e2fsck/unix.c

   1 /*
   2  * unix.c - The unix-specific code for e2fsck
   3  *
   4  * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
   5  *
   6  * %Begin-Header%
   7  * This file may be redistributed under the terms of the GNU Public
   8  * License.
   9  * %End-Header%
  10  */
  11
  12 #define _XOPEN_SOURCE 600 /* for inclusion of sa_handler in Solaris */
  13
  14 #include "config.h"
  15 #include <stdio.h>
  16 #ifdef HAVE_STDLIB_H
  17 #include <stdlib.h>
  18 #endif
  19 #include <string.h>
  20 #include <fcntl.h>
  21 #include <ctype.h>
  22 #include <time.h>
  23 #ifdef HAVE_SIGNAL_H
  24 #include <signal.h>
  25 #endif
  26 #ifdef HAVE_GETOPT_H
  27 #include <getopt.h>
  28 #else
  29 extern char *optarg;
  30 extern int optind;
  31 #endif
  32 #include <unistd.h>
  33 #ifdef HAVE_ERRNO_H
  34 #include <errno.h>
  35 #endif
  36 #ifdef HAVE_SYS_IOCTL_H
  37 #include <sys/ioctl.h>
  38 #endif
  39 #ifdef HAVE_MALLOC_H
  40 #include <malloc.h>
  41 #endif
  42 #ifdef HAVE_SYS_TYPES_H
  43 #include <sys/types.h>
  44 #endif
  45 #ifdef HAVE_DIRENT_H
  46 #include <dirent.h>
  47 #endif
  48 #include <libgen.h>
  49
  50 #include "e2p/e2p.h"
  51 #include "et/com_err.h"
  52 #include "e2p/e2p.h"
  53 #include "uuid/uuid.h"
  54 #include "support/plausible.h"
  55 #include "e2fsck.h"
  56 #include "problem.h"
  57 #include "jfs_user.h"
  58 #include "../version.h"
  59
  60 /* Command line options */
  61 static int cflag;               /* check disk */
  62 static int show_version_only;
  63 static int verbose;
  64
  65 static int replace_bad_blocks;
  66 static int keep_bad_blocks;
  67 static char *bad_blocks_file;
  68
  69 e2fsck_t e2fsck_global_ctx;     /* Try your very best not to use this! */
  70
  71 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jbd-debug */
  72 int journal_enable_debug = -1;
  73 #endif
  74
  75 static void usage(e2fsck_t ctx)
  76 {
  77         fprintf(stderr,
  78                 _("Usage: %s [-pamnyrcdfktvDFV] [-b superblock] [-B blocksize]\n"
  79                 "\t\t[-l|-L bad_blocks_file] [-C fd] [-j external_journal]\n"
  80                 "\t\t[-E extended-options] [-z undo_file] device\n"),
  81                 ctx->program_name);
  82
  83         fprintf(stderr, "%s", _("\nEmergency help:\n"
  84                 " -p                   Automatic repair (no questions)\n"
  85 #ifdef HAVE_PTHREAD
  86                 " -m                   multiple threads to speedup fsck\n"
  87 #endif
  88                 " -n                   Make no changes to the filesystem\n"
  89                 " -y                   Assume \"yes\" to all questions\n"
  90                 " -c                   Check for bad blocks and add them to the badblock list\n"
  91                 " -f                   Force checking even if filesystem is marked clean\n"));
  92         fprintf(stderr, "%s", _(""
  93                 " -v                   Be verbose\n"
  94                 " -b superblock        Use alternative superblock\n"
  95                 " -B blocksize         Force blocksize when looking for superblock\n"
  96                 " -j external_journal  Set location of the external journal\n"
  97                 " -l bad_blocks_file   Add to badblocks list\n"
  98                 " -L bad_blocks_file   Set badblocks list\n"
  99                 " -z undo_file         Create an undo file\n"
 100                 ));
 101
 102         exit(FSCK_USAGE);
 103 }
 104
 105 static void show_stats(e2fsck_t ctx)
 106 {
 107         ext2_filsys fs = ctx->fs;
 108         ext2_ino_t inodes, inodes_used;
 109         blk64_t blocks, blocks_used;
 110         unsigned int dir_links;
 111         unsigned int num_files, num_links;
 112         __u32 *mask, m;
 113         int frag_percent_file = 0, frag_percent_dir = 0, frag_percent_total = 0;
 114         int i, j, printed = 0;
 115
 116         dir_links = 2 * ctx->fs_directory_count - 1;
 117         num_files = ctx->fs_total_count - dir_links;
 118         num_links = ctx->fs_links_count - dir_links;
 119         inodes = fs->super->s_inodes_count;
 120         inodes_used = (fs->super->s_inodes_count -
 121                        fs->super->s_free_inodes_count);
 122         blocks = ext2fs_blocks_count(fs->super);
 123         blocks_used = (ext2fs_blocks_count(fs->super) -
 124                        ext2fs_free_blocks_count(fs->super));
 125
 126         if (inodes_used > 0) {
 127                 frag_percent_file = (10000 * ctx->fs_fragmented) / inodes_used;
 128                 frag_percent_file = (frag_percent_file + 5) / 10;
 129
 130                 frag_percent_dir = (10000 * ctx->fs_fragmented_dir) / inodes_used;
 131                 frag_percent_dir = (frag_percent_dir + 5) / 10;
 132
 133                 frag_percent_total = ((10000 * (ctx->fs_fragmented +
 134                                                 ctx->fs_fragmented_dir))
 135                                       / inodes_used);
 136                 frag_percent_total = (frag_percent_total + 5) / 10;
 137         }
 138
 139         if (!verbose) {
 140                 log_out(ctx, _("%s: %u/%u files (%0d.%d%% non-contiguous), "
 141                                "%llu/%llu blocks\n"),
 142                         ctx->device_name, inodes_used, inodes,
 143                         frag_percent_total / 10, frag_percent_total % 10,
 144                         (unsigned long long) blocks_used,
 145                         (unsigned long long) blocks);
 146                 return;
 147         }
 148         profile_get_boolean(ctx->profile, "options", "report_features", 0, 0,
 149                             &i);
 150         if (verbose && i) {
 151                 log_out(ctx, "\nFilesystem features:");
 152                 mask = &ctx->fs->super->s_feature_compat;
 153                 for (i = 0; i < 3; i++, mask++) {
 154                         for (j = 0, m = 1; j < 32; j++, m <<= 1) {
 155                                 if (*mask & m) {
 156                                         log_out(ctx, " %s",
 157                                                 e2p_feature2string(i, m));
 158                                         printed++;
 159                                 }
 160                         }
 161                 }
 162                 if (printed == 0)
 163                         log_out(ctx, " (none)");
 164                 log_out(ctx, "\n");
 165         }
 166
 167         log_out(ctx, P_("\n%12u inode used (%2.2f%%, out of %u)\n",
 168                         "\n%12u inodes used (%2.2f%%, out of %u)\n",
 169                         inodes_used), inodes_used,
 170                 100.0 * inodes_used / inodes, inodes);
 171         log_out(ctx, P_("%12u non-contiguous file (%0d.%d%%)\n",
 172                         "%12u non-contiguous files (%0d.%d%%)\n",
 173                         ctx->fs_fragmented),
 174                 ctx->fs_fragmented, frag_percent_file / 10,
 175                 frag_percent_file % 10);
 176         log_out(ctx, P_("%12u non-contiguous directory (%0d.%d%%)\n",
 177                         "%12u non-contiguous directories (%0d.%d%%)\n",
 178                         ctx->fs_fragmented_dir),
 179                 ctx->fs_fragmented_dir, frag_percent_dir / 10,
 180                 frag_percent_dir % 10);
 181         log_out(ctx, _("             # of inodes with ind/dind/tind blocks: "
 182                        "%u/%u/%u\n"),
 183                 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
 184
 185         for (j=MAX_EXTENT_DEPTH_COUNT-1; j >=0; j--)
 186                 if (ctx->extent_depth_count[j])
 187                         break;
 188         if (++j) {
 189                 log_out(ctx, "%s", _("             Extent depth histogram: "));
 190                 for (i=0; i < j; i++) {
 191                         if (i)
 192                                 fputc('/', stdout);
 193                         log_out(ctx, "%u", ctx->extent_depth_count[i]);
 194                 }
 195                 log_out(ctx, "\n");
 196         }
 197
 198         log_out(ctx, P_("%12llu block used (%2.2f%%, out of %llu)\n",
 199                         "%12llu blocks used (%2.2f%%, out of %llu)\n",
 200                    blocks_used),
 201                 (unsigned long long) blocks_used, 100.0 * blocks_used / blocks,
 202                 (unsigned long long) blocks);
 203         log_out(ctx, P_("%12u bad block\n", "%12u bad blocks\n",
 204                         ctx->fs_badblocks_count), ctx->fs_badblocks_count);
 205         log_out(ctx, P_("%12u large file\n", "%12u large files\n",
 206                         ctx->large_files), ctx->large_files);
 207         log_out(ctx, P_("\n%12u regular file\n", "\n%12u regular files\n",
 208                         ctx->fs_regular_count), ctx->fs_regular_count);
 209         log_out(ctx, P_("%12u directory\n", "%12u directories\n",
 210                         ctx->fs_directory_count), ctx->fs_directory_count);
 211         log_out(ctx, P_("%12u character device file\n",
 212                         "%12u character device files\n", ctx->fs_chardev_count),
 213                 ctx->fs_chardev_count);
 214         log_out(ctx, P_("%12u block device file\n", "%12u block device files\n",
 215                         ctx->fs_blockdev_count), ctx->fs_blockdev_count);
 216         log_out(ctx, P_("%12u fifo\n", "%12u fifos\n", ctx->fs_fifo_count),
 217                 ctx->fs_fifo_count);
 218         log_out(ctx, P_("%12u link\n", "%12u links\n", num_links),
 219                 ctx->fs_links_count - dir_links);
 220         log_out(ctx, P_("%12u symbolic link", "%12u symbolic links",
 221                         ctx->fs_symlinks_count), ctx->fs_symlinks_count);
 222         log_out(ctx, P_(" (%u fast symbolic link)\n",
 223                         " (%u fast symbolic links)\n",
 224                         ctx->fs_fast_symlinks_count),
 225                 ctx->fs_fast_symlinks_count);
 226         log_out(ctx, P_("%12u socket\n", "%12u sockets\n",
 227                         ctx->fs_sockets_count),
 228                 ctx->fs_sockets_count);
 229         log_out(ctx, "------------\n");
 230         log_out(ctx, P_("%12u file\n", "%12u files\n", num_files),
 231                 num_files);
 232 }
 233
 234 static void check_mount(e2fsck_t ctx)
 235 {
 236         errcode_t       retval;
 237         int             cont;
 238
 239         retval = ext2fs_check_if_mounted(ctx->filesystem_name,
 240                                          &ctx->mount_flags);
 241         if (retval) {
 242                 com_err("ext2fs_check_if_mount", retval,
 243                         _("while determining whether %s is mounted."),
 244                         ctx->filesystem_name);
 245                 return;
 246         }
 247
 248         /*
 249          * If the filesystem isn't mounted, or it's the root
 250          * filesystem and it's mounted read-only, and we're not doing
 251          * a read/write check, then everything's fine.
