1 /* 2 * pfsck --- A generic, parallelizing front-end for the fsck program. 3 * It will automatically try to run fsck programs in parallel if the 4 * devices are on separate spindles. It is based on the same ideas as 5 * the generic front end for fsck by David Engel and Fred van Kempen, 6 * but it has been completely rewritten from scratch to support 7 * parallel execution. 8 * 9 * Written by Theodore Ts'o, <tytso (at) mit.edu> 10 * 11 * Miquel van Smoorenburg (miquels (at) drinkel.ow.org) 20-Oct-1994: 12 * o Changed -t fstype to behave like with mount when -A (all file 13 * systems) or -M (like mount) is specified. 14 * o fsck looks if it can find the fsck.type program to decide 15 * if it should ignore the fs type. This way more fsck programs 16 * can be added without changing this front-end. 17 * o -R flag skip root file system. 18 * 19 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 20 * 2001, 2002, 2003, 2004, 2005 by Theodore Ts'o. 21 * 22 * %Begin-Header% 23 * This file may be redistributed under the terms of the GNU Public 24 * License. 25 * %End-Header% 26 */ 27 28 #define _XOPEN_SOURCE 600 /* for inclusion of sa_handler in Solaris */ 29 30 #include <sys/types.h> 31 #include <sys/wait.h> 32 #include <sys/stat.h> 33 #include <limits.h> 34 #include <stdio.h> 35 #include <ctype.h> 36 #include <string.h> 37 #include <time.h> 38 #if HAVE_STDLIB_H 39 #include <stdlib.h> 40 #endif 41 #if HAVE_ERRNO_H 42 #include <errno.h> 43 #endif 44 #if HAVE_PATHS_H 45 #include <paths.h> 46 #endif 47 #if HAVE_UNISTD_H 48 #include <unistd.h> 49 #endif 50 #if HAVE_ERRNO_H 51 #include <errno.h> 52 #endif 53 #if HAVE_MALLOC_H 54 #include <malloc.h> 55 #endif 56 #ifdef HAVE_SIGNAL_H 57 #include <signal.h> 58 #endif 59 60 #include "../version.h" 61 #include "nls-enable.h" 62 #include "fsck.h" 63 #include "blkid/blkid.h" 64 65 #ifndef _PATH_MNTTAB 66 #define _PATH_MNTTAB "/etc/fstab" 67 #endif 68 69 static const char *ignored_types[] = { 70 "ignore", 71 "iso9660", 72 "nfs", 73 "proc", 74 "sw", 75 "swap", 76 "tmpfs", 77 "devpts", 78 NULL 79 }; 80 81 static const char *really_wanted[] = { 82 "minix", 83 "ext2", 84 "ext3", 85 "ext4", 86 "ext4dev", 87 "jfs", 88 "reiserfs", 89 "xiafs", 90 "xfs", 91 NULL 92 }; 93 94 #define BASE_MD "/dev/md" 95 96 /* 97 * Global variables for options 98 */ 99 static char *devices[MAX_DEVICES]; 100 static char *args[MAX_ARGS]; 101 static int num_devices, num_args; 102 103 static int verbose = 0; 104 static int doall = 0; 105 static int noexecute = 0; 106 static int serialize = 0; 107 static int skip_root = 0; 108 static int ignore_mounted = 0; 109 static int notitle = 0; 110 static int parallel_root = 0; 111 static int progress = 0; 112 static int progress_fd = 0; 113 static int force_all_parallel = 0; 114 static int num_running = 0; 115 static int max_running = 0; 116 static volatile int cancel_requested = 0; 117 static int kill_sent = 0; 118 static char *progname; 119 static char *fstype = NULL; 120 static struct fs_info *filesys_info = NULL, *filesys_last = NULL; 121 static struct fsck_instance *instance_list; 122 static const char *fsck_prefix_path = "/sbin:/sbin/fs.d:/sbin/fs:/etc/fs:/etc"; 123 static char *fsck_path = 0; 124 static blkid_cache cache = NULL; 125 126 static char *string_copy(const char *s) 127 { 128 char *ret; 129 130 if (!s) 131 return 0; 132 ret = malloc(strlen(s)+1); 133 if (ret) 134 strcpy(ret, s); 135 return ret; 136 } 137 138 static int string_to_int(const char *s) 139 { 140 long l; 141 char *p; 142 143 l = strtol(s, &p, 0); 144 if (*p || l == LONG_MIN || l == LONG_MAX || l < 0 || l > INT_MAX) 145 return -1; 146 else 147 return (int) l; 148 } 149 150 static int ignore(struct fs_info *); 151 152 static char *skip_over_blank(char *cp) 153 { 154 while (*cp && isspace(*cp)) 155 cp++; 156 return cp; 157 } 158 159 static char *skip_over_word(char *cp) 160 { 161 while (*cp && !isspace(*cp)) 162 cp++; 163 return cp; 