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 "support/plausible.h"
  54 #include "e2fsck.h"
  55 #include "problem.h"
  56 #include "jfs_user.h"
  57 #include "../version.h"
  58
  59 /* Command line options */
  60 static int cflag;               /* check disk */
  61 static int show_version_only;
  62 static int verbose;
  63
  64 static int replace_bad_blocks;
  65 static int keep_bad_blocks;
  66 static char *bad_blocks_file;
  67
  68 e2fsck_t e2fsck_global_ctx;     /* Try your very best not to use this! */
  69
  70 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jbd-debug */
  71 int journal_enable_debug = -1;
  72 #endif
  73
  74 static void usage(e2fsck_t ctx)
  75 {
  76         fprintf(stderr,
  77                 _("Usage: %s [-panyrcdfktvDFV] [-b superblock] [-B blocksize]\n"
  78                 "\t\t[-l|-L bad_blocks_file] [-C fd] [-j external_journal]\n"
  79                 "\t\t[-E extended-options] [-z undo_file] device\n"),
  80                 ctx->program_name);
  81
  82         fprintf(stderr, "%s", _("\nEmergency help:\n"
  83                 " -p                   Automatic repair (no questions)\n"
  84                 " -n                   Make no changes to the filesystem\n"
  85                 " -y                   Assume \"yes\" to all questions\n"
  86                 " -c                   Check for bad blocks and add them to the badblock list\n"
  87                 " -f                   Force checking even if filesystem is marked clean\n"));
  88         fprintf(stderr, "%s", _(""
  89                 " -v                   Be verbose\n"
  90                 " -b superblock        Use alternative superblock\n"
  91                 " -B blocksize         Force blocksize when looking for superblock\n"
  92                 " -j external_journal  Set location of the external journal\n"
  93                 " -l bad_blocks_file   Add to badblocks list\n"
  94                 " -L bad_blocks_file   Set badblocks list\n"
  95                 " -z undo_file         Create an undo file\n"
  96                 ));
  97
  98         exit(FSCK_USAGE);
  99 }
 100
 101 static void show_stats(e2fsck_t ctx)
 102 {
 103         ext2_filsys fs = ctx->fs;
 104         ext2_ino_t inodes, inodes_used;
 105         blk64_t blocks, blocks_used;
 106         unsigned int dir_links;
 107         unsigned int num_files, num_links;
 108         __u32 *mask, m;
 109         int frag_percent_file = 0, frag_percent_dir = 0, frag_percent_total = 0;
 110         int i, j, printed = 0;
 111
 112         dir_links = 2 * ctx->fs_directory_count - 1;
 113         num_files = ctx->fs_total_count - dir_links;
 114         num_links = ctx->fs_links_count - dir_links;
 115         inodes = fs->super->s_inodes_count;
 116         inodes_used = (fs->super->s_inodes_count -
 117                        fs->super->s_free_inodes_count);
 118         blocks = ext2fs_blocks_count(fs->super);
 119         blocks_used = (ext2fs_blocks_count(fs->super) -
 120                        ext2fs_free_blocks_count(fs->super));
 121
 122         if (inodes_used > 0) {
 123                 frag_percent_file = (10000 * ctx->fs_fragmented) / inodes_used;
 124                 frag_percent_file = (frag_percent_file + 5) / 10;
 125
 126                 frag_percent_dir = (10000 * ctx->fs_fragmented_dir) / inodes_used;
 127                 frag_percent_dir = (frag_percent_dir + 5) / 10;
 128
 129                 frag_percent_total = ((10000 * (ctx->fs_fragmented +
 130                                                 ctx->fs_fragmented_dir))
 131                                       / inodes_used);
 132                 frag_percent_total = (frag_percent_total + 5) / 10;
 133         }
 134
 135         if (!verbose) {
 136                 log_out(ctx, _("%s: %u/%u files (%0d.%d%% non-contiguous), "
 137                                "%llu/%llu blocks\n"),
 138                         ctx->device_name, inodes_used, inodes,
 139                         frag_percent_total / 10, frag_percent_total % 10,
 140                         blocks_used, blocks);
 141                 return;
 142         }
 143         profile_get_boolean(ctx->profile, "options", "report_features", 0, 0,
 144                             &i);
 145         if (verbose && i) {
 146                 log_out(ctx, "\nFilesystem features:");
 147                 mask = &ctx->fs->super->s_feature_compat;
 148                 for (i = 0; i < 3; i++, mask++) {
 149                         for (j = 0, m = 1; j < 32; j++, m <<= 1) {
 150                                 if (*mask & m) {
 151                                         log_out(ctx, " %s",
 152                                                 e2p_feature2string(i, m));
 153                                         printed++;
 154                                 }
 155                         }
 156                 }
 157                 if (printed == 0)
 158                         log_out(ctx, " (none)");
 159                 log_out(ctx, "\n");
 160         }
 161
 162         log_out(ctx, P_("\n%12u inode used (%2.2f%%, out of %u)\n",
 163                         "\n%12u inodes used (%2.2f%%, out of %u)\n",
 164                         inodes_used), inodes_used,
 165                 100.0 * inodes_used / inodes, inodes);
 166         log_out(ctx, P_("%12u non-contiguous file (%0d.%d%%)\n",
 167                         "%12u non-contiguous files (%0d.%d%%)\n",
 168                         ctx->fs_fragmented),
 169                 ctx->fs_fragmented, frag_percent_file / 10,
 170                 frag_percent_file % 10);
 171         log_out(ctx, P_("%12u non-contiguous directory (%0d.%d%%)\n",
 172                         "%12u non-contiguous directories (%0d.%d%%)\n",
 173                         ctx->fs_fragmented_dir),
 174                 ctx->fs_fragmented_dir, frag_percent_dir / 10,
 175                 frag_percent_dir % 10);
 176         log_out(ctx, _("             # of inodes with ind/dind/tind blocks: "
 177                        "%u/%u/%u\n"),
 178                 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
 179
 180         for (j=MAX_EXTENT_DEPTH_COUNT-1; j >=0; j--)
 181                 if (ctx->extent_depth_count[j])
 182                         break;
 183         if (++j) {
 184                 log_out(ctx, "%s", _("             Extent depth histogram: "));
 185                 for (i=0; i < j; i++) {
 186                         if (i)
 187                                 fputc('/', stdout);
 188                         log_out(ctx, "%u", ctx->extent_depth_count[i]);
 189                 }
 190                 log_out(ctx, "\n");
 191         }
 192
 193         log_out(ctx, P_("%12llu block used (%2.2f%%, out of %llu)\n",
 194                         "%12llu blocks used (%2.2f%%, out of %llu)\n",
 195                    blocks_used),
 196                 blocks_used, 100.0 * blocks_used / blocks, blocks);
 197         log_out(ctx, P_("%12u bad block\n", "%12u bad blocks\n",
 198                         ctx->fs_badblocks_count), ctx->fs_badblocks_count);
 199         log_out(ctx, P_("%12u large file\n", "%12u large files\n",
 200                         ctx->large_files), ctx->large_files);
 201         log_out(ctx, P_("\n%12u regular file\n", "\n%12u regular files\n",
 202                         ctx->fs_regular_count), ctx->fs_regular_count);
 203         log_out(ctx, P_("%12u directory\n", "%12u directories\n",
 204                         ctx->fs_directory_count), ctx->fs_directory_count);
 205         log_out(ctx, P_("%12u character device file\n",
 206                         "%12u character device files\n", ctx->fs_chardev_count),
 207                 ctx->fs_chardev_count);
 208         log_out(ctx, P_("%12u block device file\n", "%12u block device files\n",
 209                         ctx->fs_blockdev_count), ctx->fs_blockdev_count);
 210         log_out(ctx, P_("%12u fifo\n", "%12u fifos\n", ctx->fs_fifo_count),
 211                 ctx->fs_fifo_count);
 212         log_out(ctx, P_("%12u link\n", "%12u links\n", num_links),
 213                 ctx->fs_links_count - dir_links);
 214         log_out(ctx, P_("%12u symbolic link", "%12u symbolic links",
 215                         ctx->fs_symlinks_count), ctx->fs_symlinks_count);
 216         log_out(ctx, P_(" (%u fast symbolic link)\n",
 217                         " (%u fast symbolic links)\n",
 218                         ctx->fs_fast_symlinks_count),
 219                 ctx->fs_fast_symlinks_count);
 220         log_out(ctx, P_("%12u socket\n", "%12u sockets\n",
 221                         ctx->fs_sockets_count),
 222                 ctx->fs_sockets_count);
 223         log_out(ctx, "------------\n");
 224         log_out(ctx, P_("%12u file\n", "%12u files\n", num_files),
 225                 num_files);
 226 }
 227
 228 static void check_mount(e2fsck_t ctx)
 229 {
 230         errcode_t       retval;
 231         int             cont;
 232
 233         retval = ext2fs_check_if_mounted(ctx->filesystem_name,
 234                                          &ctx->mount_flags);
 235         if (retval) {
 236                 com_err("ext2fs_check_if_mount", retval,
 237                         _("while determining whether %s is mounted."),
 238                         ctx->filesystem_name);
 239                 return;
 240         }
 241
 242         /*
 243          * If the filesystem isn't mounted, or it's the root
 244          * filesystem and it's mounted read-only, and we're not doing
 245          * a read/write check, then everything's fine.
