unix.c revision 1017f65179f4aa313f699109b471b79f99f38d3d
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#ifdef HAVE_SYS_IOCTL_H 37#include <sys/ioctl.h> 38#endif 39#ifdef HAVE_MALLOC_H 40#include <malloc.h> 41#endif 42#ifdef HAVE_SYS_TYPES_H 43#include <sys/types.h> 44#endif 45#ifdef HAVE_DIRENT_H 46#include <dirent.h> 47#endif 48 49#include "et/com_err.h" 50#include "e2fsck.h" 51#include "problem.h" 52#include "../version.h" 53 54/* Command line options */ 55static int swapfs; 56static int normalize_swapfs; 57static int cflag; /* check disk */ 58static int show_version_only; 59static int verbose; 60 61static int replace_bad_blocks; 62static int keep_bad_blocks; 63static char *bad_blocks_file; 64 65e2fsck_t e2fsck_global_ctx; /* Try your very best not to use this! */ 66 67#ifdef CONFIG_JBD_DEBUG /* Enabled by configure --enable-jfs-debug */ 68int journal_enable_debug = -1; 69#endif 70 71static void usage(e2fsck_t ctx) 72{ 73 fprintf(stderr, 74 _("Usage: %s [-panyrcdfvstDFSV] [-b superblock] [-B blocksize]\n" 75 "\t\t[-I inode_buffer_blocks] [-P process_inode_size]\n" 76 "\t\t[-l|-L bad_blocks_file] [-C fd] [-j external_journal]\n" 77 "\t\t[-E extended-options] device\n"), 78 ctx->program_name); 79 80 fprintf(stderr, _("\nEmergency help:\n" 81 " -p Automatic repair (no questions)\n" 82 " -n Make no changes to the filesystem\n" 83 " -y Assume \"yes\" to all questions\n" 84 " -c Check for bad blocks and add them to the badblock list\n" 85 " -f Force checking even if filesystem is marked clean\n")); 86 fprintf(stderr, _("" 87 " -v Be verbose\n" 88 " -b superblock Use alternative superblock\n" 89 " -B blocksize Force blocksize when looking for superblock\n" 90 " -j external_journal Set location of the external journal\n" 91 " -l bad_blocks_file Add to badblocks list\n" 92 " -L bad_blocks_file Set badblocks list\n" 93 )); 94 95 exit(FSCK_USAGE); 96} 97 98static void show_stats(e2fsck_t ctx) 99{ 100 ext2_filsys fs = ctx->fs; 101 int inodes, inodes_used, blocks, blocks_used; 102 int dir_links; 103 int num_files, num_links; 104 int frag_percent; 105 106 dir_links = 2 * ctx->fs_directory_count - 1; 107 num_files = ctx->fs_total_count - dir_links; 108 num_links = ctx->fs_links_count - dir_links; 109 inodes = fs->super->s_inodes_count; 110 inodes_used = (fs->super->s_inodes_count - 111 fs->super->s_free_inodes_count); 112 blocks = fs->super->s_blocks_count; 113 blocks_used = (fs->super->s_blocks_count - 114 fs->super->s_free_blocks_count); 115 116 frag_percent = (10000 * ctx->fs_fragmented) / inodes_used; 117 frag_percent = (frag_percent + 5) / 10; 118 119 if (!verbose) { 120 printf(_("%s: %d/%d files (%0d.%d%% non-contiguous), %d/%d blocks\n"), 121 ctx->device_name, inodes_used, inodes, 122 frag_percent / 10, frag_percent % 10, 123 blocks_used, blocks); 124 return; 125 } 126 printf (P_("\n%8d inode used (%d%%)\n", "\n%8d inodes used (%d%%)\n", 127 inodes_used), inodes_used, 100 * inodes_used / inodes); 128 printf (P_("%8d non-contiguous inode (%0d.%d%%)\n", 129 "%8d non-contiguous inodes (%0d.%d%%)\n", 130 ctx->fs_fragmented), 131 ctx->fs_fragmented, frag_percent / 10, frag_percent % 10); 132 printf (_(" # of inodes with ind/dind/tind blocks: %d/%d/%d\n"), 133 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count); 134 printf (P_("%8d block used (%d%%)\n", "%8d blocks used (%d%%)\n", 135 blocks_used), 136 blocks_used, (int) ((long long) 100 * blocks_used / blocks)); 137 printf (P_("%8d bad block\n", "%8d bad blocks\n", 138 ctx->fs_badblocks_count), ctx->fs_badblocks_count); 139 printf (P_("%8d large file\n", "%8d large files\n", 140 ctx->large_files), ctx->large_files); 141 printf (P_("\n%8d regular file\n", "\n%8d regular files\n", 142 ctx->fs_regular_count), ctx->fs_regular_count); 143 printf (P_("%8d directory\n", "%8d directories\n", 144 ctx->fs_directory_count), ctx->fs_directory_count); 145 printf (P_("%8d character device file\n", 146 "%8d character device files\n", ctx->fs_chardev_count), 147 ctx->fs_chardev_count); 148 printf (P_("%8d block device file\n", "%8d block device files\n", 149 