164 } 165 166 static void strip_line(char *line) 167 { 168 char *p; 169 170 while (*line) { 171 p = line + strlen(line) - 1; 172 if ((*p == '\n') || (*p == '\r')) 173 *p = 0; 174 else 175 break; 176 } 177 } 178 179 static char *parse_word(char **buf) 180 { 181 char *word, *next; 182 183 word = *buf; 184 if (*word == 0) 185 return 0; 186 187 word = skip_over_blank(word); 188 next = skip_over_word(word); 189 if (*next) 190 *next++ = 0; 191 *buf = next; 192 return word; 193 } 194 195 static void parse_escape(char *word) 196 { 197 char *p, *q; 198 int ac, i; 199 200 if (!word) 201 return; 202 203 for (p = word, q = word; *p; p++, q++) { 204 *q = *p; 205 if (*p != '\\') 206 continue; 207 if (*++p == 0) 208 break; 209 if (*p == 't') { 210 *q = '\t'; 211 continue; 212 } 213 if (*p == 'n') { 214 *q = '\n'; 215 continue; 216 } 217 if (!isdigit(*p)) { 218 *q = *p; 219 continue; 220 } 221 ac = 0; 222 for (i = 0; i < 3; i++, p++) { 223 if (!isdigit(*p)) 224 break; 225 ac = (ac * 8) + (*p - '0'); 226 } 227 *q = ac; 228 p--; 229 } 230 *q = 0; 231 } 232 233 static void free_instance(struct fsck_instance *i) 234 { 235 free(i->prog); 236 free(i->device); 237 free(i->base_device); 238 free(i); 239 return; 240 } 241 242 static struct fs_info *create_fs_device(const char *device, const char *mntpnt, 243 const char *type, const char *opts, 244 int freq, int passno) 245 { 246 struct fs_info *fs; 247 248 if (!(fs = malloc(sizeof(struct fs_info)))) 249 return NULL; 250 251 fs->device = string_copy(device); 252 fs->mountpt = string_copy(mntpnt); 253 fs->type = string_copy(type); 254 fs->opts = string_copy(opts ? opts : ""); 255 fs->freq = freq; 256 fs->passno = passno; 257 fs->flags = 0; 258 fs->next = NULL; 259 260 if (!filesys_info) 261 filesys_info = fs; 262 else 263 filesys_last->next = fs; 264 filesys_last = fs; 265 266 return fs; 267 } 268 269 270 271 static int parse_fstab_line(char *line, struct fs_info **ret_fs) 272 { 273 char *dev, *device, *mntpnt, *type, *opts, *freq, *passno, *cp; 274 struct fs_info *fs; 275 276 *ret_fs = 0; 277 strip_line(line); 278 cp = line; 279 280 device = parse_word(&cp); 281 if (!device || *device == '#') 282 return 0; /* Ignore blank lines and comments */ 283 mntpnt = parse_word(&cp); 284 type = parse_word(&cp); 285 opts = parse_word(&cp); 286 freq = parse_word(&cp); 287 passno = parse_word(&cp); 288 289 if (!mntpnt || !type) 290 return -1; 291 292 parse_escape(device); 293 parse_escape(mntpnt); 294 parse_escape(type); 295 parse_escape(opts); 296 parse_escape(freq); 297 parse_escape(passno); 298 299 dev = blkid_get_devname(cache, device, NULL); 300 if (dev) 301 device = dev; 302 303 if (strchr(type, ',')) 304 type = 0; 305 306 fs = create_fs_device(device, mntpnt, type ? type : "auto", opts, 307 freq ? atoi(freq) : -1, 308 passno ? atoi(passno) : -1); 309 free(dev); 310 311 if (!fs) 312 return -1; 313 *ret_fs = fs; 314 return 0; 315 } 316 317 static void interpret_type(struct fs_info *fs) 318 { 319 char *t; 320 321 if (strcmp(fs->type, "auto") != 0) 322 return; 323 t = blkid_get_tag_value(cache, "TYPE", fs->device); 324 if (t) { 325 free(fs->type); 326 fs->type = t; 327 } 328 } 329 330 /* 331 * Load the filesystem database from /etc/fstab 332 */ 333 static void load_fs_info(const char *filename) 334 { 335 FILE *f; 336 char buf[1024]; 337 int lineno = 0; 338 int old_fstab = 1; 339 struct fs_info *fs; 340 341 if ((f = fopen(filename, "r")) == NULL) { 342 fprintf(stderr, _("WARNING: couldn't open %s: %s\n"), 343 filename, strerror(errno)); 344 return; 345 } 346 while (!feof(f)) { 347 lineno++; 348 if (!fgets(buf, sizeof(buf), f)) 349 break; 350 buf[sizeof(buf)-1] = 0; 351 if (parse_fstab_line(buf, &fs) < 0) { 352 fprintf(stderr, _("WARNING: bad format " 353 "on line %d of %s\n"), lineno, filename); 354 continue; 355 } 356 if (!fs) 357 continue; 358 if (fs->passno < 0) 359 fs->passno = 0; 360 else 361 old_fstab = 0; 362 } 363 364 fclose(f); 365 366 if (old_fstab && filesys_info) { 367 fputs("\007\007\007", stderr); 368 fputs(_( 369 "WARNING: Your /etc/fstab does not contain the fsck passno\n" 370 " field. I will kludge around things for you, but you\n" 371 " should fix your /etc/fstab file as soon as you can.