unix.c revision 6d96b00d57d236e2746f8245df6c8ea64abc64c1
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 ext2_ino_t inodes, inodes_used; 102 blk_t blocks, blocks_used; 103 int dir_links; 104 int num_files, num_links; 105 int frag_percent; 106 107 dir_links = 2 * ctx->fs_directory_count - 1; 108 num_files = ctx->fs_total_count - dir_links; 109 num_links = ctx->fs_links_count - dir_links; 110 inodes = fs->super->s_inodes_count; 111 inodes_used = (fs->super->s_inodes_count - 112 fs->super->s_free_inodes_count); 113 blocks = fs->super->s_blocks_count; 114 blocks_used = (fs->super->s_blocks_count - 115 fs->super->s_free_blocks_count); 116 117 frag_percent = (10000 * ctx->fs_fragmented) / inodes_used; 118 frag_percent = (frag_percent + 5) / 10; 119 120 if (!verbose) { 121 printf(_("%s: %u/%u files (%0d.%d%% non-contiguous), %u/%u blocks\n"), 122 ctx->device_name, inodes_used, inodes, 123 frag_percent / 10, frag_percent % 10, 124 blocks_used, blocks); 125 return; 126 } 127 printf (P_("\n%8u inode used (%2.2f%%)\n", "\n%8u inodes used (%2.2f%%)\n", 128 inodes_used), inodes_used, 100.0 * inodes_used / inodes); 129 printf (P_("%8u non-contiguous inode (%0d.%d%%)\n", 130 "%8u non-contiguous inodes (%0d.%d%%)\n", 131 ctx->fs_fragmented), 132 ctx->fs_fragmented, frag_percent / 10, frag_percent % 10); 133 printf (_(" # of inodes with ind/dind/tind blocks: %u/%u/%u\n"), 134 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count); 135 printf (P_("%8u block used (%2.2f%%)\n", "%8u blocks used (%2.2f%%)\n", 136 blocks_used), blocks_used, 100.0 * blocks_used / blocks); 137 printf (P_("%8u bad block\n", "%8u bad blocks\n", 138 ctx->fs_badblocks_count), ctx->fs_badblocks_count); 139 printf (P_("%8u large file\n", "%8u large files\n", 140 ctx->large_files), ctx->large_files); 141 printf (P_("\n%8u regular file\n", "\n%8u regular files\n", 142 ctx->fs_regular_count), ctx->fs_regular_count); 143 printf (P_("%8u directory\n", "%8u directories\n", 144 ctx->fs_directory_count), ctx->fs_directory_count); 145 printf (P_("%8u character device file\n", 146 "%8u character device files\n", ctx->fs_chardev_count), 147 ctx->fs_chardev_count); 148 printf (P_("%8u block device file\n", "%8u block device files\n", 149 ctx->fs_blockdev_count), ctx->fs_blockdev_count); 150 printf (P_("%8u fifo\n", "%8u fifos\n", ctx->fs_fifo_count), 151 ctx->fs_fifo_count); 152 printf (P_("%8u link\n", "%8u links\n", 153 ctx->fs_links_count - dir_links), 154 ctx->fs_links_count - dir_links); 155 printf (P_("%8u symbolic link", "%8u symbolic links", 156 ctx->fs_symlinks_count), ctx->fs_symlinks_count); 157 printf (P_(" (%u fast symbolic link)\n", " (%u fast symbolic links)\n", 158 ctx->fs_fast_symlinks_count), ctx->fs_fast_symlinks_count); 159 printf (P_("%8u socket\n", "%8u sockets\n", ctx->fs_sockets_count), 160 ctx->fs_sockets_count); 161 printf ("--------\n"); 162 printf (P_("%8u file\n", "%8u 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 int defer_check_on_battery; 263 264 profile_get_boolean(ctx->profile, "options", 265 "defer_check_on_battery", 0, 1, 266 &defer_check_on_battery); 267 if (!defer_check_on_battery) 268 batt = 0; 269 270 if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file || 271 cflag || swapfs) 272 return; 273 274 if ((fs->super->s_state & EXT2_ERROR_FS) || 275 !ext2fs_test_valid(fs)) 276 reason = _(" contains a file system with errors"); 277 else if ((fs->super->s_state & EXT2_VALID_FS) == 0) 278 reason = _(" was not cleanly unmounted"); 279 else if ((fs->super->s_max_mnt_count > 0) && 280 (fs->super->s_mnt_count >= 281 (unsigned) fs->super->s_max_mnt_count)) { 282 reason = _(" has been mounted %u times without being checked"); 283 reason_arg = fs->super->s_mnt_count; 284 if (batt && (fs->super->s_mnt_count < 285 (unsigned) fs->super->s_max_mnt_count*2)) 286 reason = 0; 287 } else if (fs->super->s_checkinterval && 288 ((ctx->now - fs->super->s_lastcheck) >= 289 fs->super->s_checkinterval)) { 290 reason = _(" has gone %u days without being checked"); 291 reason_arg = (ctx->now - fs->super->s_lastcheck)/(3600*24); 292 if (batt && ((ctx->now - fs->super->s_lastcheck) < 293 fs->super->s_checkinterval*2)) 294 reason = 0; 295 } 296 if (reason) { 297 fputs(ctx->device_name, stdout); 298 printf(reason, reason_arg); 299 fputs(_(", check forced.