unix.c revision 53ef44c40a3e425d2c700d8fd77a6b655aa121fe
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] 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 " -l bad_blocks_file Add to badblocks list\n" 82 " -L bad_blocks_file Set badblocks list\n" 83 )); 84 85 exit(FSCK_USAGE); 86} 87 88static void show_stats(e2fsck_t ctx) 89{ 90 ext2_filsys fs = ctx->fs; 91 int inodes, inodes_used, blocks, blocks_used; 92 int dir_links; 93 int num_files, num_links; 94 int frag_percent; 95 96 dir_links = 2 * ctx->fs_directory_count - 1; 97 num_files = ctx->fs_total_count - dir_links; 98 num_links = ctx->fs_links_count - dir_links; 99 inodes = fs->super->s_inodes_count; 100 inodes_used = (fs->super->s_inodes_count - 101 fs->super->s_free_inodes_count); 102 blocks = fs->super->s_blocks_count; 103 blocks_used = (fs->super->s_blocks_count - 104 fs->super->s_free_blocks_count); 105 106 frag_percent = (10000 * ctx->fs_fragmented) / inodes_used; 107 frag_percent = (frag_percent + 5) / 10; 108 109 if (!verbose) { 110 printf(_("%s: %d/%d files (%0d.%d%% non-contiguous), %d/%d blocks\n"), 111 ctx->device_name, inodes_used, inodes, 112 frag_percent / 10, frag_percent % 10, 113 blocks_used, blocks); 114 return; 115 } 116 /* 117 * This is a bit ugly. But I think there will nearly always be more 118 * than one "thing" to report about, so I won't try writing complex 119 * code to handle one/two/many forms of all words. 120 * Some languages (Italian, at least) never uses the plural form 121 * of foreign words, so in real life this could not be a problem. 122 * md@linux.it - 2000-1-15 123 */ 124#ifdef ENABLE_NLS 125 printf (_("\n%8d inodes used (%d%%)\n"), inodes_used, 126 (inodes_used != 1), 100 * inodes_used / inodes); 127 printf (_("%8d non-contiguous inodes (%0d.%d%%)\n"), 128 ctx->fs_fragmented, frag_percent / 10, frag_percent % 10); 129 printf (_(" # of inodes with ind/dind/tind blocks: %d/%d/%d\n"), 130 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count); 131 printf (_("%8d blocks used (%d%%)\n" 132 "%8d bad blocks\n"), blocks_used, 133 100 * blocks_used / blocks, ctx->fs_badblocks_count); 134 printf (_("\n%8d regular files\n" 135 "%8d directories\n" 136 "%8d character device files\n" 137 "%8d block device files\n" 138 "%8d fifos\n" 139 "%8d links\n" 140 "%8d symbolic links (%d fast symbolic links)\n" 141 "%8d sockets\n" 142 "--------\n" 143 "%8d files\n"), 144 ctx->fs_regular_count, 145 ctx->fs_directory_count, 146 ctx->fs_chardev_count, 147 ctx->fs_blockdev_count, 148 ctx->fs_fifo_count, 149 ctx->fs_links_count - dir_links, 150 ctx->fs_symlinks_count, 151 ctx->fs_fast_symlinks_count, 152 ctx->fs_sockets_count, 153 ctx->fs_total_count - dir_links); 154#else 155 printf ("\n%8d inode%s used (%d%%)\n", inodes_used, 156 (inodes_used != 1) ? "s" : "", 157 100 * inodes_used / inodes); 158 printf ("%8d non-contiguous inodes (%0d.