\n\n"), stderr); 372 373 for (fs = filesys_info; fs; fs = fs->next) { 374 fs->passno = 1; 375 } 376 } 377 } 378 379 /* Lookup filesys in /etc/fstab and return the corresponding entry. */ 380 static struct fs_info *lookup(char *filesys) 381 { 382 struct fs_info *fs; 383 384 /* No filesys name given. */ 385 if (filesys == NULL) 386 return NULL; 387 388 for (fs = filesys_info; fs; fs = fs->next) { 389 if (!strcmp(filesys, fs->device) || 390 (fs->mountpt && !strcmp(filesys, fs->mountpt))) 391 break; 392 } 393 394 return fs; 395 } 396 397 /* Find fsck program for a given fs type. */ 398 static char *find_fsck(char *type) 399 { 400 char *s; 401 const char *tpl; 402 static char prog[256]; 403 char *p = string_copy(fsck_path); 404 struct stat st; 405 406 /* Are we looking for a program or just a type? */ 407 tpl = (strncmp(type, "fsck.", 5) ? "%s/fsck.%s" : "%s/%s"); 408 409 for(s = strtok(p, ":"); s; s = strtok(NULL, ":")) { 410 sprintf(prog, tpl, s, type); 411 if (stat(prog, &st) == 0) break; 412 } 413 free(p); 414 return(s ? prog : NULL); 415 } 416 417 static int progress_active(NOARGS) 418 { 419 struct fsck_instance *inst; 420 421 for (inst = instance_list; inst; inst = inst->next) { 422 if (inst->flags & FLAG_DONE) 423 continue; 424 if (inst->flags & FLAG_PROGRESS) 425 return 1; 426 } 427 return 0; 428 } 429 430 /* 431 * Execute a particular fsck program, and link it into the list of 432 * child processes we are waiting for. 433 */ 434 static int execute(const char *type, const char *device, const char *mntpt, 435 int interactive) 436 { 437 char *s, *argv[80], prog[80]; 438 int argc, i; 439 struct fsck_instance *inst, *p; 440 pid_t pid; 441 442 inst = malloc(sizeof(struct fsck_instance)); 443 if (!inst) 444 return ENOMEM; 445 memset(inst, 0, sizeof(struct fsck_instance)); 446 447 sprintf(prog, "fsck.%s", type); 448 argv[0] = string_copy(prog); 449 argc = 1; 450 451 for (i=0; i <num_args; i++) 452 argv[argc++] = string_copy(args[i]); 453 454 if (progress) { 455 if ((strcmp(type, "ext2") == 0) || 456 (strcmp(type, "ext3") == 0) || 457 (strcmp(type, "ext4") == 0) || 458 (strcmp(type, "ext4dev") == 0)) { 459 char tmp[80]; 460 461 tmp[0] = 0; 462 if (!progress_active()) { 463 snprintf(tmp, 80, "-C%d", progress_fd); 464 inst->flags |= FLAG_PROGRESS; 465 } else if (progress_fd) 466 snprintf(tmp, 80, "-C%d", progress_fd * -1); 467 if (tmp[0]) 468 argv[argc++] = string_copy(tmp); 469 } 470 } 471 472 argv[argc++] = string_copy(device); 473 argv[argc] = 0; 474 475 s = find_fsck(prog); 476 if (s == NULL) { 477 fprintf(stderr, _("fsck: %s: not found\n"), prog); 478 free(inst); 479 return ENOENT; 480 } 481 482 if (verbose || noexecute) { 483 printf("[%s (%d) -- %s] ", s, num_running, 484 mntpt ? mntpt : device); 485 for (i=0; i < argc; i++) 486 printf("%s ", argv[i]); 487 printf("\n"); 488 } 489 490 /* Fork and execute the correct program. */ 491 if (noexecute) 492 pid = -1; 493 else if ((pid = fork()) < 0) { 494 perror("fork"); 495 free(inst); 496 return errno; 497 } else if (pid == 0) { 498 if (!interactive) 499 close(0); 500 (void) execv(s, argv); 501 perror(argv[0]); 502 free(inst); 503 exit(EXIT_ERROR); 504 } 505 506 for (i=0; i < argc; i++) 507 free(argv[i]); 508 509 inst->pid = pid; 510 inst->prog = string_copy(prog); 511 inst->type = string_copy(type); 512 inst->device = string_copy(device); 513 inst->base_device = base_device(device); 514 inst->start_time = time(0); 515 inst->next = NULL; 516 517 /* 518 * Find the end of the list, so we add the instance on at the end. 519 */ 520 for (p = instance_list; p && p->next; p = p->next); 521 522 if (p) 523 p->next = inst; 524 else 525 instance_list = inst; 526 527 return 0; 528 } 529 530 /* 531 * Send a signal to all outstanding fsck child processes 532 */ 533 static int kill_all(int signum) 534 { 535 struct fsck_instance *inst; 536 int n = 0; 537 538 for (inst = instance_list; inst; inst = inst->next) { 539 if (inst->flags & FLAG_DONE) 540 continue; 541 kill(inst->pid, signum); 542 n++; 543 } 544 return n; 545 } 546 547 /* 548 * Wait for one child process to exit; when it does, unlink it from 549 * the list of executing child processes, and return it. 550 */ 551 static struct fsck_instance *wait_one(int flags) 552 { 553 int status; 554 int sig; 555 struct fsck_instance *inst, *inst2, *prev; 556 pid_t pid; 557 558 if (!instance_list) 559 return NULL; 560 561 if (noexecute) { 562 inst = instance_list; 563 prev = 0; 564 #ifdef RANDOM_DEBUG 565 while (inst->next && (random() & 1)) { 566 prev = inst; 567 inst = inst->next; 568 } 569 #endif 570 inst->exit_status = 0; 571 goto ret_inst; 572 } 573 574 /* 575 * gcc -Wall fails saving throw against stupidity 576 * (inst and prev are thought to be uninitialized variables) 577 */ 578 inst = prev = NULL; 579 580 do { 581 pid = waitpid(-1, &status, flags); 582 if (cancel_requested && !kill_sent) { 583 kill_all(SIGTERM); 584 kill_sent++; 585 } 586 if ((pid == 0) && (flags & WNOHANG)) 587 return NULL; 588 if (pid < 0) { 589 if ((errno == EINTR) || (errno == EAGAIN)) 590 continue; 591 if (errno == ECHILD) { 592 fprintf(stderr, 593 _("%s: wait: No more child process?!?\n"), 594 progname); 595 return NULL; 596 } 597 perror("wait"); 598 continue; 599 } 600 for (prev = 0, inst = instance_list; 601 inst; 602 prev = inst, inst = inst->next) { 603 if (inst->pid == pid) 604 break; 605 } 606 } while (!inst); 607 608 if (WIFEXITED(status)) 609 status = WEXITSTATUS(status); 610 else if (WIFSIGNALED(status)) { 611 sig = WTERMSIG(status); 612 if (sig == SIGINT) { 613 status = EXIT_UNCORRECTED; 614 } else { 615 printf(_("Warning... %s for device %s exited " 616 "with signal %d.\n"), 617 inst->prog, inst->device, sig); 618 status = EXIT_ERROR; 619 } 620 } else { 621 printf(_("%s %s: status is %x, should never happen.\n"), 622 inst->prog, inst->device, status); 623 status = EXIT_ERROR; 624 } 625 inst->exit_status = status; 626 inst->flags |= FLAG_DONE; 627 if (progress && (inst->flags & FLAG_PROGRESS) && 628 !progress_active()) { 629 for (inst2 = instance_list; inst2; inst2 = inst2->next) { 630 if (inst2->flags & FLAG_DONE) 631 continue; 632 if (strcmp(inst2->type, "ext2") && 633 strcmp(inst2->type, "ext3") && 634 strcmp(inst2->type, "ext4") && 635 strcmp(inst2->type, "ext4dev")) 636 continue; 637 /* 638 * If we've just started the fsck, wait a tiny 639 * bit before sending the kill, to give it 640 * time to set up the signal handler 641 */ 642 if (inst2->start_time < time(0)+2) { 643 if (fork() == 0) { 644 sleep(1); 645 kill(inst2->pid, SIGUSR1); 646 exit(0); 647 } 648 } else 649 kill(inst2->pid, SIGUSR1); 650 inst2->flags |= FLAG_PROGRESS; 651 break; 652 } 653 } 654 ret_inst: 655 if (prev) 656 prev->next = inst->next; 657 else 658 instance_list = inst->next; 659 if (verbose > 1) 660 printf(_("Finished with %s (exit status %d)\n"), 661 inst->device, inst->exit_status); 662 num_running--; 663 return inst; 664 } 665 666 #define FLAG_WAIT_ALL 0 667 #define FLAG_WAIT_ATLEAST_ONE 1 668 /* 669 * Wait until all executing child processes have exited; return the 670 * logical OR of all of their exit code values. 671 */ 672 static int wait_many(int flags) 673 { 674 struct fsck_instance *inst; 675 int global_status = 0; 676 int wait_flags = 0; 677 678 while ((inst = wait_one(wait_flags))) { 679 global_status |= inst->exit_status; 680 free_instance(inst); 681 #ifdef RANDOM_DEBUG 682 if (noexecute && (flags & WNOHANG) && !