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 uint64_t 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_NFS4ACLS, "nfsv4acls" }, 115 { MNT_GJOURNAL, "gjournal" }, 116 { 0, NULL } 117 }; 118 119 /* 120 * List of VFS types that can be remounted without becoming mounted on top 121 * of each other. 122 * XXX Is this list correct? 123 */ 124 static const char * 125 remountable_fs_names[] = { 126 "ufs", "ffs", "ext2fs", 127 0 128 }; 129 130 static const char userquotaeq[] = "userquota="; 131 static const char groupquotaeq[] = "groupquota="; 132 133 static char *mountprog = NULL; 134 135 static int 136 use_mountprog(const char *vfstype) 137 { 138 /* XXX: We need to get away from implementing external mount 139 * programs for every filesystem, and move towards having 140 * each filesystem properly implement the nmount() system call. 141 */ 142 unsigned int i; 143 const char *fs[] = { 144 "cd9660", "mfs", "msdosfs", "newnfs", "nfs", "ntfs", 145 "nwfs", "nullfs", "portalfs", "smbfs", "udf", "unionfs", 146 NULL 147 }; 148 149 if (mountprog != NULL) 150 return (1); 151 152 for (i = 0; fs[i] != NULL; ++i) { 153 if (strcmp(vfstype, fs[i]) == 0) 154 return (1); 155 } 156 157 return (0); 158 } 159 160 static int 161 exec_mountprog(const char *name, const char *execname, char *const argv[]) 162 { 163 pid_t pid; 164 int status; 165 166 switch (pid = fork()) { 167 case -1: /* Error. */ 168 warn("fork"); 169 exit (1); 170 case 0: /* Child. */ 171 /* Go find an executable. */ 172 execvP(execname, _PATH_SYSPATH, argv); 173 if (errno == ENOENT) { 174 warn("exec %s not found", execname); 175 if (execname[0] != '/') { 176 warnx("in path: %s", _PATH_SYSPATH); 177 } 178 } 179 exit(1); 180 default: /* Parent. */ 181 if (waitpid(pid, &status, 0) < 0) { 182 warn("waitpid"); 183 return (1); 184 } 185 186 if (WIFEXITED(status)) { 187 if (WEXITSTATUS(status) != 0) 188 return (WEXITSTATUS(status)); 189 } else if (WIFSIGNALED(status)) { 190 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 191 return (1); 192 } 193 break; 194 } 195 196 return (0); 197 } 198 199 static int 200 specified_ro(const char *arg) 201 { 202 char *optbuf, *opt; 203 int ret = 0; 204 205 optbuf = strdup(arg); 206 if (optbuf == NULL) 207 err(1, NULL); 208 209 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 210 if (strcmp(opt, "ro") == 0) { 211 ret = 1; 212 break; 213 } 214 } 215 free(optbuf); 216 return (ret); 217 } 218 219 static void 220 restart_mountd(void) 221 { 222 struct pidfh *pfh; 223 pid_t mountdpid; 224 225 pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid); 226 if (pfh != NULL) { 227 /* Mountd is not running. */ 228 pidfile_remove(pfh); 229 return; 230 } 231 if (errno != EEXIST) { 232 /* Cannot open pidfile for some reason. */ 233 return; 234 } 235 /* We have mountd(8) PID in mountdpid varible, let's signal it. */ 236 if (kill(mountdpid, SIGHUP) == -1) 237 err(1, "signal mountd"); 238 } 239 240 int 241 main(int argc, char *argv[]) 242 { 243 const char *mntfromname, **vfslist, *vfstype; 244 struct fstab *fs; 245 struct statfs *mntbuf; 246 int all, ch, i, init_flags, late, mntsize, rval, have_fstab, ro; 247 char *cp, *ep, *options; 248 249 all = init_flags = late = 0; 250 ro = 0; 251 options = NULL; 252 vfslist = NULL; 253 vfstype = "ufs"; 254 while ((ch = getopt(argc, argv, "adF:flo:prt:uvw")) != -1) 255 switch (ch) { 256 case 'a': 257 all = 1; 258 break; 