\n"), stdout); 300 return; 301 } 302 printf(_("%s: clean, %u/%u files, %u/%u blocks"), ctx->device_name, 303 fs->super->s_inodes_count - fs->super->s_free_inodes_count, 304 fs->super->s_inodes_count, 305 fs->super->s_blocks_count - fs->super->s_free_blocks_count, 306 fs->super->s_blocks_count); 307 next_check = 100000; 308 if (fs->super->s_max_mnt_count > 0) { 309 next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count; 310 if (next_check <= 0) 311 next_check = 1; 312 } 313 if (fs->super->s_checkinterval && 314 ((ctx->now - fs->super->s_lastcheck) >= fs->super->s_checkinterval)) 315 next_check = 1; 316 if (next_check <= 5) { 317 if (next_check == 1) { 318 if (batt) 319 fputs(_(" (check deferred; on battery)"), 320 stdout); 321 else 322 fputs(_(" (check after next mount)"), stdout); 323 } else 324 printf(_(" (check in %ld mounts)"), next_check); 325 } 326 fputc('\n', stdout); 327 ext2fs_close(fs); 328 ctx->fs = NULL; 329 e2fsck_free_context(ctx); 330 exit(FSCK_OK); 331} 332 333/* 334 * For completion notice 335 */ 336struct percent_tbl { 337 int max_pass; 338 int table[32]; 339}; 340struct percent_tbl e2fsck_tbl = { 341 5, { 0, 70, 90, 92, 95, 100 } 342}; 343static char bar[128], spaces[128]; 344 345static float calc_percent(struct percent_tbl *tbl, int pass, int curr, 346 int max) 347{ 348 float percent; 349 350 if (pass <= 0) 351 return 0.0; 352 if (pass > tbl->max_pass || max == 0) 353 return 100.0; 354 percent = ((float) curr) / ((float) max); 355 return ((percent * (tbl->table[pass] - tbl->table[pass-1])) 356 + tbl->table[pass-1]); 357} 358 359extern void e2fsck_clear_progbar(e2fsck_t ctx) 360{ 361 if (!(ctx->flags & E2F_FLAG_PROG_BAR)) 362 return; 363 364 printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80), 365 ctx->stop_meta); 366 fflush(stdout); 367 ctx->flags &= ~E2F_FLAG_PROG_BAR; 368} 369 370int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent, 371 unsigned int dpynum) 372{ 373 static const char spinner[] = "\\|/-"; 374 int i; 375 unsigned int tick; 376 struct timeval tv; 377 int dpywidth; 378 int fixed_percent; 379 380 if (ctx->flags & E2F_FLAG_PROG_SUPPRESS) 381 return 0; 382 383 /* 384 * Calculate the new progress position. If the 385 * percentage hasn't changed, then we skip out right 386 * away. 387 */ 388 fixed_percent = (int) ((10 * percent) + 0.5); 389 if (ctx->progress_last_percent == fixed_percent) 390 return 0; 391 ctx->progress_last_percent = fixed_percent; 392 393 /* 394 * If we've already updated the spinner once within 395 * the last 1/8th of a second, no point doing it 396 * again. 397 */ 398 gettimeofday(&tv, NULL); 399 tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8)); 400 if ((tick == ctx->progress_last_time) && 401 (fixed_percent != 0) && (fixed_percent != 1000)) 402 return 0; 403 ctx->progress_last_time = tick; 404 405 /* 406 * Advance the spinner, and note that the progress bar 407 * will be on the screen 408 */ 409 ctx->progress_pos = (ctx->progress_pos+1) & 3; 410 ctx->flags |= E2F_FLAG_PROG_BAR; 411 412 dpywidth = 66 - strlen(label); 413 dpywidth = 8 * (dpywidth / 8); 414 if (dpynum) 415 dpywidth -= 8; 416 417 i = ((percent * dpywidth) + 50) / 100; 418 printf("%s%s: |%s%s", ctx->start_meta, label, 419 bar + (sizeof(bar) - (i+1)), 420 spaces + (sizeof(spaces) - (dpywidth - i + 1))); 421 if (fixed_percent == 1000) 422 fputc('|', stdout); 423 else 424 fputc(spinner[ctx->progress_pos & 3], stdout); 425 printf(" %4.1f%% ", percent); 426 if (dpynum) 427 printf("%u\r", dpynum); 428 else 429 fputs(" \r", stdout); 430 fputs(ctx->stop_meta, stdout); 431 432 if (fixed_percent == 1000) 433 e2fsck_clear_progbar(ctx); 434 fflush(stdout); 435 436 return 0; 437} 438 439static int e2fsck_update_progress(e2fsck_t ctx, int pass, 440 unsigned long