(random() % 3)) 683 break; 684 #endif 685 if (flags & FLAG_WAIT_ATLEAST_ONE) 686 wait_flags = WNOHANG; 687 } 688 return global_status; 689 } 690 691 /* 692 * Run the fsck program on a particular device 693 * 694 * If the type is specified using -t, and it isn't prefixed with "no" 695 * (as in "noext2") and only one filesystem type is specified, then 696 * use that type regardless of what is specified in /etc/fstab. 697 * 698 * If the type isn't specified by the user, then use either the type 699 * specified in /etc/fstab, or DEFAULT_FSTYPE. 700 */ 701 static void fsck_device(struct fs_info *fs, int interactive) 702 { 703 const char *type; 704 int retval; 705 706 interpret_type(fs); 707 708 if (strcmp(fs->type, "auto") != 0) 709 type = fs->type; 710 else if (fstype && strncmp(fstype, "no", 2) && 711 strncmp(fstype, "opts=", 5) && strncmp(fstype, "loop", 4) && 712 !strchr(fstype, ',')) 713 type = fstype; 714 else 715 type = DEFAULT_FSTYPE; 716 717 num_running++; 718 retval = execute(type, fs->device, fs->mountpt, interactive); 719 if (retval) { 720 fprintf(stderr, _("%s: Error %d while executing fsck.%s " 721 "for %s\n"), progname, retval, type, fs->device); 722 num_running--; 723 } 724 } 725 726 727 /* 728 * Deal with the fsck -t argument. 729 */ 730 static struct fs_type_compile { 731 char **list; 732 int *type; 733 int negate; 734 } fs_type_compiled; 735 736 #define FS_TYPE_NORMAL 0 737 #define FS_TYPE_OPT 1 738 #define FS_TYPE_NEGOPT 2 739 740 static const char *fs_type_syntax_error = 741 N_("Either all or none of the filesystem types passed to -t must be prefixed\n" 742 "with 'no' or '!'.\n"); 743 744 static void compile_fs_type(char *fs_type, struct fs_type_compile *cmp) 745 { 746 char *cp, *list, *s; 747 int num = 2; 748 int negate, first_negate = 1; 749 750 if (fs_type) { 751 for (cp=fs_type; *cp; cp++) { 752 if (*cp == ',') 753 num++; 754 } 755 } 756 757 cmp->list = malloc(num * sizeof(char *)); 758 cmp->type = malloc(num * sizeof(int)); 759 if (!cmp->list || !cmp->type) { 760 fputs(_("Couldn't allocate memory for filesystem types\n"), 761 stderr); 762 exit(EXIT_ERROR); 763 } 764 memset(cmp->list, 0, num * sizeof(char *)); 765 memset(cmp->type, 0, num * sizeof(int)); 766 cmp->negate = 0; 767 768 if (!fs_type) 769 return; 770 771 list = string_copy(fs_type); 772 num = 0; 773 s = strtok(list, ","); 774 while(s) { 775 negate = 0; 776 if (strncmp(s, "no", 2) == 0) { 777 s += 2; 778 negate = 1; 779 } else if (*s == '!') { 780 s++; 781 negate = 1; 782 } 783 if (strcmp(s, "loop") == 0) 784 /* loop is really short-hand for opts=loop */ 785 goto loop_special_case; 786 else if (strncmp(s, "opts=", 5) == 0) { 787 s += 5; 788 loop_special_case: 789 cmp->type[num] = negate ? FS_TYPE_NEGOPT : FS_TYPE_OPT; 790 } else { 791 if (first_negate) { 792 cmp->negate = negate; 793 first_negate = 0; 794 } 795 if ((negate && !cmp->negate) || 796 (!negate && cmp->negate)) { 797 fputs(_(fs_type_syntax_error), stderr); 798 exit(EXIT_USAGE); 799 } 800 } 801 #if 0 802 printf("Adding %s to list (type %d).\n", s, cmp->type[num]); 803 #endif 804 cmp->list[num++] = string_copy(s); 805 s = strtok(NULL, ","); 806 } 807 free(list); 808 } 809 810 /* 811 * This function returns true if a particular option appears in a 812 * comma-delimited options list 813 */ 814 static int opt_in_list(const char *opt, char *optlist) 815 { 816 char *list, *s; 817 818 if (!optlist) 819 return 0; 820 list = string_copy(optlist); 821 822 s = strtok(list, ","); 823 while(s) { 824 if (strcmp(s, opt) == 0) { 825 free(list); 826 return 1; 827 } 828 s = strtok(NULL, ","); 829 } 830 free(list); 831 return 0; 832 } 833 834 /* See if the filesystem matches the criteria given by the -t option */ 835 static int fs_match(struct fs_info *fs, struct fs_type_compile *cmp) 836 { 837 int n, ret = 0, checked_type = 0; 838 char *cp; 839 840 if (cmp->list == 0 || cmp->list[0] == 0) 841 return 1; 842 843 for (n=0; (cp = cmp->list[n]); n++) { 844 switch (cmp->type[n]) { 845 case FS_TYPE_NORMAL: 846 checked_type++; 847 if (strcmp(cp, fs->type) == 0) { 848 ret = 1; 849 } 850 break; 