1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1989, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static const char copyright[] = 34 "@(#) Copyright (c) 1980, 1989, 1993, 1994\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #if 0 37 static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95"; 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD$"); 43 44 #include <sys/param.h> 45 #define _WANT_MNTOPTNAMES 46 #include <sys/mount.h> 47 #include <sys/stat.h> 48 #include <sys/wait.h> 49 50 #include <ctype.h> 51 #include <err.h> 52 #include <errno.h> 53 #include <fstab.h> 54 #include <paths.h> 55 #include <pwd.h> 56 #include <signal.h> 57 #include <stdint.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 #include <libutil.h> 63 #include <libxo/xo.h> 64 65 #include "extern.h" 66 #include "mntopts.h" 67 #include "pathnames.h" 68 69 #define EXIT(a) { \ 70 xo_close_container("mount"); \ 71 xo_finish(); \ 72 exit(a); \ 73 } 74 75 /* `meta' options */ 76 #define MOUNT_META_OPTION_FSTAB "fstab" 77 #define MOUNT_META_OPTION_CURRENT "current" 78 79 static int debug, fstab_style, verbose; 80 81 struct cpa { 82 char **a; 83 ssize_t sz; 84 int c; 85 }; 86 87 char *catopt(char *, const char *); 88 struct statfs *getmntpt(const char *); 89 int hasopt(const char *, const char *); 90 int ismounted(struct fstab *, struct statfs *, int); 91 int isremountable(const char *); 92 int allow_file_mount(const char *); 93 void mangle(char *, struct cpa *); 94 char *update_options(char *, char *, int); 95 int mountfs(const char *, const char *, const char *, 96 int, const char *, const char *); 97 void remopt(char *, const char *); 98 void prmount(struct statfs *); 99 void putfsent(struct statfs *); 100 void usage(void); 101 char *flags2opts(int); 102 103 /* Map from mount options to printable formats. */ 104 static struct mntoptnames optnames[] = { 105 MNTOPT_NAMES 106 }; 107 108 /* 109 * List of VFS types that can be remounted without becoming mounted on top 110 * of each other. 111 * XXX Is this list correct? 112 */ 113 static const char * 114 remountable_fs_names[] = { 115 "ufs", "ffs", "ext2fs", 116 0 117 }; 118 119 static const char userquotaeq[] = "userquota="; 120 static const char groupquotaeq[] = "groupquota="; 121 122 static char *mountprog = NULL; 123 124 static int 125 use_mountprog(const char *vfstype) 126 { 127 /* XXX: We need to get away from implementing external mount 128 * programs for every filesystem, and move towards having 129 * each filesystem properly implement the nmount() system call. 130 */ 131 unsigned int i; 132 const char *fs[] = { 133 "cd9660", "mfs", "msdosfs", "nfs", 134 "nullfs", "smbfs", "udf", "unionfs", 135 NULL 136 }; 137 138 if (mountprog != NULL) 139 return (1); 140 141 for (i = 0; fs[i] != NULL; ++i) { 142 if (strcmp(vfstype, fs[i]) == 0) 143 return (1); 144 } 145 146 return (0); 147 } 148 149 static int 150 exec_mountprog(const char *name, const char *execname, char *const argv[]) 151 { 152 pid_t pid; 153 int status; 154 155 switch (pid = fork()) { 156 case -1: /* Error. */ 157 xo_warn("fork"); 158 EXIT(1); 159 case 0: /* Child. */ 