e2fsck/unix.c

   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 #define _XOPEN_SOURCE 600 /* for inclusion of sa_handler in Solaris */
  13
  14 #include "config.h"
  15 #include <stdio.h>
  16 #ifdef HAVE_STDLIB_H
  17 #include <stdlib.h>
  18 #endif
  19 #include <string.h>
  20 #include <fcntl.h>
  21 #include <ctype.h>
  22 #include <time.h>
  23 #ifdef HAVE_SIGNAL_H
  24 #include <signal.h>
  25 #endif
  26 #ifdef HAVE_GETOPT_H
  27 #include <getopt.h>
  28 #else
  29 extern char *optarg;
  30 extern int optind;
  31 #endif
  32 #include <unistd.h>
  33 #ifdef HAVE_ERRNO_H
  34 #include <errno.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 #include <libgen.h>
  49
  50 #include "e2p/e2p.h"
  51 #include "et/com_err.h"
  52 #include "e2p/e2p.h"
  53 #include "uuid/uuid.h"
  54 #include "support/plausible.h"
  55 #include "support/devname.h"
  56 #include "e2fsck.h"
  57 #include "problem.h"
  58 #include "jfs_user.h"
  59 #include "../version.h"
  60
  61 /* Command line options */
  62 static int cflag;               /* check disk */
  63 static int show_version_only;
  64 static int verbose;
  65
  66 static int replace_bad_blocks;
  67 static int keep_bad_blocks;
  68 static char *bad_blocks_file;
  69
  70 e2fsck_t e2fsck_global_ctx;     /* Try your very best not to use this! */
  71
  72 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jbd-debug */
  73 int journal_enable_debug = -1;
  74 #endif
  75
  76 static void usage(e2fsck_t ctx)
  77 {
  78         fprintf(stderr,
  79                 _("Usage: %s [-pamnyrcdfktvDFV] [-b superblock] [-B blocksize]\n"
  80                 "\t\t[-l|-L bad_blocks_file] [-C fd] [-j external_journal]\n"
  81                 "\t\t[-E extended-options] [-z undo_file] device\n"),
  82                 ctx->program_name ? ctx->program_name : "e2fsck");
  83
  84         fprintf(stderr, "%s", _("\nEmergency help:\n"
  85                 " -p                   Automatic repair (no questions)\n"
  86 #ifdef HAVE_PTHREAD
  87                 " -m                   multiple threads to speedup fsck\n"
  88 #endif
  89                 " -n                   Make no changes to the filesystem\n"
  90                 " -y                   Assume \"yes\" to all questions\n"
  91                 " -c                   Check for bad blocks and add them to the badblock list\n"
  92                 " -f                   Force checking even if filesystem is marked clean\n"));
  93         fprintf(stderr, "%s", _(""
  94                 " -v                   Be verbose\n"
  95                 " -b superblock        Use alternative superblock\n"
  96                 " -B blocksize         Force blocksize when looking for superblock\n"
  97                 " -j external_journal  Set location of the external journal\n"
  98                 " -l bad_blocks_file   Add to badblocks list\n"
  99                 " -L bad_blocks_file   Set badblocks list\n"
 100                 " -z undo_file         Create an undo file\n"
 101                 ));
 102
 103         exit(FSCK_USAGE);
 104 }
 105
 106 static void show_stats(e2fsck_t ctx)
 107 {
 108         ext2_filsys fs = ctx->fs;
 109         ext2_ino_t inodes, inodes_used;
 110         blk64_t blocks, blocks_used;
 111         unsigned int dir_links;
 112         unsigned int num_files, num_links;
 113         __u32 *mask, m;
 114         int frag_percent_file = 0, frag_percent_dir = 0, frag_percent_total = 0;
 115         int i, j, printed = 0;
 116
 117         dir_links = 2 * ctx->fs_directory_count - 1;
 118         num_files = ctx->fs_total_count - dir_links;
 119         num_links = ctx->fs_links_count - dir_links;
 120         inodes = fs->super->s_inodes_count;
 121         inodes_used = (fs->super->s_inodes_count -
 122                        fs->super->s_free_inodes_count);
 123         blocks = ext2fs_blocks_count(fs->super);
 124         blocks_used = (ext2fs_blocks_count(fs->super) -
 125                        ext2fs_free_blocks_count(fs->super));
 126
 127         if (inodes_used > 0) {
 128                 frag_percent_file = (10000 * ctx->fs_fragmented) / inodes_used;
 129                 frag_percent_file = (frag_percent_file + 5) / 10;
 130
 131                 frag_percent_dir = (10000 * ctx->fs_fragmented_dir) / inodes_used;
 132                 frag_percent_dir = (frag_percent_dir + 5) / 10;
 133
 134                 frag_percent_total = ((10000 * (ctx->fs_fragmented +
 135                                                 ctx->fs_fragmented_dir))
 136                                       / inodes_used);
 137                 frag_percent_total = (frag_percent_total + 5) / 10;
 138         }
 139
 140         if (!verbose) {
 141                 log_out(ctx, _("%s: %u/%u files (%0d.%d%% non-contiguous), "
 142                                "%llu/%llu blocks\n"),
 143                         ctx->device_name, inodes_used, inodes,
 144                         frag_percent_total / 10, frag_percent_total % 10,
 145                         (unsigned long long) blocks_used,
 146                         (unsigned long long) blocks);
 147                 return;
 148         }
 149         profile_get_boolean(ctx->profile, "options", "report_features", 0, 0,
 150                             &i);
 151         if (verbose && i) {
 152                 log_out(ctx, "\nFilesystem features:");
 153                 mask = &ctx->fs->super->s_feature_compat;
 154                 for (i = 0; i < 3; i++, mask++) {
 155                         for (j = 0, m = 1; j < 32; j++, m <<= 1) {
 156                                 if (*mask & m) {
 157                                         log_out(ctx, " %s",
 158                                                 e2p_feature2string(i, m));
 159                                         printed++;
 160                                 }
 161                         }
 162                 }
 163                 if (printed == 0)
 164                         log_out(ctx, " (none)");
 165                 log_out(ctx, "\n");
 166         }
 167
 168         log_out(ctx, P_("\n%12u inode used (%2.2f%%, out of %u)\n",
 169                         "\n%12u inodes used (%2.2f%%, out of %u)\n",
 170                         inodes_used), inodes_used,
 171                 100.0 * inodes_used / inodes, inodes);
 172         log_out(ctx, P_("%12u non-contiguous file (%0d.%d%%)\n",
 173                         "%12u non-contiguous files (%0d.%d%%)\n",
 174                         ctx->fs_fragmented),
 175                 ctx->fs_fragmented, frag_percent_file / 10,
 176                 frag_percent_file % 10);
 177         log_out(ctx, P_("%12u non-contiguous directory (%0d.%d%%)\n",
 178                         "%12u non-contiguous directories (%0d.%d%%)\n",
 179                         ctx->fs_fragmented_dir),
 180                 ctx->fs_fragmented_dir, frag_percent_dir / 10,
 181                 frag_percent_dir % 10);
 182         log_out(ctx, _("             # of inodes with ind/dind/tind blocks: "
 183                        "%u/%u/%u\n"),
 184                 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
 185
 186         for (j=MAX_EXTENT_DEPTH_COUNT-1; j >=0; j--)
 187                 if (ctx->extent_depth_count[j])
 188                         break;
 189         if (++j) {
 190                 log_out(ctx, "%s", _("             Extent depth histogram: "));
 191                 for (i=0; i < j; i++) {
 192                         if (i)
 193                                 fputc('/', stdout);
 194                         log_out(ctx, "%u", ctx->extent_depth_count[i]);
 195                 }
 196                 log_out(ctx, "\n");
 197         }
 198
 199         log_out(ctx, P_("%12llu block used (%2.2f%%, out of %llu)\n",
 200                         "%12llu blocks used (%2.2f%%, out of %llu)\n",
 201                    blocks_used),
 202                 (unsigned long long) blocks_used, 100.0 * blocks_used / blocks,
 203                 (unsigned long long) blocks);
 204         log_out(ctx, P_("%12u bad block\n", "%12u bad blocks\n",
 205                         ctx->fs_badblocks_count), ctx->fs_badblocks_count);
 206         log_out(ctx, P_("%12u large file\n", "%12u large files\n",
 207                         ctx->large_files), ctx->large_files);
 208         log_out(ctx, P_("\n%12u regular file\n", "\n%12u regular files\n",
 209                         ctx->fs_regular_count), ctx->fs_regular_count);
 210         log_out(ctx, P_("%12u directory\n", "%12u directories\n",
 211                         ctx->fs_directory_count), ctx->fs_directory_count);
 212         log_out(ctx, P_("%12u character device file\n",
 213                         "%12u character device files\n", ctx->fs_chardev_count),
 214                 ctx->fs_chardev_count);
 215         log_out(ctx, P_("%12u block device file\n", "%12u block device files\n",
 216                         ctx->fs_blockdev_count), ctx->fs_blockdev_count);
 217         log_out(ctx, P_("%12u fifo\n", "%12u fifos\n", ctx->fs_fifo_count),
 218                 ctx->fs_fifo_count);
 219         log_out(ctx, P_("%12u link\n", "%12u links\n", num_links),
 220                 ctx->fs_links_count - dir_links);
 221         log_out(ctx, P_("%12u symbolic link", "%12u symbolic links",
 222                         ctx->fs_symlinks_count), ctx->fs_symlinks_count);
 223         log_out(ctx, P_(" (%u fast symbolic link)\n",
 224                         " (%u fast symbolic links)\n",
 225                         ctx->fs_fast_symlinks_count),
 226                 ctx->fs_fast_symlinks_count);
 227         log_out(ctx, P_("%12u socket\n", "%12u sockets\n",
 228                         ctx->fs_sockets_count),
 229                 ctx->fs_sockets_count);
 230         log_out(ctx, "------------\n");
 231         log_out(ctx, P_("%12u file\n", "%12u files\n", num_files),
 232                 num_files);
 233 }
 234
 235 static void check_mount(e2fsck_t ctx)
 236 {
 237         errcode_t       retval;
 238         int             cont;
 239
 240         retval = ext2fs_check_if_mounted(ctx->filesystem_name,
 241                                          &ctx->mount_flags);
 242         if (retval) {
 243                 com_err("ext2fs_check_if_mount", retval,
 244                         _("while determining whether %s is mounted."),
 245                         ctx->filesystem_name);
 246                 return;
 247         }
 248
 249         /*
 250          * If the filesystem isn't mounted, or it's the root
 251          * filesystem and it's mounted read-only, and we're not doing
 252          * a read/write check, then everything's fine.
