1 /* $NetBSD: fsck.c,v 1.21 1999/04/22 04:20:53 abs Exp $ */ 2 3 /* 4 * Copyright (c) 1996 Christos Zoulas. All rights reserved. 5 * Copyright (c) 1980, 1989, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * From: @(#)mount.c 8.19 (Berkeley) 4/19/94 37 * From: $NetBSD: mount.c,v 1.24 1995/11/18 03:34:29 cgd Exp 38 * $NetBSD: fsck.c,v 1.21 1999/04/22 04:20:53 abs Exp $ 39 */ 40 41 #include <sys/cdefs.h> 42 __FBSDID("$FreeBSD$"); 43 44 #include <sys/param.h> 45 #include <sys/mount.h> 46 #include <sys/queue.h> 47 #include <sys/wait.h> 48 #define FSTYPENAMES 49 #define DKTYPENAMES 50 #include <sys/disklabel.h> 51 #include <sys/ioctl.h> 52 53 #include <ctype.h> 54 #include <err.h> 55 #include <errno.h> 56 #include <fstab.h> 57 #include <fcntl.h> 58 #include <paths.h> 59 #include <signal.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 65 #include "pathnames.h" 66 #include "fsutil.h" 67 68 static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST; 69 70 TAILQ_HEAD(fstypelist, entry) opthead, selhead; 71 72 struct entry { 73 char *type; 74 char *options; 75 TAILQ_ENTRY(entry) entries; 76 }; 77 78 static char *options = NULL; 79 static int flags = 0; 80 static int forceflag = 0; 81 82 static int checkfs(const char *, const char *, const char *, char *, pid_t *); 83 static int selected(const char *); 84 static void addoption(char *); 85 static const char *getoptions(const char *); 86 static void addentry(struct fstypelist *, const char *, const char *); 87 static void maketypelist(char *); 88 static void catopt(char **, const char *); 89 static void mangle(char *, int *, const char ***, int *); 90 static const char *getfslab(const char *); 91 static void usage(void) __dead2; 92 static int isok(struct fstab *); 93 94 int 95 main(int argc, char *argv[]) 96 { 97 struct fstab *fs; 98 int i, rval = 0; 99 const char *vfstype = NULL; 100 char globopt[3]; 101 102 globopt[0] = '-'; 103 globopt[2] = '\0'; 104 105 TAILQ_INIT(&selhead); 106 TAILQ_INIT(&opthead); 107 108 while ((i = getopt(argc, argv, "BdvpfFnyl:t:T:")) != -1) 109 switch (i) { 110 case 'B': 111 if (flags & CHECK_BACKGRD) 112 errx(1, "Cannot specify -B and -F."); 113 flags |= DO_BACKGRD; 114 break; 115 116 case 'd': 117 flags |= CHECK_DEBUG; 118 break; 119 120 case 'v': 121 flags |= CHECK_VERBOSE; 122 break; 123 124 case 'F': 125 if (flags & DO_BACKGRD) 126 errx(1, "Cannot specify -B and -F."); 127 flags |= CHECK_BACKGRD; 128 break; 129 130 case 'p': 131 flags |= CHECK_PREEN; 132 /*FALLTHROUGH*/ 133 case 'n': 134 case 'y': 135 globopt[1] = i; 136 catopt(&options, globopt); 137 break; 138 139 case 'f': 140 forceflag = 1; 141 globopt[1] = i; 142 catopt(&options, globopt); 143 break; 144 145 case 'l': 146 warnx("Ignoring obsolete -l option\n"); 147 break; 148 149 case 'T': 150 if (*optarg) 151 addoption(optarg); 152 break; 153 154 case 't': 155 if (!TAILQ_EMPTY(&selhead)) 156 errx(1, "only one -t option may be specified."); 157 158 maketypelist(optarg); 159 vfstype = optarg; 160 break; 161 162 case '?': 163 default: 164 usage(); 165 /* NOTREACHED */ 166 } 167 168 argc -= optind; 169 argv += optind; 170 171 if (argc == 0) 172 return checkfstab(flags, isok, checkfs); 173 174 #define BADTYPE(type) \ 175 (strcmp(type, FSTAB_RO) && \ 