851 case FS_TYPE_NEGOPT: 852 if (opt_in_list(cp, fs->opts)) 853 return 0; 854 break; 855 case FS_TYPE_OPT: 856 if (!opt_in_list(cp, fs->opts)) 857 return 0; 858 break; 859 } 860 } 861 if (checked_type == 0) 862 return 1; 863 return (cmp->negate ? !ret : ret); 864 } 865 866 /* Check if we should ignore this filesystem. */ 867 static int ignore(struct fs_info *fs) 868 { 869 const char **ip; 870 int wanted = 0; 871 872 /* 873 * If the pass number is 0, ignore it. 874 */ 875 if (fs->passno == 0) 876 return 1; 877 878 /* 879 * If this is a bind mount, ignore it. 880 */ 881 if (opt_in_list("bind", fs->opts)) { 882 fprintf(stderr, 883 _("%s: skipping bad line in /etc/fstab: bind mount with nonzero fsck pass number\n"), 884 fs->mountpt); 885 return 1; 886 } 887 888 interpret_type(fs); 889 890 /* 891 * If a specific fstype is specified, and it doesn't match, 892 * ignore it. 893 */ 894 if (!fs_match(fs, &fs_type_compiled)) return 1; 895 896 /* Are we ignoring this type? */ 897 for(ip = ignored_types; *ip; ip++) 898 if (strcmp(fs->type, *ip) == 0) return 1; 899 900 /* Do we really really want to check this fs? */ 901 for(ip = really_wanted; *ip; ip++) 902 if (strcmp(fs->type, *ip) == 0) { 903 wanted = 1; 904 break; 905 } 906 907 /* See if the <fsck.fs> program is available. */ 908 if (find_fsck(fs->type) == NULL) { 909 if (wanted) 910 fprintf(stderr, _("fsck: cannot check %s: fsck.%s not found\n"), 911 fs->device, fs->type); 912 return 1; 913 } 914 915 /* We can and want to check this file system type. */ 916 return 0; 917 } 918 919 /* 920 * Returns TRUE if a partition on the same disk is already being 921 * checked. 922 */ 923 static int device_already_active(char *device) 924 { 925 struct fsck_instance *inst; 926 char *base; 927 928 if (force_all_parallel) 929 return 0; 930 931 #ifdef BASE_MD 932 /* Don't check a soft raid disk with any other disk */ 933 if (instance_list && 934 (!strncmp(instance_list->device, BASE_MD, sizeof(BASE_MD)-1) || 935 !strncmp(device, BASE_MD, sizeof(BASE_MD)-1))) 936 return 1; 937 #endif 938 939 base = base_device(device); 940 /* 941 * If we don't know the base device, assume that the device is 942 * already active if there are any fsck instances running. 943 */ 944 if (!base) 945 return (instance_list != 0); 946 for (inst = instance_list; inst; inst = inst->next) { 947 if (!inst->base_device || !strcmp(base, inst->base_device)) { 948 free(base); 949 return 1; 950 } 951 } 952 free(base); 953 return 0; 954 } 955 956 /* Check all file systems, using the /etc/fstab table. */ 957 static int check_all(NOARGS) 958 { 959 struct fs_info *fs = NULL; 960 int status = EXIT_OK; 961 int not_done_yet = 1; 962 int passno = 1; 963 int pass_done; 964 965 if (verbose) 966 fputs(_("Checking all file systems.\n"), stdout); 967 968 /* 969 * Do an initial scan over the filesystem; mark filesystems 970 * which should be ignored as done, and resolve any "auto" 971 * filesystem types (done as a side-effect of calling ignore()). 972 */ 973 for (fs = filesys_info; fs; fs = fs->next) { 974 if (ignore(fs)) 975 fs->flags |= FLAG_DONE; 976 } 977 978 /* 979 * Find and check the root filesystem. 980 */ 981 if (!parallel_root) { 982 for (fs = filesys_info; fs; fs = fs->next) { 983 if (!strcmp(fs->mountpt, "/")) 984 break; 985 } 986 if (fs) { 987 if (!skip_root && !ignore(fs) && 988 !(ignore_mounted && is_mounted(fs->device))) { 989 fsck_device(fs, 1); 990 status |= wait_many(FLAG_WAIT_ALL); 991 if (status > EXIT_NONDESTRUCT) 992 return status; 993 } 994 fs->flags |= FLAG_DONE; 995 } 996 } 997 /* 998 * This is for the bone-headed user who enters the root 999 * filesystem twice. Skip root will skep all root entries. 