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            *extended_opts = 0;
 825         char            *cp;
 826         int             res;            /* result of sscanf */
 827 #ifdef CONFIG_JBD_DEBUG
 828         char            *jbd_debug;
 829 #endif
 830         unsigned long long phys_mem_kb, blk;
 831
 832         retval = e2fsck_allocate_context(&ctx);
 833         if (retval)
 834                 return retval;
 835
 836         *ret_ctx = ctx;
 837         e2fsck_global_ctx = ctx;
 838
 839         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
 840         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
 841         if (getenv("E2FSCK_FORCE_INTERACTIVE") || (isatty(0) && isatty(1))) {
 842                 ctx->interactive = 1;
 843         } else {
 844                 ctx->start_meta[0] = '\001';
 845                 ctx->stop_meta[0] = '\002';
 846         }
 847         memset(bar, '=', sizeof(bar)-1);
 848         memset(spaces, ' ', sizeof(spaces)-1);
 849         add_error_table(&et_ext2_error_table);
 850         add_error_table(&et_prof_error_table);
 851         blkid_get_cache(&ctx->blkid, NULL);
 852
 853         if (argc && *argv)
 854                 ctx->program_name = *argv;
 855         else
 856                 usage(NULL);
 857
 858         phys_mem_kb = get_memory_size() / 1024;
 859         ctx->readahead_kb = ~0ULL;
 860
 861 #ifdef HAVE_PTHREAD
 862         while ((c = getopt(argc, argv, "pamnyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDkz:")) != EOF)
 863 #else
 864         while ((c = getopt(argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDkz:")) != EOF)
 865 #endif
 866                 switch (c) {
 867                 case 'C':
 868                         ctx->progress = e2fsck_update_progress;
 869                         res = sscanf(optarg, "%d", &ctx->progress_fd);
 870                         if (res != 1)
 871                                 goto sscanf_err;
 872
 873                         if (ctx->progress_fd < 0) {
 874                                 ctx->progress = 0;
 875                                 ctx->progress_fd = ctx->progress_fd * -1;
 876                         }
 877                         if (!ctx->progress_fd)
 878                                 break;
 879                         /* Validate the file descriptor to avoid disasters */
 880                         fd = dup(ctx->progress_fd);
 881                         if (fd < 0) {
 882                                 fprintf(stderr,
 883                                 _("Error validating file descriptor %d: %s\n"),
 884                                         ctx->progress_fd,
 885                                         error_message(errno));
 886                                 fatal_error(ctx,
 887                         _("Invalid completion information file descriptor"));
 888                         } else
 889                                 close(fd);
 890                         break;
 891                 case 'D':
 892                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 893                         break;
 894                 case 'E':
 895                         extended_opts = optarg;
 896                         break;
 897                 case 'p':
 898                 case 'a':
 899                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
 900                         conflict_opt:
 901                                 fatal_error(ctx,
 902         _("Only one of the options -p/-a, -n or -y may be specified."));
 903                         }
 904                         ctx->options |= E2F_OPT_PREEN;
 905                         break;
 906 #ifdef HAVE_PTHREAD
 907                 case 'm':
 908                         ctx->options |= E2F_OPT_MULTITHREAD;
 909                         break;
 910 #endif
 911                 case 'n':
 912                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
 913                                 goto conflict_opt;
 914                         ctx->options |= E2F_OPT_NO;
 915                         break;
 916                 case 'y':
 917                         if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
 918                                 goto conflict_opt;
 919                         ctx->options |= E2F_OPT_YES;
 920                         break;
 921                 case 't':
 922 #ifdef RESOURCE_TRACK
 923                         if (ctx->options & E2F_OPT_TIME)
 924                                 ctx->options |= E2F_OPT_TIME2;
 925                         else
 926                                 ctx->options |= E2F_OPT_TIME;
 927 #else
 928                         fprintf(stderr, _("The -t option is not "
 929                                 "supported on this version of e2fsck.\n"));
 930 #endif
 931                         break;
 932                 case 'c':
 933                         if (cflag++)
 934                                 ctx->options |= E2F_OPT_WRITECHECK;
 935                         ctx->options |= E2F_OPT_CHECKBLOCKS;
 936                         break;
 937                 case 'r':
 938                         /* What we do by default, anyway! */
 939                         break;
 940                 case 'b':
 941                         res = sscanf(optarg, "%llu", &blk);
 942                         ctx->use_superblock = blk;
 943                         if (res != 1)
 944                                 goto sscanf_err;
 945                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
 946                         break;
 947                 case 'B':
 948                         ctx->blocksize = atoi(optarg);
 949                         break;
 950                 case 'I':
 951                         res = sscanf(optarg, "%d", &ctx->inode_buffer_blocks);
 952                         if (res != 1)
 953                                 goto sscanf_err;
 954                         break;
 955                 case 'j':
 956                         ctx->journal_name = get_devname(ctx->blkid,
 957                                                         optarg, NULL);
 958                         if (!ctx->journal_name) {
 959                                 com_err(ctx->program_name, 0,
 960                                         _("Unable to resolve '%s'"),
 961                                         optarg);
 962                                 fatal_error(ctx, 0);
 963                         }
 964                         break;
 965                 case 'P':
 966                         res = sscanf(optarg, "%d", &ctx->process_inode_size);
 967                         if (res != 1)
 968                                 goto sscanf_err;
 969                         break;
 970                 case 'L':
 971                         replace_bad_blocks++;
 972                         /* fall through */
 973                 case 'l':
 974                         if (bad_blocks_file)
 975                                 free(bad_blocks_file);
 976                         bad_blocks_file = string_copy(ctx, optarg, 0);
 977                         break;
 978                 case 'd':
 979                         ctx->options |= E2F_OPT_DEBUG;
 980                         break;
 981                 case 'f':
 982                         ctx->options |= E2F_OPT_FORCE;
 983                         break;
 984                 case 'F':
