mount.c revision 105118
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 35static 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 42static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95"; 43#endif 44static const char rcsid[] = 45 "$FreeBSD: head/sbin/mount/mount.c 105118 2002-10-14 19:40:00Z rwatson $"; 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 72int debug, fstab_style, verbose; 73 74char *catopt(char *, const char *); 75struct statfs *getmntpt(const char *); 76int hasopt(const char *, const char *); 77int ismounted(struct fstab *, struct statfs *, int); 78int isremountable(const char *); 79void mangle(char *, int *, const char **); 80char *update_options(char *, char *, int); 81int mountfs(const char *, const char *, const char *, 82 int, const char *, const char *); 83void remopt(char *, const char *); 84void prmount(struct statfs *); 85void putfsent(const struct statfs *); 86void usage(void); 87char *flags2opts(int); 88 89/* Map from mount options to printable formats. */ 90static 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 { MNT_MULTILABEL, "multilabel" }, 111 { MNT_ACLS, "acls" }, 112 { 0, NULL } 113}; 114 115/* 116 * List of VFS types that can be remounted without becoming mounted on top 117 * of each other. 118 * XXX Is this list correct? 119 */ 120static const char * 121remountable_fs_names[] = { 122 "ufs", "ffs", "ext2fs", 123 0 124}; 125 126int 127main(argc, argv) 128 int argc; 129 char * const argv[]; 130{ 131 const char *mntfromname, **vfslist, *vfstype; 132 struct fstab *fs; 133 struct statfs *mntbuf; 134 FILE *mountdfp; 135 pid_t pid; 136 int all, ch, i, init_flags, mntsize, rval, have_fstab; 137 char *cp, *ep, *options; 138 139 all = init_flags = 0; 140 options = NULL; 141 vfslist = NULL; 142 vfstype = "ufs"; 143 while ((ch = getopt(argc, argv, "adfo:prwt:uv")) != -1) 144 switch (ch) { 145 case 'a': 146 all = 1; 147 break; 148 case 'd': 149 debug = 1; 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 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 if (init_flags & MNT_UPDATE) { 233 mntfromname = NULL; 234 have_fstab = 0; 235 if ((mntbuf = getmntpt(*argv)) == NULL) 236 errx(1, "not currently mounted %s", *argv); 237 /* 238 * Only get the mntflags from fstab if both mntpoint 239 * and mntspec are identical. Also handle the special 240 * case where just '/' is mounted and 'spec' is not 241 * identical with the one from fstab ('/dev' is missing 242 * in the spec-string at boot-time). 243 */ 244 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 245 if (strcmp(fs->fs_spec, 246 mntbuf->f_mntfromname) == 0 && 247 strcmp(fs->fs_file, 248 mntbuf->f_mntonname) == 0) { 249 have_fstab = 1; 250 mntfromname = mntbuf->f_mntfromname; 251 } else if (argv[0][0] == '/' && 252 argv[0][1] == '\0') { 253 fs = getfsfile("/"); 254 have_fstab = 1; 255 mntfromname = fs->fs_spec; 256 } 257 } 258 if (have_fstab) { 259 options = update_options(options, fs->fs_mntops, 260 mntbuf->f_flags); 261 } else { 262 mntfromname = mntbuf->f_mntfromname; 263 options = update_options(options, NULL, 264 mntbuf->f_flags); 265 } 266 rval = mountfs(mntbuf->f_fstypename, mntfromname, 267 mntbuf->f_mntonname, init_flags, options, 0); 268 break; 269 } 270 rmslashes(*argv, *argv); 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 330int 331ismounted(fs, mntbuf, mntsize) 332 struct fstab *fs; 333 struct statfs *mntbuf; 334 int mntsize; 