mount.c revision 159472
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 31static 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 38static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95"; 39#endif 40static const char rcsid[] = 41 "$FreeBSD: head/sbin/mount/mount.c 159472 2006-06-10 01:37:00Z jmallett $"; 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 70int debug, fstab_style, verbose; 71 72char *catopt(char *, const char *); 73struct statfs *getmntpt(const char *); 74int hasopt(const char *, const char *); 75int ismounted(struct fstab *, struct statfs *, int); 76int isremountable(const char *); 77void mangle(char *, int *, char **); 78char *update_options(char *, char *, int); 79int mountfs(const char *, const char *, const char *, 80 int, const char *, const char *); 81void remopt(char *, const char *); 82void prmount(struct statfs *); 83void putfsent(const struct statfs *); 84void usage(void); 85char *flags2opts(int); 86 87/* Map from mount options to printable formats. */ 88static 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 */ 117static const char * 118remountable_fs_names[] = { 119 "ufs", "ffs", "ext2fs", 120 0 121}; 122 123static const char userquotaeq[] = "userquota="; 124static const char groupquotaeq[] = "groupquota="; 125 126static int 127use_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 149static int 150exec_mountprog(const char *name, const char *execname, 151 char *const argv[]) 152{ 153 pid_t pid; 154 int status; 155 156 switch (pid = fork()) { 157 case -1: /* Error. */ 158 warn("fork"); 159 exit (1); 160 case 0: /* Child. */ 161 /* Go find an executable. */ 162 execvP(execname, _PATH_SYSPATH, argv); 163 if (errno == ENOENT) { 164 warn("exec %s not found in %s", execname, 165 _PATH_SYSPATH); 166 } 167 exit(1); 168 default: /* Parent. */ 169 if (waitpid(pid, &status, 0) < 0) { 170 warn("waitpid"); 171 return (1); 172 } 173 174 if (WIFEXITED(status)) { 175 if (WEXITSTATUS(status) != 0) 176 return (WEXITSTATUS(status)); 177 } else if (WIFSIGNALED(status)) { 178 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 179 return (1); 180 } 181 break; 182 } 183 184 return (0); 185} 186 187int 188main(int argc, char *argv[]) 189{ 190 const char *mntfromname, **vfslist, *vfstype; 191 struct fstab *fs; 192 struct statfs *mntbuf; 193 FILE *mountdfp; 194 pid_t pid; 195 int all, ch, i, init_flags, mntsize, rval, have_fstab; 196 char *cp, *ep, *options; 197 198 options = strdup("noro"); 199 if (options == NULL) 200 errx(1, "malloc failed"); 201 202 all = init_flags = 0; 203 vfslist = NULL; 204 vfstype = "ufs"; 205 while ((ch = getopt(argc, argv, "adF:fo:prwt:uv")) != -1) 206 switch (ch) { 207 case 'a': 208 all = 1; 209 break; 210 case 'd': 211 debug = 1; 212 break; 213 case 'F': 214 setfstab(optarg); 215 break; 216 case 'f': 217 init_flags |= MNT_FORCE; 218 break; 219 case 'o': 220 options = catopt(options, optarg); 221 break; 222 case 'p': 223 fstab_style = 1; 224 verbose = 1; 225 break; 226 case 'r': 227 options = catopt(options, "ro"); 228 break; 229 case 't': 230 if (vfslist != NULL) 231 errx(1, "only one -t option may be specified"); 232 vfslist = makevfslist(optarg); 233 vfstype = optarg; 234 break; 235 case 'u': 236 init_flags |= MNT_UPDATE; 237 break; 238 case 'v': 239 verbose = 1; 240 break; 241 case 'w': 242 options = catopt(options, "noro"); 243 break; 244 case '?': 245 default: 246 usage(); 247 /* NOTREACHED */ 248 } 249 argc -= optind; 250 argv += optind; 251 252#define BADTYPE(type) \ 253 (strcmp(type, FSTAB_RO) && \ 254 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 255 256 rval = 0; 257 switch (argc) { 258 case 0: 259 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 260 err(1, "getmntinfo"); 261 if (all) { 262 while ((fs = getfsent()) != NULL) { 263 if (BADTYPE(fs->fs_type)) 264 continue; 265 if (checkvfsname(fs->fs_vfstype, vfslist)) 266 continue; 267 if (hasopt(fs->fs_mntops, "noauto")) 268 continue; 269 if (!