 985                         flush = 1;
 986                         break;
 987                 case 'v':
 988                         verbose = 1;
 989                         break;
 990                 case 'V':
 991                         show_version_only = 1;
 992                         break;
 993 #ifdef MTRACE
 994                 case 'M':
 995                         mallwatch = (void *) strtol(optarg, NULL, 0);
 996                         break;
 997 #endif
 998                 case 'N':
 999                         ctx->device_name = string_copy(ctx, optarg, 0);
1000                         break;
1001                 case 'k':
1002                         keep_bad_blocks++;
1003                         break;
1004                 case 'z':
1005                         ctx->undo_file = optarg;
1006                         break;
1007                 default:
1008                         usage(ctx);
1009                 }
1010         if (show_version_only)
1011                 return 0;
1012         if (optind != argc - 1)
1013                 usage(ctx);
1014         if ((ctx->options & E2F_OPT_NO) &&
1015             (ctx->options & E2F_OPT_COMPRESS_DIRS)) {
1016                 com_err(ctx->program_name, 0, "%s",
1017                         _("The -n and -D options are incompatible."));
1018                 fatal_error(ctx, 0);
1019         }
1020         if ((ctx->options & E2F_OPT_NO) && cflag) {
1021                 com_err(ctx->program_name, 0, "%s",
1022                         _("The -n and -c options are incompatible."));
1023                 fatal_error(ctx, 0);
1024         }
1025         if ((ctx->options & E2F_OPT_NO) && bad_blocks_file) {
1026                 com_err(ctx->program_name, 0, "%s",
1027                         _("The -n and -l/-L options are incompatible."));
1028                 fatal_error(ctx, 0);
1029         }
1030 #ifdef HAVE_PTHREAD
1031         if (ctx->options & E2F_OPT_MULTITHREAD) {
1032                 if ((ctx->options & (E2F_OPT_YES|E2F_OPT_NO|E2F_OPT_PREEN)) == 0) {
1033                         com_err(ctx->program_name, 0, "%s",
1034                                 _("The -m option should be used together with one of -p/-y/-n options."));
1035                         fatal_error(ctx, 0);
1036                 }
1037                 if (ctx->progress) {
1038                         com_err(ctx->program_name, 0, "%s",
1039                                 _("Only one of the options -C or -m may be specified."));
1040                         fatal_error(ctx, 0);
1041                 }
1042         }
1043 #endif
1044         if (ctx->options & E2F_OPT_NO)
1045                 ctx->options |= E2F_OPT_READONLY;
1046
1047         ctx->io_options = strchr(argv[optind], '?');
1048         if (ctx->io_options)
1049                 *ctx->io_options++ = 0;
1050         ctx->filesystem_name = get_devname(ctx->blkid, argv[optind], 0);
1051         if (!ctx->filesystem_name) {
1052                 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
1053                         argv[optind]);
1054                 fatal_error(ctx, 0);
1055         }
1056         if (extended_opts)
1057                 parse_extended_opts(ctx, extended_opts);
1058
1059         /* Complain about mutually exclusive rebuilding activities */
1060         if (getenv("E2FSCK_FIXES_ONLY"))
1061                 ctx->options |= E2F_OPT_FIXES_ONLY;
1062         if ((ctx->options & E2F_OPT_COMPRESS_DIRS) &&
1063             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1064                 com_err(ctx->program_name, 0, "%s",
1065                         _("The -D and -E fixes_only options are incompatible."));
1066                 fatal_error(ctx, 0);
1067         }
1068         if ((ctx->options & E2F_OPT_CONVERT_BMAP) &&
1069             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1070                 com_err(ctx->program_name, 0, "%s",
1071                         _("The -E bmap2extent and fixes_only options are incompatible."));
1072                 fatal_error(ctx, 0);
1073         }
1074
1075         if ((cp = getenv("E2FSCK_CONFIG")) != NULL)
1076                 config_fn[0] = cp;
1077         profile_set_syntax_err_cb(syntax_err_report);
1078         profile_init(config_fn, &ctx->profile);
1079
1080         profile_get_boolean(ctx->profile, "options", "report_time", 0, 0,
1081                             &c);
1082         if (c)
1083                 ctx->options |= E2F_OPT_TIME | E2F_OPT_TIME2;
1084         profile_get_boolean(ctx->profile, "options", "report_verbose", 0, 0,
1085                             &c);
1086         if (c)
1087                 verbose = 1;
1088
1089         profile_get_boolean(ctx->profile, "options", "no_optimize_extents",
1090                             0, 0, &c);
1091         if (c)
1092                 ctx->options |= E2F_OPT_NOOPT_EXTENTS;
1093
1094         profile_get_boolean(ctx->profile, "options", "inode_count_fullmap",
1095                             0, 0, &c);
1096         if (c)
1097                 ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
1098
1099         if (ctx->readahead_kb == ~0ULL) {
1100                 profile_get_integer(ctx->profile, "options",
1101                                     "readahead_mem_pct", 0, -1, &c);
1102                 if (c >= 0 && c <= 100)
1103                         ctx->readahead_kb = phys_mem_kb * c / 100;
1104                 profile_get_integer(ctx->profile, "options",
1105                                     "readahead_kb", 0, -1, &c);
1106                 if (c >= 0)
1107                         ctx->readahead_kb = c;
1108                 if (ctx->readahead_kb != ~0ULL &&
1109                     ctx->readahead_kb > phys_mem_kb)
1110                         ctx->readahead_kb = phys_mem_kb;
1111         }
1112
1113         /* Turn off discard in read-only mode */
1114         if ((ctx->options & E2F_OPT_NO) &&
1115             (ctx->options & E2F_OPT_DISCARD))
1116                 ctx->options &= ~E2F_OPT_DISCARD;
1117
1118         if (flush) {
1119                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
1120                 if (fd < 0) {
1121                         com_err("open", errno,
1122                                 _("while opening %s for flushing"),
1123                                 ctx->filesystem_name);
1124                         fatal_error(ctx, 0);
1125                 }
1126                 if ((retval = ext2fs_sync_device(fd, 1))) {
1127                         com_err("ext2fs_sync_device", retval,
1128                                 _("while trying to flush %s"),
1129                                 ctx->filesystem_name);
1130                         fatal_error(ctx, 0);
1131                 }
1132                 close(fd);
1133         }
1134         if (cflag && bad_blocks_file) {
1135                 fprintf(stderr, "%s", _("The -c and the -l/-L options may not "
1136                                         "be both used at the same time.\n"));
1137                 exit(FSCK_USAGE);
1138         }
1139 #ifdef HAVE_SIGNAL_H
1140         /*
1141          * Set up signal action
1142          */
1143         memset(&sa, 0, sizeof(struct sigaction));
1144         sa.sa_handler = signal_cancel;
1145         sigaction(SIGINT, &sa, 0);
1146         sigaction(SIGTERM, &sa, 0);
1147 #ifdef SA_RESTART
1148         sa.sa_flags = SA_RESTART;
1149 #endif
1150         if ((ctx->options & E2F_OPT_MULTITHREAD) == 0) {
