unix.c revision 17390c047f5470eec005c5461a7926d03d6bbbe7
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 61static void usage(e2fsck_t ctx) 62{ 63 fprintf(stderr, 64 _("Usage: %s [-panyrcdfvstFSV] [-b superblock] [-B blocksize]\n" 65 "\t\t[-I inode_buffer_blocks] [-P process_inode_size]\n" 66 "\t\t[-l|-L bad_blocks_file] [-C fd] device\n"), 67 ctx->program_name); 68 69 fprintf(stderr, _("\nEmergency help:\n" 70 " -p Automatic repair (no questions)\n" 71 " -n Make no changes to the filesystem\n" 72 " -y Assume \"yes\" to all questions\n" 73 " -c Check for bad blocks\n" 74 " -f Force checking even if filesystem is marked clean\n" 75 " -v Be verbose\n" 76 " -b superblock Use alternative superblock\n" 77 " -B blocksize Force blocksize when looking for superblock\n" 78 " -l bad_blocks_file Add to badblocks list\n" 79 " -L bad_blocks_file Set badblocks list\n" 80 )); 81 82 exit(FSCK_USAGE); 83} 84 85static void show_stats(e2fsck_t ctx) 86{ 87 ext2_filsys fs = ctx->fs; 88 int inodes, inodes_used, blocks, blocks_used; 89 int dir_links; 90 int num_files, num_links; 91 int frag_percent; 92 93 dir_links = 2 * ctx->fs_directory_count - 1; 94 num_files = ctx->fs_total_count - dir_links; 95 num_links = ctx->fs_links_count - dir_links; 96 inodes = fs->super->s_inodes_count; 97 inodes_used = (fs->super->s_inodes_count - 98 fs->super->s_free_inodes_count); 99 blocks = fs->super->s_blocks_count; 100 blocks_used = (fs->super->s_blocks_count - 101 fs->super->s_free_blocks_count); 102 103 frag_percent = (10000 * ctx->fs_fragmented) / inodes_used; 104 frag_percent = (frag_percent + 5) / 10; 105 106 if (!verbose) { 107 printf(_("%s: %d/%d files (%0d.%d%% non-contiguous), %d/%d blocks\n"), 108 ctx->device_name, inodes_used, inodes, 109 frag_percent / 10, frag_percent % 10, 110 blocks_used, blocks); 111 return; 112 } 113 /* 114 * This is a bit ugly. But I think there will nearly always be more 115 * than one "thing" to report about, so I won't try writing complex 116 * code to handle one/two/many forms of all words. 117 * Some languages (Italian, at least) never uses the plural form 118 * of foreign words, so in real life this could not be a problem. 119 * md@linux.it - 2000-1-15 120 */ 121#ifdef ENABLE_NLS 122 printf (_("\n%8d inodes used (%d%%)\n"), inodes_used, 123 (inodes_used != 1), 100 * inodes_used / inodes); 124 printf (_("%8d non-contiguous inodes (%0d.%d%%)\n"), 125 ctx->fs_fragmented, frag_percent / 10, frag_percent % 10); 126 printf (_(" # of inodes with ind/dind/tind blocks: %d/%d/%d\n"), 127 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count); 128 printf (_("%8d blocks used (%d%%)\n" 129 "%8d bad blocks\n"), blocks_used, 130 100 * blocks_used / blocks, ctx->fs_badblocks_count); 131 printf (_("\n%8d regular files\n" 132 "%8d directories\n" 133 "%8d character device files\n" 134 "%8d block device files\n" 135 "%8d fifos\n" 136 "%8d links\n" 137 "%8d symbolic links (%d fast symbolic links)\n" 138 "%8d sockets\n" 139 "--------\n" 140 "%8d files\n"), 141 ctx->fs_regular_count, 142 ctx->fs_directory_count, 143 ctx->fs_chardev_count, 144 ctx->fs_blockdev_count, 145 ctx->fs_fifo_count, 146 ctx->fs_links_count - dir_links, 147 ctx->fs_symlinks_count, 148 ctx->fs_fast_symlinks_count, 149 ctx->fs_sockets_count, 150 ctx->fs_total_count - dir_links); 151#else 152 printf ("\n%8d inode%s used (%d%%)\n", inodes_used, 153 (inodes_used != 1) ? "s" : "", 154 100 * inodes_used / inodes); 155 printf ("%8d non-contiguous inodes (%0d.