1000 */ 1001 if (skip_root) 1002 for (fs = filesys_info; fs; fs = fs->next) 1003 if (!strcmp(fs->mountpt, "/")) 1004 fs->flags |= FLAG_DONE; 1005 1006 while (not_done_yet) { 1007 not_done_yet = 0; 1008 pass_done = 1; 1009 1010 for (fs = filesys_info; fs; fs = fs->next) { 1011 if (cancel_requested) 1012 break; 1013 if (fs->flags & FLAG_DONE) 1014 continue; 1015 /* 1016 * If the filesystem's pass number is higher 1017 * than the current pass number, then we don't 1018 * do it yet. 1019 */ 1020 if (fs->passno > passno) { 1021 not_done_yet++; 1022 continue; 1023 } 1024 if (ignore_mounted && is_mounted(fs->device)) { 1025 fs->flags |= FLAG_DONE; 1026 continue; 1027 } 1028 /* 1029 * If a filesystem on a particular device has 1030 * already been spawned, then we need to defer 1031 * this to another pass. 1032 */ 1033 if (device_already_active(fs->device)) { 1034 pass_done = 0; 1035 continue; 1036 } 1037 /* 1038 * Spawn off the fsck process 1039 */ 1040 fsck_device(fs, serialize); 1041 fs->flags |= FLAG_DONE; 1042 1043 /* 1044 * Only do one filesystem at a time, or if we 1045 * have a limit on the number of fsck's extant 1046 * at one time, apply that limit. 1047 */ 1048 if (serialize || 1049 (max_running && (num_running >= max_running))) { 1050 pass_done = 0; 1051 break; 1052 } 1053 } 1054 if (cancel_requested) 1055 break; 1056 if (verbose > 1) 1057 printf(_("--waiting-- (pass %d)\n"), passno); 1058 status |= wait_many(pass_done ? FLAG_WAIT_ALL : 1059 FLAG_WAIT_ATLEAST_ONE); 1060 if (pass_done) { 1061 if (verbose > 1) 1062 printf("----------------------------------\n"); 1063 passno++; 1064 } else 1065 not_done_yet++; 1066 } 1067 if (cancel_requested && !kill_sent) { 1068 kill_all(SIGTERM); 1069 kill_sent++; 1070 } 1071 status |= wait_many(FLAG_WAIT_ATLEAST_ONE); 1072 return status; 1073 } 1074 1075 static void usage(NOARGS) 1076 { 1077 fputs(_("Usage: fsck [-AMNPRTV] [ -C [ fd ] ] [-t fstype] [fs-options] [filesys ...]\n"), stderr); 1078 exit(EXIT_USAGE); 1079 } 1080 1081 #ifdef HAVE_SIGNAL_H 1082 static void signal_cancel(int sig FSCK_ATTR((unused))) 1083 { 1084 cancel_requested++; 1085 } 1086 #endif 1087 1088 static void PRS(int argc, char *argv[]) 1089 { 1090 int i, j; 1091 char *arg, *dev, *tmp = 0; 1092 char options[128]; 1093 int opt = 0; 1094 int opts_for_fsck = 0; 1095 #ifdef HAVE_SIGNAL_H 1096 struct sigaction sa; 1097 1098 /* 1099 * Set up signal action 1100 */ 1101 memset(&sa, 0, sizeof(struct sigaction)); 1102 sa.sa_handler = signal_cancel; 1103 sigaction(SIGINT, &sa, 0); 1104 sigaction(SIGTERM, &sa, 0); 1105 #endif 1106 1107 num_devices = 0; 1108 num_args = 0; 1109 instance_list = 0; 1110 1111 progname = argv[0]; 1112 1113 for (i=1; i < argc; i++) { 1114 arg = argv[i]; 1115 if (!arg) 1116 continue; 1117 if ((arg[0] == '/' && !opts_for_fsck) || strchr(arg, '=')) { 1118 if (num_devices >= MAX_DEVICES) { 1119 fprintf(stderr, _("%s: too many devices\n"), 1120 progname); 1121 exit(EXIT_ERROR); 1122 } 1123 dev = blkid_get_devname(cache, arg, NULL); 1124 if (!dev && strchr(arg, '=')) { 1125 /* 1126 * Check to see if we failed because 1127 * /proc/partitions isn't found. 1128 */ 1129 if (access("/proc/partitions", R_OK) < 0) { 1130 fprintf(stderr, "Couldn't open /proc/partitions: %s\n", 1131 strerror(errno)); 1132 fprintf(stderr, "Is /proc mounted?\n"); 1133 exit(EXIT_ERROR); 1134 } 1135 /* 1136 * Check to see if this is because 1137 * we're not running as root 1138 */ 1139 if (geteuid()) 1140 fprintf(stderr, 1141 "Must be root to scan for matching filesystems: %s\n", arg); 1142 else 1143 fprintf(stderr, 1144 "Couldn't find matching filesystem: %s\n", arg); 1145 exit(EXIT_ERROR); 1146 } 1147 devices[num_devices++] = dev ? dev : string_copy(arg); 1148 continue; 1149 } 1150 if (arg[0] != '-' || opts_for_fsck) { 1151 if (num_args >= MAX_ARGS) { 1152 fprintf(stderr, _("%s: too many arguments\n"), 1153 progname); 1154 exit(EXIT_ERROR); 1155 } 1156 args[num_args++] = string_copy(arg); 1157 continue; 1158 } 1159 for (j=1; arg[j]; j++) { 1160 if (opts_for_fsck) { 1161 options[++opt] = arg[j]; 1162 continue; 1163 } 1164 switch (arg[j]) { 1165 case 'A': 1166 doall++; 1167 break; 1168 case 'C': 1169 