 246          */
 247         if ((!(ctx->mount_flags & (EXT2_MF_MOUNTED | EXT2_MF_BUSY))) ||
 248             ((ctx->mount_flags & EXT2_MF_ISROOT) &&
 249              (ctx->mount_flags & EXT2_MF_READONLY) &&
 250              !(ctx->options & E2F_OPT_WRITECHECK)))
 251                 return;
 252
 253         if (((ctx->options & E2F_OPT_READONLY) ||
 254              ((ctx->options & E2F_OPT_FORCE) &&
 255               (ctx->mount_flags & EXT2_MF_READONLY))) &&
 256             !(ctx->options & E2F_OPT_WRITECHECK)) {
 257                 if (ctx->mount_flags & EXT2_MF_MOUNTED)
 258                         log_out(ctx, _("Warning!  %s is mounted.\n"),
 259                                         ctx->filesystem_name);
 260                 else
 261                         log_out(ctx, _("Warning!  %s is in use.\n"),
 262                                         ctx->filesystem_name);
 263                 return;
 264         }
 265
 266         if (ctx->mount_flags & EXT2_MF_MOUNTED)
 267                 log_out(ctx, _("%s is mounted.\n"), ctx->filesystem_name);
 268         else
 269                 log_out(ctx, _("%s is in use.\n"), ctx->filesystem_name);
 270         if (!ctx->interactive || ctx->mount_flags & EXT2_MF_BUSY)
 271                 fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
 272         puts("\007\007\007\007");
 273         log_out(ctx, "%s", _("\n\nWARNING!!!  "
 274                        "The filesystem is mounted.   "
 275                        "If you continue you ***WILL***\n"
 276                        "cause ***SEVERE*** filesystem damage.\n\n"));
 277         puts("\007\007\007");
 278         cont = ask_yn(ctx, _("Do you really want to continue"), 0);
 279         if (!cont) {
 280                 printf("%s", _("check aborted.\n"));
 281                 exit (0);
 282         }
 283         return;
 284 }
 285
 286 static int is_on_batt(void)
 287 {
 288         FILE    *f;
 289         DIR     *d;
 290         char    tmp[80], tmp2[80], fname[NAME_MAX+30];
 291         unsigned int    acflag;
 292         struct dirent*  de;
 293
 294         f = fopen("/sys/class/power_supply/AC/online", "r");
 295         if (f) {
 296                 if (fscanf(f, "%u\n", &acflag) == 1) {
 297                         fclose(f);
 298                         return (!acflag);
 299                 }
 300                 fclose(f);
 301         }
 302         f = fopen("/proc/apm", "r");
 303         if (f) {
 304                 if (fscanf(f, "%s %s %s %x", tmp, tmp, tmp, &acflag) != 4)
 305                         acflag = 1;
 306                 fclose(f);
 307                 return (acflag != 1);
 308         }
 309         d = opendir("/proc/acpi/ac_adapter");
 310         if (d) {
 311                 while ((de=readdir(d)) != NULL) {
 312                         if (!strncmp(".", de->d_name, 1))
 313                                 continue;
 314                         snprintf(fname, sizeof(fname),
 315                                  "/proc/acpi/ac_adapter/%s/state",
 316                                  de->d_name);
 317                         f = fopen(fname, "r");
 318                         if (!f)
 319                                 continue;
 320                         if (fscanf(f, "%s %s", tmp2, tmp) != 2)
 321                                 tmp[0] = 0;
 322                         fclose(f);
 323                         if (strncmp(tmp, "off-line", 8) == 0) {
 324                                 closedir(d);
 325                                 return 1;
 326                         }
 327                 }
 328                 closedir(d);
 329         }
 330         return 0;
 331 }
 332
 333 /*
 334  * This routine checks to see if a filesystem can be skipped; if so,
 335  * it will exit with E2FSCK_OK.  Under some conditions it will print a
 336  * message explaining why a check is being forced.
 337  */
 338 static void check_if_skip(e2fsck_t ctx)
 339 {
 340         ext2_filsys fs = ctx->fs;
 341         struct problem_context pctx;
 342         const char *reason = NULL;
 343         unsigned int reason_arg = 0;
 344         long next_check;
 345         int batt = is_on_batt();
 346         int defer_check_on_battery;
 347         int broken_system_clock;
 348         time_t lastcheck;
 349
 350         if (ctx->flags & E2F_FLAG_PROBLEMS_FIXED)
 351                 return;
 352
 353         profile_get_boolean(ctx->profile, "options", "broken_system_clock",
 354                             0, 0, &broken_system_clock);
 355         if (ctx->flags & E2F_FLAG_TIME_INSANE)
 356                 broken_system_clock = 1;
 357         profile_get_boolean(ctx->profile, "options",
 358                             "defer_check_on_battery", 0, 1,
 359                             &defer_check_on_battery);
 360         if (!defer_check_on_battery)
 361                 batt = 0;
 362
 363         if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file || cflag)
 364                 return;
 365
 366         if (ctx->options & E2F_OPT_JOURNAL_ONLY)
 367                 goto skip;
 368
 369         lastcheck = fs->super->s_lastcheck;
 370         if (lastcheck > ctx->now)
 371                 lastcheck -= ctx->time_fudge;
 372         if ((fs->super->s_state & EXT2_ERROR_FS) ||
 373             !ext2fs_test_valid(fs))
 374                 reason = _(" contains a file system with errors");
 375         else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
 376                 reason = _(" was not cleanly unmounted");
 377         else if (check_backup_super_block(ctx))
 378                 reason = _(" primary superblock features different from backup");
 379         else if ((fs->super->s_max_mnt_count > 0) &&
 380                  (fs->super->s_mnt_count >=
 381                   (unsigned) fs->super->s_max_mnt_count)) {
 382                 reason = _(" has been mounted %u times without being checked");
 383                 reason_arg = fs->super->s_mnt_count;
 384                 if (batt && (fs->super->s_mnt_count <
 385                              (unsigned) fs->super->s_max_mnt_count*2))
 386                         reason = 0;
 387         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 388                    (ctx->now < lastcheck)) {
 389                 reason = _(" has filesystem last checked time in the future");
 390                 if (batt)
 391                         reason = 0;
 392         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 393                    ((ctx->now - lastcheck) >=
 394                     ((time_t) fs->super->s_checkinterval))) {
 395                 reason = _(" has gone %u days without being checked");
 396                 reason_arg = (ctx->now - fs->super->s_lastcheck)/(3600*24);
 397                 if (batt && ((ctx->now - fs->super->s_lastcheck) <
 398                              fs->super->s_checkinterval*2))
 399                         reason = 0;
 400         } else if (broken_system_clock && fs->super->s_checkinterval) {
 401                 log_out(ctx, "%s: ", ctx->device_name);
 402                 log_out(ctx, "%s",
 403                         _("ignoring check interval, broken_system_clock set\n"));
 404         }
 405
 406         if (reason) {
 407                 log_out(ctx, "%s", ctx->device_name);
 408                 log_out(ctx, reason, reason_arg);
 409                 log_out(ctx, "%s", _(", check forced.\n"));
 410                 return;
 411         }
 412
 413         /*
 414          * Update the global counts from the block group counts.  This
 415          * is needed since modern kernels don't update the global
 416          * counts so as to avoid locking the entire file system.  So
 417          * if the filesystem is not unmounted cleanly, the global
 418          * counts may not be accurate.  Update them here if we can,
 419          * for the benefit of users who might examine the file system
 420          * using dumpe2fs.  (This is for cosmetic reasons only.)
 421          */
 422         clear_problem_context(&pctx);
 423         pctx.ino = fs->super->s_free_inodes_count;
 424         pctx.ino2 = ctx->free_inodes;
 425         if ((pctx.ino != pctx.ino2) &&
 426             !(ctx->options & E2F_OPT_READONLY) &&
 427             fix_problem(ctx, PR_0_FREE_INODE_COUNT, &pctx)) {
 428                 fs->super->s_free_inodes_count = ctx->free_inodes;
 429                 ext2fs_mark_super_dirty(fs);
 430         }
 431         clear_problem_context(&pctx);
 432         pctx.blk = ext2fs_free_blocks_count(fs->super);
 433         pctx.blk2 = ctx->free_blocks;
 434         if ((pctx.blk != pctx.blk2) &&
 435             !(ctx->options & E2F_OPT_READONLY) &&
 436             fix_problem(ctx, PR_0_FREE_BLOCK_COUNT, &pctx)) {
 437                 ext2fs_free_blocks_count_set(fs->super, ctx->free_blocks);
 438                 ext2fs_mark_super_dirty(fs);
 439         }
 440
 441         /* Print the summary message when we're skipping a full check */
 442         log_out(ctx, _("%s: clean, %u/%u files, %llu/%llu blocks"),
 443                 ctx->device_name,
 444                 fs->super->s_inodes_count - fs->super->s_free_inodes_count,
 445                 fs->super->s_inodes_count,
 446                 ext2fs_blocks_count(fs->super) -
 447                 ext2fs_free_blocks_count(fs->super),
 448                 ext2fs_blocks_count(fs->super));
 449         next_check = 100000;
 450         if (fs->super->s_max_mnt_count > 0) {
 451                 next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count;
 452                 if (next_check <= 0)
 453                         next_check = 1;
 454         }
 455         if (!broken_system_clock && fs->super->s_checkinterval &&
 456             ((ctx->now - fs->super->s_lastcheck) >= fs->super->s_checkinterval))
 457                 next_check = 1;
 458         if (next_check <= 5) {
 459                 if (next_check == 1) {
 460                         if (batt)
 461                                 log_out(ctx, "%s",
 462                                         _(" (check deferred; on battery)"));
 463                         else
 464                                 log_out(ctx, "%s",
 465                                         _(" (check after next mount)"));
 466                 } else
 467                         log_out(ctx, _(" (check in %ld mounts)"),
 468                                 next_check);
 469         }
 470         log_out(ctx, "\n");
 471 skip:
 472         ext2fs_close_free(&ctx->fs);
 473         e2fsck_free_context(ctx);
 474         exit(FSCK_OK);
 475 }
 476
 477 /*
 478  * For completion notice
 479  */
 480 struct percent_tbl {
 481         int     max_pass;
 482         int     table[32];
 483 };
 484 static struct percent_tbl e2fsck_tbl = {
 485         5, { 0, 70, 90, 92,  95, 100 }
 486 };
 487 static char bar[128], spaces[128];
 488
 489 static float calc_percent(struct percent_tbl *tbl, int pass, int curr,
 490                           int max)
 491 {
 492         float   percent;
 493
 494         if (pass <= 0)
 495                 return 0.0;
 496         if (pass > tbl->max_pass || max == 0)
 497                 return 100.0;
 498         percent = ((float) curr) / ((float) max);
 499         return ((percent * (tbl->table[pass] - tbl->table[pass-1]))
 500                 + tbl->table[pass-1]);
 501 }
 502
 503 void e2fsck_clear_progbar(e2fsck_t ctx)
 504 {
 505         if (!(ctx->flags & E2F_FLAG_PROG_BAR))
 506                 return;
 507
 508         printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80),
 509                ctx->stop_meta);
 510         fflush(stdout);
 511         ctx->flags &= ~E2F_FLAG_PROG_BAR;
 512 }
 513
 514 int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent,
 515                            unsigned int dpynum)
 516 {
 517         static const char spinner[] = "\\|/-";
 518         int     i;
 519         unsigned int    tick;
 520         struct timeval  tv;
 521         int dpywidth;
 522         int fixed_percent;
 523
 524         if (ctx->flags & E2F_FLAG_PROG_SUPPRESS)
 525                 return 0;
 526
 527         /*
 528          * Calculate the new progress position.  If the
 529          * percentage hasn't changed, then we skip out right
 530          * away.
