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 34 #ifndef lint 35 static char copyright[] = 36 "@(#) Copyright (c) 1980, 1989, 1993, 1994\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)mount.c 8.25 (Berkeley) 5/8/95"; 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 <err.h> 50 #include <errno.h> 51 #include <fstab.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 "pathnames.h" 60 61 int debug, fstab_style, verbose; 62 63 int checkvfsname __P((const char *, const char **)); 64 char *catopt __P((char *, const char *)); 65 struct statfs 66 *getmntpt __P((const char *)); 67 int hasopt __P((const char *, const char *)); 68 const char 69 **makevfslist __P((char *)); 70 void mangle __P((char *, int *, const char **)); 71 int mountfs __P((const char *, const char *, const char *, 72 int, const char *, const char *)); 73 void prmount __P((struct statfs *)); 74 void putfsent __P((const struct statfs *)); 75 void usage __P((void)); 76 77 /* From mount_ufs.c. */ 78 int mount_ufs __P((int, char * const *)); 79 80 /* Map from mount otions to printable formats. */ 81 static struct opt { 82 int o_opt; 83 const char *o_name; 84 } optnames[] = { 85 { MNT_ASYNC, "asynchronous" }, 86 { MNT_EXPORTED, "NFS exported" }, 87 { MNT_LOCAL, "local" }, 88 { MNT_NOATIME, "noatime" }, 89 { MNT_NODEV, "nodev" }, 90 { MNT_NOEXEC, "noexec" }, 91 { MNT_NOSUID, "nosuid" }, 92 { MNT_QUOTA, "with quotas" }, 93 { MNT_RDONLY, "read-only" }, 94 { MNT_SYNCHRONOUS, "synchronous" }, 95 { MNT_UNION, "union" }, 96 { NULL } 97 }; 98 99 int 100 main(argc, argv) 101 int argc; 102 char * const argv[]; 103 { 104 const char *mntfromname, **vfslist, *vfstype; 105 struct fstab *fs; 106 struct statfs *mntbuf; 107 FILE *mountdfp; 108 pid_t pid; 109 int all, ch, i, init_flags, mntsize, rval; 110 char *options; 111 112 all = init_flags = 0; 113 options = NULL; 114 vfslist = NULL; 115 vfstype = "ufs"; 116 while ((ch = getopt(argc, argv, "adfo:prwt:uv")) != -1) 117 switch (ch) { 118 case 'a': 119 all = 1; 120 break; 121 case 'd': 122 debug = 1; 123 break; 124 case 'f': 125 init_flags |= MNT_FORCE; 126 break; 127 case 'o': 128 if (*optarg) 129 options = catopt(options, optarg); 130 break; 131 case 'p': 132 fstab_style = 1; 133 verbose = 1; 134 break; 135 case 'r': 136 init_flags |= MNT_RDONLY; 137 break; 138 case 't': 139 if (vfslist != NULL) 140 errx(1, "only one -t option may be specified."); 141 vfslist = makevfslist(optarg); 142 vfstype = optarg; 143 break; 144 case 'u': 145 init_flags |= MNT_UPDATE; 146 break; 147 case 'v': 148 verbose = 1; 149 break; 150 case 'w': 151 init_flags &= ~MNT_RDONLY; 152 break; 153 case '?': 154 default: 155 usage(); 156 /* NOTREACHED */ 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 (all) 169 while ((fs = getfsent()) != NULL) { 170 if (BADTYPE(fs->fs_type)) 171 continue; 172 if (checkvfsname(fs->fs_vfstype, vfslist)) 173 continue; 174 if (hasopt(fs->fs_mntops, "noauto")) 175 continue; 176 if (mountfs(fs->fs_vfstype, fs->fs_spec, 177 fs->fs_file, init_flags, options, 178 fs->fs_mntops)) 