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