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 8.19 (Berkeley) 4/19/94"; 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/mount.h> 46 #include <sys/wait.h> 47 #include <sys/types.h> 48 #include <sys/stat.h> 49 50 #include <err.h> 51 #include <errno.h> 52 #include <fstab.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, verbose, skipvfs; 62 63 int badvfsname __P((const char *, const char **)); 64 int badvfstype __P((int, const char **)); 65 char *catopt __P((char *, const char *)); 66 struct statfs 67 *getmntpt __P((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((const char *, const char *, int)); 74 void usage __P((void)); 75 76 /* From mount_ufs.c. */ 77 int mount_ufs __P((int, char * const *)); 78 79 /* Map from mount otions to printable formats. */ 80 static struct opt { 81 int o_opt; 82 const char *o_name; 83 } optnames[] = { 84 { MNT_ASYNC, "asynchronous" }, 85 { MNT_EXPORTED, "NFS exported" }, 86 { MNT_LOCAL, "local" }, 87 { MNT_NODEV, "nodev" }, 88 { MNT_NOEXEC, "noexec" }, 89 { MNT_NOSUID, "nosuid" }, 90 { MNT_QUOTA, "with quotas" }, 91 { MNT_RDONLY, "read-only" }, 92 { MNT_SYNCHRONOUS, "synchronous" }, 93 { MNT_UNION, "union" }, 94 { MNT_USER, "user mount" }, 95 { NULL } 96 }; 97 98 int 99 main(argc, argv) 100 int argc; 101 char * const argv[]; 102 { 103 const char *mntonname, **vfslist, *vfstype; 104 struct fstab *fs; 105 struct statfs *mntbuf; 106 FILE *mountdfp; 107 pid_t pid; 108 int all, ch, i, init_flags, mntsize, rval; 109 char *options; 110 111 all = init_flags = 0; 112 options = NULL; 113 vfslist = NULL; 114 vfstype = "ufs"; 115 while ((ch = getopt(argc, argv, "adfo:rwt:uv")) != EOF) 116 switch (ch) { 117 case 'a': 118 all = 1; 119 break; 120 case 'd': 121 debug = 1; 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 'r': 131 init_flags |= MNT_RDONLY; 132 break; 133 case 't': 134 if (vfslist != NULL) 135 errx(1, "only one -t option may be specified."); 136 vfslist = makevfslist(optarg); 137 vfstype = optarg; 138 break; 139 case 'u': 140 init_flags |= MNT_UPDATE; 141 break; 142 case 'v': 143 verbose = 1; 144 break; 145 case 'w': 146 init_flags &= ~MNT_RDONLY; 147 break; 148 case '?': 149 default: 150 usage(); 151 /* NOTREACHED */ 152 } 153 argc -= optind; 154 argv += optind; 155 156 #define BADTYPE(type) \ 157 (strcmp(type, FSTAB_RO) && \ 158 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 159 160 rval = 0; 161 switch (argc) { 162 case 0: 163 if (all) 164 while ((fs = getfsent()) != NULL) { 165 if (BADTYPE(fs->fs_type)) 166 continue; 167 if (badvfsname(fs->fs_vfstype, vfslist)) 168 continue; 169 if (mountfs(fs->fs_vfstype, fs->fs_spec, 170 fs->fs_file, init_flags, options, 171 fs->fs_mntops)) 172 rval = 1; 173 } 174 else { 175 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 176 err(1, "getmntinfo"); 177 for (i = 0; i < mntsize; i++) { 178 if (badvfstype(mntbuf[i].f_type, vfslist)) 179 continue; 180 prmount(mntbuf[i].f_mntfromname, 181 mntbuf[i].f_mntonname, mntbuf[i].f_flags); 182 } 183 } 184 exit(rval); 185 case 1: 186 if (vfslist != NULL) 187 usage(); 188 189 if (init_flags & MNT_UPDATE) { 190 if ((mntbuf = getmntpt(*argv)) == NULL) 191 errx(1, 192 "unknown special file or file system %s.", 193 *argv); 194 if ((fs = getfsfile(mntbuf->f_mntonname)) == NULL) 195 errx(1, "can't find fstab entry for %s.", 196 *argv); 197 /* If it's an update, ignore the fstab file options. */ 198 fs->fs_mntops = NULL; 199 mntonname = mntbuf->f_mntonname; 200 } else { 201 if ((fs = getfsfile(*argv)) == NULL && 202 (fs = getfsspec(*argv)) == NULL) 203 errx(1, 204 "%s: unknown special file or file system.", 205 *argv); 206 if (BADTYPE(fs->fs_type)) 207 errx(1, "%s has unknown file system type.", 208 *argv); 209 mntonname = fs->fs_file; 210 } 211 rval = mountfs(fs->fs_vfstype, fs->fs_spec, 212 mntonname, init_flags, options, fs->fs_mntops); 213 break; 214 case 2: 215 /* 216 * If -t flag has not been specified, and spec contains either 217 * a ':' or a '@' then assume that an NFS filesystem is being 218 * specified ala Sun. 219 */ 220 if (vfslist == NULL && strpbrk(argv[0], ":@") != NULL) 221 vfstype = "nfs"; 222 rval = mountfs(vfstype, 223 argv[0], argv[1], init_flags, options, NULL); 224 break; 225 default: 226 usage(); 227 /* NOTREACHED */ 228 } 229 230 /* 231 * If the mount was successfully, and done by root, tell mountd the 232 * good news. Pid checks are probably unnecessary, but don't hurt. 233 */ 234 if (rval == 0 && getuid() == 0 && 235 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 236 if (fscanf(mountdfp, "%ld", &pid) == 1 && 237 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) 238 err(1, "signal mountd"); 239 (void)fclose(mountdfp); 240 } 241 242 exit(rval); 243 } 244 245 int 246 mountfs(vfstype, spec, name, flags, options, mntopts) 247 const char *vfstype, *spec, *name, *options, *mntopts; 248 int flags; 249 { 250 struct stat sb; 251 252 /* List of directories containing mount_xxx subcommands. */ 253 static const char *edirs[] = { 254 _PATH_SBIN, 255 _PATH_USRSBIN, 256 NULL 257 }; 258 const char *argv[100], **edir; 259 struct statfs sf; 260 pid_t pid; 261 int argc, i, status; 262 char *optbuf, execname[MAXPATHLEN + 1], mntpath[MAXPATHLEN]; 263 264 if (realpath(name, mntpath) != NULL && stat(mntpath, &sb) == 0) { 265 if (!S_ISDIR(sb.st_mode)) { 266 warnx("%s: Not a directory", mntpath); 267 return (1); 268 } 269 } else { 270 warn("%s", mntpath); 271 return (1); 272 } 273 274 if (mntopts == NULL) 275 mntopts = ""; 276 277 name = mntpath; 278 279 if (options == NULL) { 280 if (*mntopts == '\0') 281 options = "rw"; 282 else 283 options = mntopts; 284 mntopts = ""; 285 } 286 optbuf = catopt(strdup(mntopts), options); 287 288 if (strcmp(name, "/") == 0) 289 flags |= MNT_UPDATE; 290 if (flags & MNT_FORCE) 291 optbuf = catopt(optbuf, "force"); 292 if (flags & MNT_RDONLY) 293 optbuf = catopt(optbuf, "ro"); 294 /* 295 * XXX 296 * The mount_mfs (newfs) command uses -o to select the 297 * optimisation mode. We don't pass the default "-o rw" 298 * for that reason. 299 */ 300 if (flags & MNT_UPDATE) 301 optbuf = catopt(optbuf, "update"); 302 303 argc = 0; 304 argv[argc++] = vfstype; 305 mangle(optbuf, &argc, argv); 306 argv[argc++] = spec; 307 argv[argc++] = name; 308 argv[argc] = NULL; 309 310 if (debug) { 311 (void)printf("exec: mount_%s", vfstype); 312 for (i = 1; i < argc; i++) 313 (void)printf(" %s", argv[i]); 314 (void)printf("\n"); 315 return (0); 316 } 317 318 switch (pid = vfork()) { 319 case -1: /* Error. */ 320 warn("vfork"); 321 free(optbuf); 322 return (1); 323 case 0: /* Child. */ 324 if (strcmp(vfstype, "ufs") == 0) 325 exit(mount_ufs(argc, (char * const *) argv)); 326 327 /* Go find an executable. */ 328 edir = edirs; 329 do { 330 (void)snprintf(execname, 331 sizeof(execname), "%s/mount_%s", *edir, vfstype); 332 execv(execname, (char * const *)argv); 333 if (errno != ENOENT) 334 warn("exec %s for %s", execname, name); 335 } while (*++edir != NULL); 336 337 if (errno == ENOENT) 338 warn("exec %s for %s", execname, name); 339 exit(1); 340 /* NOTREACHED */ 341 default: /* Parent. */ 342 free(optbuf); 343 344 if (waitpid(pid, &status, 