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 <stdint.h> 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <unistd.h> 65 66 #include "extern.h" 67 #include "mntopts.h" 68 #include "pathnames.h" 69 70 /* `meta' options */ 71 #define MOUNT_META_OPTION_FSTAB "fstab" 72 #define MOUNT_META_OPTION_CURRENT "current" 73 74 int debug, fstab_style, verbose; 75 76 char *catopt(char *, const char *); 77 struct statfs *getmntpt(const char *); 78 int hasopt(const char *, const char *); 79 int ismounted(struct fstab *, struct statfs *, int); 80 int isremountable(const char *); 81 void mangle(char *, int *, const char **); 82 char *update_options(char *, char *, int); 83 int mountfs(const char *, const char *, const char *, 84 int, const char *, const char *); 85 void remopt(char *, const char *); 86 void prmount(struct statfs *); 87 void putfsent(const struct statfs *); 88 void usage(void); 89 char *flags2opts(int); 90 91 /* Map from mount options to printable formats. */ 92 static struct opt { 93 int o_opt; 94 const char *o_name; 95 } optnames[] = { 96 { MNT_ASYNC, "asynchronous" }, 97 { MNT_EXPORTED, "NFS exported" }, 98 { MNT_LOCAL, "local" }, 99 { MNT_NOATIME, "noatime" }, 100 { MNT_NODEV, "nodev" }, 101 { MNT_NOEXEC, "noexec" }, 102 { MNT_NOSUID, "nosuid" }, 103 { MNT_NOSYMFOLLOW, "nosymfollow" }, 104 { MNT_QUOTA, "with quotas" }, 105 { MNT_RDONLY, "read-only" }, 106 { MNT_SYNCHRONOUS, "synchronous" }, 107 { MNT_UNION, "union" }, 108 { MNT_NOCLUSTERR, "noclusterr" }, 109 { MNT_NOCLUSTERW, "noclusterw" }, 110 { MNT_SUIDDIR, "suiddir" }, 111 { MNT_SOFTDEP, "soft-updates" }, 112 { MNT_MULTILABEL, "multilabel" }, 113 { MNT_ACLS, "acls" }, 114 { 0, NULL } 115 }; 116 117 /* 118 * List of VFS types that can be remounted without becoming mounted on top 119 * of each other. 120 * XXX Is this list correct? 121 */ 122 static const char * 123 remountable_fs_names[] = { 124 "ufs", "ffs", "ext2fs", 125 0 126 }; 127 128 int 129 main(argc, argv) 130 int argc; 131 char * const argv[]; 132 { 133 const char *mntfromname, **vfslist, *vfstype; 134 struct fstab *fs; 135 struct statfs *mntbuf; 136 FILE *mountdfp; 137 pid_t pid; 138 int all, ch, i, init_flags, mntsize, rval, have_fstab; 139 char *cp, *ep, *options; 140 141 all = init_flags = 0; 142 options = NULL; 143 vfslist = NULL; 144 vfstype = "ufs"; 145 while ((ch = getopt(argc, argv, "adF:fo:prwt:uv")) != -1) 146 switch (ch) { 147 case 'a': 148 all = 1; 149 break; 150 case 'd': 151 debug = 1; 152 break; 153 case 'F': 154 setfstab(optarg); 155 break; 156 case 'f': 157 init_flags |= MNT_FORCE; 158 break; 159 case 'o': 160 if (*optarg) 161 options = catopt(options, optarg); 162 break; 163 case 'p': 164 fstab_style = 1; 165 verbose = 1; 166 break; 167 case 'r': 168 options = catopt(options, "ro"); 169 break; 170 case 't': 171 if (vfslist != NULL) 172 errx(1, "only one -t option may be specified"); 173 vfslist = makevfslist(optarg); 174 vfstype = optarg; 175 break; 176 case 'u': 177 init_flags |= MNT_UPDATE; 178 break; 179 case 'v': 180 verbose = 1; 181 break; 182 case 'w': 183 options = catopt(options, "noro"); 184 break; 185 case '?': 186 default: 187 usage(); 188 /* NOTREACHED */ 189 } 190 argc -= optind; 191 argv += optind; 192 193 #define BADTYPE(type) \ 194 (strcmp(type, FSTAB_RO) && \ 195 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 196 197 rval = 0; 198 switch (argc) { 199 case 0: 200 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 201 err(1, "getmntinfo"); 202 if (all) { 203 while ((fs = getfsent()) != NULL) { 204 if (BADTYPE(fs->fs_type)) 205 continue; 206 if (checkvfsname(fs->fs_vfstype, vfslist)) 207 continue; 208 if (hasopt(fs->fs_mntops, "noauto")) 209 continue; 210 if (!