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 <pwd.h> 58 #include <signal.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <unistd.h> 63 64 #include "extern.h" 65 #include "mntopts.h" 66 #include "pathnames.h" 67 68 /* `meta' options */ 69 #define MOUNT_META_OPTION_FSTAB "fstab" 70 #define MOUNT_META_OPTION_CURRENT "current" 71 72 int debug, fstab_style, verbose; 73 74 char *catopt(char *, const char *); 75 struct statfs *getmntpt(const char *); 76 int hasopt(const char *, const char *); 77 int ismounted(struct fstab *, struct statfs *, int); 78 int isremountable(const char *); 79 void mangle(char *, int *, const char **); 80 char *update_options(char *, char *, int); 81 int mountfs(const char *, const char *, const char *, 82 int, const char *, const char *); 83 void remopt(char *, const char *); 84 void prmount(struct statfs *); 85 void putfsent(const struct statfs *); 86 void usage(void); 87 char *flags2opts(int); 88 89 /* Map from mount options to printable formats. */ 90 static struct opt { 91 int o_opt; 92 const char *o_name; 93 } optnames[] = { 94 { MNT_ASYNC, "asynchronous" }, 95 { MNT_EXPORTED, "NFS exported" }, 96 { MNT_LOCAL, "local" }, 97 { MNT_NOATIME, "noatime" }, 98 { MNT_NODEV, "nodev" }, 99 { MNT_NOEXEC, "noexec" }, 100 { MNT_NOSUID, "nosuid" }, 101 { MNT_NOSYMFOLLOW, "nosymfollow" }, 102 { MNT_QUOTA, "with quotas" }, 103 { MNT_RDONLY, "read-only" }, 104 { MNT_SYNCHRONOUS, "synchronous" }, 105 { MNT_UNION, "union" }, 106 { MNT_NOCLUSTERR, "noclusterr" }, 107 { MNT_NOCLUSTERW, "noclusterw" }, 108 { MNT_SUIDDIR, "suiddir" }, 109 { MNT_SOFTDEP, "soft-updates" }, 110 { 0, NULL } 111 }; 112 113 /* 114 * List of VFS types that can be remounted without becoming mounted on top 115 * of each other. 116 * XXX Is this list correct? 117 */ 118 static const char * 119 remountable_fs_names[] = { 120 "ufs", "ffs", "ext2fs", 121 0 122 }; 123 124 int 125 main(argc, argv) 126 int argc; 127 char * const argv[]; 128 { 129 const char *mntfromname, **vfslist, *vfstype; 130 struct fstab *fs; 131 struct statfs *mntbuf; 132 FILE *mountdfp; 133 pid_t pid; 134 int all, ch, i, init_flags, mntsize, rval, have_fstab; 135 char *cp, *ep, *options; 136 137 all = init_flags = 0; 138 options = NULL; 139 vfslist = NULL; 140 vfstype = "ufs"; 141 while ((ch = getopt(argc, argv, "adfo:prwt:uv")) != -1) 142 switch (ch) { 143 case 'a': 144 all = 1; 145 break; 146 case 'd': 147 debug = 1; 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 if (mountfs(fs->fs_vfstype, fs->fs_spec, 207 fs->fs_file, init_flags, options, 208 fs->fs_mntops)) 209 rval = 1; 210 } 211 } else if (fstab_style) { 212 for (i = 0; i < mntsize; i++) { 213 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 214 continue; 215 putfsent(&mntbuf[i]); 216 } 217 } else { 218 for (i = 0; i < mntsize; i++) { 219 if (checkvfsname(mntbuf[i].f_fstypename, 220 vfslist)) 221 continue; 222 prmount(&mntbuf[i]); 223 } 224 } 225 exit(rval); 226 case 1: 227 if (vfslist != NULL) 228 usage(); 229 230 if (init_flags & MNT_UPDATE) { 231 mntfromname = NULL; 232 have_fstab = 0; 233 if ((mntbuf = getmntpt(*argv)) == NULL) 234 errx(1, "not currently mounted %s", *argv); 235 /* 236 * Only get the mntflags from fstab if both mntpoint 237 * and mntspec are identical. Also handle the special 238 * case where just '/' is mounted and 'spec' is not 239 * identical with the one from fstab ('/dev' is missing 240 * in the spec-string at boot-time). 241 */ 242 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 243 if (strcmp(fs->fs_spec, 244 mntbuf->f_mntfromname) == 0 && 245 strcmp(fs->fs_file, 246 mntbuf->f_mntonname) == 0) { 247 have_fstab = 1; 248 mntfromname = mntbuf->f_mntfromname; 249 } else if (argv[0][0] == '/' && 250 argv[0][1] == '\0') { 251 fs = getfsfile("/"); 252 have_fstab = 1; 253 mntfromname = fs->fs_spec; 254 } 255 } 256 if (have_fstab) { 257 options = update_options(options, fs->fs_mntops, 258 mntbuf->f_flags); 259 } else { 260 mntfromname = mntbuf->f_mntfromname; 261 options = update_options(options, NULL, 262 mntbuf->f_flags); 263 } 264 rval = mountfs(mntbuf->f_fstypename, mntfromname, 265 mntbuf->f_mntonname, init_flags, options, 0); 266 break; 267 } 268 rmslashes(*argv, *argv); 269 if ((fs = getfsfile(*argv)) == NULL && 270 (fs = getfsspec(*argv)) == NULL) 271 errx(1, "%s: unknown special file or filesystem", 272 *argv); 273 if (BADTYPE(fs->fs_type)) 274 errx(1, "%s has unknown filesystem type", 275 *argv); 276 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 277 init_flags, options, fs->fs_mntops); 278 break; 279 case 2: 280 /* 281 * If -t flag has not been specified, the path cannot be 282 * found, spec contains either a ':' or a '@', then assume 283 * that an NFS filesystem is being specified ala Sun. 284 * Check if the hostname contains only allowed characters 285 * to reduce false positives. IPv6 addresses containing 286 * ':' will be correctly parsed only if the separator is '@'. 287 * The definition of a valid hostname is taken from RFC 1034. 288 */ 289 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL) || 290 ((ep = strchr(argv[0], ':')) != NULL)) { 291 if (*ep == '@') { 292 cp = ep + 1; 293 ep = cp + strlen(cp); 294 } else 295 cp = argv[0]; 296 while (cp != ep) { 297 if (!isdigit(*cp) && !isalpha(*cp) && 298 *cp != '.' && *cp != '-' && *cp != ':') 299 break; 300 cp++; 301 } 302 if (cp == ep) 303 vfstype = "nfs"; 304 } 305 rval = mountfs(vfstype, 306 argv[0], argv[1], init_flags, options, NULL); 307 break; 308 default: 309 usage(); 310 /* NOTREACHED */ 311 } 312 313 /* 314 * If the mount was successfully, and done by root, tell mountd the 315 * good news. Pid checks are probably unnecessary, but don't hurt. 316 */ 317 if (rval == 0 && getuid() == 0 && 318 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 319 if (fscanf(mountdfp, "%d", &pid) == 1 && 320 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) 321 err(1, "signal mountd"); 322 (void)fclose(mountdfp); 323 } 324 325 exit(rval); 326 } 327 328 int 329 ismounted(fs, mntbuf, mntsize) 330 struct fstab *fs; 331 struct statfs *mntbuf; 332 int mntsize; 333 { 334 int i; 335 336 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 337 /* the root filesystem can always be remounted */ 338 return (0); 339 340 for (i = mntsize - 1; i >= 0; --i) 341 if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 && 342 (!isremountable(fs->fs_vfstype) || 343 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 344 return (1); 345 return (0); 346 } 347 348 int 349 isremountable(vfsname) 350 const char *vfsname; 351 { 352 const char **cp; 353 354 for (cp = remountable_fs_names; *cp; cp++) 355 if (strcmp(*cp, vfsname) == 0) 356 return (1); 357 return (0); 358 } 359 360 int 361 hasopt(mntopts, option) 362 const char *mntopts, *option; 363 { 364 int negative, found; 365 char *opt, *optbuf; 366 367 if (option[0] == 'n' && option[1] == 'o') { 368 negative = 1; 369 option += 2; 370 } else 371 negative = 0; 372 optbuf = strdup(mntopts); 373 found = 0; 374 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 375 if (opt[0] == 'n' && opt[1] == 'o') { 376 if (!strcasecmp(opt + 2, option)) 377 found = negative; 378 } else if (!strcasecmp(opt, option)) 379 found = !negative; 380 } 381 free(optbuf); 382 return (found); 383 } 384 385 int 386 mountfs(vfstype, spec, name, flags, options, mntopts) 387 const char *vfstype, *spec, *name, *options, *mntopts; 388 int flags; 389 { 390 /* List of directories containing mount_xxx subcommands. */ 391 static const char *edirs[] = { 392 _PATH_SBIN, 393 _PATH_USRSBIN, 394 NULL 395 }; 396 const char *argv[100], **edir; 397 struct statfs sf; 398 pid_t pid; 399 int argc, i, status; 400 char *optbuf, execname[MAXPATHLEN + 1], mntpath[MAXPATHLEN]; 401 402 #if __GNUC__ 403 (void)&optbuf; 404 (void)&name; 405 #endif 406 407 /* resolve the mountpoint with realpath(3) */ 408 (void)checkpath(name, mntpath); 409 name = mntpath; 410 411 if (mntopts == NULL) 412 mntopts = ""; 413 if (options == NULL) { 414 if (*mntopts == '\0') { 415 options = "rw"; 416 } else { 417 options = mntopts; 418 mntopts = ""; 419 } 420 } 421 optbuf = catopt(strdup(mntopts), options); 422 423 if (strcmp(name, "/") == 0) 424 flags |= MNT_UPDATE; 425 if (flags & MNT_FORCE) 426 optbuf = catopt(optbuf, "force"); 427 if (flags & MNT_RDONLY) 428 optbuf = catopt(optbuf, "ro"); 429 /* 430 * XXX 431 * The mount_mfs (newfs) command uses -o to select the 432 * optimization mode. We don't pass the default "-o rw" 433 * for that reason. 