unix.c revision 0628ae3948d5a7d0945411add9091d07ff2b3f41
1/* 2 * unix.c - The unix-specific code for e2fsck 3 * 4 * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o. 5 * 6 * %Begin-Header% 7 * This file may be redistributed under the terms of the GNU Public 8 * License. 9 * %End-Header% 10 */ 11 12#include <stdio.h> 13#ifdef HAVE_STDLIB_H 14#include <stdlib.h> 15#endif 16#include <string.h> 17#include <fcntl.h> 18#include <ctype.h> 19#include <time.h> 20#ifdef HAVE_SIGNAL_H 21#include <signal.h> 22#endif 23#ifdef HAVE_GETOPT_H 24#include <getopt.h> 25#else 26extern char *optarg; 27extern int optind; 28#endif 29#include <unistd.h> 30#ifdef HAVE_ERRNO_H 31#include <errno.h> 32#endif 33#ifdef HAVE_MNTENT_H 34#include <mntent.h> 35#endif 36#include <sys/ioctl.h> 37#include <malloc.h> 38 39#include "et/com_err.h" 40#include "e2fsck.h" 41#include "problem.h" 42#include "../version.h" 43 44/* Command line options */ 45static int blocksize = 0; 46static int swapfs = 0; 47static int normalize_swapfs = 0; 48static int cflag = 0; /* check disk */ 49static int show_version_only = 0; 50static int force = 0; 51static int verbose = 0; 52 53static int replace_bad_blocks = 0; 54static char *bad_blocks_file = 0; 55 56static int possible_block_sizes[] = { 1024, 2048, 4096, 8192, 0}; 57 58static int root_filesystem = 0; 59static int read_only_root = 0; 60 61e2fsck_t e2fsck_global_ctx; /* Try your very best not to use this! */ 62 63static void usage(e2fsck_t ctx) 64{ 65 fprintf(stderr, 66 _("Usage: %s [-panyrcdfvstFSV] [-b superblock] [-B blocksize]\n" 67 "\t\t[-I inode_buffer_blocks] [-P process_inode_size]\n" 68 "\t\t[-l|-L bad_blocks_file] [-C fd] [-j ext-journal] device\n"), 69 ctx->program_name); 70 71 fprintf(stderr, _("\nEmergency help:\n" 72 " -p Automatic repair (no questions)\n" 73 " -n Make no changes to the filesystem\n" 74 " -y Assume \"yes\" to all questions\n" 75 " -c Check for bad blocks\n" 76 " -f Force checking even if filesystem is marked clean\n")); 77 fprintf(stderr, _("" 78 " -v Be verbose\n" 79 " -b superblock Use alternative superblock\n" 80 " -B blocksize Force blocksize when looking for superblock\n" 81 " -j external-journal Set location of the external journal\n" 82 " -l bad_blocks_file Add to badblocks list\n" 83 " -L bad_blocks_file Set badblocks list\n" 84 )); 85 86 exit(FSCK_USAGE); 87} 88 89static void show_stats(e2fsck_t ctx) 90{ 91 ext2_filsys fs = ctx->fs; 92 int inodes, inodes_used, blocks, blocks_used; 93 int dir_links; 94 int num_files, num_links; 95 int frag_percent; 96 97 dir_links = 2 * ctx->fs_directory_count - 1; 98 num_files = ctx->fs_total_count - dir_links; 99 num_links = ctx->fs_links_count - dir_links; 100 inodes = fs->super->s_inodes_count; 101 inodes_used = (fs->super->s_inodes_count - 102 fs->super->s_free_inodes_count); 103 blocks = fs->super->s_blocks_count; 104 blocks_used = (fs->super->s_blocks_count - 105 fs->super->s_free_blocks_count); 106 107 frag_percent = (10000 * ctx->fs_fragmented) / inodes_used; 108 frag_percent = (frag_percent + 5) / 10; 109 110 if (!verbose) { 111 printf(_("%s: %d/%d files (%0d.%d%% non-contiguous), %d/%d blocks\n"), 112 ctx->device_name, inodes_used, inodes, 113 frag_percent / 10, frag_percent % 10, 114 blocks_used, blocks); 115 return; 116 } 117 /* 118 * This is a bit ugly. But I think there will nearly always be more 119 * than one "thing" to report about, so I won't try writing complex 120 * code to handle one/two/many forms of all words. 