1151                 sa.sa_handler = signal_progress_on;
1152                 sigaction(SIGUSR1, &sa, 0);
1153                 sa.sa_handler = signal_progress_off;
1154                 sigaction(SIGUSR2, &sa, 0);
1155         }
1156 #endif
1157
1158         /* Update our PATH to include /sbin if we need to run badblocks  */
1159         if (cflag) {
1160                 char *oldpath = getenv("PATH");
1161                 char *newpath;
1162                 int len = sizeof(PATH_SET) + 1;
1163
1164                 if (oldpath)
1165                         len += strlen(oldpath);
1166
1167                 newpath = malloc(len);
1168                 if (!newpath)
1169                         fatal_error(ctx, "Couldn't malloc() newpath");
1170                 strcpy(newpath, PATH_SET);
1171
1172                 if (oldpath) {
1173                         strcat(newpath, ":");
1174                         strcat(newpath, oldpath);
1175                 }
1176                 putenv(newpath);
1177         }
1178 #ifdef CONFIG_JBD_DEBUG
1179         jbd_debug = getenv("E2FSCK_JBD_DEBUG");
1180         if (jbd_debug) {
1181                 res = sscanf(jbd_debug, "%d", &journal_enable_debug);
1182                 if (res != 1) {
1183                         fprintf(stderr,
1184                                 _("E2FSCK_JBD_DEBUG \"%s\" not an integer\n\n"),
1185                                 jbd_debug);
1186                         exit (1);
1187                 }
1188         }
1189 #endif
1190         return 0;
1191
1192 sscanf_err:
1193         fprintf(stderr, _("\nInvalid non-numeric argument to -%c (\"%s\")\n\n"),
1194                 c, optarg);
1195         exit (1);
1196 }
1197
1198 static errcode_t try_open_fs(e2fsck_t ctx, int flags, io_manager io_ptr,
1199                              ext2_filsys *ret_fs)
1200 {
1201         errcode_t retval;
1202
1203         *ret_fs = NULL;
1204
1205         if (ctx->superblock) {
1206                 unsigned long blocksize = ctx->blocksize;
1207
1208                 if (!blocksize) {
1209                         for (blocksize = EXT2_MIN_BLOCK_SIZE;
1210                              blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
1211
1212                                 retval = ext2fs_open2(ctx->filesystem_name,
1213                                                       ctx->io_options, flags,
1214                                                       ctx->superblock, blocksize,
1215                                                       unix_io_manager, ret_fs);
1216                                 if (*ret_fs) {
1217                                         ext2fs_free(*ret_fs);
1218                                         *ret_fs = NULL;
1219                                 }
1220                                 if (!retval)
1221                                         break;
1222                         }
1223                         if (retval)
1224                                 return retval;
1225                 }
1226
1227                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1228                                       flags, ctx->superblock, blocksize,
1229                                       io_ptr, ret_fs);
1230         } else
1231                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1232                                       flags, 0, 0, io_ptr, ret_fs);
1233
1234         if (retval == 0) {
1235                 (*ret_fs)->priv_data = ctx;
1236                 e2fsck_set_bitmap_type(*ret_fs, EXT2FS_BMAP64_RBTREE,
1237                                        "default", NULL);
1238         }
1239         return retval;
1240 }
1241
1242 static const char *my_ver_string = E2FSPROGS_VERSION;
1243 static const char *my_ver_date = E2FSPROGS_DATE;
1244
1245 static errcode_t e2fsck_check_mmp(ext2_filsys fs, e2fsck_t ctx)
1246 {
1247         struct mmp_struct *mmp_s;
1248         unsigned int mmp_check_interval;
1249         errcode_t retval = 0;
1250         struct problem_context pctx;
1251         unsigned int wait_time = 0;
1252
1253         clear_problem_context(&pctx);
1254         if (fs->mmp_buf == NULL) {
1255                 retval = ext2fs_get_mem(fs->blocksize, &fs->mmp_buf);
1256                 if (retval)
1257                         goto check_error;
1258         }
1259
1260         retval = ext2fs_mmp_read(fs, fs->super->s_mmp_block, fs->mmp_buf);
1261         if (retval)
1262                 goto check_error;
1263
1264         mmp_s = fs->mmp_buf;
1265
1266         mmp_check_interval = fs->super->s_mmp_update_interval;
1267         if (mmp_check_interval < EXT4_MMP_MIN_CHECK_INTERVAL)
1268                 mmp_check_interval = EXT4_MMP_MIN_CHECK_INTERVAL;
1269
1270         /*
1271          * If check_interval in MMP block is larger, use that instead of
1272          * check_interval from the superblock.
1273          */
1274         if (mmp_s->mmp_check_interval > mmp_check_interval)
1275                 mmp_check_interval = mmp_s->mmp_check_interval;
1276
1277         wait_time = mmp_check_interval * 2 + 1;
1278
1279         if (mmp_s->mmp_seq == EXT4_MMP_SEQ_CLEAN)
1280                 retval = 0;
1281         else if (mmp_s->mmp_seq == EXT4_MMP_SEQ_FSCK)
1282                 retval = EXT2_ET_MMP_FSCK_ON;
1283         else if (mmp_s->mmp_seq > EXT4_MMP_SEQ_MAX)
1284                 retval = EXT2_ET_MMP_UNKNOWN_SEQ;
1285
1286         if (retval)
1287                 goto check_error;
1288
1289         /* Print warning if e2fsck will wait for more than 20 secs. */
1290         if (verbose || wait_time > EXT4_MMP_MIN_CHECK_INTERVAL * 4) {
1291                 log_out(ctx, _("MMP interval is %u seconds and total wait "
1292                                "time is %u seconds. Please wait...\n"),
1293                         mmp_check_interval, wait_time * 2);
1294         }
1295
1296         return 0;
1297
1298 check_error:
1299
1300         if (retval == EXT2_ET_MMP_BAD_BLOCK) {
1301                 if (fix_problem(ctx, PR_0_MMP_INVALID_BLK, &pctx)) {
1302                         fs->super->s_mmp_block = 0;
1303                         ext2fs_mark_super_dirty(fs);
1304                         retval = 0;
1305                 }
1306         } else if (retval == EXT2_ET_MMP_FAILED) {
1307                 com_err(ctx->program_name, retval, "%s",
1308                         _("while checking MMP block"));
1309                 dump_mmp_msg(fs->mmp_buf, NULL);
1310         } else if (retval == EXT2_ET_MMP_FSCK_ON ||
1311                    retval == EXT2_ET_MMP_UNKNOWN_SEQ) {
1312                 com_err(ctx->program_name, retval, "%s",
1313                         _("while checking MMP block"));
1314                 dump_mmp_msg(fs->mmp_buf,
1315                              _("If you are sure the filesystem is not "
1316                                "in use on any node, run:\n"
1317                                "'tune2fs -f -E clear_mmp %s'\n"),
1318                              ctx->device_name);
1319         } else if (retval == EXT2_ET_MMP_MAGIC_INVALID) {
1320                 if (fix_problem(ctx, PR_0_MMP_INVALID_MAGIC, &pctx)) {
1321                         ext2fs_mmp_clear(fs);
1322                         retval = 0;
1323                 }
1324         } else if (retval == EXT2_ET_MMP_CSUM_INVALID) {
1325                 if (fix_problem(ctx, PR_0_MMP_CSUM_INVALID, &pctx)) {
1326                         ext2fs_mmp_clear(fs);
