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 #if 0 35 static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95"; 36 #endif 37 #endif /* not lint */ 38 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include <sys/param.h> 43 #include <sys/mount.h> 44 #include <sys/stat.h> 45 #include <sys/wait.h> 46 47 #include <ctype.h> 48 #include <err.h> 49 #include <errno.h> 50 #include <fstab.h> 51 #include <paths.h> 52 #include <pwd.h> 53 #include <signal.h> 54 #include <stdint.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 #include <libutil.h> 60 61 #include "extern.h" 62 #include "mntopts.h" 63 #include "pathnames.h" 64 65 /* `meta' options */ 66 #define MOUNT_META_OPTION_FSTAB "fstab" 67 #define MOUNT_META_OPTION_CURRENT "current" 68 69 int debug, fstab_style, verbose; 70 71 struct cpa { 72 char **a; 73 ssize_t sz; 74 int c; 75 }; 76 77 char *catopt(char *, const char *); 78 struct statfs *getmntpt(const char *); 79 int hasopt(const char *, const char *); 80 int ismounted(struct fstab *, struct statfs *, int); 81 int isremountable(const char *); 82 void mangle(char *, struct cpa *); 83 char *update_options(char *, char *, int); 84 int mountfs(const char *, const char *, const char *, 85 int, const char *, const char *); 86 void remopt(char *, const char *); 87 void prmount(struct statfs *); 88 void putfsent(struct statfs *); 89 void usage(void); 90 char *flags2opts(int); 91 92 /* Map from mount options to printable formats. */ 93 static struct opt { 94 int o_opt; 95 const char *o_name; 96 } optnames[] = { 97 { MNT_ASYNC, "asynchronous" }, 98 { MNT_EXPORTED, "NFS exported" }, 99 { MNT_LOCAL, "local" }, 100 { MNT_NOATIME, "noatime" }, 101 { MNT_NOEXEC, "noexec" }, 102 { MNT_NOSUID, "nosuid" }, 103 { MNT_NOSYMFOLLOW, "nosymfollow" }, 104 { MNT_QUOTA, "with quotas" }, 105 { MNT_RDONLY, "read-only" }, 106 { MNT_SYNCHRONOUS, "synchronous" }, 107 { MNT_UNION, "union" }, 108 { MNT_NOCLUSTERR, "noclusterr" }, 109 { MNT_NOCLUSTERW, "noclusterw" }, 110 { MNT_SUIDDIR, "suiddir" }, 111 { MNT_SOFTDEP, "soft-updates" }, 112 { MNT_MULTILABEL, "multilabel" }, 113 { MNT_ACLS, "acls" }, 114 { MNT_GJOURNAL, "gjournal" }, 115 { 0, NULL } 116 }; 117 118 /* 119 * List of VFS types that can be remounted without becoming mounted on top 120 * of each other. 121 * XXX Is this list correct? 122 */ 123 static const char * 124 remountable_fs_names[] = { 125 "ufs", "ffs", "ext2fs", 126 0 127 }; 128 129 static const char userquotaeq[] = "userquota="; 130 static const char groupquotaeq[] = "groupquota="; 131 132 static int 133 use_mountprog(const char *vfstype) 134 { 135 /* XXX: We need to get away from implementing external mount 136 * programs for every filesystem, and move towards having 137 * each filesystem properly implement the nmount() system call. 138 */ 139 unsigned int i; 140 const char *fs[] = { 141 "cd9660", "mfs", "msdosfs", "nfs", "nfs4", "ntfs", 142 "nwfs", "nullfs", "portalfs", "smbfs", "udf", "unionfs", 143 NULL 144 }; 145 146 for (i = 0; fs[i] != NULL; ++i) { 147 if (strcmp(vfstype, fs[i]) == 0) 148 return (1); 149 } 150 151 return (0); 152 } 153 154 static int 155 exec_mountprog(const char *name, const char *execname, char *const argv[]) 156 { 157 pid_t pid; 158 int status; 159 160 switch (pid = fork()) { 161 case -1: /* Error. */ 162 warn("fork"); 163 exit (1); 164 case 0: /* Child. */ 165 /* Go find an executable. */ 166 execvP(execname, _PATH_SYSPATH, argv); 167 if (errno == ENOENT) { 168 warn("exec %s not found in %s", execname, 169 _PATH_SYSPATH); 170 } 171 exit(1); 172 default: /* Parent. */ 173 if (waitpid(pid, &status, 0) < 0) { 