 253          */
 254         if ((!(ctx->mount_flags & (EXT2_MF_MOUNTED | EXT2_MF_BUSY))) ||
 255             ((ctx->mount_flags & EXT2_MF_ISROOT) &&
 256              (ctx->mount_flags & EXT2_MF_READONLY) &&
 257              !(ctx->options & E2F_OPT_WRITECHECK)))
 258                 return;
 259
 260         if (((ctx->options & E2F_OPT_READONLY) ||
 261              ((ctx->options & E2F_OPT_FORCE) &&
 262               (ctx->mount_flags & EXT2_MF_READONLY))) &&
 263             !(ctx->options & E2F_OPT_WRITECHECK)) {
 264                 if (ctx->mount_flags & EXT2_MF_MOUNTED)
 265                         log_out(ctx, _("Warning!  %s is mounted.\n"),
 266                                         ctx->filesystem_name);
 267                 else
 268                         log_out(ctx, _("Warning!  %s is in use.\n"),
 269                                         ctx->filesystem_name);
 270                 return;
 271         }
 272
 273         if (ctx->mount_flags & EXT2_MF_MOUNTED)
 274                 log_out(ctx, _("%s is mounted.\n"), ctx->filesystem_name);
 275         else
 276                 log_out(ctx, _("%s is in use.\n"), ctx->filesystem_name);
 277         if (!ctx->interactive || ctx->mount_flags & EXT2_MF_BUSY)
 278                 fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
 279         puts("\007\007\007\007");
 280         log_out(ctx, "%s", _("\n\nWARNING!!!  "
 281                        "The filesystem is mounted.   "
 282                        "If you continue you ***WILL***\n"
 283                        "cause ***SEVERE*** filesystem damage.\n\n"));
 284         puts("\007\007\007");
 285         cont = ask_yn(ctx, _("Do you really want to continue"), 0);
 286         if (!cont) {
 287                 printf("%s", _("check aborted.\n"));
 288                 exit (0);
 289         }
 290         return;
 291 }
 292
 293 static int is_on_batt(void)
 294 {
 295         FILE    *f;
 296         DIR     *d;
 297         char    tmp[80], tmp2[80], fname[NAME_MAX+30];
 298         unsigned int    acflag;
 299         struct dirent*  de;
 300
 301         f = fopen("/sys/class/power_supply/AC/online", "r");
 302         if (f) {
 303                 if (fscanf(f, "%u\n", &acflag) == 1) {
 304                         fclose(f);
 305                         return (!acflag);
 306                 }
 307                 fclose(f);
 308         }
 309         f = fopen("/proc/apm", "r");
 310         if (f) {
 311                 if (fscanf(f, "%79s %79s %79s %x", tmp, tmp, tmp, &acflag) != 4)
 312                         acflag = 1;
 313                 fclose(f);
 314                 return (acflag != 1);
 315         }
 316         d = opendir("/proc/acpi/ac_adapter");
 317         if (d) {
 318                 while ((de=readdir(d)) != NULL) {
 319                         if (!strncmp(".", de->d_name, 1))
 320                                 continue;
 321                         snprintf(fname, sizeof(fname),
 322                                  "/proc/acpi/ac_adapter/%s/state",
 323                                  de->d_name);
 324                         f = fopen(fname, "r");
 325                         if (!f)
 326                                 continue;
 327                         if (fscanf(f, "%79s %79s", tmp2, tmp) != 2)
 328                                 tmp[0] = 0;
 329                         fclose(f);
 330                         if (strncmp(tmp, "off-line", 8) == 0) {
 331                                 closedir(d);
 332                                 return 1;
 333                         }
 334                 }
 335                 closedir(d);
 336         }
 337         return 0;
 338 }
 339
 340 /*
 341  * This routine checks to see if a filesystem can be skipped; if so,
 342  * it will exit with E2FSCK_OK.  Under some conditions it will print a
 343  * message explaining why a check is being forced.
 344  */
 345 static void check_if_skip(e2fsck_t ctx)
 346 {
 347         ext2_filsys fs = ctx->fs;
 348         struct problem_context pctx;
 349         const char *reason = NULL;
 350         unsigned int reason_arg = 0;
 351         long next_check;
 352         int batt = is_on_batt();
 353         int defer_check_on_battery;
 354         int broken_system_clock;
 355         time_t lastcheck;
 356
 357         if (ctx->flags & E2F_FLAG_PROBLEMS_FIXED)
 358                 return;
 359
 360         profile_get_boolean(ctx->profile, "options", "broken_system_clock",
 361                             0, 0, &broken_system_clock);
 362         if (ctx->flags & E2F_FLAG_TIME_INSANE)
 363                 broken_system_clock = 1;
 364         profile_get_boolean(ctx->profile, "options",
 365                             "defer_check_on_battery", 0, 1,
 366                             &defer_check_on_battery);
 367         if (!defer_check_on_battery)
 368                 batt = 0;
 369
 370         if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file || cflag)
 371                 return;
 372
 373         if (ctx->options & E2F_OPT_JOURNAL_ONLY)
 374                 goto skip;
 375
 376         lastcheck = fs->super->s_lastcheck;
 377         if (lastcheck > ctx->now)
 378                 lastcheck -= ctx->time_fudge;
 379         if ((fs->super->s_state & EXT2_ERROR_FS) ||
 380             !ext2fs_test_valid(fs))
 381                 reason = _(" contains a file system with errors");
 382         else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
 383                 reason = _(" was not cleanly unmounted");
 384         else if (check_backup_super_block(ctx))
 385                 reason = _(" primary superblock features different from backup");
 386         else if ((fs->super->s_max_mnt_count > 0) &&
 387                  (fs->super->s_mnt_count >=
 388                   (unsigned) fs->super->s_max_mnt_count)) {
 389                 reason = _(" has been mounted %u times without being checked");
 390                 reason_arg = fs->super->s_mnt_count;
 391                 if (batt && (fs->super->s_mnt_count <
 392                              (unsigned) fs->super->s_max_mnt_count*2))
 393                         reason = 0;
 394         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 395                    (ctx->now < lastcheck)) {
 396                 reason = _(" has filesystem last checked time in the future");
 397                 if (batt)
 398                         reason = 0;
 399         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 400                    ((ctx->now - lastcheck) >=
 401                     ((time_t) fs->super->s_checkinterval))) {
 402                 reason = _(" has gone %u days without being checked");
 403                 reason_arg = (ctx->now - fs->super->s_lastcheck)/(3600*24);
 404                 if (batt && ((ctx->now - fs->super->s_lastcheck) <
 405                              fs->super->s_checkinterval*2))
 406                         reason = 0;
 407         } else if (broken_system_clock && fs->super->s_checkinterval) {
 408                 log_out(ctx, "%s: ", ctx->device_name);
 409                 log_out(ctx, "%s",
 410                         _("ignoring check interval, broken_system_clock set\n"));
 411         }
 412
 413         if (reason) {
 414                 log_out(ctx, "%s", ctx->device_name);
 415                 log_out(ctx, reason, reason_arg);
 416                 log_out(ctx, "%s", _(", check forced.\n"));
 417                 return;
 418         }
 419
 420         /*
 421          * Update the global counts from the block group counts.  This
 422          * is needed since modern kernels don't update the global
 423          * counts so as to avoid locking the entire file system.  So
 424          * if the filesystem is not unmounted cleanly, the global
 425          * counts may not be accurate.  Update them here if we can,
 426          * for the benefit of users who might examine the file system
 427          * using dumpe2fs.  (This is for cosmetic reasons only.)
 428          */
 429         clear_problem_context(&pctx);
 430         pctx.ino = fs->super->s_free_inodes_count;
 431         pctx.ino2 = ctx->free_inodes;
 432         if ((pctx.ino != pctx.ino2) &&
 433             !(ctx->options & E2F_OPT_READONLY) &&
 434             fix_problem(ctx, PR_0_FREE_INODE_COUNT, &pctx)) {
 435                 fs->super->s_free_inodes_count = ctx->free_inodes;
 436                 ext2fs_mark_super_dirty(fs);
 437         }
 438         clear_problem_context(&pctx);
 439         pctx.blk = ext2fs_free_blocks_count(fs->super);
 440         pctx.blk2 = ctx->free_blocks;
 441         if ((pctx.blk != pctx.blk2) &&
 442             !(ctx->options & E2F_OPT_READONLY) &&
 443             fix_problem(ctx, PR_0_FREE_BLOCK_COUNT, &pctx)) {
 444                 ext2fs_free_blocks_count_set(fs->super, ctx->free_blocks);
 445                 ext2fs_mark_super_dirty(fs);
 446         }
 447
 448         /* Print the summary message when we're skipping a full check */
 449         log_out(ctx, _("%s: clean, %u/%u files, %llu/%llu blocks"),
 450                 ctx->device_name,
 451                 fs->super->s_inodes_count - fs->super->s_free_inodes_count,
 452                 fs->super->s_inodes_count,
 453                 (unsigned long long) ext2fs_blocks_count(fs->super) -
 454                 ext2fs_free_blocks_count(fs->super),
 455                 (unsigned long long) ext2fs_blocks_count(fs->super));
 456         next_check = 100000;
 457         if (fs->super->s_max_mnt_count > 0) {
 458                 next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count;
 459                 if (next_check <= 0)
 460                         next_check = 1;
 461         }
 462         if (!broken_system_clock && fs->super->s_checkinterval &&
 463             ((ctx->now - fs->super->s_lastcheck) >= fs->super->s_checkinterval))
 464                 next_check = 1;
 465         if (next_check <= 5) {
 466                 if (next_check == 1) {
 467                         if (batt)
 468                                 log_out(ctx, "%s",
 469                                         _(" (check deferred; on battery)"));
 470                         else
 471                                 log_out(ctx, "%s",
 472                                         _(" (check after next mount)"));
 473                 } else
 474                         log_out(ctx, _(" (check in %ld mounts)"),
 475                                 next_check);
 476         }
 477         log_out(ctx, "\n");
 478 skip:
 479         ext2fs_close_free(&ctx->fs);
 480         e2fsck_free_context(ctx);
 481         exit(FSCK_OK);
 482 }
 483
 484 /*
 485  * For completion notice
 486  */
 487 struct percent_tbl {
 488         int     max_pass;
 489         int     table[32];
 490 };
 491 static struct percent_tbl e2fsck_tbl = {
 492         5, { 0, 70, 90, 92,  95, 100 }
 493 };
 494 static char bar[128], spaces[128];
 495
 496 static float calc_percent(struct percent_tbl *tbl, int pass, int curr,
 497                           int max)
 498 {
 499         float   percent;
 500
 501         if (pass <= 0)
 502                 return 0.0;
 503         if (pass > tbl->max_pass || max == 0)
 504                 return 100.0;
 505         percent = ((float) curr) / ((float) max);
 506         return ((percent * (tbl->table[pass] - tbl->table[pass-1]))
 507                 + tbl->table[pass-1]);
 508 }
 509
 510 void e2fsck_clear_progbar(e2fsck_t ctx)
 511 {
 512         if (!(ctx->flags & E2F_FLAG_PROG_BAR))
 513                 return;
 514
 515         printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80),
 516                ctx->stop_meta);
 517         fflush(stdout);
 518         ctx->flags &= ~E2F_FLAG_PROG_BAR;
 519 }
 520
 521 int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent,
 522                            unsigned int dpynum)
 523 {
 524         static const char spinner[] = "\\|/-";
 525         int     i;
 526         unsigned int    tick;
 527         struct timeval  tv;
 528         int dpywidth;
 529         int fixed_percent;
 530
 531         if (ctx->flags & E2F_FLAG_PROG_SUPPRESS)
 532                 return 0;
 533
 534         /*
 535          * Calculate the new progress position.  If the
 536          * percentage hasn't changed, then we skip out right
 537          * away.
