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 #include <libutil.h> 62 63 #include "extern.h" 64 #include "mntopts.h" 65 #include "pathnames.h" 66 67 /* `meta' options */ 68 #define MOUNT_META_OPTION_FSTAB "fstab" 69 #define MOUNT_META_OPTION_CURRENT "current" 70 71 int debug, fstab_style, verbose; 72 73 char *catopt(char *, const char *); 74 struct statfs *getmntpt(const char *); 75 int hasopt(const char *, const char *); 76 int ismounted(struct fstab *, struct statfs *, int); 77 int isremountable(const char *); 78 void mangle(char *, int *, char *[]); 79 char *update_options(char *, char *, int); 80 int mountfs(const char *, const char *, const char *, 81 int, const char *, const char *); 82 void remopt(char *, const char *); 83 void prmount(struct statfs *); 84 void putfsent(const struct statfs *); 85 void usage(void); 86 char *flags2opts(int); 87 88 /* Map from mount options to printable formats. */ 89 static struct opt { 90 int o_opt; 91 const char *o_name; 92 } optnames[] = { 93 { MNT_ASYNC, "asynchronous" }, 94 { MNT_EXPORTED, "NFS exported" }, 95 { MNT_LOCAL, "local" }, 96 { MNT_NOATIME, "noatime" }, 97 { MNT_NOEXEC, "noexec" }, 98 { MNT_NOSUID, "nosuid" }, 99 { MNT_NOSYMFOLLOW, "nosymfollow" }, 100 { MNT_QUOTA, "with quotas" }, 101 { MNT_RDONLY, "read-only" }, 102 { MNT_SYNCHRONOUS, "synchronous" }, 103 { MNT_UNION, "union" }, 104 { MNT_NOCLUSTERR, "noclusterr" }, 105 { MNT_NOCLUSTERW, "noclusterw" }, 106 { MNT_SUIDDIR, "suiddir" }, 107 { MNT_SOFTDEP, "soft-updates" }, 108 { MNT_MULTILABEL, "multilabel" }, 109 { MNT_ACLS, "acls" }, 110 { MNT_GJOURNAL, "gjournal" }, 111 { 0, NULL } 112 }; 113 114 /* 115 * List of VFS types that can be remounted without becoming mounted on top 116 * of each other. 117 * XXX Is this list correct? 118 */ 119 static const char * 120 remountable_fs_names[] = { 121 "ufs", "ffs", "ext2fs", 122 0 123 }; 124 125 static const char userquotaeq[] = "userquota="; 126 static const char groupquotaeq[] = "groupquota="; 127 128 static int 129 use_mountprog(const char *vfstype) 130 { 131 /* XXX: We need to get away from implementing external mount 132 * programs for every filesystem, and move towards having 133 * each filesystem properly implement the nmount() system call. 134 */ 135 unsigned int i; 136 const char *fs[] = { 137 "cd9660", "mfs", "msdosfs", "nfs", "nfs4", "ntfs", 138 "nwfs", "nullfs", "portalfs", "smbfs", "udf", "unionfs", 139 NULL 140 }; 141 142 for (i = 0; fs[i] != NULL; ++i) { 143 if (strcmp(vfstype, fs[i]) == 0) 144 return (1); 145 } 146 147 return (0); 148 } 149 150 static int 151 exec_mountprog(const char *name, const char *execname, char *const argv[]) 152 { 153 pid_t pid; 154 int status; 155 156 switch (pid = fork()) { 157 case -1: /* Error. */ 158 warn("fork"); 159 exit (1); 160 case 0: /* Child. */ 161 /* Go find an executable. */ 162 execvP(execname, _PATH_SYSPATH, argv); 163 if (errno == ENOENT) { 164 warn("exec %s not found in %s", execname, 165 _PATH_SYSPATH); 166 } 167 exit(1); 168 default: /* Parent. */ 169 if (waitpid(pid, &status, 0) < 0) { 170 warn("waitpid"); 171 return (1); 172 } 173 174 if (WIFEXITED(status)) { 175 if (WEXITSTATUS(status) != 0) 176 return (WEXITSTATUS(status)); 177 } else if (WIFSIGNALED(status)) { 178 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 179 return (1); 180 } 181 break; 182 } 183 184 return (0); 185 } 186 187 static int 188 specified_ro(const char *arg) 189 { 190 char *optbuf, *opt; 191 int ret = 0; 192 193 optbuf = strdup(arg); 194 if (optbuf == NULL) 195 err(1, NULL); 196 197 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 198 if (strcmp(opt, "ro") == 0) { 199 ret = 1; 200 break; 201 } 202 } 203 free(optbuf); 204 return (ret); 205 } 206 207 static void 208 restart_mountd(void) 209 { 210 struct pidfh *pfh; 211 pid_t mountdpid; 212 213 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid); 214 if (pfh != NULL) { 215 /* Mountd is not running. */ 216 pidfile_remove(pfh); 217 return; 218 } 219 if (errno != EEXIST) { 220 /* Cannot open pidfile for some reason. */ 221 return; 222 } 223 /* We have mountd(8) PID in mountdpid varible, let's signal it. */ 224 if (kill(mountdpid, SIGHUP) == -1) 225 err(1, "signal mountd"); 226 } 227 228 int 229 main(int argc, char *argv[]) 230 { 231 const char *mntfromname, **vfslist, *vfstype; 232 struct fstab *fs; 233 struct statfs *mntbuf; 234 int all, ch, i, init_flags, late, mntsize, rval, have_fstab, ro; 235 char *cp, *ep, *options; 236 237 all = init_flags = late = 0; 238 ro = 0; 239 options = NULL; 240 vfslist = NULL; 241 vfstype = "ufs"; 242 while ((ch = getopt(argc, argv, "adF:flo:prt:uvw")) != -1) 243 switch (ch) { 244 case 'a': 245 all = 1; 246 break; 247 case 'd': 248 debug = 1; 249 break; 250 case 'F': 251 setfstab(optarg); 252 break; 253 case 'f': 254 init_flags |= MNT_FORCE; 255 break; 256 case 'l': 257 late = 1; 258 break; 259 case 'o': 260 if (*optarg) { 261 options = catopt(options, optarg); 262 if (specified_ro(optarg)) 263 ro = 1; 264 } 265 break; 266 case 'p': 267 fstab_style = 1; 268 verbose = 1; 269 break; 270 case 'r': 271 options = catopt(options, "ro"); 272 ro = 1; 273 break; 274 case 't': 275 if (vfslist != NULL) 276 errx(1, "only one -t option may be specified"); 277 vfslist = makevfslist(optarg); 278 vfstype = optarg; 279 break; 280 case 'u': 281 init_flags |= MNT_UPDATE; 282 break; 283 case 'v': 284 verbose = 1; 285 break; 286 case 'w': 287 options = catopt(options, "noro"); 288 break; 289 case '?': 290 default: 291 usage(); 292 /* NOTREACHED */ 293 } 294 argc -= optind; 295 argv += optind; 296 297 #define BADTYPE(type) \ 298 (strcmp(type, FSTAB_RO) && \ 299 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 300 301 if ((init_flags & MNT_UPDATE) && (ro == 0)) 302 options = catopt(options, "noro"); 303 304 rval = 0; 305 switch (argc) { 306 case 0: 307 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 308 err(1, "getmntinfo"); 309 if (all) { 310 while ((fs = getfsent()) != NULL) { 311 if (BADTYPE(fs->fs_type)) 312 continue; 313 if (checkvfsname(fs->fs_vfstype, vfslist)) 314 continue; 315 if (hasopt(fs->fs_mntops, "noauto")) 316 continue; 317 if (hasopt(fs->fs_mntops, "late") && !late) 318 continue; 319 if (!(init_flags & MNT_UPDATE) && 320 ismounted(fs, mntbuf, mntsize)) 321 continue; 322 options = update_options(options, fs->fs_mntops, 323 mntbuf->f_flags); 324 if (mountfs(fs->fs_vfstype, fs->fs_spec, 325 fs->fs_file, init_flags, options, 326 fs->fs_mntops)) 327 rval = 1; 328 } 329 } else if (fstab_style) { 330 for (i = 0; i < mntsize; i++) { 331 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 332 continue; 333 putfsent(&mntbuf[i]); 334 } 335 } else { 336 for (i = 0; i < mntsize; i++) { 337 if (checkvfsname(mntbuf[i].f_fstypename, 338 vfslist)) 339 continue; 340 prmount(&mntbuf[i]); 341 } 342 } 343 exit(rval); 344 case 1: 345 if (vfslist != NULL) 346 usage(); 347 348 rmslashes(*argv, *argv); 349 if (init_flags & MNT_UPDATE) { 350 mntfromname = NULL; 351 have_fstab = 0; 352 if ((mntbuf = getmntpt(*argv)) == NULL) 353 errx(1, "not currently mounted %s", *argv); 354 /* 355 * Only get the mntflags from fstab if both mntpoint 356 * and mntspec are identical. Also handle the special 357 * case where just '/' is mounted and 'spec' is not 358 * identical with the one from fstab ('/dev' is missing 359 * in the spec-string at boot-time). 