%d%%)\n", 159 ctx->fs_fragmented, frag_percent / 10, frag_percent % 10); 160 printf (" # of inodes with ind/dind/tind blocks: %d/%d/%d\n", 161 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count); 162 printf ("%8d block%s used (%d%%)\n" 163 "%8d bad block%s\n", blocks_used, 164 (blocks_used != 1) ? "s" : "", 165 100 * blocks_used / blocks, ctx->fs_badblocks_count, 166 ctx->fs_badblocks_count != 1 ? "s" : ""); 167 printf ("\n%8d regular file%s\n" 168 "%8d director%s\n" 169 "%8d character device file%s\n" 170 "%8d block device file%s\n" 171 "%8d fifo%s\n" 172 "%8d link%s\n" 173 "%8d symbolic link%s (%d fast symbolic link%s)\n" 174 "%8d socket%s\n" 175 "--------\n" 176 "%8d file%s\n", 177 ctx->fs_regular_count, 178 (ctx->fs_regular_count != 1) ? "s" : "", 179 ctx->fs_directory_count, 180 (ctx->fs_directory_count != 1) ? "ies" : "y", 181 ctx->fs_chardev_count, 182 (ctx->fs_chardev_count != 1) ? "s" : "", 183 ctx->fs_blockdev_count, 184 (ctx->fs_blockdev_count != 1) ? "s" : "", 185 ctx->fs_fifo_count, 186 (ctx->fs_fifo_count != 1) ? "s" : "", 187 ctx->fs_links_count - dir_links, 188 ((ctx->fs_links_count - dir_links) != 1) ? "s" : "", 189 ctx->fs_symlinks_count, 190 (ctx->fs_symlinks_count != 1) ? "s" : "", 191 ctx->fs_fast_symlinks_count, 192 (ctx->fs_fast_symlinks_count != 1) ? "s" : "", 193 ctx->fs_sockets_count, (ctx->fs_sockets_count != 1) ? "s" : "", 194 ctx->fs_total_count - dir_links, 195 ((ctx->fs_total_count - dir_links) != 1) ? "s" : ""); 196#endif 197} 198 199static void check_mount(e2fsck_t ctx) 200{ 201 errcode_t retval; 202 int mount_flags, cont, fd; 203 204 retval = ext2fs_check_if_mounted(ctx->filesystem_name, &mount_flags); 205 if (retval) { 206 com_err("ext2fs_check_if_mount", retval, 207 _("while determining whether %s is mounted."), 208 ctx->filesystem_name); 209 return; 210 } 211 if (!(mount_flags & EXT2_MF_MOUNTED)) 212 return; 213 214#if (defined(__linux__) && defined(HAVE_MNTENT_H)) 215 /* 216 * If the root is mounted read-only, then /etc/mtab is 217 * probably not correct; so we won't issue a warning based on 218 * it. 219 */ 220 fd = open(MOUNTED, O_RDWR); 221 if (fd < 0) { 222 if (errno == EROFS) 223 return; 224 } else 225 close(fd); 226#endif 227 228 if (ctx->options & E2F_OPT_READONLY) { 229 printf(_("Warning! %s is mounted.\n"), ctx->filesystem_name); 230 return; 231 } 232 233 printf(_("%s is mounted. "), ctx->filesystem_name); 234 if (!isatty(0) || !isatty(1)) 235 fatal_error(ctx, _("Cannot continue, aborting.\n\n")); 236 printf(_("\n\n\007\007\007\007WARNING!!! " 237 "Running e2fsck on a mounted filesystem may cause\n" 238 "SEVERE filesystem damage.\007\007\007\n\n")); 239 cont = ask_yn(_("Do you really want to continue"), -1); 240 if (!cont) { 241 printf (_("check aborted.\n")); 242 exit (0); 243 } 244 return; 245} 246 247/* 248 * This routine checks to see if a filesystem can be skipped; if so, 249 * it will exit with E2FSCK_OK. Under some conditions it will print a 250 * message explaining why a check is being forced. 