 252          */
 253         if ((!(ctx->mount_flags & (EXT2_MF_MOUNTED | EXT2_MF_BUSY))) ||
 254             ((ctx->mount_flags & EXT2_MF_ISROOT) &&
 255              (ctx->mount_flags & EXT2_MF_READONLY) &&
 256              !(ctx->options & E2F_OPT_WRITECHECK)))
 257                 return;
 258
 259         if (((ctx->options & E2F_OPT_READONLY) ||
 260              ((ctx->options & E2F_OPT_FORCE) &&
 261               (ctx->mount_flags & EXT2_MF_READONLY))) &&
 262             !(ctx->options & E2F_OPT_WRITECHECK)) {
 263                 if (ctx->mount_flags & EXT2_MF_MOUNTED)
 264                         log_out(ctx, _("Warning!  %s is mounted.\n"),
 265                                         ctx->filesystem_name);
 266                 else
 267                         log_out(ctx, _("Warning!  %s is in use.\n"),
 268                                         ctx->filesystem_name);
 269                 return;
 270         }
 271
 272         if (ctx->mount_flags & EXT2_MF_MOUNTED)
 273                 log_out(ctx, _("%s is mounted.\n"), ctx->filesystem_name);
 274         else
 275                 log_out(ctx, _("%s is in use.\n"), ctx->filesystem_name);
 276         if (!ctx->interactive || ctx->mount_flags & EXT2_MF_BUSY)
 277                 fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
 278         puts("\007\007\007\007");
 279         log_out(ctx, "%s", _("\n\nWARNING!!!  "
 280                        "The filesystem is mounted.   "
 281                        "If you continue you ***WILL***\n"
 282                        "cause ***SEVERE*** filesystem damage.\n\n"));
 283         puts("\007\007\007");
 284         cont = ask_yn(ctx, _("Do you really want to continue"), 0);
 285         if (!cont) {
 286                 printf("%s", _("check aborted.\n"));
 287                 exit (0);
 288         }
 289         return;
 290 }
 291
 292 static int is_on_batt(void)
 293 {
 294         FILE    *f;
 295         DIR     *d;
 296         char    tmp[80], tmp2[80], fname[NAME_MAX+30];
 297         unsigned int    acflag;
 298         struct dirent*  de;
 299
 300         f = fopen("/sys/class/power_supply/AC/online", "r");
 301         if (f) {
 302                 if (fscanf(f, "%u\n", &acflag) == 1) {
 303                         fclose(f);
 304                         return (!acflag);
 305                 }
 306                 fclose(f);
 307         }
 308         f = fopen("/proc/apm", "r");
 309         if (f) {
 310                 if (fscanf(f, "%s %s %s %x", tmp, tmp, tmp, &acflag) != 4)
 311                         acflag = 1;
 312                 fclose(f);
 313                 return (acflag != 1);
 314         }
 315         d = opendir("/proc/acpi/ac_adapter");
 316         if (d) {
 317                 while ((de=readdir(d)) != NULL) {
 318                         if (!strncmp(".", de->d_name, 1))
 319                                 continue;
 320                         snprintf(fname, sizeof(fname),
 321                                  "/proc/acpi/ac_adapter/%s/state",
 322                                  de->d_name);
 323                         f = fopen(fname, "r");
 324                         if (!f)
 325                                 continue;
 326                         if (fscanf(f, "%s %s", tmp2, tmp) != 2)
 327                                 tmp[0] = 0;
 328                         fclose(f);
 329                         if (strncmp(tmp, "off-line", 8) == 0) {
 330                                 closedir(d);
 331                                 return 1;
 332                         }
 333                 }
 334                 closedir(d);
 335         }
 336         return 0;
 337 }
 338
 339 /*
 340  * This routine checks to see if a filesystem can be skipped; if so,
 341  * it will exit with E2FSCK_OK.  Under some conditions it will print a
 342  * message explaining why a check is being forced.
 343  */
 344 static void check_if_skip(e2fsck_t ctx)
 345 {
 346         ext2_filsys fs = ctx->fs;
 347         struct problem_context pctx;
 348         const char *reason = NULL;
 349         unsigned int reason_arg = 0;
 350         long next_check;
 351         int batt = is_on_batt();
 352         int defer_check_on_battery;
 353         int broken_system_clock;
 354         time_t lastcheck;
 355
 356         if (ctx->flags & E2F_FLAG_PROBLEMS_FIXED)
 357                 return;
 358
 359         profile_get_boolean(ctx->profile, "options", "broken_system_clock",
 360                             0, 0, &broken_system_clock);
 361         if (ctx->flags & E2F_FLAG_TIME_INSANE)
 362                 broken_system_clock = 1;
 363         profile_get_boolean(ctx->profile, "options",
 364                             "defer_check_on_battery", 0, 1,
 365                             &defer_check_on_battery);
 366         if (!defer_check_on_battery)
 367                 batt = 0;
 368
 369         if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file || cflag)
 370                 return;
 371
 372         if (ctx->options & E2F_OPT_JOURNAL_ONLY)
 373                 goto skip;
 374
 375         lastcheck = fs->super->s_lastcheck;
 376         if (lastcheck > ctx->now)
 377                 lastcheck -= ctx->time_fudge;
 378         if ((fs->super->s_state & EXT2_ERROR_FS) ||
 379             !ext2fs_test_valid(fs))
 380                 reason = _(" contains a file system with errors");
 381         else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
 382                 reason = _(" was not cleanly unmounted");
 383         else if (check_backup_super_block(ctx))
 384                 reason = _(" primary superblock features different from backup");
 385         else if ((fs->super->s_max_mnt_count > 0) &&
 386                  (fs->super->s_mnt_count >=
 387                   (unsigned) fs->super->s_max_mnt_count)) {
 388                 reason = _(" has been mounted %u times without being checked");
 389                 reason_arg = fs->super->s_mnt_count;
 390                 if (batt && (fs->super->s_mnt_count <
 391                              (unsigned) fs->super->s_max_mnt_count*2))
 392                         reason = 0;
 393         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 394                    (ctx->now < lastcheck)) {
 395                 reason = _(" has filesystem last checked time in the future");
 396                 if (batt)
 397                         reason = 0;
 398         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 399                    ((ctx->now - lastcheck) >=
 400                     ((time_t) fs->super->s_checkinterval))) {
 401                 reason = _(" has gone %u days without being checked");
 402                 reason_arg = (ctx->now - fs->super->s_lastcheck)/(3600*24);
 403                 if (batt && ((ctx->now - fs->super->s_lastcheck) <
 404                              fs->super->s_checkinterval*2))
 405                         reason = 0;
 406         } else if (broken_system_clock && fs->super->s_checkinterval) {
 407                 log_out(ctx, "%s: ", ctx->device_name);
 408                 log_out(ctx, "%s",
 409                         _("ignoring check interval, broken_system_clock set\n"));
 410         }
 411
 412         if (reason) {
 413                 log_out(ctx, "%s", ctx->device_name);
 414                 log_out(ctx, reason, reason_arg);
 415                 log_out(ctx, "%s", _(", check forced.\n"));
 416                 return;
 417         }
 418
 419         /*
 420          * Update the global counts from the block group counts.  This
 421          * is needed since modern kernels don't update the global
 422          * counts so as to avoid locking the entire file system.  So
 423          * if the filesystem is not unmounted cleanly, the global
 424          * counts may not be accurate.  Update them here if we can,
 425          * for the benefit of users who might examine the file system
 426          * using dumpe2fs.  (This is for cosmetic reasons only.)
