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 48 #include <err.h> 49 #include <errno.h> 50 #include <fstab.h> 51 #include <signal.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <unistd.h> 56 57 #include "pathnames.h" 58 59 int debug, verbose, skipvfs; 60 61 int badvfsname __P((const char *, const char **)); 62 int badvfstype __P((int, const char **)); 63 char *catopt __P((char *, const char *)); 64 struct statfs 65 *getmntpt __P((const char *)); 66 const char 67 **makevfslist __P((char *)); 68 void mangle __P((char *, int *, const char **)); 69 int mountfs __P((const char *, const char *, const char *, 70 int, const char *, const char *)); 71 void prmount __P((const char *, const char *, int)); 72 void usage __P((void)); 73 74 /* From mount_ufs.c. */ 75 int mount_ufs __P((int, char * const *)); 76 77 /* Map from mount otions to printable formats. */ 78 static struct opt { 79 int o_opt; 80 const char *o_name; 81 } optnames[] = { 82 { MNT_ASYNC, "asynchronous" }, 83 { MNT_EXPORTED, "NFS exported" }, 84 { MNT_LOCAL, "local" }, 85 { MNT_NODEV, "nodev" }, 86 { MNT_NOEXEC, "noexec" }, 87 { MNT_NOSUID, "nosuid" }, 88 { MNT_QUOTA, "with quotas" }, 89 { MNT_RDONLY, "read-only" }, 90 { MNT_SYNCHRONOUS, "synchronous" }, 91 { MNT_UNION, "union" }, 92 { MNT_USER, "user mount" }, 93 { NULL } 94 }; 95 96 int 97 main(argc, argv) 98 int argc; 99 char * const argv[]; 100 { 101 const char *mntonname, **vfslist, *vfstype; 102 struct fstab *fs; 103 struct statfs *mntbuf; 104 FILE *mountdfp; 105 pid_t pid; 106 int all, ch, i, init_flags, mntsize, rval; 107 char *options; 108 109 all = init_flags = 0; 110 options = NULL; 111 vfslist = NULL; 112 vfstype = "ufs"; 113 while ((ch = getopt(argc, argv, "adfo:rwt:uv")) != EOF) 114 switch (ch) { 115 case 'a': 116 all = 1; 117 break; 118 case 'd': 119 debug = 1; 120 break; 121 case 'f': 122 init_flags |= MNT_FORCE; 123 break; 124 case 'o': 125 if (*optarg) 126 options = catopt(options, optarg); 127 break; 128 case 'r': 129 init_flags |= MNT_RDONLY; 130 break; 131 case 't': 132 if (vfslist != NULL) 133 errx(1, "only one -t option may be specified."); 134 vfslist = makevfslist(optarg); 135 vfstype = optarg; 136 break; 137 case 'u': 138 init_flags |= MNT_UPDATE; 139 break; 140 case 'v': 141 verbose = 1; 142 break; 143 case 'w': 144 init_flags &= ~MNT_RDONLY; 145 break; 146 case '?': 147 default: 148 usage(); 149 /* NOTREACHED */ 150 } 151 argc -= optind; 152 argv += optind; 153 154 #define BADTYPE(type) \ 155 (strcmp(type, FSTAB_RO) && \ 156 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 157 158 rval = 0; 159 switch (argc) { 160 case 0: 161 if (all) 162 while ((fs = getfsent()) != NULL) { 163 if (BADTYPE(fs->fs_type)) 164 continue; 165 if (badvfsname(fs->fs_vfstype, vfslist)) 166 continue; 167 if (mountfs(fs->fs_vfstype, fs->fs_spec, 168 fs->fs_file, init_flags, options, 169 fs->fs_mntops)) 170 rval = 1; 171 } 172 else { 173 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 174 err(1, "getmntinfo"); 175 for (i = 0; i < mntsize; i++) { 176 if (badvfstype(mntbuf[i].f_type, vfslist)) 177 continue; 178 prmount(mntbuf[i].f_mntfromname, 179 mntbuf[i].f_mntonname, mntbuf[i].f_flags); 180 } 181 } 182 exit(rval); 183 case 1: 184 if (vfslist != NULL) 185 usage(); 186 187 if (init_flags & MNT_UPDATE) { 188 if ((mntbuf = getmntpt(*argv)) == NULL) 189 errx(1, 190 "unknown special file or file system %s.", 191 *argv); 192 if ((fs = getfsfile(mntbuf->f_mntonname)) == NULL) 193 errx(1, "can't find fstab entry for %s.", 194 *argv); 195 /* If it's an update, ignore the fstab file options. */ 