251 */ 252static void check_if_skip(e2fsck_t ctx) 253{ 254 ext2_filsys fs = ctx->fs; 255 const char *reason = NULL; 256 257 if (force || bad_blocks_file || cflag || swapfs) 258 return; 259 260 if (fs->super->s_state & EXT2_ERROR_FS) 261 reason = _("contains a file system with errors"); 262 else if ((fs->super->s_state & EXT2_VALID_FS) == 0) 263 reason = _("was not cleanly unmounted"); 264 else if ((fs->super->s_max_mnt_count >= 0) && 265 (fs->super->s_mnt_count >= 266 (unsigned) fs->super->s_max_mnt_count)) 267 reason = _("has reached maximal mount count"); 268 else if (fs->super->s_checkinterval && 269 time(0) >= (fs->super->s_lastcheck + 270 fs->super->s_checkinterval)) 271 reason = _("has gone too long without being checked"); 272 if (reason) { 273 printf(_("%s %s, check forced.\n"), ctx->device_name, reason); 274 return; 275 } 276 printf(_("%s: clean, %d/%d files, %d/%d blocks\n"), ctx->device_name, 277 fs->super->s_inodes_count - fs->super->s_free_inodes_count, 278 fs->super->s_inodes_count, 279 fs->super->s_blocks_count - fs->super->s_free_blocks_count, 280 fs->super->s_blocks_count); 281 ext2fs_close(fs); 282 exit(FSCK_OK); 283} 284 285/* 286 * For completion notice 287 */ 288struct percent_tbl { 289 int max_pass; 290 int table[32]; 291}; 292struct percent_tbl e2fsck_tbl = { 293 5, { 0, 70, 90, 92, 95, 100 } 294}; 295static char bar[] = 296 "===============================================================" 297 "==============================================================="; 298static char spaces[] = 299 " " 300 " "; 301 302static float calc_percent(struct percent_tbl *tbl, int pass, int curr, 303 int max) 304{ 305 float percent; 306 307 if (pass <= 0) 308 return 0.0; 309 if (pass > tbl->max_pass || max == 0) 310 return 100.0; 311 percent = ((float) curr) / ((float) max); 312 return ((percent * (tbl->table[pass] - tbl->table[pass-1])) 313 + tbl->table[pass-1]); 314} 315 316extern void e2fsck_clear_progbar(e2fsck_t ctx) 317{ 318 if (!(ctx->flags & E2F_FLAG_PROG_BAR)) 319 return; 320 321 printf("%s\r", spaces + (sizeof(spaces) - 80)); 322 ctx->flags &= ~E2F_FLAG_PROG_BAR; 323} 324 325static int e2fsck_update_progress(e2fsck_t ctx, int pass, 326 unsigned long cur, unsigned long max) 327{ 328 static const char spinner[] = "\\|/-"; 329 char buf[80]; 330 int i; 331 float percent; 332 int tick; 333 struct timeval tv; 334 static int dpywidth = 0; 335 336 if (pass == 0) 337 return 0; 338 339 if (ctx->progress_fd) { 340 sprintf(buf, "%d %lu %lu\n", pass, cur, max); 341 write(ctx->progress_fd, buf, strlen(buf)); 342 } else { 343 if (ctx->flags & E2F_FLAG_PROG_SUPPRESS) 344 return 0; 345 if (dpywidth == 0) { 346 dpywidth = 66 - strlen(ctx->device_name); 347 dpywidth = 8 * (dpywidth / 8); 348 } 349 /* 350 * Calculate the new progress position. If the 351 * percentage hasn't changed, then we skip out right 352 * away. 353 */ 354 percent = calc_percent(&e2fsck_tbl, pass, cur, max); 355 if (ctx->progress_last_percent == (int) 10 * percent) 356 return 0; 357 ctx->progress_last_percent = (int) 10 * percent; 358 359 /* 360 * If we've already updated the spinner once within 361 * the last 1/8th of a second, no point doing it 362 * again. 