259 case 'd': 260 debug = 1; 261 break; 262 case 'F': 263 setfstab(optarg); 264 break; 265 case 'f': 266 init_flags |= MNT_FORCE; 267 break; 268 case 'l': 269 late = 1; 270 break; 271 case 'o': 272 if (*optarg) { 273 options = catopt(options, optarg); 274 if (specified_ro(optarg)) 275 ro = 1; 276 } 277 break; 278 case 'p': 279 fstab_style = 1; 280 verbose = 1; 281 break; 282 case 'r': 283 options = catopt(options, "ro"); 284 ro = 1; 285 break; 286 case 't': 287 if (vfslist != NULL) 288 errx(1, "only one -t option may be specified"); 289 vfslist = makevfslist(optarg); 290 vfstype = optarg; 291 break; 292 case 'u': 293 init_flags |= MNT_UPDATE; 294 break; 295 case 'v': 296 verbose = 1; 297 break; 298 case 'w': 299 options = catopt(options, "noro"); 300 break; 301 case '?': 302 default: 303 usage(); 304 /* NOTREACHED */ 305 } 306 argc -= optind; 307 argv += optind; 308 309 #define BADTYPE(type) \ 310 (strcmp(type, FSTAB_RO) && \ 311 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 312 313 if ((init_flags & MNT_UPDATE) && (ro == 0)) 314 options = catopt(options, "noro"); 315 316 rval = 0; 317 switch (argc) { 318 case 0: 319 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 320 err(1, "getmntinfo"); 321 if (all) { 322 while ((fs = getfsent()) != NULL) { 323 if (BADTYPE(fs->fs_type)) 324 continue; 325 if (checkvfsname(fs->fs_vfstype, vfslist)) 326 continue; 327 if (hasopt(fs->fs_mntops, "noauto")) 328 continue; 329 if (hasopt(fs->fs_mntops, "late") && !late) 330 continue; 331 if (!(init_flags & MNT_UPDATE) && 332 ismounted(fs, mntbuf, mntsize)) 333 continue; 334 options = update_options(options, fs->fs_mntops, 335 mntbuf->f_flags); 336 if (mountfs(fs->fs_vfstype, fs->fs_spec, 337 fs->fs_file, init_flags, options, 338 fs->fs_mntops)) 339 rval = 1; 340 } 341 } else if (fstab_style) { 342 for (i = 0; i < mntsize; i++) { 343 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 344 continue; 345 putfsent(&mntbuf[i]); 346 } 347 } else { 348 for (i = 0; i < mntsize; i++) { 349 if (checkvfsname(mntbuf[i].f_fstypename, 350 vfslist)) 351 continue; 352 if (!verbose && 353 (mntbuf[i].f_flags & MNT_IGNORE) != 0) 354 continue; 355 prmount(&mntbuf[i]); 356 } 357 } 358 exit(rval); 359 case 1: 360 if (vfslist != NULL) 361 usage(); 362 363 rmslashes(*argv, *argv); 364 if (init_flags & MNT_UPDATE) { 365 mntfromname = NULL; 366 have_fstab = 0; 367 if ((mntbuf = getmntpt(*argv)) == NULL) 368 errx(1, "not currently mounted %s", *argv); 369 /* 370 * Only get the mntflags from fstab if both mntpoint 371 * and mntspec are identical. Also handle the special 372 * case where just '/' is mounted and 'spec' is not 373 * identical with the one from fstab ('/dev' is missing 374 * in the spec-string at boot-time). 375 */ 376 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 377 if (strcmp(fs->fs_spec, 378 mntbuf->f_mntfromname) == 0 && 379 strcmp(fs->fs_file, 380 mntbuf->f_mntonname) == 0) { 381 have_fstab = 1; 382 mntfromname = mntbuf->f_mntfromname; 383 } else if (argv[0][0] == '/' && 384 argv[0][1] == '\0') { 385 fs = getfsfile("/"); 386 have_fstab = 1; 387 mntfromname = fs->fs_spec; 388 } 389 } 390 if (have_fstab) { 391 options = update_options(options, fs->fs_mntops, 392 mntbuf->f_flags); 393 } else { 394 mntfromname = mntbuf->f_mntfromname; 395 options = update_options(options, NULL, 396 mntbuf->f_flags); 397 } 398 rval = mountfs(mntbuf->f_fstypename, mntfromname, 