160 /* Go find an executable. */ 161 execvP(execname, _PATH_SYSPATH, argv); 162 if (errno == ENOENT) { 163 xo_warn("exec %s not found", execname); 164 if (execname[0] != '/') { 165 xo_warnx("in path: %s", _PATH_SYSPATH); 166 } 167 } 168 EXIT(1); 169 default: /* Parent. */ 170 if (waitpid(pid, &status, 0) < 0) { 171 xo_warn("waitpid"); 172 return (1); 173 } 174 175 if (WIFEXITED(status)) { 176 if (WEXITSTATUS(status) != 0) 177 return (WEXITSTATUS(status)); 178 } else if (WIFSIGNALED(status)) { 179 xo_warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 180 return (1); 181 } 182 break; 183 } 184 185 return (0); 186 } 187 188 static int 189 specified_ro(const char *arg) 190 { 191 char *optbuf, *opt; 192 int ret = 0; 193 194 optbuf = strdup(arg); 195 if (optbuf == NULL) 196 xo_err(1, "strdup failed"); 197 198 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 199 if (strcmp(opt, "ro") == 0) { 200 ret = 1; 201 break; 202 } 203 } 204 free(optbuf); 205 return (ret); 206 } 207 208 static void 209 restart_mountd(void) 210 { 211 212 pidfile_signal(_PATH_MOUNTDPID, SIGHUP, NULL); 213 } 214 215 int 216 main(int argc, char *argv[]) 217 { 218 const char *mntfromname, **vfslist, *vfstype; 219 struct fstab *fs; 220 struct statfs *mntbuf; 221 int all, ch, i, init_flags, late, failok, mntsize, rval, have_fstab, ro; 222 int onlylate; 223 char *cp, *ep, *options; 224 225 all = init_flags = late = onlylate = 0; 226 ro = 0; 227 options = NULL; 228 vfslist = NULL; 229 vfstype = "ufs"; 230 231 argc = xo_parse_args(argc, argv); 232 if (argc < 0) 233 exit(1); 234 xo_open_container("mount"); 235 236 while ((ch = getopt(argc, argv, "adF:fLlno:prt:uvw")) != -1) 237 switch (ch) { 238 case 'a': 239 all = 1; 240 break; 241 case 'd': 242 debug = 1; 243 break; 244 case 'F': 245 setfstab(optarg); 246 break; 247 case 'f': 248 init_flags |= MNT_FORCE; 249 break; 250 case 'L': 251 onlylate = 1; 252 late = 1; 253 break; 254 case 'l': 255 late = 1; 256 break; 257 case 'n': 258 /* For compatibility with the Linux version of mount. */ 259 break; 260 case 'o': 261 if (*optarg) { 262 options = catopt(options, optarg); 263 if (specified_ro(optarg)) 264 ro = 1; 265 } 266 break; 267 case 'p': 268 fstab_style = 1; 269 verbose = 1; 270 break; 271 case 'r': 272 options = catopt(options, "ro"); 273 ro = 1; 274 break; 275 case 't': 276 if (vfslist != NULL) 277 xo_errx(1, "only one -t option may be specified"); 278 vfslist = makevfslist(optarg); 279 vfstype = optarg; 280 break; 281 case 'u': 282 init_flags |= MNT_UPDATE; 283 break; 284 case 'v': 285 verbose = 1; 286 break; 287 case 'w': 288 options = catopt(options, "noro"); 289 break; 290 case '?': 291 default: 292 usage(); 293 /* NOTREACHED */ 294 } 295 argc -= optind; 296 argv += optind; 297 298 #define BADTYPE(type) \ 299 (strcmp(type, FSTAB_RO) && \ 300 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 301 302 if ((init_flags & MNT_UPDATE) && (ro == 0)) 303 options = catopt(options, "noro"); 304 305 rval = 0; 306 switch (argc) { 307 case 0: 308 if ((mntsize = getmntinfo(&mntbuf, 309 verbose ? MNT_WAIT : MNT_NOWAIT)) == 0) 310 xo_err(1, "getmntinfo"); 311 if (all) { 312 while ((fs = getfsent()) != NULL) { 313 if (BADTYPE(fs->fs_type)) 314 continue; 315 if (checkvfsname(fs->fs_vfstype, vfslist)) 316 continue; 317 if (hasopt(fs->fs_mntops, "noauto")) 318 continue; 319 if (!hasopt(fs->fs_mntops, "late") && onlylate) 320 continue; 321 if (hasopt(fs->fs_mntops, "late") && !late) 322 continue; 323 if (hasopt(fs->fs_mntops, "failok")) 324 failok = 1; 325 else 326 failok = 0; 327 if (!