cur, unsigned long max) 441{ 442 char buf[80]; 443 float percent; 444 445 if (pass == 0) 446 return 0; 447 448 if (ctx->progress_fd) { 449 sprintf(buf, "%d %lu %lu\n", pass, cur, max); 450 write(ctx->progress_fd, buf, strlen(buf)); 451 } else { 452 percent = calc_percent(&e2fsck_tbl, pass, cur, max); 453 e2fsck_simple_progress(ctx, ctx->device_name, 454 percent, 0); 455 } 456 return 0; 457} 458 459#define PATH_SET "PATH=/sbin" 460 461static void reserve_stdio_fds(void) 462{ 463 int fd; 464 465 while (1) { 466 fd = open("/dev/null", O_RDWR); 467 if (fd > 2) 468 break; 469 if (fd < 0) { 470 fprintf(stderr, _("ERROR: Couldn't open " 471 "/dev/null (%s)\n"), 472 strerror(errno)); 473 break; 474 } 475 } 476 close(fd); 477} 478 479#ifdef HAVE_SIGNAL_H 480static void signal_progress_on(int sig EXT2FS_ATTR((unused))) 481{ 482 e2fsck_t ctx = e2fsck_global_ctx; 483 484 if (!ctx) 485 return; 486 487 ctx->progress = e2fsck_update_progress; 488 ctx->progress_fd = 0; 489} 490 491static void signal_progress_off(int sig EXT2FS_ATTR((unused))) 492{ 493 e2fsck_t ctx = e2fsck_global_ctx; 494 495 if (!ctx) 496 return; 497 498 e2fsck_clear_progbar(ctx); 499 ctx->progress = 0; 500} 501 502static void signal_cancel(int sig EXT2FS_ATTR((unused))) 503{ 504 e2fsck_t ctx = e2fsck_global_ctx; 505 506 if (!ctx) 507 exit(FSCK_CANCELED); 508 509 ctx->flags |= E2F_FLAG_CANCEL; 510} 511#endif 512 513static void parse_extended_opts(e2fsck_t ctx, const char *opts) 514{ 515 char *buf, *token, *next, *p, *arg; 516 int ea_ver; 517 int extended_usage = 0; 518 519 buf = string_copy(ctx, opts, 0); 520 for (token = buf; token && *token; token = next) { 521 p = strchr(token, ','); 522 next = 0; 523 if (p) { 524 *p = 0; 525 next = p+1; 526 } 527 arg = strchr(token, '='); 528 if (arg) { 529 *arg = 0; 530 arg++; 531 } 532 if (strcmp(token, "ea_ver") == 0) { 533 if (!arg) { 534 extended_usage++; 535 continue; 536 } 537 ea_ver = strtoul(arg, &p, 0); 538 if (*p || 539 ((ea_ver != 1) && (ea_ver != 2))) { 540 fprintf(stderr, 541 _("Invalid EA version.\n")); 542 extended_usage++; 543 continue; 544 } 545 ctx->ext_attr_ver = ea_ver; 546 } else { 547 fprintf(stderr, _("Unknown extended option: %s\n"), 548 token); 549 extended_usage++; 550 } 551 } 552 free(buf); 553 554 if (extended_usage) { 555 fputs(("\nExtended options are separated by commas, " 556 "and may take an argument which\n" 557 "is set off by an equals ('=') sign. " 558 "Valid extended options are:\n" 559 "\tea_ver=<ea_version (1 or 2)>\n\n"), stderr); 560 exit(1); 561 } 562} 563 564static void syntax_err_report(const char *filename, long err, int line_num) 565{ 566 fprintf(stderr, 567 _("Syntax error in e2fsck config file (%s, line #%d)\n\t%s\n"), 568 filename, line_num, error_message(err)); 569 exit(FSCK_ERROR); 570} 571 572static const char *config_fn[] = { ROOT_SYSCONFDIR "/e2fsck.conf", 0 }; 573 574static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx) 575{ 576 int flush = 0; 577 int c, fd; 578#ifdef MTRACE 579 extern void *mallwatch; 580#endif 581 e2fsck_t ctx; 582 errcode_t retval; 583#ifdef HAVE_SIGNAL_H 584 struct sigaction sa; 585#endif 586 char *extended_opts = 0; 587 char *cp; 588 589 retval = e2fsck_allocate_context(&ctx); 590 if (retval) 591 return retval; 592 593 *ret_ctx = ctx; 594 595 setvbuf(stdout, NULL, _IONBF, BUFSIZ); 596 setvbuf(stderr, NULL, _IONBF, BUFSIZ); 597 if (isatty(0) && isatty(1)) { 598 ctx->interactive = 1; 599 } else { 600 ctx->start_meta[0] = '\001'; 601 ctx->stop_meta[0] = '\002'; 602 } 603 memset(bar, '=', sizeof(bar)-1); 604 memset(spaces, ' ', sizeof(spaces)-1); 605 add_error_table(&et_ext2_error_table); 606 add_error_table(&et_prof_error_table); 607 blkid_get_cache(&ctx->blkid, NULL); 608 609 if (argc && *argv) 610 ctx->program_name = *argv; 611 else 612 ctx->program_name = "e2fsck"; 613 while ((c = getopt (argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDk")) != EOF) 614 switch (c) { 615 case 'C': 616 ctx->progress = e2fsck_update_progress; 617 ctx->progress_fd = atoi(optarg); 618 if (!ctx->progress_fd) 