1327                         retval = 0;
1328                 }
1329         } else
1330                 com_err(ctx->program_name, retval, "%s",
1331                         _("while reading MMP block"));
1332         return retval;
1333 }
1334
1335 static int e2fsck_setup_tdb(e2fsck_t ctx, io_manager *io_ptr)
1336 {
1337         errcode_t retval = ENOMEM;
1338         char *tdb_dir = NULL, *tdb_file = NULL;
1339         char *dev_name, *tmp_name;
1340         int free_tdb_dir = 0;
1341
1342         /* (re)open a specific undo file */
1343         if (ctx->undo_file && ctx->undo_file[0] != 0) {
1344                 retval = set_undo_io_backing_manager(*io_ptr);
1345                 if (retval)
1346                         goto err;
1347                 *io_ptr = undo_io_manager;
1348                 retval = set_undo_io_backup_file(ctx->undo_file);
1349                 if (retval)
1350                         goto err;
1351                 printf(_("Overwriting existing filesystem; this can be undone "
1352                          "using the command:\n"
1353                          "    e2undo %s %s\n\n"),
1354                         ctx->undo_file, ctx->filesystem_name);
1355                 return retval;
1356         }
1357
1358         /*
1359          * Configuration via a conf file would be
1360          * nice
1361          */
1362         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
1363         if (!tdb_dir) {
1364                 profile_get_string(ctx->profile, "defaults",
1365                                    "undo_dir", 0, "/var/lib/e2fsprogs",
1366                                    &tdb_dir);
1367                 free_tdb_dir = 1;
1368         }
1369
1370         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
1371             access(tdb_dir, W_OK)) {
1372                 if (free_tdb_dir)
1373                         free(tdb_dir);
1374                 return 0;
1375         }
1376
1377         tmp_name = strdup(ctx->filesystem_name);
1378         if (!tmp_name)
1379                 goto errout;
1380         dev_name = basename(tmp_name);
1381         tdb_file = malloc(strlen(tdb_dir) + 8 + strlen(dev_name) + 7 + 1);
1382         if (!tdb_file) {
1383                 free(tmp_name);
1384                 goto errout;
1385         }
1386         sprintf(tdb_file, "%s/e2fsck-%s.e2undo", tdb_dir, dev_name);
1387         free(tmp_name);
1388
1389         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
1390                 retval = errno;
1391                 com_err(ctx->program_name, retval,
1392                         _("while trying to delete %s"), tdb_file);
1393                 goto errout;
1394         }
1395
1396         retval = set_undo_io_backing_manager(*io_ptr);
1397         if (retval)
1398                 goto errout;
1399         *io_ptr = undo_io_manager;
1400         retval = set_undo_io_backup_file(tdb_file);
1401         if (retval)
1402                 goto errout;
1403         printf(_("Overwriting existing filesystem; this can be undone "
1404                  "using the command:\n"
1405                  "    e2undo %s %s\n\n"), tdb_file, ctx->filesystem_name);
1406
1407         if (free_tdb_dir)
1408                 free(tdb_dir);
1409         free(tdb_file);
1410         return 0;
1411
1412 errout:
1413         if (free_tdb_dir)
1414                 free(tdb_dir);
1415         free(tdb_file);
1416 err:
1417         com_err(ctx->program_name, retval, "%s",
1418                 _("while trying to setup undo file\n"));
1419         return retval;
1420 }
1421
1422 int main (int argc, char *argv[])
1423 {
1424         errcode_t       retval = 0, retval2 = 0, orig_retval = 0;
1425         int             exit_value = FSCK_OK;
1426         ext2_filsys     fs = 0;
1427         io_manager      io_ptr;
1428         struct ext2_super_block *sb;
1429         const char      *lib_ver_date;
1430         int             my_ver, lib_ver;
1431         e2fsck_t        ctx;
1432         blk64_t         orig_superblock = ~(blk64_t)0;
1433         struct problem_context pctx;
1434         int flags, run_result, was_changed;
1435         int journal_size;
1436         int sysval, sys_page_size = 4096;
1437         int old_bitmaps;
1438         __u32 features[3];
1439         char *cp;
1440         enum quota_type qtype;
1441         struct ext2fs_journal_params jparams;
1442
1443         clear_problem_context(&pctx);
1444         sigcatcher_setup();
1445 #ifdef MTRACE
1446         mtrace();
1447 #endif
1448 #ifdef MCHECK
1449         mcheck(0);
1450 #endif
1451 #ifdef ENABLE_NLS
1452         setlocale(LC_MESSAGES, "");
1453         setlocale(LC_CTYPE, "");
1454         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1455         textdomain(NLS_CAT_NAME);
1456         set_com_err_gettext(gettext);
1457 #endif
1458         my_ver = ext2fs_parse_version_string(my_ver_string);
1459         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
1460         if (my_ver > lib_ver) {
1461                 fprintf( stderr, "%s",
1462                          _("Error: ext2fs library version out of date!\n"));
1463                 show_version_only++;
1464         }
1465
1466         retval = PRS(argc, argv, &ctx);
1467         if (retval) {
1468                 com_err("e2fsck", retval, "%s",
1469                         _("while trying to initialize program"));
1470                 exit(FSCK_ERROR);
1471         }
1472         reserve_stdio_fds();
1473
1474         ctx->global_ctx = NULL;
1475         set_up_logging(ctx);
1476         if (ctx->logf) {
1477                 int i;
1478
1479                 fputs("E2fsck run: ", ctx->logf);
1480                 for (i = 0; i < argc; i++) {
1481                         if (i)
1482                                 fputc(' ', ctx->logf);
1483                         fputs(argv[i], ctx->logf);
1484                 }
1485                 fputc('\n', ctx->logf);
1486         }
1487         if (ctx->problem_logf) {
1488                 int i;
1489
1490                 fputs("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n",
1491                       ctx->problem_logf);
1492                 fprintf(ctx->problem_logf, "<problem_log time=\"%lu\">\n",
1493                         (unsigned long) ctx->now);
1494                 fprintf(ctx->problem_logf, "<invocation prog=\"%s\"",
1495                         argv[0]);
1496                 for (i = 1; i < argc; i++)
1497                         fprintf(ctx->problem_logf, " arg%d=\"%s\"", i, argv[i]);
1498                 fputs("/>\n", ctx->problem_logf);
1499         }
1500
1501         init_resource_track(&ctx->global_rtrack, NULL);
1502         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
1503                 log_err(ctx, "e2fsck %s (%s)\n", my_ver_string,
1504                          my_ver_date);
1505
1506         if (show_version_only) {
1507                 log_err(ctx, _("\tUsing %s, %s\n"),
1508                         error_message(EXT2_ET_BASE), lib_ver_date);
1509                 exit(FSCK_OK);
1510         }
1511
1512         check_mount(ctx);
1513
1514         if (!(ctx->options & E2F_OPT_PREEN) &&
1515             !(ctx->options & E2F_OPT_NO) &&
1516             !(ctx->options & E2F_OPT_YES)) {
1517                 if (!ctx->interactive)
1518                         fatal_error(ctx,
1519                                     _("need terminal for interactive repairs"));
1520         }