 538          */
 539         fixed_percent = (int) ((10 * percent) + 0.5);
 540         if (ctx->progress_last_percent == fixed_percent)
 541                 return 0;
 542         ctx->progress_last_percent = fixed_percent;
 543
 544         /*
 545          * If we've already updated the spinner once within
 546          * the last 1/8th of a second, no point doing it
 547          * again.
 548          */
 549         gettimeofday(&tv, NULL);
 550         tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8));
 551         if ((tick == ctx->progress_last_time) &&
 552             (fixed_percent != 0) && (fixed_percent != 1000))
 553                 return 0;
 554         ctx->progress_last_time = tick;
 555
 556         /*
 557          * Advance the spinner, and note that the progress bar
 558          * will be on the screen
 559          */
 560         ctx->progress_pos = (ctx->progress_pos+1) & 3;
 561         ctx->flags |= E2F_FLAG_PROG_BAR;
 562
 563         dpywidth = 66 - strlen(label);
 564         dpywidth = 8 * (dpywidth / 8);
 565         if (dpynum)
 566                 dpywidth -= 8;
 567
 568         i = ((percent * dpywidth) + 50) / 100;
 569         printf("%s%s: |%s%s", ctx->start_meta, label,
 570                bar + (sizeof(bar) - (i+1)),
 571                spaces + (sizeof(spaces) - (dpywidth - i + 1)));
 572         if (fixed_percent == 1000)
 573                 fputc('|', stdout);
 574         else
 575                 fputc(spinner[ctx->progress_pos & 3], stdout);
 576         printf(" %4.1f%%  ", percent);
 577         if (dpynum)
 578                 printf("%u\r", dpynum);
 579         else
 580                 fputs(" \r", stdout);
 581         fputs(ctx->stop_meta, stdout);
 582
 583         if (fixed_percent == 1000)
 584                 e2fsck_clear_progbar(ctx);
 585         fflush(stdout);
 586
 587         return 0;
 588 }
 589
 590 static int e2fsck_update_progress(e2fsck_t ctx, int pass,
 591                                   unsigned long cur, unsigned long max)
 592 {
 593         char buf[1024];
 594         float percent;
 595
 596         if (pass == 0)
 597                 return 0;
 598
 599         if (ctx->progress_fd) {
 600                 snprintf(buf, sizeof(buf), "%d %lu %lu %s\n",
 601                          pass, cur, max, ctx->device_name);
 602                 write_all(ctx->progress_fd, buf, strlen(buf));
 603         } else {
 604                 percent = calc_percent(&e2fsck_tbl, pass, cur, max);
 605                 e2fsck_simple_progress(ctx, ctx->device_name,
 606                                        percent, 0);
 607         }
 608         return 0;
 609 }
 610
 611 #define PATH_SET "PATH=/sbin"
 612
 613 /*
 614  * Make sure 0,1,2 file descriptors are open, so that we don't open
 615  * the filesystem using the same file descriptor as stdout or stderr.
 616  */
 617 static void reserve_stdio_fds(void)
 618 {
 619         int     fd = 0;
 620
 621         while (fd <= 2) {
 622                 fd = open("/dev/null", O_RDWR);
 623                 if (fd < 0) {
 624                         fprintf(stderr, _("ERROR: Couldn't open "
 625                                 "/dev/null (%s)\n"),
 626                                 strerror(errno));
 627                         return;
 628                 }
 629         }
 630         (void) close(fd);
 631 }
 632
 633 #ifdef HAVE_SIGNAL_H
 634 static void signal_progress_on(int sig EXT2FS_ATTR((unused)))
 635 {
 636         e2fsck_t ctx = e2fsck_global_ctx;
 637
 638         if (!ctx)
 639                 return;
 640
 641         ctx->progress = e2fsck_update_progress;
 642 }
 643
 644 static void signal_progress_off(int sig EXT2FS_ATTR((unused)))
 645 {
 646         e2fsck_t ctx = e2fsck_global_ctx;
 647
 648         if (!ctx)
 649                 return;
 650
 651         e2fsck_clear_progbar(ctx);
 652         ctx->progress = 0;
 653 }
 654
 655 static void signal_cancel(int sig EXT2FS_ATTR((unused)))
 656 {
 657         e2fsck_t ctx = e2fsck_global_ctx;
 658
 659         if (!ctx)
 660                 exit(FSCK_CANCELED);
 661
 662         ctx->flags |= E2F_FLAG_CANCEL;
 663 }
 664 #endif
 665
 666 static void parse_extended_opts(e2fsck_t ctx, const char *opts)
 667 {
 668         char    *buf, *token, *next, *p, *arg;
 669         int     ea_ver;
 670         int     extended_usage = 0;
 671         unsigned long long reada_kb;
 672
 673         buf = string_copy(ctx, opts, 0);
 674         for (token = buf; token && *token; token = next) {
 675                 p = strchr(token, ',');
 676                 next = 0;
 677                 if (p) {
 678                         *p = 0;
 679                         next = p+1;
 680                 }
 681                 arg = strchr(token, '=');
 682                 if (arg) {
 683                         *arg = 0;
 684                         arg++;
 685                 }
 686                 if (strcmp(token, "ea_ver") == 0) {
 687                         if (!arg) {
 688                                 extended_usage++;
 689                                 continue;
 690                         }
 691                         ea_ver = strtoul(arg, &p, 0);
 692                         if (*p ||
 693                             ((ea_ver != 1) && (ea_ver != 2))) {
 694                                 fprintf(stderr, "%s",
 695                                         _("Invalid EA version.\n"));
 696                                 extended_usage++;
 697                                 continue;
 698                         }
 699                         ctx->ext_attr_ver = ea_ver;
 700                 } else if (strcmp(token, "readahead_kb") == 0) {
 701                         if (!arg) {
 702                                 extended_usage++;
 703                                 continue;
 704                         }
 705                         reada_kb = strtoull(arg, &p, 0);
 706                         if (*p) {
 707                                 fprintf(stderr, "%s",
 708                                         _("Invalid readahead buffer size.\n"));
 709                                 extended_usage++;
 710                                 continue;
 711                         }
 712                         ctx->readahead_kb = reada_kb;
 713                 } else if (strcmp(token, "fragcheck") == 0) {
 714                         ctx->options |= E2F_OPT_FRAGCHECK;
 715                         continue;
 716                 } else if (strcmp(token, "journal_only") == 0) {
 717                         if (arg) {
 718                                 extended_usage++;
 719                                 continue;
 720                         }
 721                         ctx->options |= E2F_OPT_JOURNAL_ONLY;
 722                 } else if (strcmp(token, "discard") == 0) {
 723                         ctx->options |= E2F_OPT_DISCARD;
 724                         continue;
 725                 } else if (strcmp(token, "nodiscard") == 0) {
 726                         ctx->options &= ~E2F_OPT_DISCARD;
 727                         continue;
 728                 } else if (strcmp(token, "optimize_extents") == 0) {
 729                         ctx->options &= ~E2F_OPT_NOOPT_EXTENTS;
 730                         continue;
 731                 } else if (strcmp(token, "no_optimize_extents") == 0) {
 732                         ctx->options |= E2F_OPT_NOOPT_EXTENTS;
 733                         continue;
 734                 } else if (strcmp(token, "inode_count_fullmap") == 0) {
 735                         ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
 736                         continue;
 737                 } else if (strcmp(token, "no_inode_count_fullmap") == 0) {
 738                         ctx->options &= ~E2F_OPT_ICOUNT_FULLMAP;
 739                         continue;
 740                 } else if (strcmp(token, "log_filename") == 0) {
 741                         if (!arg)
 742                                 extended_usage++;
 743                         else
 744                                 ctx->log_fn = string_copy(ctx, arg, 0);
 745                         continue;
 746                 } else if (strcmp(token, "problem_log") == 0) {
 747                         if (!arg)
 748                                 extended_usage++;
 749                         else
 750                                 ctx->problem_log_fn = string_copy(ctx, arg, 0);
 751                         continue;
 752                 } else if (strcmp(token, "bmap2extent") == 0) {
 753                         ctx->options |= E2F_OPT_CONVERT_BMAP;
 754                         continue;
 755                 } else if (strcmp(token, "fixes_only") == 0) {
 756                         ctx->options |= E2F_OPT_FIXES_ONLY;
 757                         continue;
 758                 } else if (strcmp(token, "unshare_blocks") == 0) {
 759                         ctx->options |= E2F_OPT_UNSHARE_BLOCKS;
 760                         ctx->options |= E2F_OPT_FORCE;
 761                         continue;
 762                 } else if (strcmp(token, "check_encoding") == 0) {
 763                         ctx->options |= E2F_OPT_CHECK_ENCODING;
 764                         continue;
 765 #ifdef CONFIG_DEVELOPER_FEATURES
 766                 } else if (strcmp(token, "clear_all_uninit_bits") == 0) {
 767                         ctx->options |= E2F_OPT_CLEAR_UNINIT;
 768                         continue;
 769 #endif
 770                 } else {
 771                         fprintf(stderr, _("Unknown extended option: %s\n"),
 772                                 token);
 773                         extended_usage++;
 774                 }
 775         }
 776         free(buf);
 777
 778         if (extended_usage) {
 779                 fputs(_("\nExtended options are separated by commas, "
 780                        "and may take an argument which\n"
 781                        "is set off by an equals ('=') sign.  "
 782                        "Valid extended options are:\n\n"), stderr);
 783                 fputs(_("\tea_ver=<ea_version (1 or 2)>\n"), stderr);
 784                 fputs("\tfragcheck\n", stderr);
 785                 fputs("\tjournal_only\n", stderr);
 786                 fputs("\tdiscard\n", stderr);
 787                 fputs("\tnodiscard\n", stderr);
 788                 fputs("\toptimize_extents\n", stderr);
 789                 fputs("\tno_optimize_extents\n", stderr);
 790                 fputs("\tinode_count_fullmap\n", stderr);
 791                 fputs("\tno_inode_count_fullmap\n", stderr);
 792                 fputs(_("\treadahead_kb=<buffer size>\n"), stderr);
 793                 fputs("\tbmap2extent\n", stderr);
 794                 fputs("\tunshare_blocks\n", stderr);
 795                 fputs("\tfixes_only\n", stderr);
 796                 fputs("\tcheck_encoding\n", stderr);
 797                 fputc('\n', stderr);
 798                 exit(1);
 799         }
 800 }
 801
 802 static void syntax_err_report(const char *filename, long err, int line_num)
 803 {
 804         fprintf(stderr,
 805                 _("Syntax error in e2fsck config file (%s, line #%d)\n\t%s\n"),
 806                 filename, line_num, error_message(err));
 807         exit(FSCK_ERROR);
 808 }
 809
 810 static const char *config_fn[] = { ROOT_SYSCONFDIR "/e2fsck.conf", 0 };
 811
 812 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 813 {
 814         int             flush = 0;
 815         int             c, fd;
 816 #ifdef MTRACE
 817         extern void     *mallwatch;
 818 #endif
 819         e2fsck_t        ctx;
 820         errcode_t       retval;
 821 #ifdef HAVE_SIGNAL_H
 822         struct sigaction        sa;
 823 #endif
 824         char            *cp;
 825         int             res;            /* result of sscanf */
 826 #ifdef CONFIG_JBD_DEBUG
 827         char            *jbd_debug;
 828 #endif
 829 #ifdef HAVE_PTHREAD
 830         char            *pm;