174 warn("waitpid"); 175 return (1); 176 } 177 178 if (WIFEXITED(status)) { 179 if (WEXITSTATUS(status) != 0) 180 return (WEXITSTATUS(status)); 181 } else if (WIFSIGNALED(status)) { 182 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 183 return (1); 184 } 185 break; 186 } 187 188 return (0); 189 } 190 191 static int 192 specified_ro(const char *arg) 193 { 194 char *optbuf, *opt; 195 int ret = 0; 196 197 optbuf = strdup(arg); 198 if (optbuf == NULL) 199 err(1, NULL); 200 201 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 202 if (strcmp(opt, "ro") == 0) { 203 ret = 1; 204 break; 205 } 206 } 207 free(optbuf); 208 return (ret); 209 } 210 211 static void 212 restart_mountd(void) 213 { 214 struct pidfh *pfh; 215 pid_t mountdpid; 216 217 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid); 218 if (pfh != NULL) { 219 /* Mountd is not running. */ 220 pidfile_remove(pfh); 221 return; 222 } 223 if (errno != EEXIST) { 224 /* Cannot open pidfile for some reason. */ 225 return; 226 } 227 /* We have mountd(8) PID in mountdpid varible, let's signal it. */ 228 if (kill(mountdpid, SIGHUP) == -1) 229 err(1, "signal mountd"); 230 } 231 232 int 233 main(int argc, char *argv[]) 234 { 235 const char *mntfromname, **vfslist, *vfstype; 236 struct fstab *fs; 237 struct statfs *mntbuf; 238 int all, ch, i, init_flags, late, mntsize, rval, have_fstab, ro; 239 char *cp, *ep, *options; 240 241 all = init_flags = late = 0; 242 ro = 0; 243 options = NULL; 244 vfslist = NULL; 245 vfstype = "ufs"; 246 while ((ch = getopt(argc, argv, "adF:flo:prt:uvw")) != -1) 247 switch (ch) { 248 case 'a': 249 all = 1; 250 break; 251 case 'd': 252 debug = 1; 253 break; 254 case 'F': 255 setfstab(optarg); 256 break; 257 case 'f': 258 init_flags |= MNT_FORCE; 259 break; 260 case 'l': 261 late = 1; 262 break; 263 case 'o': 264 if (*optarg) { 265 options = catopt(options, optarg); 266 if (specified_ro(optarg)) 267 ro = 1; 268 } 269 break; 270 case 'p': 271 fstab_style = 1; 272 verbose = 1; 273 break; 274 case 'r': 275 options = catopt(options, "ro"); 276 ro = 1; 277 break; 278 case 't': 279 if (vfslist != NULL) 280 errx(1, "only one -t option may be specified"); 281 vfslist = makevfslist(optarg); 282 vfstype = optarg; 283 break; 284 case 'u': 285 init_flags |= MNT_UPDATE; 286 break; 287 case 'v': 288 verbose = 1; 289 break; 290 case 'w': 291 options = catopt(options, "noro"); 292 break; 293 case '?': 294 default: 295 usage(); 296 /* NOTREACHED */ 297 } 298 argc -= optind; 299 argv += optind; 300 301 #define BADTYPE(type) \ 302 (strcmp(type, FSTAB_RO) && \ 303 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 304 305 if ((init_flags & MNT_UPDATE) && (ro == 0)) 306 options = catopt(options, "noro"); 307 308 rval = 0; 309 switch (argc) { 310 case 0: 311 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 312 err(1, "getmntinfo"); 313 if (all) { 314 while ((fs = getfsent()) != NULL) { 315 if (BADTYPE(fs->fs_type)) 316 continue; 317 if (checkvfsname(fs->fs_vfstype, vfslist)) 318 continue; 319 if (hasopt(fs->fs_mntops, "noauto")) 320 continue; 321 if (hasopt(fs->fs_mntops, "late") && !late) 322 continue; 323 if (!