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 #include <sys/disklabel.h> 50 #include <sys/ioctl.h> 51 52 #include <ctype.h> 53 #include <err.h> 54 #include <errno.h> 55 #include <fstab.h> 56 #include <fcntl.h> 57 #include <paths.h> 58 #include <signal.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <unistd.h> 63 64 #include "fsutil.h" 65 66 static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST; 67 68 TAILQ_HEAD(fstypelist, entry) opthead, selhead; 69 70 struct entry { 71 char *type; 72 char *options; 73 TAILQ_ENTRY(entry) entries; 74 }; 75 76 static char *options = NULL; 77 static int flags = 0; 78 static int forceflag = 0; 79 80 static int checkfs(const char *, const char *, const char *, char *, pid_t *); 81 static int selected(const char *); 82 static void addoption(char *); 83 static const char *getoptions(const char *); 84 static void addentry(struct fstypelist *, const char *, const char *); 85 static void maketypelist(char *); 86 static void catopt(char **, const char *); 87 static void mangle(char *, int *, const char ***, int *); 88 static const char *getfslab(const char *); 89 static void usage(void) __dead2; 90 static int isok(struct fstab *); 91 92 int 93 main(int argc, char *argv[]) 94 { 95 struct fstab *fs; 96 int i, rval = 0; 97 const char *vfstype = NULL; 98 char globopt[3]; 99 100 globopt[0] = '-'; 101 globopt[2] = '\0'; 102 103 TAILQ_INIT(&selhead); 104 TAILQ_INIT(&opthead); 105 106 while ((i = getopt(argc, argv, "BdvpfFnyl:t:T:")) != -1) 107 switch (i) { 108 case 'B': 109 if (flags & CHECK_BACKGRD) 110 errx(1, "Cannot specify -B and -F."); 111 flags |= DO_BACKGRD; 112 break; 113 114 case 'd': 115 flags |= CHECK_DEBUG; 116 break; 117 118 case 'v': 119 flags |= CHECK_VERBOSE; 120 break; 121 122 case 'F': 123 if (flags & DO_BACKGRD) 124 errx(1, "Cannot specify -B and -F."); 125 flags |= CHECK_BACKGRD; 126 break; 127 128 case 'p': 129 flags |= CHECK_PREEN; 130 /*FALLTHROUGH*/ 131 case 'n': 132 case 'y': 133 globopt[1] = i; 134 catopt(&options, globopt); 135 break; 136 137 case 'f': 138 forceflag = 1; 139 globopt[1] = i; 140 catopt(&options, globopt); 141 break; 142 143 case 'l': 144 warnx("Ignoring obsolete -l option\n"); 145 break; 146 147 case 'T': 148 if (*optarg) 149 addoption(optarg); 150 break; 151 152 case 't': 153 if (!TAILQ_EMPTY(&selhead)) 154 errx(1, "only one -t option may be specified."); 155 156 maketypelist(optarg); 157 vfstype = optarg; 158 break; 159 160 case '?': 161 default: 162 usage(); 163 /* NOTREACHED */ 164 } 165 166 argc -= optind; 167 argv += optind; 168 169 if (argc == 0) 170 return checkfstab(flags, isok, checkfs); 171 172 #define BADTYPE(type) \ 173 (strcmp(type, FSTAB_RO) && \ 174 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 175 176 177 for (; argc--; argv++) { 178 const char *spec, *mntpt, *type, *cp; 179 char device[MAXPATHLEN]; 180 struct statfs *mntp; 181 182 spec = *argv; 183 cp = strrchr(spec, '/'); 184 if (cp == 0) { 185 (void)snprintf(device, sizeof(device), "%s%s", 186 _PATH_DEV, spec); 187 spec = device; 188 } 189 mntp = getmntpt(spec); 190 if (mntp != NULL) { 191 spec = mntp->f_mntfromname; 192 mntpt = mntp->f_mntonname; 193 } 194 if ((fs = getfsfile(spec)) == NULL && 195 (fs = getfsspec(spec)) == NULL) { 196 if (vfstype == NULL) 197 vfstype = getfslab(spec); 198 if (vfstype == NULL) 199 errx(1, "Could not determine filesystem type"); 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 * file systems 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 file system 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 * file systems 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 file system 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 const char **argv; 283 pid_t pid; 284 int argc, i, status, maxargc; 285 char *optbuf, execbase[MAXPATHLEN]; 286 char *vfstype = NULL; 287 const char *extra = NULL; 288 289 #ifdef __GNUC__ 290 /* Avoid vfork clobbering */ 291 (void) &optbuf; 292 (void) &vfstype; 293 #endif 294 /* 295 * We convert the vfstype to lowercase and any spaces to underscores 296 * to not confuse the issue 297 * 298 * XXX This is a kludge to make automatic filesystem type guessing 299 * from the disklabel work for "4.2BSD" filesystems. It does a 300 * very limited subset of transliteration to a normalised form of 301 * filesystem name, and we do not seem to enforce a filesystem 302 * name character set. 