179 rval = 1; 180 } 181 else if (fstab_style) { 182 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 183 err(1, "getmntinfo"); 184 for (i = 0; i < mntsize; i++) { 185 if (checkvfsname(mntbuf[i].f_fstypename, vfslist)) 186 continue; 187 putfsent(&mntbuf[i]); 188 } 189 } else { 190 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 191 err(1, "getmntinfo"); 192 for (i = 0; i < mntsize; i++) { 193 if (checkvfsname(mntbuf[i].f_fstypename, 194 vfslist)) 195 continue; 196 prmount(&mntbuf[i]); 197 } 198 } 199 exit(rval); 200 case 1: 201 if (vfslist != NULL) 202 usage(); 203 204 if (init_flags & MNT_UPDATE) { 205 if ((mntbuf = getmntpt(*argv)) == NULL) 206 errx(1, 207 "unknown special file or file system %s.", 208 *argv); 209 if ((fs = getfsfile(mntbuf->f_mntonname)) != NULL) 210 mntfromname = fs->fs_spec; 211 else 212 mntfromname = mntbuf->f_mntfromname; 213 rval = mountfs(mntbuf->f_fstypename, mntfromname, 214 mntbuf->f_mntonname, init_flags, options, 0); 215 break; 216 } 217 if ((fs = getfsfile(*argv)) == NULL && 218 (fs = getfsspec(*argv)) == NULL) 219 errx(1, "%s: unknown special file or file system.", 220 *argv); 221 if (BADTYPE(fs->fs_type)) 222 errx(1, "%s has unknown file system type.", 223 *argv); 224 rval = mountfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, 225 init_flags, options, fs->fs_mntops); 226 break; 227 case 2: 228 /* 229 * If -t flag has not been specified, and spec contains either 230 * a ':' or a '@' then assume that an NFS filesystem is being 231 * specified ala Sun. 232 */ 233 if (vfslist == NULL && strpbrk(argv[0], ":@") != NULL) 234 vfstype = "nfs"; 235 rval = mountfs(vfstype, 236 argv[0], argv[1], init_flags, options, NULL); 237 break; 238 default: 239 usage(); 240 /* NOTREACHED */ 241 } 242 243 /* 244 * If the mount was successfully, and done by root, tell mountd the 245 * good news. Pid checks are probably unnecessary, but don't hurt. 246 */ 247 if (rval == 0 && getuid() == 0 && 248 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 249 if (fscanf(mountdfp, "%ld", &pid) == 1 && 250 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) 251 err(1, "signal mountd"); 252 (void)fclose(mountdfp); 253 } 254 255 exit(rval); 256 } 257 258 int 259 hasopt(mntopts, option) 260 const char *mntopts, *option; 261 { 262 int negative, found; 263 char *opt, *optbuf; 264 265 if (option[0] == 'n' && option[1] == 'o') { 266 negative = 1; 267 option += 2; 268 } else 269 negative = 0; 270 optbuf = strdup(mntopts); 271 found = 0; 272 for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) { 273 if (opt[0] == 'n' && opt[1] == 'o') { 274 if (!strcasecmp(opt + 2, option)) 275 found = negative; 276 } else if (!strcasecmp(opt, option)) 277 found = !negative; 278 } 279 free(optbuf); 280 return (found); 281 } 282 283 int 284 mountfs(vfstype, spec, name, flags, options, mntopts) 285 const char *vfstype, *spec, *name, *options, *mntopts; 286 int flags; 287 { 288 /* List of directories containing mount_xxx subcommands. */ 289 static const char *edirs[] = { 290 _PATH_SBIN, 