121 * Some languages (Italian, at least) never uses the plural form 122 * of foreign words, so in real life this could not be a problem. 123 * md@linux.it - 2000-1-15 124 */ 125#ifdef ENABLE_NLS 126 printf (_("\n%8d inodes used (%d%%)\n"), inodes_used, 127 (inodes_used != 1), 100 * inodes_used / inodes); 128 printf (_("%8d non-contiguous inodes (%0d.%d%%)\n"), 129 ctx->fs_fragmented, frag_percent / 10, frag_percent % 10); 130 printf (_(" # of inodes with ind/dind/tind blocks: %d/%d/%d\n"), 131 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count); 132 printf (_("%8d blocks used (%d%%)\n" 133 "%8d bad blocks\n"), blocks_used, 134 (int) ((long long) 100 * blocks_used / blocks), 135 ctx->fs_badblocks_count); 136 printf (_("\n%8d regular files\n" 137 "%8d directories\n" 138 "%8d character device files\n" 139 "%8d block device files\n" 140 "%8d fifos\n" 141 "%8d links\n" 142 "%8d symbolic links (%d fast symbolic links)\n" 143 "%8d sockets\n" 144 "--------\n" 145 "%8d files\n"), 146 ctx->fs_regular_count, 147 ctx->fs_directory_count, 148 ctx->fs_chardev_count, 149 ctx->fs_blockdev_count, 150 ctx->fs_fifo_count, 151 ctx->fs_links_count - dir_links, 152 ctx->fs_symlinks_count, 153 ctx->fs_fast_symlinks_count, 154 ctx->fs_sockets_count, 155 ctx->fs_total_count - dir_links); 156#else 157 printf ("\n%8d inode%s used (%d%%)\n", inodes_used, 158 (inodes_used != 1) ? "s" : "", 159 100 * inodes_used / inodes); 160 printf ("%8d non-contiguous inodes (%0d.%d%%)\n", 161 ctx->fs_fragmented, frag_percent / 10, frag_percent % 10); 162 printf (" # of inodes with ind/dind/tind blocks: %d/%d/%d\n", 163 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count); 164 printf ("%8d block%s used (%d%%)\n" 165 "%8d bad block%s\n", blocks_used, 166 (blocks_used != 1) ? "s" : "", 167 100 * blocks_used / blocks, ctx->fs_badblocks_count, 168 ctx->fs_badblocks_count != 1 ? "s" : ""); 169 printf ("\n%8d regular file%s\n" 170 "%8d director%s\n" 171 "%8d character device file%s\n" 172 "%8d block device file%s\n" 173 "%8d fifo%s\n" 174 "%8d link%s\n" 175 "%8d symbolic link%s (%d fast symbolic link%s)\n" 176 "%8d socket%s\n" 177 "--------\n" 178 "%8d file%s\n", 179 ctx->fs_regular_count, 180 (ctx->fs_regular_count != 1) ? "s" : "", 181 ctx->fs_directory_count, 182 (ctx->fs_directory_count != 1) ? "ies" : "y", 183 ctx->fs_chardev_count, 184 (ctx->fs_chardev_count != 1) ? "s" : "", 185 ctx->fs_blockdev_count, 186 (ctx->fs_blockdev_count != 1) ? "s" : "", 187 ctx->fs_fifo_count, 188 (ctx->fs_fifo_count != 1) ? "s" : "", 189 ctx->fs_links_count - dir_links, 190 ((ctx->fs_links_count - dir_links) != 1) ? "s" : "", 191 ctx->fs_symlinks_count, 192 (ctx->fs_symlinks_count != 1) ? "s" : "", 193 ctx->fs_fast_symlinks_count, 194 (ctx->fs_fast_symlinks_count != 1) ? "s" : "", 195 ctx->fs_sockets_count, (ctx->fs_sockets_count != 1) ? "s" : "", 196 ctx->fs_total_count - dir_links, 197 ((ctx->fs_total_count - dir_links) != 1) ? "s" : ""); 198#endif 199} 200 201static void check_mount(e2fsck_t ctx) 202{ 203 errcode_t retval; 204 int mount_flags, cont, fd; 205 206 retval = ext2fs_check_if_mounted(ctx->filesystem_name, &mount_flags); 207 if (retval) { 208 com_err("ext2fs_check_if_mount", retval, 209 _("while determining whether %s is mounted."), 210 ctx->filesystem_name); 211 return; 212 } 213 if (!