(init_flags & MNT_UPDATE) && 270 ismounted(fs, mntbuf, mntsize)) 271 continue; 272 options = update_options(options, fs->fs_mntops, 273 mntbuf->f_flags); 274 if (mountfs(fs->fs_vfstype, fs->fs_spec, 275 fs->fs_file, init_flags, options, 276 fs->fs_mntops)) 277 rval = 1; 278 } 279 } else if (fstab_style) { 280 for (i = 0; i < mntsize; i++) { 281 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 282 continue; 283 putfsent(&mntbuf[i]); 284 } 285 } else { 286 for (i = 0; i < mntsize; i++) { 287 if (checkvfsname(mntbuf[i].f_fstypename, 288 vfslist)) 289 continue; 290 prmount(&mntbuf[i]); 291 } 292 } 293 exit(rval); 294 case 1: 295 if (vfslist != NULL) 296 usage(); 297 298 rmslashes(*argv, *argv); 299 if (init_flags & MNT_UPDATE) { 300 mntfromname = NULL; 301 have_fstab = 0; 302 if ((mntbuf = getmntpt(*argv)) == NULL) 303 errx(1, "not currently mounted %s", *argv); 304 /* 305 * Only get the mntflags from fstab if both mntpoint 306 * and mntspec are identical. Also handle the special 307 * case where just '/' is mounted and 'spec' is not 308 * identical with the one from fstab ('/dev' is missing 309 * in the spec-string at boot-time). 310 */ 311 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 312 if (strcmp(fs->fs_spec, 313 mntbuf->f_mntfromname) == 0 && 314 strcmp(fs->fs_file, 315 mntbuf->f_mntonname) == 0) { 316 have_fstab = 1; 317 mntfromname = mntbuf->f_mntfromname; 318 } else if (argv[0][0] == '/' && 319 argv[0][1] == '\0') { 320 fs = getfsfile("/"); 321 have_fstab = 1; 322 mntfromname = fs->fs_spec; 323 } 324 } 325 if (have_fstab) { 326 options = update_options(options, fs->fs_mntops, 327 mntbuf->f_flags); 328 } else { 329 mntfromname = mntbuf->f_mntfromname; 330 options = update_options(options, NULL, 331 mntbuf->f_flags); 332 } 333 rval = mountfs(mntbuf->f_fstypename, mntfromname, 334 mntbuf->f_mntonname, init_flags, options, 0); 335 break; 336 } 337 if ((fs = getfsfile(*argv)) == NULL && 338 (fs = getfsspec(*argv)) == NULL) 339 errx(1, "%s: unknown special file or file system", 340 *argv); 341 if (BADTYPE(fs->fs_type)) 342 errx(1, "%s has unknown file system type", 343 *argv); 344 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 345 init_flags, options, fs->fs_mntops); 346 break; 347 case 2: 348 /* 349 * If -t flag has not been specified, the path cannot be 350 * found, spec contains either a ':' or a '@', then assume 351 * that an NFS file system is being specified ala Sun. 352 * Check if the hostname contains only allowed characters 353 * to reduce false positives. IPv6 addresses containing 354 * ':' will be correctly parsed only if the separator is '@'. 355 * The definition of a valid hostname is taken from RFC 1034. 