(init_flags & MNT_UPDATE) && 324 ismounted(fs, mntbuf, mntsize)) 325 continue; 326 options = update_options(options, fs->fs_mntops, 327 mntbuf->f_flags); 328 if (mountfs(fs->fs_vfstype, fs->fs_spec, 329 fs->fs_file, init_flags, options, 330 fs->fs_mntops)) 331 rval = 1; 332 } 333 } else if (fstab_style) { 334 for (i = 0; i < mntsize; i++) { 335 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 336 continue; 337 putfsent(&mntbuf[i]); 338 } 339 } else { 340 for (i = 0; i < mntsize; i++) { 341 if (checkvfsname(mntbuf[i].f_fstypename, 342 vfslist)) 343 continue; 344 prmount(&mntbuf[i]); 345 } 346 } 347 exit(rval); 348 case 1: 349 if (vfslist != NULL) 350 usage(); 351 352 rmslashes(*argv, *argv); 353 if (init_flags & MNT_UPDATE) { 354 mntfromname = NULL; 355 have_fstab = 0; 356 if ((mntbuf = getmntpt(*argv)) == NULL) 357 errx(1, "not currently mounted %s", *argv); 358 /* 359 * Only get the mntflags from fstab if both mntpoint 360 * and mntspec are identical. Also handle the special 361 * case where just '/' is mounted and 'spec' is not 362 * identical with the one from fstab ('/dev' is missing 363 * in the spec-string at boot-time). 364 */ 365 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 366 if (strcmp(fs->fs_spec, 367 mntbuf->f_mntfromname) == 0 && 368 strcmp(fs->fs_file, 369 mntbuf->f_mntonname) == 0) { 370 have_fstab = 1; 371 mntfromname = mntbuf->f_mntfromname; 372 } else if (argv[0][0] == '/' && 373 argv[0][1] == '\0') { 374 fs = getfsfile("/"); 375 have_fstab = 1; 376 mntfromname = fs->fs_spec; 377 } 378 } 379 if (have_fstab) { 380 options = update_options(options, fs->fs_mntops, 381 mntbuf->f_flags); 382 } else { 383 mntfromname = mntbuf->f_mntfromname; 384 options = update_options(options, NULL, 385 mntbuf->f_flags); 386 } 387 rval = mountfs(mntbuf->f_fstypename, mntfromname, 388 mntbuf->f_mntonname, init_flags, options, 0); 389 break; 390 } 391 if ((fs = getfsfile(*argv)) == NULL && 392 (fs = getfsspec(*argv)) == NULL) 393 errx(1, "%s: unknown special file or file system", 394 *argv); 395 if (BADTYPE(fs->fs_type)) 396 errx(1, "%s has unknown file system type", 397 *argv); 398 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 399 init_flags, options, fs->fs_mntops); 400 break; 401 case 2: 402 /* 403 * If -t flag has not been specified, the path cannot be 404 * found, spec contains either a ':' or a '@', then assume 405 * that an NFS file system is being specified ala Sun. 406 * Check if the hostname contains only allowed characters 407 * to reduce false positives. IPv6 addresses containing 408 * ':' will be correctly parsed only if the separator is '@'. 409 * The definition of a valid hostname is taken from RFC 1034. 410 */ 411 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 412 (ep = strchr(argv[0], ':')) != NULL)) { 413 if (*ep == '@') { 414 cp = ep + 1; 415 ep = cp + strlen(cp); 416 } else 417 cp = argv[0]; 418 while (cp != ep) { 419 if (!isdigit(*cp) && !isalpha(*cp) && 420 *cp != '.' && *cp != '-' && *cp != ':') 421 break; 422 cp++; 423 } 424 if (cp == ep) 425 vfstype = "nfs"; 426 } 427 rval = mountfs(vfstype, 428 argv[0], argv[1], init_flags, options, NULL); 429 break; 430 default: 431 usage(); 432 /* NOTREACHED */ 433 } 434 435 /* 436 * If the mount was successfully, and done by root, tell mountd the 437 * good news. 438 */ 439 if (rval == 0 && getuid() == 0) 440 restart_mountd(); 441 442 exit(rval); 443 } 444 445 int 446 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 447 { 448 char realfsfile[PATH_MAX]; 449 int i; 450 451 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 452 /* the root file system can always be remounted */ 453 return (0); 454 455 /* The user may have specified a symlink in fstab, resolve the path */ 456 if (realpath(fs->fs_file, realfsfile) == NULL) { 457 /* Cannot resolve the path, use original one */ 458 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 459 } 460 461 for (i = mntsize - 1; i >= 0; --i) 462 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 463 (!isremountable(fs->fs_vfstype) || 464 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 