176 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 177 178 179 for (; argc--; argv++) { 180 const char *spec, *mntpt, *type, *cp; 181 char device[MAXPATHLEN]; 182 struct statfs *mntp; 183 184 spec = *argv; 185 cp = strrchr(spec, '/'); 186 if (cp == 0) { 187 (void)snprintf(device, sizeof(device), "%s%s", 188 _PATH_DEV, spec); 189 spec = device; 190 } 191 mntp = getmntpt(spec); 192 if (mntp != NULL) { 193 spec = mntp->f_mntfromname; 194 mntpt = mntp->f_mntonname; 195 } 196 if ((fs = getfsfile(spec)) == NULL && 197 (fs = getfsspec(spec)) == NULL) { 198 if (vfstype == NULL) 199 vfstype = getfslab(spec); 200 type = vfstype; 201 devcheck(spec); 202 } else { 203 spec = fs->fs_spec; 204 type = fs->fs_vfstype; 205 mntpt = fs->fs_file; 206 if (BADTYPE(fs->fs_type)) 207 errx(1, "%s has unknown file system type.", 208 spec); 209 } 210 if ((flags & CHECK_BACKGRD) && 211 checkfs(type, spec, mntpt, "-F", NULL) == 0) { 212 printf("%s: DEFER FOR BACKGROUND CHECKING\n", *argv); 213 continue; 214 } 215 if ((flags & DO_BACKGRD) && forceflag == 0 && 216 checkfs(type, spec, mntpt, "-F", NULL) != 0) 217 continue; 218 219 rval |= checkfs(type, spec, mntpt, NULL, NULL); 220 } 221 222 return rval; 223 } 224 225 226 static int 227 isok(struct fstab *fs) 228 { 229 int i; 230 231 if (fs->fs_passno == 0) 232 return (0); 233 if (BADTYPE(fs->fs_type)) 234 return (0); 235 if (!selected(fs->fs_vfstype)) 236 return (0); 237 /* 238 * If the -B flag has been given, then process the needed 239 * background checks. Background checks cannot be run on 240 * filesystems that will be mounted read-only or that were 241 * not mounted at boot time (typically those marked `noauto'). 242 * If these basic tests are passed, check with the filesystem 243 * itself to see if it is willing to do background checking 244 * by invoking its check program with the -F flag. 245 */ 246 if (flags & DO_BACKGRD) { 247 if (!strcmp(fs->fs_type, FSTAB_RO)) 248 return (0); 249 if (getmntpt(fs->fs_spec) == NULL) 250 return (0); 251 if (checkfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, "-F", 0)) 252 return (0); 253 return (1); 254 } 255 /* 256 * If the -F flag has been given, then consider deferring the 257 * check to background. Background checks cannot be run on 258 * filesystems that will be mounted read-only or that will 259 * not be mounted at boot time (e.g., marked `noauto'). If 260 * these basic tests are passed, check with the filesystem 261 * itself to see if it is willing to defer to background 262 * checking by invoking its check program with the -F flag. 263 */ 264 if ((flags & CHECK_BACKGRD) == 0 || !strcmp(fs->fs_type, FSTAB_RO)) 265 return (1); 266 for (i = strlen(fs->fs_mntops) - 6; i >= 0; i--) 267 if (!strncmp(&fs->fs_mntops[i], "noauto", 6)) 268 break; 269 if (i >= 0) 270 return (1); 271 if (checkfs(fs->fs_vfstype, fs->fs_spec, fs->fs_file, "-F", NULL) != 0) 272 return (1); 273 printf("%s: DEFER FOR BACKGROUND CHECKING\n", fs->fs_spec); 274 return (0); 275 } 276 277 278 static int 279 checkfs(const char *pvfstype, const char *spec, const char *mntpt, 280 char *auxopt, pid_t *pidp) 281 { 282 /* List of directories containing fsck_xxx subcommands. */ 283 static const char *edirs[] = { 284 _PATH_SBIN, 285 _PATH_USRSBIN, 286 NULL 287 }; 288 const char **argv, **edir; 289 pid_t pid; 290 int argc, i, status, maxargc; 291 char *optbuf, execname[MAXPATHLEN + 1], execbase[MAXPATHLEN]; 292 char *vfstype = NULL; 293 const char *extra = NULL; 294 295 #ifdef __GNUC__ 296 /* Avoid vfork clobbering */ 297 (void) &optbuf; 298 (void) &vfstype; 299 #endif 300 /* 301 * We convert the vfstype to lowercase and any spaces to underscores 302 * to not confuse the issue 303 */ 304 vfstype = strdup(pvfstype); 305 if (vfstype == NULL) 306 perror("strdup(pvfstype)"); 307 for (i = 0; i < strlen(vfstype); i++) { 308 vfstype[i] = tolower(vfstype[i]); 309 if (vfstype[i] == ' ') 310 vfstype[i] = '_'; 311 } 312 313 extra = getoptions(vfstype); 314 optbuf = NULL; 315 if (options) 316 catopt(&optbuf, options); 317 if (extra) 318 catopt(&optbuf, extra); 319 if (auxopt) 320 catopt(&optbuf, auxopt); 321 else if (flags & DO_BACKGRD) 322 catopt(&optbuf, "-B"); 323 324 maxargc = 64; 325 argv = emalloc(sizeof(char *) * maxargc); 326 327 (void) snprintf(execbase, sizeof(execbase), "fsck_%s", vfstype); 328 argc = 0; 329 argv[argc++] = execbase; 330 if (optbuf) 331 mangle(optbuf, &argc, &argv, &maxargc); 332 argv[argc++] = spec; 333 argv[argc] = NULL; 334 335 if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) { 336 (void)printf("start %s %swait", mntpt, 337 pidp ? "no" : ""); 338 for (i = 0; i < argc; i++) 339 (void)printf(" %s", argv[i]); 340 (void)printf("\n"); 341 } 342 343 switch (pid = vfork()) { 344 case -1: /* Error. */ 345 warn("vfork"); 346 if (optbuf) 347 free(optbuf); 348 free(vfstype); 349 return (1); 350 351 case 0: /* Child. */ 352 if ((flags & CHECK_DEBUG) && auxopt == NULL) 353 _exit(0); 354 355 /* Go find an executable. */ 356 edir = edirs; 357 do { 358 (void)snprintf(execname, 359 sizeof(execname), "%s/%s", *edir, execbase); 360 execv(execname, (char * const *)argv); 361 if (errno != ENOENT) { 362 if (spec) 363 warn("exec %s for %s", execname, spec); 364 else 365 warn("exec %s", execname); 366 } 367 } while (*++edir != NULL); 368 369 if (errno == ENOENT) { 370 if (spec) 371 warn("exec %s for %s", execname, spec); 372 else 373 warn("exec %s", execname); 374 } 375 _exit(1); 376 /* NOTREACHED */ 377 378 default: /* Parent. */ 379 if (optbuf) 380 free(optbuf); 381 382 free(vfstype); 383 384 if (pidp) { 385 *pidp = pid; 386 return 0; 387 } 388 389 if (waitpid(pid, &status, 0) < 0) { 390 warn("waitpid"); 391 return (1); 392 } 393 394 if (WIFEXITED(status)) { 395 if (WEXITSTATUS(status) != 0) 396 return (WEXITSTATUS(status)); 397 } 398 else if (WIFSIGNALED(status)) { 399 warnx("%s: %s", spec, strsignal(WTERMSIG(status))); 400 return (1); 401 } 402 break; 403 } 404 405 return (0); 406 } 407 408 409 static int 410 selected(const char *type) 411 { 412 struct entry *e; 413 414 /* If no type specified, it's always selected. */ 415 TAILQ_FOREACH(e, &selhead, entries) 416 if (!strncmp(e->type, type, MFSNAMELEN)) 417 return which == IN_LIST ? 1 : 0; 418 419 return which == IN_LIST ? 