 427          */
 428         clear_problem_context(&pctx);
 429         pctx.ino = fs->super->s_free_inodes_count;
 430         pctx.ino2 = ctx->free_inodes;
 431         if ((pctx.ino != pctx.ino2) &&
 432             !(ctx->options & E2F_OPT_READONLY) &&
 433             fix_problem(ctx, PR_0_FREE_INODE_COUNT, &pctx)) {
 434                 fs->super->s_free_inodes_count = ctx->free_inodes;
 435                 ext2fs_mark_super_dirty(fs);
 436         }
 437         clear_problem_context(&pctx);
 438         pctx.blk = ext2fs_free_blocks_count(fs->super);
 439         pctx.blk2 = ctx->free_blocks;
 440         if ((pctx.blk != pctx.blk2) &&
 441             !(ctx->options & E2F_OPT_READONLY) &&
 442             fix_problem(ctx, PR_0_FREE_BLOCK_COUNT, &pctx)) {
 443                 ext2fs_free_blocks_count_set(fs->super, ctx->free_blocks);
 444                 ext2fs_mark_super_dirty(fs);
 445         }
 446
 447         /* Print the summary message when we're skipping a full check */
 448         log_out(ctx, _("%s: clean, %u/%u files, %llu/%llu blocks"),
 449                 ctx->device_name,
 450                 fs->super->s_inodes_count - fs->super->s_free_inodes_count,
 451                 fs->super->s_inodes_count,
 452                 (unsigned long long) ext2fs_blocks_count(fs->super) -
 453                 ext2fs_free_blocks_count(fs->super),
 454                 (unsigned long long) ext2fs_blocks_count(fs->super));
 455         next_check = 100000;
 456         if (fs->super->s_max_mnt_count > 0) {
 457                 next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count;
 458                 if (next_check <= 0)
 459                         next_check = 1;
 460         }
 461         if (!broken_system_clock && fs->super->s_checkinterval &&
 462             ((ctx->now - fs->super->s_lastcheck) >= fs->super->s_checkinterval))
 463                 next_check = 1;
 464         if (next_check <= 5) {
 465                 if (next_check == 1) {
 466                         if (batt)
 467                                 log_out(ctx, "%s",
 468                                         _(" (check deferred; on battery)"));
 469                         else
 470                                 log_out(ctx, "%s",
 471                                         _(" (check after next mount)"));
 472                 } else
 473                         log_out(ctx, _(" (check in %ld mounts)"),
 474                                 next_check);
 475         }
 476         log_out(ctx, "\n");
 477 skip:
 478         ext2fs_close_free(&ctx->fs);
 479         e2fsck_free_context(ctx);
 480         exit(FSCK_OK);
 481 }
 482
 483 /*
 484  * For completion notice
 485  */
 486 struct percent_tbl {
 487         int     max_pass;
 488         int     table[32];
 489 };
 490 static struct percent_tbl e2fsck_tbl = {
 491         5, { 0, 70, 90, 92,  95, 100 }
 492 };
 493 static char bar[128], spaces[128];
 494
 495 static float calc_percent(struct percent_tbl *tbl, int pass, int curr,
 496                           int max)
 497 {
 498         float   percent;
 499
 500         if (pass <= 0)
 501                 return 0.0;
 502         if (pass > tbl->max_pass || max == 0)
 503                 return 100.0;
 504         percent = ((float) curr) / ((float) max);
 505         return ((percent * (tbl->table[pass] - tbl->table[pass-1]))
 506                 + tbl->table[pass-1]);
 507 }
 508
 509 void e2fsck_clear_progbar(e2fsck_t ctx)
 510 {
 511         if (!(ctx->flags & E2F_FLAG_PROG_BAR))
 512                 return;
 513
 514         printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80),
 515                ctx->stop_meta);
 516         fflush(stdout);
 517         ctx->flags &= ~E2F_FLAG_PROG_BAR;
 518 }
 519
 520 int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent,
 521                            unsigned int dpynum)
 522 {
 523         static const char spinner[] = "\\|/-";
 524         int     i;
 525         unsigned int    tick;
 526         struct timeval  tv;
 527         int dpywidth;
 528         int fixed_percent;
 529
 530         if (ctx->flags & E2F_FLAG_PROG_SUPPRESS)
 531                 return 0;
 532
 533         /*
 534          * Calculate the new progress position.  If the
 535          * percentage hasn't changed, then we skip out right
 536          * away.
 537          */
 538         fixed_percent = (int) ((10 * percent) + 0.5);
 539         if (ctx->progress_last_percent == fixed_percent)
 540                 return 0;
 541         ctx->progress_last_percent = fixed_percent;
 542
 543         /*
 544          * If we've already updated the spinner once within
 545          * the last 1/8th of a second, no point doing it
 546          * again.
 547          */
 548         gettimeofday(&tv, NULL);
 549         tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8));
 550         if ((tick == ctx->progress_last_time) &&
 551             (fixed_percent != 0) && (fixed_percent != 1000))
 552                 return 0;
 553         ctx->progress_last_time = tick;
 554
 555         /*
 556          * Advance the spinner, and note that the progress bar
 557          * will be on the screen
 558          */
 559         ctx->progress_pos = (ctx->progress_pos+1) & 3;
 560         ctx->flags |= E2F_FLAG_PROG_BAR;
 561
 562         dpywidth = 66 - strlen(label);
 563         dpywidth = 8 * (dpywidth / 8);
 564         if (dpynum)
 565                 dpywidth -= 8;
 566
 567         i = ((percent * dpywidth) + 50) / 100;
 568         printf("%s%s: |%s%s", ctx->start_meta, label,
 569                bar + (sizeof(bar) - (i+1)),
 570                spaces + (sizeof(spaces) - (dpywidth - i + 1)));
 571         if (fixed_percent == 1000)
 572                 fputc('|', stdout);
 573         else
 574                 fputc(spinner[ctx->progress_pos & 3], stdout);
 575         printf(" %4.1f%%  ", percent);
 576         if (dpynum)
 577                 printf("%u\r", dpynum);
 578         else
 579                 fputs(" \r", stdout);
 580         fputs(ctx->stop_meta, stdout);
 581
 582         if (fixed_percent == 1000)
 583                 e2fsck_clear_progbar(ctx);
 584         fflush(stdout);
 585
 586         return 0;
 587 }
 588
 589 static int e2fsck_update_progress(e2fsck_t ctx, int pass,
 590                                   unsigned long cur, unsigned long max)
 591 {
 592         char buf[1024];
 593         float percent;
 594
 595         if (pass == 0)
 596                 return 0;
 597
 598         if (ctx->progress_fd) {
 599                 snprintf(buf, sizeof(buf), "%d %lu %lu %s\n",
 600                          pass, cur, max, ctx->device_name);
 601                 write_all(ctx->progress_fd, buf, strlen(buf));
 602         } else {
 603                 percent = calc_percent(&e2fsck_tbl, pass, cur, max);
 604                 e2fsck_simple_progress(ctx, ctx->device_name,
 605                                        percent, 0);
 606         }
 607         return 0;
 608 }
 609
 610 #define PATH_SET "PATH=/sbin"
 611
 612 /*
 613  * Make sure 0,1,2 file descriptors are open, so that we don't open
 614  * the filesystem using the same file descriptor as stdout or stderr.
 615  */
 616 static void reserve_stdio_fds(void)
 617 {
 618         int     fd = 0;
 619
 620         while (fd <= 2) {
 621                 fd = open("/dev/null", O_RDWR);
 622                 if (fd < 0) {
 623                         fprintf(stderr, _("ERROR: Couldn't open "
 624                                 "/dev/null (%s)\n"),
 625                                 strerror(errno));
 626                         return;
 627                 }
 628         }
 629         (void) close(fd);
 630 }
 631
 632 #ifdef HAVE_SIGNAL_H
 633 static void signal_progress_on(int sig EXT2FS_ATTR((unused)))
 634 {
 635         e2fsck_t ctx = e2fsck_global_ctx;
 636
 637         if (!ctx)
 638                 return;
 639
 640         ctx->progress = e2fsck_update_progress;
 641 }
 642
 643 static void signal_progress_off(int sig EXT2FS_ATTR((unused)))
 644 {
 645         e2fsck_t ctx = e2fsck_global_ctx;
 646
 647         if (!ctx)
 648                 return;
 649
 650         e2fsck_clear_progbar(ctx);
 651         ctx->progress = 0;
 652 }
 653
 654 static void signal_cancel(int sig EXT2FS_ATTR((unused)))
 655 {
 656         e2fsck_t ctx = e2fsck_global_ctx;
 657
 658         if (!ctx)
 659                 exit(FSCK_CANCELED);
 660
 661         ctx->flags |= E2F_FLAG_CANCEL;
 662 }
 663 #endif
 664
 665 static void parse_extended_opts(e2fsck_t ctx, const char *opts)
 666 {
 667         char    *buf, *token, *next, *p, *arg;
 668         int     ea_ver;
 669         int     extended_usage = 0;
 670         unsigned long long reada_kb;
 671
 672         buf = string_copy(ctx, opts, 0);
 673         for (token = buf; token && *token; token = next) {
 674                 p = strchr(token, ',');
 675                 next = 0;
 676                 if (p) {
 677                         *p = 0;
 678                         next = p+1;
 679                 }
 680                 arg = strchr(token, '=');
 681                 if (arg) {
 682                         *arg = 0;
 683                         arg++;
 684                 }
 685                 if (strcmp(token, "ea_ver") == 0) {
 686                         if (!arg) {
 687                                 extended_usage++;
 688                                 continue;
 689                         }
 690                         ea_ver = strtoul(arg, &p, 0);
 691                         if (*p ||
 692                             ((ea_ver != 1) && (ea_ver != 2))) {
 693                                 fprintf(stderr, "%s",
 694                                         _("Invalid EA version.\n"));
 695                                 extended_usage++;
 696                                 continue;
 697                         }
 698                         ctx->ext_attr_ver = ea_ver;
 699                 } else if (strcmp(token, "readahead_kb") == 0) {
 700                         if (!arg) {
 701                                 extended_usage++;
 702                                 continue;
 703                         }
 704                         reada_kb = strtoull(arg, &p, 0);
 705                         if (*p) {
 706                                 fprintf(stderr, "%s",
 707                                         _("Invalid readahead buffer size.\n"));
 708                                 extended_usage++;
 709                                 continue;
 710                         }
 711                         ctx->readahead_kb = reada_kb;
 712                 } else if (strcmp(token, "fragcheck") == 0) {
 713                         ctx->options |= E2F_OPT_FRAGCHECK;
 714                         continue;
 715                 } else if (strcmp(token, "journal_only") == 0) {
 716                         if (arg) {
 717                                 extended_usage++;
 718                                 continue;
 719                         }
 720                         ctx->options |= E2F_OPT_JOURNAL_ONLY;
 721                 } else if (strcmp(token, "discard") == 0) {
 722                         ctx->options |= E2F_OPT_DISCARD;
 723                         continue;
 724                 } else if (strcmp(token, "nodiscard") == 0) {
 725                         ctx->options &= ~E2F_OPT_DISCARD;
 726                         continue;
 727                 } else if (strcmp(token, "optimize_extents") == 0) {
 728                         ctx->options &= ~E2F_OPT_NOOPT_EXTENTS;
 729                         continue;
 730                 } else if (strcmp(token, "no_optimize_extents") == 0) {
 731                         ctx->options |= E2F_OPT_NOOPT_EXTENTS;
 732                         continue;
 733                 } else if (strcmp(token, "inode_count_fullmap") == 0) {
 734                         ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
 735                         continue;
 736                 } else if (strcmp(token, "no_inode_count_fullmap") == 0) {
