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