fsck.c revision 1.51
1 /* $NetBSD: fsck.c,v 1.51 2012/04/07 04:52:20 christos 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. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * From: @(#)mount.c 8.19 (Berkeley) 4/19/94 33 * From: NetBSD: mount.c,v 1.24 1995/11/18 03:34:29 cgd Exp 34 * 35 */ 36 37 #include <sys/cdefs.h> 38 #ifndef lint 39 __RCSID("$NetBSD: fsck.c,v 1.51 2012/04/07 04:52:20 christos Exp $"); 40 #endif /* not lint */ 41 42 #include <sys/param.h> 43 #include <sys/mount.h> 44 #include <sys/queue.h> 45 #include <sys/wait.h> 46 #define FSTYPENAMES 47 #define FSCKNAMES 48 #include <sys/disk.h> 49 #include <sys/disklabel.h> 50 #include <sys/ioctl.h> 51 52 #include <err.h> 53 #include <errno.h> 54 #include <fstab.h> 55 #include <fcntl.h> 56 #include <paths.h> 57 #include <signal.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 #include <util.h> 63 64 #include "pathnames.h" 65 #include "fsutil.h" 66 #include "exitvalues.h" 67 68 static enum { IN_LIST, NOT_IN_LIST } which = NOT_IN_LIST; 69 70 TAILQ_HEAD(fstypelist, entry) opthead, selhead, omhead; 71 72 struct entry { 73 char *type; 74 char *options; 75 TAILQ_ENTRY(entry) entries; 76 }; 77 78 static int maxrun = 0; 79 static char *options = NULL; 80 static int flags = 0; 81 82 static int checkfs(const char *, const char *, const char *, void *, pid_t *); 83 static int selected(const char *); 84 static int omitted(const char *); 85 static void addoption(char *); 86 static const char *getoptions(const char *); 87 static void addentry(struct fstypelist *, const char *, const char *); 88 static void maketypelist(char *); 89 static void catopt(char **, const char *); 90 static void mangle(char *, int *, const char ** volatile *, int *); 91 static const char *getfslab(const char *); 92 __dead static void usage(void); 93 static void *isok(struct fstab *); 94 95 int 96 main(int argc, char *argv[]) 97 { 98 struct fstab *fs; 99 int i, rval; 100 const char *vfstype = NULL; 101 char globopt[3]; 102 int ret = FSCK_EXIT_OK; 103 char buf[MAXPATHLEN]; 104 105 globopt[0] = '-'; 106 globopt[2] = '\0'; 107 108 TAILQ_INIT(&selhead); 109 TAILQ_INIT(&opthead); 110 TAILQ_INIT(&omhead); 111 112 while ((i = getopt(argc, argv, "dfl:nPpqT:t:vx:y")) != -1) { 113 switch (i) { 114 case 'd': 115 flags |= CHECK_DEBUG; 116 continue; 117 118 case 'f': 119 flags |= CHECK_FORCE; 120 break; 121 122 case 'n': 123 flags |= CHECK_NOFIX; 124 break; 125 126 case 'p': 127 flags |= CHECK_PREEN; 128 break; 129 130 case 'P': 131 flags |= CHECK_PROGRESS; 132 break; 133 134 case 'q': 135 break; 136 137 case 'l': 138 maxrun = atoi(optarg); 139 continue; 140 141 case 'T': 142 if (*optarg) 143 addoption(optarg); 144 continue; 145 146 case 't': 147 if (TAILQ_FIRST(&selhead) != NULL) 148 errx(1, "only one -t option may be specified."); 149 150 maketypelist(optarg); 151 vfstype = optarg; 152 continue; 153 154 case 'v': 155 flags |= CHECK_VERBOSE; 156 continue; 157 158 case 'x': 159 addentry(&omhead, optarg, ""); 160 continue; 161 162 case 'y': 163 break; 164 165 case '?': 166 default: 167 usage(); 168 /* NOTREACHED */ 169 } 170 171 /* Pass option to fsck_xxxfs */ 172 globopt[1] = i; 173 catopt(&options, globopt); 174 } 175 176 /* Don't do progress meters if we're debugging. */ 177 if (flags & CHECK_DEBUG) 178 flags &= ~CHECK_PROGRESS; 179 180 /* 181 * If progress meters are being used, force max parallel to 1 182 * so the progress meter outputs don't interfere with one another. 