| 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 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | * |
| 33 | * @(#) Copyright (c) 1980, 1989, 1993, 1994 The Regents of the University of California. All rights reserved. |
| 34 | * @(#)mount.c 8.25 (Berkeley) 5/8/95 |
| 35 | * $FreeBSD: src/sbin/mount/mount.c,v 1.39.2.3 2001/08/01 08:26:23 obrien Exp $ |
| 36 | */ |
| 37 | |
| 38 | #include <sys/param.h> |
| 39 | #include <sys/mount.h> |
| 40 | #include <sys/mountctl.h> |
| 41 | #define DKTYPENAMES |
| 42 | #include <sys/dtype.h> |
| 43 | #include <sys/diskslice.h> |
| 44 | #include <sys/stat.h> |
| 45 | #include <sys/wait.h> |
| 46 | |
| 47 | #include <err.h> |
| 48 | #include <errno.h> |
| 49 | #include <fcntl.h> |
| 50 | #include <fstab.h> |
| 51 | #include <mntopts.h> |
| 52 | #include <pwd.h> |
| 53 | #include <signal.h> |
| 54 | #include <stdio.h> |
| 55 | #include <stdlib.h> |
| 56 | #include <string.h> |
| 57 | #include <unistd.h> |
| 58 | |
| 59 | #include "extern.h" |
| 60 | #include "pathnames.h" |
| 61 | |
| 62 | /* `meta' options */ |
| 63 | #define MOUNT_META_OPTION_FSTAB "fstab" |
| 64 | #define MOUNT_META_OPTION_CURRENT "current" |
| 65 | |
| 66 | int debug, fstab_style, verbose; |
| 67 | |
| 68 | static char *catopt(char *, const char *); |
| 69 | static struct statfs |
| 70 | *getmntpt(const char *); |
| 71 | static int hasopt(const char *, const char *); |
| 72 | static int ismounted(struct fstab *, struct statfs *, int); |
| 73 | static int isremountable(const char *); |
| 74 | static void mangle(char *, int *, const char **); |
| 75 | static char *update_options(char *, char *, int); |
| 76 | static int mountfs(const char *, const char *, const char *, |
| 77 | int, const char *, const char *); |
| 78 | static void remopt(char *, const char *); |
| 79 | static void printdefvals(const struct statfs *); |
| 80 | static void prmount(struct statfs *); |
| 81 | static void putfsent(const struct statfs *); |
| 82 | static void usage(void); |
| 83 | static char *flags2opts(int); |
| 84 | static char *xstrdup(const char *str); |
| 85 | static void checkdisklabel(const char *devpath, const char **vfstypep); |
| 86 | |
| 87 | /* |
| 88 | * List of VFS types that can be remounted without becoming mounted on top |
| 89 | * of each other. |
| 90 | * XXX Is this list correct? |
| 91 | */ |
| 92 | static const char *remountable_fs_names[] = { |
| 93 | "ufs", "ffs", "ext2fs", "hammer", "hammer2", |
| 94 | NULL |
| 95 | }; |
| 96 | |
| 97 | int |
| 98 | main(int argc, char **argv) |
| 99 | { |
| 100 | const char *mntfromname, **vfslist, *vfstype; |
| 101 | struct fstab *fs; |
| 102 | struct statfs *mntbuf; |
| 103 | FILE *mountdfp; |
| 104 | pid_t pid; |
| 105 | int all, ch, i, init_flags, mntsize, rval, have_fstab; |
| 106 | char *options; |
| 107 | |
| 108 | all = init_flags = 0; |
| 109 | options = NULL; |
| 110 | vfslist = NULL; |
| 111 | vfstype = "ufs"; |
| 112 | while ((ch = getopt(argc, argv, "adF:fo:prwt:uv")) != -1) { |
| 113 | switch (ch) { |
| 114 | case 'a': |
| 115 | all = 1; |