360 */ 361 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 362 if (strcmp(fs->fs_spec, 363 mntbuf->f_mntfromname) == 0 && 364 strcmp(fs->fs_file, 365 mntbuf->f_mntonname) == 0) { 366 have_fstab = 1; 367 mntfromname = mntbuf->f_mntfromname; 368 } else if (argv[0][0] == '/' && 369 argv[0][1] == '\0') { 370 fs = getfsfile("/"); 371 have_fstab = 1; 372 mntfromname = fs->fs_spec; 373 } 374 } 375 if (have_fstab) { 376 options = update_options(options, fs->fs_mntops, 377 mntbuf->f_flags); 378 } else { 379 mntfromname = mntbuf->f_mntfromname; 380 options = update_options(options, NULL, 381 mntbuf->f_flags); 382 } 383 rval = mountfs(mntbuf->f_fstypename, mntfromname, 384 mntbuf->f_mntonname, init_flags, options, 0); 385 break; 386 } 387 if ((fs = getfsfile(*argv)) == NULL && 388 (fs = getfsspec(*argv)) == NULL) 389 errx(1, "%s: unknown special file or file system", 390 *argv); 391 if (BADTYPE(fs->fs_type)) 392 errx(1, "%s has unknown file system type", 393 *argv); 394 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 395 init_flags, options, fs->fs_mntops); 396 break; 397 case 2: 398 /* 399 * If -t flag has not been specified, the path cannot be 400 * found, spec contains either a ':' or a '@', then assume 401 * that an NFS file system is being specified ala Sun. 402 * Check if the hostname contains only allowed characters 403 * to reduce false positives. IPv6 addresses containing 404 * ':' will be correctly parsed only if the separator is '@'. 405 * The definition of a valid hostname is taken from RFC 1034. 406 */ 407 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 408 (ep = strchr(argv[0], ':')) != NULL)) { 409 if (*ep == '@') { 410 cp = ep + 1; 411 ep = cp + strlen(cp); 412 } else 413 cp = argv[0]; 414 while (cp != ep) { 415 if (!isdigit(*cp) && !isalpha(*cp) && 416 *cp != '.' && *cp != '-' && *cp != ':') 417 break; 418 cp++; 419 } 420 if (cp == ep) 421 vfstype = "nfs"; 422 } 423 rval = mountfs(vfstype, 424 argv[0], argv[1], init_flags, options, NULL); 425 break; 426 default: 427 usage(); 428 /* NOTREACHED */ 429 } 430 431 /* 432 * If the mount was successfully, and done by root, tell mountd the 433 * good news. 434 */ 435 if (rval == 0 && getuid() == 0) 436 restart_mountd(); 437 438 exit(rval); 439 } 440 441 int 442 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 443 { 444 char realfsfile[PATH_MAX]; 445 int i; 446 447 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 448 /* the root file system can always be remounted */ 449 return (0); 450 451 /* The user may have specified a symlink in fstab, resolve the path */ 452 if (realpath(fs->fs_file, realfsfile) == NULL) { 453 /* Cannot resolve the path, use original one */ 454 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 455 } 456 457 for (i = mntsize - 1; i >= 0; --i) 458 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 459 (!isremountable(fs->fs_vfstype) || 460 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 461 return (1); 462 