 737                         ctx->options &= ~E2F_OPT_ICOUNT_FULLMAP;
 738                         continue;
 739                 } else if (strcmp(token, "log_filename") == 0) {
 740                         if (!arg)
 741                                 extended_usage++;
 742                         else
 743                                 ctx->log_fn = string_copy(ctx, arg, 0);
 744                         continue;
 745                 } else if (strcmp(token, "problem_log") == 0) {
 746                         if (!arg)
 747                                 extended_usage++;
 748                         else
 749                                 ctx->problem_log_fn = string_copy(ctx, arg, 0);
 750                         continue;
 751                 } else if (strcmp(token, "bmap2extent") == 0) {
 752                         ctx->options |= E2F_OPT_CONVERT_BMAP;
 753                         continue;
 754                 } else if (strcmp(token, "fixes_only") == 0) {
 755                         ctx->options |= E2F_OPT_FIXES_ONLY;
 756                         continue;
 757                 } else if (strcmp(token, "unshare_blocks") == 0) {
 758                         ctx->options |= E2F_OPT_UNSHARE_BLOCKS;
 759                         ctx->options |= E2F_OPT_FORCE;
 760                         continue;
 761                 } else if (strcmp(token, "check_encoding") == 0) {
 762                         ctx->options |= E2F_OPT_CHECK_ENCODING;
 763                         continue;
 764 #ifdef CONFIG_DEVELOPER_FEATURES
 765                 } else if (strcmp(token, "clear_all_uninit_bits") == 0) {
 766                         ctx->options |= E2F_OPT_CLEAR_UNINIT;
 767                         continue;
 768 #endif
 769                 } else {
 770                         fprintf(stderr, _("Unknown extended option: %s\n"),
 771                                 token);
 772                         extended_usage++;
 773                 }
 774         }
 775         free(buf);
 776
 777         if (extended_usage) {
 778                 fputs(_("\nExtended options are separated by commas, "
 779                        "and may take an argument which\n"
 780                        "is set off by an equals ('=') sign.  "
 781                        "Valid extended options are:\n\n"), stderr);
 782                 fputs(_("\tea_ver=<ea_version (1 or 2)>\n"), stderr);
 783                 fputs("\tfragcheck\n", stderr);
 784                 fputs("\tjournal_only\n", stderr);
 785                 fputs("\tdiscard\n", stderr);
 786                 fputs("\tnodiscard\n", stderr);
 787                 fputs("\toptimize_extents\n", stderr);
 788                 fputs("\tno_optimize_extents\n", stderr);
 789                 fputs("\tinode_count_fullmap\n", stderr);
 790                 fputs("\tno_inode_count_fullmap\n", stderr);
 791                 fputs(_("\treadahead_kb=<buffer size>\n"), stderr);
 792                 fputs("\tbmap2extent\n", stderr);
 793                 fputs("\tunshare_blocks\n", stderr);
 794                 fputs("\tfixes_only\n", stderr);
 795                 fputs("\tcheck_encoding\n", stderr);
 796                 fputc('\n', stderr);
 797                 exit(1);
 798         }
 799 }
 800
 801 static void syntax_err_report(const char *filename, long err, int line_num)
 802 {
 803         fprintf(stderr,
 804                 _("Syntax error in e2fsck config file (%s, line #%d)\n\t%s\n"),
 805                 filename, line_num, error_message(err));
 806         exit(FSCK_ERROR);
 807 }
 808
 809 static const char *config_fn[] = { ROOT_SYSCONFDIR "/e2fsck.conf", 0 };
 810
 811 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 812 {
 813         int             flush = 0;
 814         int             c, fd;
 815 #ifdef MTRACE
 816         extern void     *mallwatch;
 817 #endif
 818         e2fsck_t        ctx;
 819         errcode_t       retval;
 820 #ifdef HAVE_SIGNAL_H
 821         struct sigaction        sa;
 822 #endif
 823         char            *extended_opts = 0;
 824         char            *cp;
 825         int             res;            /* result of sscanf */
 826 #ifdef CONFIG_JBD_DEBUG
 827         char            *jbd_debug;
 828 #endif
 829 #ifdef HAVE_PTHREAD
 830         char            *pm;
 831         unsigned long   thread_num;
 832 #endif
 833         unsigned long long phys_mem_kb, blk;
 834
 835         retval = e2fsck_allocate_context(&ctx);
 836         if (retval)
 837                 return retval;
 838
 839         *ret_ctx = ctx;
 840         e2fsck_global_ctx = ctx;
 841
 842         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
 843         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
 844         if (getenv("E2FSCK_FORCE_INTERACTIVE") || (isatty(0) && isatty(1))) {
 845                 ctx->interactive = 1;
 846         } else {
 847                 ctx->start_meta[0] = '\001';
 848                 ctx->stop_meta[0] = '\002';
 849         }
 850         memset(bar, '=', sizeof(bar)-1);
 851         memset(spaces, ' ', sizeof(spaces)-1);
 852         add_error_table(&et_ext2_error_table);
 853         add_error_table(&et_prof_error_table);
 854         blkid_get_cache(&ctx->blkid, NULL);
 855
 856         if (argc && *argv)
 857                 ctx->program_name = *argv;
 858         else
 859                 ctx->program_name = "e2fsck";
 860
 861         phys_mem_kb = get_memory_size() / 1024;
 862         ctx->readahead_kb = ~0ULL;
 863
 864 #ifdef HAVE_PTHREAD
 865         while ((c = getopt(argc, argv, "pam:nyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDkz:")) != EOF)
 866 #else
 867         while ((c = getopt(argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDkz:")) != EOF)
 868 #endif
 869                 switch (c) {
 870                 case 'C':
 871                         ctx->progress = e2fsck_update_progress;
 872                         res = sscanf(optarg, "%d", &ctx->progress_fd);
 873                         if (res != 1)
 874                                 goto sscanf_err;
 875
 876                         if (ctx->progress_fd < 0) {
 877                                 ctx->progress = 0;
 878                                 ctx->progress_fd = ctx->progress_fd * -1;
 879                         }
 880                         if (!ctx->progress_fd)
 881                                 break;
 882                         /* Validate the file descriptor to avoid disasters */
 883                         fd = dup(ctx->progress_fd);
 884                         if (fd < 0) {
 885                                 fprintf(stderr,
 886                                 _("Error validating file descriptor %d: %s\n"),
 887                                         ctx->progress_fd,
 888                                         error_message(errno));
 889                                 fatal_error(ctx,
 890                         _("Invalid completion information file descriptor"));
 891                         } else
 892                                 close(fd);
 893                         break;
 894                 case 'D':
 895                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 896                         break;
 897                 case 'E':
 898                         extended_opts = optarg;
 899                         break;
 900                 case 'p':
 901                 case 'a':
 902                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
 903                         conflict_opt:
 904                                 fatal_error(ctx,
 905         _("Only one of the options -p/-a, -n or -y may be specified."));
 906                         }
 907                         ctx->options |= E2F_OPT_PREEN;
 908                         break;
 909 #ifdef HAVE_PTHREAD
 910                 case 'm':
 911                         thread_num = strtoul(optarg, &pm, 0);
 912                         if (*pm)
 913                                 fatal_error(ctx,
 914                                         _("Invalid multiple thread num.\n"));
 915                         if (thread_num > E2FSCK_MAX_THREADS) {
 916                                 fprintf(stderr,
 917                                         _("threads %lu too large (max %lu)\n"),
 918                                         thread_num, E2FSCK_MAX_THREADS);
 919                                 fatal_error(ctx, 0);
 920                         }
 921                         ctx->options |= E2F_OPT_MULTITHREAD;
 922                         ctx->fs_num_threads = thread_num;
 923                         break;
 924 #endif
 925                 case 'n':
 926                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
 927                                 goto conflict_opt;
 928                         ctx->options |= E2F_OPT_NO;
 929                         break;
 930                 case 'y':
 931                         if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
 932                                 goto conflict_opt;
 933                         ctx->options |= E2F_OPT_YES;
 934                         break;
 935                 case 't':
 936 #ifdef RESOURCE_TRACK
 937                         if (ctx->options & E2F_OPT_TIME)
 938                                 ctx->options |= E2F_OPT_TIME2;
 939                         else
 940                                 ctx->options |= E2F_OPT_TIME;
 941 #else
 942                         fprintf(stderr, _("The -t option is not "
 943                                 "supported on this version of e2fsck.\n"));
 944 #endif
 945                         break;
 946                 case 'c':
 947                         if (cflag++)
 948                                 ctx->options |= E2F_OPT_WRITECHECK;
 949                         ctx->options |= E2F_OPT_CHECKBLOCKS;
 950                         break;
 951                 case 'r':
 952                         /* What we do by default, anyway! */
 953                         break;
 954                 case 'b':
 955                         res = sscanf(optarg, "%llu", &blk);
 956                         ctx->use_superblock = blk;
 957                         if (res != 1)
 958                                 goto sscanf_err;
 959                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
 960                         break;
 961                 case 'B':
 962                         ctx->blocksize = atoi(optarg);
 963                         break;
 964                 case 'I':
 965                         res = sscanf(optarg, "%d", &ctx->inode_buffer_blocks);
 966                         if (res != 1)
 967                                 goto sscanf_err;
 968                         break;
 969                 case 'j':
 970                         ctx->journal_name = blkid_get_devname(ctx->blkid,
 971                                                               optarg, NULL);
 972                         if (!ctx->journal_name) {
 973                                 com_err(ctx->program_name, 0,
 974                                         _("Unable to resolve '%s'"),
 975                                         optarg);
 976                                 fatal_error(ctx, 0);
 977                         }
 978                         break;
 979                 case 'P':
 980                         res = sscanf(optarg, "%d", &ctx->process_inode_size);
 981                         if (res != 1)
 982                                 goto sscanf_err;
 983                         break;
 984                 case 'L':
 985                         replace_bad_blocks++;
 986                         /* fall through */
 987                 case 'l':
 988                         if (bad_blocks_file)
 989                                 free(bad_blocks_file);
 990                         bad_blocks_file = string_copy(ctx, optarg, 0);
 991                         break;
 992                 case 'd':
 993                         ctx->options |= E2F_OPT_DEBUG;
 994                         break;
 995                 case 'f':
 996                         ctx->options |= E2F_OPT_FORCE;