| 116 | break; |
| 117 | case 'd': |
| 118 | debug = 1; |
| 119 | break; |
| 120 | case 'F': |
| 121 | setfstab(optarg); |
| 122 | break; |
| 123 | case 'f': |
| 124 | init_flags |= MNT_FORCE; |
| 125 | break; |
| 126 | case 'o': |
| 127 | if (*optarg) |
| 128 | options = catopt(options, optarg); |
| 129 | break; |
| 130 | case 'p': |
| 131 | fstab_style = 1; |
| 132 | verbose = 1; |
| 133 | break; |
| 134 | case 'r': |
| 135 | options = catopt(options, "ro"); |
| 136 | break; |
| 137 | case 't': |
| 138 | if (vfslist != NULL) |
| 139 | errx(1, "only one -t option may be specified"); |
| 140 | vfslist = makevfslist(optarg); |
| 141 | vfstype = optarg; |
| 142 | break; |
| 143 | case 'u': |
| 144 | init_flags |= MNT_UPDATE; |
| 145 | break; |
| 146 | case 'v': |
| 147 | verbose = 1; |
| 148 | break; |
| 149 | case 'w': |
| 150 | options = catopt(options, "noro"); |
| 151 | break; |
| 152 | case '?': |
| 153 | default: |
| 154 | usage(); |
| 155 | /* NOTREACHED */ |
| 156 | } |
| 157 | } |
| 158 | argc -= optind; |
| 159 | argv += optind; |
| 160 | |
| 161 | #define BADTYPE(type) \ |
| 162 | (strcmp(type, FSTAB_RO) && \ |
| 163 | strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) |
| 164 | |
| 165 | rval = 0; |
| 166 | switch (argc) { |
| 167 | case 0: |
| 168 | if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) |
| 169 | err(1, "getmntinfo"); |
| 170 | if (all) { |
| 171 | while ((fs = getfsent()) != NULL) { |
| 172 | if (BADTYPE(fs->fs_type)) |
| 173 | continue; |
| 174 | if (checkvfsname(fs->fs_vfstype, vfslist)) |
| 175 | continue; |
| 176 | if (hasopt(fs->fs_mntops, "noauto")) |
| 177 | continue; |
| 178 | if (!(init_flags & MNT_UPDATE) && |
| 179 | ismounted(fs, mntbuf, mntsize)) |
| 180 | continue; |
| 181 | options = update_options(options, |
| 182 | fs->fs_mntops, mntbuf->f_flags); |
| 183 | if (mountfs(fs->fs_vfstype, fs->fs_spec, |
| 184 | fs->fs_file, init_flags, options, |
| 185 | fs->fs_mntops)) |
| 186 | rval = 1; |
| 187 | } |
| 188 | } else if (fstab_style) { |
| 189 | for (i = 0; i < mntsize; i++) { |
| 190 | if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) |
| 191 | continue; |
| 192 | putfsent(&mntbuf[i]); |
| 193 | } |
| 194 | } else { |
| 195 | for (i = 0; i < mntsize; i++) { |
| 196 | if (checkvfsname(mntbuf[i].f_fstypename, |
| 197 | vfslist)) |
| 198 | continue; |
| 199 | prmount(&mntbuf[i]); |
| 200 | } |
| 201 | } |
| 202 | exit(rval); |
| 203 | case 1: |
| 204 | if (vfslist != NULL) |
| 205 | usage(); |
| 206 | |
| 207 | rmslashes(*argv, *argv); |
| 208 | |
| 209 | if (init_flags & MNT_UPDATE) { |
| 210 | mntfromname = NULL; |
| 211 | have_fstab = 0; |
| 212 | if ((mntbuf = getmntpt(*argv)) == NULL) |
| 213 | errx(1, "not currently mounted %s", *argv); |
| 214 | /* |
| 215 | * Only get the mntflags from fstab if both mntpoint |
| 216 | * and mntspec are identical. Also handle the special |
| 217 | * case where just '/' is mounted and 'spec' is not |
| 218 | * identical with the one from fstab ('/dev' is missing |
| 219 | * in the spec-string at boot-time). |
| 220 | */ |