183 */ 184 if (flags & CHECK_PROGRESS) 185 maxrun = 1; 186 187 argc -= optind; 188 argv += optind; 189 190 if (argc == 0) 191 return checkfstab(flags, maxrun, isok, checkfs); 192 193 #define BADTYPE(type) \ 194 (strcmp(type, FSTAB_RO) && \ 195 strcmp(type, FSTAB_RW) && strcmp(type, FSTAB_RQ)) 196 197 198 for (; argc--; argv++) { 199 const char *spec, *type, *cp; 200 char device[MAXPATHLEN]; 201 202 spec = *argv; 203 cp = strrchr(spec, '/'); 204 if (cp == 0) { 205 (void)snprintf(device, sizeof(device), "%s%s", 206 _PATH_DEV, spec); 207 spec = device; 208 } 209 if ((fs = getfsfile(spec)) == NULL && 210 (fs = getfsspec(spec)) == NULL) { 211 if (vfstype == NULL) 212 vfstype = getfslab(spec); 213 type = vfstype; 214 } 215 else { 216 spec = getfsspecname(buf, sizeof(buf), fs->fs_spec); 217 if (spec == NULL) 218 err(FSCK_EXIT_CHECK_FAILED, "%s", buf); 219 type = fs->fs_vfstype; 220 if (BADTYPE(fs->fs_type)) 221 errx(FSCK_EXIT_CHECK_FAILED, 222 "%s has unknown file system type.", 223 spec); 224 } 225 226 rval = checkfs(type, blockcheck(spec), *argv, NULL, NULL); 227 if (rval > ret) 228 ret = rval; 229 } 230 231 return ret; 232 } 233 234 235 static void * 236 isok(struct fstab *fs) 237 { 238 239 if (fs->fs_passno == 0) 240 return NULL; 241 242 if (BADTYPE(fs->fs_type)) 243 return NULL; 244 245 if (!selected(fs->fs_vfstype)) 246 return NULL; 247 248 if (omitted(fs->fs_file)) 249 return NULL; 250 251 return fs; 252 } 253 254 255 static int 256 checkfs(const char *vfst, const char *spec, const char *mntpt, void *auxarg, 257 pid_t *pidp) 258 { 259 /* List of directories containing fsck_xxx subcommands. */ 260 static const char *edirs[] = { 261 #ifdef RESCUEDIR 262 RESCUEDIR, 263 #endif 264 _PATH_SBIN, 265 _PATH_USRSBIN, 266 NULL 267 }; 268 const char ** volatile argv, **edir; 269 const char * volatile vfstype = vfst; 270 pid_t pid; 271 int argc, i, status, maxargc; 272 char *optb; 273 char *volatile optbuf; 274 char execname[MAXPATHLEN + 1], execbase[MAXPATHLEN]; 275 const char *extra = getoptions(vfstype); 276 277 if (!strcmp(vfstype, "ufs")) 278 vfstype = MOUNT_UFS; 279 280 optb = NULL; 281 if (options) 282 catopt(&optb, options); 283 if (extra) 284 catopt(&optb, extra); 285 optbuf = optb; 286 287 maxargc = 64; 288 argv = emalloc(sizeof(char *) * maxargc); 289 290 (void) snprintf(execbase, sizeof(execbase), "fsck_%s", vfstype); 291 argc = 0; 292 argv[argc++] = execbase; 293 if (optbuf) 294 mangle(optbuf, &argc, &argv, &maxargc); 295 argv[argc++] = spec; 296 argv[argc] = NULL; 297 298 if (flags & (CHECK_DEBUG|CHECK_VERBOSE)) { 299 (void)printf("start %s %swait", mntpt, 300 pidp ? "no" : ""); 301 for (i = 0; i < argc; i++) 302 (void)printf(" %s", argv[i]); 303 (void)printf("\n"); 304 } 305 306 switch (pid = vfork()) { 307 case -1: /* Error. */ 308 warn("vfork"); 309 if (optbuf) 310 free(optbuf); 311 free(argv); 312 return FSCK_EXIT_CHECK_FAILED; 313 314 case 0: /* Child. */ 315 if ((flags & CHECK_FORCE) == 0) { 316 struct statvfs sfs; 317 318 /* 319 * if mntpt is a mountpoint of a mounted file 320 * system and it's mounted read-write, skip it 321 * unless -f is given. 