(init_flags & MNT_UPDATE) && 328 !hasopt(fs->fs_mntops, "update") && 329 ismounted(fs, mntbuf, mntsize)) 330 continue; 331 options = update_options(options, fs->fs_mntops, 332 mntbuf->f_flags); 333 if (mountfs(fs->fs_vfstype, fs->fs_spec, 334 fs->fs_file, init_flags, options, 335 fs->fs_mntops) && !failok) 336 rval = 1; 337 } 338 } else if (fstab_style) { 339 xo_open_list("fstab"); 340 for (i = 0; i < mntsize; i++) { 341 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 342 continue; 343 xo_open_instance("fstab"); 344 putfsent(&mntbuf[i]); 345 xo_close_instance("fstab"); 346 } 347 xo_close_list("fstab"); 348 } else { 349 xo_open_list("mounted"); 350 for (i = 0; i < mntsize; i++) { 351 if (checkvfsname(mntbuf[i].f_fstypename, 352 vfslist)) 353 continue; 354 if (!verbose && 355 (mntbuf[i].f_flags & MNT_IGNORE) != 0) 356 continue; 357 xo_open_instance("mounted"); 358 prmount(&mntbuf[i]); 359 xo_close_instance("mounted"); 360 } 361 xo_close_list("mounted"); 362 } 363 EXIT(rval); 364 case 1: 365 if (vfslist != NULL) 366 usage(); 367 368 rmslashes(*argv, *argv); 369 if (init_flags & MNT_UPDATE) { 370 mntfromname = NULL; 371 have_fstab = 0; 372 if ((mntbuf = getmntpt(*argv)) == NULL) 373 xo_errx(1, "not currently mounted %s", *argv); 374 /* 375 * Only get the mntflags from fstab if both mntpoint 376 * and mntspec are identical. Also handle the special 377 * case where just '/' is mounted and 'spec' is not 378 * identical with the one from fstab ('/dev' is missing 379 * in the spec-string at boot-time). 380 */ 381 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { 382 if (strcmp(fs->fs_spec, 383 mntbuf->f_mntfromname) == 0 && 384 strcmp(fs->fs_file, 385 mntbuf->f_mntonname) == 0) { 386 have_fstab = 1; 387 mntfromname = mntbuf->f_mntfromname; 388 } else if (argv[0][0] == '/' && 389 argv[0][1] == '\0' && 390 strcmp(fs->fs_vfstype, 391 mntbuf->f_fstypename) == 0) { 392 fs = getfsfile("/"); 393 have_fstab = 1; 394 mntfromname = fs->fs_spec; 395 } 396 } 397 if (have_fstab) { 398 options = update_options(options, fs->fs_mntops, 399 mntbuf->f_flags); 400 } else { 401 mntfromname = mntbuf->f_mntfromname; 402 options = update_options(options, NULL, 403 mntbuf->f_flags); 404 } 405 rval = mountfs(mntbuf->f_fstypename, mntfromname, 406 mntbuf->f_mntonname, init_flags, options, 0); 407 break; 408 } 409 if ((fs = getfsfile(*argv)) == NULL && 410 (fs = getfsspec(*argv)) == NULL) 411 xo_errx(1, "%s: unknown special file or file system", 412 *argv); 413 if (BADTYPE(fs->fs_type)) 414 xo_errx(1, "%s has unknown file system type", 415 *argv); 416 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 417 init_flags, options, fs->fs_mntops); 418 break; 419 case 2: 420 /* 421 * If -t flag has not been specified, the path cannot be 422 * found, spec contains either a ':' or a '@', then assume 423 * that an NFS file system is being specified ala Sun. 424 * Check if the hostname contains only allowed characters 425 * to reduce false positives. IPv6 addresses containing 426 * ':' will be correctly parsed only if the separator is '@'. 