| 221 | if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) { |
| 222 | if (strcmp(fs->fs_spec, |
| 223 | mntbuf->f_mntfromname) == 0 && |
| 224 | strcmp(fs->fs_file, |
| 225 | mntbuf->f_mntonname) == 0) { |
| 226 | have_fstab = 1; |
| 227 | mntfromname = mntbuf->f_mntfromname; |
| 228 | } else if (argv[0][0] == '/' && |
| 229 | argv[0][1] == '\0') { |
| 230 | fs = getfsfile("/"); |
| 231 | have_fstab = 1; |
| 232 | mntfromname = fs->fs_spec; |
| 233 | } |
| 234 | } |
| 235 | if (have_fstab) { |
| 236 | options = update_options(options, fs->fs_mntops, |
| 237 | mntbuf->f_flags); |
| 238 | } else { |
| 239 | mntfromname = mntbuf->f_mntfromname; |
| 240 | options = update_options(options, NULL, |
| 241 | mntbuf->f_flags); |
| 242 | } |
| 243 | rval = mountfs(mntbuf->f_fstypename, mntfromname, |
| 244 | mntbuf->f_mntonname, init_flags, options, 0); |
| 245 | break; |
| 246 | } |
| 247 | if ((fs = getfsfile(*argv)) == NULL && |
| 248 | (fs = getfsspec(*argv)) == NULL) |
| 249 | errx(1, "%s: unknown special file or file system", |
| 250 | *argv); |
| 251 | if (BADTYPE(fs->fs_type)) |
| 252 | errx(1, "%s has unknown file system type", |
| 253 | *argv); |
| 254 | rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, |
| 255 | init_flags, options, fs->fs_mntops); |
| 256 | break; |
| 257 | case 2: |
| 258 | /* |
| 259 | * If -t flag has not been specified, the path cannot be |
| 260 | * found. |
| 261 | * |
| 262 | * If the spec is not a file and contains a ':' then assume |
| 263 | * NFS. |
| 264 | * |
| 265 | * If the spec is a cdev attempt to extract the fstype from |
| 266 | * the label. |
| 267 | * |
| 268 | * When all else fails ufs is assumed. |
| 269 | */ |
| 270 | if (vfslist == NULL) { |
| 271 | if (strpbrk(argv[0], ":") != NULL && |
| 272 | access(argv[0], 0) == -1) { |
| 273 | vfstype = "nfs"; |
| 274 | } else { |
| 275 | checkdisklabel(argv[0], &vfstype); |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | rval = mountfs(vfstype, getdevpath(argv[0], 0), argv[1], |
| 280 | init_flags, options, NULL); |
| 281 | break; |
| 282 | default: |
| 283 | usage(); |
| 284 | /* NOTREACHED */ |
| 285 | } |
| 286 | |
| 287 | /* |
| 288 | * If the mount was successfully, and done by root, tell mountd the |
| 289 | * good news. Pid checks are probably unnecessary, but don't hurt. |
| 290 | */ |
| 291 | if (rval == 0 && getuid() == 0 && |
| 292 | (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { |
| 293 | if (fscanf(mountdfp, "%d", &pid) == 1 && |
| 294 | pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) |
| 295 | err(1, "signal mountd"); |
| 296 | fclose(mountdfp); |
| 297 | } |
| 298 | |
| 299 | exit(rval); |
| 300 | } |
| 301 | |
| 302 | static int |
| 303 | ismounted(struct fstab *fs, struct statfs *mntbuf, int mntsize) |
| 304 | { |
| 305 | int i; |
| 306 | |
| 307 | if (fs->fs_file[0] == '/' && fs->fs_file[1] == '\0') |
| 308 | /* the root file system can always be remounted */ |
| 309 | return (0); |
| 310 | |
| 311 | for (i = mntsize - 1; i >= 0; --i) |
| 312 | if (strcmp(fs->fs_file, mntbuf[i].f_mntonname) == 0 && |