return (0); 463 } 464 465 int 466 isremountable(const char *vfsname) 467 { 468 const char **cp; 469 470 for (cp = remountable_fs_names; *cp; cp++) 471 if (strcmp(*cp, vfsname) == 0) 472 return (1); 473 return (0); 474 } 475 476 int 477 hasopt(const char *mntopts, const char *option) 478 { 479 int negative, found; 480 char *opt, *optbuf; 481 482 if (option[0] == 'n' && option[1] == 'o') { 483 negative = 1; 484 option += 2; 485 } else 486 negative = 0; 487 optbuf = strdup(mntopts); 488 found = 0; 489 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 490 if (opt[0] == 'n' && opt[1] == 'o') { 491 if (!strcasecmp(opt + 2, option)) 492 found = negative; 493 } else if (!strcasecmp(opt, option)) 494 found = !negative; 495 } 496 free(optbuf); 497 return (found); 498 } 499 500 int 501 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 502 const char *options, const char *mntopts) 503 { 504 char *argv[100]; 505 struct statfs sf; 506 int argc, i, ret; 507 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 508 509 /* resolve the mountpoint with realpath(3) */ 510 (void)checkpath(name, mntpath); 511 name = mntpath; 512 513 if (mntopts == NULL) 514 mntopts = ""; 515 optbuf = catopt(strdup(mntopts), options); 516 517 if (strcmp(name, "/") == 0) 518 flags |= MNT_UPDATE; 519 if (flags & MNT_FORCE) 520 optbuf = catopt(optbuf, "force"); 521 if (flags & MNT_RDONLY) 522 optbuf = catopt(optbuf, "ro"); 523 /* 524 * XXX 525 * The mount_mfs (newfs) command uses -o to select the 526 * optimization mode. We don't pass the default "-o rw" 527 * for that reason. 528 */ 529 if (flags & MNT_UPDATE) 530 optbuf = catopt(optbuf, "update"); 531 532 /* Compatibility glue. */ 533 if (strcmp(vfstype, "msdos") == 0) { 534 warnx( 535 "Using \"-t msdosfs\", since \"-t msdos\" is deprecated."); 536 vfstype = "msdosfs"; 537 } 538 539 /* Construct the name of the appropriate mount command */ 540 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 541 542 argc = 0; 543 argv[argc++] = execname; 544 mangle(optbuf, &argc, argv); 545 argv[argc++] = strdup(spec); 546 argv[argc++] = strdup(name); 547 argv[argc] = NULL; 548 549 if (debug) { 550 if (use_mountprog(vfstype)) 551 printf("exec: mount_%s", vfstype); 552 else 553 printf("mount -t %s", vfstype); 554 for (i = 1; i < argc; i++) 555 (void)printf(" %s", argv[i]); 556 (void)printf("\n"); 557 return (0); 558 } 559 560 if (use_mountprog(vfstype)) { 561 ret = exec_mountprog(name, execname, argv); 562 } else { 563 ret = mount_fs(vfstype, argc, argv); 564 } 565 566 free(optbuf); 567 568 if (verbose) { 569 if (statfs(name, &sf) < 0) { 570 warn("statfs %s", name); 571 return (1); 572 } 573 if (fstab_style) 574 putfsent(&sf); 575 else 576 prmount(&sf); 577 } 578 579 return (0); 580 } 581 582 void 583 prmount(struct statfs *sfp) 584 { 585 int flags; 586 unsigned int i; 587 struct opt *o; 588 struct passwd *pw; 589 590 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 591 sfp->f_fstypename); 592 593 flags = sfp->f_flags & MNT_VISFLAGMASK; 594 for (o = optnames; flags && o->o_opt; o++) 595 if (flags & o->o_opt) { 596 (void)printf(", %s", o->o_name); 597 flags &= ~o->o_opt; 598 } 599 /* 600 * Inform when file system is mounted by an unprivileged user 601 * or privileged non-root user. 602 */ 603 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 604 (void)printf(", mounted by "); 605 if ((pw = getpwuid(sfp->f_owner)) != NULL) 606 (void)printf("%s", pw->pw_name); 607 