1521         ctx->superblock = ctx->use_superblock;
1522
1523         flags = EXT2_FLAG_SKIP_MMP | EXT2_FLAG_THREADS;
1524 restart:
1525 #ifdef CONFIG_TESTIO_DEBUG
1526         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1527                 io_ptr = test_io_manager;
1528                 test_io_backing_manager = unix_io_manager;
1529         } else
1530 #endif
1531                 io_ptr = unix_io_manager;
1532         flags |= EXT2_FLAG_NOFREE_ON_ERROR;
1533         profile_get_boolean(ctx->profile, "options", "old_bitmaps", 0, 0,
1534                             &old_bitmaps);
1535         if (!old_bitmaps)
1536                 flags |= EXT2_FLAG_64BITS;
1537         if ((ctx->options & E2F_OPT_READONLY) == 0) {
1538                 flags |= EXT2_FLAG_RW;
1539                 if (!(ctx->mount_flags & EXT2_MF_ISROOT &&
1540                       ctx->mount_flags & EXT2_MF_READONLY))
1541                         flags |= EXT2_FLAG_EXCLUSIVE;
1542                 if ((ctx->mount_flags & EXT2_MF_READONLY) &&
1543                     (ctx->options & E2F_OPT_FORCE))
1544                         flags &= ~EXT2_FLAG_EXCLUSIVE;
1545         }
1546
1547         if (ctx->undo_file) {
1548                 retval = e2fsck_setup_tdb(ctx, &io_ptr);
1549                 if (retval)
1550                         exit(FSCK_ERROR);
1551         }
1552
1553         ctx->openfs_flags = flags;
1554         ctx->io_manager = io_ptr;
1555         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1556
1557         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
1558             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
1559             ((retval == EXT2_ET_BAD_MAGIC) ||
1560              (retval == EXT2_ET_SB_CSUM_INVALID) ||
1561              (retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1562              ((retval == 0) && (retval2 = ext2fs_check_desc(fs))))) {
1563                 if (retval) {
1564                         pctx.errcode = retval;
1565                         fix_problem(ctx, PR_0_OPEN_FAILED, &pctx);
1566                 }
1567                 if (retval2) {
1568                         pctx.errcode = retval2;
1569                         fix_problem(ctx, PR_0_CHECK_DESC_FAILED, &pctx);
1570                 }
1571                 pctx.errcode = 0;
1572                 if (retval2 == ENOMEM || retval2 == EXT2_ET_NO_MEMORY) {
1573                         retval = retval2;
1574                         goto failure;
1575                 }
1576                 if (fs->flags & EXT2_FLAG_NOFREE_ON_ERROR) {
1577                         ext2fs_free(fs);
1578                         fs = NULL;
1579                 }
1580                 if (!fs || (fs->group_desc_count > 1)) {
1581                         log_out(ctx, _("%s: %s trying backup blocks...\n"),
1582                                 ctx->program_name,
1583                                 retval ? _("Superblock invalid,") :
1584                                 _("Group descriptors look bad..."));
1585                         orig_superblock = ctx->superblock;
1586                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
1587                         if (fs)
1588                                 ext2fs_close_free(&fs);
1589                         orig_retval = retval;
1590                         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1591                         if ((orig_retval == 0) && retval != 0) {
1592                                 if (fs)
1593                                         ext2fs_close_free(&fs);
1594                                 log_out(ctx, _("%s: %s while using the "
1595                                                "backup blocks"),
1596                                         ctx->program_name,
1597                                         error_message(retval));
1598                                 log_out(ctx, _("%s: going back to original "
1599                                                "superblock\n"),
1600                                         ctx->program_name);
1601                                 ctx->superblock = orig_superblock;
1602                                 retval = try_open_fs(ctx, flags, io_ptr, &fs);
1603                         }
1604                 }
1605         }
1606         if (((retval == EXT2_ET_UNSUPP_FEATURE) ||
1607              (retval == EXT2_ET_RO_UNSUPP_FEATURE)) &&
1608             fs && fs->super) {
1609                 sb = fs->super;
1610                 features[0] = (sb->s_feature_compat &
1611                                ~EXT2_LIB_FEATURE_COMPAT_SUPP);
1612                 features[1] = (sb->s_feature_incompat &
1613                                ~EXT2_LIB_FEATURE_INCOMPAT_SUPP);
1614                 features[2] = (sb->s_feature_ro_compat &
1615                                ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1616                 if (features[0] || features[1] || features[2])
1617                         goto print_unsupp_features;
1618         }
1619 failure:
1620         if (retval) {
1621                 if (orig_retval)
1622                         retval = orig_retval;
1623                 com_err(ctx->program_name, retval, _("while trying to open %s"),
1624                         ctx->filesystem_name);
1625                 if (retval == EXT2_ET_REV_TOO_HIGH) {
1626                         log_out(ctx, "%s",
1627                                 _("The filesystem revision is apparently "
1628                                   "too high for this version of e2fsck.\n"
1629                                   "(Or the filesystem superblock "
1630                                   "is corrupt)\n\n"));
1631                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1632                 } else if (retval == EXT2_ET_SHORT_READ)
1633                         log_out(ctx, "%s",
1634                                 _("Could this be a zero-length partition?\n"));
1635                 else if ((retval == EPERM) || (retval == EACCES))
1636                         log_out(ctx, _("You must have %s access to the "
1637                                        "filesystem or be root\n"),
1638                                (ctx->options & E2F_OPT_READONLY) ?
1639                                "r/o" : "r/w");
1640                 else if (retval == ENXIO)
1641                         log_out(ctx, "%s",
1642                                 _("Possibly non-existent or swap device?\n"));
1643                 else if (retval == EBUSY)
1644                         log_out(ctx, "%s", _("Filesystem mounted or opened "
1645                                          "exclusively by another program?\n"));
1646                 else if (retval == ENOENT)
1647                         log_out(ctx, "%s",
1648                                 _("Possibly non-existent device?\n"));
1649 #ifdef EROFS
1650                 else if (retval == EROFS)
1651                         log_out(ctx, "%s", _("Disk write-protected; use the "
1652                                              "-n option to do a read-only\n"
1653                                              "check of the device.\n"));
1654 #endif
1655                 else {
1656                         /*
1657                          * Let's try once more will less consistency checking
1658                          * so that we are able to recover from more errors
1659                          * (e.g. some tool messing up some value in the sb).