465 return (1); 466 return (0); 467 } 468 469 int 470 isremountable(const char *vfsname) 471 { 472 const char **cp; 473 474 for (cp = remountable_fs_names; *cp; cp++) 475 if (strcmp(*cp, vfsname) == 0) 476 return (1); 477 return (0); 478 } 479 480 int 481 hasopt(const char *mntopts, const char *option) 482 { 483 int negative, found; 484 char *opt, *optbuf; 485 486 if (option[0] == 'n' && option[1] == 'o') { 487 negative = 1; 488 option += 2; 489 } else 490 negative = 0; 491 optbuf = strdup(mntopts); 492 found = 0; 493 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 494 if (opt[0] == 'n' && opt[1] == 'o') { 495 if (!strcasecmp(opt + 2, option)) 496 found = negative; 497 } else if (!strcasecmp(opt, option)) 498 found = !negative; 499 } 500 free(optbuf); 501 return (found); 502 } 503 504 static void 505 append_arg(struct cpa *sa, char *arg) 506 { 507 if (sa->c + 1 == sa->sz) { 508 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2; 509 sa->a = realloc(sa->a, sizeof(sa->a) * sa->sz); 510 if (sa->a == NULL) 511 errx(1, "realloc failed"); 512 } 513 sa->a[++sa->c] = arg; 514 } 515 516 int 517 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 518 const char *options, const char *mntopts) 519 { 520 struct statfs sf; 521 int i, ret; 522 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 523 static struct cpa mnt_argv; 524 525 /* resolve the mountpoint with realpath(3) */ 526 (void)checkpath(name, mntpath); 527 name = mntpath; 528 529 if (mntopts == NULL) 530 mntopts = ""; 531 optbuf = catopt(strdup(mntopts), options); 532 533 if (strcmp(name, "/") == 0) 534 flags |= MNT_UPDATE; 535 if (flags & MNT_FORCE) 536 optbuf = catopt(optbuf, "force"); 537 if (flags & MNT_RDONLY) 538 optbuf = catopt(optbuf, "ro"); 539 /* 540 * XXX 541 * The mount_mfs (newfs) command uses -o to select the 542 * optimization mode. We don't pass the default "-o rw" 543 * for that reason. 544 */ 545 if (flags & MNT_UPDATE) 546 optbuf = catopt(optbuf, "update"); 547 548 /* Compatibility glue. */ 549 if (strcmp(vfstype, "msdos") == 0) { 550 warnx( 551 "Using \"-t msdosfs\", since \"-t msdos\" is deprecated."); 552 vfstype = "msdosfs"; 553 } 554 555 /* Construct the name of the appropriate mount command */ 556 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 557 558 mnt_argv.c = -1; 559 append_arg(&mnt_argv, execname); 560 mangle(optbuf, &mnt_argv); 561 append_arg(&mnt_argv, strdup(spec)); 562 append_arg(&mnt_argv, strdup(name)); 563 append_arg(&mnt_argv, NULL); 564 565 if (debug) { 566 if (use_mountprog(vfstype)) 567 printf("exec: mount_%s", vfstype); 568 else 569 printf("mount -t %s", vfstype); 570 for (i = 1; i < mnt_argv.c; i++) 571 (void)printf(" %s", mnt_argv.a[i]); 572 (void)printf("\n"); 573 return (0); 574 } 575 576 if (use_mountprog(vfstype)) { 577 ret = exec_mountprog(name, execname, mnt_argv.a); 578 } else { 579 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a); 580 } 581 582 free(optbuf); 583 584 if (verbose) { 585 if (statfs(name, &sf) < 0) { 586 warn("statfs %s", name); 587 return (1); 588 } 589 if (fstab_style) 590 putfsent(&sf); 591 else 592 prmount(&sf); 593 } 594 595 return (ret); 596 } 597 598 void 599 prmount(struct statfs *sfp) 600 { 601 int flags; 602 unsigned int i; 603 struct opt *o; 604 struct passwd *pw; 605 606 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 607 sfp->f_fstypename); 608 609 flags = sfp->f_flags & MNT_VISFLAGMASK; 610 for (o = optnames; flags && o->o_opt; o++) 611 if (flags & o->o_opt) { 612 (void)printf(", %s", o->o_name); 613 flags &= ~o->o_opt; 614 } 615 /* 616 * Inform when file