291 _PATH_USRSBIN, 292 NULL 293 }; 294 const char *argv[100], **edir; 295 struct stat sb; 296 struct statfs sf; 297 pid_t pid; 298 int argc, i, status; 299 char *optbuf, execname[MAXPATHLEN + 1], mntpath[MAXPATHLEN]; 300 301 if (realpath(name, mntpath) != NULL && stat(mntpath, &sb) == 0) { 302 if (!S_ISDIR(sb.st_mode)) { 303 warnx("%s: Not a directory", mntpath); 304 return (1); 305 } 306 } else { 307 warn("%s", mntpath); 308 return (1); 309 } 310 311 name = mntpath; 312 313 if (mntopts == NULL) 314 mntopts = ""; 315 if (options == NULL) { 316 if (*mntopts == '\0') { 317 options = "rw"; 318 } else { 319 options = mntopts; 320 mntopts = ""; 321 } 322 } 323 optbuf = catopt(strdup(mntopts), options); 324 325 if (strcmp(name, "/") == 0) 326 flags |= MNT_UPDATE; 327 if (flags & MNT_FORCE) 328 optbuf = catopt(optbuf, "force"); 329 if (flags & MNT_RDONLY) 330 optbuf = catopt(optbuf, "ro"); 331 /* 332 * XXX 333 * The mount_mfs (newfs) command uses -o to select the 334 * optimisation mode. We don't pass the default "-o rw" 335 * for that reason. 336 */ 337 if (flags & MNT_UPDATE) 338 optbuf = catopt(optbuf, "update"); 339 340 argc = 0; 341 argv[argc++] = vfstype; 342 mangle(optbuf, &argc, argv); 343 argv[argc++] = spec; 344 argv[argc++] = name; 345 argv[argc] = NULL; 346 347 if (debug) { 348 (void)printf("exec: mount_%s", vfstype); 349 for (i = 1; i < argc; i++) 350 (void)printf(" %s", argv[i]); 351 (void)printf("\n"); 352 return (0); 353 } 354 355 switch (pid = vfork()) { 356 case -1: /* Error. */ 357 warn("vfork"); 358 free(optbuf); 359 return (1); 360 case 0: /* Child. */ 361 if (strcmp(vfstype, "ufs") == 0) 362 exit(mount_ufs(argc, (char * const *) argv)); 363 364 /* Go find an executable. */ 365 for (edir = edirs; *edir; edir++) { 366 (void)snprintf(execname, 367 sizeof(execname), "%s/mount_%s", *edir, vfstype); 368 execv(execname, (char * const *)argv); 369 } 370 if (errno == ENOENT) { 371 int len = 0; 372 char *cp; 373 for (edir = edirs; *edir; edir++) 374 len += strlen(*edir) + 2; /* ", " */ 375 if ((cp = malloc(len)) == NULL) { 376 warn(NULL); 377 exit(1); 378 } 379 cp[0] = '\0'; 380 for (edir = edirs; *edir; edir++) { 381 strcat(cp, *edir); 382 if (edir[1] != NULL) 383 strcat(cp, ", "); 384 } 385 warn("exec mount_%s not found in %s", vfstype, cp); 386 } 387 exit(1); 388 /* NOTREACHED */ 389 default: /* Parent. */ 390 free(optbuf); 391 392 if (waitpid(pid, &status, 0) < 0) { 393 warn("waitpid"); 394 return (1); 395 } 396 397 if (WIFEXITED(status)) { 398 if (WEXITSTATUS(status) != 0) 399 return (WEXITSTATUS(status)); 400 } else if (WIFSIGNALED(status)) { 401 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 402 return (1); 403 } 404 405 if (verbose) { 406 if (statfs(name, &sf) < 0) { 407 warn("statfs %s", name); 408 return (1); 409 } 410 if (fstab_style) 411 putfsent(&sf); 412 else 413 prmount(&sf); 414 } 415 break; 416 } 417 418 return (0); 419 } 420 421 void 422 prmount(sfp) 423 struct statfs *sfp; 424 { 425 int flags; 426 struct opt *o; 427 struct passwd *pw; 428 int f; 429 