ctx->fs_blockdev_count), ctx->fs_blockdev_count); 150 printf (P_("%8d fifo\n", "%8d fifos\n", ctx->fs_fifo_count), 151 ctx->fs_fifo_count); 152 printf (P_("%8d link\n", "%8d links\n", 153 ctx->fs_links_count - dir_links), 154 ctx->fs_links_count - dir_links); 155 printf (P_("%8d symbolic link", "%8d symbolic links", 156 ctx->fs_symlinks_count), ctx->fs_symlinks_count); 157 printf (P_(" (%d fast symbolic link)\n", " (%d fast symbolic links)\n", 158 ctx->fs_fast_symlinks_count), ctx->fs_fast_symlinks_count); 159 printf (P_("%8d socket\n", "%8d sockets\n", ctx->fs_sockets_count), 160 ctx->fs_sockets_count); 161 printf ("--------\n"); 162 printf (P_("%8d file\n", "%8d files\n", 163 ctx->fs_total_count - dir_links), 164 ctx->fs_total_count - dir_links); 165} 166 167static void check_mount(e2fsck_t ctx) 168{ 169 errcode_t retval; 170 int cont; 171 172 retval = ext2fs_check_if_mounted(ctx->filesystem_name, 173 &ctx->mount_flags); 174 if (retval) { 175 com_err("ext2fs_check_if_mount", retval, 176 _("while determining whether %s is mounted."), 177 ctx->filesystem_name); 178 return; 179 } 180 181 /* 182 * If the filesystem isn't mounted, or it's the root 183 * filesystem and it's mounted read-only, and we're not doing 184 * a read/write check, then everything's fine. 185 */ 186 if ((!(ctx->mount_flags & EXT2_MF_MOUNTED)) || 187 ((ctx->mount_flags & EXT2_MF_ISROOT) && 188 (ctx->mount_flags & EXT2_MF_READONLY) && 189 !(ctx->options & E2F_OPT_WRITECHECK))) 190 return; 191 192 if ((ctx->options & E2F_OPT_READONLY) && 193 !(ctx->options & E2F_OPT_WRITECHECK)) { 194 printf(_("Warning! %s is mounted.\n"), ctx->filesystem_name); 195 return; 196 } 197 198 printf(_("%s is mounted. "), ctx->filesystem_name); 199 if (!ctx->interactive) 200 fatal_error(ctx, _("Cannot continue, aborting.\n\n")); 201 printf(_("\n\n\007\007\007\007WARNING!!! " 202 "Running e2fsck on a mounted filesystem may cause\n" 203 "SEVERE filesystem damage.\007\007\007\n\n")); 204 cont = ask_yn(_("Do you really want to continue"), -1); 205 if (!cont) { 206 printf (_("check aborted.\n")); 207 exit (0); 208 } 209 return; 210} 211 212static int is_on_batt(void) 213{ 214 FILE *f; 215 DIR *d; 216 char tmp[80], tmp2[80], fname[80]; 217 unsigned int acflag; 218 struct dirent* de; 219 220 f = fopen("/proc/apm", "r"); 221 if (f) { 222 if (fscanf(f, "%s %s %s %x", tmp, tmp, tmp, &acflag) != 4) 223 acflag = 1; 224 fclose(f); 225 return (acflag != 1); 226 } 227 d = opendir("/proc/acpi/ac_adapter"); 228 if (d) { 229 while ((de=readdir(d)) != NULL) { 230 if (!strncmp(".", de->d_name, 1)) 231 continue; 232 snprintf(fname, 80, "/proc/acpi/ac_adapter/%s/state", 233 de->d_name); 234 f = fopen(fname, "r"); 235 if (!f) 236 continue; 237 if (fscanf(f, "%s %s", tmp2, tmp) != 2) 238 tmp[0] = 0; 239 fclose(f); 240 if (strncmp(tmp, "off-line", 8) == 0) { 241 closedir(d); 242 return 1; 243 } 244 } 245 closedir(d); 246 } 247 return 0; 248} 249 250/* 251 * This routine checks to see if a filesystem can be skipped; if so, 252 * it will exit with E2FSCK_OK. Under some conditions it will print a 253 * message explaining why a check is being forced. 254 */ 255static void check_if_skip(e2fsck_t ctx) 256{ 257 ext2_filsys fs = ctx->fs; 258 const char *reason = NULL; 259 unsigned int reason_arg = 0; 260 long next_check; 261 int batt = is_on_batt(); 262 263 if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file || 264 cflag || swapfs) 265 return; 266 267 if ((fs->super->s_state & EXT2_ERROR_FS) || 268 !ext2fs_test_valid(fs)) 269 reason = _(" contains a file system with errors"); 270 else if ((fs->super->s_state & EXT2_VALID_FS) == 0) 271 reason = _(" was not cleanly unmounted"); 272 else if ((fs->super->s_max_mnt_count > 0) && 273 (fs->super->s_mnt_count >= 274 (unsigned) fs->super->s_max_mnt_count)) { 275 reason = _(" has been mounted %u times without being checked"); 276 reason_arg = fs->super->s_mnt_count; 277 if (batt && (fs->super->s_mnt_count < 278 (unsigned) fs->super->s_max_mnt_count*2)) 279 reason = 0; 280 } else if (fs->super->s_checkinterval && 281 ((ctx->now - fs->super->s_lastcheck) >= 282 fs->super->s_checkinterval)) { 283 reason = _(" has gone %u days without being checked"); 284 reason_arg = (ctx->now - fs->super->s_lastcheck)/(3600*24); 285 if (batt && ((ctx->now - fs->super->s_lastcheck) < 286 fs->super->s_checkinterval*2)) 287 reason = 0; 288 } 289 if (reason) { 290 fputs(ctx->device_name, stdout); 291 printf(reason, reason_arg); 292 fputs(_(", check forced.