363 */ 364 gettimeofday(&tv, NULL); 365 tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8)); 366 if ((tick == ctx->progress_last_time) && 367 (cur != max) && (cur != 0)) 368 return 0; 369 ctx->progress_last_time = tick; 370 371 /* 372 * Advance the spinner, and note that the progress bar 373 * will be on the screen 374 */ 375 ctx->progress_pos = (ctx->progress_pos+1) & 3; 376 ctx->flags |= E2F_FLAG_PROG_BAR; 377 378 i = ((percent * dpywidth) + 50) / 100; 379 printf("%s: |%s%s", ctx->device_name, 380 bar + (sizeof(bar) - (i+1)), 381 spaces + (sizeof(spaces) - (dpywidth - i + 1))); 382 if (percent == 100.0) 383 fputc('|', stdout); 384 else 385 fputc(spinner[ctx->progress_pos & 3], stdout); 386 printf(" %4.1f%% \r", percent); 387 if (percent == 100.0) 388 e2fsck_clear_progbar(ctx); 389 fflush(stdout); 390 } 391 return 0; 392} 393 394#define PATH_SET "PATH=/sbin" 395 396static void reserve_stdio_fds(NOARGS) 397{ 398 int fd; 399 400 while (1) { 401 fd = open("/dev/null", O_RDWR); 402 if (fd > 2) 403 break; 404 if (fd < 0) { 405 fprintf(stderr, _("ERROR: Couldn't open " 406 "/dev/null (%s)\n"), 407 strerror(errno)); 408 break; 409 } 410 } 411 close(fd); 412} 413 414#ifdef HAVE_SIGNAL_H 415static void signal_progress_on(int sig) 416{ 417 e2fsck_t ctx = e2fsck_global_ctx; 418 419 if (!ctx) 420 return; 421 422 ctx->progress = e2fsck_update_progress; 423 ctx->progress_fd = 0; 424} 425 426static void signal_progress_off(int sig) 427{ 428 e2fsck_t ctx = e2fsck_global_ctx; 429 430 if (!ctx) 431 return; 432 433 e2fsck_clear_progbar(ctx); 434 ctx->progress = 0; 435} 436#endif 437 438static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx) 439{ 440 int flush = 0; 441 int c; 442#ifdef MTRACE 443 extern void *mallwatch; 444#endif 445 char *oldpath = getenv("PATH"); 446 e2fsck_t ctx; 447 errcode_t retval; 448#ifdef HAVE_SIGNAL_H 449 struct sigaction sa; 450#endif 451 452 retval = e2fsck_allocate_context(&ctx); 453 if (retval) 454 return retval; 455 456 *ret_ctx = ctx; 457 458 /* Update our PATH to include /sbin */ 459 if (oldpath) { 460 char *newpath; 461 462 newpath = (char *) malloc(sizeof (PATH_SET) + 1 + 463 strlen (oldpath)); 464 if (!newpath) 465 fatal_error(ctx, "Couldn't malloc() newpath"); 466 strcpy (newpath, PATH_SET); 467 strcat (newpath, ":"); 468 strcat (newpath, oldpath); 469 putenv (newpath); 470 } else 471 putenv (PATH_SET); 472 473 setbuf(stdout, NULL); 474 setbuf(stderr, NULL); 475 initialize_ext2_error_table(); 476 477 if (argc && *argv) 478 ctx->program_name = *argv; 479 else 480 ctx->program_name = "e2fsck"; 481 while ((c = getopt (argc, argv, "panyrcC:B:dfvtFVM:b:I:P:l:L:N:Ss")) != EOF) 482 switch (c) { 483 case 'C': 484 ctx->progress = e2fsck_update_progress; 485 ctx->progress_fd = atoi(optarg); 486 break; 487 case 'p': 488 case 'a': 489 ctx->options |= E2F_OPT_PREEN; 490 ctx->options &= ~(E2F_OPT_YES|E2F_OPT_NO); 491 break; 492 case 'n': 493 ctx->options |= E2F_OPT_NO; 494 ctx->options &= ~(E2F_OPT_YES|E2F_OPT_PREEN); 495 break; 496 case 'y': 497 ctx->options |= E2F_OPT_YES; 498 ctx->options &= ~(E2F_OPT_PREEN|E2F_OPT_NO); 499 break; 500 case 't': 501#ifdef RESOURCE_TRACK 502 if (ctx->options & E2F_OPT_TIME) 503 ctx->options |= E2F_OPT_TIME2; 504 else 505 ctx->options |= E2F_OPT_TIME; 506#else 507 fprintf(stderr, _("The -t option is not " 508 "supported on this version of e2fsck.