1660                          */
1661                         if (((retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1662                              (retval == EXT2_ET_BAD_DESC_SIZE)) &&
1663                             !(flags & EXT2_FLAG_IGNORE_SB_ERRORS)) {
1664                                 if (fs)
1665                                         ext2fs_close_free(&fs);
1666                                 log_out(ctx, _("%s: Trying to load superblock "
1667                                         "despite errors...\n"),
1668                                         ctx->program_name);
1669                                 flags |= EXT2_FLAG_IGNORE_SB_ERRORS;
1670                                 /*
1671                                  * If we tried backup sb, revert to the
1672                                  * original one now.
1673                                  */
1674                                 if (orig_superblock != ~(blk64_t)0)
1675                                         ctx->superblock = orig_superblock;
1676                                 goto restart;
1677                         }
1678                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1679                         if (retval == EXT2_ET_BAD_MAGIC)
1680                                 check_plausibility(ctx->filesystem_name,
1681                                                    CHECK_FS_EXIST, NULL);
1682                 }
1683                 fatal_error(ctx, 0);
1684         }
1685         /*
1686          * We only update the master superblock because (a) paranoia;
1687          * we don't want to corrupt the backup superblocks, and (b) we
1688          * don't need to update the mount count and last checked
1689          * fields in the backup superblock (the kernel doesn't update
1690          * the backup superblocks anyway).  With newer versions of the
1691          * library this flag is set by ext2fs_open2(), but we set this
1692          * here just to be sure.  (No, we don't support e2fsck running
1693          * with some other libext2fs than the one that it was shipped
1694          * with, but just in case....)
1695          */
1696         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
1697
1698         if (!(ctx->flags & E2F_FLAG_GOT_DEVSIZE)) {
1699                 __u32 blocksize = EXT2_BLOCK_SIZE(fs->super);
1700                 int need_restart = 0;
1701
1702                 pctx.errcode = ext2fs_get_device_size2(ctx->filesystem_name,
1703                                                        blocksize,
1704                                                        &ctx->num_blocks);
1705                 /*
1706                  * The floppy driver refuses to allow anyone else to
1707                  * open the device if has been opened with O_EXCL;
1708                  * this is unlike other block device drivers in Linux.
1709                  * To handle this, we close the filesystem and then
1710                  * reopen the filesystem after we get the device size.
1711                  */
1712                 if (pctx.errcode == EBUSY) {
1713                         ext2fs_close_free(&fs);
1714                         need_restart++;
1715                         pctx.errcode =
1716                                 ext2fs_get_device_size2(ctx->filesystem_name,
1717                                                         blocksize,
1718                                                         &ctx->num_blocks);
1719                 }
1720                 if (pctx.errcode == EXT2_ET_UNIMPLEMENTED)
1721                         ctx->num_blocks = 0;
1722                 else if (pctx.errcode) {
1723                         fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
1724                         ctx->flags |= E2F_FLAG_ABORT;
1725                         fatal_error(ctx, 0);
1726                 }
1727                 ctx->flags |= E2F_FLAG_GOT_DEVSIZE;
1728                 if (need_restart)
1729                         goto restart;
1730         }
1731
1732         ctx->fs = fs;
1733         fs->now = ctx->now;
1734         sb = fs->super;
1735
1736         if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
1737                 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
1738                         _("while trying to open %s"),
1739                         ctx->filesystem_name);
1740         get_newer:
1741                 fatal_error(ctx, _("Get a newer version of e2fsck!"));
1742         }
1743
1744         /*
1745          * Set the device name, which is used whenever we print error
1746          * or informational messages to the user.
1747          */
1748         if (ctx->device_name == 0 && sb->s_volume_name[0])
1749                 ctx->device_name = string_copy(ctx, (char *) sb->s_volume_name,
1750                                                sizeof(sb->s_volume_name));
1751
1752         if (ctx->device_name == 0)
1753                 ctx->device_name = string_copy(ctx, ctx->filesystem_name, 0);
1754         for (cp = ctx->device_name; *cp; cp++)
1755                 if (isspace(*cp) || *cp == ':')
1756                         *cp = '_';
1757
1758         if (ctx->problem_logf) {
1759
1760                 fprintf(ctx->problem_logf, "<filesystem dev=\"%s\"",
1761                         ctx->filesystem_name);
1762                 if (!uuid_is_null(sb->s_uuid)) {
1763                         char buf[48];
1764
1765                         uuid_unparse(sb->s_uuid, buf);
1766                         fprintf(ctx->problem_logf, " uuid=\"%s\"", buf);
1767                 }
1768                 if (sb->s_volume_name[0])
1769                         fprintf(ctx->problem_logf, " label=\"%.*s\"",
1770                                 EXT2_LEN_STR(sb->s_volume_name));
1771
1772                 fputs("/>\n", ctx->problem_logf);
1773         }
1774
1775         ehandler_init(fs->io);
1776
1777         if (ext2fs_has_feature_mmp(fs->super) &&
1778             (flags & EXT2_FLAG_SKIP_MMP)) {
1779                 if (e2fsck_check_mmp(fs, ctx))
1780                         fatal_error(ctx, 0);
1781
1782                 /*
1783                  * Restart in order to reopen fs but this time start mmp.
1784                  */
1785                 ext2fs_close_free(&ctx->fs);
1786                 flags &= ~EXT2_FLAG_SKIP_MMP;
1787                 goto restart;
1788         }
1789
1790         if (ctx->logf)
1791                 fprintf(ctx->logf, "Filesystem UUID: %s\n",
1792                         e2p_uuid2str(sb->s_uuid));
1793
1794         /*
1795          * Make sure the ext3 superblock fields are consistent.
1796          */
1797         if ((ctx->mount_flags & (EXT2_MF_MOUNTED | EXT2_MF_BUSY)) == 0) {
1798                 retval = e2fsck_check_ext3_journal(ctx);
1799                 if (retval) {
1800                         com_err(ctx->program_name, retval,
1801                                 _("while checking journal for %s"),
1802                                 ctx->device_name);
1803                         fatal_error(ctx,
1804                                 _("Cannot proceed with file system check"));
1805                 }
1806         }
1807
1808         /*
1809          * Check to see if we need to do ext3-style recovery.  If so,
1810          * do it, and then restart the fsck.
1811          */
1812         if (ext2fs_has_feature_journal_needs_recovery(sb)) {
1813                 if (ctx->options & E2F_OPT_READONLY) {
1814                         log_out(ctx, "%s",
1815                                 _("Warning: skipping journal recovery because "
1816                                   "doing a read-only filesystem check.\n"));
1817                         io_channel_flush(ctx->fs->io);
1818                 } else {
1819                         if (ctx->flags & E2F_FLAG_RESTARTED) {
1820                                 /*
1821                                  * Whoops, we attempted to run the
1822                                  * journal twice.  This should never
1823                                  * happen, unless the hardware or
1824                                  * device driver is being bogus.