\n"), stdout); 293 return; 294 } 295 printf(_("%s: clean, %d/%d files, %d/%d blocks"), ctx->device_name, 296 fs->super->s_inodes_count - fs->super->s_free_inodes_count, 297 fs->super->s_inodes_count, 298 fs->super->s_blocks_count - fs->super->s_free_blocks_count, 299 fs->super->s_blocks_count); 300 next_check = 100000; 301 if (fs->super->s_max_mnt_count > 0) { 302 next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count; 303 if (next_check <= 0) 304 next_check = 1; 305 } 306 if (fs->super->s_checkinterval && 307 ((ctx->now - fs->super->s_lastcheck) >= fs->super->s_checkinterval)) 308 next_check = 1; 309 if (next_check <= 5) { 310 if (next_check == 1) 311 fputs(_(" (check after next mount)"), stdout); 312 else 313 printf(_(" (check in %ld mounts)"), next_check); 314 } 315 fputc('\n', stdout); 316 ext2fs_close(fs); 317 ctx->fs = NULL; 318 e2fsck_free_context(ctx); 319 exit(FSCK_OK); 320} 321 322/* 323 * For completion notice 324 */ 325struct percent_tbl { 326 int max_pass; 327 int table[32]; 328}; 329struct percent_tbl e2fsck_tbl = { 330 5, { 0, 70, 90, 92, 95, 100 } 331}; 332static char bar[128], spaces[128]; 333 334static float calc_percent(struct percent_tbl *tbl, int pass, int curr, 335 int max) 336{ 337 float percent; 338 339 if (pass <= 0) 340 return 0.0; 341 if (pass > tbl->max_pass || max == 0) 342 return 100.0; 343 percent = ((float) curr) / ((float) max); 344 return ((percent * (tbl->table[pass] - tbl->table[pass-1])) 345 + tbl->table[pass-1]); 346} 347 348extern void e2fsck_clear_progbar(e2fsck_t ctx) 349{ 350 if (!(ctx->flags & E2F_FLAG_PROG_BAR)) 351 return; 352 353 printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80), 354 ctx->stop_meta); 355 fflush(stdout); 356 ctx->flags &= ~E2F_FLAG_PROG_BAR; 357} 358 359int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent, 360 unsigned int dpynum) 361{ 362 static const char spinner[] = "\\|/-"; 363 int i; 364 unsigned int tick; 365 struct timeval tv; 366 int dpywidth; 367 int fixed_percent; 368 369 if (ctx->flags & E2F_FLAG_PROG_SUPPRESS) 370 return 0; 371 372 /* 373 * Calculate the new progress position. If the 374 * percentage hasn't changed, then we skip out right 375 * away. 376 */ 377 fixed_percent = (int) ((10 * percent) + 0.5); 378 if (ctx->progress_last_percent == fixed_percent) 379 return 0; 380 ctx->progress_last_percent = fixed_percent; 381 382 /* 383 * If we've already updated the spinner once within 384 * the last 1/8th of a second, no point doing it 385 * again. 386 */ 387 gettimeofday(&tv, NULL); 388 tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8)); 389 if ((tick == ctx->progress_last_time) && 390 (fixed_percent != 0) && (fixed_percent != 1000)) 391 return 0; 392 ctx->progress_last_time = tick; 393 394 /* 395 * Advance the spinner, and note that the progress bar 396 * will be on the screen 397 */ 398 ctx->progress_pos = (ctx->progress_pos+1) & 3; 399 ctx->flags |= E2F_FLAG_PROG_BAR; 400 401 dpywidth = 66 - strlen(label); 402 dpywidth = 8 * (dpywidth / 8); 403 if (dpynum) 404 dpywidth -= 8; 405 406 i = ((percent * dpywidth) + 50) / 100; 407 printf("%s%s: |%s%s", ctx->start_meta, label, 408 bar + (sizeof(bar) - (i+1)), 409 spaces + (sizeof(spaces) - (dpywidth - i + 1))); 410 if (fixed_percent == 1000) 411 fputc('|', stdout); 412 else 413 fputc(spinner[ctx->progress_pos & 3], stdout); 414 printf(" %4.1f%% ", percent); 415 if (dpynum) 416 printf("%u\r", dpynum); 417 else 418 fputs(" \r", stdout); 419 fputs(ctx->stop_meta, stdout); 420 421 if (fixed_percent == 1000) 422 e2fsck_clear_progbar(ctx); 423 fflush(stdout); 424 425 return 0; 426} 427 428static int e2fsck_update_progress(e2fsck_t ctx, int pass, 429 unsigned long cur, unsigned long max) 430{ 431 char buf[80]; 432 float