else 608 (void)printf("%d", sfp->f_owner); 609 } 610 if (verbose) { 611 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 612 (void)printf(", writes: sync %ju async %ju", 613 (uintmax_t)sfp->f_syncwrites, 614 (uintmax_t)sfp->f_asyncwrites); 615 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 616 (void)printf(", reads: sync %ju async %ju", 617 (uintmax_t)sfp->f_syncreads, 618 (uintmax_t)sfp->f_asyncreads); 619 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 620 printf(", fsid "); 621 for (i = 0; i < sizeof(sfp->f_fsid); i++) 622 printf("%02x", ((u_char *)&sfp->f_fsid)[i]); 623 } 624 } 625 (void)printf(")\n"); 626 } 627 628 struct statfs * 629 getmntpt(const char *name) 630 { 631 struct statfs *mntbuf; 632 int i, mntsize; 633 634 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 635 for (i = mntsize - 1; i >= 0; i--) { 636 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 637 strcmp(mntbuf[i].f_mntonname, name) == 0) 638 return (&mntbuf[i]); 639 } 640 return (NULL); 641 } 642 643 char * 644 catopt(char *s0, const char *s1) 645 { 646 size_t i; 647 char *cp; 648 649 if (s1 == NULL || *s1 == '\0') 650 return (s0); 651 652 if (s0 && *s0) { 653 i = strlen(s0) + strlen(s1) + 1 + 1; 654 if ((cp = malloc(i)) == NULL) 655 errx(1, "malloc failed"); 656 (void)snprintf(cp, i, "%s,%s", s0, s1); 657 } else 658 cp = strdup(s1); 659 660 if (s0) 661 free(s0); 662 return (cp); 663 } 664 665 void 666 mangle(char *options, int *argcp, char *argv[]) 667 { 668 char *p, *s; 669 int argc; 670 671 argc = *argcp; 672 for (s = options; (p = strsep(&s, ",")) != NULL;) 673 if (*p != '\0') { 674 if (strcmp(p, "noauto") == 0) { 675 /* 676 * Do not pass noauto option to nmount(). 677 * or external mount program. noauto is 678 * only used to prevent mounting a filesystem 679 * when 'mount -a' is specified, and is 680 * not a real mount option. 681 */ 682 continue; 683 } else if (strcmp(p, "late") == 0) { 684 /* 685 * "late" is used to prevent certain file 686 * systems from being mounted before late 687 * in the boot cycle; for instance, 688 * loopback NFS mounts can't be mounted 689 * before mountd starts. 690 */ 691 continue; 692 } else if (strcmp(p, "userquota") == 0) { 693 continue; 694 } else if (strncmp(p, userquotaeq, 695 sizeof(userquotaeq) - 1) == 0) { 696 continue; 697 } else if (strcmp(p, "groupquota") == 0) { 698 continue; 699 } else if (strncmp(p, groupquotaeq, 700 sizeof(groupquotaeq) - 1) == 0) { 701 continue; 702 } else if (*p == '-') { 703 argv[argc++] = p; 704 p = strchr(p, '='); 705 if (p != NULL) { 706 *p = '\0'; 707 argv[argc++] = p+1; 708 } 709 } else { 710 argv[argc++] = strdup("-o"); 711 argv[argc++] = p; 712 } 713 } 714 715 *argcp = argc; 716 } 717 718 719 char * 720 update_options(char *opts, char *fstab, int curflags) 721 { 722 char *o, *p; 723 char *cur; 724 char *expopt, *newopt, *tmpopt; 725 726 if (opts == NULL) 727 return (strdup("")); 728 729 /* remove meta options from list */ 730 remopt(fstab, MOUNT_META_OPTION_FSTAB); 731 remopt(fstab, MOUNT_META_OPTION_CURRENT); 732 cur = flags2opts(curflags); 733 734 /* 735 * Expand all meta-options passed to us first. 736 */ 737 expopt = NULL; 738 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 739 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 740 expopt = catopt(expopt, fstab); 741 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 742 expopt = catopt(expopt, cur); 743 else 744 expopt = catopt(expopt, o); 745 } 746 free(cur); 747 free(opts); 748 749 /* 750 * Remove previous contradictory arguments. Given option "foo" we 751 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 752 * and "foo" - so we can deal with possible options like "notice". 