619 break; 620 /* Validate the file descriptor to avoid disasters */ 621 fd = dup(ctx->progress_fd); 622 if (fd < 0) { 623 fprintf(stderr, 624 _("Error validating file descriptor %d: %s\n"), 625 ctx->progress_fd, 626 error_message(errno)); 627 fatal_error(ctx, 628 _("Invalid completion information file descriptor")); 629 } else 630 close(fd); 631 break; 632 case 'D': 633 ctx->options |= E2F_OPT_COMPRESS_DIRS; 634 break; 635 case 'E': 636 extended_opts = optarg; 637 break; 638 case 'p': 639 case 'a': 640 if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) { 641 conflict_opt: 642 fatal_error(ctx, 643 _("Only one of the options -p/-a, -n or -y may be specified.")); 644 } 645 ctx->options |= E2F_OPT_PREEN; 646 break; 647 case 'n': 648 if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN)) 649 goto conflict_opt; 650 ctx->options |= E2F_OPT_NO; 651 break; 652 case 'y': 653 if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO)) 654 goto conflict_opt; 655 ctx->options |= E2F_OPT_YES; 656 break; 657 case 't': 658#ifdef RESOURCE_TRACK 659 if (ctx->options & E2F_OPT_TIME) 660 ctx->options |= E2F_OPT_TIME2; 661 else 662 ctx->options |= E2F_OPT_TIME; 663#else 664 fprintf(stderr, _("The -t option is not " 665 "supported on this version of e2fsck.\n")); 666#endif 667 break; 668 case 'c': 669 if (cflag++) 670 ctx->options |= E2F_OPT_WRITECHECK; 671 ctx->options |= E2F_OPT_CHECKBLOCKS; 672 break; 673 case 'r': 674 /* What we do by default, anyway! */ 675 break; 676 case 'b': 677 ctx->use_superblock = atoi(optarg); 678 ctx->flags |= E2F_FLAG_SB_SPECIFIED; 679 break; 680 case 'B': 681 ctx->blocksize = atoi(optarg); 682 break; 683 case 'I': 684 ctx->inode_buffer_blocks = atoi(optarg); 685 break; 686 case 'j': 687 ctx->journal_name = string_copy(ctx, optarg, 0); 688 break; 689 case 'P': 690 ctx->process_inode_size = atoi(optarg); 691 break; 692 case 'L': 693 replace_bad_blocks++; 694 case 'l': 695 bad_blocks_file = string_copy(ctx, optarg, 0); 696 break; 697 case 'd': 698 ctx->options |= E2F_OPT_DEBUG; 699 break; 700 case 'f': 701 ctx->options |= E2F_OPT_FORCE; 702 break; 703 case 'F': 704 flush = 1; 705 break; 706 case 'v': 707 verbose = 1; 708 break; 709 case 'V': 710 show_version_only = 1; 711 break; 712#ifdef MTRACE 713 case 'M': 714 mallwatch = (void *) strtol(optarg, NULL, 0); 715 break; 716#endif 717 case 'N': 718 ctx->device_name = optarg; 719 break; 720#ifdef ENABLE_SWAPFS 721 case 's': 722 normalize_swapfs = 1; 723 case 'S': 724 swapfs = 1; 725 break; 726#else 727 case 's': 728 case 'S': 729 fprintf(stderr, _("Byte-swapping filesystems " 730 "not compiled in this version " 731 "of e2fsck\n")); 732 exit(1); 733#endif 734 case 'k': 735 keep_bad_blocks++; 736 break; 737 default: 738 usage(ctx); 739 } 740 if (show_version_only) 741 return 0; 742 if (optind != argc - 1) 743 usage(ctx); 744 if ((ctx->options & E2F_OPT_NO) && !bad_blocks_file && 745 !cflag && !swapfs && !(ctx->options & E2F_OPT_COMPRESS_DIRS)) 746 ctx->options |= E2F_OPT_READONLY; 747 ctx->io_options = strchr(argv[optind], '?'); 748 if (ctx->io_options) 749 *ctx->io_options++ = 0; 750 ctx->filesystem_name = blkid_get_devname(ctx->blkid, argv[optind], 0); 751 if (!ctx->filesystem_name) { 752 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"), 753 argv[optind]); 754 fatal_error(ctx, 0); 755 } 756 if (extended_opts) 757 parse_extended_opts(ctx, extended_opts); 758 759 if ((cp = getenv("E2FSCK_CONFIG")) != NULL) 760 config_fn[0] = cp; 761 profile_set_syntax_err_cb(syntax_err_report); 762 profile_init(config_fn, &ctx->profile); 763 764 if (flush) { 765 fd = open(ctx->filesystem_name, O_RDONLY, 0); 766 if (fd < 0) { 767 com_err("open", errno, 768 _("while opening %s for flushing"), 769 ctx->filesystem_name); 770 fatal_error(ctx, 0); 771 } 772 if ((retval = ext2fs_sync_device(fd, 1))) { 773 com_err("ext2fs_sync_device", retval, 774 _("while trying to flush %s"), 775 ctx->filesystem_name); 776 fatal_error(ctx, 0); 777 } 778 close(fd); 779 } 780#ifdef ENABLE_SWAPFS 781 if (swapfs) { 782 if (cflag || bad_blocks_file) { 783 fprintf(stderr, _("Incompatible options not " 784 "allowed when byte-swapping.