\n")); 509#endif 510 break; 511 case 'c': 512 cflag++; 513 ctx->options |= E2F_OPT_CHECKBLOCKS; 514 break; 515 case 'r': 516 /* What we do by default, anyway! */ 517 break; 518 case 'b': 519 ctx->use_superblock = atoi(optarg); 520 break; 521 case 'B': 522 blocksize = atoi(optarg); 523 break; 524 case 'I': 525 ctx->inode_buffer_blocks = atoi(optarg); 526 break; 527 case 'P': 528 ctx->process_inode_size = atoi(optarg); 529 break; 530 case 'L': 531 replace_bad_blocks++; 532 case 'l': 533 bad_blocks_file = (char *) malloc(strlen(optarg)+1); 534 if (!bad_blocks_file) 535 fatal_error(ctx, 536 "Couldn't malloc bad_blocks_file"); 537 strcpy(bad_blocks_file, optarg); 538 break; 539 case 'd': 540 ctx->options |= E2F_OPT_DEBUG; 541 break; 542 case 'f': 543 force = 1; 544 break; 545 case 'F': 546#ifdef BLKFLSBUF 547 flush = 1; 548#else 549 fatal_error(ctx, _("-F not supported")); 550#endif 551 break; 552 case 'v': 553 verbose = 1; 554 break; 555 case 'V': 556 show_version_only = 1; 557 break; 558#ifdef MTRACE 559 case 'M': 560 mallwatch = (void *) strtol(optarg, NULL, 0); 561 break; 562#endif 563 case 'N': 564 ctx->device_name = optarg; 565 break; 566 case 's': 567 normalize_swapfs = 1; 568 case 'S': 569 swapfs = 1; 570 break; 571 default: 572 usage(ctx); 573 } 574 if (show_version_only) 575 return 0; 576 if (optind != argc - 1) 577 usage(ctx); 578 if ((ctx->options & E2F_OPT_NO) && !bad_blocks_file && 579 !cflag && !swapfs) 580 ctx->options |= E2F_OPT_READONLY; 581 ctx->filesystem_name = argv[optind]; 582#ifdef BLKFLSBUF 583 if (flush) { 584 int fd = open(ctx->filesystem_name, O_RDONLY, 0); 585 586 if (fd < 0) { 587 com_err("open", errno, 588 _("while opening %s for flushing"), 589 ctx->filesystem_name); 590 fatal_error(ctx, 0); 591 } 592 if (fsync(fd) < 0) { 593 com_err("fsync", errno, 594 _("while trying to flush %s"), 595 ctx->filesystem_name); 596 fatal_error(ctx, 0); 597 } 598 if (ioctl(fd, BLKFLSBUF, 0) < 0) { 599 com_err("BLKFLSBUF", errno, 600 _("while trying to flush %s"), 601 ctx->filesystem_name); 602 fatal_error(ctx, 0); 603 } 604 close(fd); 605 } 606#endif /* BLKFLSBUF */ 607 if (swapfs) { 608 if (cflag || bad_blocks_file) { 609 fprintf(stderr, _("Incompatible options not " 610 "allowed when byte-swapping.\n")); 611 exit(FSCK_USAGE); 612 } 613 } 614#ifdef HAVE_SIGNAL_H 615 /* 616 * Set up signal action 617 */ 618 memset(&sa, 0, sizeof(struct sigaction)); 619#ifdef SA_RESTART 620 sa.sa_flags = SA_RESTART; 621#endif 622 e2fsck_global_ctx = ctx; 623 sa.sa_handler = signal_progress_on; 624 sigaction(SIGUSR1, &sa, 0); 625 sa.sa_handler = signal_progress_off; 626 sigaction(SIGUSR2, &sa, 0); 627#endif 628 return 0; 629} 630 631static const char *my_ver_string = E2FSPROGS_VERSION; 632static const char *my_ver_date = E2FSPROGS_DATE; 633 634int main (int argc, char *argv[]) 635{ 636 errcode_t retval = 0; 637 int exit_value = FSCK_OK; 638 int i; 639 ext2_filsys fs = 0; 640 io_manager io_ptr; 641 struct ext2_super_block *sb; 642 const char *lib_ver_date; 643 int my_ver, lib_ver; 644 e2fsck_t ctx; 645 struct problem_context pctx; 646 int flags, run_result; 647 648 clear_problem_context(&pctx); 649#ifdef MTRACE 650 mtrace(); 651#endif 652#ifdef MCHECK 653 mcheck(0); 654#endif 655#ifdef ENABLE_NLS 656 setlocale(LC_MESSAGES, ""); 657 bindtextdomain(NLS_CAT_NAME, LOCALEDIR); 658 textdomain(NLS_CAT_NAME); 659#endif 660 my_ver = ext2fs_parse_version_string(my_ver_string); 661 lib_ver = ext2fs_get_library_version(0, &lib_ver_date); 662 if (my_ver > lib_ver) { 663 fprintf( stderr, _("Error: ext2fs library version " 664 "out of date!