| 313 | (!isremountable(fs->fs_vfstype) || |
| 314 | strcmp(fs->fs_spec, mntbuf[i].f_mntfromname) == 0)) |
| 315 | return (1); |
| 316 | return (0); |
| 317 | } |
| 318 | |
| 319 | static int |
| 320 | isremountable(const char *vfsname) |
| 321 | { |
| 322 | const char **cp; |
| 323 | |
| 324 | for (cp = remountable_fs_names; *cp; cp++) |
| 325 | if (strcmp(*cp, vfsname) == 0) |
| 326 | return (1); |
| 327 | return (0); |
| 328 | } |
| 329 | |
| 330 | static int |
| 331 | hasopt(const char *mntopts, const char *option) |
| 332 | { |
| 333 | int negative, found; |
| 334 | char *opt, *optbuf; |
| 335 | |
| 336 | if (option[0] == 'n' && option[1] == 'o') { |
| 337 | negative = 1; |
| 338 | option += 2; |
| 339 | } else |
| 340 | negative = 0; |
| 341 | optbuf = xstrdup(mntopts); |
| 342 | found = 0; |
| 343 | for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { |
| 344 | if (opt[0] == 'n' && opt[1] == 'o') { |
| 345 | if (!strcasecmp(opt + 2, option)) |
| 346 | found = negative; |
| 347 | } else if (!strcasecmp(opt, option)) |
| 348 | found = !negative; |
| 349 | } |
| 350 | free(optbuf); |
| 351 | return (found); |
| 352 | } |
| 353 | |
| 354 | static int |
| 355 | mountfs(const char *vfstype, const char *spec, const char *name, int flags, |
| 356 | const char *options, const char *mntopts) |
| 357 | { |
| 358 | /* List of directories containing mount_xxx subcommands. */ |
| 359 | static const char *edirs[] = { |
| 360 | _PATH_SBIN, |
| 361 | _PATH_USRSBIN, |
| 362 | NULL |
| 363 | }; |
| 364 | const char *argv[100], **edir; |
| 365 | struct statfs sf; |
| 366 | pid_t pid; |
| 367 | int argc, i, status; |
| 368 | char *optbuf, execname[MAXPATHLEN + 1], mntpath[MAXPATHLEN]; |
| 369 | |
| 370 | #if __GNUC__ |
| 371 | (void)&optbuf; |
| 372 | (void)&name; |
| 373 | #endif |
| 374 | |
| 375 | /* resolve the mountpoint with realpath(3) */ |
| 376 | checkpath(name, mntpath); |
| 377 | name = mntpath; |
| 378 | |
| 379 | if (mntopts == NULL) |
| 380 | mntopts = ""; |
| 381 | if (options == NULL) { |
| 382 | if (*mntopts == '\0') { |
| 383 | options = "rw"; |
| 384 | } else { |
| 385 | options = mntopts; |
| 386 | mntopts = ""; |
| 387 | } |
| 388 | } |
| 389 | optbuf = catopt(xstrdup(mntopts), options); |
| 390 | |
| 391 | if (strcmp(name, "/") == 0) |
| 392 | flags |= MNT_UPDATE; |
| 393 | if (flags & MNT_FORCE) |
| 394 | optbuf = catopt(optbuf, "force"); |
| 395 | if (flags & MNT_RDONLY) |
| 396 | optbuf = catopt(optbuf, "ro"); |
| 397 | /* |
| 398 | * XXX |
| 399 | * The mount_mfs (newfs) command uses -o to select the |
| 400 | * optimization mode. We don't pass the default "-o rw" |
| 401 | * for that reason. |
| 402 | */ |
| 403 | if (flags & MNT_UPDATE) |
| 404 | optbuf = catopt(optbuf, "update"); |
| 405 | |
| 406 | argc = 0; |
| 407 | argv[argc++] = vfstype; |
| 408 | mangle(optbuf, &argc, argv); |
| 409 | argv[argc++] = spec; |
| 410 | argv[argc++] = name; |
| 411 | argv[argc] = NULL; |
| 412 | |
| 413 | if (debug) { |
| 414 | printf("exec: mount_%s", vfstype); |
