NULL) 622 return strdup(""); 623 624 /* remove meta options from list */ 625 remopt(fstab, MOUNT_META_OPTION_FSTAB); 626 remopt(fstab, MOUNT_META_OPTION_CURRENT); 627 cur = flags2opts(curflags); 628 629 /* 630 * Expand all meta-options passed to us first. 631 */ 632 expopt = NULL; 633 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 634 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 635 expopt = catopt(expopt, fstab); 636 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 637 expopt = catopt(expopt, cur); 638 else 639 expopt = catopt(expopt, o); 640 } 641 free(cur); 642 free(opts); 643 644 /* 645 * Remove previous contradictory arguments. Given option "foo" we 646 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 647 * and "foo" - so we can deal with possible options like "notice". 648 */ 649 newopt = NULL; 650 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 651 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 652 errx(1, "malloc failed"); 653 654 strcpy(tmpopt, "no"); 655 strcat(tmpopt, o); 656 remopt(newopt, tmpopt); 657 free(tmpopt); 658 659 if (strncmp("no", o, 2) == 0) 660 remopt(newopt, o+2); 661 662 newopt = catopt(newopt, o); 663 } 664 free(expopt); 665 666 return newopt; 667 } 668 669 void 670 remopt(string, opt) 671 char *string; 672 const char *opt; 673 { 674 char *o, *p, *r; 675 676 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 677 return; 678 679 r = string; 680 681 for (p = string; (o = strsep(&p, ",")) != NULL;) { 682 if (strcmp(opt, o) != 0) { 683 if (*r == ',' && *o != '\0') 684 r++; 685 while ((*r++ = *o++) != '\0') 686 ; 687 *--r = ','; 688 } 689 } 690 *r = '\0'; 691 } 692 693 void 694 usage() 695 { 696 697 (void)fprintf(stderr, "%s\n%s\n%s\n", 698 "usage: mount [-adfpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 699 " mount [-dfpruvw] special | node", 700 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 701 exit(1); 702 } 703 704 void 705 putfsent(ent) 706 const struct statfs *ent; 707 { 708 struct fstab *fst; 709 char *opts; 710 711 opts = flags2opts(ent->f_flags); 712 printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname, 713 ent->f_fstypename, opts); 714 free(opts); 715 716 if ((fst = getfsspec(ent->f_mntfromname))) 717 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 718 else if ((fst = getfsfile(ent->f_mntonname))) 719 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 720 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 721 if (strcmp(ent->f_mntonname, "/") == 0) 722 printf("\t1 1\n"); 723 else 724 printf("\t2 2\n"); 725 } else 726 printf("\t0 0\n"); 727 } 728 729 730 char * 731 flags2opts(flags) 732 int flags; 733 { 734 char *res; 735 736 res = NULL; 737 738 res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw"); 739 740 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 741 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 742 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 743 if (flags & MNT_UNION) res = catopt(res, "union"); 744 if (flags & MNT_ASYNC) res = catopt(res, "async"); 745 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 746 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 747 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 748 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 749 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 750 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 751 if (flags & MNT_ACLS) res = catopt(res, "acls"); 752 753 return res; 754 } 755