427 * The definition of a valid hostname is taken from RFC 1034. 428 */ 429 if (vfslist == NULL && ((ep = strchr(argv[0], '@')) != NULL || 430 (ep = strchr(argv[0], ':')) != NULL)) { 431 if (*ep == '@') { 432 cp = ep + 1; 433 ep = cp + strlen(cp); 434 } else 435 cp = argv[0]; 436 while (cp != ep) { 437 if (!isdigit(*cp) && !isalpha(*cp) && 438 *cp != '.' && *cp != '-' && *cp != ':') 439 break; 440 cp++; 441 } 442 if (cp == ep) 443 vfstype = "nfs"; 444 } 445 rval = mountfs(vfstype, 446 argv[0], argv[1], init_flags, options, NULL); 447 break; 448 default: 449 usage(); 450 /* NOTREACHED */ 451 } 452 453 /* 454 * If the mount was successfully, and done by root, tell mountd the 455 * good news. 456 */ 457 if (rval == 0 && getuid() == 0) 458 restart_mountd(); 459 460 EXIT(rval); 461 } 462 463 int 464 ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) 465 { 466 char realfsfile[PATH_MAX]; 467 int i; 468 469 if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') 470 /* the root file system can always be remounted */ 471 return (0); 472 473 /* The user may have specified a symlink in fstab, resolve the path */ 474 if (realpath(fs->fs_file, realfsfile) == NULL) { 475 /* Cannot resolve the path, use original one */ 476 strlcpy(realfsfile, fs->fs_file, sizeof(realfsfile)); 477 } 478 479 /* 480 * Consider the filesystem to be mounted if: 481 * It has the same mountpoint as a mounted filesystem, and 482 * It has the same type as that same mounted filesystem, and 483 * It has the same device name as that same mounted filesystem, OR 484 * It is a nonremountable filesystem 485 */ 486 for (i = mntsize - 1; i >= 0; --i) 487 if (strcmp(realfsfile, mntbuf[i].f_mntonname) == 0 && 488 strcmp(fs->fs_vfstype, mntbuf[i].f_fstypename) == 0 && 489 (!isremountable(fs->fs_vfstype) || 490 (strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0))) 491 return (1); 492 return (0); 493 } 494 495 int 496 isremountable(const char *vfsname) 497 { 498 const char **cp; 499 500 for (cp = remountable_fs_names; *cp; cp++) 501 if (strcmp(*cp, vfsname) == 0) 502 return (1); 503 return (0); 504 } 505 506 int 507 allow_file_mount(const char *vfsname) 508 { 509 510 if (strcmp(vfsname, "nullfs") == 0) 511 return (1); 512 return (0); 513 } 514 515 int 516 hasopt(const char *mntopts, const char *option) 517 { 518 int negative, found; 519 char *opt, *optbuf; 520 521 if (option[0] == 'n' && option[1] == 'o') { 522 negative = 1; 523 option += 2; 524 } else 525 negative = 0; 526 optbuf = strdup(mntopts); 527 found = 0; 528 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 529 if (opt[0] == 'n' && opt[1] == 'o') { 530 if (!strcasecmp(opt + 2, option)) 531 found = negative; 532 } else if (!strcasecmp(opt, option)) 533 found = !negative; 534 } 535 free(optbuf); 536 return (found); 537 } 538 539 static void 540 append_arg(struct cpa *sa, char *arg) 541 { 542 if (sa->c + 1 == sa->sz) { 543 sa->sz = sa->sz == 0 ? 