\n")); 785 exit(FSCK_USAGE); 786 } 787 } 788#endif 789 if (cflag && bad_blocks_file) { 790 fprintf(stderr, _("The -c and the -l/-L options may " 791 "not be both used at the same time.\n")); 792 exit(FSCK_USAGE); 793 } 794#ifdef HAVE_SIGNAL_H 795 /* 796 * Set up signal action 797 */ 798 memset(&sa, 0, sizeof(struct sigaction)); 799 sa.sa_handler = signal_cancel; 800 sigaction(SIGINT, &sa, 0); 801 sigaction(SIGTERM, &sa, 0); 802#ifdef SA_RESTART 803 sa.sa_flags = SA_RESTART; 804#endif 805 e2fsck_global_ctx = ctx; 806 sa.sa_handler = signal_progress_on; 807 sigaction(SIGUSR1, &sa, 0); 808 sa.sa_handler = signal_progress_off; 809 sigaction(SIGUSR2, &sa, 0); 810#endif 811 812 /* Update our PATH to include /sbin if we need to run badblocks */ 813 if (cflag) { 814 char *oldpath = getenv("PATH"); 815 char *newpath; 816 int len = sizeof(PATH_SET) + 1; 817 818 if (oldpath) 819 len += strlen(oldpath); 820 821 newpath = malloc(len); 822 if (!newpath) 823 fatal_error(ctx, "Couldn't malloc() newpath"); 824 strcpy(newpath, PATH_SET); 825 826 if (oldpath) { 827 strcat(newpath, ":"); 828 strcat(newpath, oldpath); 829 } 830 putenv(newpath); 831 } 832#ifdef CONFIG_JBD_DEBUG 833 if (getenv("E2FSCK_JBD_DEBUG")) 834 journal_enable_debug = atoi(getenv("E2FSCK_JBD_DEBUG")); 835#endif 836 return 0; 837} 838 839static const char *my_ver_string = E2FSPROGS_VERSION; 840static const char *my_ver_date = E2FSPROGS_DATE; 841 842int main (int argc, char *argv[]) 843{ 844 errcode_t retval = 0; 845 int exit_value = FSCK_OK; 846 ext2_filsys fs = 0; 847 io_manager io_ptr; 848 struct ext2_super_block *sb; 849 const char *lib_ver_date; 850 int my_ver, lib_ver; 851 e2fsck_t ctx; 852 struct problem_context pctx; 853 int flags, run_result; 854 int journal_size; 855 856 clear_problem_context(&pctx); 857#ifdef MTRACE 858 mtrace(); 859#endif 860#ifdef MCHECK 861 mcheck(0); 862#endif 863#ifdef ENABLE_NLS 864 setlocale(LC_MESSAGES, ""); 865 setlocale(LC_CTYPE, ""); 866 bindtextdomain(NLS_CAT_NAME, LOCALEDIR); 867 textdomain(NLS_CAT_NAME); 868#endif 869 my_ver = ext2fs_parse_version_string(my_ver_string); 870 lib_ver = ext2fs_get_library_version(0, &lib_ver_date); 871 if (my_ver > lib_ver) { 872 fprintf( stderr, _("Error: ext2fs library version " 873 "out of date!\n")); 874 show_version_only++; 875 } 876 877 retval = PRS(argc, argv, &ctx); 878 if (retval) { 879 com_err("e2fsck", retval, 880 _("while trying to initialize program")); 881 exit(FSCK_ERROR); 882 } 883 reserve_stdio_fds(); 884 885#ifdef RESOURCE_TRACK 886 init_resource_track(&ctx->global_rtrack, NULL); 887#endif 888 889 if (!(ctx->options & E2F_OPT_PREEN) || show_version_only) 890 fprintf(stderr, "e2fsck %s (%s)\n", my_ver_string, 891 my_ver_date); 892 893 if (show_version_only) { 894 fprintf(stderr, _("\tUsing %s, %s\n"), 895 error_message(EXT2_ET_BASE), lib_ver_date); 896 exit(FSCK_OK); 897 } 898 899 check_mount(ctx); 900 901 if (!(ctx->options & E2F_OPT_PREEN) && 902 !(ctx->options & E2F_OPT_NO) && 903 !(ctx->options & E2F_OPT_YES)) { 904 if (!ctx->interactive) 905 fatal_error(ctx, 906 _("need terminal for interactive repairs")); 907 } 908 ctx->superblock = ctx->use_superblock; 909restart: 910#ifdef CONFIG_TESTIO_DEBUG 911 io_ptr = test_io_manager; 912 test_io_backing_manager = unix_io_manager; 913#else 914 io_ptr = unix_io_manager; 915#endif 916 flags = 0; 917 if ((ctx->options & E2F_OPT_READONLY) == 0) 918 flags |= EXT2_FLAG_RW; 919 if ((ctx->mount_flags & EXT2_MF_MOUNTED) == 0) 920 flags |= EXT2_FLAG_EXCLUSIVE; 921 922 if (ctx->superblock && ctx->blocksize) { 923 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options, 924 flags, ctx->superblock, ctx->blocksize, 925 io_ptr, &fs); 926 } else if (ctx->superblock) { 927 int blocksize; 928 for (blocksize = EXT2_MIN_BLOCK_SIZE; 929 blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) { 930 retval = ext2fs_open2(ctx->filesystem_name, 931 ctx->io_options, flags, 932 ctx->superblock, blocksize, 933 io_ptr, &fs); 934 if (!retval) 935 break; 936 } 937 } else 938 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options, 939 flags, 0, 0, io_ptr, &fs); 940 if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) && 941 !