 997                         break;
 998                 case 'F':
 999                         flush = 1;
1000                         break;
1001                 case 'v':
1002                         verbose = 1;
1003                         break;
1004                 case 'V':
1005                         show_version_only = 1;
1006                         break;
1007 #ifdef MTRACE
1008                 case 'M':
1009                         mallwatch = (void *) strtol(optarg, NULL, 0);
1010                         break;
1011 #endif
1012                 case 'N':
1013                         ctx->device_name = string_copy(ctx, optarg, 0);
1014                         break;
1015                 case 'k':
1016                         keep_bad_blocks++;
1017                         break;
1018                 case 'z':
1019                         ctx->undo_file = optarg;
1020                         break;
1021                 default:
1022                         usage(ctx);
1023                 }
1024         if (show_version_only)
1025                 return 0;
1026         if (optind != argc - 1)
1027                 usage(ctx);
1028         if ((ctx->options & E2F_OPT_NO) &&
1029             (ctx->options & E2F_OPT_COMPRESS_DIRS)) {
1030                 com_err(ctx->program_name, 0, "%s",
1031                         _("The -n and -D options are incompatible."));
1032                 fatal_error(ctx, 0);
1033         }
1034         if ((ctx->options & E2F_OPT_NO) && cflag) {
1035                 com_err(ctx->program_name, 0, "%s",
1036                         _("The -n and -c options are incompatible."));
1037                 fatal_error(ctx, 0);
1038         }
1039         if ((ctx->options & E2F_OPT_NO) && bad_blocks_file) {
1040                 com_err(ctx->program_name, 0, "%s",
1041                         _("The -n and -l/-L options are incompatible."));
1042                 fatal_error(ctx, 0);
1043         }
1044 #ifdef HAVE_PTHREAD
1045         if (ctx->options & E2F_OPT_MULTITHREAD) {
1046                 if ((ctx->options & (E2F_OPT_YES|E2F_OPT_NO|E2F_OPT_PREEN)) == 0) {
1047                         com_err(ctx->program_name, 0, "%s",
1048                                 _("The -m option should be used together with one of -p/-y/-n options."));
1049                         fatal_error(ctx, 0);
1050                 }
1051                 if (ctx->progress) {
1052                         com_err(ctx->program_name, 0, "%s",
1053                                 _("Only one of the options -C or -m may be specified."));
1054                         fatal_error(ctx, 0);
1055                 }
1056         }
1057 #endif
1058         if (ctx->options & E2F_OPT_NO)
1059                 ctx->options |= E2F_OPT_READONLY;
1060
1061         ctx->io_options = strchr(argv[optind], '?');
1062         if (ctx->io_options)
1063                 *ctx->io_options++ = 0;
1064         ctx->filesystem_name = blkid_get_devname(ctx->blkid, argv[optind], 0);
1065         if (!ctx->filesystem_name) {
1066                 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
1067                         argv[optind]);
1068                 fatal_error(ctx, 0);
1069         }
1070         if (extended_opts)
1071                 parse_extended_opts(ctx, extended_opts);
1072
1073         /* Complain about mutually exclusive rebuilding activities */
1074         if (getenv("E2FSCK_FIXES_ONLY"))
1075                 ctx->options |= E2F_OPT_FIXES_ONLY;
1076         if ((ctx->options & E2F_OPT_COMPRESS_DIRS) &&
1077             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1078                 com_err(ctx->program_name, 0, "%s",
1079                         _("The -D and -E fixes_only options are incompatible."));
1080                 fatal_error(ctx, 0);
1081         }
1082         if ((ctx->options & E2F_OPT_CONVERT_BMAP) &&
1083             (ctx->options & E2F_OPT_FIXES_ONLY)) {
1084                 com_err(ctx->program_name, 0, "%s",
1085                         _("The -E bmap2extent and fixes_only options are incompatible."));
1086                 fatal_error(ctx, 0);
1087         }
1088
1089         if ((cp = getenv("E2FSCK_CONFIG")) != NULL)
1090                 config_fn[0] = cp;
1091         profile_set_syntax_err_cb(syntax_err_report);
1092         profile_init(config_fn, &ctx->profile);
1093
1094         profile_get_boolean(ctx->profile, "options", "report_time", 0, 0,
1095                             &c);
1096         if (c)
1097                 ctx->options |= E2F_OPT_TIME | E2F_OPT_TIME2;
1098         profile_get_boolean(ctx->profile, "options", "report_verbose", 0, 0,
1099                             &c);
1100         if (c)
1101                 verbose = 1;
1102
1103         profile_get_boolean(ctx->profile, "options", "no_optimize_extents",
1104                             0, 0, &c);
1105         if (c)
1106                 ctx->options |= E2F_OPT_NOOPT_EXTENTS;
1107
1108         profile_get_boolean(ctx->profile, "options", "inode_count_fullmap",
1109                             0, 0, &c);
1110         if (c)
1111                 ctx->options |= E2F_OPT_ICOUNT_FULLMAP;
1112
1113         if (ctx->readahead_kb == ~0ULL) {
1114                 profile_get_integer(ctx->profile, "options",
1115                                     "readahead_mem_pct", 0, -1, &c);
1116                 if (c >= 0 && c <= 100)
1117                         ctx->readahead_kb = phys_mem_kb * c / 100;
1118                 profile_get_integer(ctx->profile, "options",
1119                                     "readahead_kb", 0, -1, &c);
1120                 if (c >= 0)
1121                         ctx->readahead_kb = c;
1122                 if (ctx->readahead_kb != ~0ULL &&
1123                     ctx->readahead_kb > phys_mem_kb)
1124                         ctx->readahead_kb = phys_mem_kb;
1125         }
1126
1127         /* Turn off discard in read-only mode */
1128         if ((ctx->options & E2F_OPT_NO) &&
1129             (ctx->options & E2F_OPT_DISCARD))
1130                 ctx->options &= ~E2F_OPT_DISCARD;
1131
1132         if (flush) {
1133                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
1134                 if (fd < 0) {
1135                         com_err("open", errno,
1136                                 _("while opening %s for flushing"),
1137                                 ctx->filesystem_name);
1138                         fatal_error(ctx, 0);
1139                 }
1140                 if ((retval = ext2fs_sync_device(fd, 1))) {
1141                         com_err("ext2fs_sync_device", retval,
1142                                 _("while trying to flush %s"),
1143                                 ctx->filesystem_name);
1144                         fatal_error(ctx, 0);
1145                 }
1146                 close(fd);
1147         }
1148         if (cflag && bad_blocks_file) {
1149                 fprintf(stderr, "%s", _("The -c and the -l/-L options may not "
1150                                         "be both used at the same time.\n"));
1151                 exit(FSCK_USAGE);
1152         }
1153 #ifdef HAVE_SIGNAL_H
1154         /*
1155          * Set up signal action
1156          */
1157         memset(&sa, 0, sizeof(struct sigaction));
1158         sa.sa_handler = signal_cancel;
1159         sigaction(SIGINT, &sa, 0);
1160         sigaction(SIGTERM, &sa, 0);
1161 #ifdef SA_RESTART
1162         sa.sa_flags = SA_RESTART;
1163 #endif
1164         if ((ctx->options & E2F_OPT_MULTITHREAD) == 0) {
1165                 sa.sa_handler = signal_progress_on;
1166                 sigaction(SIGUSR1, &sa, 0);
1167                 sa.sa_handler = signal_progress_off;
1168                 sigaction(SIGUSR2, &sa, 0);
1169         }
1170 #endif
1171
1172         /* Update our PATH to include /sbin if we need to run badblocks  */
1173         if (cflag) {
1174                 char *oldpath = getenv("PATH");
1175                 char *newpath;
1176                 int len = sizeof(PATH_SET) + 1;
1177
1178                 if (oldpath)
1179                         len += strlen(oldpath);
1180
1181                 newpath = malloc(len);
1182                 if (!newpath)
1183                         fatal_error(ctx, "Couldn't malloc() newpath");
1184                 strcpy(newpath, PATH_SET);
1185
1186                 if (oldpath) {
1187                         strcat(newpath, ":");
1188                         strcat(newpath, oldpath);
1189                 }
1190                 putenv(newpath);
1191         }
1192 #ifdef CONFIG_JBD_DEBUG
1193         jbd_debug = getenv("E2FSCK_JBD_DEBUG");
1194         if (jbd_debug) {
1195                 res = sscanf(jbd_debug, "%d", &journal_enable_debug);
1196                 if (res != 1) {
1197                         fprintf(stderr,
1198                                 _("E2FSCK_JBD_DEBUG \"%s\" not an integer\n\n"),
1199                                 jbd_debug);
1200                         exit (1);
1201                 }
1202         }
1203 #endif
1204         return 0;
1205
1206 sscanf_err:
1207         fprintf(stderr, _("\nInvalid non-numeric argument to -%c (\"%s\")\n\n"),
1208                 c, optarg);
1209         exit (1);
1210 }
1211
1212 static errcode_t try_open_fs(e2fsck_t ctx, int flags, io_manager io_ptr,
1213                              ext2_filsys *ret_fs)
1214 {
1215         errcode_t retval;
1216
1217         *ret_fs = NULL;
1218         if (ctx->superblock && ctx->blocksize) {
1219                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1220                                       flags, ctx->superblock, ctx->blocksize,
1221                                       io_ptr, ret_fs);
1222         } else if (ctx->superblock) {
1223                 int blocksize;
1224                 for (blocksize = EXT2_MIN_BLOCK_SIZE;
1225                      blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
1226                         if (*ret_fs) {
1227                                 ext2fs_free(*ret_fs);
1228                                 *ret_fs = NULL;
1229                         }
1230                         retval = ext2fs_open2(ctx->filesystem_name,
1231                                               ctx->io_options, flags,
1232                                               ctx->superblock, blocksize,
1233                                               io_ptr, ret_fs);
1234                         if (!retval)
1235                                 break;
1236                 }
1237         } else
1238                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
1239                                       flags, 0, 0, io_ptr, ret_fs);
1240
1241         if (retval == 0) {
1242                 (*ret_fs)->priv_data = ctx;
1243                 e2fsck_set_bitmap_type(*ret_fs, EXT2FS_BMAP64_RBTREE,
1244                                        "default", NULL);
1245         }
1246         return retval;
1247 }
1248
1249 static const char *my_ver_string = E2FSPROGS_VERSION;
1250 static const char *my_ver_date = E2FSPROGS_DATE;
1251
1252 static errcode_t e2fsck_check_mmp(ext2_filsys fs, e2fsck_t ctx)
1253 {
1254         struct mmp_struct *mmp_s;
1255         unsigned int mmp_check_interval;
1256         errcode_t retval = 0;
1257         struct problem_context pctx;
1258         unsigned int wait_time = 0;
1259
1260         clear_problem_context(&pctx);
1261         if (fs->mmp_buf == NULL) {
1262                 retval = ext2fs_get_mem(fs->blocksize, &fs->mmp_buf);
1263                 if (retval)
1264                         goto check_error;
1265         }
1266
1267         retval = ext2fs_mmp_read(fs, fs->super->s_mmp_block, fs->mmp_buf);
1268         if (retval)
1269                 goto check_error;
1270
1271         mmp_s = fs->mmp_buf;
1272
1273         mmp_check_interval = fs->super->s_mmp_update_interval;
1274         if (mmp_check_interval < EXT4_MMP_MIN_CHECK_INTERVAL)
1275                 mmp_check_interval = EXT4_MMP_MIN_CHECK_INTERVAL;
1276
1277         /*
1278          * If check_interval in MMP block is larger, use that instead of
1279          * check_interval from the superblock.