8 : sa->sz * 2; 544 sa->a = realloc(sa->a, sizeof(*sa->a) * sa->sz); 545 if (sa->a == NULL) 546 xo_errx(1, "realloc failed"); 547 } 548 sa->a[++sa->c] = arg; 549 } 550 551 int 552 mountfs(const char *vfstype, const char *spec, const char *name, int flags, 553 const char *options, const char *mntopts) 554 { 555 struct statfs sf; 556 int i, ret; 557 char *optbuf, execname[PATH_MAX], mntpath[PATH_MAX]; 558 static struct cpa mnt_argv; 559 560 /* resolve the mountpoint with realpath(3) */ 561 if (allow_file_mount(vfstype)) { 562 if (checkpath_allow_file(name, mntpath) != 0) { 563 xo_warn("%s", mntpath); 564 return (1); 565 } 566 } else { 567 if (checkpath(name, mntpath) != 0) { 568 xo_warn("%s", mntpath); 569 return (1); 570 } 571 } 572 name = mntpath; 573 574 if (mntopts == NULL) 575 mntopts = ""; 576 optbuf = catopt(strdup(mntopts), options); 577 578 if (strcmp(name, "/") == 0) 579 flags |= MNT_UPDATE; 580 if (flags & MNT_FORCE) 581 optbuf = catopt(optbuf, "force"); 582 if (flags & MNT_RDONLY) 583 optbuf = catopt(optbuf, "ro"); 584 /* 585 * XXX 586 * The mount_mfs (newfs) command uses -o to select the 587 * optimization mode. We don't pass the default "-o rw" 588 * for that reason. 589 */ 590 if (flags & MNT_UPDATE) 591 optbuf = catopt(optbuf, "update"); 592 593 /* Compatibility glue. */ 594 if (strcmp(vfstype, "msdos") == 0) 595 vfstype = "msdosfs"; 596 597 /* Construct the name of the appropriate mount command */ 598 (void)snprintf(execname, sizeof(execname), "mount_%s", vfstype); 599 600 mnt_argv.c = -1; 601 append_arg(&mnt_argv, execname); 602 mangle(optbuf, &mnt_argv); 603 if (mountprog != NULL) 604 strlcpy(execname, mountprog, sizeof(execname)); 605 606 append_arg(&mnt_argv, strdup(spec)); 607 append_arg(&mnt_argv, strdup(name)); 608 append_arg(&mnt_argv, NULL); 609 610 if (debug) { 611 if (use_mountprog(vfstype)) 612 xo_emit("{Lwc:exec}{:execname/%s}", execname); 613 else 614 xo_emit("{:execname/mount}{P: }{l:opts/-t}{P: }{l:opts/%s}", vfstype); 615 for (i = 1; i < mnt_argv.c; i++) 616 xo_emit("{P: }{l:opts}", mnt_argv.a[i]); 617 xo_emit("\n"); 618 free(optbuf); 619 free(mountprog); 620 mountprog = NULL; 621 return (0); 622 } 623 624 if (use_mountprog(vfstype)) { 625 ret = exec_mountprog(name, execname, mnt_argv.a); 626 } else { 627 ret = mount_fs(vfstype, mnt_argv.c, mnt_argv.a); 628 } 629 630 free(optbuf); 631 free(mountprog); 632 mountprog = NULL; 633 634 if (verbose) { 635 if (statfs(name, &sf) < 0) { 636 xo_warn("statfs %s", name); 637 return (1); 638 } 639 if (fstab_style) { 640 xo_open_list("fstab"); 641 xo_open_instance("fstab"); 642 putfsent(&sf); 643 xo_close_instance("fstab"); 644 xo_close_list("fstab"); 645 } else { 646 xo_open_list("mounted"); 647 xo_open_instance("mounted"); 648 prmount(&sf); 649 xo_close_instance("mounted"); 650 xo_close_list("mounted"); 651 } 652 } 653 654 return (ret); 655 } 656 657 void 658 prmount(struct statfs *sfp) 659 { 660 uint64_t flags; 661 unsigned int i; 662 struct mntoptnames *o; 663 struct passwd *pw; 664 char *fsidbuf; 665 666 xo_emit("{:special/%hs}{L: on }{:node/%hs}{L: (}{:fstype}", sfp->f_mntfromname, 667 sfp->f_mntonname, sfp->f_fstypename); 668 669 flags = sfp->f_flags & MNT_VISFLAGMASK; 670 for (o = optnames; flags != 0 && o->o_opt != 0; o++) 671 if (flags & o->o_opt) { 672 xo_emit("{D:, }{l:opts}", o->o_name); 673 flags &= ~o->o_opt; 674 } 675 /* 676 * Inform when file system is mounted by an unprivileged user 677 * or privileged non-root user. 678 */ 679 if ((flags & MNT_USER) != 0 || sfp->f_owner != 0) { 680 xo_emit("{D:, }{L:mounted by }"); 681 if ((pw = getpwuid(sfp->f_owner)) != NULL) 682 xo_emit("{:mounter/%hs}", pw->pw_name); 683 else 684 xo_emit("{:mounter/%hs}", sfp->f_owner); 685 } 686 if (verbose) { 687 if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) { 688 xo_open_container("writes"); 689 xo_emit("{D:, }{Lwc:writes}{Lw:sync}{w:sync/%ju}{Lw:async}{:async/%ju}", 690 (uintmax_t)sfp->f_syncwrites, 691 (uintmax_t)sfp->f_asyncwrites); 692 xo_close_container("writes"); 693 } 694 if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) { 695 xo_open_container("reads"); 696 xo_emit("{D:, }{Lwc:reads}{Lw:sync}{w:sync/%ju}{Lw:async}{:async/%ju}", 697 (uintmax_t)sfp->f_syncreads, 698 (uintmax_t)sfp->f_asyncreads); 699 xo_close_container("reads"); 700 } 701 if (sfp->f_fsid.val[0] != 0 || sfp->f_fsid.val[1] != 0) { 702 fsidbuf = malloc(sizeof(sfp->f_fsid) * 2 + 1); 703 if (fsidbuf == NULL) 704 xo_errx(1, "malloc failed"); 705 for (i = 0; i < sizeof(sfp->f_fsid); i++) 706 sprintf(&fsidbuf[i * 2], "%02x", 707 ((u_char *)&sfp->f_fsid)[i]); 708 fsidbuf[i * 2] = '\0'; 709 xo_emit("{D:, }{Lw:fsid}{:fsid}", fsidbuf); 710 free(fsidbuf); 711 } 712 if (sfp->f_nvnodelistsize != 0) { 713 xo_open_container("vnodes"); 714 xo_emit("{D:, }{Lwc:vnodes}{Lw:count}{w:count/%ju}", 715 (uintmax_t)sfp->f_nvnodelistsize); 716 xo_close_container("vnodes"); 717 } 718 } 719 xo_emit("{D:)}\n"); 720 } 721 722 struct statfs * 723 getmntpt(const char *name) 724 { 725 struct statfs *mntbuf; 726 int i, mntsize; 727 728 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 729 for (i = mntsize - 1; i >= 0; i--) { 730 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 731 strcmp(mntbuf[i].f_mntonname, name) == 0) 732 return (&mntbuf[i]); 733 } 734 return (NULL); 735 } 736 737 char * 738 catopt(char *s0, const char *s1) 739 { 740 char *cp; 741 742 if (s1 == NULL || *s1 == '\0') 743 return (s0); 744 745 if (s0 && *s0) { 746 if (asprintf(&cp, "%s,%s", s0, s1) == -1) 747 xo_errx(1, "asprintf failed"); 748 } else 749 cp = strdup(s1); 750 751 if (s0) 752 free(s0); 753 return (cp); 754 } 755 756 void 757 mangle(char *options, struct cpa *a) 758 { 759 char *p, *s, *val; 760 761 for (s = options; (p = strsep(&s, ",")) != NULL;) 762 if (*p != '\0') { 763 if (strcmp(p, "noauto") == 0) { 764 /* 765 * Do not pass noauto option to nmount(). 766 * or external mount program. noauto is 767 * only used to prevent mounting a filesystem 768 * when 'mount -a' is specified, and is 769 * not a real mount option. 