196 fs->fs_mntops = NULL; 197 mntonname = mntbuf->f_mntonname; 198 } else { 199 if ((fs = getfsfile(*argv)) == NULL && 200 (fs = getfsspec(*argv)) == NULL) 201 errx(1, 202 "%s: unknown special file or file system.", 203 *argv); 204 if (BADTYPE(fs->fs_type)) 205 errx(1, "%s has unknown file system type.", 206 *argv); 207 mntonname = fs->fs_file; 208 } 209 rval = mountfs(fs->fs_vfstype, fs->fs_spec, 210 mntonname, init_flags, options, fs->fs_mntops); 211 break; 212 case 2: 213 /* 214 * If -t flag has not been specified, and spec contains either 215 * a ':' or a '@' then assume that an NFS filesystem is being 216 * specified ala Sun. 217 */ 218 if (vfslist == NULL && strpbrk(argv[0], ":@") != NULL) 219 vfstype = "nfs"; 220 rval = mountfs(vfstype, 221 argv[0], argv[1], init_flags, options, NULL); 222 break; 223 default: 224 usage(); 225 /* NOTREACHED */ 226 } 227 228 /* 229 * If the mount was successfully, and done by root, tell mountd the 230 * good news. Pid checks are probably unnecessary, but don't hurt. 231 */ 232 if (rval == 0 && getuid() == 0 && 233 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 234 if (fscanf(mountdfp, "%ld", &pid) == 1 && 235 pid > 0 && kill(pid, SIGHUP) == -1 && errno != ESRCH) 236 err(1, "signal mountd"); 237 (void)fclose(mountdfp); 238 } 239 240 exit(rval); 241 } 242 243 int 244 mountfs(vfstype, spec, name, flags, options, mntopts) 245 const char *vfstype, *spec, *name, *options, *mntopts; 246 int flags; 247 { 248 /* List of directories containing mount_xxx subcommands. */ 249 static const char *edirs[] = { 250 _PATH_SBIN, 251 _PATH_USRSBIN, 252 NULL 253 }; 254 const char *argv[100], **edir; 255 struct statfs sf; 256 pid_t pid; 257 int argc, i, status; 258 char *optbuf, execname[MAXPATHLEN + 1], mntpath[MAXPATHLEN]; 259 260 if (realpath(name, mntpath) == NULL) { 261 warn("%s", mntpath); 262 return (1); 263 } 264 265 name = mntpath; 266 267 if (options == NULL) { 268 if (mntopts == NULL || *mntopts == '\0') 269 options = "rw"; 270 else 271 options = mntopts; 272 mntopts = ""; 273 } 274 optbuf = catopt(strdup(mntopts), options); 275 276 if (strcmp(name, "/") == 0) 277 flags |= MNT_UPDATE; 278 if (flags & MNT_FORCE) 279 optbuf = catopt(optbuf, "force"); 280 if (flags & MNT_RDONLY) 281 optbuf = catopt(optbuf, "ro"); 282 /* 283 * XXX 284 * The mount_mfs (newfs) command uses -o to select the 285 * optimisation mode. We don't pass the default "-o rw" 286 * for that reason. 287 */ 288 if (flags & MNT_UPDATE) 289 optbuf = catopt(optbuf, "update"); 290 291 argc = 0; 292 argv[argc++] = vfstype; 293 mangle(optbuf, &argc, argv); 294 argv[argc++] = spec; 295 argv[argc++] = name; 296 argv[argc] = NULL; 297 298 if (debug) { 299 (void)printf("exec: mount_%s", vfstype); 300 for (i = 1; i < argc; i++) 301 (void)printf(" %s", argv[i]); 302 (void)printf("\n"); 303 return (0); 304 } 305 306 switch (pid = vfork()) { 307 case -1: /* Error. */ 308 warn("vfork"); 309 free(optbuf); 310 return (1); 311 case 0: /* Child. */ 312 if (strcmp(vfstype, "ufs") == 0) 313 exit(mount_ufs(argc, (char * const *) argv)); 314 315 /* Go find an executable. */ 316 edir = edirs; 317 do { 318 (void)snprintf(execname, 319 sizeof(execname), "%s/mount_%s", *edir, vfstype); 320 execv(execname, (char * const *)argv); 321 if (errno != ENOENT) 322 warn("exec %s for %s", execname, name); 323 } while (*++edir != NULL); 324 325 if (errno == ENOENT) 326 warn("exec %s for %s", execname, name); 327 exit(1); 328 /* NOTREACHED */ 329 default: /* Parent. */ 330 free(optbuf); 331 332 if (waitpid(pid, &status, 0) < 0) { 333 warn("waitpid"); 