percent; 433 434 if (pass == 0) 435 return 0; 436 437 if (ctx->progress_fd) { 438 sprintf(buf, "%d %lu %lu\n", pass, cur, max); 439 write(ctx->progress_fd, buf, strlen(buf)); 440 } else { 441 percent = calc_percent(&e2fsck_tbl, pass, cur, max); 442 e2fsck_simple_progress(ctx, ctx->device_name, 443 percent, 0); 444 } 445 return 0; 446} 447 448#define PATH_SET "PATH=/sbin" 449 450static void reserve_stdio_fds(void) 451{ 452 int fd; 453 454 while (1) { 455 fd = open("/dev/null", O_RDWR); 456 if (fd > 2) 457 break; 458 if (fd < 0) { 459 fprintf(stderr, _("ERROR: Couldn't open " 460 "/dev/null (%s)\n"), 461 strerror(errno)); 462 break; 463 } 464 } 465 close(fd); 466} 467 468#ifdef HAVE_SIGNAL_H 469static void signal_progress_on(int sig EXT2FS_ATTR((unused))) 470{ 471 e2fsck_t ctx = e2fsck_global_ctx; 472 473 if (!ctx) 474 return; 475 476 ctx->progress = e2fsck_update_progress; 477 ctx->progress_fd = 0; 478} 479 480static void signal_progress_off(int sig EXT2FS_ATTR((unused))) 481{ 482 e2fsck_t ctx = e2fsck_global_ctx; 483 484 if (!ctx) 485 return; 486 487 e2fsck_clear_progbar(ctx); 488 ctx->progress = 0; 489} 490 491static void signal_cancel(int sig EXT2FS_ATTR((unused))) 492{ 493 e2fsck_t ctx = e2fsck_global_ctx; 494 495 if (!ctx) 496 exit(FSCK_CANCELED); 497 498 ctx->flags |= E2F_FLAG_CANCEL; 499} 500#endif 501 502static void parse_extended_opts(e2fsck_t ctx, const char *opts) 503{ 504 char *buf, *token, *next, *p, *arg; 505 int ea_ver; 506 int extended_usage = 0; 507 508 buf = string_copy(ctx, opts, 0); 509 for (token = buf; token && *token; token = next) { 510 p = strchr(token, ','); 511 next = 0; 512 if (p) { 513 *p = 0; 514 next = p+1; 515 } 516 arg = strchr(token, '='); 517 if (arg) { 518 *arg = 0; 519 arg++; 520 } 521 if (strcmp(token, "ea_ver") == 0) { 522 if (!arg) { 523 extended_usage++; 524 continue; 525 } 526 ea_ver = strtoul(arg, &p, 0); 527 if (*p || 528 ((ea_ver != 1) && (ea_ver != 2))) { 529 fprintf(stderr, 530 _("Invalid EA version.\n")); 531 extended_usage++; 532 continue; 533 } 534 ctx->ext_attr_ver = ea_ver; 535 } else { 536 fprintf(stderr, _("Unknown extended option: %s\n"), 537 token); 538 extended_usage++; 539 } 540 } 541 if (extended_usage) { 542 fputs(("\nExtended options are separated by commas, " 543 "and may take an argument which\n" 544 "is set off by an equals ('=') sign. " 545 "Valid extended options are:\n" 546 "\tea_ver=<ea_version (1 or 2)>\n\n"), stderr); 547 exit(1); 548 } 549} 550 551static const char *config_fn[] = { "/etc/e2fsck.conf", 0 }; 552 553static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx) 554{ 555 int flush = 0; 556 int c, fd; 557#ifdef MTRACE 558 extern void *mallwatch; 559#endif 560 e2fsck_t ctx; 561 errcode_t retval; 562#ifdef HAVE_SIGNAL_H 563 struct sigaction sa; 564#endif 565 char *extended_opts = 0; 566 567 retval = e2fsck_allocate_context(&ctx); 568 if (retval) 569 return retval; 570 571 *ret_ctx = ctx; 572 573 setvbuf(stdout, NULL, _IONBF, BUFSIZ); 574 setvbuf(stderr, NULL, _IONBF, BUFSIZ); 575 if (isatty(0) && isatty(1)) { 576 ctx->interactive = 1; 577 } else { 578 ctx->start_meta[0] = '\001'; 579 ctx->stop_meta[0] = '\002'; 580 } 581 memset(bar, '=', sizeof(bar)-1); 582 memset(spaces, ' ', sizeof(spaces)-1); 583 initialize_ext2_error_table(); 584 initialize_prof_error_table(); 585 blkid_get_cache(&ctx->blkid, NULL); 586 587 if (argc && *argv) 588 ctx->program_name = *argv; 589 else 590 ctx->program_name = "e2fsck"; 591 while ((c = getopt (argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDk")) != EOF) 592 switch (c) { 593 case 'C': 594 ctx->progress = e2fsck_update_progress; 595 ctx->progress_fd = atoi(optarg); 596 if (!ctx->progress_fd) 597 break; 598 /* Validate the file descriptor to avoid disasters */ 599 fd = dup(ctx->progress_fd); 600 if (fd < 0) { 601 fprintf(stderr, 602 _("Error validating file descriptor %d: %s\n"), 603 ctx->progress_fd, 604 error_message(errno)); 605 fatal_error(ctx, 606 _("Invalid completion information file descriptor")); 607 } else 608 close(fd); 609 break; 610 case 'D': 611 ctx->options |= E2F_OPT_COMPRESS_DIRS; 