 831         unsigned long   thread_num;
 832 #endif
 833         unsigned long long phys_mem_kb, blk;
 834
 835         retval = e2fsck_allocate_context(&ctx);
 836         if (retval)
 837                 return retval;
 838
 839         *ret_ctx = ctx;
 840         e2fsck_global_ctx = ctx;
 841
 842         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
 843         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
 844         if (getenv("E2FSCK_FORCE_INTERACTIVE") || (isatty(0) && isatty(1))) {
 845                 ctx->interactive = 1;
 846         } else {
 847                 ctx->start_meta[0] = '\001';
 848                 ctx->stop_meta[0] = '\002';
 849         }
 850         memset(bar, '=', sizeof(bar)-1);
 851         memset(spaces, ' ', sizeof(spaces)-1);
 852         add_error_table(&et_ext2_error_table);
 853         add_error_table(&et_prof_error_table);
 854         blkid_get_cache(&ctx->blkid, NULL);
 855
 856         if (argc && *argv)
 857                 ctx->program_name = *argv;
 858         else
 859                 usage(NULL);
 860
 861         cp = getenv("E2FSCK_CONFIG");
 862         if (cp != NULL)
 863                 config_fn[0] = cp;
 864         profile_set_syntax_err_cb(syntax_err_report);
 865         profile_init(config_fn, &ctx->profile);
 866
 867         phys_mem_kb = get_memory_size() / 1024;
 868         ctx->readahead_kb = ~0ULL;
 869
 870 #ifdef HAVE_PTHREAD
 871         while ((c = getopt(argc, argv, "pam:nyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDkz:")) != EOF)
 872 #else
 873         while ((c = getopt(argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDkz:")) != EOF)
 874 #endif
 875                 switch (c) {
 876                 case 'C':
 877                         ctx->progress = e2fsck_update_progress;
 878                         res = sscanf(optarg, "%d", &ctx->progress_fd);
 879                         if (res != 1)
 880                                 goto sscanf_err;
 881
 882                         if (ctx->progress_fd < 0) {
 883                                 ctx->progress = 0;
 884                                 ctx->progress_fd = ctx->progress_fd * -1;
 885                         }
 886                         if (!ctx->progress_fd)
 887                                 break;
 888                         /* Validate the file descriptor to avoid disasters */
 889                         fd = dup(ctx->progress_fd);
 890                         if (fd < 0) {
 891                                 fprintf(stderr,
 892                                 _("Error validating file descriptor %d: %s\n"),
 893                                         ctx->progress_fd,
 894                                         error_message(errno));
 895                                 fatal_error(ctx,
 896                         _("Invalid completion information file descriptor"));
 897                         } else
 898                                 close(fd);
 899                         break;
 900                 case 'D':
 901                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 902                         break;
 903                 case 'E':
 904                         parse_extended_opts(ctx, optarg);
 905                         break;
 906                 case 'p':
 907                 case 'a':
 908                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
 909                         conflict_opt:
 910                                 fatal_error(ctx,
 911         _("Only one of the options -p/-a, -n or -y may be specified."));
 912                         }
 913                         ctx->options |= E2F_OPT_PREEN;
 914                         break;
 915 #ifdef HAVE_PTHREAD
 916                 case 'm':
 917                         thread_num = strtoul(optarg, &pm, 0);
 918                         if (*pm)
 919                                 fatal_error(ctx,
 920                                         _("Invalid multiple thread num.\n"));
 921                         if (thread_num > E2FSCK_MAX_THREADS) {
 922                                 fprintf(stderr,
 923                                         _("threads %lu too large (max %u)\n"),
 924                                         thread_num, E2FSCK_MAX_THREADS);
 925                                 fatal_error(ctx, 0);
 926                         }
 927                         ctx->options |= E2F_OPT_MULTITHREAD;
 928                         ctx->pfs_num_threads = thread_num;
 929                         break;
 930 #endif
 931                 case 'n':
 932                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
 933                                 goto conflict_opt;
 934                         ctx->options |= E2F_OPT_NO;
 935                         break;
 936                 case 'y':
 937                         if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
 938                                 goto conflict_opt;
 939                         ctx->options |= E2F_OPT_YES;
 940                         break;
 941                 case 't':
 942 #ifdef RESOURCE_TRACK
 943                         if (ctx->options & E2F_OPT_TIME)
 944                                 ctx->options |= E2F_OPT_TIME2;
 945                         else
 946                                 ctx->options |= E2F_OPT_TIME;
 947 #else
 948                         fprintf(stderr, _("The -t option is not "
 949                                 "supported on this version of e2fsck.\n"));
 950 #endif
 951                         break;
 952                 case 'c':
 953                         if (cflag++)
 954                                 ctx->options |= E2F_OPT_WRITECHECK;
 955                         ctx->options |= E2F_OPT_CHECKBLOCKS;
 956                         break;
 957                 case 'r':
 958                         /* What we do by default, anyway! */
 959                         break;
 960                 case 'b':
 961                         res = sscanf(optarg, "%llu", &blk);
 962                         ctx->use_superblock = blk;
 963                         if (res != 1)
 964                                 goto sscanf_err;
 965                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
 966                         break;
 967                 case 'B':
 968                         ctx->blocksize = atoi(optarg);
 969                         break;
 970                 case 'I':
 971                         res = sscanf(optarg, "%d", &ctx->inode_buffer_blocks);
 972                         if (res != 1)
 973                                 goto sscanf_err;
 974                         break;
 975                 case 'j':
 976                         ctx->journal_name = get_devname(ctx->blkid,
 977                                                         optarg, NULL);
 978                         if (!ctx->journal_name) {
 979                                 com_err(ctx->program_name, 0,
 980                                         _("Unable to resolve '%s'"),
 981                                         optarg);
 982                                 fatal_error(ctx, 0);
 983                         }
 984                         break;
 985                 case 'P':
 986                         res = sscanf(optarg, "%d", &ctx->process_inode_size);
 987                         if (res != 1)
 988                                 goto sscanf_err;
 989                         break;
 990                 case 'L':
 991                         replace_bad_blocks++;
 992                         /* fall through */
 993                 case 'l':
 994                         if (bad_blocks_file)
 995                                 free(bad_blocks_file);
 996                         bad_blocks_file = string_copy(ctx, optarg, 0);
 997                         break;
 998                 case 'd':
 999                         ctx->options |= E2F_OPT_DEBUG;
1000                         break;
1001                 case 'f':
1002                         ctx->options |= E2F_OPT_FORCE;
1003                         break;
1004                 case 'F':
1005                         flush = 1;
1006                         break;
1007                 case 'v':
1008                         verbose = 1;
1009                         break;
1010                 case 'V':
1011                         show_version_only = 1;
1012                         break;
1013 #ifdef MTRACE
1014                 case 'M':
1015                         mallwatch = (void *) strtol(optarg, NULL, 0);
1016                         break;
1017 #endif
1018                 case 'N':
1019                         ctx->device_name = string_copy(ctx, optarg, 0);
1020                         break;
1021                 case 'k':
1022                         keep_bad_blocks++;
1023                         break;
1024                 case 'z':
1025                         ctx->undo_file = optarg;
1026                         break;
1027                 default:
1028                         usage(ctx);
1029                 }
1030         if (show_version_only)
1031                 return 0;
1032         if (optind != argc - 1)
1033                 usage(ctx);
1034         if ((ctx->options & E2F_OPT_NO) &&
1035             (ctx->options & E2F_OPT_COMPRESS_DIRS)) {
1036                 com_err(ctx->program_name, 0, "%s",
1037                         _("The -n and -D options are incompatible."));
1038                 fatal_error(ctx, 0);
1039         }
1040         if ((ctx->options & E2F_OPT_NO) && cflag) {
1041                 com_err(ctx->program_name, 0, "%s",
1042                         _("The -n and -c options are incompatible."));
1043                 fatal_error(ctx, 0);
1044         }
1045         if ((ctx->options & E2F_OPT_NO) && bad_blocks_file) {
1046                 com_err(ctx->program_name, 0, "%s",
1047                         _("The -n and -l/-L options are incompatible."));
1048                 fatal_error(ctx, 0);
1049         }
1050 #ifdef HAVE_PTHREAD
1051         if (ctx->options & E2F_OPT_MULTITHREAD) {
1052                 if ((ctx->options & (E2F_OPT_YES|E2F_OPT_NO|E2F_OPT_PREEN)) == 0) {
1053                         com_err(ctx->program_name, 0, "%s",
1054                                 _("The -m option should be used together with one of -p/-y/-n options."));
1055                         fatal_error(ctx, 0);
1056                 }
1057         }
1058 #endif
1059         if (ctx->options & E2F_OPT_NO)
1060                 ctx->options |= E2F_OPT_READONLY;
1061
1062         ctx->io_options = strchr(argv[optind], '?');
1063         if (ctx->io_options)
1064                 *ctx->io_options++ = 0;
1065         ctx->filesystem_name = get_devname(ctx->blkid, argv[optind], 0);
1066         if (!ctx->filesystem_name) {
1067                 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
1068                         argv[optind]);
1069                 fatal_error(ctx, 0);
1070         }
1071
1072         /* Complain about mutually exclusive rebuilding activities */
1073         if (getenv("E2FSCK_FIXES_ONLY"))
1074                 ctx->options |= E2F_OPT_FIXES_ONLY;
1075         if ((ctx->options & E2F_OPT_COMPRESS_DIRS) &&
1076             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1077                 com_err(ctx->program_name, 0, "%s",
1078                         _("The -D and -E fixes_only options are incompatible."));
1079                 fatal_error(ctx, 0);
1080         }
1081         if ((ctx->options & E2F_OPT_CONVERT_BMAP) &&
1082             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1083                 com_err(ctx->program_name, 0, "%s",
1084                         _("The -E bmap2extent and fixes_only options are incompatible."));
1085                 fatal_error(ctx, 0);
1086         }
1087
1088         profile_get_boolean(ctx->profile, "options", "report_time", 0, 0,
1089                             &c);
1090         if (c)