399 mntbuf->f_mntonname, init_flags, options, 0); 400 break; 401 } 402 if ((fs = getfsfile(*argv)) == NULL && 403 (fs = getfsspec(*argv)) == NULL) 404 errx(1, "%s: unknown special file or file system", 405 *argv); 406 if (BADTYPE(fs->fs_type)) 407 errx(1, "%s has unknown file system type", 408 *argv); 409 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 410 init_flags, options, fs->fs_mntops); 411 break; 412 case 2: 413 /* 414 * If -t flag has not been specified, the path cannot be 415 * found, spec contains either a ':' or a '@', then assume 416 * that an NFS file system is being specified ala Sun. 417 * Check if the hostname contains only allowed characters 418 * to reduce false positives. IPv6 addresses containing 419 * ':' will be correctly parsed only if the separator is '@'. 420 * The definition of a valid hostname is taken from RFC 1034. 421 */ 422 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 423 (ep = strchr(argv[0], ':')) != NULL)) { 424 if (*ep == '@') { 425 cp = ep + 1; 426 ep = cp + strlen(cp); 427 } else 428 cp = argv[0]; 429 while (cp != ep) { 430 if (!isdigit(*cp) && !isalpha(*cp) && 431 *cp != '.' && *cp != '-' && *cp != ':') 432 break; 433 cp++; 434 } 435 if (cp == ep) 436 vfstype = "nfs"; 437 } 438 rval = mountfs(vfstype, 439 argv[0], argv[1], init_flags, options, NULL); 440 break; 441 default: 442 usage(); 443 /* NOTREACHED */ 444 } 445 446 /* 447 * If the mount was successfully, and done by root, tell mountd the 448 * good news. 449 */ 450 if (rval == 0 && getuid() == 0) 451 restart_mountd(); 452 453 exit(rval); 454 } 455 456 int 457 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 458 { 459 char realfsfile[PATH_MAX]; 460 int i; 461 462 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 463 /* the root file system can always be remounted */ 464 return (0); 465 466 /* The user may have specified a symlink in fstab, resolve the path */ 467 if (realpath(fs->fs_file, realfsfile) == NULL) { 468 /* Cannot resolve the path, use original one */ 469 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 470 } 471 472 for (i = mntsize - 1; i >= 0; --i) 473 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 474 (!isremountable(fs->fs_vfstype) || 475 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 476 return (1); 477 return (0); 478 } 479 480 int 481 isremountable(const char *vfsname) 482 { 483 const char **cp; 484 485 for (cp = remountable_fs_names; *cp; cp++) 486 if (strcmp(*cp, vfsname) == 0) 487 return (1); 488 return (0); 489 } 490 491 int 492 hasopt(const char *mntopts, const char *option) 493 { 494 int negative, found; 495 char *opt, *optbuf; 496 497 if (option[0] == 'n' && option[1] == 'o') { 498 negative = 1; 499 option += 2; 500 } else 501 negative = 0; 502 optbuf = strdup(mntopts); 503 found = 0; 504 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 505 if (opt[0] == 'n' && opt[1] == 'o') { 506 if (!strcasecmp(opt + 2, option)) 507 found = negative; 508 } else if (!strcasecmp(opt, option)) 509 found = !negative; 510 } 511 free(optbuf); 512 return (found); 513 } 514 515 static void 516 append_arg(struct cpa *sa, char *arg) 517 { 518 if (sa->c + 1 == sa->sz) { 519 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2; 520 sa->a = realloc(sa->a, sizeof(sa->a) * sa->sz); 521 if (sa->a == NULL) 522 errx(1, "realloc failed"); 523 } 524 sa->a[++sa->c] = arg; 525 } 526 527 