770 */ 771 continue; 772 } else if (strcmp(p, "late") == 0) { 773 /* 774 * "late" is used to prevent certain file 775 * systems from being mounted before late 776 * in the boot cycle; for instance, 777 * loopback NFS mounts can't be mounted 778 * before mountd starts. 779 */ 780 continue; 781 } else if (strcmp(p, "failok") == 0) { 782 /* 783 * "failok" is used to prevent certain file 784 * systems from being causing the system to 785 * drop into single user mode in the boot 786 * cycle, and is not a real mount option. 787 */ 788 continue; 789 } else if (strncmp(p, "mountprog", 9) == 0) { 790 /* 791 * "mountprog" is used to force the use of 792 * userland mount programs. 793 */ 794 val = strchr(p, '='); 795 if (val != NULL) { 796 ++val; 797 if (*val != '\0') 798 mountprog = strdup(val); 799 } 800 801 if (mountprog == NULL) { 802 xo_errx(1, "Need value for -o mountprog"); 803 } 804 continue; 805 } else if (strcmp(p, "userquota") == 0) { 806 continue; 807 } else if (strncmp(p, userquotaeq, 808 sizeof(userquotaeq) - 1) == 0) { 809 continue; 810 } else if (strcmp(p, "groupquota") == 0) { 811 continue; 812 } else if (strncmp(p, groupquotaeq, 813 sizeof(groupquotaeq) - 1) == 0) { 814 continue; 815 } else if (*p == '-') { 816 append_arg(a, p); 817 p = strchr(p, '='); 818 if (p != NULL) { 819 *p = '\0'; 820 append_arg(a, p + 1); 821 } 822 } else { 823 append_arg(a, strdup("-o")); 824 append_arg(a, p); 825 } 826 } 827 } 828 829 830 char * 831 update_options(char *opts, char *fstab, int curflags) 832 { 833 char *o, *p; 834 char *cur; 835 char *expopt, *newopt, *tmpopt; 836 837 if (opts == NULL) 838 return (strdup("")); 839 840 /* remove meta options from list */ 841 remopt(fstab, MOUNT_META_OPTION_FSTAB); 842 remopt(fstab, MOUNT_META_OPTION_CURRENT); 843 cur = flags2opts(curflags); 844 845 /* 846 * Expand all meta-options passed to us first. 847 */ 848 expopt = NULL; 849 for (p = opts; (o = strsep(&p, ",")) != NULL;) { 850 if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) 851 expopt = catopt(expopt, fstab); 852 else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) 853 expopt = catopt(expopt, cur); 854 else 855 expopt = catopt(expopt, o); 856 } 857 free(cur); 858 free(opts); 859 860 /* 861 * Remove previous contradictory arguments. Given option "foo" we 862 * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" 863 * and "foo" - so we can deal with possible options like "notice". 864 */ 865 newopt = NULL; 866 for (p = expopt; (o = strsep(&p, ",")) != NULL;) { 867 if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) 868 xo_errx(1, "malloc failed"); 869 870 strcpy(tmpopt, "no"); 871 strcat(tmpopt, o); 872 remopt(newopt, tmpopt); 873 free(tmpopt); 874 875 if (strncmp("no", o, 2) == 0) 876 remopt(newopt, o+2); 877 878 newopt = catopt(newopt, o); 879 } 880 free(expopt); 881 882 return (newopt); 883 } 884 885 void 886 remopt(char *string, const char *opt) 887 { 888 char *o, *p, *r; 889 890 if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') 891 return; 892 893 r = string; 894 895 for (p = string; (o = strsep(&p, ",")) != NULL;) { 896 if (strcmp(opt, o) != 0) { 897 if (*r == ',' && *o != '\0') 898 r++; 899 while ((*r++ = *o++) != '\0') 