| 415 | for (i = 1; i < argc; i++) |
| 416 | printf(" %s", argv[i]); |
| 417 | printf("\n"); |
| 418 | return (0); |
| 419 | } |
| 420 | |
| 421 | switch (pid = fork()) { |
| 422 | case -1: /* Error. */ |
| 423 | warn("fork"); |
| 424 | free(optbuf); |
| 425 | return (1); |
| 426 | case 0: /* Child. */ |
| 427 | /* Go find an executable. */ |
| 428 | for (edir = edirs; *edir; edir++) { |
| 429 | snprintf(execname, |
| 430 | sizeof(execname), "%s/mount_%s", *edir, vfstype); |
| 431 | execv(execname, __DECONST(char * const *, argv)); |
| 432 | } |
| 433 | if (errno == ENOENT) { |
| 434 | int len = 0; |
| 435 | char *cp; |
| 436 | for (edir = edirs; *edir; edir++) |
| 437 | len += strlen(*edir) + 2; /* ", " */ |
| 438 | if ((cp = malloc(len)) == NULL) |
| 439 | errx(1, "malloc failed"); |
| 440 | cp[0] = '\0'; |
| 441 | for (edir = edirs; *edir; edir++) { |
| 442 | strcat(cp, *edir); |
| 443 | if (edir[1] != NULL) |
| 444 | strcat(cp, ", "); |
| 445 | } |
| 446 | warn("exec mount_%s not found in %s", vfstype, cp); |
| 447 | } |
| 448 | exit(1); |
| 449 | /* NOTREACHED */ |
| 450 | default: /* Parent. */ |
| 451 | free(optbuf); |
| 452 | |
| 453 | if (waitpid(pid, &status, 0) < 0) { |
| 454 | warn("waitpid"); |
| 455 | return (1); |
| 456 | } |
| 457 | |
| 458 | if (WIFEXITED(status)) { |
| 459 | if (WEXITSTATUS(status) != 0) |
| 460 | return (WEXITSTATUS(status)); |
| 461 | } else if (WIFSIGNALED(status)) { |
| 462 | warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); |
| 463 | return (1); |
| 464 | } |
| 465 | |
| 466 | if (verbose) { |
| 467 | if (statfs(name, &sf) < 0) { |
| 468 | warn("statfs %s", name); |
| 469 | return (1); |
| 470 | } |
| 471 | if (fstab_style) |
| 472 | putfsent(&sf); |
| 473 | else |
| 474 | prmount(&sf); |
| 475 | } |
| 476 | break; |
| 477 | } |
| 478 | |
| 479 | return (0); |
| 480 | } |
| 481 | |
| 482 | static void |
| 483 | prmount(struct statfs *sfp) |
| 484 | { |
| 485 | struct passwd *pw; |
| 486 | char *buf; |
| 487 | int error; |
| 488 | int len; |
| 489 | |
| 490 | error = 0; |
| 491 | len = 256; |
| 492 | |
| 493 | if ((buf = malloc(len)) == NULL) |
| 494 | errx(1, "malloc failed"); |
| 495 | |
| 496 | printf("%s on %s (%s", sfp->f_mntfromname, sfp->f_mntonname, |
| 497 | sfp->f_fstypename); |
| 498 | |
| 499 | /* Get a string buffer with all the used flags names */ |
| 500 | error = mountctl(sfp->f_mntonname, MOUNTCTL_MOUNTFLAGS, |
| 501 | -1, NULL, 0, buf, len); |
| 502 | |
| 503 | if (sfp->f_owner) { |
| 504 | printf(", mounted by "); |
| 505 | if ((pw = getpwuid(sfp->f_owner)) != NULL) |
| 506 | printf("%s", pw->pw_name); |
| 507 | else |
| 508 | printf("%d", sfp->f_owner); |
| 509 | } |
| 510 | |
| 511 | if (error == 0 && strlen(buf)) |
| 512 | printf(", %s", buf); |
| 513 | |
| 514 | if (verbose) { |
| 515 | if (sfp->f_syncwrites != 0 || sfp->f_asyncwrites != 0) |
| 516 | printf(", writes: sync %ld async %ld", |
| 517 | sfp->f_syncwrites, sfp->f_asyncwrites); |
| 518 | if (sfp->f_syncreads != 0 || sfp->f_asyncreads != 0) |
| 519 | printf(", reads: sync %ld async %ld", |