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 execvP(execbase, _PATH_SYSPATH, (char * const *)argv); 357 if (spec) 358 warn("exec %s for %s in %s", execbase, spec, _PATH_SYSPATH); 359 else 360 warn("exec %s in %s", execbase, _PATH_SYSPATH); 361 _exit(1); 362 /* NOTREACHED */ 363 364 default: /* Parent. */ 365 if (optbuf) 366 free(optbuf); 367 368 free(vfstype); 369 370 if (pidp) { 371 *pidp = pid; 372 return 0; 373 } 374 375 if (waitpid(pid, &status, 0) < 0) { 376 warn("waitpid"); 377 return (1); 378 } 379 380 if (WIFEXITED(status)) { 381 if (WEXITSTATUS(status) != 0) 382 return (WEXITSTATUS(status)); 383 } 384 else if (WIFSIGNALED(status)) { 385 warnx("%s: %s", spec, strsignal(WTERMSIG(status))); 386 return (1); 387 } 388 break; 389 } 390 391 return (0); 392 } 393 394 395 static int 396 selected(const char *type) 397 { 398 struct entry *e; 399 400 /* If no type specified, it's always selected. */ 401 TAILQ_FOREACH(e, &selhead, entries) 402 if (!strncmp(e->type, type, MFSNAMELEN)) 403 return which == IN_LIST ? 1 : 0; 404 405 return which == IN_LIST ? 0 : 1; 406 } 407 408 409 static const char * 410 getoptions(const char *type) 411 { 412 struct entry *e; 413 414 TAILQ_FOREACH(e, &opthead, entries) 415 if (!strncmp(e->type, type, MFSNAMELEN)) 416 return e->options; 417 return ""; 418 } 419 420 421 static void 422 addoption(char *optstr) 423 { 424 char *newoptions; 425 struct entry *e; 426 427 if ((newoptions = strchr(optstr, ':')) == NULL) 428 errx(1, "Invalid option string"); 429 430 *newoptions++ = '\0'; 431 432 TAILQ_FOREACH(e, &opthead, entries) 433 if (!strncmp(e->type, optstr, MFSNAMELEN)) { 434 catopt(&e->options, newoptions); 435 return; 436 } 437 addentry(&opthead, optstr, newoptions); 438 } 439 440 441 static void 442 addentry(struct fstypelist *list, const char *type, const char *opts) 443 { 444 struct entry *e; 445 446 e = emalloc(sizeof(struct entry)); 447 e->type = estrdup(type); 448 e->options = estrdup(opts); 449 TAILQ_INSERT_TAIL(list, e, entries); 450 } 451 452 453 static void 454 maketypelist(char *fslist) 455 { 456 char *ptr; 457 458 if ((fslist == NULL) || (fslist[0] == '\0')) 459 errx(1, "empty type list"); 460 461 if (fslist[0] == 'n' && fslist[1] == 'o') { 462 fslist += 2; 463 which = NOT_IN_LIST; 464 } 465 else 466 which = IN_LIST; 467 468 while ((ptr = strsep(&fslist, ",")) != NULL) 469 addentry(&selhead, ptr, ""); 470 471 } 472 473 474 static void 475 catopt(char **sp, const char *o) 476 { 477 char *s; 478 size_t i, j; 479 480 s = *sp; 481 if (s) { 482 i = strlen(s); 483 j = i + 1 + strlen(o) + 1; 484 s = erealloc(s, j); 485 (void)snprintf(s + i, j, ",%s", o); 486 } else 487 s = estrdup(o); 488 *sp = s; 489 } 490 491 492 static void 493 mangle(char *options, int *argcp, const char ***argvp, int *maxargcp) 494 { 495 char *p, *s; 496 int argc, maxargc; 497 const char **argv; 498 499 argc = *argcp; 500 argv = *argvp; 501 maxargc = *maxargcp; 502 503 for (s = options; (p = strsep(&s, ",")) != NULL;) { 504 /* Always leave space for one more argument and the NULL. */ 505 if (argc >= maxargc - 3) { 506 maxargc <<= 1; 507 argv = erealloc(argv, maxargc * sizeof(char *)); 508 } 509 if (*p != '\0') { 510 if (*p == '-') { 511 argv[argc++] = p; 512 p = strchr(p, '='); 513 if (p) { 514 *p = '\0'; 515 argv[argc++] = p+1; 516 } 517 } else { 518 argv[argc++] = "-o"; 519 argv[argc++] = p; 520 } 521 } 522 } 523 524 *argcp = argc; 525 *argvp = argv; 526 *maxargcp = maxargc; 527 } 528 529 530 const static char * 531 getfslab(const char *str) 532 { 533 struct disklabel dl; 534 int fd; 535 char p; 536 const char *vfstype; 537 u_char t; 538 539 /* deduce the file system type from the disk label */ 540 if ((fd = open(str, O_RDONLY)) == -1) 541 err(1, "cannot open `%s'", str); 542 543 if (ioctl(fd, DIOCGDINFO, &dl) == -1) 544 return(NULL); 545 546 (void) close(fd); 547 548 p = str[strlen(str) - 1]; 549 550 if ((p - 'a') >= dl.d_npartitions) 551 errx(1, "partition `%s' is not defined on disk", str); 552 553 if ((t = dl.d_partitions[p - 'a'].p_fstype) >= FSMAXTYPES) 554 errx(1, "partition `%s' is not of a legal vfstype", 555 str); 556 557 if ((vfstype = fstypenames[t]) == NULL) 558 errx(1, "vfstype `%s' on partition `%s' is not supported", 559 fstypenames[t], str); 560 561 return vfstype; 562 } 563 564 565 static void 566 usage(void) 567 { 568 static const char common[] = 569 "[-BFdfnpvy] [-T fstype:fsoptions] [-t fstype]"; 570 571 (void)fprintf(stderr, "usage: %s %s [special|node]...\n", 572 getprogname(), common); 573 exit(1); 574 } 575