(mount_flags & EXT2_MF_MOUNTED)) 214 return; 215 216#if (defined(__linux__) && defined(HAVE_MNTENT_H)) 217 /* 218 * If the root is mounted read-only, then /etc/mtab is 219 * probably not correct; so we won't issue a warning based on 220 * it. 221 */ 222 fd = open(MOUNTED, O_RDWR); 223 if (fd < 0) { 224 if (errno == EROFS) 225 return; 226 } else 227 close(fd); 228#endif 229 230 if (ctx->options & E2F_OPT_READONLY) { 231 printf(_("Warning! %s is mounted.\n"), ctx->filesystem_name); 232 return; 233 } 234 235 printf(_("%s is mounted. "), ctx->filesystem_name); 236 if (!isatty(0) || !isatty(1)) 237 fatal_error(ctx, _("Cannot continue, aborting.\n\n")); 238 printf(_("\n\n\007\007\007\007WARNING!!! " 239 "Running e2fsck on a mounted filesystem may cause\n" 240 "SEVERE filesystem damage.\007\007\007\n\n")); 241 cont = ask_yn(_("Do you really want to continue"), -1); 242 if (!cont) { 243 printf (_("check aborted.\n")); 244 exit (0); 245 } 246 return; 247} 248 249/* 250 * This routine checks to see if a filesystem can be skipped; if so, 251 * it will exit with E2FSCK_OK. Under some conditions it will print a 252 * message explaining why a check is being forced. 253 */ 254static void check_if_skip(e2fsck_t ctx) 255{ 256 ext2_filsys fs = ctx->fs; 257 const char *reason = NULL; 258 unsigned int reason_arg = 0; 259 260 if (force || bad_blocks_file || cflag || swapfs) 261 return; 262 263 if (fs->super->s_state & EXT2_ERROR_FS) 264 reason = _(" contains a file system with errors"); 265 else if ((fs->super->s_state & EXT2_VALID_FS) == 0) 266 reason = _(" was not cleanly unmounted"); 267 else if ((fs->super->s_max_mnt_count > 0) && 268 (fs->super->s_mnt_count >= 269 (unsigned) fs->super->s_max_mnt_count)) { 270 reason = _(" has been mounted %u times without being checked"); 271 reason_arg = fs->super->s_mnt_count; 272 } else if (fs->super->s_checkinterval && 273 time(0) >= (fs->super->s_lastcheck + 274 fs->super->s_checkinterval)) { 275 reason = _(" has gone %u days without being checked"); 276 reason_arg = (time(0) - fs->super->s_lastcheck)/(3600*24); 277 } 278 if (reason) { 279 fputs(ctx->device_name, stdout); 280 printf(reason, reason_arg); 281 fputs(_(", check forced.\n"), stdout); 282 return; 283 } 284 printf(_("%s: clean, %d/%d files, %d/%d blocks\n"), ctx->device_name, 285 fs->super->s_inodes_count - fs->super->s_free_inodes_count, 286 fs->super->s_inodes_count, 287 fs->super->s_blocks_count - fs->super->s_free_blocks_count, 288 fs->super->s_blocks_count); 289 ext2fs_close(fs); 290 ctx->fs = NULL; 291 e2fsck_free_context(ctx); 292 exit(FSCK_OK); 293} 294 295/* 296 * For completion notice 297 */ 298struct percent_tbl { 299 int max_pass; 300 int table[32]; 301}; 302struct percent_tbl e2fsck_tbl = { 303 5, { 0, 70, 90, 92, 95, 100 } 304}; 305static char bar[] = 306 "===============================================================" 307 "==============================================================="; 308static char spaces[] = 309 " " 310 " "; 311 312static float calc_percent(struct percent_tbl *tbl, int pass, int curr, 313 int max) 314{ 315 float percent; 316 317 if (pass <= 0) 318 return 0.0; 319 if (pass > tbl->max_pass || max == 0) 320 return 100.0; 321 percent = ((float) curr) / ((float) max); 322 return ((percent * (tbl->table[pass] - tbl->table[pass-1])) 323 + tbl->table[pass-1]); 324} 325 326extern void e2fsck_clear_progbar(e2fsck_t ctx) 327{ 328 if (!