| 520 | sfp->f_syncreads, sfp->f_asyncreads); |
| 521 | } |
| 522 | printf(")\n"); |
| 523 | } |
| 524 | |
| 525 | static struct statfs * |
| 526 | getmntpt(const char *name) |
| 527 | { |
| 528 | struct statfs *mntbuf; |
| 529 | int i, mntsize; |
| 530 | |
| 531 | mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); |
| 532 | for (i = mntsize - 1; i >= 0; i--) { |
| 533 | if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || |
| 534 | strcmp(mntbuf[i].f_mntonname, name) == 0) |
| 535 | return (&mntbuf[i]); |
| 536 | } |
| 537 | return (NULL); |
| 538 | } |
| 539 | |
| 540 | static char * |
| 541 | catopt(char *s0, const char *s1) |
| 542 | { |
| 543 | size_t i; |
| 544 | char *cp; |
| 545 | |
| 546 | if (s1 == NULL || *s1 == '\0') |
| 547 | return s0; |
| 548 | |
| 549 | if (s0 && *s0) { |
| 550 | i = strlen(s0) + strlen(s1) + 1 + 1; |
| 551 | if ((cp = malloc(i)) == NULL) |
| 552 | errx(1, "malloc failed"); |
| 553 | snprintf(cp, i, "%s,%s", s0, s1); |
| 554 | } else |
| 555 | cp = xstrdup(s1); |
| 556 | |
| 557 | if (s0) |
| 558 | free(s0); |
| 559 | return (cp); |
| 560 | } |
| 561 | |
| 562 | static void |
| 563 | mangle(char *options, int *argcp, const char **argv) |
| 564 | { |
| 565 | char *p, *s; |
| 566 | int argc; |
| 567 | |
| 568 | argc = *argcp; |
| 569 | for (s = options; (p = strsep(&s, ",")) != NULL;) |
| 570 | if (*p != '\0') { |
| 571 | if (*p == '-') { |
| 572 | argv[argc++] = p; |
| 573 | p = strchr(p, '='); |
| 574 | if (p) { |
| 575 | *p = '\0'; |
| 576 | argv[argc++] = p+1; |
| 577 | } |
| 578 | } else if (strcmp(p, "rw") != 0) { |
| 579 | argv[argc++] = "-o"; |
| 580 | argv[argc++] = p; |
| 581 | } |
| 582 | } |
| 583 | |
| 584 | *argcp = argc; |
| 585 | } |
| 586 | |
| 587 | |
| 588 | static char * |
| 589 | update_options(char *opts, char *fstab, int curflags) |
| 590 | { |
| 591 | char *o, *p; |
| 592 | char *cur; |
| 593 | char *expopt, *newopt, *tmpopt; |
| 594 | |
| 595 | if (opts == NULL) |
| 596 | return xstrdup(""); |
| 597 | |
| 598 | /* remove meta options from list */ |
| 599 | remopt(fstab, MOUNT_META_OPTION_FSTAB); |
| 600 | remopt(fstab, MOUNT_META_OPTION_CURRENT); |
| 601 | cur = flags2opts(curflags); |
| 602 | |
| 603 | /* |
| 604 | * Expand all meta-options passed to us first. |
| 605 | */ |
| 606 | expopt = NULL; |
| 607 | for (p = opts; (o = strsep(&p, ",")) != NULL;) { |
| 608 | if (strcmp(MOUNT_META_OPTION_FSTAB, o) == 0) |
| 609 | expopt = catopt(expopt, fstab); |
| 610 | else if (strcmp(MOUNT_META_OPTION_CURRENT, o) == 0) |
| 611 | expopt = catopt(expopt, cur); |
| 612 | else |
| 613 | expopt = catopt(expopt, o); |
| 614 | } |
| 615 | free(cur); |
| 616 | free(opts); |
| 617 | |
| 618 | /* |
| 619 | * Remove previous contradictory arguments. Given option "foo" we |
| 620 | * remove all the "nofoo" options. Given "nofoo" we remove "nonofoo" |
| 621 | * and "foo" - so we can deal with possible options like "notice". |
| 622 | */ |
| 623 | newopt = NULL; |
| 624 | for (p = expopt; (o = strsep(&p, ",")) != NULL;) { |
| 625 | if ((tmpopt = malloc( strlen(o) + 2 + 1 )) == NULL) |