%d%%)\n", 156 ctx->fs_fragmented, frag_percent / 10, frag_percent % 10); 157 printf (" # of inodes with ind/dind/tind blocks: %d/%d/%d\n", 158 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count); 159 printf ("%8d block%s used (%d%%)\n" 160 "%8d bad block%s\n", blocks_used, 161 (blocks_used != 1) ? "s" : "", 162 100 * blocks_used / blocks, ctx->fs_badblocks_count, 163 ctx->fs_badblocks_count != 1 ? "s" : ""); 164 printf ("\n%8d regular file%s\n" 165 "%8d director%s\n" 166 "%8d character device file%s\n" 167 "%8d block device file%s\n" 168 "%8d fifo%s\n" 169 "%8d link%s\n" 170 "%8d symbolic link%s (%d fast symbolic link%s)\n" 171 "%8d socket%s\n" 172 "--------\n" 173 "%8d file%s\n", 174 ctx->fs_regular_count, 175 (ctx->fs_regular_count != 1) ? "s" : "", 176 ctx->fs_directory_count, 177 (ctx->fs_directory_count != 1) ? "ies" : "y", 178 ctx->fs_chardev_count, 179 (ctx->fs_chardev_count != 1) ? "s" : "", 180 ctx->fs_blockdev_count, 181 (ctx->fs_blockdev_count != 1) ? "s" : "", 182 ctx->fs_fifo_count, 183 (ctx->fs_fifo_count != 1) ? "s" : "", 184 ctx->fs_links_count - dir_links, 185 ((ctx->fs_links_count - dir_links) != 1) ? "s" : "", 186 ctx->fs_symlinks_count, 187 (ctx->fs_symlinks_count != 1) ? "s" : "", 188 ctx->fs_fast_symlinks_count, 189 (ctx->fs_fast_symlinks_count != 1) ? "s" : "", 190 ctx->fs_sockets_count, (ctx->fs_sockets_count != 1) ? "s" : "", 191 ctx->fs_total_count - dir_links, 192 ((ctx->fs_total_count - dir_links) != 1) ? "s" : ""); 193#endif 194} 195 196static void check_mount(e2fsck_t ctx) 197{ 198 errcode_t retval; 199 int mount_flags, cont, fd; 200 201 retval = ext2fs_check_if_mounted(ctx->filesystem_name, &mount_flags); 202 if (retval) { 203 com_err("ext2fs_check_if_mount", retval, 204 _("while determining whether %s is mounted."), 205 ctx->filesystem_name); 206 return; 207 } 208 if (!(mount_flags & EXT2_MF_MOUNTED)) 209 return; 210 211#if (defined(__linux__) && defined(HAVE_MNTENT_H)) 212 /* 213 * If the root is mounted read-only, then /etc/mtab is 214 * probably not correct; so we won't issue a warning based on 215 * it. 216 */ 217 fd = open(MOUNTED, O_RDWR); 218 if (fd < 0) { 219 if (errno == EROFS) 220 return; 221 } else 222 close(fd); 223#endif 224 225 if (ctx->options & E2F_OPT_READONLY) { 226 printf(_("Warning! %s is mounted.\n"), ctx->filesystem_name); 227 return; 228 } 229 230 printf(_("%s is mounted. "), ctx->filesystem_name); 231 if (!isatty(0) || !isatty(1)) { 232 printf(_("Cannot continue, aborting.\n\n")); 233 exit(FSCK_ERROR); 234 } 235 printf(_("\n\n\007\007\007\007WARNING!!! " 236 "Running e2fsck on a mounted filesystem may cause\n" 237 "SEVERE filesystem damage.\007\007\007\n\n")); 238 cont = ask_yn(_("Do you really want to continue"), -1); 239 if (!cont) { 240 printf (_("check aborted.