0) < 0) { 345 warn("waitpid"); 346 return (1); 347 } 348 349 if (WIFEXITED(status)) { 350 if (WEXITSTATUS(status) != 0) 351 return (WEXITSTATUS(status)); 352 } else if (WIFSIGNALED(status)) { 353 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 354 return (1); 355 } 356 357 if (verbose) { 358 if (statfs(name, &sf) < 0) { 359 warn("%s", name); 360 return (1); 361 } 362 prmount(sf.f_mntfromname, sf.f_mntonname, sf.f_flags); 363 } 364 break; 365 } 366 367 return (0); 368 } 369 370 void 371 prmount(spec, name, flags) 372 const char *spec, *name; 373 int flags; 374 { 375 struct opt *o; 376 int f; 377 378 (void)printf("%s on %s", spec, name); 379 380 flags &= MNT_VISFLAGMASK; 381 for (f = 0, o = optnames; flags && o->o_opt; o++) 382 if (flags & o->o_opt) { 383 (void)printf("%s%s", !f++ ? " (" : ", ", o->o_name); 384 flags &= ~o->o_opt; 385 } 386 (void)printf(f ? ")\n" : "\n"); 387 } 388 389 struct statfs * 390 getmntpt(name) 391 const char *name; 392 { 393 struct statfs *mntbuf; 394 int i, mntsize; 395 396 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 397 for (i = 0; i < mntsize; i++) 398 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 399 strcmp(mntbuf[i].f_mntonname, name) == 0) 400 return (&mntbuf[i]); 401 return (NULL); 402 } 403 404 int 405 badvfsname(vfsname, vfslist) 406 const char *vfsname; 407 const char **vfslist; 408 { 409 410 if (vfslist == NULL) 411 return (0); 412 while (*vfslist != NULL) { 413 if (strcmp(vfsname, *vfslist) == 0) 414 return (skipvfs); 415 ++vfslist; 416 } 417 return (!skipvfs); 418 } 419 420 int 421 badvfstype(vfstype, vfslist) 422 int vfstype; 423 const char **vfslist; 424 { 425 struct vfsconf *vfc; 426 vfc = getvfsbytype(vfstype); 427 428 if ( ! vfc ) 429 return (0); 430 431 return (badvfsname(vfc->vfc_name, vfslist)); 432 } 433 434 const char ** 435 makevfslist(fslist) 436 char *fslist; 437 { 438 const char **av; 439 int i; 440 char *nextcp; 441 442 if (fslist == NULL) 443 return (NULL); 444 if (fslist[0] == 'n' && fslist[1] == 'o') { 445 fslist += 2; 446 skipvfs = 1; 447 } 448 for (i = 0, nextcp = fslist; *nextcp; nextcp++) 449 if (*nextcp == ',') 450 i++; 451 if ((av = malloc((size_t)(i + 2) * sizeof(char *))) == NULL) { 452 warn(NULL); 453 return (NULL); 454 } 455 nextcp = fslist; 456 i = 0; 457 av[i++] = nextcp; 458 while ((nextcp = strchr(nextcp, ',')) != NULL) { 459 *nextcp++ = '\0'; 460 av[i++] = nextcp; 461 } 462 av[i++] = NULL; 463 return (av); 464 } 465 466 char * 467 catopt(s0, s1) 468 char *s0; 469 const char *s1; 470 { 471 size_t i; 472 char *cp; 473 474 if (s0 && *s0) { 475 i = strlen(s0) + strlen(s1) + 1 + 1; 476 if ((cp = malloc(i)) == NULL) 477 err(1, NULL); 478 (void)snprintf(cp, i, "%s,%s", s0, s1); 479 } else 480 cp = strdup(s1); 481 482 if (s0) 483 free(s0); 484 return (cp); 485 } 486 487 void 488 mangle(options, argcp, argv) 489 char *options; 490 int *argcp; 491 const char **argv; 492 { 493 char *p, *s; 494 int argc; 495 496 argc = *argcp; 497 for (s = options; (p = strsep(&s, ",")) != NULL;) 498 if (*p != '\0') 499 if (*p == '-') { 500 argv[argc++] = p; 501 p = strchr(p, '='); 502 if (p) { 503 *p = '\0'; 504 argv[argc++] = p+1; 505 } 506 } else if (strcmp(p, "rw") != 0) { 507 argv[argc++] = "-o"; 508 argv[argc++] = p; 509 } 510 511 *argcp = argc; 512 } 513 514 void 515 usage() 516 { 517 518 (void)fprintf(stderr, 519 "usage: mount %s %s\n mount %s\n mount %s\n", 520 "[-dfruvw] [-o options] [-t ufs | external_type]", 521 "special node", 522 "[-adfruvw] [-t ufs | external_type]", 523 "[-dfruvw] special | node"); 524 exit(1); 525 } 526