335{ 336 int i; 337 338 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 339 /* the root file system can always be remounted */ 340 return (0); 341 342 for (i = mntsize - 1; i >= 0; --i) 343 if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 && 344 (!isremountable(fs->fs_vfstype) || 345 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 346 return (1); 347 return (0); 348} 349 350int 351isremountable(vfsname) 352 const char *vfsname; 353{ 354 const char **cp; 355 356 for (cp = remountable_fs_names; *cp; cp++) 357 if (strcmp(*cp, vfsname) == 0) 358 return (1); 359 return (0); 360} 361 362int 363hasopt(mntopts, option) 364 const char *mntopts, *option; 365{ 366 int negative, found; 367 char *opt, *optbuf; 368 369 if (option[0] == 'n' && option[1] == 'o') { 370 negative = 1; 371 option += 2; 372 } else 373 negative = 0; 374 optbuf = strdup(mntopts); 375 found = 0; 376 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 377 if (opt[0] == 'n' && opt[1] == 'o') { 378 if (!strcasecmp(opt + 2, option)) 379 found = negative; 380 } else if (!strcasecmp(opt, option)) 381 found = !negative; 382 } 383 free(optbuf); 384 return (found); 385} 386 387int 388mountfs(vfstype, spec, name, flags, options, mntopts) 389 const char *vfstype, *spec, *name, *options, *mntopts; 390 int flags; 391{ 392 /* List of directories containing mount_xxx subcommands. */ 393 static const char *edirs[] = { 394 _PATH_SBIN, 395 _PATH_USRSBIN, 396 NULL 397 }; 398 const char *argv[100], **edir; 399 struct statfs sf; 400 pid_t pid; 401 int argc, i, status; 402 char *optbuf, execname[MAXPATHLEN + 1], mntpath[MAXPATHLEN]; 403 404#if __GNUC__ 405 (void)&optbuf; 406 (void)&name; 407#endif 408 409 /* resolve the mountpoint with realpath(3) */ 410 (void)checkpath(name, mntpath); 411 name = mntpath; 412 413 if (mntopts == NULL) 414 mntopts = ""; 415 if (options == NULL) { 416 if (*mntopts == '\0') { 417 options = "rw"; 418 } else { 419 options = mntopts; 420 mntopts = ""; 421 } 422 } 423 optbuf = catopt(strdup(mntopts), options); 424 425 if (strcmp(name, "/") == 0) 426 flags |= MNT_UPDATE; 427 if (flags & MNT_FORCE) 428 optbuf = catopt(optbuf, "force"); 429 if (flags & MNT_RDONLY) 430 optbuf = catopt(optbuf, "ro"); 431 /* 432 * XXX 433 * The mount_mfs (newfs) command uses -o to select the 434 * optimization mode. We don't pass the default "-o rw" 435 * for that reason. 436 */ 437 if (flags & MNT_UPDATE) 438 optbuf = catopt(optbuf, "update"); 439 440 /* Compatibility glue. */ 441 if (strcmp(vfstype, "msdos") == 0) 442 vfstype = "msdosfs"; 443 444 argc = 0; 445 argv[argc++] = vfstype; 446 mangle(optbuf, &argc, argv); 447 argv[argc++] = spec; 448 argv[argc++] = name; 449 argv[argc] = NULL; 450 451 if (debug) { 452 (void)printf("exec: mount_%s", vfstype); 453 for (i = 1; i < argc; i++) 454 (void)printf(" %s", argv[i]); 455 (void)printf("\n"); 456 return (0); 457 } 458 459 switch (pid = fork()) { 460 case -1: /* Error. */ 461 warn("fork"); 462 free(optbuf); 463 return (1); 464 case 0: /* Child. */ 465 if (strcmp(vfstype, "ufs") == 0) 466 exit(mount_ufs(argc, (char * const *) argv)); 467 468 /* Go find an executable. */ 469 for (edir = edirs; *edir; edir++) { 470 (void)snprintf(execname, 471 sizeof(execname), "%s/mount_%s", *edir, vfstype); 472 execv(execname, (char * const *)argv); 473 } 474 if (errno == ENOENT) { 475 int len = 0; 476 char *cp; 477 for (edir = edirs; *edir; edir++) 478 len += strlen(*edir) + 2; /* ", " */ 479 if ((cp = malloc(len)) == NULL) 480 errx(1, "malloc failed"); 481 cp[0] = '\0'; 482 for (edir = edirs; *edir; edir++) { 483 strcat(cp, *edir); 484 if (edir[1] != NULL) 485 strcat(cp, ", "); 486 } 487 warn("exec mount_%s not found in %s", vfstype, cp); 488 } 489 exit(1); 490 /* NOTREACHED */ 491 default: /* Parent. */ 492 free(optbuf); 493 494 if (waitpid(pid, &status, 0) < 0) { 495 warn("waitpid"); 496 return (1); 497 } 498 499 if (WIFEXITED(status)) { 500 if (WEXITSTATUS(status) != 0) 501 return (WEXITSTATUS(status)); 502 } else if (WIFSIGNALED(status)) { 503 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 504 return (1); 505 } 506 507 if (verbose) { 508 if (statfs(name, &sf) < 0) { 509 warn("statfs %s", name); 510 return (1); 511 } 512 if (fstab_style) 513 putfsent(&sf); 514 else 515 prmount(&sf); 516 } 517 break; 518 } 519 520 return (0); 521} 522 523void 524prmount(sfp) 525 struct statfs *sfp; 526{ 527 int flags; 528 struct opt *o; 529 struct passwd *pw; 530 531 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 532 sfp->f_fstypename); 533 534 flags = sfp->f_flags & MNT_VISFLAGMASK; 535 for (o = optnames; flags && o->o_opt; o++) 536 if (flags & o->o_opt) { 537 (void)printf(", %s", o->o_name); 538 flags &= ~o->o_opt; 539 } 540 if (sfp->f_owner) { 541 (void)printf(", mounted by "); 542 if ((pw = getpwuid(sfp->f_owner)) != NULL) 543 (void)printf("%s", pw->pw_name); 544 else 545 (void)printf("%d", sfp->f_owner); 546 } 547 if (verbose) { 548 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 549 (void)printf(", writes: sync %ld async %ld", 550 sfp->f_syncwrites, sfp->f_asyncwrites); 551 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 552 (void)printf(", reads: sync %ld async %ld", 553 sfp->f_syncreads, sfp->f_asyncreads); 554 } 555 (void)printf(")\n"); 556} 557 558struct statfs * 559getmntpt(name) 560 const char *name; 561{ 562 struct statfs *mntbuf; 563 int i, mntsize; 564 565 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 566 for (i = mntsize - 1; i >= 0; i--) { 567 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 568 strcmp(mntbuf[i].f_mntonname, name) == 0) 569 return (&mntbuf[i]); 570 } 571 return (NULL); 572} 573 574char * 575catopt(s0, s1) 576 char *s0; 577 const char *s1; 578{ 579 size_t i; 580 char *cp; 581 582 if (s1 == NULL || *s1 == '\0') 583 return s0; 584 585 if (s0 && *s0) { 586 i = strlen(s0) + strlen(s1) + 1 + 1; 587 if ((cp = malloc(i)) == NULL) 588 errx(1, "malloc failed"); 589 (void)snprintf(cp, i, "%s,%s", s0, s1); 590 } else 591 cp = strdup(s1); 592 593 if (s0) 594 free(s0); 595 return (cp); 596} 597 598void 599mangle(options, argcp, argv) 600 char *options; 601 int *argcp; 602 const char **argv; 603{ 604 char *p, *s; 605 int argc; 606 607 argc = *argcp; 608 for (s = options; (p = strsep(&s, ",")) != NULL;) 609 if (*p != '\0') { 610 if (*p == '-') { 611 argv[argc++] = p; 612 p = strchr(p, '='); 613 if (p) { 614 *p = '\0'; 615 argv[argc++] = p+1; 616 } 617 } else if (strcmp(p, "rw") != 0) { 618 argv[argc++] = "-o"; 619 argv[argc++] = p; 620 } 621 } 622 623 *argcp = argc; 624} 625 626 627char * 628update_options(opts, fstab, curflags) 629 char *opts; 630 char *fstab; 631 int curflags; 632{ 633 char *o, *p; 634 char *cur; 635 char *expopt, *newopt, *tmpopt; 636 637 if (opts == NULL) 638 return strdup(""); 639 640 /* remove meta options from list */ 641 remopt(fstab, MOUNT_META_OPTION_FSTAB); 642 remopt(fstab, MOUNT_META_OPTION_CURRENT); 643 cur = flags2opts(curflags); 644 645 /* 646 * Expand all meta-options passed to us first. 