\n")); 241 exit (0); 242 } 243 return; 244} 245 246/* 247 * This routine checks to see if a filesystem can be skipped; if so, 248 * it will exit with E2FSCK_OK. Under some conditions it will print a 249 * message explaining why a check is being forced. 250 */ 251static void check_if_skip(e2fsck_t ctx) 252{ 253 ext2_filsys fs = ctx->fs; 254 const char *reason = NULL; 255 256 if (force || bad_blocks_file || cflag || swapfs) 257 return; 258 259 if (fs->super->s_state & EXT2_ERROR_FS) 260 reason = _("contains a file system with errors"); 261 else if ((fs->super->s_state & EXT2_VALID_FS) == 0) 262 reason = _("was not cleanly unmounted"); 263 else if ((fs->super->s_max_mnt_count >= 0) && 264 (fs->super->s_mnt_count >= 265 (unsigned) fs->super->s_max_mnt_count)) 266 reason = _("has reached maximal mount count"); 267 else if (fs->super->s_checkinterval && 268 time(0) >= (fs->super->s_lastcheck + 269 fs->super->s_checkinterval)) 270 reason = _("has gone too long without being checked"); 271 if (reason) { 272 printf(_("%s %s, check forced.\n"), ctx->device_name, reason); 273 return; 274 } 275 printf(_("%s: clean, %d/%d files, %d/%d blocks\n"), ctx->device_name, 276 fs->super->s_inodes_count - fs->super->s_free_inodes_count, 277 fs->super->s_inodes_count, 278 fs->super->s_blocks_count - fs->super->s_free_blocks_count, 279 fs->super->s_blocks_count); 280 ext2fs_close(fs); 281 exit(FSCK_OK); 282} 283 284/* 285 * For completion notice 286 */ 287struct percent_tbl { 288 int max_pass; 289 int table[32]; 290}; 291struct percent_tbl e2fsck_tbl = { 292 5, { 0, 70, 90, 92, 95, 100 } 293}; 294static char bar[] = 295 "===============================================================" 296 "==============================================================="; 297static char spaces[] = 298 " " 299 " "; 300 301static float calc_percent(struct percent_tbl *tbl, int pass, int curr, 302 int max) 303{ 304 float percent; 305 306 if (pass <= 0) 307 return 0.0; 308 if (pass > tbl->max_pass) 309 return 100.0; 310 percent = ((float) curr) / ((float) max); 311 return ((percent * (tbl->table[pass] - tbl->table[pass-1])) 312 + tbl->table[pass-1]); 313} 314 315extern void e2fsck_clear_progbar(e2fsck_t ctx) 316{ 317 if (!(ctx->flags & E2F_FLAG_PROG_BAR)) 318 return; 319 320 printf("%s\r", spaces + (sizeof(spaces) - 80)); 321 ctx->flags &= ~E2F_FLAG_PROG_BAR; 322} 323 324static int e2fsck_update_progress(e2fsck_t ctx, int pass, 325 unsigned long cur, unsigned long max) 326{ 327 const char spinner[] = "\\|/-"; 328 char buf[80]; 329 int i; 330 float percent; 331 int tick; 332 struct timeval tv; 333 static int dpywidth = 0; 334 335 if (pass == 0) 336 return 0; 337 338 if (ctx->progress_fd) { 339 sprintf(buf, "%d %lu %lu\n", pass, cur, max); 340 write(ctx->progress_fd, buf, strlen(buf)); 341 } else { 342 if (ctx->flags & E2F_FLAG_PROG_SUPPRESS) 343 return 0; 344 if (dpywidth == 0) { 345 dpywidth = 66 - strlen(ctx->device_name); 346 dpywidth = 8 * (dpywidth / 8); 347 } 348 /* 349 * Calculate the new progress position. If the 350 * percentage hasn't changed, then we skip out right 351 * away. 352 */ 353 percent = calc_percent(&e2fsck_tbl, pass, cur, max); 354 if (ctx->progress_last_percent == (int) 10 * percent) 355 return 0; 356 ctx->progress_last_percent = (int) 10 * percent; 357 358 /* 359 * If we've already updated the spinner once within 360 * the last 1/8th of a second, no point doing it 361 * again. 