430 (void)printf("%s on %s", sfp->f_mntfromname, sfp->f_mntonname); 431 432 flags = sfp->f_flags & MNT_VISFLAGMASK; 433 for (f = 0, o = optnames; flags && o->o_opt; o++) 434 if (flags & o->o_opt) { 435 (void)printf("%s%s", !f++ ? " (" : ", ", o->o_name); 436 flags &= ~o->o_opt; 437 } 438 if (sfp->f_owner) { 439 (void)printf("%smounted by ", !f++ ? " (" : ", "); 440 if ((pw = getpwuid(sfp->f_owner)) != NULL) 441 (void)printf("%s", pw->pw_name); 442 else 443 (void)printf("%d", sfp->f_owner); 444 } 445 (void)printf(f ? ")\n" : "\n"); 446 } 447 448 struct statfs * 449 getmntpt(name) 450 const char *name; 451 { 452 struct statfs *mntbuf; 453 int i, mntsize; 454 455 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 456 for (i = 0; i < mntsize; i++) 457 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 458 strcmp(mntbuf[i].f_mntonname, name) == 0) 459 return (&mntbuf[i]); 460 return (NULL); 461 } 462 463 char * 464 catopt(s0, s1) 465 char *s0; 466 const char *s1; 467 { 468 size_t i; 469 char *cp; 470 471 if (s0 && *s0) { 472 i = strlen(s0) + strlen(s1) + 1 + 1; 473 if ((cp = malloc(i)) == NULL) 474 err(1, NULL); 475 (void)snprintf(cp, i, "%s,%s", s0, s1); 476 } else 477 cp = strdup(s1); 478 479 if (s0) 480 free(s0); 481 return (cp); 482 } 483 484 void 485 mangle(options, argcp, argv) 486 char *options; 487 int *argcp; 488 const char **argv; 489 { 490 char *p, *s; 491 int argc; 492 493 argc = *argcp; 494 for (s = options; (p = strsep(&s, ",")) != NULL;) 495 if (*p != '\0') 496 if (*p == '-') { 497 argv[argc++] = p; 498 p = strchr(p, '='); 499 if (p) { 500 *p = '\0'; 501 argv[argc++] = p+1; 502 } 503 } else if (strcmp(p, "rw") != 0) { 504 argv[argc++] = "-o"; 505 argv[argc++] = p; 506 } 507 508 *argcp = argc; 509 } 510 511 void 512 usage() 513 { 514 515 (void)fprintf(stderr, 516 "usage: mount %s %s\n mount %s\n mount %s\n", 517 "[-dfpruvw] [-o options] [-t ufs | external_type]", 518 "special node", 519 "[-adfpruvw] [-t ufs | external_type]", 520 "[-dfpruvw] special | node"); 521 exit(1); 522 } 523 524 void 525 putfsent(ent) 526 const struct statfs *ent; 527 { 528 struct fstab *fst; 529 530 printf("%s\t%s\t%s %s", ent->f_mntfromname, ent->f_mntonname, 531 ent->f_fstypename, (ent->f_flags & MNT_RDONLY) ? "ro" : "rw"); 532 533 /* XXX should use optnames[] - put shorter names in it. */ 534 if (ent->f_flags & MNT_SYNCHRONOUS) 535 printf(",sync"); 536 if (ent->f_flags & MNT_NOEXEC) 537 printf(",noexec"); 538 if (ent->f_flags & MNT_NOSUID) 539 printf(",nosuid"); 540 if (ent->f_flags & MNT_NODEV) 541 printf(",nodev"); 542 if (ent->f_flags & MNT_UNION) 543 printf(",union"); 544 if (ent->f_flags & MNT_ASYNC) 545 printf(",async"); 546 if (ent->f_flags & MNT_NOATIME) 547 printf(",noatime"); 548 549 if (fst = getfsspec(ent->f_mntfromname)) 550 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 551 else if (fst = getfsfile(ent->f_mntonname)) 552 printf("\t%u %u\n", fst->fs_freq, fst->fs_passno); 553 else if (ent->f_type == MOUNT_UFS) 554 printf("\t1 1\n"); 555 else 556 printf("\t0 0\n"); 557 } 558