434 */ 435 if (flags & MNT_UPDATE) 436 optbuf = catopt(optbuf, "update"); 437 438 /* Compatibility glue. */ 439 if (strcmp(vfstype, "msdos") == 0) 440 vfstype = "msdosfs"; 441 442 argc = 0; 443 argv[argc++] = vfstype; 444 mangle(optbuf, &argc, argv); 445 argv[argc++] = spec; 446 argv[argc++] = name; 447 argv[argc] = NULL; 448 449 if (debug) { 450 (void)printf("exec: mount_%s", vfstype); 451 for (i = 1; i < argc; i++) 452 (void)printf(" %s", argv[i]); 453 (void)printf("\n"); 454 return (0); 455 } 456 457 switch (pid = fork()) { 458 case -1: /* Error. */ 459 warn("fork"); 460 free(optbuf); 461 return (1); 462 case 0: /* Child. */ 463 if (strcmp(vfstype, "ufs") == 0) 464 exit(mount_ufs(argc, (char * const *) argv)); 465 466 /* Go find an executable. */ 467 for (edir = edirs; *edir; edir++) { 468 (void)snprintf(execname, 469 sizeof(execname), "%s/mount_%s", *edir, vfstype); 470 execv(execname, (char * const *)argv); 471 } 472 if (errno == ENOENT) { 473 int len = 0; 474 char *cp; 475 for (edir = edirs; *edir; edir++) 476 len += strlen(*edir) + 2; /* ", " */ 477 if ((cp = malloc(len)) == NULL) 478 errx(1, "malloc failed"); 479 cp[0] = '\0'; 480 for (edir = edirs; *edir; edir++) { 481 strcat(cp, *edir); 482 if (edir[1] != NULL) 483 strcat(cp, ", "); 484 } 485 warn("exec mount_%s not found in %s", vfstype, cp); 486 } 487 exit(1); 488 /* NOTREACHED */ 489 default: /* Parent. */ 490 free(optbuf); 491 492 if (waitpid(pid, &status, 0) < 0) { 493 warn("waitpid"); 494 return (1); 495 } 496 497 if (WIFEXITED(status)) { 498 if (WEXITSTATUS(status) != 0) 499 return (WEXITSTATUS(status)); 500 } else if (WIFSIGNALED(status)) { 501 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 502 return (1); 503 } 504 505 if (verbose) { 506 if (statfs(name, &sf) < 0) { 507 warn("statfs %s", name); 508 return (1); 509 } 510 if (fstab_style) 511 putfsent(&sf); 512 else 513 prmount(&sf); 514 } 515 break; 516 } 517 518 return (0); 519 } 520 521 void 522 prmount(sfp) 523 struct statfs *sfp; 524 { 525 int flags; 526 struct opt *o; 527 struct passwd *pw; 528 529 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 530 sfp->f_fstypename); 531 532 flags = sfp->f_flags & MNT_VISFLAGMASK; 533 for (o = optnames; flags && o->o_opt; o++) 534 if (flags & o->o_opt) { 535 (void)printf(", %s", o->o_name); 536 flags &= ~o->o_opt; 537 } 538 if (sfp->f_owner) { 539 (void)printf(", mounted by "); 540 if ((pw = getpwuid(sfp->f_owner)) != NULL) 541 (void)printf("%s", pw->pw_name); 542 else 543 (void)printf("%d", sfp->f_owner); 544 } 545 if (verbose) { 546 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 547 (void)printf(", writes: sync %ld async %ld", 548 sfp->f_syncwrites, sfp->f_asyncwrites); 549 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 550 (void)printf(", reads: sync %ld async %ld", 551 sfp->f_syncreads, sfp->f_asyncreads); 552 } 553 (void)printf(")\n"); 554 } 555 556 struct statfs * 557 getmntpt(name) 558 const char *name; 559 { 560 struct statfs *mntbuf; 561 int i, mntsize; 562 563 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 564 for (i = mntsize - 1; i >= 0; i--) { 565 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 566 strcmp(mntbuf[i].f_mntonname, name) == 0) 567 return (&mntbuf[i]); 568 } 569 return (NULL); 570 } 571 572 char * 573 catopt(s0, s1) 574 char *s0; 575 const char *s1; 576 { 577 size_t i; 578 char *cp; 579 580 if (s1 == NULL || *s1 == '\0') 581 return s0; 582 583 if (s0 && *s0) { 584 i = strlen(s0) + strlen(s1) + 1 + 1; 585 if ((cp = malloc(i)) == NULL) 586 errx(1, "malloc failed"); 587 (void)snprintf(cp, i, "%s,%s", s0, s1); 588 } else 589 cp = strdup(s1); 590 591 if (s0) 592 free(s0); 593 return (cp); 594 } 595 596 void 597 mangle(options, argcp, argv) 598 char *options; 599 int *argcp; 600 const char **argv; 601 { 602 char *p, *s; 603 int argc; 604 605 argc = *argcp; 606 for (s = options; (p = strsep(&s, ",")) != NULL;) 607 if (*p != '\0') { 608 if (*p == '-') { 609 argv[argc++] = p; 610 p = strchr(p, '='); 611 if (p) { 612 *p = '\0'; 613 argv[argc++] = p+1; 614 } 615 } else if (strcmp(p, "rw") != 0) { 616 argv[argc++] = "-o"; 617 argv[argc++] = p; 618 } 619 } 620 621 *argcp = argc; 622 } 623 624 625 char * 626 update_options(opts, fstab, curflags) 627 char *opts; 628 char *fstab; 629 int curflags; 630 { 631 char *o, *p; 632 char *cur; 633 char *expopt, *newopt, *tmpopt; 634 635 if (opts == NULL) 636 return strdup(""); 637 638 /* remove meta options from list */ 639 remopt(fstab, MOUNT_META_OPTION_FSTAB); 640 remopt(fstab, MOUNT_META_OPTION_CURRENT); 641 cur = flags2opts(curflags); 642 643 /* 644 * Expand all meta-options passed to us first. 645 */ 646 expopt = NULL; 647 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 648 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 649 expopt = catopt(expopt, fstab); 650 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 651 expopt = catopt(expopt, cur); 652 else 653 expopt = catopt(expopt, o); 654 } 655 free(cur); 656 free(opts); 657 658 /* 659 * Remove previous contradictory arguments. Given option "foo" we 660 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 661 * and "foo" - so we can deal with possible options like "notice". 662 */ 663 newopt = NULL; 664 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 665 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 666 errx(1, "malloc failed"); 667 668 strcpy(tmpopt, "no"); 669 strcat(tmpopt, o); 670 remopt(newopt, tmpopt); 671 free(tmpopt); 672 673 if (strncmp("no", o, 2) == 0) 674 remopt(newopt, o+2); 675 676 newopt = catopt(newopt, o); 677 } 678 free(expopt); 679 680 return newopt; 681 } 682 683 void 684 remopt(string, opt) 685 char *string; 686 const char *opt; 687 { 688 char *o, *p, *r; 689 690 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 691 return; 692 693 r = string; 694 695 for (p = string; (o = strsep(&p, ",")) != NULL;) { 696 if (strcmp(opt, o) != 0) { 697 if (*r == ',' && *o != '\0') 698 r++; 699 while ((*r++ = *o++) != '\0') 700 ; 701 *--r = ','; 702 } 703 } 704 *r = '\0'; 705 } 706 707 void 708 usage() 709 { 710 711 (void)fprintf(stderr, "%s\n%s\n%s\n", 712 "usage: mount [-dfpruvw] [-o options] [-t ufs | external_type] special node", 713 " mount [-adfpruvw] [-t ufs | external_type]", 714 " mount [-dfpruvw] special | node"); 715 exit(1); 716 } 717 718 void 719 putfsent(ent) 720 const struct statfs *ent; 721 { 722 struct fstab *fst; 723 char *opts; 724 725 opts = flags2opts(ent->f_flags); 726 printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname, 727 ent->f_fstypename, opts); 728 free(opts); 729 730 if ((fst = getfsspec(ent->f_mntfromname))) 731 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 732 else if ((fst = getfsfile(ent->f_mntonname))) 733 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 734 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 735 if (strcmp(ent->f_mntonname, "/") == 0) 736 printf("\t1 1\n"); 737 else 738 printf("\t2 2\n"); 739 } else 740 printf("\t0 0\n"); 741 } 742 743 744 char * 745 flags2opts(flags) 746 int flags; 747 { 748 char *res; 749 750 res = NULL; 751 752 res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw"); 753 754 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 755 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 756 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 757 if (flags & MNT_NODEV) res = catopt(res, "nodev"); 758 if (flags & MNT_UNION) res = catopt(res, "union"); 759 if (flags & MNT_ASYNC) res = catopt(res, "async"); 760 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 761 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 762 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 763 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 764 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 765 766 return res; 767 } 768