 531          */
 532         fixed_percent = (int) ((10 * percent) + 0.5);
 533         if (ctx->progress_last_percent == fixed_percent)
 534                 return 0;
 535         ctx->progress_last_percent = fixed_percent;
 536
 537         /*
 538          * If we've already updated the spinner once within
 539          * the last 1/8th of a second, no point doing it
 540          * again.
 541          */
 542         gettimeofday(&tv, NULL);
 543         tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8));
 544         if ((tick == ctx->progress_last_time) &&
 545             (fixed_percent != 0) && (fixed_percent != 1000))
 546                 return 0;
 547         ctx->progress_last_time = tick;
 548
 549         /*
 550          * Advance the spinner, and note that the progress bar
 551          * will be on the screen
 552          */
 553         ctx->progress_pos = (ctx->progress_pos+1) & 3;
 554         ctx->flags |= E2F_FLAG_PROG_BAR;
 555
 556         dpywidth = 66 - strlen(label);
 557         dpywidth = 8 * (dpywidth / 8);
 558         if (dpynum)
 559                 dpywidth -= 8;
 560
 561         i = ((percent * dpywidth) + 50) / 100;
 562         printf("%s%s: |%s%s", ctx->start_meta, label,
 563                bar + (sizeof(bar) - (i+1)),
 564                spaces + (sizeof(spaces) - (dpywidth - i + 1)));
 565         if (fixed_percent == 1000)
 566                 fputc('|', stdout);
 567         else
 568                 fputc(spinner[ctx->progress_pos & 3], stdout);
 569         printf(" %4.1f%%  ", percent);
 570         if (dpynum)
 571                 printf("%u\r", dpynum);
 572         else
 573                 fputs(" \r", stdout);
 574         fputs(ctx->stop_meta, stdout);
 575
 576         if (fixed_percent == 1000)
 577                 e2fsck_clear_progbar(ctx);
 578         fflush(stdout);
 579
 580         return 0;
 581 }
 582
 583 static int e2fsck_update_progress(e2fsck_t ctx, int pass,
 584                                   unsigned long cur, unsigned long max)
 585 {
 586         char buf[1024];
 587         float percent;
 588
 589         if (pass == 0)
 590                 return 0;
 591
 592         if (ctx->progress_fd) {
 593                 snprintf(buf, sizeof(buf), "%d %lu %lu %s\n",
 594                          pass, cur, max, ctx->device_name);
 595                 write_all(ctx->progress_fd, buf, strlen(buf));
 596         } else {
 597                 percent = calc_percent(&e2fsck_tbl, pass, cur, max);
 598                 e2fsck_simple_progress(ctx, ctx->device_name,
 599                                        percent, 0);
 600         }
 601         return 0;
 602 }
 603
 604 #define PATH_SET "PATH=/sbin"
 605
 606 /*
 607  * Make sure 0,1,2 file descriptors are open, so that we don't open
 608  * the filesystem using the same file descriptor as stdout or stderr.
 609  */
 610 static void reserve_stdio_fds(void)
 611 {
 612         int     fd = 0;
 613
 614         while (fd <= 2) {
 615                 fd = open("/dev/null", O_RDWR);
 616                 if (fd < 0) {
 617                         fprintf(stderr, _("ERROR: Couldn't open "
 618                                 "/dev/null (%s)\n"),
 619                                 strerror(errno));
 620                         break;
 621                 }
 622         }
 623 }
 624
 625 #ifdef HAVE_SIGNAL_H
 626 static void signal_progress_on(int sig EXT2FS_ATTR((unused)))
 627 {
 628         e2fsck_t ctx = e2fsck_global_ctx;
 629
 630         if (!ctx)
 631                 return;
 632
 633         ctx->progress = e2fsck_update_progress;
 634 }
 635
 636 static void signal_progress_off(int sig EXT2FS_ATTR((unused)))
 637 {
 638         e2fsck_t ctx = e2fsck_global_ctx;
 639
 640         if (!ctx)
 641                 return;
 642
 643         e2fsck_clear_progbar(ctx);
 644         ctx->progress = 0;
 645 }
 646
 647 static void signal_cancel(int sig EXT2FS_ATTR((unused)))
 648 {
 649         e2fsck_t ctx = e2fsck_global_ctx;
 650
 651         if (!ctx)
 652                 exit(FSCK_CANCELED);
 653
 654         ctx->flags |= E2F_FLAG_CANCEL;
 655 }
 656 #endif
 657
 658 static void initialize_profile_options(e2fsck_t ctx)
 659 {
 660         char *tmp;
 661
 662         /* [options] shared=preserve|lost+found|delete */
 663         tmp = NULL;
 664         ctx->shared = E2F_SHARED_PRESERVE;
 665         profile_get_string(ctx->profile, "options", "shared", 0,
 666                            "preserve", &tmp);
 667         if (tmp) {
 668                 if (strcmp(tmp, "preserve") == 0)
 669                         ctx->shared = E2F_SHARED_PRESERVE;
 670                 else if (strcmp(tmp, "delete") == 0)
 671                         ctx->shared = E2F_SHARED_DELETE;
 672                 else if (strcmp(tmp, "lost+found") == 0)
 673                         ctx->shared = E2F_SHARED_LPF;
 674                 else {
 675                         com_err(ctx->program_name, 0,
 676                                 _("configuration error: 'shared=%s'"), tmp);
 677                         fatal_error(ctx, 0);
 678                 }
 679                 free(tmp);
 680         }
 681
 682         /* [options] clone=dup|zero */
 683         tmp = NULL;
 684         ctx->clone = E2F_CLONE_DUP;
 685         profile_get_string(ctx->profile, "options", "clone", 0,
 686                            "dup", &tmp);
 687         if (tmp) {
 688                 if (strcmp(tmp, "dup") == 0)
 689                         ctx->clone = E2F_CLONE_DUP;
 690                 else if (strcmp(tmp, "zero") == 0)
 691                         ctx->clone = E2F_CLONE_ZERO;
 692                 else {
 693                         com_err(ctx->program_name, 0,
 694                                 _("configuration error: 'clone=%s'"), tmp);
 695                         fatal_error(ctx, 0);
 696                 }
 697                 free(tmp);
 698         }
 699 }
 700
 701 static void parse_extended_opts(e2fsck_t ctx, const char *opts)
 702 {
 703         char    *buf, *token, *next, *p, *arg;
 704         int     ea_ver;
 705         int     extended_usage = 0;
 706         unsigned long long reada_kb;
 707
 708         buf = string_copy(ctx, opts, 0);
 709         for (token = buf; token && *token; token = next) {
 710                 p = strchr(token, ',');
 711                 next = 0;
 712                 if (p) {
 713                         *p = 0;
 714                         next = p+1;
 715                 }
 716                 arg = strchr(token, '=');
 717                 if (arg) {
 718                         *arg = 0;
 719                         arg++;
 720                 }
 721                 if (strcmp(token, "ea_ver") == 0) {
 722                         if (!arg) {
 723                                 extended_usage++;
 724                                 continue;
 725                         }
 726                         ea_ver = strtoul(arg, &p, 0);
 727                         if (*p ||
 728                             ((ea_ver != 1) && (ea_ver != 2))) {
 729                                 fprintf(stderr, "%s",
 730                                         _("Invalid EA version.\n"));
 731                                 extended_usage++;
 732                                 continue;
 733                         }
 734                         ctx->ext_attr_ver = ea_ver;
 735                 } else if (strcmp(token, "readahead_kb") == 0) {
 736                         if (!arg) {
 737                                 extended_usage++;
 738                                 continue;
 739                         }
 740                         reada_kb = strtoull(arg, &p, 0);
 741                         if (*p) {
 742                                 fprintf(stderr, "%s",
 743                                         _("Invalid readahead buffer size.\n"));
 744                                 extended_usage++;
 745                                 continue;
 746                         }
 747                         ctx->readahead_kb = reada_kb;
 748                 } else if (strcmp(token, "fragcheck") == 0) {
 749                         ctx->options |= E2F_OPT_FRAGCHECK;
 750                         continue;
 751                 /* -E shared=preserve|lost+found|delete */
 752                 } else if (strcmp(token, "shared") == 0) {
 753                         if (!arg) {
 754                                 extended_usage++;
 755                                 continue;
 756                         }
 757                         if (strcmp(arg, "preserve") == 0) {
 758                                 ctx->shared = E2F_SHARED_PRESERVE;
 759                         } else if (strcmp(arg, "lost+found") == 0) {
 760                                 ctx->shared = E2F_SHARED_LPF;
 761                         } else if (strcmp(arg, "delete") == 0) {
 762                                 ctx->shared = E2F_SHARED_DELETE;
 763                         } else {
 764                                 extended_usage++;
 765                                 continue;
 766                         }
 767                 /* -E clone=dup|zero */
 768                 } else if (strcmp(token, "clone") == 0) {
 769                         if (!arg) {
 770                                 extended_usage++;
 771                                 continue;
 772                         }
 773                         if (strcmp(arg, "dup") == 0) {
 774                                 ctx->clone = E2F_CLONE_DUP;
 775                         } else if (strcmp(arg, "zero") == 0) {
 776                                 ctx->clone = E2F_CLONE_ZERO;
 777                         } else {
 778                                 extended_usage++;
 779                                 continue;
 780                         }
 781                 } else if (strcmp(token, "journal_only") == 0) {
 782                         if (arg) {
 783                                 extended_usage++;
 784                                 continue;
 785                         }
 786                         ctx->options |= E2F_OPT_JOURNAL_ONLY;
 787                 } else if (strcmp(token, "discard") == 0) {
 788                         ctx->options |= E2F_OPT_DISCARD;
 789                         continue;
 790                 } else if (strcmp(token, "nodiscard") == 0) {
 791                         ctx->options &= ~E2F_OPT_DISCARD;
 792                         continue;
 793                 } else if (strcmp(token, "optimize_extents") == 0) {
 794                         ctx->options &= ~E2F_OPT_NOOPT_EXTENTS;
 795                         continue;
 796                 } else if (strcmp(token, "no_optimize_extents") == 0) {
 797                         ctx->options |= E2F_OPT_NOOPT_EXTENTS;
 798                         continue;
 799                 } else if (strcmp(token, "inode_count_fullmap") == 0) {