(ctx->flags & E2F_FLAG_SB_SPECIFIED) && 942 ((retval == EXT2_ET_BAD_MAGIC) || 943 ((retval == 0) && ext2fs_check_desc(fs)))) { 944 if (!fs || (fs->group_desc_count > 1)) { 945 printf(_("%s trying backup blocks...\n"), 946 retval ? _("Couldn't find ext2 superblock,") : 947 _("Group descriptors look bad...")); 948 get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr); 949 if (fs) 950 ext2fs_close(fs); 951 goto restart; 952 } 953 } 954 if (retval) { 955 com_err(ctx->program_name, retval, _("while trying to open %s"), 956 ctx->filesystem_name); 957 if (retval == EXT2_ET_REV_TOO_HIGH) { 958 printf(_("The filesystem revision is apparently " 959 "too high for this version of e2fsck.\n" 960 "(Or the filesystem superblock " 961 "is corrupt)\n\n")); 962 fix_problem(ctx, PR_0_SB_CORRUPT, &pctx); 963 } else if (retval == EXT2_ET_SHORT_READ) 964 printf(_("Could this be a zero-length partition?\n")); 965 else if ((retval == EPERM) || (retval == EACCES)) 966 printf(_("You must have %s access to the " 967 "filesystem or be root\n"), 968 (ctx->options & E2F_OPT_READONLY) ? 969 "r/o" : "r/w"); 970 else if (retval == ENXIO) 971 printf(_("Possibly non-existent or swap device?\n")); 972 else if (retval == EBUSY) 973 printf(_("Filesystem mounted or opened exclusively " 974 "by another program?\n")); 975#ifdef EROFS 976 else if (retval == EROFS) 977 printf(_("Disk write-protected; use the -n option " 978 "to do a read-only\n" 979 "check of the device.\n")); 980#endif 981 else 982 fix_problem(ctx, PR_0_SB_CORRUPT, &pctx); 983 fatal_error(ctx, 0); 984 } 985 /* 986 * We only update the master superblock because (a) paranoia; 987 * we don't want to corrupt the backup superblocks, and (b) we 988 * don't need to update the mount count and last checked 989 * fields in the backup superblock (the kernel doesn't update 990 * the backup superblocks anyway). With newer versions of the 991 * library this flag is set by ext2fs_open2(), but we set this 992 * here just to be sure. (No, we don't support e2fsck running 993 * with some other libext2fs than the one that it was shipped 994 * with, but just in case....) 995 */ 996 fs->flags |= EXT2_FLAG_MASTER_SB_ONLY; 997 998 if (!(ctx->flags & E2F_FLAG_GOT_DEVSIZE)) { 999 __u32 blocksize = EXT2_BLOCK_SIZE(fs->super); 1000 int need_restart = 0; 1001 1002 pctx.errcode = ext2fs_get_device_size(ctx->filesystem_name, 1003 blocksize, 1004 &ctx->num_blocks); 1005 /* 1006 * The floppy driver refuses to allow anyone else to 1007 * open the device if has been opened with O_EXCL; 1008 * this is unlike other block device drivers in Linux. 1009 * To handle this, we close the filesystem and then 1010 * reopen the filesystem after we get the device size. 1011 */ 1012 if (pctx.errcode == EBUSY) { 1013 ext2fs_close(fs); 1014 need_restart++; 1015 pctx.errcode = 1016 ext2fs_get_device_size(ctx->filesystem_name, 1017 blocksize, 1018 &ctx->num_blocks); 1019 } 1020 if (pctx.errcode == EXT2_ET_UNIMPLEMENTED) 1021 ctx->num_blocks = 0; 1022 else if (pctx.errcode) { 1023 fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx); 1024 ctx->flags |= E2F_FLAG_ABORT; 1025 fatal_error(ctx, 0); 1026 } 1027 ctx->flags |= E2F_FLAG_GOT_DEVSIZE; 1028 if (need_restart) 1029 goto restart; 1030 } 1031 1032 ctx->fs = fs; 1033 fs->priv_data = ctx; 1034 fs->now = ctx->now; 1035 sb = fs->super; 1036 if (sb->s_rev_level > E2FSCK_CURRENT_REV) { 1037 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH, 1038 _("while trying to open %s"), 1039 ctx->filesystem_name); 1040 get_newer: 1041 fatal_error(ctx, _("Get a newer version of e2fsck!")); 1042 } 1043 1044 /* 1045 * Set the device name, which is used whenever we print error 1046 * or informational messages to the user. 1047 */ 1048 if (ctx->device_name == 0 && 1049 (sb->s_volume_name[0] != 0)) { 1050 ctx->device_name = string_copy(ctx, sb->s_volume_name, 1051 sizeof(sb->s_volume_name)); 1052 } 1053 if (ctx->device_name == 0) 1054 ctx->device_name = ctx->filesystem_name; 1055 1056 /* 1057 * Make sure the ext3 superblock fields are consistent. 