progress++; 1170 if (arg[j+1]) { 1171 progress_fd = string_to_int(arg+j+1); 1172 if (progress_fd < 0) 1173 progress_fd = 0; 1174 else 1175 goto next_arg; 1176 } else if ((i+1) < argc && 1177 !strncmp(argv[i+1], "-", 1) == 0) { 1178 progress_fd = string_to_int(argv[i]); 1179 if (progress_fd < 0) 1180 progress_fd = 0; 1181 else { 1182 ++i; 1183 goto next_arg; 1184 } 1185 } 1186 break; 1187 case 'V': 1188 verbose++; 1189 break; 1190 case 'N': 1191 noexecute++; 1192 break; 1193 case 'R': 1194 skip_root++; 1195 break; 1196 case 'T': 1197 notitle++; 1198 break; 1199 case 'M': 1200 ignore_mounted++; 1201 break; 1202 case 'P': 1203 parallel_root++; 1204 break; 1205 case 's': 1206 serialize++; 1207 break; 1208 case 't': 1209 tmp = 0; 1210 if (fstype) 1211 usage(); 1212 if (arg[j+1]) 1213 tmp = arg+j+1; 1214 else if ((i+1) < argc) 1215 tmp = argv[++i]; 1216 else 1217 usage(); 1218 fstype = string_copy(tmp); 1219 compile_fs_type(fstype, &fs_type_compiled); 1220 goto next_arg; 1221 case '-': 1222 opts_for_fsck++; 1223 break; 1224 case '?': 1225 usage(); 1226 break; 1227 default: 1228 options[++opt] = arg[j]; 1229 break; 1230 } 1231 } 1232 next_arg: 1233 if (opt) { 1234 options[0] = '-'; 1235 options[++opt] = '\0'; 1236 if (num_args >= MAX_ARGS) { 1237 fprintf(stderr, 1238 _("%s: too many arguments\n"), 1239 progname); 1240 exit(EXIT_ERROR); 1241 } 1242 args[num_args++] = string_copy(options); 1243 opt = 0; 1244 } 1245 } 1246 if (getenv("FSCK_FORCE_ALL_PARALLEL")) 1247 force_all_parallel++; 1248 if ((tmp = getenv("FSCK_MAX_INST"))) 1249 max_running = atoi(tmp); 1250 } 1251 1252 int main(int argc, char *argv[]) 1253 { 1254 int i, status = 0; 1255 int interactive = 0; 1256 char *oldpath = getenv("PATH"); 1257 const char *fstab; 1258 struct fs_info *fs; 1259 1260 setvbuf(stdout, NULL, _IONBF, BUFSIZ); 1261 setvbuf(stderr, NULL, _IONBF, BUFSIZ); 1262 1263 #ifdef ENABLE_NLS 1264 setlocale(LC_MESSAGES, ""); 1265 setlocale(LC_CTYPE, ""); 1266 bindtextdomain(NLS_CAT_NAME, LOCALEDIR); 1267 textdomain(NLS_CAT_NAME); 1268 #endif 1269 blkid_get_cache(&cache, NULL); 1270 PRS(argc, argv); 1271 1272 if (!notitle) 1273 printf("fsck %s (%s)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE); 1274 1275 fstab = getenv("FSTAB_FILE"); 1276 if (!fstab) 1277 fstab = _PATH_MNTTAB; 1278 load_fs_info(fstab); 1279 1280 /* Update our search path to include uncommon directories. */ 1281 if (oldpath) { 1282 fsck_path = malloc (strlen (fsck_prefix_path) + 1 + 1283 strlen (oldpath) + 1); 1284 if (!fsck_path) { 1285 fprintf(stderr, "%s: Unable to allocate memory for fsck_path\n", progname); 1286 exit(EXIT_ERROR); 1287 } 1288 strcpy (fsck_path, fsck_prefix_path); 1289 strcat (fsck_path, ":"); 1290 strcat (fsck_path, oldpath); 1291 } else { 1292 fsck_path = string_copy(fsck_prefix_path); 1293 } 1294 1295 if ((num_devices == 1) || (serialize)) 1296 interactive = 1; 1297 1298 /* If -A was specified ("check all"), do that! */ 1299 if (doall) 1300 return check_all(); 1301 1302 if (num_devices == 0) { 1303 serialize++; 1304 interactive++; 1305 return check_all(); 1306 } 1307 for (i = 0 ; i < num_devices; i++) { 1308 if (cancel_requested) { 1309 if (!kill_sent) { 1310 kill_all(SIGTERM); 1311 kill_sent++; 1312 } 1313 break; 1314 } 1315 fs = lookup(devices[i]); 1316 if (!fs) { 1317 fs = create_fs_device(devices[i], 0, "auto", 1318 0, -1, -1); 1319 if (!fs) 1320 continue; 1321 } 1322 if (ignore_mounted && is_mounted(fs->device)) 1323 continue; 1324 fsck_device(fs, interactive); 1325 if (serialize || 1326 (max_running && (num_running >= max_running))) { 1327 struct fsck_instance *inst; 1328 1329 inst = wait_one(0); 1330 if (inst) { 1331 status |= inst->exit_status; 1332 free_instance(inst); 1333 } 1334 if (verbose > 1) 1335 printf("----------------------------------\n"); 1336 } 1337 } 1338 status |= wait_many(FLAG_WAIT_ALL); 1339 free(fsck_path); 1340 blkid_put_cache(cache); 1341 return status; 1342 } 1343