(ctx->flags & E2F_FLAG_PROG_BAR)) 329 return; 330 331 printf("%s\r", spaces + (sizeof(spaces) - 80)); 332 ctx->flags &= ~E2F_FLAG_PROG_BAR; 333} 334 335static int e2fsck_update_progress(e2fsck_t ctx, int pass, 336 unsigned long cur, unsigned long max) 337{ 338 static const char spinner[] = "\\|/-"; 339 char buf[80]; 340 int i; 341 float percent; 342 int tick; 343 struct timeval tv; 344 static int dpywidth = 0; 345 346 if (pass == 0) 347 return 0; 348 349 if (ctx->progress_fd) { 350 sprintf(buf, "%d %lu %lu\n", pass, cur, max); 351 write(ctx->progress_fd, buf, strlen(buf)); 352 } else { 353 if (ctx->flags & E2F_FLAG_PROG_SUPPRESS) 354 return 0; 355 if (dpywidth == 0) { 356 dpywidth = 66 - strlen(ctx->device_name); 357 dpywidth = 8 * (dpywidth / 8); 358 } 359 /* 360 * Calculate the new progress position. If the 361 * percentage hasn't changed, then we skip out right 362 * away. 363 */ 364 percent = calc_percent(&e2fsck_tbl, pass, cur, max); 365 if (ctx->progress_last_percent == (int) 10 * percent) 366 return 0; 367 ctx->progress_last_percent = (int) 10 * percent; 368 369 /* 370 * If we've already updated the spinner once within 371 * the last 1/8th of a second, no point doing it 372 * again. 373 */ 374 gettimeofday(&tv, NULL); 375 tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8)); 376 if ((tick == ctx->progress_last_time) && 377 (cur != max) && (cur != 0)) 378 return 0; 379 ctx->progress_last_time = tick; 380 381 /* 382 * Advance the spinner, and note that the progress bar 383 * will be on the screen 384 */ 385 ctx->progress_pos = (ctx->progress_pos+1) & 3; 386 ctx->flags |= E2F_FLAG_PROG_BAR; 387 388 i = ((percent * dpywidth) + 50) / 100; 389 printf("%s: |%s%s", ctx->device_name, 390 bar + (sizeof(bar) - (i+1)), 391 spaces + (sizeof(spaces) - (dpywidth - i + 1))); 392 if (percent == 100.0) 393 fputc('|', stdout); 394 else 395 fputc(spinner[ctx->progress_pos & 3], stdout); 396 printf(" %4.1f%% \r", percent); 397 if (percent == 100.0) 398 e2fsck_clear_progbar(ctx); 399 fflush(stdout); 400 } 401 return 0; 402} 403 404#define PATH_SET "PATH=/sbin" 405 406static void reserve_stdio_fds(void) 407{ 408 int fd; 409 410 while (1) { 411 fd = open("/dev/null", O_RDWR); 412 if (fd > 2) 413 break; 414 if (fd < 0) { 415 fprintf(stderr, _("ERROR: Couldn't open " 416 "/dev/null (%s)\n"), 417 strerror(errno)); 418 break; 419 } 420 } 421 close(fd); 422} 423 424#ifdef HAVE_SIGNAL_H 425static void signal_progress_on(int sig) 426{ 427 e2fsck_t ctx = e2fsck_global_ctx; 428 429 if (!ctx) 430 return; 431 432 ctx->progress = e2fsck_update_progress; 433 ctx->progress_fd = 0; 434} 435 436static void signal_progress_off(int sig) 437{ 438 e2fsck_t ctx = e2fsck_global_ctx; 439 440 if (!ctx) 441 return; 442 443 e2fsck_clear_progbar(ctx); 444 ctx->progress = 0; 445} 446#endif 447 448static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx) 449{ 450 int flush = 0; 451 int c, fd; 452#ifdef MTRACE 453 extern void *mallwatch; 454#endif 455 e2fsck_t ctx; 456 errcode_t retval; 457#ifdef HAVE_SIGNAL_H 458 struct sigaction sa; 459#endif 460 461 retval = e2fsck_allocate_context(&ctx); 462 if (retval) 463 return retval; 464 465 *ret_ctx = ctx; 466 467 setbuf(stdout, NULL); 468 setbuf(stderr, NULL); 469 initialize_ext2_error_table(); 470 471 if (argc && *argv) 472 ctx->program_name = *argv; 473 else 474 ctx->program_name = "e2fsck"; 475 while ((c = getopt (argc, argv, "panyrcC:B:dfvtFVM:b:I:j:P:l:L:N:Ss")) != EOF) 476 switch (c) { 477 case 'C': 478 ctx->progress = e2fsck_update_progress; 479 ctx->progress_fd = atoi(optarg); 480 if (!ctx->progress_fd) 481 break; 482 /* Validate the file descriptor to avoid disasters */ 483 fd = dup(ctx->progress_fd); 484 if (fd < 0) { 485 fprintf(stderr, 486 _("Error validating file descriptor %d: %s\n"), 487 ctx->progress_fd, 