1 /* 2 * Copyright (c) 1980, 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char copyright[] = 10 "@(#) Copyright (c) 1980, 1989, 1993, 1994\n\ 11 The Regents of the University of California. All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)mount.c 8.17 (Berkeley) 03/31/94"; 16 #endif /* not lint */ 17 18 #include <sys/param.h> 19 #include <sys/mount.h> 20 #include <sys/wait.h> 21 22 #include <err.h> 23 #include <errno.h> 24 #include <fstab.h> 25 #include <signal.h> 26 #include <stdio.h> 27 #include <stdlib.h> 28 #include <string.h> 29 #include <unistd.h> 30 31 #include "pathnames.h" 32 33 int debug, verbose, skipvfs; 34 35 int badvfsname __P((const char *, const char **)); 36 int badvfstype __P((int, const char **)); 37 char *catopt __P((char *, const char *)); 38 struct statfs 39 *getmntpt __P((const char *)); 40 const char 41 **makevfslist __P((char *)); 42 void mangle __P((char *, int *, const char **)); 43 int mountfs __P((const char *, const char *, const char *, 44 int, const char *, const char *)); 45 void prmount __P((const char *, const char *, int)); 46 void usage __P((void)); 47 48 /* From mount_ufs.c. */ 49 int mount_ufs __P((int, char * const *)); 50 51 /* Map from mount otions to printable formats. */ 52 static struct opt { 53 int o_opt; 54 const char *o_name; 55 } optnames[] = { 56 { MNT_ASYNC, "asynchronous" }, 57 { MNT_EXPORTED, "NFS exported" }, 58 { MNT_LOCAL, "local" }, 59 { MNT_NODEV, "nodev" }, 60 { MNT_NOEXEC, "noexec" }, 61 { MNT_NOSUID, "nosuid" }, 62 { MNT_QUOTA, "with quotas" }, 63 { MNT_RDONLY, "read-only" }, 64 { MNT_SYNCHRONOUS, "synchronous" }, 65 { MNT_UNION, "union" }, 66 { MNT_USER, "user mount" }, 67 { NULL } 68 }; 69 70 int 71 main(argc, argv) 72 int argc; 73 char * const argv[]; 74 { 75 const char *mntonname, **vfslist, *vfstype; 76 struct fstab *fs; 77 struct statfs *mntbuf; 78 FILE *mountdfp; 79 pid_t pid; 80 int all, ch, i, init_flags, mntsize, rval; 81 char *options; 82 83 all = init_flags = 0; 84 options = NULL; 85 vfslist = NULL; 86 vfstype = "ufs"; 87 while ((ch = getopt(argc, argv, "adfo:rwt:uv")) != EOF) 88 switch (ch) { 89 case 'a': 90 all = 1; 91 break; 92 case 'd': 93 debug = 1; 94 break; 95 case 'f': 96 init_flags |= MNT_FORCE; 97 break; 98 case 'o': 99 if (*optarg) 100 options = catopt(options, optarg); 101 break; 102 case 'r': 103 init_flags |= MNT_RDONLY; 104 break; 105 case 't': 106 if (vfslist != NULL) 107 errx(1, "only one -t option may be specified."); 108 vfslist = makevfslist(optarg); 109 vfstype = optarg; 110 break; 111 case 'u': 112 init_flags |= MNT_UPDATE; 113 break; 114 case 'v': 115 verbose = 1; 116 break; 117 case 'w': 118 init_flags &= ~MNT_RDONLY; 119 break; 120 case '?': 121 default: 122 usage(); 123 /* NOTREACHED */ 124 } 125 argc -= optind; 126 argv += optind; 127 128 #define BADTYPE(type) \ 129 (strcmp(type, FSTAB_RO) && \ 130 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 131 132 rval = 0; 133 switch (argc) { 134 case 0: 135 if (all) 136 while ((fs = getfsent()) != NULL) { 137 if (BADTYPE(fs->fs_type)) 138 continue; 139 if (badvfsname(fs->fs_vfstype, vfslist)) 140 continue; 141 if (mountfs(fs->fs_vfstype, fs->fs_spec, 142 fs->fs_file, init_flags, options, 143 fs->fs_mntops)) 144 rval = 1; 145 } 146 else { 147 if (verbose) { 148 usage(); 149 /* NOTREACHED */ 150 } 151 152 if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0) 153 err(1, "getmntinfo"); 154 for (i = 0; i < mntsize; i++) { 155 if (badvfstype(mntbuf[i].f_type, vfslist)) 156 continue; 157 prmount(mntbuf[i].f_mntfromname, 158 mntbuf[i].f_mntonname, mntbuf[i].f_flags); 159 } 160 } 161 exit(rval); 162 case 1: 163 if (vfslist != NULL) { 164 usage(); 165 /* NOTREACHED */ 166 } 167 168 if (init_flags & MNT_UPDATE) { 169 if ((mntbuf = getmntpt(*argv)) == NULL) 170 errx(1, 171 "unknown special file or file system %s.", 172 *argv); 173 if ((fs = getfsfile(mntbuf->f_mntonname)) == NULL) 174 errx(1, "can't find fstab entry for %s.", 175 *argv); 176 mntonname = mntbuf->f_mntonname; 177 } else { 178 if ((fs = getfsfile(*argv)) == NULL && 179 (fs = getfsspec(*argv)) == NULL) 180 errx(1, 181 "%s: unknown special file or file system.", 182 *argv); 183 if (BADTYPE(fs->fs_type)) 184 errx(1, "%s has unknown file system type.", 185 *argv); 186 mntonname = fs->fs_file; 187 } 188 rval = mountfs(fs->fs_vfstype, fs->fs_spec, 189 mntonname, init_flags, options, fs->fs_mntops); 190 break; 191 case 2: 192 /* 193 * If -t flag has not been specified, and spec contains either 194 * a ':' or a '@' then assume that an NFS filesystem is being 195 * specified ala Sun. 196 */ 197 if (vfslist == NULL && 198 (strchr(argv[0], ':') != NULL || 199 strchr(argv[0], '@') != NULL)) 200 vfstype = "nfs"; 201 rval = mountfs(vfstype, 202 argv[0], argv[1], init_flags, options, NULL); 203 break; 204 default: 205 usage(); 206 /* NOTREACHED */ 207 } 208 209 /* 210 * If the mount was successfully, and done by root, tell mountd the 211 * good news. Pid checks are probably unnecessary, but don't hurt. 212 */ 213 if (rval == 0 && getuid() == 0 && 214 (mountdfp = fopen(_PATH_MOUNTDPID, "r")) != NULL) { 215 if (fscanf(mountdfp, "%ld", &pid) == 1 && 216 pid > 0 && kill(pid, SIGHUP)) 217 err(1, "signal mountd"); 218 (void)fclose(mountdfp); 219 } 220 221 exit(rval); 222 } 223 224 int 225 mountfs(vfstype, spec, name, flags, options, mntopts) 226 const char *vfstype, *spec, *name, *options, *mntopts; 227 int flags; 228 { 229 /* List of directories containing mount_xxx subcommands. */ 230 static const char *edirs[] = { 231 _PATH_SBIN, 232 _PATH_USRSBIN, 233 NULL 234 }; 235 const char *argv[100], **edir; 236 struct statfs sf; 237 pid_t pid; 238 int argc, i, status; 239 char *optbuf, execname[MAXPATHLEN + 1], mntpath[MAXPATHLEN]; 240 241 if (realpath(name, mntpath) == NULL) { 242 warn("%s", mntpath); 243 return (1); 244 } 245 246 name = mntpath; 247 248 if (options == 0) { 249 if (!mntopts || !*mntopts) 250 options = "rw"; 251 else 252 options = mntopts; 253 mntopts = ""; 254 255 } 256 optbuf = catopt(strdup(mntopts), options); 257 258 if (strcmp(name, "/") == 0) 259 flags |= MNT_UPDATE; 260 if (flags & MNT_FORCE) 261 optbuf = catopt(optbuf, "force"); 262 if (flags & MNT_RDONLY) 263 optbuf = catopt(optbuf, "ro"); 264 /* 265 * XXX 266 * The mount_mfs (newfs) command uses -o to select the 267 * optimisation mode. We don't pass the default "-o rw" 268 * for that reason. 269 */ 270 if (flags & MNT_UPDATE) 271 optbuf = catopt(optbuf, "update"); 272 273 argc = 0; 274 argv[argc++] = vfstype; 275 mangle(optbuf, &argc, argv); 276 argv[argc++] = spec; 277 argv[argc++] = name; 278 argv[argc] = NULL; 279 280 if (debug) { 281 (void)printf("exec: mount_%s", vfstype); 282 for (i = 1; i < argc; i++) 283 (void)printf(" %s", argv[i]); 284 (void)printf("\n"); 285 return (0); 286 } 287 288 switch (pid = vfork()) { 289 case -1: /* Error. */ 290 warn("vfork"); 291 free(optbuf); 292 return (1); 293 case 0: /* Child. */ 294 if (strcmp(vfstype, "ufs") == 0) 295 exit(mount_ufs(argc, (char * const *) argv)); 296 297 /* Go find an executable. */ 298 edir = edirs; 299 do { 300 (void)snprintf(execname, 301 sizeof(execname), "%s/mount_%s", *edir, vfstype); 302 execv(execname, (char * const *)argv); 303 if (errno != ENOENT) 304 warn("exec %s for %s", execname, name); 305 } while (*++edir != NULL); 306 307 if (errno == ENOENT) 308 warn("exec %s for %s", execname, name); 309 exit(1); 310 /* NOTREACHED */ 311 default: /* Parent. */ 312 free(optbuf); 313 314 if (waitpid(pid, &status, 0) < 0) { 315 warn("waitpid"); 316 return (1); 317 } 318 319 if (WIFEXITED(status)) { 320 if (WEXITSTATUS(status) != 0) 321 return (WEXITSTATUS(status)); 322 } else if (WIFSIGNALED(status)) { 323 warnx("%s: %s", name, sys_siglist[WTERMSIG(status)]); 324 return (1); 325 } 326 327 if (verbose) { 328 if (statfs(name, &sf) < 0) { 329 warn("%s", name); 330 return (1); 331 } 332 prmount(sf.f_mntfromname, sf.f_mntonname, sf.f_flags); 333 } 334 break; 335 } 336 337 return (0); 338 } 339 340 void 341 prmount(spec, name, flags) 342 const char *spec, *name; 343 int flags; 344 { 345 struct opt *o; 346 int f; 347 348 (void)printf("%s on %s", spec, name); 349 350 flags &= MNT_VISFLAGMASK; 351 for (f = 0, o = optnames; flags && o->o_opt; o++) 352 if (flags & o->o_opt) { 353 (void)printf("%s%s", !f++ ? " (" : ", ", o->o_name); 354 flags &= ~o->o_opt; 355 } 356 (void)printf(f ? ")\n" : "\n"); 357 } 358 359 struct statfs * 360 getmntpt(name) 361 const char *name; 362 { 363 struct statfs *mntbuf; 364 int i, mntsize; 365 366 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT); 367 for (i = 0; i < mntsize; i++) 368 if (strcmp(mntbuf[i].f_mntfromname, name) == 0 || 369 strcmp(mntbuf[i].f_mntonname, name) == 0) 370 return (&mntbuf[i]); 371 return (NULL); 372 } 373 374 int 375 badvfsname(vfsname, vfslist) 376 const char *vfsname; 377 const char **vfslist; 378 { 379 380 if (vfslist == NULL) 381 return (0); 382 while (*vfslist != NULL) { 383 if (strcmp(vfsname, *vfslist) == 0) 384 return (skipvfs); 385 ++vfslist; 386 } 387 return (!skipvfs); 388 } 389 390 int 391 badvfstype(vfstype, vfslist) 392 int vfstype; 393 const char **vfslist; 394 { 395 static const char *vfsnames[] = INITMOUNTNAMES; 396 397 if ((vfstype < 0) || (vfstype > MOUNT_MAXTYPE)) 398 return (0); 399 400 return (badvfsname(vfsnames[vfstype], vfslist)); 401 } 402 403 const char ** 404 makevfslist(fslist) 405 char *fslist; 406 { 407 const char **av; 408 int i; 409 char *nextcp; 410 411 if (fslist == NULL) 412 return (NULL); 413 if (fslist[0] == 'n' && fslist[1] == 'o') { 414 fslist += 2; 415 skipvfs = 1; 416 } 417 for (i = 0, nextcp = fslist; *nextcp; nextcp++) 418 if (*nextcp == ',') 419 i++; 420 if ((av = malloc((size_t)(i + 2) * sizeof(char *))) == NULL) { 421 warn(NULL); 422 return (NULL); 423 } 424 nextcp = fslist; 425 i = 0; 426 av[i++] = nextcp; 427 while ((nextcp = strchr(nextcp, ',')) != NULL) { 428 *nextcp++ = '\0'; 429 av[i++] = nextcp; 430 } 431 av[i++] = NULL; 432 return (av); 433 } 434 435 char * 436 catopt(s0, s1) 437 char *s0; 438 const char *s1; 439 { 440 size_t i; 441 char *cp; 442 443 if (s0 && *s0) { 444 i = strlen(s0) + strlen(s1) + 1 + 1; 445 if ((cp = malloc(i)) == NULL) 446 err(1, NULL); 447 (void)snprintf(cp, i, "%s,%s", s0, s1); 448 } else 449 cp = strdup(s1); 450 451 if (s0) 452 free(s0); 453 return (cp); 454 } 455 456 void 457 mangle(options, argcp, argv) 458 char *options; 459 int *argcp; 460 const char **argv; 461 { 462 char *p, *s; 463 int argc; 464 465 argc = *argcp; 466 for (s = options; (p = strsep(&s, ",")) != NULL;) 467 if (*p != '\0') 468 if (*p == '-') { 469 argv[argc++] = p; 470 p = strchr(p, '='); 471 if (p) { 472 *p = '\0'; 473 argv[argc++] = p+1; 474 } 475 } else if (strcmp(p, "rw") != 0) { 476 argv[argc++] = "-o"; 477 argv[argc++] = p; 478 } 479 480 *argcp = argc; 481 } 482 483 void 484 usage() 485 { 486 487 (void)fprintf(stderr, 488 "usage: mount %s %s\n mount %s\n mount %s\n", 489 "[-dfruvw] [-o options] [-t ufs | external_type]", 490 "special node", 491 "[-adfruvw] [-t ufs | external_type]", 492 "[-dfruvw] special | node"); 493 exit(1); 494 } 495