1280          */
1281         if (mmp_s->mmp_check_interval > mmp_check_interval)
1282                 mmp_check_interval = mmp_s->mmp_check_interval;
1283
1284         wait_time = mmp_check_interval * 2 + 1;
1285
1286         if (mmp_s->mmp_seq == EXT4_MMP_SEQ_CLEAN)
1287                 retval = 0;
1288         else if (mmp_s->mmp_seq == EXT4_MMP_SEQ_FSCK)
1289                 retval = EXT2_ET_MMP_FSCK_ON;
1290         else if (mmp_s->mmp_seq > EXT4_MMP_SEQ_MAX)
1291                 retval = EXT2_ET_MMP_UNKNOWN_SEQ;
1292
1293         if (retval)
1294                 goto check_error;
1295
1296         /* Print warning if e2fsck will wait for more than 20 secs. */
1297         if (verbose || wait_time > EXT4_MMP_MIN_CHECK_INTERVAL * 4) {
1298                 log_out(ctx, _("MMP interval is %u seconds and total wait "
1299                                "time is %u seconds. Please wait...\n"),
1300                         mmp_check_interval, wait_time * 2);
1301         }
1302
1303         return 0;
1304
1305 check_error:
1306
1307         if (retval == EXT2_ET_MMP_BAD_BLOCK) {
1308                 if (fix_problem(ctx, PR_0_MMP_INVALID_BLK, &pctx)) {
1309                         fs->super->s_mmp_block = 0;
1310                         ext2fs_mark_super_dirty(fs);
1311                         retval = 0;
1312                 }
1313         } else if (retval == EXT2_ET_MMP_FAILED) {
1314                 com_err(ctx->program_name, retval, "%s",
1315                         _("while checking MMP block"));
1316                 dump_mmp_msg(fs->mmp_buf, NULL);
1317         } else if (retval == EXT2_ET_MMP_FSCK_ON ||
1318                    retval == EXT2_ET_MMP_UNKNOWN_SEQ) {
1319                 com_err(ctx->program_name, retval, "%s",
1320                         _("while checking MMP block"));
1321                 dump_mmp_msg(fs->mmp_buf,
1322                              _("If you are sure the filesystem is not "
1323                                "in use on any node, run:\n"
1324                                "'tune2fs -f -E clear_mmp %s'\n"),
1325                              ctx->device_name);
1326         } else if (retval == EXT2_ET_MMP_MAGIC_INVALID) {
1327                 if (fix_problem(ctx, PR_0_MMP_INVALID_MAGIC, &pctx)) {
1328                         ext2fs_mmp_clear(fs);
1329                         retval = 0;
1330                 }
1331         } else if (retval == EXT2_ET_MMP_CSUM_INVALID) {
1332                 if (fix_problem(ctx, PR_0_MMP_CSUM_INVALID, &pctx)) {
1333                         ext2fs_mmp_clear(fs);
1334                         retval = 0;
1335                 }
1336         } else
1337                 com_err(ctx->program_name, retval, "%s",
1338                         _("while reading MMP block"));
1339         return retval;
1340 }
1341
1342 static int e2fsck_setup_tdb(e2fsck_t ctx, io_manager *io_ptr)
1343 {
1344         errcode_t retval = ENOMEM;
1345         char *tdb_dir = NULL, *tdb_file = NULL;
1346         char *dev_name, *tmp_name;
1347         int free_tdb_dir = 0;
1348
1349         /* (re)open a specific undo file */
1350         if (ctx->undo_file && ctx->undo_file[0] != 0) {
1351                 retval = set_undo_io_backing_manager(*io_ptr);
1352                 if (retval)
1353                         goto err;
1354                 *io_ptr = undo_io_manager;
1355                 retval = set_undo_io_backup_file(ctx->undo_file);
1356                 if (retval)
1357                         goto err;
1358                 printf(_("Overwriting existing filesystem; this can be undone "
1359                          "using the command:\n"
1360                          "    e2undo %s %s\n\n"),
1361                         ctx->undo_file, ctx->filesystem_name);
1362                 return retval;
1363         }
1364
1365         /*
1366          * Configuration via a conf file would be
1367          * nice
1368          */
1369         tdb_dir = getenv("E2FSPROGS_UNDO_DIR");
1370         if (!tdb_dir) {
1371                 profile_get_string(ctx->profile, "defaults",
1372                                    "undo_dir", 0, "/var/lib/e2fsprogs",
1373                                    &tdb_dir);
1374                 free_tdb_dir = 1;
1375         }
1376
1377         if (!strcmp(tdb_dir, "none") || (tdb_dir[0] == 0) ||
1378             access(tdb_dir, W_OK)) {
1379                 if (free_tdb_dir)
1380                         free(tdb_dir);
1381                 return 0;
1382         }
1383
1384         tmp_name = strdup(ctx->filesystem_name);
1385         if (!tmp_name)
1386                 goto errout;
1387         dev_name = basename(tmp_name);
1388         tdb_file = malloc(strlen(tdb_dir) + 8 + strlen(dev_name) + 7 + 1);
1389         if (!tdb_file) {
1390                 free(tmp_name);
1391                 goto errout;
1392         }
1393         sprintf(tdb_file, "%s/e2fsck-%s.e2undo", tdb_dir, dev_name);
1394         free(tmp_name);
1395
1396         if ((unlink(tdb_file) < 0) && (errno != ENOENT)) {
1397                 retval = errno;
1398                 com_err(ctx->program_name, retval,
1399                         _("while trying to delete %s"), tdb_file);
1400                 goto errout;
1401         }
1402
1403         retval = set_undo_io_backing_manager(*io_ptr);
1404         if (retval)
1405                 goto errout;
1406         *io_ptr = undo_io_manager;
1407         retval = set_undo_io_backup_file(tdb_file);
1408         if (retval)
1409                 goto errout;
1410         printf(_("Overwriting existing filesystem; this can be undone "
1411                  "using the command:\n"
1412                  "    e2undo %s %s\n\n"), tdb_file, ctx->filesystem_name);
1413
1414         if (free_tdb_dir)
1415                 free(tdb_dir);
1416         free(tdb_file);
1417         return 0;
1418
1419 errout:
1420         if (free_tdb_dir)
1421                 free(tdb_dir);
1422         free(tdb_file);
1423 err:
1424         com_err(ctx->program_name, retval, "%s",
1425                 _("while trying to setup undo file\n"));
1426         return retval;
1427 }
1428
1429 int main (int argc, char *argv[])
1430 {
1431         errcode_t       retval = 0, retval2 = 0, orig_retval = 0;
1432         int             exit_value = FSCK_OK;
1433         ext2_filsys     fs = 0;
1434         io_manager      io_ptr;
1435         struct ext2_super_block *sb;
1436         const char      *lib_ver_date;
1437         int             my_ver, lib_ver;
1438         e2fsck_t        ctx;
1439         blk64_t         orig_superblock = ~(blk64_t)0;
1440         struct problem_context pctx;
1441         int flags, run_result, was_changed;
1442         int journal_size;
1443         int sysval, sys_page_size = 4096;
1444         int old_bitmaps;
1445         __u32 features[3];
1446         char *cp;
1447         enum quota_type qtype;
1448         struct ext2fs_journal_params jparams;
1449
1450         clear_problem_context(&pctx);
1451         sigcatcher_setup();
1452 #ifdef MTRACE
1453         mtrace();
1454 #endif
1455 #ifdef MCHECK
1456         mcheck(0);
1457 #endif
1458 #ifdef ENABLE_NLS
1459         setlocale(LC_MESSAGES, "");
1460         setlocale(LC_CTYPE, "");
1461         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
1462         textdomain(NLS_CAT_NAME);
1463         set_com_err_gettext(gettext);
1464 #endif
1465         my_ver = ext2fs_parse_version_string(my_ver_string);
1466         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
1467         if (my_ver > lib_ver) {
1468                 fprintf( stderr, "%s",
1469                          _("Error: ext2fs library version out of date!\n"));
1470                 show_version_only++;
1471         }
1472
1473         retval = PRS(argc, argv, &ctx);
1474         if (retval) {
1475                 com_err("e2fsck", retval, "%s",
1476                         _("while trying to initialize program"));
1477                 exit(FSCK_ERROR);
1478         }
1479         reserve_stdio_fds();
1480
1481         ctx->global_ctx = NULL;
1482         set_up_logging(ctx);
1483         if (ctx->logf) {
1484                 int i;
1485
1486                 fputs("E2fsck run: ", ctx->logf);
1487                 for (i = 0; i < argc; i++) {
1488                         if (i)
1489                                 fputc(' ', ctx->logf);
1490                         fputs(argv[i], ctx->logf);
1491                 }
1492                 fputc('\n', ctx->logf);
1493         }
1494         if (ctx->problem_logf) {
1495                 int i;
1496
1497                 fputs("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n",
1498                       ctx->problem_logf);
1499                 fprintf(ctx->problem_logf, "<problem_log time=\"%lu\">\n",
1500                         (unsigned long) ctx->now);
1501                 fprintf(ctx->problem_logf, "<invocation prog=\"%s\"",
1502                         argv[0]);
1503                 for (i = 1; i < argc; i++)
1504                         fprintf(ctx->problem_logf, " arg%d=\"%s\"", i, argv[i]);
1505                 fputs("/>\n", ctx->problem_logf);
1506         }
1507
1508         init_resource_track(&ctx->global_rtrack, NULL);
1509         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
1510                 log_err(ctx, "e2fsck %s (%s)\n", my_ver_string,
1511                          my_ver_date);
1512
1513         if (show_version_only) {
1514                 log_err(ctx, _("\tUsing %s, %s\n"),
1515                         error_message(EXT2_ET_BASE), lib_ver_date);
1516                 exit(FSCK_OK);
1517         }
1518
1519         check_mount(ctx);
1520
1521         if (!(ctx->options & E2F_OPT_PREEN) &&
1522             !(ctx->options & E2F_OPT_NO) &&