322 */ 323 if ((statvfs(mntpt, &sfs) == 0) && 324 (strcmp(mntpt, sfs.f_mntonname) == 0) && 325 ((sfs.f_flag & MNT_RDONLY) == 0)) { 326 printf( 327 "%s: file system is mounted read-write on %s; not checking\n", 328 spec, mntpt); 329 if ((flags & CHECK_PREEN) && auxarg != NULL) 330 _exit(FSCK_EXIT_OK); /* fsck -p */ 331 else 332 _exit(FSCK_EXIT_CHECK_FAILED); /* fsck [[-p] ...] */ 333 } 334 } 335 336 if (flags & CHECK_DEBUG) 337 _exit(FSCK_EXIT_OK); 338 339 /* Go find an executable. */ 340 edir = edirs; 341 do { 342 (void)snprintf(execname, 343 sizeof(execname), "%s/%s", *edir, execbase); 344 execv(execname, (char * const *)__UNCONST(argv)); 345 if (errno != ENOENT) { 346 if (spec) 347 warn("exec %s for %s", execname, spec); 348 else 349 warn("exec %s", execname); 350 } 351 } while (*++edir != NULL); 352 353 if (errno == ENOENT) { 354 if (spec) 355 warn("exec %s for %s", execname, spec); 356 else 357 warn("exec %s", execname); 358 } 359 _exit(FSCK_EXIT_CHECK_FAILED); 360 /* NOTREACHED */ 361 362 default: /* Parent. */ 363 if (optbuf) 364 free(optbuf); 365 free(argv); 366 367 if (pidp) { 368 *pidp = pid; 369 return FSCK_EXIT_OK; 370 } 371 372 if (waitpid(pid, &status, 0) < 0) { 373 warn("waitpid"); 374 return FSCK_EXIT_CHECK_FAILED; 375 } 376 377 if (WIFEXITED(status)) { 378 if (WEXITSTATUS(status) != 0) 379 return WEXITSTATUS(status); 380 } 381 else if (WIFSIGNALED(status)) { 382 warnx("%s: %s", spec, strsignal(WTERMSIG(status))); 383 return FSCK_EXIT_CHECK_FAILED; 384 } 385 break; 386 } 387 388 return FSCK_EXIT_OK; 389 } 390 391 392 static int 393 selected(const char *type) 394 { 395 struct entry *e; 396 397 /* If no type specified, it's always selected. */ 398 TAILQ_FOREACH(e, &selhead, entries) 399 if (!strcmp(e->type, type)) 400 return which == IN_LIST ? 1 : 0; 401 402 return which == IN_LIST ? 0 : 1; 403 } 404 405 406 static int 407 omitted(const char *mountedon) 408 { 409 struct entry *e; 410 411 /* If no type specified, it's always selected. */ 412 TAILQ_FOREACH(e, &omhead, entries) 413 if (!strcmp(e->type, mountedon)) 414 return 1; 415 416 return 0; 417 } 418 419 420 static const char * 421 getoptions(const char *type) 422 { 423 struct entry *e; 424 425 TAILQ_FOREACH(e, &opthead, entries) 426 if (!strcmp(e->type, type)) 427 return e->options; 428 return ""; 429 } 430 431 432 static void 433 addoption(char *optstr) 434 { 435 char *newoptions; 436 struct entry *e; 437 438 if ((newoptions = strchr(optstr, ':')) == NULL) 439 errx(1, "Invalid option string"); 440 441 *newoptions++ = '\0'; 442 443 TAILQ_FOREACH(e, &opthead, entries) 444 if (!strcmp(e->type, optstr)) { 445 catopt(&e->options, newoptions); 446 return; 447 } 448 addentry(&opthead, optstr, newoptions); 449 } 450 451 452 static void 453 addentry(struct