(init_flags & MNT_UPDATE) && 211 ismounted(fs, mntbuf, mntsize)) 212 continue; 213 if (mountfs(fs->fs_vfstype, fs->fs_spec, 214 fs->fs_file, init_flags, options, 215 fs->fs_mntops)) 216 rval = 1; 217 } 218 } else if (fstab_style) { 219 for (i = 0; i < mntsize; i++) { 220 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 221 continue; 222 putfsent(&mntbuf[i]); 223 } 224 } else { 225 for (i = 0; i < mntsize; i++) { 226 if (checkvfsname(mntbuf[i].f_fstypename, 227 vfslist)) 228 continue; 229 prmount(&mntbuf[i]); 230 } 231 } 232 exit(rval); 233 case 1: 234 if (vfslist != NULL) 235 usage(); 236 237 if (init_flags & MNT_UPDATE) { 238 mntfromname = NULL; 239 have_fstab = 0; 240 if ((mntbuf = getmntpt(*argv)) == NULL) 241 errx(1, "not currently mounted %s", *argv); 242 /* 243 * Only get the mntflags from fstab if both mntpoint 244 * and mntspec are identical. Also handle the special 245 * case where just '/' is mounted and 'spec' is not 246 * identical with the one from fstab ('/dev' is missing 247 * in the spec-string at boot-time). 248 */ 249 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 250 if (strcmp(fs->fs_spec, 251 mntbuf->f_mntfromname) == 0 && 252 strcmp(fs->fs_file, 253 mntbuf->f_mntonname) == 0) { 254 have_fstab = 1; 255 mntfromname = mntbuf->f_mntfromname; 256 } else if (argv[0][0] == '/' && 257 argv[0][1] == '\0') { 258 fs = getfsfile("/"); 259 have_fstab = 1; 260 mntfromname = fs->fs_spec; 261 } 262 } 263 if (have_fstab) { 264 options = update_options(options, fs->fs_mntops, 265 mntbuf->f_flags); 266 } else { 267 mntfromname = mntbuf->f_mntfromname; 268 options = update_options(options, NULL, 269 mntbuf->f_flags); 270 } 271 rval = mountfs(mntbuf->f_fstypename, mntfromname, 272 mntbuf->f_mntonname, init_flags, options, 0); 273 break; 274 } 275 rmslashes(*argv, *argv); 276 if ((fs = getfsfile(*argv)) == NULL && 277 (fs = getfsspec(*argv)) == NULL) 278 errx(1, "%s: unknown special file or file system", 279 *argv); 280 if (BADTYPE(fs->fs_type)) 281 errx(1, "%s has unknown file system type", 282 *argv); 283 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 284 init_flags, options, fs->fs_mntops); 285 break; 286 case 2: 287 /* 288 * If -t flag has not been specified, the path cannot be 289 * found, spec contains either a ':' or a '@', then assume 290 * that an NFS file system is being specified ala Sun. 291 * Check if the hostname contains only allowed characters 292 * to reduce false positives. IPv6 addresses containing 293 * ':' will be correctly parsed only if the separator is '@'. 294 * The definition of a valid hostname is taken from RFC 1034. 295 */ 296 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 297 (ep = strchr(argv[0], ':')) != NULL)) { 298 if (*ep == '@') { 299 cp = ep + 1; 300 ep = cp + strlen(cp); 301 } else 302 cp = argv[0]; 303 while (cp != ep) { 304 if (!isdigit(*cp) && !isalpha(*cp) && 305 *cp != '.' && *cp != '-' && *cp != ':') 306 break; 307 cp++; 308 } 309 if (cp == ep) 310 vfstype = "nfs"; 311 } 312 rval = mountfs(vfstype, 313 argv[0], argv[1], init_flags, options, NULL); 314 break; 315 default: 316 usage(); 317 /* NOTREACHED */ 318 } 319 320 /* 321 * If the mount was successfully, and done by root, tell mountd the 322 * good news. Pid checks are probably unnecessary, but don't hurt. 323 */ 324 if (rval == 0 && getuid() == 0 && 325 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 326 if (fscanf(mountdfp, "%d", &pid) == 1 && 327 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) 328 err(1, "signal mountd"); 329 (void)fclose(mountdfp); 330 } 331 332 exit(rval); 333 } 334 335 int 336 ismounted(fs, mntbuf, mntsize) 337 struct fstab *fs; 338 struct statfs *mntbuf; 339 int mntsize; 340 { 341 int i; 342 343 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 344 /* the root file system can always be remounted */ 345 return (0); 346 347 for (i = mntsize - 1; i >= 0; --i) 348 if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 && 349 (!isremountable(fs->fs_vfstype) || 