488 error_message(errno)); 489 fatal_error(ctx, 490 _("Invalid completion information file descriptor")); 491 } else 492 close(fd); 493 break; 494 case 'p': 495 case 'a': 496 ctx->options |= E2F_OPT_PREEN; 497 ctx->options &= ~(E2F_OPT_YES|E2F_OPT_NO); 498 break; 499 case 'n': 500 ctx->options |= E2F_OPT_NO; 501 ctx->options &= ~(E2F_OPT_YES|E2F_OPT_PREEN); 502 break; 503 case 'y': 504 ctx->options |= E2F_OPT_YES; 505 ctx->options &= ~(E2F_OPT_PREEN|E2F_OPT_NO); 506 break; 507 case 't': 508#ifdef RESOURCE_TRACK 509 if (ctx->options & E2F_OPT_TIME) 510 ctx->options |= E2F_OPT_TIME2; 511 else 512 ctx->options |= E2F_OPT_TIME; 513#else 514 fprintf(stderr, _("The -t option is not " 515 "supported on this version of e2fsck.\n")); 516#endif 517 break; 518 case 'c': 519 cflag++; 520 ctx->options |= E2F_OPT_CHECKBLOCKS; 521 break; 522 case 'r': 523 /* What we do by default, anyway! */ 524 break; 525 case 'b': 526 ctx->use_superblock = atoi(optarg); 527 break; 528 case 'B': 529 blocksize = atoi(optarg); 530 break; 531 case 'I': 532 ctx->inode_buffer_blocks = atoi(optarg); 533 break; 534 case 'j': 535 ctx->journal_name = optarg; 536 break; 537 case 'P': 538 ctx->process_inode_size = atoi(optarg); 539 break; 540 case 'L': 541 replace_bad_blocks++; 542 case 'l': 543 bad_blocks_file = (char *) malloc(strlen(optarg)+1); 544 if (!bad_blocks_file) 545 fatal_error(ctx, 546 "Couldn't malloc bad_blocks_file"); 547 strcpy(bad_blocks_file, optarg); 548 break; 549 case 'd': 550 ctx->options |= E2F_OPT_DEBUG; 551 break; 552 case 'f': 553 force = 1; 554 break; 555 case 'F': 556 flush = 1; 557 break; 558 case 'v': 559 verbose = 1; 560 break; 561 case 'V': 562 show_version_only = 1; 563 break; 564#ifdef MTRACE 565 case 'M': 566 mallwatch = (void *) strtol(optarg, NULL, 0); 567 break; 568#endif 569 case 'N': 570 ctx->device_name = optarg; 571 break; 572#ifdef ENABLE_SWAPFS 573 case 's': 574 normalize_swapfs = 1; 575 case 'S': 576 swapfs = 1; 577 break; 578#else 579 case 's': 580 case 'S': 581 fprintf(stderr, _("Byte-swapping filesystems " 582 "not compiled in this version " 583 "of e2fsck\n")); 584 exit(1); 585#endif 586 default: 587 usage(ctx); 588 } 589 if (show_version_only) 590 return 0; 591 if (optind != argc - 1) 592 usage(ctx); 593 if ((ctx->options & E2F_OPT_NO) && !bad_blocks_file && 594 !cflag && !swapfs) 595 ctx->options |= E2F_OPT_READONLY; 596 ctx->filesystem_name = argv[optind]; 597 if (flush) { 598 int fd = open(ctx->filesystem_name, O_RDONLY, 0); 599 600 if (fd < 0) { 601 com_err("open", errno, 602 _("while opening %s for flushing"), 603 ctx->filesystem_name); 604 fatal_error(ctx, 0); 605 } 606 if ((retval = ext2fs_sync_device(fd, 1))) { 607 com_err("ext2fs_sync_device", retval, 608 _("while trying to flush %s"), 609 ctx->filesystem_name); 610 fatal_error(ctx, 0); 611 } 612 close(fd); 613 } 614#ifdef ENABLE_SWAPFS 615 if (swapfs) { 616 if (cflag || bad_blocks_file) { 617 fprintf(stderr, _("Incompatible options not " 618 "allowed when byte-swapping.