\n")); 665 show_version_only++; 666 } 667 668 retval = PRS(argc, argv, &ctx); 669 if (retval) { 670 com_err("e2fsck", retval, 671 _("while trying to initialize program")); 672 exit(FSCK_ERROR); 673 } 674 reserve_stdio_fds(); 675 676#ifdef RESOURCE_TRACK 677 init_resource_track(&ctx->global_rtrack); 678#endif 679 680 if (!(ctx->options & E2F_OPT_PREEN) || show_version_only) 681 fprintf (stderr, _("e2fsck %s, %s for EXT2 FS %s, %s\n"), 682 my_ver_string, my_ver_date, EXT2FS_VERSION, 683 EXT2FS_DATE); 684 685 if (show_version_only) { 686 fprintf(stderr, _("\tUsing %s, %s\n"), 687 error_message(EXT2_ET_BASE), lib_ver_date); 688 exit(FSCK_OK); 689 } 690 691 check_mount(ctx); 692 693 if (!(ctx->options & E2F_OPT_PREEN) && 694 !(ctx->options & E2F_OPT_NO) && 695 !(ctx->options & E2F_OPT_YES)) { 696 if (!isatty (0) || !isatty (1)) 697 fatal_error(ctx, 698 _("need terminal for interactive repairs")); 699 } 700 ctx->superblock = ctx->use_superblock; 701restart: 702#if 1 703 io_ptr = unix_io_manager; 704#else 705 io_ptr = test_io_manager; 706 test_io_backing_manager = unix_io_manager; 707#endif 708 flags = 0; 709 if ((ctx->options & E2F_OPT_READONLY) == 0) 710 flags |= EXT2_FLAG_RW; 711 712 if (ctx->superblock && blocksize) { 713 retval = ext2fs_open(ctx->filesystem_name, flags, 714 ctx->superblock, blocksize, io_ptr, &fs); 715 } else if (ctx->superblock) { 716 for (i=0; possible_block_sizes[i]; i++) { 717 retval = ext2fs_open(ctx->filesystem_name, flags, 718 ctx->superblock, 719 possible_block_sizes[i], 720 io_ptr, &fs); 721 if (!retval) 722 break; 723 } 724 } else 725 retval = ext2fs_open(ctx->filesystem_name, flags, 726 0, 0, io_ptr, &fs); 727 if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) && 728 ((retval == EXT2_ET_BAD_MAGIC) || 729 ((retval == 0) && ext2fs_check_desc(fs)))) { 730 if (!fs || (fs->group_desc_count > 1)) { 731 printf(_("%s trying backup blocks...\n"), 732 retval ? _("Couldn't find ext2 superblock,") : 733 _("Group descriptors look bad...")); 734 ctx->superblock = get_backup_sb(fs); 735 if (fs) 736 ext2fs_close(fs); 737 goto restart; 738 } 739 } 740 if (retval) { 741 com_err(ctx->program_name, retval, _("while trying to open %s"), 742 ctx->filesystem_name); 743 if (retval == EXT2_ET_REV_TOO_HIGH) { 744 printf(_("The filesystem revision is apparently " 745 "too high for this version of e2fsck.\n" 746 "(Or the filesystem superblock " 747 "is corrupt)\n\n")); 748 fix_problem(ctx, PR_0_SB_CORRUPT, &pctx); 749 } else if (retval == EXT2_ET_SHORT_READ) 750 printf(_("Could this be a zero-length partition?\n")); 751 else if ((retval == EPERM) || (retval == EACCES)) 752 printf(_("You must have %s access to the " 753 "filesystem or be root\n"), 754 (ctx->options & E2F_OPT_READONLY) ? 