350 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 351 return (1); 352 return (0); 353 } 354 355 int 356 isremountable(vfsname) 357 const char *vfsname; 358 { 359 const char **cp; 360 361 for (cp = remountable_fs_names; *cp; cp++) 362 if (strcmp(*cp, vfsname) == 0) 363 return (1); 364 return (0); 365 } 366 367 int 368 hasopt(mntopts, option) 369 const char *mntopts, *option; 370 { 371 int negative, found; 372 char *opt, *optbuf; 373 374 if (option[0] == 'n' && option[1] == 'o') { 375 negative = 1; 376 option += 2; 377 } else 378 negative = 0; 379 optbuf = strdup(mntopts); 380 found = 0; 381 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 382 if (opt[0] == 'n' && opt[1] == 'o') { 383 if (!strcasecmp(opt + 2, option)) 384 found = negative; 385 } else if (!strcasecmp(opt, option)) 386 found = !negative; 387 } 388 free(optbuf); 389 return (found); 390 } 391 392 int 393 mountfs(vfstype, spec, name, flags, options, mntopts) 394 const char *vfstype, *spec, *name, *options, *mntopts; 395 int flags; 396 { 397 const char *argv[100]; 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, 472 _PATH_SYSPATH); 473 } 474 exit(1); 475 /* NOTREACHED */ 476 default: /* Parent. */ 477 free(optbuf); 478 479 if (waitpid(pid, &status, 0) < 0) { 480 warn("waitpid"); 481 return (1); 482 } 483 484 if (WIFEXITED(status)) { 485 if (WEXITSTATUS(status) != 0) 486 return (WEXITSTATUS(status)); 487 } else if (WIFSIGNALED(status)) { 488 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 489 return (1); 490 } 491 492 if (verbose) { 493 if (statfs(name, &sf) < 0) { 494 warn("statfs %s", name); 495 return (1); 496 } 497 if (fstab_style) 498 putfsent(&sf); 499 else 500 prmount(&sf); 501 } 502 break; 503 } 504 505 return (0); 506 } 507 508 void 509 prmount(sfp) 510 struct statfs *sfp; 511 { 512 int flags, i; 513 struct opt *o; 514 struct passwd *pw; 515 516 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 517 sfp->f_fstypename); 518 519 flags = sfp->f_flags & MNT_VISFLAGMASK; 520 for (o = optnames; flags && o->o_opt; o++) 521 if (flags & o->o_opt) { 522 (void)printf(", %s", o->o_name); 523 flags &= ~o->o_opt; 524 } 525 if (sfp->f_owner) { 526 (void)printf(", mounted by "); 527 if ((pw = getpwuid(sfp->f_owner)) != NULL) 528 (void)printf("%s", pw->pw_name); 529 else 530 (void)printf("%d", sfp->f_owner); 531 } 532 if (verbose) { 533 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 534 (void)printf(", writes: sync %ju async %ju", 535 (uintmax_t)sfp->f_syncwrites, 536 (uintmax_t)sfp->f_asyncwrites); 537 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 538 (void)printf(", reads: sync %ju async %ju", 539 (uintmax_t)sfp->f_syncreads, 540 (uintmax_t)sfp->f_asyncreads); 541 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 542 printf(", fsid "); 543 for (i = 0; i < sizeof(sfp->f_fsid); i++) 544 printf("%02x", ((u_char *)&sfp->f_fsid)[i]); 545 } 546 } 547 (void)printf(")\n"); 548 } 549 550 struct statfs * 551 getmntpt(name) 552 const char *name; 553 { 554 struct statfs *mntbuf; 555 int i, mntsize; 556 557 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 558 for (i = mntsize - 1; i >= 0; i--) { 559 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 560 strcmp(mntbuf[i].f_mntonname, name) == 0) 561 return (&mntbuf[i]); 562 } 563 return (NULL); 564 } 565 566 char * 567 catopt(s0, s1) 568 char *s0; 569 const char *s1; 570 { 571 size_t i; 572 char *cp; 573 574 if (s1 == NULL || *s1 == '\0') 575 return s0; 576 577 if (s0 && *s0) { 578 i = strlen(s0) + strlen(s1) + 1 + 1; 579 if ((cp = malloc(i)) == NULL) 580 errx(1, "malloc failed"); 581 (void)snprintf(cp, i, "%s,%s", s0, s1); 582 } else 583 cp = strdup(s1); 584 585 if (s0) 586 free(s0); 587 return (cp); 588 } 589 590 void 591 mangle(options, argcp, argv) 592 char *options; 593 int *argcp; 594 const char **argv; 595 { 