362 */ 363 gettimeofday(&tv, NULL); 364 tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8)); 365 if ((tick == ctx->progress_last_time) && 366 (cur != max) && (cur != 0)) 367 return 0; 368 ctx->progress_last_time = tick; 369 370 /* 371 * Advance the spinner, and note that the progress bar 372 * will be on the screen 373 */ 374 ctx->progress_pos = (ctx->progress_pos+1) & 3; 375 ctx->flags |= E2F_FLAG_PROG_BAR; 376 377 i = ((percent * dpywidth) + 50) / 100; 378 printf("%s: |%s%s", ctx->device_name, 379 bar + (sizeof(bar) - (i+1)), 380 spaces + (sizeof(spaces) - (dpywidth - i + 1))); 381 if (percent == 100.0) 382 fputc('|', stdout); 383 else 384 fputc(spinner[ctx->progress_pos & 3], stdout); 385 printf(" %4.1f%% \r", percent); 386 if (percent == 100.0) 387 e2fsck_clear_progbar(ctx); 388 fflush(stdout); 389 } 390 return 0; 391} 392 393#define PATH_SET "PATH=/sbin" 394 395static void reserve_stdio_fds(NOARGS) 396{ 397 int fd; 398 399 while (1) { 400 fd = open("/dev/null", O_RDWR); 401 if (fd > 2) 402 break; 403 if (fd < 0) { 404 fprintf(stderr, _("ERROR: Couldn't open " 405 "/dev/null (%s)\n"), 406 strerror(errno)); 407 break; 408 } 409 } 410 close(fd); 411} 412 413#ifdef HAVE_SIGNAL_H 414static e2fsck_t global_signal_ctx; 415 416static void signal_progress_on(int sig) 417{ 418 e2fsck_t ctx = global_signal_ctx; 419 420 if (!ctx) 421 return; 422 423 ctx->progress = e2fsck_update_progress; 424 ctx->progress_fd = 0; 425} 426 427static void signal_progress_off(int sig) 428{ 429 e2fsck_t ctx = global_signal_ctx; 430 431 if (!ctx) 432 return; 433 434 e2fsck_clear_progbar(ctx); 435 ctx->progress = 0; 436} 437#endif 438 439static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx) 440{ 441 int flush = 0; 442 int c; 443#ifdef MTRACE 444 extern void *mallwatch; 445#endif 446 char *oldpath = getenv("PATH"); 447 e2fsck_t ctx; 448 errcode_t retval; 449#ifdef HAVE_SIGNAL_H 450 struct sigaction sa; 451#endif 452 453 retval = e2fsck_allocate_context(&ctx); 454 if (retval) 455 return retval; 456 457 *ret_ctx = ctx; 458 459 /* Update our PATH to include /sbin */ 460 if (oldpath) { 461 char *newpath; 462 463 newpath = (char *) malloc(sizeof (PATH_SET) + 1 + 464 strlen (oldpath)); 465 if (!newpath) 466 fatal_error(ctx, "Couldn't malloc() newpath"); 467 strcpy (newpath, PATH_SET); 468 strcat (newpath, ":"); 469 strcat (newpath, oldpath); 470 putenv (newpath); 471 } else 472 putenv (PATH_SET); 473 474 setbuf(stdout, NULL); 475 setbuf(stderr, NULL); 476 initialize_ext2_error_table(); 477 478 if (argc && *argv) 479 ctx->program_name = *argv; 480 else 481 ctx->program_name = "e2fsck"; 482 while ((c = getopt (argc, argv, "panyrcC:B:dfvtFVM:b:I:P:l:L:N:Ss")) != EOF) 483 switch (c) { 484 case 'C': 485 ctx->progress = e2fsck_update_progress; 486 ctx->progress_fd = atoi(optarg); 487 break; 488 case 'p': 489 case 'a': 490 ctx->options |= E2F_OPT_PREEN; 491 ctx->options &= ~(E2F_OPT_YES|E2F_OPT_NO); 492 break; 493 case 'n': 494 ctx->options |= E2F_OPT_NO; 495 ctx->options &= ~(E2F_OPT_YES|E2F_OPT_PREEN); 496 break; 497 case 'y': 498 ctx->options |= E2F_OPT_YES; 499 ctx->options &= ~(E2F_OPT_PREEN|E2F_OPT_NO); 500 break; 501 case 't': 502#ifdef RESOURCE_TRACK 503 if (ctx->options & E2F_OPT_TIME) 504 ctx->options |= E2F_OPT_TIME2; 505 else 506 ctx->options |= E2F_OPT_TIME; 507#else 508 fprintf(stderr, _("The -t option is not " 509 "supported on this version of e2fsck.\n")); 510#endif 511 break; 512 case 'c': 513 cflag++; 514 ctx->options |= E2F_OPT_CHECKBLOCKS; 515 break; 516 case 'r': 517 /* What we do by default, anyway! */ 518 break; 519 case 'b': 520 ctx->use_superblock = atoi(optarg); 521 break; 522 case 'B': 523 blocksize = atoi(optarg); 524 break; 525 case 'I': 526 ctx->inode_buffer_blocks = atoi(optarg); 527 break; 528 case 'P': 529 ctx->process_inode_size = atoi(optarg); 530 break; 531 case 'L': 532 replace_bad_blocks++; 533 case 'l': 534 bad_blocks_file = (char *) malloc(strlen(optarg)+1); 535 if (!bad_blocks_file) 536 fatal_error(ctx, 537 "Couldn't malloc bad_blocks_file"); 538 strcpy(bad_blocks_file, optarg); 539 break; 540 case 'd': 541 ctx->options |= E2F_OPT_DEBUG; 542 break; 543 case 'f': 544 force = 1; 545 break; 546 case 'F': 547#ifdef BLKFLSBUF 548 flush = 1; 549#else 550 fatal_error(ctx, _("-F not supported")); 551#endif 552 break; 553 case 'v': 554 verbose = 1; 555 break; 556 case 'V': 557 show_version_only = 1; 558 break; 559#ifdef MTRACE 560 case 'M': 561 mallwatch = (void *) strtol(optarg, NULL, 0); 562 break; 563#endif 564 case 'N': 565 ctx->device_name = optarg; 566 break; 567 case 's': 568 normalize_swapfs = 1; 569 case 'S': 570 swapfs = 1; 571 break; 572 default: 573 usage(ctx); 574 } 575 if (show_version_only) 576 return 0; 577 if (optind != argc - 1) 578 usage(ctx); 579 if ((ctx->options & E2F_OPT_NO) && !bad_blocks_file && 580 !cflag && !swapfs) 581 ctx->options |= E2F_OPT_READONLY; 582 ctx->filesystem_name = argv[optind]; 583#ifdef BLKFLSBUF 584 if (flush) { 585 int fd = open(ctx->filesystem_name, O_RDONLY, 0); 586 587 if (fd < 0) { 588 com_err("open", errno, 589 _("while opening %s for flushing"), 590 ctx->filesystem_name); 591 exit(FSCK_ERROR); 592 } 593 if (fsync(fd) < 0) { 594 com_err("fsync", errno, 595 _("while trying to flush %s"), 596 ctx->filesystem_name); 597 exit(FSCK_ERROR); 598 } 599 if (ioctl(fd, BLKFLSBUF, 0) < 0) { 600 com_err("BLKFLSBUF", errno, 601 _("while trying to flush %s"), 602 ctx->filesystem_name); 603 exit(FSCK_ERROR); 604 } 605 close(fd); 606 } 607#endif /* BLKFLSBUF */ 608 if (swapfs) { 609 if (cflag || bad_blocks_file) { 610 fprintf(stderr, _("Incompatible options not " 611 "allowed when byte-swapping.