356 */ 357 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 358 (ep = strchr(argv[0], ':')) != NULL)) { 359 if (*ep == '@') { 360 cp = ep + 1; 361 ep = cp + strlen(cp); 362 } else 363 cp = argv[0]; 364 while (cp != ep) { 365 if (!isdigit(*cp) && !isalpha(*cp) && 366 *cp != '.' && *cp != '-' && *cp != ':') 367 break; 368 cp++; 369 } 370 if (cp == ep) 371 vfstype = "nfs"; 372 } 373 rval = mountfs(vfstype, 374 argv[0], argv[1], init_flags, options, NULL); 375 break; 376 default: 377 usage(); 378 /* NOTREACHED */ 379 } 380 381 /* 382 * If the mount was successfully, and done by root, tell mountd the 383 * good news. Pid checks are probably unnecessary, but don't hurt. 384 */ 385 if (rval == 0 && getuid() == 0 && 386 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 387 if (fscanf(mountdfp, "%d", &pid) == 1 && 388 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) 389 err(1, "signal mountd"); 390 (void)fclose(mountdfp); 391 } 392 393 exit(rval); 394} 395 396int 397ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 398{ 399 char realfsfile[PATH_MAX]; 400 int i; 401 402 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 403 /* the root file system can always be remounted */ 404 return (0); 405 406 /* The user may have specified a symlink in fstab, resolve the path */ 407 if (realpath(fs->fs_file, realfsfile) == NULL) { 408 /* Cannot resolve the path, use original one */ 409 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 410 } 411 412 for (i = mntsize - 1; i >= 0; --i) 413 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 414 (!isremountable(fs->fs_vfstype) || 415 strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) 416 return (1); 417 return (0); 418} 419 420int 421isremountable(const char *vfsname) 422{ 423 const char **cp; 424 425 for (cp = remountable_fs_names; *cp; cp++) 426 if (strcmp(*cp, vfsname) == 0) 427 return (1); 428 return (0); 429} 430 431int 432hasopt(const char *mntopts, const char *option) 433{ 434 int negative, found; 435 char *opt, *optbuf; 436 437 if (option[0] == 'n' && option[1] == 'o') { 438 negative = 1; 439 option += 2; 440 } else 441 negative = 0; 442 optbuf = strdup(mntopts); 443 found = 0; 444 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 445 if (opt[0] == 'n' && opt[1] == 'o') { 446 if (!strcasecmp(opt + 2, option)) 447 found = negative; 448 } else if (!strcasecmp(opt, option)) 449 found = !negative; 450 } 451 free(optbuf); 452 return (found); 453} 454 455int 456mountfs(const char *vfstype, const char *spec, const char *name, int flags, 457 const char *options, const char *mntopts) 458{ 459 char *argv[100]; 460 struct statfs sf; 461 int argc, i, ret; 462 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 463 464 /* resolve the mountpoint with realpath(3) */ 465 (void)checkpath(name, mntpath); 466 name = mntpath; 467 468 if (mntopts == NULL) 469 mntopts = ""; 470 optbuf = catopt(strdup(mntopts), options); 471 472 if (strcmp(name, "/") == 0) 473 flags |= MNT_UPDATE; 474 if (flags & MNT_FORCE) 475 optbuf = catopt(optbuf, "force"); 476 if (flags & MNT_RDONLY) 477 optbuf = catopt(optbuf, "ro"); 478 /* 479 * XXX 480 * The mount_mfs (newfs) command uses -o to select the 481 * optimization mode. We don't pass the default "-o rw" 482 * for that reason. 483 */ 484 if (flags & MNT_UPDATE) 485 optbuf = catopt(optbuf, "update"); 486 487 /* Compatibility glue. */ 488 if (strcmp(vfstype, "msdos") == 0) 489 vfstype = "msdosfs"; 490 491 /* Construct the name of the appropriate mount command */ 492 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 493 494 argc = 0; 495 argv[argc++] = execname; 496 mangle(optbuf, &argc, argv); 497 argv[argc++] = strdup(spec); 498 argv[argc++] = strdup(name); 499 argv[argc] = NULL; 500 501 if (debug) { 502 (void)printf("exec: mount_%s", vfstype); 503 for (i = 1; i < argc; i++) 504 (void)printf(" %s", argv[i]); 505 (void)printf("\n"); 506 return (0); 507 } 508 509 if (use_mountprog(vfstype)) { 510 ret = exec_mountprog(name, execname, argv); 511 } else { 512 ret = mount_fs(vfstype, argc, argv); 513 } 514 515 free(optbuf); 516 517 if (verbose) { 518 if (statfs(name, &sf) < 0) { 519 warn("statfs %s", name); 520 return (1); 521 } 522 if (fstab_style) 523 putfsent(&sf); 524 else 525 prmount(&sf); 526 } 527 528 return (0); 529} 530 531void 532prmount(struct statfs *sfp) 533{ 534 int flags; 535 unsigned int i; 536 struct opt *o; 537 struct passwd *pw; 538 539 (void)printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, 540 sfp->f_fstypename); 541 542 flags = sfp->f_flags & MNT_VISFLAGMASK; 543 for (o = optnames; flags && o->o_opt; o++) 544 if (flags & o->o_opt) { 545 (void)printf(", %s", o->o_name); 546 flags &= ~o->o_opt; 547 } 548 /* 549 * Inform when file system is mounted by an unprivileged user 550 * or privileged non-root user. 551 */ 552 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 553 (void)printf(", mounted by "); 554 if ((pw = getpwuid(sfp->f_owner)) != NULL) 555 (void)printf("%s", pw->pw_name); 556 else 557 (void)printf("%d", sfp->f_owner); 558 } 559 if (verbose) { 560 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) 561 (void)printf(", writes: sync %ju async %ju", 562 (uintmax_t)sfp->f_syncwrites, 563 (uintmax_t)sfp->f_asyncwrites); 564 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) 565 (void)printf(", reads: sync %ju async %ju", 566 (uintmax_t)sfp->f_syncreads, 567 (uintmax_t)sfp->f_asyncreads); 568 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 569 printf(", fsid "); 570 for (i = 0; i < sizeof(sfp->f_fsid); i++) 571 printf("%02x", ((u_char *)&sfp->f_fsid)[i]); 572 } 573 } 574 (void)printf(")\n"); 575} 576 577struct statfs * 578getmntpt(const char *name) 579{ 580 struct statfs *mntbuf; 581 int i, mntsize; 582 583 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 584 for (i = mntsize - 1; i >= 0; i--) { 585 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 586 strcmp(mntbuf[i].f_mntonname, name) == 0) 587 return (&mntbuf[i]); 588 } 589 return (NULL); 590} 591 592char * 593catopt(char *s0, const char *s1) 594{ 595 size_t i; 596 char *cp; 597 598 if (s1 == NULL || *s1 == '\0') 599 return s0; 600 601 if (s0 && *s0) { 602 i = strlen(s0) + strlen(s1) + 1 + 1; 603 if ((cp = malloc(i)) == NULL) 604 errx(1, "malloc failed"); 605 (void)snprintf(cp, i, "%s,%s", s0, s1); 606 } else 607 cp = strdup(s1); 608 609 if (s0) 610 free(s0); 611 return (cp); 612} 613 614void 615mangle(options, argcp, argv) 616 char *options; 617 int *argcp; 618 char **argv; 619{ 620 char *p, *s; 621 int argc; 622 623 argc = *argcp; 624 for (s = options; (p = strsep(&s, ",")) != NULL;) 625 if (*p != '\0') { 626 if (strcmp(p, "noauto") == 0) { 627 /* 628 * Do not pass noauto option to nmount(). 629 * or external mount program. noauto is 630 * only used to prevent mounting a filesystem 631 * when 'mount -a' is specified, and is 632 * not a real mount option. 633 */ 634 continue; 635 } else if (strcmp(p, "userquota") == 0) { 636 continue; 637 } else if (strncmp(p, userquotaeq, 638 sizeof(userquotaeq) - 1) == 0) { 639 continue; 640 } else if (strcmp(p, "groupquota") == 0) { 641 continue; 642 } else if (strncmp(p, groupquotaeq, 643 sizeof(groupquotaeq) - 1) == 0) { 644 continue; 645 } else if (*p == '-') { 646 argv[argc++] = p; 647 p = strchr(p, '='); 648 if (p != NULL) { 649 *p = '\0'; 650 argv[argc++] = p+1; 651 } 652 } else { 653 argv[argc++] = strdup("-o"); 654 argv[argc++] = p; 655 } 656 } 657 658 *argcp = argc; 659} 660 661 662char * 663update_options(opts, fstab, curflags) 664 char *opts; 665 char *fstab; 666 int curflags; 667{ 668 char *o, *p; 669 char *cur; 670 char *expopt, *newopt, *tmpopt; 671 672 if (opts == NULL) 673 return strdup(""); 674 675 /* remove meta options from list */ 676 remopt(fstab, MOUNT_META_OPTION_FSTAB); 677 remopt(fstab, MOUNT_META_OPTION_CURRENT); 678 cur = flags2opts(curflags); 679 680 /* 681 * Expand all meta-options passed to us first. 