900 ; 901 *--r = ','; 902 } 903 } 904 *r = '\0'; 905 } 906 907 void 908 usage(void) 909 { 910 911 xo_error("%s\n%s\n%s\n", 912 "usage: mount [-adflpruvw] [-F fstab] [-o options] [-t ufs | external_type]", 913 " mount [-dfpruvw] special | node", 914 " mount [-dfpruvw] [-o options] [-t ufs | external_type] special node"); 915 EXIT(1); 916 } 917 918 void 919 putfsent(struct statfs *ent) 920 { 921 struct fstab *fst; 922 char *opts, *rw; 923 int l; 924 925 opts = NULL; 926 /* flags2opts() doesn't return the "rw" option. */ 927 if ((ent->f_flags & MNT_RDONLY) != 0) 928 rw = NULL; 929 else 930 rw = catopt(NULL, "rw"); 931 932 opts = flags2opts(ent->f_flags); 933 opts = catopt(rw, opts); 934 935 if (strncmp(ent->f_mntfromname, "<below>", 7) == 0 || 936 strncmp(ent->f_mntfromname, "<above>", 7) == 0) { 937 strlcpy(ent->f_mntfromname, 938 (strnstr(ent->f_mntfromname, ":", 8) +1), 939 sizeof(ent->f_mntfromname)); 940 } 941 942 l = strlen(ent->f_mntfromname); 943 xo_emit("{:device}{P:/%s}{P:/%s}{P:/%s}", 944 ent->f_mntfromname, 945 l < 8 ? "\t" : "", 946 l < 16 ? "\t" : "", 947 l < 24 ? "\t" : " "); 948 l = strlen(ent->f_mntonname); 949 xo_emit("{:mntpoint}{P:/%s}{P:/%s}{P:/%s}", 950 ent->f_mntonname, 951 l < 8 ? "\t" : "", 952 l < 16 ? "\t" : "", 953 l < 24 ? "\t" : " "); 954 xo_emit("{:fstype}{P:\t}", ent->f_fstypename); 955 l = strlen(opts); 956 xo_emit("{:opts}{P:/%s}", opts, 957 l < 8 ? "\t" : " "); 958 free(opts); 959 960 if ((fst = getfsspec(ent->f_mntfromname))) 961 xo_emit("{P:\t}{n:dump/%u}{P: }{n:pass/%u}\n", 962 fst->fs_freq, fst->fs_passno); 963 else if ((fst = getfsfile(ent->f_mntonname))) 964 xo_emit("{P:\t}{n:dump/%u}{P: }{n:pass/%u}\n", 965 fst->fs_freq, fst->fs_passno); 966 else if (strcmp(ent->f_fstypename, "ufs") == 0) { 967 if (strcmp(ent->f_mntonname, "/") == 0) 968 xo_emit("{P:\t}{n:dump/1}{P: }{n:pass/1}\n"); 969 else 970 xo_emit("{P:\t}{n:dump/2}{P: }{n:pass/2}\n"); 971 } else 972 xo_emit("{P:\t}{n:dump/0}{P: }{n:pass/0}\n"); 973 } 974 975 976 char * 977 flags2opts(int flags) 978 { 979 char *res; 980 981 res = NULL; 982 983 if (flags & MNT_RDONLY) res = catopt(res, "ro"); 984 if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); 985 if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); 986 if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); 987 if (flags & MNT_UNION) res = catopt(res, "union"); 988 if (flags & MNT_ASYNC) res = catopt(res, "async"); 989 if (flags & MNT_NOATIME) res = catopt(res, "noatime"); 990 if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); 991 if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); 992 if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); 993 if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); 994 if (flags & MNT_MULTILABEL) res = catopt(res, "multilabel"); 995 if (flags & MNT_ACLS) res = catopt(res, "acls"); 996 if (flags & MNT_NFS4ACLS) res = catopt(res, "nfsv4acls"); 997 if (flags & MNT_UNTRUSTED) res = catopt(res, "untrusted"); 998 if (flags & MNT_NOCOVER) res = catopt(res, "nocover"); 999 if (flags & MNT_EMPTYDIR) res = catopt(res, "emptydir"); 1000 1001 return (res); 1002 } 1003