system is mounted by an unprivileged user 617 * or privileged non-root user. 618 */ 619 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 620 (void)printf(", mounted by "); 621 if ((pw = getpwuid(sfp->f_owner)) != NULL) 622 (void)printf("%s", pw->pw_name); 623 else 624 (void)printf("%d", sfp->f_owner); 625 } 626 if (verbose) { 627 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 628 (void)printf(", writes: sync %ju async %ju", 629 (uintmax_t)sfp->f_syncwrites, 630 (uintmax_t)sfp->f_asyncwrites); 631 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 632 (void)printf(", reads: sync %ju async %ju", 633 (uintmax_t)sfp->f_syncreads, 634 (uintmax_t)sfp->f_asyncreads); 635 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 636 printf(", fsid "); 637 for (i = 0; i < sizeof(sfp->f_fsid); i++) 638 printf("%02x", ((u_char *)&sfp->f_fsid)[i]); 639 } 640 } 641 (void)printf(")\n"); 642 } 643 644 struct statfs * 645 getmntpt(const char *name) 646 { 647 struct statfs *mntbuf; 648 int i, mntsize; 649 650 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 651 for (i = mntsize - 1; i >= 0; i--) { 652 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 653 strcmp(mntbuf[i].f_mntonname, name) == 0) 654 return (&mntbuf[i]); 655 } 656 return (NULL); 657 } 658 659 char * 660 catopt(char *s0, const char *s1) 661 { 662 size_t i; 663 char *cp; 664 665 if (s1 == NULL || *s1 == '\0') 666 return (s0); 667 668 if (s0 && *s0) { 669 i = strlen(s0) + strlen(s1) + 1 + 1; 670 if ((cp = malloc(i)) == NULL) 671 errx(1, "malloc failed"); 672 (void)snprintf(cp, i, "%s,%s", s0, s1); 673 } else 674 cp = strdup(s1); 675 676 if (s0) 677 free(s0); 678 return (cp); 679 } 680 681 void 682 mangle(char *options, struct cpa *a) 683 { 684 char *p, *s; 685 686 for (s = options; (p = strsep(&s, ",")) != NULL;) 687 if (*p != '\0') { 688 if (strcmp(p, "noauto") == 0) { 689 /* 690 * Do not pass noauto option to nmount(). 691 * or external mount program. noauto is 692 * only used to prevent mounting a filesystem 693 * when 'mount -a' is specified, and is 694 * not a real mount option. 695 */ 696 continue; 697 } else if (strcmp(p, "late") == 0) { 698 /* 699 * "late" is used to prevent certain file 700 * systems from being mounted before late 701 * in the boot cycle; for instance, 702 * loopback NFS mounts can't be mounted 703 * before mountd starts. 704 */ 705 continue; 706 } else if (strcmp(p, "userquota") == 0) { 707 continue; 708 } else if (strncmp(p, userquotaeq, 709 sizeof(userquotaeq) - 1) == 0) { 710 continue; 711 } else if (strcmp(p, "groupquota") == 0) { 712 continue; 713 } else if (strncmp(p, groupquotaeq, 714 sizeof(groupquotaeq) - 1) == 0) { 715 continue; 716 } else if (*p == '-') { 717 append_arg(a, p); 718 p = strchr(p, '='); 719 if (p != NULL) { 720 *p = '\0'; 721 append_arg(a, p + 1); 722 } 723 } else { 724 append_arg(a, strdup("-o")); 725 append_arg(a, p); 726 } 727 } 728 } 729 730 731 char * 732 update_options(char *opts, char *fstab, int curflags) 733 { 734 char *o, *p; 735 char *cur; 736 char *expopt, *newopt, *tmpopt; 737 738 if (opts == NULL) 739 return (strdup("")); 740 741 /* remove meta options from list */ 742 remopt(fstab, MOUNT_META_OPTION_FSTAB); 743 remopt(fstab, MOUNT_META_OPTION_CURRENT); 744 cur = flags2opts(curflags); 745 746 /* 747 * Expand all meta-options passed to us first. 