1825                                  */
1826                                 com_err(ctx->program_name, 0,
1827                                         _("unable to set superblock flags "
1828                                           "on %s\n"), ctx->device_name);
1829                                 fatal_error(ctx, 0);
1830                         }
1831                         retval = e2fsck_run_ext3_journal(ctx);
1832                         if (retval == EFSBADCRC) {
1833                                 log_out(ctx, _("Journal checksum error "
1834                                                "found in %s\n"),
1835                                         ctx->device_name);
1836                         } else if (retval == EFSCORRUPTED) {
1837                                 log_out(ctx, _("Journal corrupted in %s\n"),
1838                                         ctx->device_name);
1839                         } else if (retval) {
1840                                 com_err(ctx->program_name, retval,
1841                                 _("while recovering journal of %s"),
1842                                         ctx->device_name);
1843                         }
1844                         ext2fs_close_free(&ctx->fs);
1845                         ctx->flags |= E2F_FLAG_RESTARTED;
1846                         goto restart;
1847                 }
1848         }
1849
1850         /*
1851          * Check for compatibility with the feature sets.  We need to
1852          * be more stringent than ext2fs_open().
1853          */
1854         features[0] = sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP;
1855         features[1] = sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP;
1856         features[2] = (sb->s_feature_ro_compat &
1857                        ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1858 print_unsupp_features:
1859         if (features[0] || features[1] || features[2]) {
1860                 int     i, j;
1861                 __u32   *mask = features, m;
1862
1863                 log_err(ctx, _("%s has unsupported feature(s):"),
1864                         ctx->filesystem_name);
1865
1866                 for (i=0; i <3; i++,mask++) {
1867                         for (j=0,m=1; j < 32; j++, m<<=1) {
1868                                 if (*mask & m)
1869                                         log_err(ctx, " %s",
1870                                                 e2p_feature2string(i, m));
1871                         }
1872                 }
1873                 log_err(ctx, "\n");
1874                 goto get_newer;
1875         }
1876
1877         if (ext2fs_has_feature_casefold(sb) && !fs->encoding) {
1878                 log_err(ctx, _("%s has unsupported encoding: %0x\n"),
1879                         ctx->filesystem_name, sb->s_encoding);
1880                 goto get_newer;
1881         }
1882
1883         /*
1884          * If the user specified a specific superblock, presumably the
1885          * master superblock has been trashed.  So we mark the
1886          * superblock as dirty, so it can be written out.
1887          */
1888         if (ctx->superblock &&
1889             !(ctx->options & E2F_OPT_READONLY))
1890                 ext2fs_mark_super_dirty(fs);
1891
1892         /*
1893          * Calculate the number of filesystem blocks per pagesize.  If
1894          * fs->blocksize > page_size, set the number of blocks per
1895          * pagesize to 1 to avoid division by zero errors.
1896          */
1897 #ifdef _SC_PAGESIZE
1898         sysval = sysconf(_SC_PAGESIZE);
1899         if (sysval > 0)
1900                 sys_page_size = sysval;
1901 #endif /* _SC_PAGESIZE */
1902         ctx->blocks_per_page = sys_page_size / fs->blocksize;
1903         if (ctx->blocks_per_page == 0)
1904                 ctx->blocks_per_page = 1;
1905
1906         if (ctx->superblock)
1907                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
1908         ext2fs_mark_valid(fs);
1909         check_super_block(ctx);
1910         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1911                 fatal_error(ctx, 0);
1912         check_if_skip(ctx);
1913         check_resize_inode(ctx);
1914         if (bad_blocks_file)
1915                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
1916         else if (cflag)
1917                 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
1918         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1919                 fatal_error(ctx, 0);
1920
1921         /*
1922          * Mark the system as valid, 'til proven otherwise
1923          */
1924         ext2fs_mark_valid(fs);
1925
1926         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
1927         if (retval) {
1928                 log_out(ctx, _("%s: %s while reading bad blocks inode\n"),
1929                         ctx->program_name, error_message(retval));
1930                 preenhalt(ctx);
1931                 log_out(ctx, "%s", _("This doesn't bode well, "
1932                                      "but we'll try to go on...\n"));
1933         }
1934
1935         /*
1936          * Save the journal size in megabytes.
1937          * Try and use the journal size from the backup else let e2fsck
1938          * find the default journal size. If fast commit feature is enabled,
1939          * it is not clear how many of the journal blocks were fast commit
1940          * blocks. So, ignore the size of journal found in backup.
1941          *
1942          * TODO: Add a new backup type that captures fast commit info as
1943          * well.
1944          */
1945         if (sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS &&
1946                 !ext2fs_has_feature_fast_commit(sb))
1947                 journal_size = (sb->s_jnl_blocks[15] << (32 - 20)) |
1948                                (sb->s_jnl_blocks[16] >> 20);
1949         else
1950                 journal_size = -1;
1951
1952         if (ext2fs_has_feature_quota(sb)) {
1953                 /* Quotas were enabled. Do quota accounting during fsck. */
1954                 clear_problem_context(&pctx);
1955                 pctx.errcode = quota_init_context(&ctx->qctx, ctx->fs, 0);
1956                 if (pctx.errcode) {
1957                         fix_problem(ctx, PR_0_QUOTA_INIT_CTX, &pctx);
1958                         fatal_error(ctx, 0);
1959                 }
1960         }
1961
1962         run_result = e2fsck_run(ctx);
1963         e2fsck_clear_progbar(ctx);
1964
1965         if (!ctx->invalid_bitmaps &&
1966             (ctx->flags & E2F_FLAG_JOURNAL_INODE)) {
1967                 if (fix_problem(ctx, PR_6_RECREATE_JOURNAL, &pctx)) {
1968                         if (journal_size < 1024) {
1969                                 ext2fs_get_journal_params(&jparams, fs);
1970                         } else {
1971                                 jparams.num_journal_blocks = journal_size;
1972                                 jparams.num_fc_blocks = 0;
1973                         }
1974                         log_out(ctx, _("Creating journal (%d blocks): "),
1975                                jparams.num_journal_blocks);
1976                         fflush(stdout);
1977                         retval = ext2fs_add_journal_inode3(fs, &jparams, ~0ULL, 0);
1978                         if (retval) {
1979                                 log_out(ctx, "%s: while trying to create "
1980                                         "journal\n", error_message(retval));
1981                                 goto no_journal;
1982                         }
1983                         log_out(ctx, "%s", _(" Done.\n"));
1984                         log_out(ctx, "%s",
1985                                 _("\n*** journal has been regenerated ***\n"));
1986                 }
1987         }
1988 no_journal:
1989
1990         if (run_result & E2F_FLAG_ABORT) {
1991                 fatal_error(ctx, _("aborted"));
1992         } else if (run_result & E2F_FLAG_CANCEL) {
1993                 log_out(ctx, _("%s: e2fsck canceled.\n"), ctx->device_name ?