755 "r/o" : "r/w"); 756 else if (retval == ENXIO) 757 printf(_("Possibly non-existent or swap device?\n")); 758#ifdef EROFS 759 else if (retval == EROFS) 760 printf(_("Disk write-protected; use the -n option " 761 "to do a read-only\n" 762 "check of the device.\n")); 763#endif 764 else 765 fix_problem(ctx, PR_0_SB_CORRUPT, &pctx); 766 fatal_error(ctx, 0); 767 } 768 ctx->fs = fs; 769 fs->priv_data = ctx; 770 sb = fs->super; 771 if (sb->s_rev_level > E2FSCK_CURRENT_REV) { 772 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH, 773 _("while trying to open %s"), 774 ctx->filesystem_name); 775 get_newer: 776 fatal_error(ctx, _("Get a newer version of e2fsck!")); 777 } 778 779 /* 780 * Set the device name, which is used whenever we print error 781 * or informational messages to the user. 782 */ 783 if (ctx->device_name == 0 && 784 (sb->s_volume_name[0] != 0)) { 785 char *cp = malloc(sizeof(sb->s_volume_name)+1); 786 if (cp) { 787 strncpy(cp, sb->s_volume_name, 788 sizeof(sb->s_volume_name)); 789 cp[sizeof(sb->s_volume_name)] = 0; 790 ctx->device_name = cp; 791 } 792 } 793 if (ctx->device_name == 0) 794 ctx->device_name = ctx->filesystem_name; 795 796 /* 797 * Make sure the ext3 superblock fields are consistent. 798 */ 799 retval = e2fsck_check_ext3_journal(ctx); 800 if (retval) { 801 com_err(ctx->program_name, retval, 802 _("while checking ext3 journal for %s"), 803 ctx->device_name); 804 ext2fs_close(ctx->fs); 805 fatal_error(ctx, 0); 806 } 807 808 /* 809 * Check to see if we need to do ext3-style recovery. If so, 810 * do it, and then restart the fsck. 811 */ 812 if (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) { 813 if (ctx->options & E2F_OPT_READONLY) { 814 printf(_("Warning: skipping journal recovery " 815 "because doing a read-only filesystem " 816 "check.\n")); 817 io_channel_flush(ctx->fs->io); 818 } else { 819 retval = e2fsck_run_ext3_journal(ctx); 820 if (retval) { 821 com_err(ctx->program_name, retval, 822 _("while recovering ext3 journal of %s"), 823 ctx->device_name); 824 fatal_error(ctx, 0); 825 } 826 ext2fs_close(ctx->fs); 827 ctx->fs = 0; 828 goto restart; 829 } 830 } 831 832 /* 833 * Check for compatibility with the feature sets. We need to 834 * be more stringent than ext2fs_open(). 835 */ 836 if ((sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) || 837 (sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP)) { 838 com_err(ctx->program_name, EXT2_ET_UNSUPP_FEATURE, 839 "(%s)", ctx->device_name); 840 goto get_newer; 841 } 842 if (sb->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) { 843 com_err(ctx->program_name, EXT2_ET_RO_UNSUPP_FEATURE, 844 "(%s)", ctx->device_name); 845 goto get_newer; 846 } 847#ifdef ENABLE_COMPRESSION 848 if (sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_COMPRESSION) 849 com_err(ctx->program_name, 0, 850 _("Warning: compression support is experimental.\n")); 851#endif 852 853 /* 854 * If the user specified a specific superblock, presumably the 855 * master superblock has been trashed. So we mark the 856 * superblock as dirty, so it can be written out. 857 */ 858 if (ctx->superblock && 859 !