1091                 ctx->options |= E2F_OPT_TIME | E2F_OPT_TIME2;
1092         profile_get_boolean(ctx->profile, "options", "report_verbose", 0, 0,
1093                             &c);
1094         if (c)
1095                 verbose = 1;
1096
1097         profile_get_boolean(ctx->profile, "options", "no_optimize_extents",
1098                             0, 0, &c);
1099         if (c)
1100                 ctx->options |= E2F_OPT_NOOPT_EXTENTS;
1101
1102         profile_get_boolean(ctx->profile, "options", "inode_count_fullmap",
1103                             0, 0, &c);
1104         if (c)
1105                 ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
1106
1107         if (ctx->readahead_kb == ~0ULL) {
1108                 profile_get_integer(ctx->profile, "options",
1109                                     "readahead_mem_pct", 0, -1, &c);
1110                 if (c >= 0 && c <= 100)
1111                         ctx->readahead_kb = phys_mem_kb * c / 100;
1112                 profile_get_integer(ctx->profile, "options",
1113                                     "readahead_kb", 0, -1, &c);
1114                 if (c >= 0)
1115                         ctx->readahead_kb = c;
1116                 if (ctx->readahead_kb != ~0ULL &&
1117                     ctx->readahead_kb > phys_mem_kb)
1118                         ctx->readahead_kb = phys_mem_kb;
1119         }
1120
1121         /* Turn off discard in read-only mode */
1122         if ((ctx->options & E2F_OPT_NO) &&
1123             (ctx->options & E2F_OPT_DISCARD))
1124                 ctx->options &= ~E2F_OPT_DISCARD;
1125
1126         if (flush) {
1127                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
1128                 if (fd < 0) {
1129                         com_err("open", errno,
1130                                 _("while opening %s for flushing"),
1131                                 ctx->filesystem_name);
1132                         fatal_error(ctx, 0);
1133                 }
1134                 if ((retval = ext2fs_sync_device(fd, 1))) {
1135                         com_err("ext2fs_sync_device", retval,
1136                                 _("while trying to flush %s"),
1137                                 ctx->filesystem_name);
1138                         fatal_error(ctx, 0);
1139                 }
1140                 close(fd);
1141         }
1142         if (cflag && bad_blocks_file) {
1143                 fprintf(stderr, "%s", _("The -c and the -l/-L options may not "
1144                                         "be both used at the same time.\n"));
1145                 exit(FSCK_USAGE);
1146         }
1147 #ifdef HAVE_SIGNAL_H
1148         /*
1149          * Set up signal action
1150          */
1151         memset(&sa, 0, sizeof(struct sigaction));
1152         sa.sa_handler = signal_cancel;
1153         sigaction(SIGINT, &sa, 0);
1154         sigaction(SIGTERM, &sa, 0);
1155 #ifdef SA_RESTART
1156         sa.sa_flags = SA_RESTART;
1157 #endif
1158         sa.sa_handler = signal_progress_on;
1159         sigaction(SIGUSR1, &sa, 0);
1160         sa.sa_handler = signal_progress_off;
1161         sigaction(SIGUSR2, &sa, 0);
1162 #endif
1163
1164         /* Update our PATH to include /sbin if we need to run badblocks  */
1165         if (cflag) {
1166                 char *oldpath = getenv("PATH");
1167                 char *newpath;
1168                 int len = sizeof(PATH_SET) + 1;
1169
1170                 if (oldpath)
1171                         len += strlen(oldpath);
1172
1173                 newpath = malloc(len);
1174                 if (!newpath)
1175                         fatal_error(ctx, "Couldn't malloc() newpath");
1176                 strcpy(newpath, PATH_SET);
1177
1178                 if (oldpath) {
1179                         strcat(newpath, ":");
1180                         strcat(newpath, oldpath);
1181                 }
1182                 putenv(newpath);
1183         }
1184 #ifdef CONFIG_JBD_DEBUG
1185         jbd_debug = getenv("E2FSCK_JBD_DEBUG");
1186         if (jbd_debug) {
1187                 res = sscanf(jbd_debug, "%d", &journal_enable_debug);
1188                 if (res != 1) {
1189                         fprintf(stderr,
1190                                 _("E2FSCK_JBD_DEBUG \"%s\" not an integer\n\n"),
1191                                 jbd_debug);
1192                         exit (1);
1193                 }
1194         }
1195 #endif
1196         return 0;
1197
1198 sscanf_err:
1199         fprintf(stderr, _("\nInvalid non-numeric argument to -%c (\"%s\")\n\n"),
1200                 c, optarg);
1201         exit (1);
1202 }
1203
1204 static errcode_t try_open_fs(e2fsck_t ctx, int flags, io_manager io_ptr,
1205                              ext2_filsys *ret_fs)
1206 {
1207         errcode_t retval;
1208
1209         *ret_fs = NULL;
1210
1211         if (ctx->superblock) {
1212                 unsigned long blocksize = ctx->blocksize;
1213
1214                 if (!blocksize) {
1215                         for (blocksize = EXT2_MIN_BLOCK_SIZE;
1216                              blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
1217
1218                                 retval = ext2fs_open2(ctx->filesystem_name,
1219                                                       ctx->io_options, flags,
1220                                                       ctx->superblock, blocksize,
1221                                                       unix_io_manager, ret_fs);
1222                                 if (*ret_fs) {
1223                                         ext2fs_free(*ret_fs);
1224                                         *ret_fs = NULL;
1225                                 }
1226                                 if (!retval)
1227                                         break;
1228                         }
1229                         if (retval)
1230                                 return retval;
1231                 }
1232
1233                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1234                                       flags, ctx->superblock, blocksize,
1235                                       io_ptr, ret_fs);
1236         } else
1237                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1238                                       flags, 0, 0, io_ptr, ret_fs);
1239
1240         if (retval == 0) {
1241                 (*ret_fs)->priv_data = ctx;
1242                 e2fsck_set_bitmap_type(*ret_fs, EXT2FS_BMAP64_RBTREE,
1243                                        "default", NULL);
1244         }
1245         return retval;
1246 }
1247
1248 static const char *my_ver_string = E2FSPROGS_VERSION;
1249 static const char *my_ver_date = E2FSPROGS_DATE;
1250
1251 static errcode_t e2fsck_check_mmp(ext2_filsys fs, e2fsck_t ctx)
1252 {
1253         struct mmp_struct *mmp_s;
1254         unsigned int mmp_check_interval;
1255         errcode_t retval = 0;
1256         struct problem_context pctx;
1257         unsigned int wait_time = 0;
1258
1259         clear_problem_context(&pctx);
1260         if (fs->mmp_buf == NULL) {
1261                 retval = ext2fs_get_mem(fs->blocksize, &fs->mmp_buf);
1262                 if (retval)
1263                         goto check_error;
1264         }
1265
1266         retval = ext2fs_mmp_read(fs, fs->super->s_mmp_block, fs->mmp_buf);
1267         if (retval)
1268                 goto check_error;
1269
1270         mmp_s = fs->mmp_buf;
1271
1272         mmp_check_interval = fs->super->s_mmp_update_interval;
1273         if (mmp_check_interval < EXT4_MMP_MIN_CHECK_INTERVAL)
1274                 mmp_check_interval = EXT4_MMP_MIN_CHECK_INTERVAL;
1275
1276         /*
1277          * If check_interval in MMP block is larger, use that instead of
1278          * check_interval from the superblock.
1279          */
1280         if (mmp_s->mmp_check_interval > mmp_check_interval)
1281                 mmp_check_interval = mmp_s->mmp_check_interval;
1282
1283         wait_time = mmp_check_interval * 2 + 1;
1284
1285         if (mmp_s->mmp_seq == EXT4_MMP_SEQ_CLEAN)
1286                 retval = 0;
1287         else if (mmp_s->mmp_seq == EXT4_MMP_SEQ_FSCK)
1288                 retval = EXT2_ET_MMP_FSCK_ON;
1289         else if (mmp_s->mmp_seq > EXT4_MMP_SEQ_MAX)
1290                 retval = EXT2_ET_MMP_UNKNOWN_SEQ;
1291
1292         if (retval)
1293                 goto check_error;
1294
1295         /* Print warning if e2fsck will wait for more than 20 secs. */
1296         if (verbose || wait_time > EXT4_MMP_MIN_CHECK_INTERVAL * 4) {
1297                 log_out(ctx, _("MMP interval is %u seconds and total wait "
1298                                "time is %u seconds. Please wait...\n"),
1299                         mmp_check_interval, wait_time * 2);
1300         }
1301
1302         return 0;
1303
1304 check_error:
1305
1306         if (retval == EXT2_ET_MMP_BAD_BLOCK) {
1307                 if (fix_problem(ctx, PR_0_MMP_INVALID_BLK, &pctx)) {
1308                         fs->super->s_mmp_block = 0;
1309                         ext2fs_mark_super_dirty(fs);
1310                         retval = 0;
1311                 }
1312         } else if (retval == EXT2_ET_MMP_FAILED) {
1313                 com_err(ctx->program_name, retval, "%s",
1314                         _("while checking MMP block"));
1315                 dump_mmp_msg(fs->mmp_buf, NULL);
1316         } else if (retval == EXT2_ET_MMP_FSCK_ON ||
1317                    retval == EXT2_ET_MMP_UNKNOWN_SEQ) {
1318                 com_err(ctx->program_name, retval, "%s",
1319                         _("while checking MMP block"));
1320                 dump_mmp_msg(fs->mmp_buf,
1321                              _("If you are sure the filesystem is not "
1322                                "in use on any node, run:\n"
1323                                "'tune2fs -f -E clear_mmp %s'\n"),
1324                              ctx->device_name);
1325         } else if (retval == EXT2_ET_MMP_MAGIC_INVALID) {
1326                 if (fix_problem(ctx, PR_0_MMP_INVALID_MAGIC, &pctx)) {
1327                         ext2fs_mmp_clear(fs);
1328                         retval = 0;
1329                 }
1330         } else if (retval == EXT2_ET_MMP_CSUM_INVALID) {
1331                 if (fix_problem(ctx, PR_0_MMP_CSUM_INVALID, &pctx)) {
1332                         ext2fs_mmp_clear(fs);
1333                         retval = 0;
1334                 }
1335         } else
1336                 com_err(ctx->program_name, retval, "%s",
1337                         _("while reading MMP block"));
1338         return retval;
1339 }
1340
1341 static int e2fsck_setup_tdb(e2fsck_t ctx, io_manager *io_ptr)
1342 {
1343         errcode_t retval = ENOMEM;
1344         char *tdb_dir = NULL, *tdb_file = NULL;
1345         char *dev_name, *tmp_name;
1346         int free_tdb_dir = 0;
1347
1348         /* (re)open a specific undo file */
1349         if (ctx->undo_file && ctx->undo_file[0] != 0) {
1350                 retval = set_undo_io_backing_manager(*io_ptr);
1351                 if (retval)
1352                         goto err;
1353                 *io_ptr = undo_io_manager;
1354                 retval = set_undo_io_backup_file(ctx->undo_file);
1355                 if (retval)
1356                         goto err;
1357                 printf(_("Overwriting existing filesystem; this can be undone "
1358                          "using the command:\n"
1359                          "    e2undo %s %s\n\n"),
1360                         ctx->undo_file, ctx->filesystem_name);
1361                 return retval;
1362         }
1363
1364         /*
1365          * Configuration via a conf file would be
1366          * nice
1367          */
1368         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
1369         if (!tdb_dir) {
1370                 profile_get_string(ctx->profile, "defaults",
1371                                    "undo_dir", 0, "/var/lib/e2fsprogs",
1372                                    &tdb_dir);
1373                 free_tdb_dir = 1;