612 break; 613 case 'E': 614 extended_opts = optarg; 615 break; 616 case 'p': 617 case 'a': 618 if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) { 619 conflict_opt: 620 fatal_error(ctx, 621 _("Only one of the options -p/-a, -n or -y may be specified.")); 622 } 623 ctx->options |= E2F_OPT_PREEN; 624 break; 625 case 'n': 626 if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN)) 627 goto conflict_opt; 628 ctx->options |= E2F_OPT_NO; 629 break; 630 case 'y': 631 if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO)) 632 goto conflict_opt; 633 ctx->options |= E2F_OPT_YES; 634 break; 635 case 't': 636#ifdef RESOURCE_TRACK 637 if (ctx->options & E2F_OPT_TIME) 638 ctx->options |= E2F_OPT_TIME2; 639 else 640 ctx->options |= E2F_OPT_TIME; 641#else 642 fprintf(stderr, _("The -t option is not " 643 "supported on this version of e2fsck.\n")); 644#endif 645 break; 646 case 'c': 647 if (cflag++) 648 ctx->options |= E2F_OPT_WRITECHECK; 649 ctx->options |= E2F_OPT_CHECKBLOCKS; 650 break; 651 case 'r': 652 /* What we do by default, anyway! */ 653 break; 654 case 'b': 655 ctx->use_superblock = atoi(optarg); 656 ctx->flags |= E2F_FLAG_SB_SPECIFIED; 657 break; 658 case 'B': 659 ctx->blocksize = atoi(optarg); 660 break; 661 case 'I': 662 ctx->inode_buffer_blocks = atoi(optarg); 663 break; 664 case 'j': 665 ctx->journal_name = string_copy(ctx, optarg, 0); 666 break; 667 case 'P': 668 ctx->process_inode_size = atoi(optarg); 669 break; 670 case 'L': 671 replace_bad_blocks++; 672 case 'l': 673 bad_blocks_file = string_copy(ctx, optarg, 0); 674 break; 675 case 'd': 676 ctx->options |= E2F_OPT_DEBUG; 677 break; 678 case 'f': 679 ctx->options |= E2F_OPT_FORCE; 680 break; 681 case 'F': 682 flush = 1; 683 break; 684 case 'v': 685 verbose = 1; 686 break; 687 case 'V': 688 show_version_only = 1; 689 break; 690#ifdef MTRACE 691 case 'M': 692 mallwatch = (void *) strtol(optarg, NULL, 0); 693 break; 694#endif 695 case 'N': 696 ctx->device_name = optarg; 697 break; 698#ifdef ENABLE_SWAPFS 699 case 's': 700 normalize_swapfs = 1; 701 case 'S': 702 swapfs = 1; 703 break; 704#else 705 case 's': 706 case 'S': 707 fprintf(stderr, _("Byte-swapping filesystems " 708 "not compiled in this version " 709 "of e2fsck\n")); 710 exit(1); 711#endif 712 case 'k': 713 keep_bad_blocks++; 714 break; 715 default: 716 usage(ctx); 717 } 718 if (show_version_only) 719 return 0; 720 if (optind != argc - 1) 721 usage(ctx); 722 if ((ctx->options & E2F_OPT_NO) && !bad_blocks_file && 723 !cflag && !swapfs && !(ctx->options & E2F_OPT_COMPRESS_DIRS)) 724 ctx->options |= E2F_OPT_READONLY; 725 ctx->io_options = strchr(argv[optind], '?'); 726 if (ctx->io_options) 727 *ctx->io_options++ = 0; 728 ctx->filesystem_name = blkid_get_devname(ctx->blkid, argv[optind], 0); 729 if (!ctx->filesystem_name) { 730 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"), 731 argv[optind]); 732 fatal_error(ctx, 0); 733 } 734 if (extended_opts) 735 parse_extended_opts(ctx, extended_opts); 736 737 profile_init(config_fn, &ctx->profile); 738 739 if (flush) { 740 fd = open(ctx->filesystem_name, O_RDONLY, 0); 741 if (fd < 0) { 742 com_err("open", errno, 743 _("while opening %s for flushing"), 744 ctx->filesystem_name); 745 fatal_error(ctx, 0); 746 } 747 if ((retval = ext2fs_sync_device(fd, 1))) { 748 com_err("ext2fs_sync_device", retval, 749 _("while trying to flush %s"), 750 ctx->filesystem_name); 751 fatal_error(ctx, 0); 752 } 753 close(fd); 754 } 755#ifdef ENABLE_SWAPFS 756 if (swapfs) { 757 if (cflag || bad_blocks_file) { 758 fprintf(stderr, _("Incompatible options not " 759 "allowed when byte-swapping.\n")); 760 exit(FSCK_USAGE); 761 } 762 } 763#endif 764 if (cflag && bad_blocks_file) { 765 fprintf(stderr, _("The -c and the -l/-L options may " 766 "not be both used at the same time.