1058 */ 1059 retval = e2fsck_check_ext3_journal(ctx); 1060 if (retval) { 1061 com_err(ctx->program_name, retval, 1062 _("while checking ext3 journal for %s"), 1063 ctx->device_name); 1064 fatal_error(ctx, 0); 1065 } 1066 1067 /* 1068 * Check to see if we need to do ext3-style recovery. If so, 1069 * do it, and then restart the fsck. 1070 */ 1071 if (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) { 1072 if (ctx->options & E2F_OPT_READONLY) { 1073 printf(_("Warning: skipping journal recovery " 1074 "because doing a read-only filesystem " 1075 "check.\n")); 1076 io_channel_flush(ctx->fs->io); 1077 } else { 1078 if (ctx->flags & E2F_FLAG_RESTARTED) { 1079 /* 1080 * Whoops, we attempted to run the 1081 * journal twice. This should never 1082 * happen, unless the hardware or 1083 * device driver is being bogus. 1084 */ 1085 com_err(ctx->program_name, 0, 1086 _("unable to set superblock flags on %s\n"), ctx->device_name); 1087 fatal_error(ctx, 0); 1088 } 1089 retval = e2fsck_run_ext3_journal(ctx); 1090 if (retval) { 1091 com_err(ctx->program_name, retval, 1092 _("while recovering ext3 journal of %s"), 1093 ctx->device_name); 1094 fatal_error(ctx, 0); 1095 } 1096 ext2fs_close(ctx->fs); 1097 ctx->fs = 0; 1098 ctx->flags |= E2F_FLAG_RESTARTED; 1099 goto restart; 1100 } 1101 } 1102 1103 /* 1104 * Check for compatibility with the feature sets. We need to 1105 * be more stringent than ext2fs_open(). 1106 */ 1107 if ((sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) || 1108 (sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP)) { 1109 com_err(ctx->program_name, EXT2_ET_UNSUPP_FEATURE, 1110 "(%s)", ctx->device_name); 1111 goto get_newer; 1112 } 1113 if (sb->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) { 1114 com_err(ctx->program_name, EXT2_ET_RO_UNSUPP_FEATURE, 1115 "(%s)", ctx->device_name); 1116 goto get_newer; 1117 } 1118#ifdef ENABLE_COMPRESSION 1119 if (sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_COMPRESSION) 1120 com_err(ctx->program_name, 0, 1121 _("Warning: compression support is experimental.\n")); 1122#endif 1123#ifndef ENABLE_HTREE 1124 if (sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) { 1125 com_err(ctx->program_name, 0, 1126 _("E2fsck not compiled with HTREE support,\n\t" 1127 "but filesystem %s has HTREE directories.\n"), 1128 ctx->device_name); 1129 goto get_newer; 1130 } 1131#endif 1132 1133 /* 1134 * If the user specified a specific superblock, presumably the 1135 * master superblock has been trashed. So we mark the 1136 * superblock as dirty, so it can be written out. 1137 */ 1138 if (ctx->superblock && 1139 !(ctx->options & E2F_OPT_READONLY)) 1140 ext2fs_mark_super_dirty(fs); 1141 1142 ehandler_init(fs->io); 1143 1144 if (ctx->superblock) 1145 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0); 1146 ext2fs_mark_valid(fs); 1147 check_super_block(ctx); 1148 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 1149 fatal_error(ctx, 0); 1150 check_if_skip(ctx); 1151 if (bad_blocks_file) 1152 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks); 1153 else if (cflag) 1154 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */ 1155 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 1156 fatal_error(ctx, 0); 1157#ifdef ENABLE_SWAPFS 1158 if (normalize_swapfs) { 1159 if ((fs->flags & EXT2_FLAG_SWAP_BYTES) == 1160 ext2fs_native_flag()) { 1161 fprintf(stderr, _("%s: Filesystem byte order " 1162 "already normalized.\n"), ctx->device_name); 1163 fatal_error(ctx, 0); 1164 } 1165 } 1166 if (swapfs) { 1167 swap_filesys(ctx); 1168 if (ctx->flags & E2F_FLAG_SIGNAL_MASK) 1169 fatal_error(ctx, 0); 1170 } 1171#endif 1172 1173 /* 1174 * Mark the system as valid, 'til proven otherwise 1175 */ 1176 ext2fs_mark_valid(fs); 1177 1178 retval = ext2fs_read_bb_inode(fs, &fs->badblocks); 1179 if (retval) { 1180 com_err(ctx->program_name, retval, 1181 _("while reading bad blocks inode")); 1182 preenhalt(ctx); 1183 printf(_("This doesn't bode well," 1184 " but we'll try to go on...