\n")); 619 exit(FSCK_USAGE); 620 } 621 } 622#endif 623#ifdef HAVE_SIGNAL_H 624 /* 625 * Set up signal action 626 */ 627 memset(&sa, 0, sizeof(struct sigaction)); 628#ifdef SA_RESTART 629 sa.sa_flags = SA_RESTART; 630#endif 631 e2fsck_global_ctx = ctx; 632 sa.sa_handler = signal_progress_on; 633 sigaction(SIGUSR1, &sa, 0); 634 sa.sa_handler = signal_progress_off; 635 sigaction(SIGUSR2, &sa, 0); 636#endif 637 638 /* Update our PATH to include /sbin if we need to run badblocks */ 639 if (cflag) { 640 char *oldpath = getenv("PATH"); 641 if (oldpath) { 642 char *newpath; 643 644 newpath = (char *) malloc(sizeof (PATH_SET) + 1 + 645 strlen (oldpath)); 646 if (!newpath) 647 fatal_error(ctx, "Couldn't malloc() newpath"); 648 strcpy (newpath, PATH_SET); 649 strcat (newpath, ":"); 650 strcat (newpath, oldpath); 651 putenv (newpath); 652 } else 653 putenv (PATH_SET); 654 } 655 return 0; 656} 657 658static const char *my_ver_string = E2FSPROGS_VERSION; 659static const char *my_ver_date = E2FSPROGS_DATE; 660 661int main (int argc, char *argv[]) 662{ 663 errcode_t retval = 0; 664 int exit_value = FSCK_OK; 665 int i; 666 ext2_filsys fs = 0; 667 io_manager io_ptr; 668 struct ext2_super_block *sb; 669 const char *lib_ver_date; 670 int my_ver, lib_ver; 671 e2fsck_t ctx; 672 struct problem_context pctx; 673 int flags, run_result; 674 675 clear_problem_context(&pctx); 676#ifdef MTRACE 677 mtrace(); 678#endif 679#ifdef MCHECK 680 mcheck(0); 681#endif 682#ifdef ENABLE_NLS 683 setlocale(LC_MESSAGES, ""); 684 bindtextdomain(NLS_CAT_NAME, LOCALEDIR); 685 textdomain(NLS_CAT_NAME); 686#endif 687 my_ver = ext2fs_parse_version_string(my_ver_string); 688 lib_ver = ext2fs_get_library_version(0, &lib_ver_date); 689 if (my_ver > lib_ver) { 690 fprintf( stderr, _("Error: ext2fs library version " 691 "out of date!\n")); 692 show_version_only++; 693 } 694 695 retval = PRS(argc, argv, &ctx); 696 if (retval) { 697 com_err("e2fsck", retval, 698 _("while trying to initialize program")); 699 exit(FSCK_ERROR); 700 } 701 reserve_stdio_fds(); 702 703#ifdef RESOURCE_TRACK 704 init_resource_track(&ctx->global_rtrack); 705#endif 706 707 if (!(ctx->options & E2F_OPT_PREEN) || show_version_only) 708 fprintf (stderr, _("e2fsck %s, %s for EXT2 FS %s, %s\n"), 709 my_ver_string, my_ver_date, EXT2FS_VERSION, 710 EXT2FS_DATE); 711 712 if (show_version_only) { 713 fprintf(stderr, _("\tUsing %s, %s\n"), 714 error_message(EXT2_ET_BASE), lib_ver_date); 715 exit(FSCK_OK); 716 } 717 718 check_mount(ctx); 719 720 if (!(ctx->options & E2F_OPT_PREEN) && 721 !(ctx->options & E2F_OPT_NO) && 722 !(ctx->options & E2F_OPT_YES)) { 723 if (!isatty (0) || !isatty (1)) 724 fatal_error(ctx, 725 _("need terminal for interactive repairs")); 726 } 727 ctx->superblock = ctx->use_superblock; 728restart: 729#if 1 730 io_ptr = unix_io_manager; 731#else 732 io_ptr = test_io_manager; 733 test_io_backing_manager = unix_io_manager; 734#endif 735 flags = 0; 736 if ((ctx->options & E2F_OPT_READONLY) == 0) 737 flags |= EXT2_FLAG_RW; 738 739 if (ctx->superblock && blocksize) { 740 retval = ext2fs_open(ctx->filesystem_name, flags, 741 ctx->superblock, blocksize, io_ptr, &fs); 742 } else if (ctx->superblock) { 743 for (i=0; possible_block_sizes[i]; i++) { 744 retval = ext2fs_open(ctx->filesystem_name, flags, 745 ctx->superblock, 746 possible_block_sizes[i], 747 io_ptr, &fs); 748 if (!retval) 749 break; 750 } 751 } else 752 retval = ext2fs_open(ctx->filesystem_name, flags, 753 0, 0, io_ptr, &fs); 754 if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) && 755 ((retval == EXT2_ET_BAD_MAGIC) || 756 ((retval == 0) && ext2fs_check_desc(fs)))) { 757 if (!fs || (fs->group_desc_count > 1)) { 758 printf(_("%s trying backup blocks...\n"), 759 retval ? _("Couldn't find ext2 superblock,") : 760 _("Group descriptors look bad...")); 761 ctx->superblock = get_backup_sb(fs); 762 if (fs) 763 ext2fs_close(fs); 764 goto restart; 765 } 766 } 767 if (retval) { 768 com_err(ctx->program_name, retval, _("while trying to open %s"), 769 ctx->filesystem_name); 770 if (retval == EXT2_ET_REV_TOO_HIGH) { 771 printf(_("The filesystem revision is apparently " 772 "too high for this version of e2fsck.