\n")); 767 exit(FSCK_USAGE); 768 } 769#ifdef HAVE_SIGNAL_H 770 /* 771 * Set up signal action 772 */ 773 memset(&sa, 0, sizeof(struct sigaction)); 774 sa.sa_handler = signal_cancel; 775 sigaction(SIGINT, &sa, 0); 776 sigaction(SIGTERM, &sa, 0); 777#ifdef SA_RESTART 778 sa.sa_flags = SA_RESTART; 779#endif 780 e2fsck_global_ctx = ctx; 781 sa.sa_handler = signal_progress_on; 782 sigaction(SIGUSR1, &sa, 0); 783 sa.sa_handler = signal_progress_off; 784 sigaction(SIGUSR2, &sa, 0); 785#endif 786 787 /* Update our PATH to include /sbin if we need to run badblocks */ 788 if (cflag) { 789 char *oldpath = getenv("PATH"); 790 if (oldpath) { 791 char *newpath; 792 793 newpath = (char *) malloc(sizeof (PATH_SET) + 1 + 794 strlen (oldpath)); 795 if (!newpath) 796 fatal_error(ctx, "Couldn't malloc() newpath"); 797 strcpy (newpath, PATH_SET); 798 strcat (newpath, ":"); 799 strcat (newpath, oldpath); 800 putenv (newpath); 801 } else 802 putenv (PATH_SET); 803 } 804#ifdef CONFIG_JBD_DEBUG 805 if (getenv("E2FSCK_JBD_DEBUG")) 806 journal_enable_debug = atoi(getenv("E2FSCK_JBD_DEBUG")); 807#endif 808 return 0; 809} 810 811static const char *my_ver_string = E2FSPROGS_VERSION; 812static const char *my_ver_date = E2FSPROGS_DATE; 813 814int main (int argc, char *argv[]) 815{ 816 errcode_t retval = 0; 817 int exit_value = FSCK_OK; 818 ext2_filsys fs = 0; 819 io_manager io_ptr; 820 struct ext2_super_block *sb; 821 const char *lib_ver_date; 822 int my_ver, lib_ver; 823 e2fsck_t ctx; 824 struct problem_context pctx; 825 int flags, run_result; 826 827 clear_problem_context(&pctx); 828#ifdef MTRACE 829 mtrace(); 830#endif 831#ifdef MCHECK 832 mcheck(0); 833#endif 834#ifdef ENABLE_NLS 835 setlocale(LC_MESSAGES, ""); 836 setlocale(LC_CTYPE, ""); 837 bindtextdomain(NLS_CAT_NAME, LOCALEDIR); 838 textdomain(NLS_CAT_NAME); 839#endif 840 my_ver = ext2fs_parse_version_string(my_ver_string); 841 lib_ver = ext2fs_get_library_version(0, &lib_ver_date); 842 if (my_ver > lib_ver) { 843 fprintf( stderr, _("Error: ext2fs library version " 844 "out of date!\n")); 845 show_version_only++; 846 } 847 848 retval = PRS(argc, argv, &ctx); 849 if (retval) { 850 com_err("e2fsck", retval, 851 _("while trying to initialize program")); 852 exit(FSCK_ERROR); 853 } 854 reserve_stdio_fds(); 855 856#ifdef RESOURCE_TRACK 857 init_resource_track(&ctx->global_rtrack); 858#endif 859 860 if (!(ctx->options & E2F_OPT_PREEN) || show_version_only) 861 fprintf(stderr, "e2fsck %s (%s)\n", my_ver_string, 862 my_ver_date); 863 864 if (show_version_only) { 865 fprintf(stderr, _("\tUsing %s, %s\n"), 866 error_message(EXT2_ET_BASE), lib_ver_date); 867 exit(FSCK_OK); 868 } 869 870 check_mount(ctx); 871 872 if (!(ctx->options & E2F_OPT_PREEN) && 873 !(ctx->options & E2F_OPT_NO) && 874 !(ctx->options & E2F_OPT_YES)) { 875 if (!ctx->interactive) 876 fatal_error(ctx, 877 _("need terminal for interactive repairs")); 878 } 879 ctx->superblock = ctx->use_superblock; 880restart: 881#ifdef CONFIG_TESTIO_DEBUG 882 io_ptr = test_io_manager; 883 test_io_backing_manager = unix_io_manager; 884#else 885 io_ptr = unix_io_manager; 886#endif 887 flags = 0; 888 if ((ctx->options & E2F_OPT_READONLY) == 0) 889 flags |= EXT2_FLAG_RW; 890 891 if (ctx->superblock && ctx->blocksize) { 892 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options, 893 flags, ctx->superblock, ctx->blocksize, 894 io_ptr, &fs); 895 } else if (ctx->superblock) { 896 int blocksize; 897 for (blocksize = EXT2_MIN_BLOCK_SIZE; 898 blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) { 899 retval = ext2fs_open2(ctx->filesystem_name, 900 ctx->io_options, flags, 901 ctx->superblock, blocksize, 902 io_ptr, &fs); 903 if (!retval) 904 break; 905 } 906 } else 907 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options, 908 flags, 0, 0, io_ptr, &fs); 909 if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) && 910 !(ctx->flags & E2F_FLAG_SB_SPECIFIED) && 911 ((retval == EXT2_ET_BAD_MAGIC) || 912 ((retval == 0) && ext2fs_check_desc(fs)))) { 913 if (!fs || (fs->group_desc_count > 1)) { 914 printf(_("%s trying backup blocks...\n"), 915 retval ? _("Couldn't find ext2 superblock,") : 916 _("Group descriptors look bad...")); 917 get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr); 918 if (fs) 919 ext2fs_close(fs); 920 goto restart; 921 } 922 } 923 if (retval) { 924 com_err(ctx->program_name, retval, _("while trying to open %s"), 925 ctx->filesystem_name); 926 if (retval == EXT2_ET_REV_TOO_HIGH) { 927 printf(_("The filesystem revision is apparently " 928 "too high for this version of e2fsck.