\n")); 612 exit(FSCK_ERROR); 613 } 614 } 615#ifdef HAVE_SIGNAL_H 616 /* 617 * Set up signal action 618 */ 619 memset(&sa, 0, sizeof(struct sigaction)); 620#ifdef SA_RESTART 621 sa.sa_flags = SA_RESTART; 622#endif 623 global_signal_ctx = ctx; 624 sa.sa_handler = signal_progress_on; 625 sigaction(SIGUSR1, &sa, 0); 626 sa.sa_handler = signal_progress_off; 627 sigaction(SIGUSR2, &sa, 0); 628#endif 629 return 0; 630} 631 632static const char *my_ver_string = E2FSPROGS_VERSION; 633static const char *my_ver_date = E2FSPROGS_DATE; 634 635int main (int argc, char *argv[]) 636{ 637 errcode_t retval = 0; 638 int exit_value = FSCK_OK; 639 int i; 640 ext2_filsys fs = 0; 641 io_manager io_ptr; 642 struct ext2fs_sb *s; 643 const char *lib_ver_date; 644 int my_ver, lib_ver; 645 e2fsck_t ctx; 646 struct problem_context pctx; 647 int flags, run_result; 648 649 clear_problem_context(&pctx); 650#ifdef MTRACE 651 mtrace(); 652#endif 653#ifdef MCHECK 654 mcheck(0); 655#endif 656#ifdef ENABLE_NLS 657 setlocale(LC_MESSAGES, ""); 658 bindtextdomain(NLS_CAT_NAME, LOCALEDIR); 659 textdomain(NLS_CAT_NAME); 660#endif 661 my_ver = ext2fs_parse_version_string(my_ver_string); 662 lib_ver = ext2fs_get_library_version(0, &lib_ver_date); 663 if (my_ver > lib_ver) { 664 fprintf( stderr, _("Error: ext2fs library version " 665 "out of date!\n")); 666 show_version_only++; 667 } 668 669 retval = PRS(argc, argv, &ctx); 670 if (retval) { 671 com_err("e2fsck", retval, 672 _("while trying to initialize program")); 673 exit(1); 674 } 675 reserve_stdio_fds(); 676 677#ifdef RESOURCE_TRACK 678 init_resource_track(&ctx->global_rtrack); 679#endif 680 681 if (!(ctx->options & E2F_OPT_PREEN) || show_version_only) 682 fprintf (stderr, _("e2fsck %s, %s for EXT2 FS %s, %s\n"), 683 my_ver_string, my_ver_date, EXT2FS_VERSION, 684 EXT2FS_DATE); 685 686 if (show_version_only) { 687 fprintf(stderr, _("\tUsing %s, %s\n"), 688 error_message(EXT2_ET_BASE), lib_ver_date); 689 exit(0); 690 } 691 692 check_mount(ctx); 693 694 if (!(ctx->options & E2F_OPT_PREEN) && 695 !(ctx->options & E2F_OPT_NO) && 696 !(ctx->options & E2F_OPT_YES)) { 697 if (!isatty (0) || !isatty (1)) 698 fatal_error(ctx, 699 _("need terminal for interactive repairs")); 700 } 701 ctx->superblock = ctx->use_superblock; 702restart: 703#if 1 704 io_ptr = unix_io_manager; 705#else 706 io_ptr = test_io_manager; 707 test_io_backing_manager = unix_io_manager; 708#endif 709 flags = 0; 710 if ((ctx->options & E2F_OPT_READONLY) == 0) 711 flags |= EXT2_FLAG_RW; 712 713 if (ctx->superblock && blocksize) { 714 retval = ext2fs_open(ctx->filesystem_name, flags, 715 ctx->superblock, blocksize, io_ptr, &fs); 716 } else if (ctx->superblock) { 717 for (i=0; possible_block_sizes[i]; i++) { 718 retval = ext2fs_open(ctx->filesystem_name, flags, 719 ctx->superblock, 720 possible_block_sizes[i], 721 io_ptr, &fs); 722 if (!retval) 723 break; 724 } 725 } else 726 retval = ext2fs_open(ctx->filesystem_name, flags, 727 0, 0, io_ptr, &fs); 728 if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) && 729 ((retval == EXT2_ET_BAD_MAGIC) || 730 ((retval == 0) && ext2fs_check_desc(fs)))) { 731 if (!fs || (fs->group_desc_count > 1)) { 732 printf(_("%s trying backup blocks...\n"), 733 retval ? _("Couldn't find ext2 superblock,") : 734 _("Group descriptors look bad...")); 735 ctx->superblock = get_backup_sb(fs); 736 if (fs) 737 ext2fs_close(fs); 738 goto restart; 739 } 740 } 741 if (retval) { 742 com_err(ctx->program_name, retval, _("while trying to open %s"), 743 ctx->filesystem_name); 744 if (retval == EXT2_ET_REV_TOO_HIGH) { 745 printf(_("The filesystem revision is apparently " 746 "too high for this version of e2fsck.