647 */ 648 expopt = NULL; 649 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 650 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 651 expopt = catopt(expopt, fstab); 652 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 653 expopt = catopt(expopt, cur); 654 else 655 expopt = catopt(expopt, o); 656 } 657 free(cur); 658 free(opts); 659 660 /* 661 * Remove previous contradictory arguments. Given option "foo" we 662 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 663 * and "foo" - so we can deal with possible options like "notice". 664 */ 665 newopt = NULL; 666 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 667 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 668 errx(1, "malloc failed"); 669 670 strcpy(tmpopt, "no"); 671 strcat(tmpopt, o); 672 remopt(newopt, tmpopt); 673 free(tmpopt); 674 675 if (strncmp("no", o, 2) == 0) 676 remopt(newopt, o+2); 677 678 newopt = catopt(newopt, o); 679 } 680 free(expopt); 681 682 return newopt; 683} 684 685void 686remopt(string, opt) 687 char *string; 688 const char *opt; 689{ 690 char *o, *p, *r; 691 692 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 693 return; 694 695 r = string; 696 697 for (p = string; (o = strsep(&p, ",")) != NULL;) { 698 if (strcmp(opt, o) != 0) { 699 if (*r == ',' && *o != '\0') 700 r++; 701 while ((*r++ = *o++) != '\0') 702 ; 703 *--r = ','; 704 } 705 } 706 *r = '\0'; 707} 708 709void 710usage() 711{ 712 713 (void)fprintf(stderr, "%s\n%s\n%s\n", 714"usage: mount [-dfpruvw] [-o options] [-t ufs | external_type] special node", 715" mount [-adfpruvw] [-t ufs | external_type]", 716" mount [-dfpruvw] special | node"); 717 exit(1); 718} 719 720void 721putfsent(ent) 722 const struct statfs *ent; 723{ 724 struct fstab *fst; 725 char *opts; 726 727 opts = flags2opts(ent->f_flags); 728 printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname, 729 ent->f_fstypename, opts); 730 free(opts); 731 732 if ((fst = getfsspec(ent->f_mntfromname))) 733 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 734 else if ((fst = getfsfile(ent->f_mntonname))) 735 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 736 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 737 if (strcmp(ent->f_mntonname, "/") == 0) 738 printf("\t1 1\n"); 739 else 740 printf("\t2 2\n"); 741 } else 742 printf("\t0 0\n"); 743} 744 745 746char * 747flags2opts(flags) 748 int flags; 749{ 750 char *res; 751 752 res = NULL; 753 754 res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw"); 755 756 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 757 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 758 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 759 if (flags & MNT_NODEV) res = catopt(res, "nodev"); 760 if (flags & MNT_UNION) res = catopt(res, "union"); 761 if (flags & MNT_ASYNC) res = catopt(res, "async"); 762 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 763 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 764 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 765 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 766 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 767 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 768 if (flags & MNT_ACLS) res = catopt(res, "acls"); 769 770 return res; 771} 772