 800                         ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
 801                         continue;
 802                 } else if (strcmp(token, "no_inode_count_fullmap") == 0) {
 803                         ctx->options &= ~E2F_OPT_ICOUNT_FULLMAP;
 804                         continue;
 805                 } else if (strcmp(token, "log_filename") == 0) {
 806                         if (!arg)
 807                                 extended_usage++;
 808                         else
 809                                 ctx->log_fn = string_copy(ctx, arg, 0);
 810                         continue;
 811                 } else if (strcmp(token, "bmap2extent") == 0) {
 812                         ctx->options |= E2F_OPT_CONVERT_BMAP;
 813                         continue;
 814                 } else if (strcmp(token, "fixes_only") == 0) {
 815                         ctx->options |= E2F_OPT_FIXES_ONLY;
 816                         continue;
 817                 } else if (strcmp(token, "unshare_blocks") == 0) {
 818                         ctx->options |= E2F_OPT_UNSHARE_BLOCKS;
 819                         ctx->options |= E2F_OPT_FORCE;
 820                         continue;
 821                 } else {
 822                         fprintf(stderr, _("Unknown extended option: %s\n"),
 823                                 token);
 824                         extended_usage++;
 825                 }
 826         }
 827         free(buf);
 828
 829         if (extended_usage) {
 830                 fputs(_("\nExtended options are separated by commas, "
 831                        "and may take an argument which\n"
 832                        "is set off by an equals ('=') sign.  "
 833                        "Valid extended options are:\n\n"), stderr);
 834                 fputs(_("\tea_ver=<ea_version (1 or 2)>\n"), stderr);
 835                 fputs("\tfragcheck\n", stderr);
 836                 fputs("\tjournal_only\n", stderr);
 837                 fputs("\tdiscard\n", stderr);
 838                 fputs("\tnodiscard\n", stderr);
 839                 fputs(("\tshared=<preserve|lost+found|delete>\n"), stderr);
 840                 fputs(("\tclone=<dup|zero>\n"), stderr);
 841                 fputs("\toptimize_extents\n", stderr);
 842                 fputs("\tno_optimize_extents\n", stderr);
 843                 fputs("\tinode_count_fullmap\n", stderr);
 844                 fputs("\tno_inode_count_fullmap\n", stderr);
 845                 fputs(_("\treadahead_kb=<buffer size>\n"), stderr);
 846                 fputs("\tbmap2extent\n", stderr);
 847                 fputs("\tunshare_blocks\n", stderr);
 848                 fputs("\tfixes_only\n", stderr);
 849                 fputc('\n', stderr);
 850                 exit(1);
 851         }
 852 }
 853
 854 static void syntax_err_report(const char *filename, long err, int line_num)
 855 {
 856         fprintf(stderr,
 857                 _("Syntax error in e2fsck config file (%s, line #%d)\n\t%s\n"),
 858                 filename, line_num, error_message(err));
 859         exit(FSCK_ERROR);
 860 }
 861
 862 static const char *config_fn[] = { ROOT_SYSCONFDIR "/e2fsck.conf", 0 };
 863
 864 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 865 {
 866         int             flush = 0;
 867         int             c, fd;
 868 #ifdef MTRACE
 869         extern void     *mallwatch;
 870 #endif
 871         e2fsck_t        ctx;
 872         errcode_t       retval;
 873 #ifdef HAVE_SIGNAL_H
 874         struct sigaction        sa;
 875 #endif
 876         char            *cp;
 877         int             res;            /* result of sscanf */
 878 #ifdef CONFIG_JBD_DEBUG
 879         char            *jbd_debug;
 880 #endif
 881         unsigned long long phys_mem_kb;
 882
 883         retval = e2fsck_allocate_context(&ctx);
 884         if (retval)
 885                 return retval;
 886
 887         *ret_ctx = ctx;
 888         e2fsck_global_ctx = ctx;
 889
 890         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
 891         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
 892         if (getenv("E2FSCK_FORCE_INTERACTIVE") || (isatty(0) && isatty(1))) {
 893                 ctx->interactive = 1;
 894         } else {
 895                 ctx->start_meta[0] = '\001';
 896                 ctx->stop_meta[0] = '\002';
 897         }
 898         memset(bar, '=', sizeof(bar)-1);
 899         memset(spaces, ' ', sizeof(spaces)-1);
 900         add_error_table(&et_ext2_error_table);
 901         add_error_table(&et_prof_error_table);
 902         blkid_get_cache(&ctx->blkid, NULL);
 903
 904         if (argc && *argv)
 905                 ctx->program_name = *argv;
 906         else
 907                 ctx->program_name = "e2fsck";
 908
 909         cp = getenv("E2FSCK_CONFIG");
 910         if (cp != NULL)
 911                 config_fn[0] = cp;
 912         profile_set_syntax_err_cb(syntax_err_report);
 913         profile_init(config_fn, &ctx->profile);
 914
 915         initialize_profile_options(ctx);
 916
 917         phys_mem_kb = get_memory_size() / 1024;
 918         ctx->readahead_kb = ~0ULL;
 919         while ((c = getopt(argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDkz:")) != EOF)
 920                 switch (c) {
 921                 case 'C':
 922                         ctx->progress = e2fsck_update_progress;
 923                         res = sscanf(optarg, "%d", &ctx->progress_fd);
 924                         if (res != 1)
 925                                 goto sscanf_err;
 926
 927                         if (ctx->progress_fd < 0) {
 928                                 ctx->progress = 0;
 929                                 ctx->progress_fd = ctx->progress_fd * -1;
 930                         }
 931                         if (!ctx->progress_fd)
 932                                 break;
 933                         /* Validate the file descriptor to avoid disasters */
 934                         fd = dup(ctx->progress_fd);
 935                         if (fd < 0) {
 936                                 fprintf(stderr,
 937                                 _("Error validating file descriptor %d: %s\n"),
 938                                         ctx->progress_fd,
 939                                         error_message(errno));
 940                                 fatal_error(ctx,
 941                         _("Invalid completion information file descriptor"));
 942                         } else
 943                                 close(fd);
 944                         break;
 945                 case 'D':
 946                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 947                         break;
 948                 case 'E':
 949                         parse_extended_opts(ctx, optarg);
 950                         break;
 951                 case 'p':
 952                 case 'a':
 953                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
 954                         conflict_opt:
 955                                 fatal_error(ctx,
 956         _("Only one of the options -p/-a, -n or -y may be specified."));
 957                         }
 958                         ctx->options |= E2F_OPT_PREEN;
 959                         break;
 960                 case 'n':
 961                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
 962                                 goto conflict_opt;
 963                         ctx->options |= E2F_OPT_NO;
 964                         break;
 965                 case 'y':
 966                         if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
 967                                 goto conflict_opt;
 968                         ctx->options |= E2F_OPT_YES;
 969                         break;
 970                 case 't':
 971 #ifdef RESOURCE_TRACK
 972                         if (ctx->options & E2F_OPT_TIME)
 973                                 ctx->options |= E2F_OPT_TIME2;
 974                         else
 975                                 ctx->options |= E2F_OPT_TIME;
 976 #else
 977                         fprintf(stderr, _("The -t option is not "
 978                                 "supported on this version of e2fsck.\n"));
 979 #endif
 980                         break;
 981                 case 'c':
 982                         if (cflag++)
 983                                 ctx->options |= E2F_OPT_WRITECHECK;
 984                         ctx->options |= E2F_OPT_CHECKBLOCKS;
 985                         break;
 986                 case 'r':
 987                         /* What we do by default, anyway! */
 988                         break;
 989                 case 'b':
 990                         res = sscanf(optarg, "%llu", &ctx->use_superblock);
 991                         if (res != 1)
 992                                 goto sscanf_err;
 993                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
 994                         break;
 995                 case 'B':
 996                         ctx->blocksize = atoi(optarg);
 997                         break;
 998                 case 'I':
 999                         res = sscanf(optarg, "%d", &ctx->inode_buffer_blocks);
1000                         if (res != 1)
1001                                 goto sscanf_err;
1002                         break;
1003                 case 'j':
1004                         ctx->journal_name = blkid_get_devname(ctx->blkid,
1005                                                               optarg, NULL);
1006                         if (!ctx->journal_name) {
1007                                 com_err(ctx->program_name, 0,
1008                                         _("Unable to resolve '%s'"),
1009                                         optarg);
1010                                 fatal_error(ctx, 0);
1011                         }
1012                         break;
1013                 case 'P':
1014                         res = sscanf(optarg, "%d", &ctx->process_inode_size);
1015                         if (res != 1)
1016                                 goto sscanf_err;
1017                         break;
1018                 case 'L':
1019                         replace_bad_blocks++;
1020                         /* fall through */
1021                 case 'l':
1022                         if (bad_blocks_file)
1023                                 free(bad_blocks_file);
1024                         bad_blocks_file = string_copy(ctx, optarg, 0);
1025                         break;
1026                 case 'd':
1027                         ctx->options |= E2F_OPT_DEBUG;
1028                         break;
1029                 case 'f':
1030                         ctx->options |= E2F_OPT_FORCE;
1031                         break;
1032                 case 'F':
1033                         flush = 1;
1034                         break;