\n" 747 "(Or the filesystem superblock " 748 "is corrupt)\n\n")); 749 fix_problem(ctx, PR_0_SB_CORRUPT, &pctx); 750 } else if (retval == EXT2_ET_SHORT_READ) 751 printf(_("Could this be a zero-length partition?\n")); 752 else if ((retval == EPERM) || (retval == EACCES)) 753 printf(_("You must have %s access to the " 754 "filesystem or be root\n"), 755 (ctx->options & E2F_OPT_READONLY) ? 756 "r/o" : "r/w"); 757 else if (retval == ENXIO) 758 printf(_("Possibly non-existent or swap device?\n")); 759#ifdef EROFS 760 else if (retval == EROFS) 761 printf(_("Disk write-protected; use the -n option " 762 "to do a read-only\n" 763 "check of the device.\n")); 764#endif 765 else 766 fix_problem(ctx, PR_0_SB_CORRUPT, &pctx); 767 exit(FSCK_ERROR); 768 } 769 ctx->fs = fs; 770 fs->priv_data = ctx; 771#ifdef EXT2_CURRENT_REV 772 if (fs->super->s_rev_level > E2FSCK_CURRENT_REV) { 773 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH, 774 _("while trying to open %s"), 775 ctx->filesystem_name); 776 get_newer: 777 fatal_error(ctx, _("Get a newer version of e2fsck!")); 778 } 779#endif 780 s = (struct ext2fs_sb *) fs->super; 781 /* 782 * Check to see if we need to do ext3-style recovery. If so, 783 * do it, and then restart the fsck. 784 */ 785 if (s->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) { 786 printf("%s: reading journal for ext3 filesystem...\n", 787 ctx->filesystem_name); 788 ext2fs_close(fs); 789 retval = e2fsck_run_ext3_journal(ctx->filesystem_name); 790 if (retval) { 791 com_err(ctx->program_name, retval, 792 ": couldn't load ext3 journal for %s", 793 ctx->filesystem_name); 794 exit(FSCK_ERROR); 795 } 796 goto restart; 797 } 798 /* 799 * Check for compatibility with the feature sets. We need to 800 * be more stringent than ext2fs_open(). 801 */ 802 if ((s->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) || 803 (s->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP)) { 804 com_err(ctx->program_name, EXT2_ET_UNSUPP_FEATURE, 805 "(%s)", ctx->filesystem_name); 806 goto get_newer; 807 } 808 if (s->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) { 809 com_err(ctx->program_name, EXT2_ET_RO_UNSUPP_FEATURE, 810 "(%s)", ctx->filesystem_name); 811 goto get_newer; 812 } 813#ifdef ENABLE_COMPRESSION 814 if (s->s_feature_incompat & EXT2_FEATURE_INCOMPAT_COMPRESSION) 815 com_err(ctx->program_name, 0, 816 _("Warning: compression support is experimental.\n")); 817#endif 818 if (ctx->device_name == 0 && 819 (s->s_volume_name[0] != 0)) { 820 char *cp = malloc(sizeof(s->s_volume_name)+1); 821 if (cp) { 822 strncpy(cp, s->s_volume_name, 823 sizeof(s->s_volume_name)); 824 cp[sizeof(s->s_volume_name)] = 0; 825 ctx->device_name = cp; 826 } 827 } 828 if (ctx->device_name == 0) 829 ctx->device_name = ctx->filesystem_name; 830 831 /* 832 * If the user specified a specific superblock, presumably the 833 * master superblock has been trashed. So we mark the 834 * superblock as dirty, so it can be written out. 835 */ 836 if (ctx->superblock && 837 !