1374         }
1375
1376         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
1377             access(tdb_dir, W_OK)) {
1378                 if (free_tdb_dir)
1379                         free(tdb_dir);
1380                 return 0;
1381         }
1382
1383         tmp_name = strdup(ctx->filesystem_name);
1384         if (!tmp_name)
1385                 goto errout;
1386         dev_name = basename(tmp_name);
1387         tdb_file = malloc(strlen(tdb_dir) + 8 + strlen(dev_name) + 7 + 1);
1388         if (!tdb_file) {
1389                 free(tmp_name);
1390                 goto errout;
1391         }
1392         sprintf(tdb_file, "%s/e2fsck-%s.e2undo", tdb_dir, dev_name);
1393         free(tmp_name);
1394
1395         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
1396                 retval = errno;
1397                 com_err(ctx->program_name, retval,
1398                         _("while trying to delete %s"), tdb_file);
1399                 goto errout;
1400         }
1401
1402         retval = set_undo_io_backing_manager(*io_ptr);
1403         if (retval)
1404                 goto errout;
1405         *io_ptr = undo_io_manager;
1406         retval = set_undo_io_backup_file(tdb_file);
1407         if (retval)
1408                 goto errout;
1409         printf(_("Overwriting existing filesystem; this can be undone "
1410                  "using the command:\n"
1411                  "    e2undo %s %s\n\n"), tdb_file, ctx->filesystem_name);
1412
1413         if (free_tdb_dir)
1414                 free(tdb_dir);
1415         free(tdb_file);
1416         return 0;
1417
1418 errout:
1419         if (free_tdb_dir)
1420                 free(tdb_dir);
1421         free(tdb_file);
1422 err:
1423         com_err(ctx->program_name, retval, "%s",
1424                 _("while trying to setup undo file\n"));
1425         return retval;
1426 }
1427
1428 int main (int argc, char *argv[])
1429 {
1430         errcode_t       retval = 0, retval2 = 0, orig_retval = 0;
1431         int             exit_value = FSCK_OK;
1432         ext2_filsys     fs = 0;
1433         io_manager      io_ptr;
1434         struct ext2_super_block *sb;
1435         const char      *lib_ver_date;
1436         int             my_ver, lib_ver;
1437         e2fsck_t        ctx;
1438         blk64_t         orig_superblock = ~(blk64_t)0;
1439         struct problem_context pctx;
1440         int flags, run_result, was_changed;
1441         int journal_size;
1442         int sysval, sys_page_size = 4096;
1443         int old_bitmaps;
1444         __u32 features[3];
1445         char *cp;
1446         enum quota_type qtype;
1447         struct ext2fs_journal_params jparams;
1448
1449         clear_problem_context(&pctx);
1450         sigcatcher_setup();
1451 #ifdef MTRACE
1452         mtrace();
1453 #endif
1454 #ifdef MCHECK
1455         mcheck(0);
1456 #endif
1457 #ifdef ENABLE_NLS
1458         setlocale(LC_MESSAGES, "");
1459         setlocale(LC_CTYPE, "");
1460         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1461         textdomain(NLS_CAT_NAME);
1462         set_com_err_gettext(gettext);
1463 #endif
1464         my_ver = ext2fs_parse_version_string(my_ver_string);
1465         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
1466         if (my_ver > lib_ver) {
1467                 fprintf( stderr, "%s",
1468                          _("Error: ext2fs library version out of date!\n"));
1469                 show_version_only++;
1470         }
1471
1472         retval = PRS(argc, argv, &ctx);
1473         if (retval) {
1474                 com_err("e2fsck", retval, "%s",
1475                         _("while trying to initialize program"));
1476                 exit(FSCK_ERROR);
1477         }
1478         reserve_stdio_fds();
1479
1480         ctx->global_ctx = NULL;
1481         set_up_logging(ctx);
1482         if (ctx->logf) {
1483                 int i;
1484
1485                 fputs("E2fsck run: ", ctx->logf);
1486                 for (i = 0; i < argc; i++) {
1487                         if (i)
1488                                 fputc(' ', ctx->logf);
1489                         fputs(argv[i], ctx->logf);
1490                 }
1491                 fputc('\n', ctx->logf);
1492         }
1493         if (ctx->problem_logf) {
1494                 int i;
1495
1496                 fputs("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n",
1497                       ctx->problem_logf);
1498                 fprintf(ctx->problem_logf, "<problem_log time=\"%lu\">\n",
1499                         (unsigned long) ctx->now);
1500                 fprintf(ctx->problem_logf, "<invocation prog=\"%s\"",
1501                         argv[0]);
1502                 for (i = 1; i < argc; i++)
1503                         fprintf(ctx->problem_logf, " arg%d=\"%s\"", i, argv[i]);
1504                 fputs("/>\n", ctx->problem_logf);
1505         }
1506
1507         init_resource_track(&ctx->global_rtrack, NULL);
1508         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
1509                 log_err(ctx, "e2fsck %s (%s)\n", my_ver_string,
1510                          my_ver_date);
1511
1512         if (show_version_only) {
1513                 log_err(ctx, _("\tUsing %s, %s\n"),
1514                         error_message(EXT2_ET_BASE), lib_ver_date);
1515                 exit(FSCK_OK);
1516         }
1517
1518         check_mount(ctx);
1519
1520         if (!(ctx->options & E2F_OPT_PREEN) &&
1521             !(ctx->options & E2F_OPT_NO) &&
1522             !(ctx->options & E2F_OPT_YES)) {
1523                 if (!ctx->interactive)
1524                         fatal_error(ctx,
1525                                     _("need terminal for interactive repairs"));
1526         }
1527         ctx->superblock = ctx->use_superblock;
1528
1529         flags = EXT2_FLAG_SKIP_MMP | EXT2_FLAG_THREADS;
1530 restart:
1531 #ifdef CONFIG_TESTIO_DEBUG
1532         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1533                 io_ptr = test_io_manager;
1534                 test_io_backing_manager = unix_io_manager;
1535         } else
1536 #endif
1537                 io_ptr = unix_io_manager;
1538         flags |= EXT2_FLAG_NOFREE_ON_ERROR;
1539         profile_get_boolean(ctx->profile, "options", "old_bitmaps", 0, 0,
1540                             &old_bitmaps);
1541         if (!old_bitmaps)
1542                 flags |= EXT2_FLAG_64BITS;
1543         if ((ctx->options & E2F_OPT_READONLY) == 0) {
1544                 flags |= EXT2_FLAG_RW;
1545                 if (!(ctx->mount_flags & EXT2_MF_ISROOT &&
1546                       ctx->mount_flags & EXT2_MF_READONLY))
1547                         flags |= EXT2_FLAG_EXCLUSIVE;
1548                 if ((ctx->mount_flags & EXT2_MF_READONLY) &&
1549                     (ctx->options & E2F_OPT_FORCE))
1550                         flags &= ~EXT2_FLAG_EXCLUSIVE;
1551         }
1552
1553         if (ctx->undo_file) {
1554                 retval = e2fsck_setup_tdb(ctx, &io_ptr);
1555                 if (retval)
1556                         exit(FSCK_ERROR);
1557         }
1558
1559         ctx->openfs_flags = flags;
1560         ctx->io_manager = io_ptr;
1561         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1562
1563         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
1564             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
1565             ((retval == EXT2_ET_BAD_MAGIC) ||
1566              (retval == EXT2_ET_SB_CSUM_INVALID) ||
1567              (retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1568              ((retval == 0) && (retval2 = ext2fs_check_desc(fs))))) {
1569                 if (retval) {
1570                         pctx.errcode = retval;
1571                         fix_problem(ctx, PR_0_OPEN_FAILED, &pctx);
1572                 }
1573                 if (retval2) {
1574                         pctx.errcode = retval2;
1575                         fix_problem(ctx, PR_0_CHECK_DESC_FAILED, &pctx);
1576                 }
1577                 pctx.errcode = 0;
1578                 if (retval2 == ENOMEM || retval2 == EXT2_ET_NO_MEMORY) {
1579                         retval = retval2;
1580                         goto failure;
1581                 }
1582                 if (fs->flags & EXT2_FLAG_NOFREE_ON_ERROR) {
1583                         ext2fs_free(fs);
1584                         fs = NULL;
1585                 }
1586                 if (!fs || (fs->group_desc_count > 1)) {
1587                         log_out(ctx, _("%s: %s trying backup blocks...\n"),
1588                                 ctx->program_name,
1589                                 retval ? _("Superblock invalid,") :
1590                                 _("Group descriptors look bad..."));
1591                         orig_superblock = ctx->superblock;
1592                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
1593                         if (fs)
1594                                 ext2fs_close_free(&fs);
1595                         orig_retval = retval;
1596                         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1597                         if ((orig_retval == 0) && retval != 0) {
1598                                 if (fs)
1599                                         ext2fs_close_free(&fs);
1600                                 log_out(ctx, _("%s: %s while using the "
1601                                                "backup blocks"),
1602                                         ctx->program_name,
1603                                         error_message(retval));
1604                                 log_out(ctx, _("%s: going back to original "
1605                                                "superblock\n"),
1606                                         ctx->program_name);
1607                                 ctx->superblock = orig_superblock;
1608                                 retval = try_open_fs(ctx, flags, io_ptr, &fs);
1609                         }
1610                 }
1611         }
1612         if (((retval == EXT2_ET_UNSUPP_FEATURE) ||
1613              (retval == EXT2_ET_RO_UNSUPP_FEATURE)) &&
1614             fs && fs->super) {
1615                 sb = fs->super;
1616                 features[0] = (sb->s_feature_compat &
1617                                ~EXT2_LIB_FEATURE_COMPAT_SUPP);
1618                 features[1] = (sb->s_feature_incompat &
1619                                ~EXT2_LIB_FEATURE_INCOMPAT_SUPP);
1620                 features[2] = (sb->s_feature_ro_compat &
1621                                ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1622                 if (features[0] || features[1] || features[2])
1623                         goto print_unsupp_features;
1624         }
1625 failure:
1626         if (retval) {
1627                 if (orig_retval)
1628                         retval = orig_retval;
1629                 com_err(ctx->program_name, retval, _("while trying to open %s"),
1630                         ctx->filesystem_name);
1631                 if (retval == EXT2_ET_REV_TOO_HIGH) {
1632                         log_out(ctx, "%s",
1633                                 _("The filesystem revision is apparently "
1634                                   "too high for this version of e2fsck.\n"
1635                                   "(Or the filesystem superblock "
1636                                   "is corrupt)\n\n"));
1637                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1638                 } else if (retval == EXT2_ET_SHORT_READ)
1639                         log_out(ctx, "%s",
1640                                 _("Could this be a zero-length partition?\n"));
1641                 else if ((retval == EPERM) || (retval == EACCES))
1642                         log_out(ctx, _("You must have %s access to the "
1643                                        "filesystem or be root\n"),
1644                                (ctx->options & E2F_OPT_READONLY) ?