1523             !(ctx->options & E2F_OPT_YES)) {
1524                 if (!ctx->interactive)
1525                         fatal_error(ctx,
1526                                     _("need terminal for interactive repairs"));
1527         }
1528         ctx->superblock = ctx->use_superblock;
1529
1530         flags = EXT2_FLAG_SKIP_MMP | EXT2_FLAG_THREADS;
1531 restart:
1532 #ifdef CONFIG_TESTIO_DEBUG
1533         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1534                 io_ptr = test_io_manager;
1535                 test_io_backing_manager = unix_io_manager;
1536         } else
1537 #endif
1538                 io_ptr = unix_io_manager;
1539         flags |= EXT2_FLAG_NOFREE_ON_ERROR;
1540         profile_get_boolean(ctx->profile, "options", "old_bitmaps", 0, 0,
1541                             &old_bitmaps);
1542         if (!old_bitmaps)
1543                 flags |= EXT2_FLAG_64BITS;
1544         if ((ctx->options & E2F_OPT_READONLY) == 0) {
1545                 flags |= EXT2_FLAG_RW;
1546                 if (!(ctx->mount_flags & EXT2_MF_ISROOT &&
1547                       ctx->mount_flags & EXT2_MF_READONLY))
1548                         flags |= EXT2_FLAG_EXCLUSIVE;
1549                 if ((ctx->mount_flags & EXT2_MF_READONLY) &&
1550                     (ctx->options & E2F_OPT_FORCE))
1551                         flags &= ~EXT2_FLAG_EXCLUSIVE;
1552         }
1553
1554         if (ctx->undo_file) {
1555                 retval = e2fsck_setup_tdb(ctx, &io_ptr);
1556                 if (retval)
1557                         exit(FSCK_ERROR);
1558         }
1559
1560         ctx->openfs_flags = flags;
1561         ctx->io_manager = io_ptr;
1562         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1563
1564         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
1565             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
1566             ((retval == EXT2_ET_BAD_MAGIC) ||
1567              (retval == EXT2_ET_SB_CSUM_INVALID) ||
1568              (retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1569              ((retval == 0) && (retval2 = ext2fs_check_desc(fs))))) {
1570                 if (retval) {
1571                         pctx.errcode = retval;
1572                         fix_problem(ctx, PR_0_OPEN_FAILED, &pctx);
1573                 }
1574                 if (retval2) {
1575                         pctx.errcode = retval2;
1576                         fix_problem(ctx, PR_0_CHECK_DESC_FAILED, &pctx);
1577                 }
1578                 pctx.errcode = 0;
1579                 if (retval2 == ENOMEM || retval2 == EXT2_ET_NO_MEMORY) {
1580                         retval = retval2;
1581                         goto failure;
1582                 }
1583                 if (fs->flags & EXT2_FLAG_NOFREE_ON_ERROR) {
1584                         ext2fs_free(fs);
1585                         fs = NULL;
1586                 }
1587                 if (!fs || (fs->group_desc_count > 1)) {
1588                         log_out(ctx, _("%s: %s trying backup blocks...\n"),
1589                                 ctx->program_name,
1590                                 retval ? _("Superblock invalid,") :
1591                                 _("Group descriptors look bad..."));
1592                         orig_superblock = ctx->superblock;
1593                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
1594                         if (fs)
1595                                 ext2fs_close_free(&fs);
1596                         orig_retval = retval;
1597                         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1598                         if ((orig_retval == 0) && retval != 0) {
1599                                 if (fs)
1600                                         ext2fs_close_free(&fs);
1601                                 log_out(ctx, _("%s: %s while using the "
1602                                                "backup blocks"),
1603                                         ctx->program_name,
1604                                         error_message(retval));
1605                                 log_out(ctx, _("%s: going back to original "
1606                                                "superblock\n"),
1607                                         ctx->program_name);
1608                                 ctx->superblock = orig_superblock;
1609                                 retval = try_open_fs(ctx, flags, io_ptr, &fs);
1610                         }
1611                 }
1612         }
1613         if (((retval == EXT2_ET_UNSUPP_FEATURE) ||
1614              (retval == EXT2_ET_RO_UNSUPP_FEATURE)) &&
1615             fs && fs->super) {
1616                 sb = fs->super;
1617                 features[0] = (sb->s_feature_compat &
1618                                ~EXT2_LIB_FEATURE_COMPAT_SUPP);
1619                 features[1] = (sb->s_feature_incompat &
1620                                ~EXT2_LIB_FEATURE_INCOMPAT_SUPP);
1621                 features[2] = (sb->s_feature_ro_compat &
1622                                ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1623                 if (features[0] || features[1] || features[2])
1624                         goto print_unsupp_features;
1625         }
1626 failure:
1627         if (retval) {
1628                 if (orig_retval)
1629                         retval = orig_retval;
1630                 com_err(ctx->program_name, retval, _("while trying to open %s"),
1631                         ctx->filesystem_name);
1632                 if (retval == EXT2_ET_REV_TOO_HIGH) {
1633                         log_out(ctx, "%s",
1634                                 _("The filesystem revision is apparently "
1635                                   "too high for this version of e2fsck.\n"
1636                                   "(Or the filesystem superblock "
1637                                   "is corrupt)\n\n"));
1638                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1639                 } else if (retval == EXT2_ET_SHORT_READ)
1640                         log_out(ctx, "%s",
1641                                 _("Could this be a zero-length partition?\n"));
1642                 else if ((retval == EPERM) || (retval == EACCES))
1643                         log_out(ctx, _("You must have %s access to the "
1644                                        "filesystem or be root\n"),
1645                                (ctx->options & E2F_OPT_READONLY) ?
1646                                "r/o" : "r/w");
1647                 else if (retval == ENXIO)
1648                         log_out(ctx, "%s",
1649                                 _("Possibly non-existent or swap device?\n"));
1650                 else if (retval == EBUSY)
1651                         log_out(ctx, "%s", _("Filesystem mounted or opened "
1652                                          "exclusively by another program?\n"));
1653                 else if (retval == ENOENT)
1654                         log_out(ctx, "%s",
1655                                 _("Possibly non-existent device?\n"));
1656 #ifdef EROFS
1657                 else if (retval == EROFS)
1658                         log_out(ctx, "%s", _("Disk write-protected; use the "
1659                                              "-n option to do a read-only\n"
1660                                              "check of the device.\n"));
1661 #endif
1662                 else {
1663                         /*
1664                          * Let's try once more will less consistency checking
1665                          * so that we are able to recover from more errors
1666                          * (e.g. some tool messing up some value in the sb).
1667                          */
1668                         if ((retval == EXT2_ET_CORRUPT_SUPERBLOCK) &&
1669                             !(flags & EXT2_FLAG_IGNORE_SB_ERRORS)) {
1670                                 if (fs)
1671                                         ext2fs_close_free(&fs);
1672                                 log_out(ctx, _("%s: Trying to load superblock "
1673                                         "despite errors...\n"),
1674                                         ctx->program_name);
1675                                 flags |= EXT2_FLAG_IGNORE_SB_ERRORS;
1676                                 /*
1677                                  * If we tried backup sb, revert to the
1678                                  * original one now.
1679                                  */
1680                                 if (orig_superblock != ~(blk64_t)0)
1681                                         ctx->superblock = orig_superblock;
1682                                 goto restart;
1683                         }
1684                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1685                         if (retval == EXT2_ET_BAD_MAGIC)
1686                                 check_plausibility(ctx->filesystem_name,
1687                                                    CHECK_FS_EXIST, NULL);
1688                 }
1689                 fatal_error(ctx, 0);
1690         }
1691         /*
1692          * We only update the master superblock because (a) paranoia;
1693          * we don't want to corrupt the backup superblocks, and (b) we
1694          * don't need to update the mount count and last checked
1695          * fields in the backup superblock (the kernel doesn't update
1696          * the backup superblocks anyway).  With newer versions of the
1697          * library this flag is set by ext2fs_open2(), but we set this
1698          * here just to be sure.  (No, we don't support e2fsck running
1699          * with some other libext2fs than the one that it was shipped
1700          * with, but just in case....)