596 char *p, *s; 597 int argc; 598 599 argc = *argcp; 600 for (s = options; (p = strsep(&s, ",")) != NULL;) 601 if (*p != '\0') { 602 if (*p == '-') { 603 argv[argc++] = p; 604 p = strchr(p, '='); 605 if (p != NULL) { 606 *p = '\0'; 607 argv[argc++] = p+1; 608 } 609 } else if (strcmp(p, "rw") != 0) { 610 argv[argc++] = "-o"; 611 argv[argc++] = p; 612 } 613 } 614 615 *argcp = argc; 616 } 617 618 619 char * 620 update_options(opts, fstab, curflags) 621 char *opts; 622 char *fstab; 623 int curflags; 624 { 625 char *o, *p; 626 char *cur; 627 char *expopt, *newopt, *tmpopt; 628 629 if (opts == NULL) 630 return strdup(""); 631 632 /* remove meta options from list */ 633 remopt(fstab, MOUNT_META_OPTION_FSTAB); 634 remopt(fstab, MOUNT_META_OPTION_CURRENT); 635 cur = flags2opts(curflags); 636 637 /* 638 * Expand all meta-options passed to us first. 639 */ 640 expopt = NULL; 641 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 642 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 643 expopt = catopt(expopt, fstab); 644 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 645 expopt = catopt(expopt, cur); 646 else 647 expopt = catopt(expopt, o); 648 } 649 free(cur); 650 free(opts); 651 652 /* 653 * Remove previous contradictory arguments. Given option "foo" we 654 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 655 * and "foo" - so we can deal with possible options like "notice". 656 */ 657 newopt = NULL; 658 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 659 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 660 errx(1, "malloc failed"); 661 662 strcpy(tmpopt, "no"); 663 strcat(tmpopt, o); 664 remopt(newopt, tmpopt); 665 free(tmpopt); 666 667 if (strncmp("no", o, 2) == 0) 668 remopt(newopt, o+2); 669 670 newopt = catopt(newopt, o); 671 } 672 free(expopt); 673 674 return newopt; 675 } 676 677 void 678 remopt(string, opt) 679 char *string; 680 const char *opt; 681 { 682 char *o, *p, *r; 683 684 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 685 return; 686 687 r = string; 688 689 for (p = string; (o = strsep(&p, ",")) != NULL;) { 690 if (strcmp(opt, o) != 0) { 691 if (*r == ',' && *o != '\0') 692 r++; 693 while ((*r++ = *o++) != '\0') 694 ; 695 *--r = ','; 696 } 697 } 698 *r = '\0'; 699 } 700 701 void 702 usage() 703 { 704 705 (void)fprintf(stderr, "%s\n%s\n%s\n", 706 "usage: mount [-dfpruvw] [-o options] [-t ufs | external_type] special node", 707 " mount [-adfpruvw] [ -F fstab] [-t ufs | external_type]", 708 " mount [-dfpruvw] special | node"); 709 exit(1); 710 } 711 712 void 713 putfsent(ent) 714 const struct statfs *ent; 715 { 716 struct fstab *fst; 717 char *opts; 718 719 opts = flags2opts(ent->f_flags); 720 printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname, 721 ent->f_fstypename, opts); 722 free(opts); 723 724 if ((fst = getfsspec(ent->f_mntfromname))) 725 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 726 else if ((fst = getfsfile(ent->f_mntonname))) 727 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 728 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 729 if (strcmp(ent->f_mntonname, "/") == 0) 730 printf("\t1 1\n"); 731 else 732 printf("\t2 2\n"); 733 } else 734 printf("\t0 0\n"); 735 } 736 737 738 char * 739 flags2opts(flags) 740 int flags; 741 { 742 char *res; 743 744 res = NULL; 745 746 res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw"); 747 748 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 749 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 750 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 751 if (flags & MNT_NODEV) res = catopt(res, "nodev"); 752 if (flags & MNT_UNION) res = catopt(res, "union"); 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_MULTILABEL) res = catopt(res, "multilabel"); 760 if (flags & MNT_ACLS) res = catopt(res, "acls"); 761 762 return res; 763 } 764