682 */ 683 expopt = NULL; 684 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 685 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 686 expopt = catopt(expopt, fstab); 687 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 688 expopt = catopt(expopt, cur); 689 else 690 expopt = catopt(expopt, o); 691 } 692 free(cur); 693 free(opts); 694 695 /* 696 * Remove previous contradictory arguments. Given option "foo" we 697 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 698 * and "foo" - so we can deal with possible options like "notice". 699 */ 700 newopt = NULL; 701 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 702 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 703 errx(1, "malloc failed"); 704 705 strcpy(tmpopt, "no"); 706 strcat(tmpopt, o); 707 remopt(newopt, tmpopt); 708 free(tmpopt); 709 710 if (strncmp("no", o, 2) == 0) 711 remopt(newopt, o+2); 712 713 newopt = catopt(newopt, o); 714 } 715 free(expopt); 716 717 return newopt; 718} 719 720void 721remopt(string, opt) 722 char *string; 723 const char *opt; 724{ 725 char *o, *p, *r; 726 727 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 728 return; 729 730 r = string; 731 732 for (p = string; (o = strsep(&p, ",")) != NULL;) { 733 if (strcmp(opt, o) != 0) { 734 if (*r == ',' && *o != '\0') 735 r++; 736 while ((*r++ = *o++) != '\0') 737 ; 738 *--r = ','; 739 } 740 } 741 *r = '\0'; 742} 743 744void 745usage() 746{ 747 748 (void)fprintf(stderr, "%s\n%s\n%s\n", 749"usage: mount [-adfpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 750" mount [-dfpruvw] special | node", 751" mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 752 exit(1); 753} 754 755void 756putfsent(ent) 757 const struct statfs *ent; 758{ 759 struct fstab *fst; 760 char *opts; 761 762 opts = flags2opts(ent->f_flags); 763 764 /* 765 * "rw" is not a real mount option; this is why we print NULL as "rw" 766 * if opts is still NULL here. 767 */ 768 printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname, 769 ent->f_fstypename, opts ? opts : "rw"); 770 free(opts); 771 772 if ((fst = getfsspec(ent->f_mntfromname))) 773 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 774 else if ((fst = getfsfile(ent->f_mntonname))) 775 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 776 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 777 if (strcmp(ent->f_mntonname, "/") == 0) 778 printf("\t1 1\n"); 779 else 780 printf("\t2 2\n"); 781 } else 782 printf("\t0 0\n"); 783} 784 785 786char * 787flags2opts(flags) 788 int flags; 789{ 790 char *res; 791 792 res = NULL; 793 794 if (flags & MNT_RDONLY) res = catopt(res, "ro"); 795 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 796 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 797 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 798 if (flags & MNT_UNION) res = catopt(res, "union"); 799 if (flags & MNT_ASYNC) res = catopt(res, "async"); 800 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 801 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 802 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 803 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 804 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 805 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 806 if (flags & MNT_ACLS) res = catopt(res, "acls"); 807 808 return res; 809} 810