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