| 626 | errx(1, "malloc failed"); |
| 627 | |
| 628 | strcpy(tmpopt, "no"); |
| 629 | strcat(tmpopt, o); |
| 630 | remopt(newopt, tmpopt); |
| 631 | free(tmpopt); |
| 632 | |
| 633 | if (strncmp("no", o, 2) == 0) |
| 634 | remopt(newopt, o+2); |
| 635 | |
| 636 | newopt = catopt(newopt, o); |
| 637 | } |
| 638 | free(expopt); |
| 639 | |
| 640 | return newopt; |
| 641 | } |
| 642 | |
| 643 | static void |
| 644 | remopt(char *string, const char *opt) |
| 645 | { |
| 646 | char *o, *p, *r; |
| 647 | |
| 648 | if (string == NULL || *string == '\0' || opt == NULL || *opt == '\0') |
| 649 | return; |
| 650 | |
| 651 | r = string; |
| 652 | |
| 653 | for (p = string; (o = strsep(&p, ",")) != NULL;) { |
| 654 | if (strcmp(opt, o) != 0) { |
| 655 | if (*r == ',' && *o != '\0') |
| 656 | r++; |
| 657 | while ((*r++ = *o++) != '\0') |
| 658 | ; |
| 659 | *--r = ','; |
| 660 | } |
| 661 | } |
| 662 | *r = '\0'; |
| 663 | } |
| 664 | |
| 665 | static void |
| 666 | usage(void) |
| 667 | { |
| 668 | |
| 669 | fprintf(stderr, "%s\n%s\n%s\n", |
| 670 | "usage: mount [-adfpruvw] [-F fstab] [-o options] [-t type]", |
| 671 | " mount [-dfpruvw] {special | node}", |
| 672 | " mount [-dfpruvw] [-o options] [-t type] special node"); |
| 673 | exit(1); |
| 674 | } |
| 675 | |
| 676 | /* |
| 677 | * Prints the default values for dump frequency and pass number of fsck. |
| 678 | * This happens when mount(8) is called with -p and there is no fstab file |
| 679 | * or there is but the values aren't specified. |
| 680 | */ |
| 681 | static void |
| 682 | printdefvals(const struct statfs *ent) |
| 683 | { |
| 684 | if (strcmp(ent->f_fstypename, "ufs") == 0) { |
| 685 | if (strcmp(ent->f_mntonname, "/") == 0) |
| 686 | printf("\t1 1\n"); |
| 687 | else |
| 688 | printf("\t2 2\n"); |
| 689 | } else { |
| 690 | printf("\t0 0\n"); |
| 691 | } |
| 692 | } |
| 693 | |
| 694 | static void |
| 695 | putfsent(const struct statfs *ent) |
| 696 | { |
| 697 | struct stat sb; |
| 698 | struct fstab *fst; |
| 699 | char *opts; |
| 700 | |
| 701 | opts = flags2opts(ent->f_flags); |
| 702 | printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname, |
| 703 | ent->f_fstypename, opts); |
| 704 | free(opts); |
| 705 | |
| 706 | /* |
| 707 | * If fstab file is missing don't call getfsspec() or getfsfile() |
| 708 | * at all, because the same warning will be printed twice for every |
| 709 | * mounted filesystem. |
| 710 | */ |
| 711 | if (stat(_PATH_FSTAB, &sb) != -1) { |
| 712 | if ((fst = getfsspec(ent->f_mntfromname))) |
| 713 | printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); |
| 714 | else if ((fst = getfsfile(ent->f_mntonname))) |
| 715 | printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); |
| 716 | else |
| 717 | printdefvals(ent); |
| 718 | } else { |
| 719 | printdefvals(ent); |
| 720 | } |
| 721 | } |
| 722 | |
| 723 | |
| 724 | static char * |
| 725 | flags2opts(int flags) |
| 726 | { |
| 727 | char *res; |
| 728 | |
| 729 | res = NULL; |
| 730 | |
| 731 | res = catopt(res, (flags & MNT_RDONLY) ? "ro" : "rw"); |