int 528 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 529 const char *options, const char *mntopts) 530 { 531 struct statfs sf; 532 int i, ret; 533 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 534 static struct cpa mnt_argv; 535 536 /* resolve the mountpoint with realpath(3) */ 537 (void)checkpath(name, mntpath); 538 name = mntpath; 539 540 if (mntopts == NULL) 541 mntopts = ""; 542 optbuf = catopt(strdup(mntopts), options); 543 544 if (strcmp(name, "/") == 0) 545 flags |= MNT_UPDATE; 546 if (flags & MNT_FORCE) 547 optbuf = catopt(optbuf, "force"); 548 if (flags & MNT_RDONLY) 549 optbuf = catopt(optbuf, "ro"); 550 /* 551 * XXX 552 * The mount_mfs (newfs) command uses -o to select the 553 * optimization mode. We don't pass the default "-o rw" 554 * for that reason. 555 */ 556 if (flags & MNT_UPDATE) 557 optbuf = catopt(optbuf, "update"); 558 559 /* Compatibility glue. */ 560 if (strcmp(vfstype, "msdos") == 0) { 561 warnx( 562 "Using \"-t msdosfs\", since \"-t msdos\" is deprecated."); 563 vfstype = "msdosfs"; 564 } 565 566 /* Construct the name of the appropriate mount command */ 567 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 568 569 mnt_argv.c = -1; 570 append_arg(&mnt_argv, execname); 571 mangle(optbuf, &mnt_argv); 572 if (mountprog != NULL) 573 strcpy(execname, mountprog); 574 575 append_arg(&mnt_argv, strdup(spec)); 576 append_arg(&mnt_argv, strdup(name)); 577 append_arg(&mnt_argv, NULL); 578 579 if (debug) { 580 if (use_mountprog(vfstype)) 581 printf("exec: %s", execname); 582 else 583 printf("mount -t %s", vfstype); 584 for (i = 1; i < mnt_argv.c; i++) 585 (void)printf(" %s", mnt_argv.a[i]); 586 (void)printf("\n"); 587 return (0); 588 } 589 590 if (use_mountprog(vfstype)) { 591 ret = exec_mountprog(name, execname, mnt_argv.a); 592 } else { 593 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a); 594 } 595 596 free(optbuf); 597 598 if (verbose) { 599 if (statfs(name, &sf) < 0) { 600 warn("statfs %s", name); 601 return (1); 602 } 603 if (fstab_style) 604 putfsent(&sf); 605 else 606 prmount(&sf); 607 } 608 609 return (ret); 610 } 611 612 void 613 prmount(struct statfs *sfp) 614 { 615 uint64_t flags; 616 unsigned int i; 617 struct opt *o; 618 struct passwd *pw; 619 620 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 621 sfp->f_fstypename); 622 623 flags = sfp->f_flags & MNT_VISFLAGMASK; 624 for (o = optnames; flags != 0 && o->o_opt != 0; o++) 625 if (flags & o->o_opt) { 626 (void)printf(", %s", o->o_name); 627 flags &= ~o->o_opt; 628 } 629 /* 630 * Inform when file system is mounted by an unprivileged user 631 * or privileged non-root user. 632 */ 633 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 634 (void)printf(", mounted by "); 635 if ((pw = getpwuid(sfp->f_owner)) != NULL) 636 (void)printf("%s", pw->pw_name); 637 else 638 (void)printf("%d", sfp->f_owner); 639 } 640 if (verbose) { 641 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 642 (void)printf(", writes: sync %ju async %ju", 643 (uintmax_t)sfp->f_syncwrites, 644 (uintmax_t)sfp->f_asyncwrites); 645 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 646 (void)printf(", reads: sync %ju async %ju", 647 (uintmax_t)sfp->f_syncreads, 648 (uintmax_t)sfp->f_asyncreads); 649 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 650 printf(", fsid "); 651 for (i = 0; i < sizeof(sfp->f_fsid); i++) 652 printf("%02x", ((u_char *)&sfp->f_fsid)[i]); 653 } 654 } 655 (void)printf(")\n"); 656 } 657 658 struct statfs * 659 getmntpt(const char *name) 660 { 661 struct statfs *mntbuf; 662 int i, mntsize; 663 664 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 665 for (i = mntsize - 1; i >= 0; i--) { 666 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 667 strcmp(mntbuf[i].f_mntonname, name) == 0) 668 return (&mntbuf[i]); 669 } 670 return (NULL); 671 } 672 673 char * 674 catopt(char *s0, const char *s1) 675 { 676 size_t i; 677 char *cp; 678 679 if (s1 == NULL || *s1 == '\0') 680 return (s0); 681 682 if (s0 && *s0) { 683 i = strlen(s0) + strlen(s1) + 1 + 1; 684 if ((cp = malloc(i)) == NULL) 685 errx(1, "malloc failed"); 686 (void)snprintf(cp, i, "%s,%s", s0, s1); 687 } else 688 cp = strdup(s1); 689 690 if (s0) 691 free(s0); 692 return (cp); 693 } 694 695 void 696 mangle(char *options, struct cpa *a) 697 { 698 char *p, *s, *val; 699 700 for (s = options; (p = strsep(&s, ",")) != NULL;) 701 if (*p != '\0') { 702 if (strcmp(p, "noauto") == 0) { 703 /* 704 * Do not pass noauto option to nmount(). 705 * or external mount program. noauto is 706 * only used to prevent mounting a filesystem 707 * when 'mount -a' is specified, and is 708 * not a real mount option. 709 */ 710 continue; 711 } else if (strcmp(p, "late") == 0) { 712 /* 713 * "late" is used to prevent certain file 714 * systems from being mounted before late 715 * in the boot cycle; for instance, 716 * loopback NFS mounts can't be mounted 717 * before mountd starts. 718 */ 719 continue; 720 } else if (strncmp(p, "mountprog", 9) == 0) { 721 /* 722 * "mountprog" is used to force the use of 723 * userland mount programs. 724 */ 725 val = strchr(p, '='); 726 if (val != NULL) { 727 ++val; 728 if (*val != '\0') 729 mountprog = strdup(val); 730 } 731 732 if (mountprog == NULL) { 733 errx(1, "Need value for -o mountprog"); 734 } 735 continue; 736 } else if (strcmp(p, "userquota") == 0) { 737 continue; 738 } else if (strncmp(p, userquotaeq, 739 sizeof(userquotaeq) - 1) == 0) { 740 continue; 741 } else if (strcmp(p, "groupquota") == 0) { 742 continue; 743 } else if (strncmp(p, groupquotaeq, 744 sizeof(groupquotaeq) - 1) == 0) { 745 continue; 746 } else if (*p == '-') { 747 append_arg(a, p); 748 p = strchr(p, '='); 749 if (p != NULL) { 750 *p = '\0'; 751 append_arg(a, p + 1); 752 } 753 } else { 754 append_arg(a, strdup("-o")); 755 append_arg(a, p); 756 } 757 } 758 } 759 760 761 char * 762 update_options(char *opts, char *fstab, int curflags) 763 { 764 char *o, *p; 765 char *cur; 766 char *expopt, *newopt, *tmpopt; 767 768 if (opts == NULL) 769 return (strdup("")); 770 771 /* remove meta options from list */ 772 remopt(fstab, MOUNT_META_OPTION_FSTAB); 773 remopt(fstab, MOUNT_META_OPTION_CURRENT); 774 cur = flags2opts(curflags); 775 776 /* 777 * Expand all meta-options passed to us first. 778 */ 779 expopt = NULL; 780 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 781 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 782 expopt = catopt(expopt, fstab); 783 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 784 expopt = catopt(expopt, cur); 785 else 786 expopt = catopt(expopt, o); 787 } 788 free(cur); 789 free(opts); 790 791 /* 792 * Remove previous contradictory arguments. Given option "foo" we 793 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 794 * and "foo" - so we can deal with possible options like "notice". 