753 */ 754 newopt = NULL; 755 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 756 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 757 errx(1, "malloc failed"); 758 759 strcpy(tmpopt, "no"); 760 strcat(tmpopt, o); 761 remopt(newopt, tmpopt); 762 free(tmpopt); 763 764 if (strncmp("no", o, 2) == 0) 765 remopt(newopt, o+2); 766 767 newopt = catopt(newopt, o); 768 } 769 free(expopt); 770 771 return (newopt); 772 } 773 774 void 775 remopt(char *string, const char *opt) 776 { 777 char *o, *p, *r; 778 779 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 780 return; 781 782 r = string; 783 784 for (p = string; (o = strsep(&p, ",")) != NULL;) { 785 if (strcmp(opt, o) != 0) { 786 if (*r == ',' && *o != '\0') 787 r++; 788 while ((*r++ = *o++) != '\0') 789 ; 790 *--r = ','; 791 } 792 } 793 *r = '\0'; 794 } 795 796 void 797 usage(void) 798 { 799 800 (void)fprintf(stderr, "%s\n%s\n%s\n", 801 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 802 " mount [-dfpruvw] special | node", 803 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 804 exit(1); 805 } 806 807 void 808 putfsent(const struct statfs *ent) 809 { 810 struct fstab *fst; 811 char *opts; 812 int l; 813 814 opts = flags2opts(ent->f_flags); 815 816 /* 817 * "rw" is not a real mount option; this is why we print NULL as "rw" 818 * if opts is still NULL here. 819 */ 820 l = strlen(ent->f_mntfromname); 821 printf("%s%s%s%s", ent->f_mntfromname, 822 l < 8 ? "\t" : "", 823 l < 16 ? "\t" : "", 824 l < 24 ? "\t" : " "); 825 l = strlen(ent->f_mntonname); 826 printf("%s%s%s%s", ent->f_mntonname, 827 l < 8 ? "\t" : "", 828 l < 16 ? "\t" : "", 829 l < 24 ? "\t" : " "); 830 printf("%s\t", ent->f_fstypename); 831 if (opts == NULL) { 832 printf("%s\t", "rw"); 833 } else { 834 l = strlen(opts); 835 printf("%s%s", opts, 836 l < 8 ? "\t" : " "); 837 } 838 free(opts); 839 840 if ((fst = getfsspec(ent->f_mntfromname))) 841 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 842 else if ((fst = getfsfile(ent->f_mntonname))) 843 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 844 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 845 if (strcmp(ent->f_mntonname, "/") == 0) 846 printf("\t1 1\n"); 847 else 848 printf("\t2 2\n"); 849 } else 850 printf("\t0 0\n"); 851 } 852 853 854 char * 855 flags2opts(int flags) 856 { 857 char *res; 858 859 res = NULL; 860 861 if (flags & MNT_RDONLY) res = catopt(res, "ro"); 862 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 863 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 864 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 865 if (flags & MNT_UNION) res = catopt(res, "union"); 866 if (flags & MNT_ASYNC) res = catopt(res, "async"); 867 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 868 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 869 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 870 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 871 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 872 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 873 if (flags & MNT_ACLS) res = catopt(res, "acls"); 874 if (flags & MNT_GJOURNAL) res = catopt(res, "gjournal"); 875 876 return (res); 877 } 878