| 732 | |
| 733 | if (flags & MNT_SYNCHRONOUS) res = catopt(res, "sync"); |
| 734 | if (flags & MNT_NOEXEC) res = catopt(res, "noexec"); |
| 735 | if (flags & MNT_NOSUID) res = catopt(res, "nosuid"); |
| 736 | if (flags & MNT_NODEV) res = catopt(res, "nodev"); |
| 737 | if (flags & MNT_UNION) res = catopt(res, "union"); |
| 738 | if (flags & MNT_ASYNC) res = catopt(res, "async"); |
| 739 | if (flags & MNT_NOATIME) res = catopt(res, "noatime"); |
| 740 | if (flags & MNT_NOCLUSTERR) res = catopt(res, "noclusterr"); |
| 741 | if (flags & MNT_NOCLUSTERW) res = catopt(res, "noclusterw"); |
| 742 | if (flags & MNT_NOSYMFOLLOW) res = catopt(res, "nosymfollow"); |
| 743 | if (flags & MNT_SUIDDIR) res = catopt(res, "suiddir"); |
| 744 | if (flags & MNT_IGNORE) res = catopt(res, "ignore"); |
| 745 | |
| 746 | return res; |
| 747 | } |
| 748 | |
| 749 | static char* |
| 750 | xstrdup(const char *str) |
| 751 | { |
| 752 | char* ret = strdup(str); |
| 753 | if(ret == NULL) { |
| 754 | errx(1, "strdup failed (could not allocate memory)"); |
| 755 | } |
| 756 | return ret; |
| 757 | } |
| 758 | |
| 759 | /* |
| 760 | * Hack 'cd9660' for the default fstype on cd media if no disklabel |
| 761 | * found. |
| 762 | */ |
| 763 | static int |
| 764 | iscdmedia(const char *path, int fd __unused) |
| 765 | { |
| 766 | int n; |
| 767 | |
| 768 | if (strrchr(path, '/')) |
| 769 | path = strrchr(path, '/') + 1; |
| 770 | if (sscanf(path, "acd%d", &n) == 1) |
| 771 | return 1; |
| 772 | if (sscanf(path, "cd%d", &n) == 1) |
| 773 | return 1; |
| 774 | return 0; |
| 775 | } |
| 776 | |
| 777 | /* |
| 778 | * If the device path is a cdev attempt to access the disklabel to determine |
| 779 | * the filesystem type. Adjust *vfstypep if we can figure it out |
| 780 | * definitively. |
| 781 | * |
| 782 | * Ignore any portion of the device path after an '@' or ':'. |
| 783 | */ |
| 784 | static void |
| 785 | checkdisklabel(const char *devpath, const char **vfstypep) |
| 786 | { |
| 787 | struct stat st; |
| 788 | struct partinfo info; |
| 789 | char *path = strdup(devpath); |
| 790 | int fd; |
| 791 | |
| 792 | if (strchr(path, '@')) |
| 793 | *strchr(path, '@') = 0; |
| 794 | if (strchr(path, ':')) |
| 795 | *strchr(path, ':') = 0; |
| 796 | |
| 797 | if (stat(path, &st) < 0) |
| 798 | goto done; |
| 799 | if (!S_ISCHR(st.st_mode)) |
| 800 | goto done; |
| 801 | fd = open(path, O_RDONLY); |
| 802 | if (fd < 0) |
| 803 | goto done; |
| 804 | if (ioctl(fd, DIOCGPART, &info) == 0) { |
| 805 | if (info.fstype >= 0 && info.fstype < (int)FSMAXTYPES) { |
| 806 | if (fstype_to_vfsname[info.fstype]) { |
| 807 | *vfstypep = fstype_to_vfsname[info.fstype]; |
| 808 | } else if (iscdmedia(path, fd)) { |
| 809 | *vfstypep = "cd9660"; |
| 810 | } else { |
| 811 | fprintf(stderr, |
| 812 | "mount: warning: fstype in disklabel " |
| 813 | "not set to anything I understand\n"); |
| 814 | fprintf(stderr, |
| 815 | "attempting to mount with -t ufs\n"); |
| 816 | } |
| 817 | } |
| 818 | } |
| 819 | close(fd); |
| 820 | done: |
| 821 | free(path); |
| 822 | } |