1035                 case 'v':
1036                         verbose = 1;
1037                         break;
1038                 case 'V':
1039                         show_version_only = 1;
1040                         break;
1041 #ifdef MTRACE
1042                 case 'M':
1043                         mallwatch = (void *) strtol(optarg, NULL, 0);
1044                         break;
1045 #endif
1046                 case 'N':
1047                         ctx->device_name = string_copy(ctx, optarg, 0);
1048                         break;
1049                 case 'k':
1050                         keep_bad_blocks++;
1051                         break;
1052                 case 'z':
1053                         ctx->undo_file = optarg;
1054                         break;
1055                 default:
1056                         usage(ctx);
1057                 }
1058         if (show_version_only)
1059                 return 0;
1060         if (optind != argc - 1)
1061                 usage(ctx);
1062         if ((ctx->options & E2F_OPT_NO) &&
1063             (ctx->options & E2F_OPT_COMPRESS_DIRS)) {
1064                 com_err(ctx->program_name, 0, "%s",
1065                         _("The -n and -D options are incompatible."));
1066                 fatal_error(ctx, 0);
1067         }
1068         if ((ctx->options & E2F_OPT_NO) && cflag) {
1069                 com_err(ctx->program_name, 0, "%s",
1070                         _("The -n and -c options are incompatible."));
1071                 fatal_error(ctx, 0);
1072         }
1073         if ((ctx->options & E2F_OPT_NO) && bad_blocks_file) {
1074                 com_err(ctx->program_name, 0, "%s",
1075                         _("The -n and -l/-L options are incompatible."));
1076                 fatal_error(ctx, 0);
1077         }
1078         if (ctx->options & E2F_OPT_NO)
1079                 ctx->options |= E2F_OPT_READONLY;
1080
1081         ctx->io_options = strchr(argv[optind], '?');
1082         if (ctx->io_options)
1083                 *ctx->io_options++ = 0;
1084         ctx->filesystem_name = blkid_get_devname(ctx->blkid, argv[optind], 0);
1085         if (!ctx->filesystem_name) {
1086                 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
1087                         argv[optind]);
1088                 fatal_error(ctx, 0);
1089         }
1090
1091         /* Complain about mutually exclusive rebuilding activities */
1092         if (getenv("E2FSCK_FIXES_ONLY"))
1093                 ctx->options |= E2F_OPT_FIXES_ONLY;
1094         if ((ctx->options & E2F_OPT_COMPRESS_DIRS) &&
1095             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1096                 com_err(ctx->program_name, 0, "%s",
1097                         _("The -D and -E fixes_only options are incompatible."));
1098                 fatal_error(ctx, 0);
1099         }
1100         if ((ctx->options & E2F_OPT_CONVERT_BMAP) &&
1101             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1102                 com_err(ctx->program_name, 0, "%s",
1103                         _("The -E bmap2extent and fixes_only options are incompatible."));
1104                 fatal_error(ctx, 0);
1105         }
1106
1107         profile_get_boolean(ctx->profile, "options", "report_time", 0, 0,
1108                             &c);
1109         if (c)
1110                 ctx->options |= E2F_OPT_TIME | E2F_OPT_TIME2;
1111         profile_get_boolean(ctx->profile, "options", "report_verbose", 0, 0,
1112                             &c);
1113         if (c)
1114                 verbose = 1;
1115
1116         profile_get_boolean(ctx->profile, "options", "no_optimize_extents",
1117                             0, 0, &c);
1118         if (c)
1119                 ctx->options |= E2F_OPT_NOOPT_EXTENTS;
1120
1121         profile_get_boolean(ctx->profile, "options", "inode_count_fullmap",
1122                             0, 0, &c);
1123         if (c)
1124                 ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
1125
1126         if (ctx->readahead_kb == ~0ULL) {
1127                 profile_get_integer(ctx->profile, "options",
1128                                     "readahead_mem_pct", 0, -1, &c);
1129                 if (c >= 0 && c <= 100)
1130                         ctx->readahead_kb = phys_mem_kb * c / 100;
1131                 profile_get_integer(ctx->profile, "options",
1132                                     "readahead_kb", 0, -1, &c);
1133                 if (c >= 0)
1134                         ctx->readahead_kb = c;
1135                 if (ctx->readahead_kb != ~0ULL &&
1136                     ctx->readahead_kb > phys_mem_kb)
1137                         ctx->readahead_kb = phys_mem_kb;
1138         }
1139
1140         /* Turn off discard in read-only mode */
1141         if ((ctx->options & E2F_OPT_NO) &&
1142             (ctx->options & E2F_OPT_DISCARD))
1143                 ctx->options &= ~E2F_OPT_DISCARD;
1144
1145         if (flush) {
1146                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
1147                 if (fd < 0) {
1148                         com_err("open", errno,
1149                                 _("while opening %s for flushing"),
1150                                 ctx->filesystem_name);
1151                         fatal_error(ctx, 0);
1152                 }
1153                 if ((retval = ext2fs_sync_device(fd, 1))) {
1154                         com_err("ext2fs_sync_device", retval,
1155                                 _("while trying to flush %s"),
1156                                 ctx->filesystem_name);
1157                         fatal_error(ctx, 0);
1158                 }
1159                 close(fd);
1160         }
1161         if (cflag && bad_blocks_file) {
1162                 fprintf(stderr, "%s", _("The -c and the -l/-L options may not "
1163                                         "be both used at the same time.\n"));
1164                 exit(FSCK_USAGE);
1165         }
1166 #ifdef HAVE_SIGNAL_H
1167         /*
1168          * Set up signal action
1169          */
1170         memset(&sa, 0, sizeof(struct sigaction));
1171         sa.sa_handler = signal_cancel;
1172         sigaction(SIGINT, &sa, 0);
1173         sigaction(SIGTERM, &sa, 0);
1174 #ifdef SA_RESTART
1175         sa.sa_flags = SA_RESTART;
1176 #endif
1177         sa.sa_handler = signal_progress_on;
1178         sigaction(SIGUSR1, &sa, 0);
1179         sa.sa_handler = signal_progress_off;
1180         sigaction(SIGUSR2, &sa, 0);
1181 #endif
1182
1183         /* Update our PATH to include /sbin if we need to run badblocks  */
1184         if (cflag) {
1185                 char *oldpath = getenv("PATH");
1186                 char *newpath;
1187                 int len = sizeof(PATH_SET) + 1;
1188
1189                 if (oldpath)
1190                         len += strlen(oldpath);
1191
1192                 newpath = malloc(len);
1193                 if (!newpath)
1194                         fatal_error(ctx, "Couldn't malloc() newpath");
1195                 strcpy(newpath, PATH_SET);
1196
1197                 if (oldpath) {
1198                         strcat(newpath, ":");
1199                         strcat(newpath, oldpath);
1200                 }
1201                 putenv(newpath);
1202         }
1203 #ifdef CONFIG_JBD_DEBUG
1204         jbd_debug = getenv("E2FSCK_JBD_DEBUG");
1205         if (jbd_debug) {
1206                 res = sscanf(jbd_debug, "%d", &journal_enable_debug);
1207                 if (res != 1) {
1208                         fprintf(stderr,
1209                                 _("E2FSCK_JBD_DEBUG \"%s\" not an integer\n\n"),
1210                                 jbd_debug);
1211                         exit (1);
1212                 }
1213         }
1214 #endif
1215         return 0;
1216
1217 sscanf_err:
1218         fprintf(stderr, _("\nInvalid non-numeric argument to -%c (\"%s\")\n\n"),
1219                 c, optarg);
1220         exit (1);
1221 }
1222
1223 static errcode_t try_open_fs(e2fsck_t ctx, int flags, io_manager io_ptr,
1224                              ext2_filsys *ret_fs)
1225 {
1226         errcode_t retval;
1227
1228         *ret_fs = NULL;
1229         if (ctx->superblock && ctx->blocksize) {
1230                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1231                                       flags, ctx->superblock, ctx->blocksize,
1232                                       io_ptr, ret_fs);
1233         } else if (ctx->superblock) {
1234                 int blocksize;
1235                 for (blocksize = EXT2_MIN_BLOCK_SIZE;
1236                      blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
1237                         if (*ret_fs) {
1238                                 ext2fs_free(*ret_fs);
1239                                 *ret_fs = NULL;
1240                         }
1241                         retval = ext2fs_open2(ctx->filesystem_name,
1242                                               ctx->io_options, flags,
1243                                               ctx->superblock, blocksize,
1244                                               io_ptr, ret_fs);
1245                         if (!retval)
1246                                 break;
1247                 }
1248         } else
1249                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1250                                       flags, 0, 0, io_ptr, ret_fs);
1251
1252         if (retval == 0) {
1253                 (*ret_fs)->priv_data = ctx;
1254                 e2fsck_set_bitmap_type(*ret_fs, EXT2FS_BMAP64_RBTREE,
1255                                        "default", NULL);
1256         }
1257         return retval;
1258 }
1259
1260 static const char *my_ver_string = E2FSPROGS_VERSION;
1261 static const char *my_ver_date = E2FSPROGS_DATE;
1262
1263 static errcode_t e2fsck_check_mmp(ext2_filsys fs, e2fsck_t ctx)
1264 {
1265         struct mmp_struct *mmp_s;
1266         unsigned int mmp_check_interval;
1267         errcode_t retval = 0;
1268         struct problem_context pctx;
1269         unsigned int wait_time = 0;
1270
1271         clear_problem_context(&pctx);
1272         if (fs->mmp_buf == NULL) {
1273                 retval = ext2fs_get_mem(fs->blocksize, &fs->mmp_buf);
1274                 if (retval)
1275                         goto check_error;
1276         }
1277
1278         retval = ext2fs_mmp_read(fs, fs->super->s_mmp_block, fs->mmp_buf);
1279         if (retval)
1280                 goto check_error;
1281
1282         mmp_s = fs->mmp_buf;
1283
1284         mmp_check_interval = fs->super->s_mmp_update_interval;
1285         if (mmp_check_interval < EXT4_MMP_MIN_CHECK_INTERVAL)
1286                 mmp_check_interval = EXT4_MMP_MIN_CHECK_INTERVAL;
1287
1288         /*
1289          * If check_interval in MMP block is larger, use that instead of
1290          * check_interval from the superblock.
