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