\n" 929 "(Or the filesystem superblock " 930 "is corrupt)\n\n")); 931 fix_problem(ctx, PR_0_SB_CORRUPT, &pctx); 932 } else if (retval == EXT2_ET_SHORT_READ) 933 printf(_("Could this be a zero-length partition?\n")); 934 else if ((retval == EPERM) || (retval == EACCES)) 935 printf(_("You must have %s access to the " 936 "filesystem or be root\n"), 937 (ctx->options & E2F_OPT_READONLY) ? 938 "r/o" : "r/w"); 939 else if (retval == ENXIO) 940 printf(_("Possibly non-existent or swap device?\n")); 941#ifdef EROFS 942 else if (retval == EROFS) 943 printf(_("Disk write-protected; use the -n option " 944 "to do a read-only\n" 945 "check of the device.\n")); 946#endif 947 else 948 fix_problem(ctx, PR_0_SB_CORRUPT, &pctx); 949 fatal_error(ctx, 0); 950 } 951 ctx->fs = fs; 952 fs->priv_data = ctx; 953 fs->now = ctx->now; 954 sb = fs->super; 955 if (sb->s_rev_level > E2FSCK_CURRENT_REV) { 956 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH, 957 _("while trying to open %s"), 958 ctx->filesystem_name); 959 get_newer: 960 fatal_error(ctx, _("Get a newer version of e2fsck!")); 961 } 962 963 /* 964 * Set the device name, which is used whenever we print error 965 * or informational messages to the user. 966 */ 967 if (ctx->device_name == 0 && 968 (sb->s_volume_name[0] != 0)) { 969 ctx->device_name = string_copy(ctx, sb->s_volume_name, 970 sizeof(sb->s_volume_name)); 971 } 972 if (ctx->device_name == 0) 973 ctx->device_name = ctx->filesystem_name; 974 975 /* 976 * Make sure the ext3 superblock fields are consistent. 977 */ 978 retval = e2fsck_check_ext3_journal(ctx); 979 if (retval) { 980 com_err(ctx->program_name, retval, 981 _("while checking ext3 journal for %s"), 982 ctx->device_name); 983 fatal_error(ctx, 0); 984 } 985 986 /* 987 * Check to see if we need to do ext3-style recovery. If so, 988 * do it, and then restart the fsck. 989 */ 990 if (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) { 991 if (ctx->options & E2F_OPT_READONLY) { 992 printf(_("Warning: skipping journal recovery " 993 "because doing a read-only filesystem " 994 "check.\n")); 995 io_channel_flush(ctx->fs->io); 996 } else { 997 if (ctx->flags & E2F_FLAG_RESTARTED) { 998 /* 999 * Whoops, we attempted to run the 1000 * journal twice. This should never 1001 * happen, unless the hardware or 1002 * device driver is being bogus. 1003 */ 1004 com_err(ctx->program_name, 0, 1005 _("unable to set superblock flags on %s\n"), ctx->device_name); 1006 fatal_error(ctx, 0); 1007 } 1008 retval = e2fsck_run_ext3_journal(ctx); 1009 if (retval) { 1010 com_err(ctx->program_name, retval, 1011 _("while recovering ext3 journal of %s"), 1012 ctx->device_name); 1013 fatal_error(ctx, 0); 1014 } 1015 ext2fs_close(ctx->fs); 1016 ctx->fs = 0; 1017 ctx->flags |= E2F_FLAG_RESTARTED; 1018 goto restart; 1019 } 1020 } 1021 1022 /* 1023 * Check for compatibility with the feature sets. We need to 1024 * be more stringent than ext2fs_open(). 1025 */ 1026 if ((sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) || 1027 (sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP)) { 1028 com_err(ctx->program_name, EXT2_ET_UNSUPP_FEATURE, 1029 "(%s)", ctx->device_name); 1030 goto get_newer; 1031 } 1032 if (sb->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) { 1033 com_err(ctx->program_name, EXT2_ET_RO_UNSUPP_FEATURE, 1034 "(%s)", ctx->device_name); 1035 goto get_newer; 1036 } 1037#ifdef ENABLE_COMPRESSION 1038 if (sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_COMPRESSION) 1039 com_err(ctx->program_name, 0, 1040 _("Warning: compression support is experimental.\n")); 1041#endif 1042#ifndef ENABLE_HTREE 1043 if (sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) { 1044 com_err(ctx->program_name, 0, 1045 _("E2fsck not compiled with HTREE support,\n\t" 1046 "but filesystem %s has HTREE directories.