(ctx->options & E2F_OPT_READONLY)) 838 ext2fs_mark_super_dirty(fs); 839 840 /* 841 * Don't overwrite the backup superblock and block 842 * descriptors, until we're sure the filesystem is OK.... 843 */ 844 fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; 845 846 ehandler_init(fs->io); 847 848 if (ctx->superblock) 849 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0); 850 check_super_block(ctx); 851 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 852 exit(FSCK_ERROR); 853 check_if_skip(ctx); 854 if (bad_blocks_file) 855 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks); 856 else if (cflag) 857 test_disk(ctx); 858 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 859 exit(FSCK_ERROR); 860 861 if (normalize_swapfs) { 862 if ((fs->flags & EXT2_FLAG_SWAP_BYTES) == 863 ext2fs_native_flag()) { 864 fprintf(stderr, _("%s: Filesystem byte order " 865 "already normalized.\n"), ctx->device_name); 866 exit(FSCK_ERROR); 867 } 868 } 869 if (swapfs) { 870 swap_filesys(ctx); 871 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 872 exit(FSCK_ERROR); 873 } 874 875 /* 876 * Mark the system as valid, 'til proven otherwise 877 */ 878 ext2fs_mark_valid(fs); 879 880 retval = ext2fs_read_bb_inode(fs, &fs->badblocks); 881 if (retval) { 882 com_err(ctx->program_name, retval, 883 _("while reading bad blocks inode")); 884 preenhalt(ctx); 885 printf(_("This doesn't bode well," 886 " but we'll try to go on...\n")); 887 } 888 889 run_result = e2fsck_run(ctx); 890 e2fsck_clear_progbar(ctx); 891 if (run_result == E2F_FLAG_RESTART) { 892 printf(_("Restarting e2fsck from the beginning...\n")); 893 retval = e2fsck_reset_context(ctx); 894 if (retval) { 895 com_err(ctx->program_name, retval, 896 _("while resetting context")); 897 exit(1); 898 } 899 ext2fs_close(fs); 900 goto restart; 901 } 902 if (run_result & E2F_FLAG_SIGNAL_MASK) 903 exit(FSCK_ERROR); 904 if (run_result & E2F_FLAG_CANCEL) 905 ext2fs_unmark_valid(fs); 906 907#ifdef MTRACE 908 mtrace_print("Cleanup"); 909#endif 910 if (ext2fs_test_changed(fs)) { 911 exit_value = FSCK_NONDESTRUCT; 912 if (!(ctx->options & E2F_OPT_PREEN)) 913 printf(_("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"), 914 ctx->device_name); 915 if (root_filesystem && !read_only_root) { 916 printf(_("%s: ***** REBOOT LINUX *****\n"), 917 ctx->device_name); 918 exit_value = FSCK_REBOOT; 919 } 920 } 921 if (ext2fs_test_valid(fs)) 922 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; 923 else 924 exit_value = FSCK_UNCORRECTED; 925 if (!(ctx->options & E2F_OPT_READONLY)) { 926 if (ext2fs_test_valid(fs)) { 927 if (!(fs->super->s_state & EXT2_VALID_FS)) 928 exit_value = FSCK_NONDESTRUCT; 929 fs->super->s_state = EXT2_VALID_FS; 930 } else 931 fs->super->s_state &= ~EXT2_VALID_FS; 932 fs->super->s_mnt_count = 0; 933 fs->super->s_lastcheck = time(NULL); 934 ext2fs_mark_super_dirty(fs); 935 } 936 show_stats(ctx); 937 938 e2fsck_write_bitmaps(ctx); 939 940#ifdef RESOURCE_TRACK 941 if (ctx->options & E2F_OPT_TIME) 942 print_resource_track(NULL, &ctx->global_rtrack); 943#endif 944 945 ext2fs_close(fs); 946 ctx->fs = NULL; 947 e2fsck_free_context(ctx); 948 949 return exit_value; 950} 951