1994                         ctx->device_name : ctx->filesystem_name);
1995                 exit_value |= FSCK_CANCELED;
1996         } else if (ctx->qctx && !ctx->invalid_bitmaps) {
1997                 int needs_writeout;
1998
1999                 for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
2000                         if (*quota_sb_inump(sb, qtype) == 0)
2001                                 continue;
2002                         needs_writeout = 0;
2003                         pctx.num = qtype;
2004                         retval = quota_compare_and_update(ctx->qctx, qtype,
2005                                                           &needs_writeout);
2006                         if ((retval || needs_writeout) &&
2007                             fix_problem(ctx, PR_6_UPDATE_QUOTAS, &pctx)) {
2008                                 pctx.errcode = quota_write_inode(ctx->qctx,
2009                                                                  1 << qtype);
2010                                 if (pctx.errcode)
2011                                         (void) fix_problem(ctx,
2012                                                 PR_6_WRITE_QUOTAS, &pctx);
2013                         }
2014                 }
2015                 quota_release_context(&ctx->qctx);
2016         }
2017
2018         if (run_result == E2F_FLAG_RESTART) {
2019                 log_out(ctx, "%s",
2020                         _("Restarting e2fsck from the beginning...\n"));
2021                 retval = e2fsck_reset_context(ctx);
2022                 if (retval) {
2023                         com_err(ctx->program_name, retval, "%s",
2024                                 _("while resetting context"));
2025                         fatal_error(ctx, 0);
2026                 }
2027                 ext2fs_close_free(&ctx->fs);
2028                 goto restart;
2029         }
2030
2031 #ifdef MTRACE
2032         mtrace_print("Cleanup");
2033 #endif
2034         was_changed = ext2fs_test_changed(fs);
2035         if (!(ctx->flags & E2F_FLAG_RUN_RETURN) &&
2036             !(ctx->options & E2F_OPT_READONLY)) {
2037                 if (ext2fs_test_valid(fs)) {
2038                         if (!(sb->s_state & EXT2_VALID_FS))
2039                                 exit_value |= FSCK_NONDESTRUCT;
2040                         sb->s_state = EXT2_VALID_FS;
2041                         if (check_backup_super_block(ctx))
2042                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2043                 } else
2044                         sb->s_state &= ~EXT2_VALID_FS;
2045                 if (!(ctx->flags & E2F_FLAG_TIME_INSANE))
2046                         sb->s_lastcheck = ctx->now;
2047                 sb->s_mnt_count = 0;
2048                 memset(((char *) sb) + EXT4_S_ERR_START, 0, EXT4_S_ERR_LEN);
2049                 pctx.errcode = ext2fs_set_gdt_csum(ctx->fs);
2050                 if (pctx.errcode)
2051                         fix_problem(ctx, PR_6_SET_BG_CHECKSUM, &pctx);
2052                 ext2fs_mark_super_dirty(fs);
2053         }
2054
2055         if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2056             (ctx->options & E2F_OPT_UNSHARE_BLOCKS) &&
2057             (ctx->options & E2F_OPT_NO))
2058                 /* Don't try to write or flush I/O, we just wanted to know whether or
2059                  * not there were enough free blocks to undo deduplication.
2060                  */
2061                 goto skip_write;
2062
2063         if (!(ctx->options & E2F_OPT_READONLY)) {
2064                 e2fsck_write_bitmaps(ctx);
2065                 if (fs->flags & EXT2_FLAG_DIRTY) {
2066                         pctx.errcode = ext2fs_flush(ctx->fs);
2067                         if (pctx.errcode)
2068                                 fix_problem(ctx, PR_6_FLUSH_FILESYSTEM, &pctx);
2069                 }
2070                 pctx.errcode = io_channel_flush(ctx->fs->io);
2071                 if (pctx.errcode)
2072                         fix_problem(ctx, PR_6_IO_FLUSH, &pctx);
2073         }
2074
2075         if (was_changed) {
2076                 int fs_fixed = (ctx->flags & E2F_FLAG_PROBLEMS_FIXED);
2077
2078                 if (fs_fixed)
2079                         exit_value |= FSCK_NONDESTRUCT;
2080                 if (!(ctx->options & E2F_OPT_PREEN)) {
2081 #if 0   /* Do this later; it breaks too many tests' golden outputs */
2082                         log_out(ctx, fs_fixed ?
2083                                 _("\n%s: ***** FILE SYSTEM ERRORS "
2084                                   "CORRECTED *****\n") :
2085                                 _("%s: File system was modified.\n"),
2086                                 ctx->device_name);
2087 #else
2088                         log_out(ctx,
2089                                 _("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
2090                                 ctx->device_name);
2091 #endif
2092                 }
2093                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
2094                         log_out(ctx, _("%s: ***** REBOOT SYSTEM *****\n"),
2095                                 ctx->device_name);
2096                         exit_value |= FSCK_REBOOT;
2097                 }
2098         }
2099
2100 skip_write:
2101         if (!ext2fs_test_valid(fs) ||
2102             ((exit_value & FSCK_CANCELED) &&
2103              (sb->s_state & EXT2_ERROR_FS))) {
2104                 log_out(ctx, _("\n%s: ********** WARNING: Filesystem still has "
2105                                "errors **********\n\n"), ctx->device_name);
2106                 exit_value |= FSCK_UNCORRECTED;
2107                 exit_value &= ~FSCK_NONDESTRUCT;
2108         }
2109         if (exit_value & FSCK_CANCELED) {
2110                 int     allow_cancellation;
2111
2112                 profile_get_boolean(ctx->profile, "options",
2113                                     "allow_cancellation", 0, 0,
2114                                     &allow_cancellation);
2115                 exit_value &= ~FSCK_NONDESTRUCT;
2116                 if (allow_cancellation && ext2fs_test_valid(fs) &&
2117                     (sb->s_state & EXT2_VALID_FS) &&
2118                     !(sb->s_state & EXT2_ERROR_FS))
2119                         exit_value = 0;
2120         } else
2121                 show_stats(ctx);
2122
2123         print_resource_track(ctx, NULL, &ctx->global_rtrack, ctx->fs->io);
2124
2125         ext2fs_close_free(&ctx->fs);
2126         free(ctx->journal_name);
2127
2128         if (ctx->logf)
2129                 fprintf(ctx->logf, "Exit status: %d\n", exit_value);
2130         e2fsck_free_context(ctx);
2131         remove_error_table(&et_ext2_error_table);
2132         remove_error_table(&et_prof_error_table);
2133         return exit_value;
2134 }