\n" 773 "(Or the filesystem superblock " 774 "is corrupt)\n\n")); 775 fix_problem(ctx, PR_0_SB_CORRUPT, &pctx); 776 } else if (retval == EXT2_ET_SHORT_READ) 777 printf(_("Could this be a zero-length partition?\n")); 778 else if ((retval == EPERM) || (retval == EACCES)) 779 printf(_("You must have %s access to the " 780 "filesystem or be root\n"), 781 (ctx->options & E2F_OPT_READONLY) ? 782 "r/o" : "r/w"); 783 else if (retval == ENXIO) 784 printf(_("Possibly non-existent or swap device?\n")); 785#ifdef EROFS 786 else if (retval == EROFS) 787 printf(_("Disk write-protected; use the -n option " 788 "to do a read-only\n" 789 "check of the device.\n")); 790#endif 791 else 792 fix_problem(ctx, PR_0_SB_CORRUPT, &pctx); 793 fatal_error(ctx, 0); 794 } 795 ctx->fs = fs; 796 fs->priv_data = ctx; 797 sb = fs->super; 798 if (sb->s_rev_level > E2FSCK_CURRENT_REV) { 799 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH, 800 _("while trying to open %s"), 801 ctx->filesystem_name); 802 get_newer: 803 fatal_error(ctx, _("Get a newer version of e2fsck!")); 804 } 805 806 /* 807 * Set the device name, which is used whenever we print error 808 * or informational messages to the user. 809 */ 810 if (ctx->device_name == 0 && 811 (sb->s_volume_name[0] != 0)) { 812 char *cp = malloc(sizeof(sb->s_volume_name)+1); 813 if (cp) { 814 strncpy(cp, sb->s_volume_name, 815 sizeof(sb->s_volume_name)); 816 cp[sizeof(sb->s_volume_name)] = 0; 817 ctx->device_name = cp; 818 } 819 } 820 if (ctx->device_name == 0) 821 ctx->device_name = ctx->filesystem_name; 822 823 /* 824 * Make sure the ext3 superblock fields are consistent. 825 */ 826 retval = e2fsck_check_ext3_journal(ctx); 827 if (retval) { 828 com_err(ctx->program_name, retval, 829 _("while checking ext3 journal for %s"), 830 ctx->device_name); 831 ext2fs_close(ctx->fs); 832 fatal_error(ctx, 0); 833 } 834 835 /* 836 * Check to see if we need to do ext3-style recovery. If so, 837 * do it, and then restart the fsck. 838 */ 839 if (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) { 840 if (ctx->options & E2F_OPT_READONLY) { 841 printf(_("Warning: skipping journal recovery " 842 "because doing a read-only filesystem " 843 "check.\n")); 844 io_channel_flush(ctx->fs->io); 845 } else { 846 retval = e2fsck_run_ext3_journal(ctx); 847 if (retval) { 848 com_err(ctx->program_name, retval, 849 _("while recovering ext3 journal of %s"), 850 ctx->device_name); 851 fatal_error(ctx, 0); 852 } 853 ext2fs_close(ctx->fs); 854 ctx->fs = 0; 855 goto restart; 856 } 857 } 858 859 /* 860 * Check for compatibility with the feature sets. We need to 861 * be more stringent than ext2fs_open(). 862 */ 863 if ((sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) || 864 (sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP)) { 865 com_err(ctx->program_name, EXT2_ET_UNSUPP_FEATURE, 866 "(%s)", ctx->device_name); 867 goto get_newer; 868 } 869 if (sb->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) { 870 com_err(ctx->program_name, EXT2_ET_RO_UNSUPP_FEATURE, 871 "(%s)", ctx->device_name); 872 goto get_newer; 873 } 874#ifdef ENABLE_COMPRESSION 875 if (sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_COMPRESSION) 876 com_err(ctx->program_name, 0, 877 _("Warning: compression support is experimental.