748 */ 749 expopt = NULL; 750 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 751 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 752 expopt = catopt(expopt, fstab); 753 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 754 expopt = catopt(expopt, cur); 755 else 756 expopt = catopt(expopt, o); 757 } 758 free(cur); 759 free(opts); 760 761 /* 762 * Remove previous contradictory arguments. Given option "foo" we 763 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 764 * and "foo" - so we can deal with possible options like "notice". 765 */ 766 newopt = NULL; 767 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 768 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 769 errx(1, "malloc failed"); 770 771 strcpy(tmpopt, "no"); 772 strcat(tmpopt, o); 773 remopt(newopt, tmpopt); 774 free(tmpopt); 775 776 if (strncmp("no", o, 2) == 0) 777 remopt(newopt, o+2); 778 779 newopt = catopt(newopt, o); 780 } 781 free(expopt); 782 783 return (newopt); 784 } 785 786 void 787 remopt(char *string, const char *opt) 788 { 789 char *o, *p, *r; 790 791 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 792 return; 793 794 r = string; 795 796 for (p = string; (o = strsep(&p, ",")) != NULL;) { 797 if (strcmp(opt, o) != 0) { 798 if (*r == ',' && *o != '\0') 799 r++; 800 while ((*r++ = *o++) != '\0') 801 ; 802 *--r = ','; 803 } 804 } 805 *r = '\0'; 806 } 807 808 void 809 usage(void) 810 { 811 812 (void)fprintf(stderr, "%s\n%s\n%s\n", 813 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 814 " mount [-dfpruvw] special | node", 815 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 816 exit(1); 817 } 818 819 void 820 putfsent(struct statfs *ent) 821 { 822 struct fstab *fst; 823 char *opts; 824 int l; 825 826 opts = flags2opts(ent->f_flags); 827 828 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 || 829 strncmp(ent->f_mntfromname, "<above>", 7) == 0) { 830 strcpy(ent->f_mntfromname, (strnstr(ent->f_mntfromname, ":", 8) 831 +1)); 832 } 833 834 /* 835 * "rw" is not a real mount option; this is why we print NULL as "rw" 836 * if opts is still NULL here. 837 */ 838 l = strlen(ent->f_mntfromname); 839 printf("%s%s%s%s", ent->f_mntfromname, 840 l < 8 ? "\t" : "", 841 l < 16 ? "\t" : "", 842 l < 24 ? "\t" : " "); 843 l = strlen(ent->f_mntonname); 844 printf("%s%s%s%s", ent->f_mntonname, 845 l < 8 ? "\t" : "", 846 l < 16 ? "\t" : "", 847 l < 24 ? "\t" : " "); 848 printf("%s\t", ent->f_fstypename); 849 if (opts == NULL) { 850 printf("%s\t", "rw"); 851 } else { 852 l = strlen(opts); 853 printf("%s%s", opts, 854 l < 8 ? "\t" : " "); 855 } 856 free(opts); 857 858 if ((fst = getfsspec(ent->f_mntfromname))) 859 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 860 else if ((fst = getfsfile(ent->f_mntonname))) 861 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 862 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 863 if (strcmp(ent->f_mntonname, "/") == 0) 864 printf("\t1 1\n"); 865 else 866 printf("\t2 2\n"); 867 } else 868 printf("\t0 0\n"); 869 } 870 871 872 char * 873 flags2opts(int flags) 874 { 875 char *res; 876 877 res = NULL; 878 879 if (flags & MNT_RDONLY) res = catopt(res, "ro"); 880 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 881 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 882 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 883 if (flags & MNT_UNION) res = catopt(res, "union"); 884 if (flags & MNT_ASYNC) res = catopt(res, "async"); 885 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 886 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 887 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 888 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 889 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 890 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 891 if (flags & MNT_ACLS) res = catopt(res, "acls"); 892 893 return (res); 894 } 895