795 */ 796 newopt = NULL; 797 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 798 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 799 errx(1, "malloc failed"); 800 801 strcpy(tmpopt, "no"); 802 strcat(tmpopt, o); 803 remopt(newopt, tmpopt); 804 free(tmpopt); 805 806 if (strncmp("no", o, 2) == 0) 807 remopt(newopt, o+2); 808 809 newopt = catopt(newopt, o); 810 } 811 free(expopt); 812 813 return (newopt); 814 } 815 816 void 817 remopt(char *string, const char *opt) 818 { 819 char *o, *p, *r; 820 821 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 822 return; 823 824 r = string; 825 826 for (p = string; (o = strsep(&p, ",")) != NULL;) { 827 if (strcmp(opt, o) != 0) { 828 if (*r == ',' && *o != '\0') 829 r++; 830 while ((*r++ = *o++) != '\0') 831 ; 832 *--r = ','; 833 } 834 } 835 *r = '\0'; 836 } 837 838 void 839 usage(void) 840 { 841 842 (void)fprintf(stderr, "%s\n%s\n%s\n", 843 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 844 " mount [-dfpruvw] special | node", 845 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 846 exit(1); 847 } 848 849 void 850 putfsent(struct statfs *ent) 851 { 852 struct fstab *fst; 853 char *opts; 854 int l; 855 856 opts = flags2opts(ent->f_flags); 857 858 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 || 859 strncmp(ent->f_mntfromname, "<above>", 7) == 0) { 860 strcpy(ent->f_mntfromname, (strnstr(ent->f_mntfromname, ":", 8) 861 +1)); 862 } 863 864 /* 865 * "rw" is not a real mount option; this is why we print NULL as "rw" 866 * if opts is still NULL here. 867 */ 868 l = strlen(ent->f_mntfromname); 869 printf("%s%s%s%s", ent->f_mntfromname, 870 l < 8 ? "\t" : "", 871 l < 16 ? "\t" : "", 872 l < 24 ? "\t" : " "); 873 l = strlen(ent->f_mntonname); 874 printf("%s%s%s%s", ent->f_mntonname, 875 l < 8 ? "\t" : "", 876 l < 16 ? "\t" : "", 877 l < 24 ? "\t" : " "); 878 printf("%s\t", ent->f_fstypename); 879 if (opts == NULL) { 880 printf("%s\t", "rw"); 881 } else { 882 l = strlen(opts); 883 printf("%s%s", opts, 884 l < 8 ? "\t" : " "); 885 } 886 free(opts); 887 888 if ((fst = getfsspec(ent->f_mntfromname))) 889 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 890 else if ((fst = getfsfile(ent->f_mntonname))) 891 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 892 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 893 if (strcmp(ent->f_mntonname, "/") == 0) 894 printf("\t1 1\n"); 895 else 896 printf("\t2 2\n"); 897 } else 898 printf("\t0 0\n"); 899 } 900 901 902 char * 903 flags2opts(int flags) 904 { 905 char *res; 906 907 res = NULL; 908 909 if (flags & MNT_RDONLY) res = catopt(res, "ro"); 910 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 911 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 912 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 913 if (flags & MNT_UNION) res = catopt(res, "union"); 914 if (flags & MNT_ASYNC) res = catopt(res, "async"); 915 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 916 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 917 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 918 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 919 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 920 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 921 if (flags & MNT_ACLS) res = catopt(res, "acls"); 922 if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls"); 923 924 return (res); 925 } 926