1291          */
1292         if (mmp_s->mmp_check_interval > mmp_check_interval)
1293                 mmp_check_interval = mmp_s->mmp_check_interval;
1294
1295         wait_time = mmp_check_interval * 2 + 1;
1296
1297         if (mmp_s->mmp_seq == EXT4_MMP_SEQ_CLEAN)
1298                 retval = 0;
1299         else if (mmp_s->mmp_seq == EXT4_MMP_SEQ_FSCK)
1300                 retval = EXT2_ET_MMP_FSCK_ON;
1301         else if (mmp_s->mmp_seq > EXT4_MMP_SEQ_MAX)
1302                 retval = EXT2_ET_MMP_UNKNOWN_SEQ;
1303
1304         if (retval)
1305                 goto check_error;
1306
1307         /* Print warning if e2fsck will wait for more than 20 secs. */
1308         if (verbose || wait_time > EXT4_MMP_MIN_CHECK_INTERVAL * 4) {
1309                 log_out(ctx, _("MMP interval is %u seconds and total wait "
1310                                "time is %u seconds. Please wait...\n"),
1311                         mmp_check_interval, wait_time * 2);
1312         }
1313
1314         return 0;
1315
1316 check_error:
1317
1318         if (retval == EXT2_ET_MMP_BAD_BLOCK) {
1319                 if (fix_problem(ctx, PR_0_MMP_INVALID_BLK, &pctx)) {
1320                         fs->super->s_mmp_block = 0;
1321                         ext2fs_mark_super_dirty(fs);
1322                         retval = 0;
1323                 }
1324         } else if (retval == EXT2_ET_MMP_FAILED) {
1325                 com_err(ctx->program_name, retval, "%s",
1326                         _("while checking MMP block"));
1327                 dump_mmp_msg(fs->mmp_buf, NULL);
1328         } else if (retval == EXT2_ET_MMP_FSCK_ON ||
1329                    retval == EXT2_ET_MMP_UNKNOWN_SEQ) {
1330                 com_err(ctx->program_name, retval, "%s",
1331                         _("while checking MMP block"));
1332                 dump_mmp_msg(fs->mmp_buf,
1333                              _("If you are sure the filesystem is not "
1334                                "in use on any node, run:\n"
1335                                "'tune2fs -f -E clear_mmp %s'\n"),
1336                              ctx->device_name);
1337         } else if (retval == EXT2_ET_MMP_MAGIC_INVALID) {
1338                 if (fix_problem(ctx, PR_0_MMP_INVALID_MAGIC, &pctx)) {
1339                         ext2fs_mmp_clear(fs);
1340                         retval = 0;
1341                 }
1342         } else if (retval == EXT2_ET_MMP_CSUM_INVALID) {
1343                 if (fix_problem(ctx, PR_0_MMP_CSUM_INVALID, &pctx)) {
1344                         ext2fs_mmp_clear(fs);
1345                         retval = 0;
1346                 }
1347         } else
1348                 com_err(ctx->program_name, retval, "%s",
1349                         _("while reading MMP block"));
1350         return retval;
1351 }
1352
1353 static int e2fsck_setup_tdb(e2fsck_t ctx, io_manager *io_ptr)
1354 {
1355         errcode_t retval = ENOMEM;
1356         char *tdb_dir = NULL, *tdb_file = NULL;
1357         char *dev_name, *tmp_name;
1358         int free_tdb_dir = 0;
1359
1360         /* (re)open a specific undo file */
1361         if (ctx->undo_file && ctx->undo_file[0] != 0) {
1362                 retval = set_undo_io_backing_manager(*io_ptr);
1363                 if (retval)
1364                         goto err;
1365                 *io_ptr = undo_io_manager;
1366                 retval = set_undo_io_backup_file(ctx->undo_file);
1367                 if (retval)
1368                         goto err;
1369                 printf(_("Overwriting existing filesystem; this can be undone "
1370                          "using the command:\n"
1371                          "    e2undo %s %s\n\n"),
1372                         ctx->undo_file, ctx->filesystem_name);
1373                 return retval;
1374         }
1375
1376         /*
1377          * Configuration via a conf file would be
1378          * nice
1379          */
1380         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
1381         if (!tdb_dir) {
1382                 profile_get_string(ctx->profile, "defaults",
1383                                    "undo_dir", 0, "/var/lib/e2fsprogs",
1384                                    &tdb_dir);
1385                 free_tdb_dir = 1;
1386         }
1387
1388         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
1389             access(tdb_dir, W_OK)) {
1390                 if (free_tdb_dir)
1391                         free(tdb_dir);
1392                 return 0;
1393         }
1394
1395         tmp_name = strdup(ctx->filesystem_name);
1396         if (!tmp_name)
1397                 goto errout;
1398         dev_name = basename(tmp_name);
1399         tdb_file = malloc(strlen(tdb_dir) + 8 + strlen(dev_name) + 7 + 1);
1400         if (!tdb_file) {
1401                 free(tmp_name);
1402                 goto errout;
1403         }
1404         sprintf(tdb_file, "%s/e2fsck-%s.e2undo", tdb_dir, dev_name);
1405         free(tmp_name);
1406
1407         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
1408                 retval = errno;
1409                 com_err(ctx->program_name, retval,
1410                         _("while trying to delete %s"), tdb_file);
1411                 goto errout;
1412         }
1413
1414         retval = set_undo_io_backing_manager(*io_ptr);
1415         if (retval)
1416                 goto errout;
1417         *io_ptr = undo_io_manager;
1418         retval = set_undo_io_backup_file(tdb_file);
1419         if (retval)
1420                 goto errout;
1421         printf(_("Overwriting existing filesystem; this can be undone "
1422                  "using the command:\n"
1423                  "    e2undo %s %s\n\n"), tdb_file, ctx->filesystem_name);
1424
1425         if (free_tdb_dir)
1426                 free(tdb_dir);
1427         free(tdb_file);
1428         return 0;
1429
1430 errout:
1431         if (free_tdb_dir)
1432                 free(tdb_dir);
1433         free(tdb_file);
1434 err:
1435         com_err(ctx->program_name, retval, "%s",
1436                 _("while trying to setup undo file\n"));
1437         return retval;
1438 }
1439
1440 int main (int argc, char *argv[])
1441 {
1442         errcode_t       retval = 0, retval2 = 0, orig_retval = 0;
1443         int             exit_value = FSCK_OK;
1444         ext2_filsys     fs = 0;
1445         io_manager      io_ptr;
1446         struct ext2_super_block *sb;
1447         const char      *lib_ver_date;
1448         int             my_ver, lib_ver;
1449         e2fsck_t        ctx;
1450         blk64_t         orig_superblock = ~(blk64_t)0;
1451         struct problem_context pctx;
1452         int flags, run_result, was_changed;
1453         int journal_size;
1454         int sysval, sys_page_size = 4096;
1455         int old_bitmaps;
1456         __u32 features[3];
1457         char *cp;
1458         enum quota_type qtype;
1459
1460         clear_problem_context(&pctx);
1461         sigcatcher_setup();
1462 #ifdef MTRACE
1463         mtrace();
1464 #endif
1465 #ifdef MCHECK
1466         mcheck(0);
1467 #endif
1468 #ifdef ENABLE_NLS
1469         setlocale(LC_MESSAGES, "");
1470         setlocale(LC_CTYPE, "");
1471         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1472         textdomain(NLS_CAT_NAME);
1473         set_com_err_gettext(gettext);
1474 #endif
1475         my_ver = ext2fs_parse_version_string(my_ver_string);
1476         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
1477         if (my_ver > lib_ver) {
1478                 fprintf( stderr, "%s",
1479                          _("Error: ext2fs library version out of date!\n"));
1480                 show_version_only++;
1481         }
1482
1483         retval = PRS(argc, argv, &ctx);
1484         if (retval) {
1485                 com_err("e2fsck", retval, "%s",
1486                         _("while trying to initialize program"));
1487                 exit(FSCK_ERROR);
1488         }
1489         reserve_stdio_fds();
1490
1491         set_up_logging(ctx);
1492         if (ctx->logf) {
1493                 int i;
1494                 fputs("E2fsck run: ", ctx->logf);
1495                 for (i = 0; i < argc; i++) {
1496                         if (i)
1497                                 fputc(' ', ctx->logf);
1498                         fputs(argv[i], ctx->logf);
1499                 }
1500                 fputc('\n', ctx->logf);
1501         }
1502
1503         init_resource_track(&ctx->global_rtrack, NULL);
1504         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
1505                 log_err(ctx, "e2fsck %s (%s)\n", my_ver_string,
1506                          my_ver_date);
1507
1508         if (show_version_only) {
1509                 log_err(ctx, _("\tUsing %s, %s\n"),
1510                         error_message(EXT2_ET_BASE), lib_ver_date);
1511                 exit(FSCK_OK);
1512         }
1513
1514         check_mount(ctx);
1515
1516         if (!(ctx->options & E2F_OPT_PREEN) &&
1517             !(ctx->options & E2F_OPT_NO) &&
1518             !(ctx->options & E2F_OPT_YES)) {
1519                 if (!ctx->interactive)
1520                         fatal_error(ctx,
1521                                     _("need terminal for interactive repairs"));
1522         }
1523         ctx->superblock = ctx->use_superblock;
1524
1525         flags = EXT2_FLAG_SKIP_MMP;
1526 restart:
1527 #ifdef CONFIG_TESTIO_DEBUG
1528         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1529                 io_ptr = test_io_manager;
1530                 test_io_backing_manager = unix_io_manager;
1531         } else
1532 #endif
1533                 io_ptr = unix_io_manager;
1534         flags |= EXT2_FLAG_NOFREE_ON_ERROR;
1535         profile_get_boolean(ctx->profile, "options", "old_bitmaps", 0, 0,
1536                             &old_bitmaps);
1537         if (!old_bitmaps)
1538                 flags |= EXT2_FLAG_64BITS;
1539         if ((ctx->options & E2F_OPT_READONLY) == 0) {
1540                 flags |= EXT2_FLAG_RW;
1541                 if (!(ctx->mount_flags & EXT2_MF_ISROOT &&
1542                       ctx->mount_flags & EXT2_MF_READONLY))
1543                         flags |= EXT2_FLAG_EXCLUSIVE;
1544                 if ((ctx->mount_flags & EXT2_MF_READONLY) &&
1545                     (ctx->options & E2F_OPT_FORCE))
1546                         flags &= ~EXT2_FLAG_EXCLUSIVE;
1547         }
1548
1549         if (ctx->undo_file) {
1550                 retval = e2fsck_setup_tdb(ctx, &io_ptr);
1551                 if (retval)
1552                         exit(FSCK_ERROR);
1553         }
1554
1555         ctx->openfs_flags = flags;
1556         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1557
1558         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
1559             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
1560             ((retval == EXT2_ET_BAD_MAGIC) ||
1561              (retval == EXT2_ET_SB_CSUM_INVALID) ||
1562              (retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1563              ((retval == 0) && (retval2 = ext2fs_check_desc(fs))))) {
1564                 if (retval) {
1565                         pctx.errcode = retval;
1566                         fix_problem(ctx, PR_0_OPEN_FAILED, &pctx);
1567                 }
1568                 if (retval2) {
1569                         pctx.errcode = retval2;
1570                         fix_problem(ctx, PR_0_CHECK_DESC_FAILED, &pctx);