0 : 1; 420 } 421 422 423 static const char * 424 getoptions(const char *type) 425 { 426 struct entry *e; 427 428 TAILQ_FOREACH(e, &opthead, entries) 429 if (!strncmp(e->type, type, MFSNAMELEN)) 430 return e->options; 431 return ""; 432 } 433 434 435 static void 436 addoption(char *optstr) 437 { 438 char *newoptions; 439 struct entry *e; 440 441 if ((newoptions = strchr(optstr, ':')) == NULL) 442 errx(1, "Invalid option string"); 443 444 *newoptions++ = '\0'; 445 446 TAILQ_FOREACH(e, &opthead, entries) 447 if (!strncmp(e->type, optstr, MFSNAMELEN)) { 448 catopt(&e->options, newoptions); 449 return; 450 } 451 addentry(&opthead, optstr, newoptions); 452 } 453 454 455 static void 456 addentry(struct fstypelist *list, const char *type, const char *opts) 457 { 458 struct entry *e; 459 460 e = emalloc(sizeof(struct entry)); 461 e->type = estrdup(type); 462 e->options = estrdup(opts); 463 TAILQ_INSERT_TAIL(list, e, entries); 464 } 465 466 467 static void 468 maketypelist(char *fslist) 469 { 470 char *ptr; 471 472 if ((fslist == NULL) || (fslist[0] == '\0')) 473 errx(1, "empty type list"); 474 475 if (fslist[0] == 'n' && fslist[1] == 'o') { 476 fslist += 2; 477 which = NOT_IN_LIST; 478 } 479 else 480 which = IN_LIST; 481 482 while ((ptr = strsep(&fslist, ",")) != NULL) 483 addentry(&selhead, ptr, ""); 484 485 } 486 487 488 static void 489 catopt(char **sp, const char *o) 490 { 491 char *s; 492 size_t i, j; 493 494 s = *sp; 495 if (s) { 496 i = strlen(s); 497 j = i + 1 + strlen(o) + 1; 498 s = erealloc(s, j); 499 (void)snprintf(s + i, j, ",%s", o); 500 } else 501 s = estrdup(o); 502 *sp = s; 503 } 504 505 506 static void 507 mangle(char *options, int *argcp, const char ***argvp, int *maxargcp) 508 { 509 char *p, *s; 510 int argc, maxargc; 511 const char **argv; 512 513 argc = *argcp; 514 argv = *argvp; 515 maxargc = *maxargcp; 516 517 for (s = options; (p = strsep(&s, ",")) != NULL;) { 518 /* Always leave space for one more argument and the NULL. */ 519 if (argc >= maxargc - 3) { 520 maxargc <<= 1; 521 argv = erealloc(argv, maxargc * sizeof(char *)); 522 } 523 if (*p != '\0') { 524 if (*p == '-') { 525 argv[argc++] = p; 526 p = strchr(p, '='); 527 if (p) { 528 *p = '\0'; 529 argv[argc++] = p+1; 530 } 531 } else { 532 argv[argc++] = "-o"; 533 argv[argc++] = p; 534 } 535 } 536 } 537 538 *argcp = argc; 539 *argvp = argv; 540 *maxargcp = maxargc; 541 } 542 543 544 const static char * 545 getfslab(const char *str) 546 { 547 struct disklabel dl; 548 int fd; 549 char p; 550 const char *vfstype; 551 u_char t; 552 553 /* deduce the filesystem type from the disk label */ 554 if ((fd = open(str, O_RDONLY)) == -1) 555 err(1, "cannot open `%s'", str); 556 557 if (ioctl(fd, DIOCGDINFO, &dl) == -1) 558 err(1, "cannot get disklabel for `%s'", str); 559 560 (void) close(fd); 561 562 p = str[strlen(str) - 1]; 563 564 if ((p - 'a') >= dl.d_npartitions) 565 errx(1, "partition `%s' is not defined on disk", str); 566 567 if ((t = dl.d_partitions[p - 'a'].p_fstype) >= FSMAXTYPES) 568 errx(1, "partition `%s' is not of a legal vfstype", 569 str); 570 571 if ((vfstype = fstypenames[t]) == NULL) 572 errx(1, "vfstype `%s' on partition `%s' is not supported", 573 fstypenames[t], str); 574 575 return vfstype; 576 } 577 578 579 static void 580 usage(void) 581 { 582 static const char common[] = 583 "[-BFdpvlyn] [-T fstype:fsoptions] [-t fstype]"; 584 585 (void)fprintf(stderr, "Usage: %s %s [special|node]...\n", 586 getprogname(), common); 587 exit(1); 588 } 589