\n")); 878#endif 879 880 /* 881 * If the user specified a specific superblock, presumably the 882 * master superblock has been trashed. So we mark the 883 * superblock as dirty, so it can be written out. 884 */ 885 if (ctx->superblock && 886 !(ctx->options & E2F_OPT_READONLY)) 887 ext2fs_mark_super_dirty(fs); 888 889 /* 890 * Don't overwrite the backup superblock and block 891 * descriptors, until we're sure the filesystem is OK.... 892 */ 893 fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; 894 895 ehandler_init(fs->io); 896 897 if (ctx->superblock) 898 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0); 899 check_super_block(ctx); 900 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 901 fatal_error(ctx, 0); 902 check_if_skip(ctx); 903 if (bad_blocks_file) 904 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks); 905 else if (cflag) 906 test_disk(ctx); 907 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 908 fatal_error(ctx, 0); 909#ifdef ENABLE_SWAPFS 910 if (normalize_swapfs) { 911 if ((fs->flags & EXT2_FLAG_SWAP_BYTES) == 912 ext2fs_native_flag()) { 913 fprintf(stderr, _("%s: Filesystem byte order " 914 "already normalized.\n"), ctx->device_name); 915 fatal_error(ctx, 0); 916 } 917 } 918 if (swapfs) { 919 swap_filesys(ctx); 920 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 921 fatal_error(ctx, 0); 922 } 923#endif 924 925 /* 926 * Mark the system as valid, 'til proven otherwise 927 */ 928 ext2fs_mark_valid(fs); 929 930 retval = ext2fs_read_bb_inode(fs, &fs->badblocks); 931 if (retval) { 932 com_err(ctx->program_name, retval, 933 _("while reading bad blocks inode")); 934 preenhalt(ctx); 935 printf(_("This doesn't bode well," 936 " but we'll try to go on...\n")); 937 } 938 939 run_result = e2fsck_run(ctx); 940 e2fsck_clear_progbar(ctx); 941 if (run_result == E2F_FLAG_RESTART) { 942 printf(_("Restarting e2fsck from the beginning...\n")); 943 retval = e2fsck_reset_context(ctx); 944 if (retval) { 945 com_err(ctx->program_name, retval, 946 _("while resetting context")); 947 fatal_error(ctx, 0); 948 } 949 ext2fs_close(fs); 950 goto restart; 951 } 952 if (run_result & E2F_FLAG_SIGNAL_MASK) 953 fatal_error(ctx, 0); 954 if (run_result & E2F_FLAG_CANCEL) 955 ext2fs_unmark_valid(fs); 956 957#ifdef MTRACE 958 mtrace_print("Cleanup"); 959#endif 960 if (ext2fs_test_changed(fs)) { 961 exit_value = FSCK_NONDESTRUCT; 962 if (!(ctx->options & E2F_OPT_PREEN)) 963 printf(_("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"), 964 ctx->device_name); 965 if (root_filesystem && !read_only_root) { 966 printf(_("%s: ***** REBOOT LINUX *****\n"), 967 ctx->device_name); 968 exit_value = FSCK_REBOOT; 969 } 970 } 971 if (ext2fs_test_valid(fs)) 972 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; 973 else { 974 printf(_("\n%s: ********** WARNING: Filesystem still has " 975 "errors **********\n\n"), ctx->device_name); 976 exit_value = FSCK_UNCORRECTED; 977 } 978 if (!(ctx->options & E2F_OPT_READONLY)) { 979 if (ext2fs_test_valid(fs)) { 980 if (!(sb->s_state & EXT2_VALID_FS)) 981 exit_value = FSCK_NONDESTRUCT; 982 sb->s_state = EXT2_VALID_FS; 983 } else 984 sb->s_state &= ~EXT2_VALID_FS; 985 sb->s_mnt_count = 0; 986 sb->s_lastcheck = time(NULL); 987 ext2fs_mark_super_dirty(fs); 988 } 989 show_stats(ctx); 990 991 e2fsck_write_bitmaps(ctx); 992 993 ext2fs_close(fs); 994 ctx->fs = NULL; 995 e2fsck_free_context(ctx); 996 997#ifdef RESOURCE_TRACK 998 if (ctx->options & E2F_OPT_TIME) 999 print_resource_track(NULL, &ctx->global_rtrack); 1000#endif 1001 1002 return exit_value; 1003} 1004