1645                                "r/o" : "r/w");
1646                 else if (retval == ENXIO)
1647                         log_out(ctx, "%s",
1648                                 _("Possibly non-existent or swap device?\n"));
1649                 else if (retval == EBUSY)
1650                         log_out(ctx, "%s", _("Filesystem mounted or opened "
1651                                          "exclusively by another program?\n"));
1652                 else if (retval == ENOENT)
1653                         log_out(ctx, "%s",
1654                                 _("Possibly non-existent device?\n"));
1655 #ifdef EROFS
1656                 else if (retval == EROFS)
1657                         log_out(ctx, "%s", _("Disk write-protected; use the "
1658                                              "-n option to do a read-only\n"
1659                                              "check of the device.\n"));
1660 #endif
1661                 else {
1662                         /*
1663                          * Let's try once more will less consistency checking
1664                          * so that we are able to recover from more errors
1665                          * (e.g. some tool messing up some value in the sb).
1666                          */
1667                         if (((retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1668                              (retval == EXT2_ET_BAD_DESC_SIZE)) &&
1669                             !(flags & EXT2_FLAG_IGNORE_SB_ERRORS)) {
1670                                 if (fs)
1671                                         ext2fs_close_free(&fs);
1672                                 log_out(ctx, _("%s: Trying to load superblock "
1673                                         "despite errors...\n"),
1674                                         ctx->program_name);
1675                                 flags |= EXT2_FLAG_IGNORE_SB_ERRORS;
1676                                 /*
1677                                  * If we tried backup sb, revert to the
1678                                  * original one now.
1679                                  */
1680                                 if (orig_superblock != ~(blk64_t)0)
1681                                         ctx->superblock = orig_superblock;
1682                                 goto restart;
1683                         }
1684                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1685                         if (retval == EXT2_ET_BAD_MAGIC)
1686                                 check_plausibility(ctx->filesystem_name,
1687                                                    CHECK_FS_EXIST, NULL);
1688                 }
1689                 fatal_error(ctx, 0);
1690         }
1691         /*
1692          * We only update the master superblock because (a) paranoia;
1693          * we don't want to corrupt the backup superblocks, and (b) we
1694          * don't need to update the mount count and last checked
1695          * fields in the backup superblock (the kernel doesn't update
1696          * the backup superblocks anyway).  With newer versions of the
1697          * library this flag is set by ext2fs_open2(), but we set this
1698          * here just to be sure.  (No, we don't support e2fsck running
1699          * with some other libext2fs than the one that it was shipped
1700          * with, but just in case....)
1701          */
1702         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
1703
1704         if (!(ctx->flags & E2F_FLAG_GOT_DEVSIZE)) {
1705                 __u32 blocksize = EXT2_BLOCK_SIZE(fs->super);
1706                 int need_restart = 0;
1707
1708                 pctx.errcode = ext2fs_get_device_size2(ctx->filesystem_name,
1709                                                        blocksize,
1710                                                        &ctx->num_blocks);
1711                 /*
1712                  * The floppy driver refuses to allow anyone else to
1713                  * open the device if has been opened with O_EXCL;
1714                  * this is unlike other block device drivers in Linux.
1715                  * To handle this, we close the filesystem and then
1716                  * reopen the filesystem after we get the device size.
1717                  */
1718                 if (pctx.errcode == EBUSY) {
1719                         ext2fs_close_free(&fs);
1720                         need_restart++;
1721                         pctx.errcode =
1722                                 ext2fs_get_device_size2(ctx->filesystem_name,
1723                                                         blocksize,
1724                                                         &ctx->num_blocks);
1725                 }
1726                 if (pctx.errcode == EXT2_ET_UNIMPLEMENTED)
1727                         ctx->num_blocks = 0;
1728                 else if (pctx.errcode) {
1729                         fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
1730                         ctx->flags |= E2F_FLAG_ABORT;
1731                         fatal_error(ctx, 0);
1732                 }
1733                 ctx->flags |= E2F_FLAG_GOT_DEVSIZE;
1734                 if (need_restart)
1735                         goto restart;
1736         }
1737
1738         ctx->fs = fs;
1739         fs->now = ctx->now;
1740 #ifdef HAVE_PTHREAD
1741         fs->fs_num_threads = ctx->pfs_num_threads;
1742 #endif
1743         sb = fs->super;
1744
1745         if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
1746                 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
1747                         _("while trying to open %s"),
1748                         ctx->filesystem_name);
1749         get_newer:
1750                 fatal_error(ctx, _("Get a newer version of e2fsck!"));
1751         }
1752
1753         /*
1754          * Set the device name, which is used whenever we print error
1755          * or informational messages to the user.
1756          */
1757         if (ctx->device_name == 0 && sb->s_volume_name[0])
1758                 ctx->device_name = string_copy(ctx, (char *) sb->s_volume_name,
1759                                                sizeof(sb->s_volume_name));
1760
1761         if (ctx->device_name == 0)
1762                 ctx->device_name = string_copy(ctx, ctx->filesystem_name, 0);
1763         for (cp = ctx->device_name; *cp; cp++)
1764                 if (isspace(*cp) || *cp == ':')
1765                         *cp = '_';
1766
1767         if (ctx->problem_logf) {
1768
1769                 fprintf(ctx->problem_logf, "<filesystem dev=\"%s\"",
1770                         ctx->filesystem_name);
1771                 if (!uuid_is_null(sb->s_uuid)) {
1772                         char buf[48];
1773
1774                         uuid_unparse(sb->s_uuid, buf);
1775                         fprintf(ctx->problem_logf, " uuid=\"%s\"", buf);
1776                 }
1777                 if (sb->s_volume_name[0])
1778                         fprintf(ctx->problem_logf, " label=\"%.*s\"",
1779                                 EXT2_LEN_STR(sb->s_volume_name));
1780
1781                 fputs("/>\n", ctx->problem_logf);
1782         }
1783
1784         ehandler_init(fs->io);
1785
1786         if (ext2fs_has_feature_mmp(fs->super) &&
1787             (flags & EXT2_FLAG_SKIP_MMP)) {
1788                 if (e2fsck_check_mmp(fs, ctx))
1789                         fatal_error(ctx, 0);
1790
1791                 /*
1792                  * Restart in order to reopen fs but this time start mmp.
1793                  */
1794                 ext2fs_close_free(&ctx->fs);
1795                 flags &= ~EXT2_FLAG_SKIP_MMP;
1796                 goto restart;
1797         }
1798
1799         if (ctx->logf)
1800                 fprintf(ctx->logf, "Filesystem UUID: %s\n",
1801                         e2p_uuid2str(sb->s_uuid));
1802
1803         /*
1804          * Make sure the ext3 superblock fields are consistent.
1805          */
1806         if ((ctx->mount_flags & (EXT2_MF_MOUNTED | EXT2_MF_BUSY)) == 0) {
1807                 retval = e2fsck_check_ext3_journal(ctx);
1808                 if (retval) {
1809                         com_err(ctx->program_name, retval,
1810                                 _("while checking journal for %s"),
1811                                 ctx->device_name);
1812                         fatal_error(ctx,
1813                                 _("Cannot proceed with file system check"));
1814                 }
1815         }
1816
1817         /*
1818          * Check to see if we need to do ext3-style recovery.  If so,
1819          * do it, and then restart the fsck.
1820          */
1821         if (ext2fs_has_feature_journal_needs_recovery(sb)) {
1822                 if (ctx->options & E2F_OPT_READONLY) {
1823                         log_out(ctx, "%s",
1824                                 _("Warning: skipping journal recovery because "
1825                                   "doing a read-only filesystem check.\n"));
1826                         io_channel_flush(ctx->fs->io);
1827                 } else {
1828                         if (ctx->flags & E2F_FLAG_RESTARTED) {
1829                                 /*
1830                                  * Whoops, we attempted to run the
1831                                  * journal twice.  This should never
1832                                  * happen, unless the hardware or
1833                                  * device driver is being bogus.
1834                                  */
1835                                 com_err(ctx->program_name, 0,
1836                                         _("unable to set superblock flags "
1837                                           "on %s\n"), ctx->device_name);
1838                                 fatal_error(ctx, 0);
1839                         }
1840                         retval = e2fsck_run_ext3_journal(ctx);
1841                         if (retval == EFSBADCRC) {
1842                                 log_out(ctx, _("Journal checksum error "
1843                                                "found in %s\n"),
1844                                         ctx->device_name);
1845                         } else if (retval == EFSCORRUPTED) {
1846                                 log_out(ctx, _("Journal corrupted in %s\n"),
1847                                         ctx->device_name);
1848                         } else if (retval) {
1849                                 com_err(ctx->program_name, retval,
1850                                 _("while recovering journal of %s"),
1851                                         ctx->device_name);
1852                         }
1853                         ext2fs_close_free(&ctx->fs);
1854                         ctx->flags |= E2F_FLAG_RESTARTED;
1855                         goto restart;
1856                 }
1857         }
1858
1859         /*
1860          * Check for compatibility with the feature sets.  We need to
1861          * be more stringent than ext2fs_open().
1862          */
1863         features[0] = sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP;
1864         features[1] = sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP;
1865         features[2] = (sb->s_feature_ro_compat &
1866                        ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1867 print_unsupp_features:
1868         if (features[0] || features[1] || features[2]) {
1869                 int     i, j;
1870                 __u32   *mask = features, m;
1871
1872                 log_err(ctx, _("%s has unsupported feature(s):"),
1873                         ctx->filesystem_name);
1874
1875                 for (i=0; i <3; i++,mask++) {
1876                         for (j=0,m=1; j < 32; j++, m<<=1) {
1877                                 if (*mask & m)
1878                                         log_err(ctx, " %s",
1879                                                 e2p_feature2string(i, m));
1880                         }
1881                 }
1882                 log_err(ctx, "\n");
1883                 goto get_newer;
1884         }
1885
1886         if (ext2fs_has_feature_casefold(sb) && !fs->encoding) {
1887                 log_err(ctx, _("%s has unsupported encoding: %0x\n"),
1888                         ctx->filesystem_name, sb->s_encoding);
1889                 goto get_newer;
1890         }
1891
1892         /*
1893          * If the user specified a specific superblock, presumably the
1894          * master superblock has been trashed.  So we mark the
1895          * superblock as dirty, so it can be written out.