1571                 }
1572                 pctx.errcode = 0;
1573                 if (retval2 == ENOMEM || retval2 == EXT2_ET_NO_MEMORY) {
1574                         retval = retval2;
1575                         goto failure;
1576                 }
1577                 if (fs->flags & EXT2_FLAG_NOFREE_ON_ERROR) {
1578                         ext2fs_free(fs);
1579                         fs = NULL;
1580                 }
1581                 if (!fs || (fs->group_desc_count > 1)) {
1582                         log_out(ctx, _("%s: %s trying backup blocks...\n"),
1583                                 ctx->program_name,
1584                                 retval ? _("Superblock invalid,") :
1585                                 _("Group descriptors look bad..."));
1586                         orig_superblock = ctx->superblock;
1587                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
1588                         if (fs)
1589                                 ext2fs_close_free(&fs);
1590                         orig_retval = retval;
1591                         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1592                         if ((orig_retval == 0) && retval != 0) {
1593                                 if (fs)
1594                                         ext2fs_close_free(&fs);
1595                                 log_out(ctx, _("%s: %s while using the "
1596                                                "backup blocks"),
1597                                         ctx->program_name,
1598                                         error_message(retval));
1599                                 log_out(ctx, _("%s: going back to original "
1600                                                "superblock\n"),
1601                                         ctx->program_name);
1602                                 ctx->superblock = orig_superblock;
1603                                 retval = try_open_fs(ctx, flags, io_ptr, &fs);
1604                         }
1605                 }
1606         }
1607         if (((retval == EXT2_ET_UNSUPP_FEATURE) ||
1608              (retval == EXT2_ET_RO_UNSUPP_FEATURE)) &&
1609             fs && fs->super) {
1610                 sb = fs->super;
1611                 features[0] = (sb->s_feature_compat &
1612                                ~EXT2_LIB_FEATURE_COMPAT_SUPP);
1613                 features[1] = (sb->s_feature_incompat &
1614                                ~EXT2_LIB_FEATURE_INCOMPAT_SUPP);
1615                 features[2] = (sb->s_feature_ro_compat &
1616                                ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1617                 if (features[0] || features[1] || features[2])
1618                         goto print_unsupp_features;
1619         }
1620 failure:
1621         if (retval) {
1622                 if (orig_retval)
1623                         retval = orig_retval;
1624                 com_err(ctx->program_name, retval, _("while trying to open %s"),
1625                         ctx->filesystem_name);
1626                 if (retval == EXT2_ET_REV_TOO_HIGH) {
1627                         log_out(ctx, "%s",
1628                                 _("The filesystem revision is apparently "
1629                                   "too high for this version of e2fsck.\n"
1630                                   "(Or the filesystem superblock "
1631                                   "is corrupt)\n\n"));
1632                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1633                 } else if (retval == EXT2_ET_SHORT_READ)
1634                         log_out(ctx, "%s",
1635                                 _("Could this be a zero-length partition?\n"));
1636                 else if ((retval == EPERM) || (retval == EACCES))
1637                         log_out(ctx, _("You must have %s access to the "
1638                                        "filesystem or be root\n"),
1639                                (ctx->options & E2F_OPT_READONLY) ?
1640                                "r/o" : "r/w");
1641                 else if (retval == ENXIO)
1642                         log_out(ctx, "%s",
1643                                 _("Possibly non-existent or swap device?\n"));
1644                 else if (retval == EBUSY)
1645                         log_out(ctx, "%s", _("Filesystem mounted or opened "
1646                                          "exclusively by another program?\n"));
1647                 else if (retval == ENOENT)
1648                         log_out(ctx, "%s",
1649                                 _("Possibly non-existent device?\n"));
1650 #ifdef EROFS
1651                 else if (retval == EROFS)
1652                         log_out(ctx, "%s", _("Disk write-protected; use the "
1653                                              "-n option to do a read-only\n"
1654                                              "check of the device.\n"));
1655 #endif
1656                 else {
1657                         /*
1658                          * Let's try once more will less consistency checking
1659                          * so that we are able to recover from more errors
1660                          * (e.g. some tool messing up some value in the sb).
1661                          */
1662                         if ((retval == EXT2_ET_CORRUPT_SUPERBLOCK) &&
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 &&
1749             (sb->s_volume_name[0] != 0)) {
1750                 ctx->device_name = string_copy(ctx, sb->s_volume_name,
1751                                                sizeof(sb->s_volume_name));
1752         }
1753         if (ctx->device_name == 0)
1754                 ctx->device_name = string_copy(ctx, ctx->filesystem_name, 0);
1755         for (cp = ctx->device_name; *cp; cp++)
1756                 if (isspace(*cp) || *cp == ':')
1757                         *cp = '_';
1758
1759         ehandler_init(fs->io);
1760
1761         if (ext2fs_has_feature_mmp(fs->super) &&
1762             (flags & EXT2_FLAG_SKIP_MMP)) {
1763                 if (e2fsck_check_mmp(fs, ctx))
1764                         fatal_error(ctx, 0);
1765
1766                 /*
1767                  * Restart in order to reopen fs but this time start mmp.
1768                  */
1769                 ext2fs_close_free(&ctx->fs);
1770                 flags &= ~EXT2_FLAG_SKIP_MMP;
1771                 goto restart;
1772         }
1773
1774         if (ctx->logf)
1775                 fprintf(ctx->logf, "Filesystem UUID: %s\n",
1776                         e2p_uuid2str(sb->s_uuid));
1777
1778         /*
1779          * Make sure the ext3 superblock fields are consistent.
1780          */
1781         if ((ctx->mount_flags & (EXT2_MF_MOUNTED | EXT2_MF_BUSY)) == 0) {
1782                 retval = e2fsck_check_ext3_journal(ctx);
1783                 if (retval) {
1784                         com_err(ctx->program_name, retval,
1785                                 _("while checking journal for %s"),
1786                                 ctx->device_name);
1787                         fatal_error(ctx,
1788                                 _("Cannot proceed with file system check"));
1789                 }
1790         }
1791
1792         /*
1793          * Check to see if we need to do ext3-style recovery.  If so,
1794          * do it, and then restart the fsck.
1795          */
1796         if (ext2fs_has_feature_journal_needs_recovery(sb)) {
1797                 if (ctx->options & E2F_OPT_READONLY) {
1798                         log_out(ctx, "%s",
1799                                 _("Warning: skipping journal recovery because "
1800                                   "doing a read-only filesystem check.\n"));
1801                         io_channel_flush(ctx->fs->io);
1802                 } else {
1803                         if (ctx->flags & E2F_FLAG_RESTARTED) {
1804                                 /*
1805                                  * Whoops, we attempted to run the
1806                                  * journal twice.  This should never
1807                                  * happen, unless the hardware or
1808                                  * device driver is being bogus.
1809                                  */
1810                                 com_err(ctx->program_name, 0,
1811                                         _("unable to set superblock flags "
1812                                           "on %s\n"), ctx->device_name);
1813                                 fatal_error(ctx, 0);
1814                         }
1815                         retval = e2fsck_run_ext3_journal(ctx);
1816                         if (retval == EFSBADCRC) {
1817                                 log_out(ctx, _("Journal checksum error "
1818                                                "found in %s\n"),
1819                                         ctx->device_name);
1820                         } else if (retval == EFSCORRUPTED) {
1821                                 log_out(ctx, _("Journal corrupted in %s\n"),
1822                                         ctx->device_name);
1823                         } else if (retval) {
1824                                 com_err(ctx->program_name, retval,
1825                                 _("while recovering journal of %s"),
1826                                         ctx->device_name);
1827                         }
1828                         ext2fs_close_free(&ctx->fs);
1829                         ctx->flags |= E2F_FLAG_RESTARTED;
1830                         goto restart;
1831                 }
1832         }
1833
1834         /*
1835          * Check for compatibility with the feature sets.  We need to
1836          * be more stringent than ext2fs_open().
1837          */
1838         features[0] = sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP;
1839         features[1] = sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP;
1840         features[2] = (sb->s_feature_ro_compat &
1841                        ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1842 print_unsupp_features:
1843         if (features[0] || features[1] || features[2]) {
1844                 int     i, j;
1845                 __u32   *mask = features, m;
1846
1847                 log_err(ctx, _("%s has unsupported feature(s):"),
1848                         ctx->filesystem_name);
1849
1850                 for (i=0; i <3; i++,mask++) {
1851                         for (j=0,m=1; j < 32; j++, m<<=1) {
1852                                 if (*mask & m)
1853                                         log_err(ctx, " %s",
1854                                                 e2p_feature2string(i, m));
1855                         }
1856                 }
1857                 log_err(ctx, "\n");
1858                 goto get_newer;
1859         }
1860
1861         /*
1862          * If the user specified a specific superblock, presumably the
1863          * master superblock has been trashed.  So we mark the
1864          * superblock as dirty, so it can be written out.
1865          */
1866         if (ctx->superblock &&
1867             !(ctx->options & E2F_OPT_READONLY))
1868                 ext2fs_mark_super_dirty(fs);
1869
1870         /*
1871          * Calculate the number of filesystem blocks per pagesize.  If
1872          * fs->blocksize > page_size, set the number of blocks per
1873          * pagesize to 1 to avoid division by zero errors.