334 return (1); 335 } 336 337 if (WIFEXITED(status)) { 338 if (WEXITSTATUS(status) != 0) 339 return (WEXITSTATUS(status)); 340 } else if (WIFSIGNALED(status)) { 341 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 342 return (1); 343 } 344 345 if (verbose) { 346 if (statfs(name, &sf) < 0) { 347 warn("%s", name); 348 return (1); 349 } 350 prmount(sf.f_mntfromname, sf.f_mntonname, sf.f_flags); 351 } 352 break; 353 } 354 355 return (0); 356 } 357 358 void 359 prmount(spec, name, flags) 360 const char *spec, *name; 361 int flags; 362 { 363 struct opt *o; 364 int f; 365 366 (void)printf("%s on %s", spec, name); 367 368 flags &= MNT_VISFLAGMASK; 369 for (f = 0, o = optnames; flags && o->o_opt; o++) 370 if (flags & o->o_opt) { 371 (void)printf("%s%s", !f++ ? " (" : ", ", o->o_name); 372 flags &= ~o->o_opt; 373 } 374 (void)printf(f ? ")\n" : "\n"); 375 } 376 377 struct statfs * 378 getmntpt(name) 379 const char *name; 380 { 381 struct statfs *mntbuf; 382 int i, mntsize; 383 384 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 385 for (i = 0; i < mntsize; i++) 386 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 387 strcmp(mntbuf[i].f_mntonname, name) == 0) 388 return (&mntbuf[i]); 389 return (NULL); 390 } 391 392 int 393 badvfsname(vfsname, vfslist) 394 const char *vfsname; 395 const char **vfslist; 396 { 397 398 if (vfslist == NULL) 399 return (0); 400 while (*vfslist != NULL) { 401 if (strcmp(vfsname, *vfslist) == 0) 402 return (skipvfs); 403 ++vfslist; 404 } 405 return (!skipvfs); 406 } 407 408 int 409 badvfstype(vfstype, vfslist) 410 int vfstype; 411 const char **vfslist; 412 { 413 static const char *vfsnames[] = INITMOUNTNAMES; 414 415 if ((vfstype < 0) || (vfstype > MOUNT_MAXTYPE)) 416 return (0); 417 418 return (badvfsname(vfsnames[vfstype], vfslist)); 419 } 420 421 const char ** 422 makevfslist(fslist) 423 char *fslist; 424 { 425 const char **av; 426 int i; 427 char *nextcp; 428 429 if (fslist == NULL) 430 return (NULL); 431 if (fslist[0] == 'n' && fslist[1] == 'o') { 432 fslist += 2; 433 skipvfs = 1; 434 } 435 for (i = 0, nextcp = fslist; *nextcp; nextcp++) 436 if (*nextcp == ',') 437 i++; 438 if ((av = malloc((size_t)(i + 2) * sizeof(char *))) == NULL) { 439 warn(NULL); 440 return (NULL); 441 } 442 nextcp = fslist; 443 i = 0; 444 av[i++] = nextcp; 445 while ((nextcp = strchr(nextcp, ',')) != NULL) { 446 *nextcp++ = '\0'; 447 av[i++] = nextcp; 448 } 449 av[i++] = NULL; 450 return (av); 451 } 452 453 char * 454 catopt(s0, s1) 455 char *s0; 456 const char *s1; 457 { 458 size_t i; 459 char *cp; 460 461 if (s0 && *s0) { 462 i = strlen(s0) + strlen(s1) + 1 + 1; 463 if ((cp = malloc(i)) == NULL) 464 err(1, NULL); 465 (void)snprintf(cp, i, "%s,%s", s0, s1); 466 } else 467 cp = strdup(s1); 468 469 if (s0) 470 free(s0); 471 return (cp); 472 } 473 474 void 475 mangle(options, argcp, argv) 476 char *options; 477 int *argcp; 478 const char **argv; 479 { 480 char *p, *s; 481 int argc; 482 483 argc = *argcp; 484 for (s = options; (p = strsep(&s, ",")) != NULL;) 485 if (*p != '\0') 486 if (*p == '-') { 487 argv[argc++] = p; 488 p = strchr(p, '='); 489 if (p) { 490 *p = '\0'; 491 argv[argc++] = p+1; 492 } 493 } else if (strcmp(p, "rw") != 0) { 494 argv[argc++] = "-o"; 495 argv[argc++] = p; 496 } 497 498 *argcp = argc; 499 } 500 501 void 502 usage() 503 { 504 505 (void)fprintf(stderr, 506 "usage: mount %s %s\n mount %s\n mount %s\n", 507 "[-dfruvw] [-o options] [-t ufs | external_type]", 508 "special node", 509 "[-adfruvw] [-t ufs | external_type]", 510 "[-dfruvw] special | node"); 511 exit(1); 512 } 513