1896          */
1897         if (ctx->superblock &&
1898             !(ctx->options & E2F_OPT_READONLY))
1899                 ext2fs_mark_super_dirty(fs);
1900
1901         /*
1902          * Calculate the number of filesystem blocks per pagesize.  If
1903          * fs->blocksize > page_size, set the number of blocks per
1904          * pagesize to 1 to avoid division by zero errors.
1905          */
1906 #ifdef _SC_PAGESIZE
1907         sysval = sysconf(_SC_PAGESIZE);
1908         if (sysval > 0)
1909                 sys_page_size = sysval;
1910 #endif /* _SC_PAGESIZE */
1911         ctx->blocks_per_page = sys_page_size / fs->blocksize;
1912         if (ctx->blocks_per_page == 0)
1913                 ctx->blocks_per_page = 1;
1914
1915         if (ctx->superblock)
1916                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
1917         ext2fs_mark_valid(fs);
1918         check_super_block(ctx);
1919         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1920                 fatal_error(ctx, 0);
1921         check_if_skip(ctx);
1922         check_resize_inode(ctx);
1923         if (bad_blocks_file)
1924                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
1925         else if (cflag)
1926                 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
1927         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1928                 fatal_error(ctx, 0);
1929
1930         /*
1931          * Mark the system as valid, 'til proven otherwise
1932          */
1933         ext2fs_mark_valid(fs);
1934
1935         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
1936         if (retval) {
1937                 log_out(ctx, _("%s: %s while reading bad blocks inode\n"),
1938                         ctx->program_name, error_message(retval));
1939                 preenhalt(ctx);
1940                 log_out(ctx, "%s", _("This doesn't bode well, "
1941                                      "but we'll try to go on...\n"));
1942         }
1943
1944         /*
1945          * Save the journal size in megabytes.
1946          * Try and use the journal size from the backup else let e2fsck
1947          * find the default journal size. If fast commit feature is enabled,
1948          * it is not clear how many of the journal blocks were fast commit
1949          * blocks. So, ignore the size of journal found in backup.
1950          *
1951          * TODO: Add a new backup type that captures fast commit info as
1952          * well.
1953          */
1954         if (sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS &&
1955                 !ext2fs_has_feature_fast_commit(sb))
1956                 journal_size = (sb->s_jnl_blocks[15] << (32 - 20)) |
1957                                (sb->s_jnl_blocks[16] >> 20);
1958         else
1959                 journal_size = -1;
1960
1961         if (ext2fs_has_feature_quota(sb)) {
1962                 /* Quotas were enabled. Do quota accounting during fsck. */
1963                 clear_problem_context(&pctx);
1964                 pctx.errcode = quota_init_context(&ctx->qctx, ctx->fs, 0);
1965                 if (pctx.errcode) {
1966                         fix_problem(ctx, PR_0_QUOTA_INIT_CTX, &pctx);
1967                         fatal_error(ctx, 0);
1968                 }
1969         }
1970
1971         run_result = e2fsck_run(ctx);
1972         e2fsck_clear_progbar(ctx);
1973
1974         if (!ctx->invalid_bitmaps &&
1975             (ctx->flags & E2F_FLAG_JOURNAL_INODE)) {
1976                 if (fix_problem(ctx, PR_6_RECREATE_JOURNAL, &pctx)) {
1977                         if (journal_size < 1024) {
1978                                 ext2fs_get_journal_params(&jparams, fs);
1979                         } else {
1980                                 jparams.num_journal_blocks = journal_size;
1981                                 jparams.num_fc_blocks = 0;
1982                         }
1983                         log_out(ctx, _("Creating journal (%d blocks): "),
1984                                jparams.num_journal_blocks);
1985                         fflush(stdout);
1986                         retval = ext2fs_add_journal_inode3(fs, &jparams, ~0ULL, 0);
1987                         if (retval) {
1988                                 log_out(ctx, "%s: while trying to create "
1989                                         "journal\n", error_message(retval));
1990                                 goto no_journal;
1991                         }
1992                         log_out(ctx, "%s", _(" Done.\n"));
1993                         log_out(ctx, "%s",
1994                                 _("\n*** journal has been regenerated ***\n"));
1995                 }
1996         }
1997 no_journal:
1998
1999         if (run_result & E2F_FLAG_ABORT) {
2000                 fatal_error(ctx, _("aborted"));
2001         } else if (run_result & E2F_FLAG_CANCEL) {
2002                 log_out(ctx, _("%s: e2fsck canceled.\n"), ctx->device_name ?
2003                         ctx->device_name : ctx->filesystem_name);
2004                 exit_value |= FSCK_CANCELED;
2005         } else if (ctx->qctx && !ctx->invalid_bitmaps) {
2006                 int needs_writeout;
2007
2008                 for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
2009                         if (*quota_sb_inump(sb, qtype) == 0)
2010                                 continue;
2011                         needs_writeout = 0;
2012                         pctx.num = qtype;
2013                         retval = quota_compare_and_update(ctx->qctx, qtype,
2014                                                           &needs_writeout);
2015                         if ((retval || needs_writeout) &&
2016                             fix_problem(ctx, PR_6_UPDATE_QUOTAS, &pctx)) {
2017                                 pctx.errcode = quota_write_inode(ctx->qctx,
2018                                                                  1 << qtype);
2019                                 if (pctx.errcode)
2020                                         (void) fix_problem(ctx,
2021                                                 PR_6_WRITE_QUOTAS, &pctx);
2022                         }
2023                 }
2024                 quota_release_context(&ctx->qctx);
2025         }
2026
2027         if (run_result == E2F_FLAG_RESTART) {
2028                 log_out(ctx, "%s",
2029                         _("Restarting e2fsck from the beginning...\n"));
2030                 retval = e2fsck_reset_context(ctx);
2031                 if (retval) {
2032                         com_err(ctx->program_name, retval, "%s",
2033                                 _("while resetting context"));
2034                         fatal_error(ctx, 0);
2035                 }
2036                 ext2fs_close_free(&ctx->fs);
2037                 goto restart;
2038         }
2039
2040 #ifdef MTRACE
2041         mtrace_print("Cleanup");
2042 #endif
2043         was_changed = ext2fs_test_changed(fs);
2044         if (!(ctx->flags & E2F_FLAG_RUN_RETURN) &&
2045             !(ctx->options & E2F_OPT_READONLY)) {
2046                 if (ext2fs_test_valid(fs)) {
2047                         if (!(sb->s_state & EXT2_VALID_FS))
2048                                 exit_value |= FSCK_NONDESTRUCT;
2049                         sb->s_state = EXT2_VALID_FS;
2050                         if (check_backup_super_block(ctx))
2051                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2052                 } else
2053                         sb->s_state &= ~EXT2_VALID_FS;
2054                 if (!(ctx->flags & E2F_FLAG_TIME_INSANE))
2055                         sb->s_lastcheck = ctx->now;
2056                 sb->s_mnt_count = 0;
2057                 memset(((char *) sb) + EXT4_S_ERR_START, 0, EXT4_S_ERR_LEN);
2058                 pctx.errcode = ext2fs_set_gdt_csum(ctx->fs);
2059                 if (pctx.errcode)
2060                         fix_problem(ctx, PR_6_SET_BG_CHECKSUM, &pctx);
2061                 ext2fs_mark_super_dirty(fs);
2062         }
2063
2064         if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2065             (ctx->options & E2F_OPT_UNSHARE_BLOCKS) &&
2066             (ctx->options & E2F_OPT_NO))
2067                 /* Don't try to write or flush I/O, we just wanted to know whether or
2068                  * not there were enough free blocks to undo deduplication.
2069                  */
2070                 goto skip_write;
2071
2072         if (!(ctx->options & E2F_OPT_READONLY)) {
2073                 e2fsck_write_bitmaps(ctx);
2074                 if (fs->flags & EXT2_FLAG_DIRTY) {
2075                         pctx.errcode = ext2fs_flush(ctx->fs);
2076                         if (pctx.errcode)
2077                                 fix_problem(ctx, PR_6_FLUSH_FILESYSTEM, &pctx);
2078                 }
2079                 pctx.errcode = io_channel_flush(ctx->fs->io);
2080                 if (pctx.errcode)
2081                         fix_problem(ctx, PR_6_IO_FLUSH, &pctx);
2082         }
2083
2084         if (was_changed) {
2085                 int fs_fixed = (ctx->flags & E2F_FLAG_PROBLEMS_FIXED);
2086
2087                 if (fs_fixed)
2088                         exit_value |= FSCK_NONDESTRUCT;
2089                 if (!(ctx->options & E2F_OPT_PREEN)) {
2090 #if 0   /* Do this later; it breaks too many tests' golden outputs */
2091                         log_out(ctx, fs_fixed ?
2092                                 _("\n%s: ***** FILE SYSTEM ERRORS "
2093                                   "CORRECTED *****\n") :
2094                                 _("%s: File system was modified.\n"),
2095                                 ctx->device_name);
2096 #else
2097                         log_out(ctx,
2098                                 _("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
2099                                 ctx->device_name);
2100 #endif
2101                 }
2102                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
2103                         log_out(ctx, _("%s: ***** REBOOT SYSTEM *****\n"),
2104                                 ctx->device_name);
2105                         exit_value |= FSCK_REBOOT;
2106                 }
2107         }
2108
2109 skip_write:
2110         if (!ext2fs_test_valid(fs) ||
2111             ((exit_value & FSCK_CANCELED) &&
2112              (sb->s_state & EXT2_ERROR_FS))) {
2113                 log_out(ctx, _("\n%s: ********** WARNING: Filesystem still has "
2114                                "errors **********\n\n"), ctx->device_name);
2115                 exit_value |= FSCK_UNCORRECTED;
2116                 exit_value &= ~FSCK_NONDESTRUCT;
2117         }
2118         if (exit_value & FSCK_CANCELED) {
2119                 int     allow_cancellation;
2120
2121                 profile_get_boolean(ctx->profile, "options",
2122                                     "allow_cancellation", 0, 0,
2123                                     &allow_cancellation);
2124                 exit_value &= ~FSCK_NONDESTRUCT;
2125                 if (allow_cancellation && ext2fs_test_valid(fs) &&
2126                     (sb->s_state & EXT2_VALID_FS) &&
2127                     !(sb->s_state & EXT2_ERROR_FS))
2128                         exit_value = 0;
2129         } else
2130                 show_stats(ctx);
2131
2132         print_resource_track(ctx, NULL, &ctx->global_rtrack, ctx->fs->io);
2133
2134         ext2fs_close_free(&ctx->fs);
2135         free(ctx->journal_name);
2136
2137         if (ctx->logf)
2138                 fprintf(ctx->logf, "Exit status: %d\n", exit_value);
2139         e2fsck_free_context(ctx);
2140         remove_error_table(&et_ext2_error_table);
2141         remove_error_table(&et_prof_error_table);
2142         return exit_value;
2143 }