fstypelist *list, const char *type, const char *opts) 454 { 455 struct entry *e; 456 457 e = emalloc(sizeof(struct entry)); 458 e->type = estrdup(type); 459 e->options = estrdup(opts); 460 TAILQ_INSERT_TAIL(list, e, entries); 461 } 462 463 464 static void 465 maketypelist(char *fslist) 466 { 467 char *ptr; 468 469 if ((fslist == NULL) || (fslist[0] == '\0')) 470 errx(1, "empty type list"); 471 472 if (fslist[0] == 'n' && fslist[1] == 'o') { 473 fslist += 2; 474 which = NOT_IN_LIST; 475 } 476 else 477 which = IN_LIST; 478 479 while ((ptr = strsep(&fslist, ",")) != NULL) 480 addentry(&selhead, ptr, ""); 481 482 } 483 484 485 static void 486 catopt(char **sp, const char *o) 487 { 488 char *s; 489 size_t i, j; 490 491 s = *sp; 492 if (s) { 493 i = strlen(s); 494 j = i + 1 + strlen(o) + 1; 495 s = erealloc(s, j); 496 (void)snprintf(s + i, j, ",%s", o); 497 } else 498 s = estrdup(o); 499 *sp = s; 500 } 501 502 503 static void 504 mangle(char *opts, int *argcp, const char ** volatile *argvp, int *maxargcp) 505 { 506 char *p, *s; 507 int argc, maxargc; 508 const char **argv; 509 510 argc = *argcp; 511 argv = *argvp; 512 maxargc = *maxargcp; 513 514 for (s = opts; (p = strsep(&s, ",")) != NULL;) { 515 /* Always leave space for one more argument and the NULL. */ 516 if (argc >= maxargc - 3) { 517 maxargc <<= 1; 518 argv = erealloc(argv, maxargc * sizeof(char *)); 519 } 520 if (*p != '\0') { 521 if (*p == '-') { 522 argv[argc++] = p; 523 p = strchr(p, '='); 524 if (p) { 525 *p = '\0'; 526 argv[argc++] = p+1; 527 } 528 } else { 529 argv[argc++] = "-o"; 530 argv[argc++] = p; 531 } 532 } 533 } 534 535 *argcp = argc; 536 *argvp = argv; 537 *maxargcp = maxargc; 538 } 539 540 static const char * 541 getfslab(const char *str) 542 { 543 static struct dkwedge_info dkw; 544 struct disklabel dl; 545 int fd; 546 char p; 547 const char *vfstype; 548 u_char t; 549 550 /* deduce the file system type from the disk label */ 551 if ((fd = open(str, O_RDONLY)) == -1) 552 err(1, "cannot open `%s'", str); 553 554 /* First check to see if it's a wedge. */ 555 if (ioctl(fd, DIOCGWEDGEINFO, &dkw) == 0) { 556 /* Yup, this is easy. */ 557 (void) close(fd); 558 return (dkw.dkw_ptype); 559 } 560 561 if (ioctl(fd, DIOCGDINFO, &dl) == -1) 562 err(1, "cannot get disklabel for `%s'", str); 563 564 (void) close(fd); 565 566 p = str[strlen(str) - 1]; 567 568 if ((p - 'a') >= dl.d_npartitions) 569 errx(1, "partition `%s' is not defined on disk", str); 570 571 if ((t = dl.d_partitions[p - 'a'].p_fstype) >= FSMAXTYPES) 572 errx(1, "partition `%s' is not of a legal vfstype", 573 str); 574 575 if ((vfstype = fscknames[t]) == NULL) 576 errx(1, "vfstype `%s' on partition `%s' is not supported", 577 fstypenames[t], str); 578 579 return vfstype; 580 } 581 582 583 static void 584 usage(void) 585 { 586 static const char common[] = 587 "[-dfnPpqvy] [-x excludemount] [-l maxparallel] [-T fstype:fsoptions]\n\t\t[-t fstype]"; 588 589 (void)fprintf(stderr, "usage: %s %s [special|node]...\n", 590 getprogname(), common); 591 exit(FSCK_EXIT_USAGE); 592 } 593
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