\n")); 1185 } 1186 1187 /* 1188 * Save the journal size in megabytes. 1189 * Try and use the journal size from the backup else let e2fsck 1190 * find the default journal size. 1191 */ 1192 if (sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS) 1193 journal_size = sb->s_jnl_blocks[16] >> 20; 1194 else 1195 journal_size = -1; 1196 1197 run_result = e2fsck_run(ctx); 1198 e2fsck_clear_progbar(ctx); 1199 1200 if (ctx->flags & E2F_FLAG_JOURNAL_INODE) { 1201 if (fix_problem(ctx, PR_6_RECREATE_JOURNAL, &pctx)) { 1202 if (journal_size < 1024) 1203 journal_size = ext2fs_default_journal_size(fs->super->s_blocks_count); 1204 if (journal_size < 0) { 1205 fs->super->s_feature_compat &= 1206 ~EXT3_FEATURE_COMPAT_HAS_JOURNAL; 1207 com_err(ctx->program_name, 0, 1208 _("Couldn't determine journal size")); 1209 goto no_journal; 1210 } 1211 printf(_("Creating journal (%d blocks): "), 1212 journal_size); 1213 fflush(stdout); 1214 retval = ext2fs_add_journal_inode(fs, 1215 journal_size, 0); 1216 if (retval) { 1217 com_err("Error ", retval, 1218 _("\n\twhile trying to create journal")); 1219 goto no_journal; 1220 } 1221 printf(_(" Done.\n")); 1222 printf(_("\n*** journal has been re-created - " 1223 "filesystem is now ext3 again ***\n")); 1224 } 1225 } 1226no_journal: 1227 1228 if (run_result == E2F_FLAG_RESTART) { 1229 printf(_("Restarting e2fsck from the beginning...\n")); 1230 retval = e2fsck_reset_context(ctx); 1231 if (retval) { 1232 com_err(ctx->program_name, retval, 1233 _("while resetting context")); 1234 fatal_error(ctx, 0); 1235 } 1236 ext2fs_close(fs); 1237 goto restart; 1238 } 1239 if (run_result & E2F_FLAG_CANCEL) { 1240 printf(_("%s: e2fsck canceled.\n"), ctx->device_name ? 1241 ctx->device_name : ctx->filesystem_name); 1242 exit_value |= FSCK_CANCELED; 1243 } 1244 if (run_result & E2F_FLAG_ABORT) 1245 fatal_error(ctx, _("aborted")); 1246 1247#ifdef MTRACE 1248 mtrace_print("Cleanup"); 1249#endif 1250 if (ext2fs_test_changed(fs)) { 1251 exit_value |= FSCK_NONDESTRUCT; 1252 if (!(ctx->options & E2F_OPT_PREEN)) 1253 printf(_("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"), 1254 ctx->device_name); 1255 if (ctx->mount_flags & EXT2_MF_ISROOT) { 1256 printf(_("%s: ***** REBOOT LINUX *****\n"), 1257 ctx->device_name); 1258 exit_value |= FSCK_REBOOT; 1259 } 1260 } 1261 if (!ext2fs_test_valid(fs) || 1262 ((exit_value & FSCK_CANCELED) && 1263 (sb->s_state & EXT2_ERROR_FS))) { 1264 printf(_("\n%s: ********** WARNING: Filesystem still has " 1265 "errors **********\n\n"), ctx->device_name); 1266 exit_value |= FSCK_UNCORRECTED; 1267 exit_value &= ~FSCK_NONDESTRUCT; 1268 } 1269 if (exit_value & FSCK_CANCELED) { 1270 int allow_cancellation; 1271 1272 profile_get_boolean(ctx->profile, "options", 1273 "allow_cancellation", 0, 0, 1274 &allow_cancellation); 1275 exit_value &= ~FSCK_NONDESTRUCT; 1276 if (allow_cancellation && ext2fs_test_valid(fs) && 1277 (sb->s_state & EXT2_VALID_FS) && 1278 !(sb->s_state & EXT2_ERROR_FS)) 1279 exit_value = 0; 1280 } else { 1281 show_stats(ctx); 1282 if (!(ctx->options & E2F_OPT_READONLY)) { 1283 if (ext2fs_test_valid(fs)) { 1284 if (!(sb->s_state & EXT2_VALID_FS)) 1285 exit_value |= FSCK_NONDESTRUCT; 1286 sb->s_state = EXT2_VALID_FS; 1287 } else 1288 sb->s_state &= ~EXT2_VALID_FS; 1289 sb->s_mnt_count = 0; 1290 sb->s_lastcheck = ctx->now; 1291 ext2fs_mark_super_dirty(fs); 1292 } 1293 } 1294 1295 e2fsck_write_bitmaps(ctx); 1296#ifdef RESOURCE_TRACK 1297 io_channel_flush(ctx->fs->io); 1298 if (ctx->options & E2F_OPT_TIME) 1299 print_resource_track(NULL, &ctx->global_rtrack, ctx->fs->io); 1300#endif 1301 ext2fs_close(fs); 1302 ctx->fs = NULL; 1303 free(ctx->filesystem_name); 1304 free(ctx->journal_name); 1305 1306 e2fsck_free_context(ctx); 1307 remove_error_table(&et_ext2_error_table); 1308 remove_error_table(&et_prof_error_table); 1309 return exit_value; 1310} 1311