1874          */
1875 #ifdef _SC_PAGESIZE
1876         sysval = sysconf(_SC_PAGESIZE);
1877         if (sysval > 0)
1878                 sys_page_size = sysval;
1879 #endif /* _SC_PAGESIZE */
1880         ctx->blocks_per_page = sys_page_size / fs->blocksize;
1881         if (ctx->blocks_per_page == 0)
1882                 ctx->blocks_per_page = 1;
1883
1884         if (ctx->superblock)
1885                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
1886         ext2fs_mark_valid(fs);
1887         check_super_block(ctx);
1888         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1889                 fatal_error(ctx, 0);
1890         check_if_skip(ctx);
1891         check_resize_inode(ctx);
1892         if (bad_blocks_file)
1893                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
1894         else if (cflag)
1895                 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
1896         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1897                 fatal_error(ctx, 0);
1898
1899         /*
1900          * Mark the system as valid, 'til proven otherwise
1901          */
1902         ext2fs_mark_valid(fs);
1903
1904         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
1905         if (retval) {
1906                 log_out(ctx, _("%s: %s while reading bad blocks inode\n"),
1907                         ctx->program_name, error_message(retval));
1908                 preenhalt(ctx);
1909                 log_out(ctx, "%s", _("This doesn't bode well, "
1910                                      "but we'll try to go on...\n"));
1911         }
1912
1913         /*
1914          * Save the journal size in megabytes.
1915          * Try and use the journal size from the backup else let e2fsck
1916          * find the default journal size.
1917          */
1918         if (sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS)
1919                 journal_size = (sb->s_jnl_blocks[15] << (32 - 20)) |
1920                                (sb->s_jnl_blocks[16] >> 20);
1921         else
1922                 journal_size = -1;
1923
1924         if (ext2fs_has_feature_quota(sb)) {
1925                 /* Quotas were enabled. Do quota accounting during fsck. */
1926                 clear_problem_context(&pctx);
1927                 pctx.errcode = quota_init_context(&ctx->qctx, ctx->fs, 0);
1928                 if (pctx.errcode) {
1929                         fix_problem(ctx, PR_0_QUOTA_INIT_CTX, &pctx);
1930                         fatal_error(ctx, 0);
1931                 }
1932         }
1933
1934         run_result = e2fsck_run(ctx);
1935         e2fsck_clear_progbar(ctx);
1936
1937         if (!ctx->invalid_bitmaps &&
1938             (ctx->flags & E2F_FLAG_JOURNAL_INODE)) {
1939                 if (fix_problem(ctx, PR_6_RECREATE_JOURNAL, &pctx)) {
1940                         if (journal_size < 1024)
1941                                 journal_size = ext2fs_default_journal_size(ext2fs_blocks_count(fs->super));
1942                         if (journal_size < 0) {
1943                                 ext2fs_clear_feature_journal(fs->super);
1944                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1945                                 log_out(ctx, "%s: Couldn't determine "
1946                                         "journal size\n", ctx->program_name);
1947                                 goto no_journal;
1948                         }
1949                         log_out(ctx, _("Creating journal (%d blocks): "),
1950                                journal_size);
1951                         fflush(stdout);
1952                         retval = ext2fs_add_journal_inode(fs,
1953                                                           journal_size, 0);
1954                         if (retval) {
1955                                 log_out(ctx, "%s: while trying to create "
1956                                         "journal\n", error_message(retval));
1957                                 goto no_journal;
1958                         }
1959                         log_out(ctx, "%s", _(" Done.\n"));
1960                         log_out(ctx, "%s",
1961                                 _("\n*** journal has been regenerated ***\n"));
1962                 }
1963         }
1964 no_journal:
1965
1966         if (run_result & E2F_FLAG_ABORT) {
1967                 fatal_error(ctx, _("aborted"));
1968         } else if (run_result & E2F_FLAG_CANCEL) {
1969                 log_out(ctx, _("%s: e2fsck canceled.\n"), ctx->device_name ?
1970                         ctx->device_name : ctx->filesystem_name);
1971                 exit_value |= FSCK_CANCELED;
1972         } else if (ctx->qctx && !ctx->invalid_bitmaps) {
1973                 int needs_writeout;
1974
1975                 for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
1976                         if (*quota_sb_inump(sb, qtype) == 0)
1977                                 continue;
1978                         needs_writeout = 0;
1979                         pctx.num = qtype;
1980                         retval = quota_compare_and_update(ctx->qctx, qtype,
1981                                                           &needs_writeout);
1982                         if ((retval || needs_writeout) &&
1983                             fix_problem(ctx, PR_6_UPDATE_QUOTAS, &pctx)) {
1984                                 pctx.errcode = quota_write_inode(ctx->qctx,
1985                                                                  1 << qtype);
1986                                 if (pctx.errcode)
1987                                         (void) fix_problem(ctx,
1988                                                 PR_6_WRITE_QUOTAS, &pctx);
1989                         }
1990                 }
1991                 quota_release_context(&ctx->qctx);
1992         }
1993
1994         if (run_result == E2F_FLAG_RESTART) {
1995                 log_out(ctx, "%s",
1996                         _("Restarting e2fsck from the beginning...\n"));
1997                 retval = e2fsck_reset_context(ctx);
1998                 if (retval) {
1999                         com_err(ctx->program_name, retval, "%s",
2000                                 _("while resetting context"));
2001                         fatal_error(ctx, 0);
2002                 }
2003                 ext2fs_close_free(&ctx->fs);
2004                 goto restart;
2005         }
2006
2007 #ifdef MTRACE
2008         mtrace_print("Cleanup");
2009 #endif
2010         was_changed = ext2fs_test_changed(fs);
2011         if (!(ctx->flags & E2F_FLAG_RUN_RETURN) &&
2012             !(ctx->options & E2F_OPT_READONLY)) {
2013                 if (ext2fs_test_valid(fs)) {
2014                         if (!(sb->s_state & EXT2_VALID_FS))
2015                                 exit_value |= FSCK_NONDESTRUCT;
2016                         sb->s_state = EXT2_VALID_FS;
2017                         if (check_backup_super_block(ctx))
2018                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2019                 } else
2020                         sb->s_state &= ~EXT2_VALID_FS;
2021                 if (!(ctx->flags & E2F_FLAG_TIME_INSANE))
2022                         sb->s_lastcheck = ctx->now;
2023                 sb->s_mnt_count = 0;
2024                 memset(((char *) sb) + EXT4_S_ERR_START, 0, EXT4_S_ERR_LEN);
2025                 pctx.errcode = ext2fs_set_gdt_csum(ctx->fs);
2026                 if (pctx.errcode)
2027                         fix_problem(ctx, PR_6_SET_BG_CHECKSUM, &pctx);
2028                 ext2fs_mark_super_dirty(fs);
2029         }
2030
2031         if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2032             (ctx->options & E2F_OPT_UNSHARE_BLOCKS) &&
2033             (ctx->options & E2F_OPT_NO))
2034                 /* Don't try to write or flush I/O, we just wanted to know whether or
2035                  * not there were enough free blocks to undo deduplication.
2036                  */
2037                 goto skip_write;
2038
2039         if (!(ctx->options & E2F_OPT_READONLY)) {
2040                 e2fsck_write_bitmaps(ctx);
2041                 if (fs->flags & EXT2_FLAG_DIRTY) {
2042                         pctx.errcode = ext2fs_flush(ctx->fs);
2043                         if (pctx.errcode)
2044                                 fix_problem(ctx, PR_6_FLUSH_FILESYSTEM, &pctx);
2045                 }
2046                 pctx.errcode = io_channel_flush(ctx->fs->io);
2047                 if (pctx.errcode)
2048                         fix_problem(ctx, PR_6_IO_FLUSH, &pctx);
2049         }
2050
2051         if (was_changed) {
2052                 int fs_fixed = (ctx->flags & E2F_FLAG_PROBLEMS_FIXED);
2053
2054                 if (fs_fixed)
2055                         exit_value |= FSCK_NONDESTRUCT;
2056                 if (!(ctx->options & E2F_OPT_PREEN)) {
2057 #if 0   /* Do this later; it breaks too many tests' golden outputs */
2058                         log_out(ctx, fs_fixed ?
2059                                 _("\n%s: ***** FILE SYSTEM ERRORS "
2060                                   "CORRECTED *****\n") :
2061                                 _("%s: File system was modified.\n"),
2062                                 ctx->device_name);
2063 #else
2064                         log_out(ctx,
2065                                 _("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
2066                                 ctx->device_name);
2067 #endif
2068                 }
2069                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
2070                         log_out(ctx, _("%s: ***** REBOOT SYSTEM *****\n"),
2071                                 ctx->device_name);
2072                         exit_value |= FSCK_REBOOT;
2073                 }
2074         }
2075
2076 skip_write:
2077         if (!ext2fs_test_valid(fs) ||
2078             ((exit_value & FSCK_CANCELED) &&
2079              (sb->s_state & EXT2_ERROR_FS))) {
2080                 log_out(ctx, _("\n%s: ********** WARNING: Filesystem still has "
2081                                "errors **********\n\n"), ctx->device_name);
2082                 exit_value |= FSCK_UNCORRECTED;
2083                 exit_value &= ~FSCK_NONDESTRUCT;
2084         }
2085         if (exit_value & FSCK_CANCELED) {
2086                 int     allow_cancellation;
2087
2088                 profile_get_boolean(ctx->profile, "options",
2089                                     "allow_cancellation", 0, 0,
2090                                     &allow_cancellation);
2091                 exit_value &= ~FSCK_NONDESTRUCT;
2092                 if (allow_cancellation && ext2fs_test_valid(fs) &&
2093                     (sb->s_state & EXT2_VALID_FS) &&
2094                     !(sb->s_state & EXT2_ERROR_FS))
2095                         exit_value = 0;
2096         } else
2097                 show_stats(ctx);
2098
2099         print_resource_track(ctx, NULL, &ctx->global_rtrack, ctx->fs->io);
2100
2101         ext2fs_close_free(&ctx->fs);
2102         free(ctx->journal_name);
2103
2104         if (ctx->logf)
2105                 fprintf(ctx->logf, "Exit status: %d\n", exit_value);
2106         e2fsck_free_context(ctx);
2107         remove_error_table(&et_ext2_error_table);
2108         remove_error_table(&et_prof_error_table);
2109         return exit_value;
2110 }