(ctx->options & E2F_OPT_READONLY)) 860 ext2fs_mark_super_dirty(fs); 861 862 /* 863 * Don't overwrite the backup superblock and block 864 * descriptors, until we're sure the filesystem is OK.... 865 */ 866 fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; 867 868 ehandler_init(fs->io); 869 870 if (ctx->superblock) 871 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0); 872 check_super_block(ctx); 873 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 874 fatal_error(ctx, 0); 875 check_if_skip(ctx); 876 if (bad_blocks_file) 877 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks); 878 else if (cflag) 879 test_disk(ctx); 880 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 881 fatal_error(ctx, 0); 882 883 if (normalize_swapfs) { 884 if ((fs->flags & EXT2_FLAG_SWAP_BYTES) == 885 ext2fs_native_flag()) { 886 fprintf(stderr, _("%s: Filesystem byte order " 887 "already normalized.\n"), ctx->device_name); 888 fatal_error(ctx, 0); 889 } 890 } 891 if (swapfs) { 892 swap_filesys(ctx); 893 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 894 fatal_error(ctx, 0); 895 } 896 897 /* 898 * Mark the system as valid, 'til proven otherwise 899 */ 900 ext2fs_mark_valid(fs); 901 902 retval = ext2fs_read_bb_inode(fs, &fs->badblocks); 903 if (retval) { 904 com_err(ctx->program_name, retval, 905 _("while reading bad blocks inode")); 906 preenhalt(ctx); 907 printf(_("This doesn't bode well," 908 " but we'll try to go on...\n")); 909 } 910 911 run_result = e2fsck_run(ctx); 912 e2fsck_clear_progbar(ctx); 913 if (run_result == E2F_FLAG_RESTART) { 914 printf(_("Restarting e2fsck from the beginning...\n")); 915 retval = e2fsck_reset_context(ctx); 916 if (retval) { 917 com_err(ctx->program_name, retval, 918 _("while resetting context")); 919 fatal_error(ctx, 0); 920 } 921 ext2fs_close(fs); 922 goto restart; 923 } 924 if (run_result & E2F_FLAG_SIGNAL_MASK) 925 fatal_error(ctx, 0); 926 if (run_result & E2F_FLAG_CANCEL) 927 ext2fs_unmark_valid(fs); 928 929#ifdef MTRACE 930 mtrace_print("Cleanup"); 931#endif 932 if (ext2fs_test_changed(fs)) { 933 exit_value = FSCK_NONDESTRUCT; 934 if (!(ctx->options & E2F_OPT_PREEN)) 935 printf(_("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"), 936 ctx->device_name); 937 if (root_filesystem && !read_only_root) { 938 printf(_("%s: ***** REBOOT LINUX *****\n"), 939 ctx->device_name); 940 exit_value = FSCK_REBOOT; 941 } 942 } 943 if (ext2fs_test_valid(fs)) 944 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY; 945 else 946 exit_value = FSCK_UNCORRECTED; 947 if (!(ctx->options & E2F_OPT_READONLY)) { 948 if (ext2fs_test_valid(fs)) { 949 if (!(sb->s_state & EXT2_VALID_FS)) 950 exit_value = FSCK_NONDESTRUCT; 951 sb->s_state = EXT2_VALID_FS; 952 } else 953 sb->s_state &= ~EXT2_VALID_FS; 954 sb->s_mnt_count = 0; 955 sb->s_lastcheck = time(NULL); 956 ext2fs_mark_super_dirty(fs); 957 } 958 show_stats(ctx); 959 960 e2fsck_write_bitmaps(ctx); 961 962#ifdef RESOURCE_TRACK 963 if (ctx->options & E2F_OPT_TIME) 964 print_resource_track(NULL, &ctx->global_rtrack); 965#endif 966 967 ext2fs_close(fs); 968 ctx->fs = NULL; 969 e2fsck_free_context(ctx); 970 971 return exit_value; 972} 973