\n"), 1047 ctx->device_name); 1048 goto get_newer; 1049 } 1050#endif 1051 1052 /* 1053 * If the user specified a specific superblock, presumably the 1054 * master superblock has been trashed. So we mark the 1055 * superblock as dirty, so it can be written out. 1056 */ 1057 if (ctx->superblock && 1058 !(ctx->options & E2F_OPT_READONLY)) 1059 ext2fs_mark_super_dirty(fs); 1060 1061 /* 1062 * We only update the master superblock because (a) paranoia; 1063 * we don't want to corrupt the backup superblocks, and (b) we 1064 * don't need to update the mount count and last checked 1065 * fields in the backup superblock (the kernel doesn't 1066 * update the backup superblocks anyway). 1067 */ 1068 fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; 1069 1070 ehandler_init(fs->io); 1071 1072 if (ctx->superblock) 1073 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0); 1074 ext2fs_mark_valid(fs); 1075 check_super_block(ctx); 1076 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 1077 fatal_error(ctx, 0); 1078 check_if_skip(ctx); 1079 if (bad_blocks_file) 1080 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks); 1081 else if (cflag) 1082 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */ 1083 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 1084 fatal_error(ctx, 0); 1085#ifdef ENABLE_SWAPFS 1086 if (normalize_swapfs) { 1087 if ((fs->flags & EXT2_FLAG_SWAP_BYTES) == 1088 ext2fs_native_flag()) { 1089 fprintf(stderr, _("%s: Filesystem byte order " 1090 "already normalized.\n"), ctx->device_name); 1091 fatal_error(ctx, 0); 1092 } 1093 } 1094 if (swapfs) { 1095 swap_filesys(ctx); 1096 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 1097 fatal_error(ctx, 0); 1098 } 1099#endif 1100 1101 /* 1102 * Mark the system as valid, 'til proven otherwise 1103 */ 1104 ext2fs_mark_valid(fs); 1105 1106 retval = ext2fs_read_bb_inode(fs, &fs->badblocks); 1107 if (retval) { 1108 com_err(ctx->program_name, retval, 1109 _("while reading bad blocks inode")); 1110 preenhalt(ctx); 1111 printf(_("This doesn't bode well," 1112 " but we'll try to go on...\n")); 1113 } 1114 1115 run_result = e2fsck_run(ctx); 1116 e2fsck_clear_progbar(ctx); 1117 if (run_result == E2F_FLAG_RESTART) { 1118 printf(_("Restarting e2fsck from the beginning...\n")); 1119 retval = e2fsck_reset_context(ctx); 1120 if (retval) { 1121 com_err(ctx->program_name, retval, 1122 _("while resetting context")); 1123 fatal_error(ctx, 0); 1124 } 1125 ext2fs_close(fs); 1126 goto restart; 1127 } 1128 if (run_result & E2F_FLAG_CANCEL) { 1129 printf(_("%s: e2fsck canceled.\n"), ctx->device_name ? 1130 ctx->device_name : ctx->filesystem_name); 1131 exit_value |= FSCK_CANCELED; 1132 } 1133 if (run_result & E2F_FLAG_ABORT) 1134 fatal_error(ctx, _("aborted")); 1135 1136#ifdef MTRACE 1137 mtrace_print("Cleanup"); 1138#endif 1139 if (ext2fs_test_changed(fs)) { 1140 exit_value |= FSCK_NONDESTRUCT; 1141 if (!(ctx->options & E2F_OPT_PREEN)) 1142 printf(_("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"), 1143 ctx->device_name); 1144 if (ctx->mount_flags & EXT2_MF_ISROOT) { 1145 printf(_("%s: ***** REBOOT LINUX *****\n"), 1146 ctx->device_name); 1147 exit_value |= FSCK_REBOOT; 1148 } 1149 } 1150 if (!ext2fs_test_valid(fs)) { 1151 printf(_("\n%s: ********** WARNING: Filesystem still has " 1152 "errors **********\n\n"), ctx->device_name); 1153 exit_value |= FSCK_UNCORRECTED; 1154 exit_value &= ~FSCK_NONDESTRUCT; 1155 } 1156 if (exit_value & FSCK_CANCELED) 1157 exit_value &= ~FSCK_NONDESTRUCT; 1158 else { 1159 show_stats(ctx); 1160 if (!(ctx->options & E2F_OPT_READONLY)) { 1161 if (ext2fs_test_valid(fs)) { 1162 if (!(sb->s_state & EXT2_VALID_FS)) 1163 exit_value |= FSCK_NONDESTRUCT; 1164 sb->s_state = EXT2_VALID_FS; 1165 } else 1166 sb->s_state &= ~EXT2_VALID_FS; 1167 sb->s_mnt_count = 0; 1168 sb->s_lastcheck = ctx->now; 1169 ext2fs_mark_super_dirty(fs); 1170 } 1171 } 1172 1173 e2fsck_write_bitmaps(ctx); 1174 1175 ext2fs_close(fs); 1176 ctx->fs = NULL; 1177 free(ctx->filesystem_name); 1178 free(ctx->journal_name); 1179 1180#ifdef RESOURCE_TRACK 1181 if (ctx->options & E2F_OPT_TIME) 1182 print_resource_track(NULL, &ctx->global_rtrack); 1183#endif 1184 e2fsck_free_context(ctx); 1185 return exit_value; 1186} 1187