1701          */
1702         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
1703
1704         if (!(ctx->flags & E2F_FLAG_GOT_DEVSIZE)) {
1705                 __u32 blocksize = EXT2_BLOCK_SIZE(fs->super);
1706                 int need_restart = 0;
1707
1708                 pctx.errcode = ext2fs_get_device_size2(ctx->filesystem_name,
1709                                                        blocksize,
1710                                                        &ctx->num_blocks);
1711                 /*
1712                  * The floppy driver refuses to allow anyone else to
1713                  * open the device if has been opened with O_EXCL;
1714                  * this is unlike other block device drivers in Linux.
1715                  * To handle this, we close the filesystem and then
1716                  * reopen the filesystem after we get the device size.
1717                  */
1718                 if (pctx.errcode == EBUSY) {
1719                         ext2fs_close_free(&fs);
1720                         need_restart++;
1721                         pctx.errcode =
1722                                 ext2fs_get_device_size2(ctx->filesystem_name,
1723                                                         blocksize,
1724                                                         &ctx->num_blocks);
1725                 }
1726                 if (pctx.errcode == EXT2_ET_UNIMPLEMENTED)
1727                         ctx->num_blocks = 0;
1728                 else if (pctx.errcode) {
1729                         fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
1730                         ctx->flags |= E2F_FLAG_ABORT;
1731                         fatal_error(ctx, 0);
1732                 }
1733                 ctx->flags |= E2F_FLAG_GOT_DEVSIZE;
1734                 if (need_restart)
1735                         goto restart;
1736         }
1737
1738         ctx->fs = fs;
1739         fs->now = ctx->now;
1740         sb = fs->super;
1741
1742         if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
1743                 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
1744                         _("while trying to open %s"),
1745                         ctx->filesystem_name);
1746         get_newer:
1747                 fatal_error(ctx, _("Get a newer version of e2fsck!"));
1748         }
1749
1750         /*
1751          * Set the device name, which is used whenever we print error
1752          * or informational messages to the user.
1753          */
1754         if (ctx->device_name == 0 && sb->s_volume_name[0])
1755                 ctx->device_name = string_copy(ctx, (char *) sb->s_volume_name,
1756                                                sizeof(sb->s_volume_name));
1757
1758         if (ctx->device_name == 0)
1759                 ctx->device_name = string_copy(ctx, ctx->filesystem_name, 0);
1760         for (cp = ctx->device_name; *cp; cp++)
1761                 if (isspace(*cp) || *cp == ':')
1762                         *cp = '_';
1763
1764         if (ctx->problem_logf) {
1765
1766                 fprintf(ctx->problem_logf, "<filesystem dev=\"%s\"",
1767                         ctx->filesystem_name);
1768                 if (!uuid_is_null(sb->s_uuid)) {
1769                         char buf[48];
1770
1771                         uuid_unparse(sb->s_uuid, buf);
1772                         fprintf(ctx->problem_logf, " uuid=\"%s\"", buf);
1773                 }
1774                 if (sb->s_volume_name[0])
1775                         fprintf(ctx->problem_logf, " label=\"%.*s\"",
1776                                 EXT2_LEN_STR(sb->s_volume_name));
1777
1778                 fputs("/>\n", ctx->problem_logf);
1779         }
1780
1781         ehandler_init(fs->io);
1782
1783         if (ext2fs_has_feature_mmp(fs->super) &&
1784             (flags & EXT2_FLAG_SKIP_MMP)) {
1785                 if (e2fsck_check_mmp(fs, ctx))
1786                         fatal_error(ctx, 0);
1787
1788                 /*
1789                  * Restart in order to reopen fs but this time start mmp.
1790                  */
1791                 ext2fs_close_free(&ctx->fs);
1792                 flags &= ~EXT2_FLAG_SKIP_MMP;
1793                 goto restart;
1794         }
1795
1796         if (ctx->logf)
1797                 fprintf(ctx->logf, "Filesystem UUID: %s\n",
1798                         e2p_uuid2str(sb->s_uuid));
1799
1800         /*
1801          * Make sure the ext3 superblock fields are consistent.
1802          */
1803         if ((ctx->mount_flags & (EXT2_MF_MOUNTED | EXT2_MF_BUSY)) == 0) {
1804                 retval = e2fsck_check_ext3_journal(ctx);
1805                 if (retval) {
1806                         com_err(ctx->program_name, retval,
1807                                 _("while checking journal for %s"),
1808                                 ctx->device_name);
1809                         fatal_error(ctx,
1810                                 _("Cannot proceed with file system check"));
1811                 }
1812         }
1813
1814         /*
1815          * Check to see if we need to do ext3-style recovery.  If so,
1816          * do it, and then restart the fsck.
1817          */
1818         if (ext2fs_has_feature_journal_needs_recovery(sb)) {
1819                 if (ctx->options & E2F_OPT_READONLY) {
1820                         log_out(ctx, "%s",
1821                                 _("Warning: skipping journal recovery because "
1822                                   "doing a read-only filesystem check.\n"));
1823                         io_channel_flush(ctx->fs->io);
1824                 } else {
1825                         if (ctx->flags & E2F_FLAG_RESTARTED) {
1826                                 /*
1827                                  * Whoops, we attempted to run the
1828                                  * journal twice.  This should never
1829                                  * happen, unless the hardware or
1830                                  * device driver is being bogus.
1831                                  */
1832                                 com_err(ctx->program_name, 0,
1833                                         _("unable to set superblock flags "
1834                                           "on %s\n"), ctx->device_name);
1835                                 fatal_error(ctx, 0);
1836                         }
1837                         retval = e2fsck_run_ext3_journal(ctx);
1838                         if (retval == EFSBADCRC) {
1839                                 log_out(ctx, _("Journal checksum error "
1840                                                "found in %s\n"),
1841                                         ctx->device_name);
1842                         } else if (retval == EFSCORRUPTED) {
1843                                 log_out(ctx, _("Journal corrupted in %s\n"),
1844                                         ctx->device_name);
1845                         } else if (retval) {
1846                                 com_err(ctx->program_name, retval,
1847                                 _("while recovering journal of %s"),
1848                                         ctx->device_name);
1849                         }
1850                         ext2fs_close_free(&ctx->fs);
1851                         ctx->flags |= E2F_FLAG_RESTARTED;
1852                         goto restart;
1853                 }
1854         }
1855
1856         /*
1857          * Check for compatibility with the feature sets.  We need to
1858          * be more stringent than ext2fs_open().
1859          */
1860         features[0] = sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP;
1861         features[1] = sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP;
1862         features[2] = (sb->s_feature_ro_compat &
1863                        ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1864 print_unsupp_features:
1865         if (features[0] || features[1] || features[2]) {
1866                 int     i, j;
1867                 __u32   *mask = features, m;
1868
1869                 log_err(ctx, _("%s has unsupported feature(s):"),
1870                         ctx->filesystem_name);
1871
1872                 for (i=0; i <3; i++,mask++) {
1873                         for (j=0,m=1; j < 32; j++, m<<=1) {
1874                                 if (*mask & m)
1875                                         log_err(ctx, " %s",
1876                                                 e2p_feature2string(i, m));
1877                         }
1878                 }
1879                 log_err(ctx, "\n");
1880                 goto get_newer;
1881         }
1882
1883         if (ext2fs_has_feature_casefold(sb) && !fs->encoding) {
1884                 log_err(ctx, _("%s has unsupported encoding: %0x\n"),
1885                         ctx->filesystem_name, sb->s_encoding);
1886                 goto get_newer;
1887         }
1888
1889         /*
1890          * If the user specified a specific superblock, presumably the
1891          * master superblock has been trashed.  So we mark the
1892          * superblock as dirty, so it can be written out.
1893          */
1894         if (ctx->superblock &&
1895             !(ctx->options & E2F_OPT_READONLY))
1896                 ext2fs_mark_super_dirty(fs);
1897
1898         /*
1899          * Calculate the number of filesystem blocks per pagesize.  If
1900          * fs->blocksize > page_size, set the number of blocks per
1901          * pagesize to 1 to avoid division by zero errors.
1902          */
1903 #ifdef _SC_PAGESIZE
1904         sysval = sysconf(_SC_PAGESIZE);
1905         if (sysval > 0)
1906                 sys_page_size = sysval;
1907 #endif /* _SC_PAGESIZE */
1908         ctx->blocks_per_page = sys_page_size / fs->blocksize;
1909         if (ctx->blocks_per_page == 0)
1910                 ctx->blocks_per_page = 1;
1911
1912         if (ctx->superblock)
1913                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
1914         ext2fs_mark_valid(fs);
1915         check_super_block(ctx);
1916         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1917                 fatal_error(ctx, 0);
1918         check_if_skip(ctx);
1919         check_resize_inode(ctx);
1920         if (bad_blocks_file)
1921                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
1922         else if (cflag)
1923                 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
1924         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1925                 fatal_error(ctx, 0);
1926
1927         /*
1928          * Mark the system as valid, 'til proven otherwise
1929          */
1930         ext2fs_mark_valid(fs);
1931
1932         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
1933         if (retval) {
1934                 log_out(ctx, _("%s: %s while reading bad blocks inode\n"),
1935                         ctx->program_name, error_message(retval));
1936                 preenhalt(ctx);
1937                 log_out(ctx, "%s", _("This doesn't bode well, "
1938                                      "but we'll try to go on...\n"));
1939         }
1940
1941         /*
1942          * Save the journal size in megabytes.
1943          * Try and use the journal size from the backup else let e2fsck
1944          * find the default journal size. If fast commit feature is enabled,
1945          * it is not clear how many of the journal blocks were fast commit
1946          * blocks. So, ignore the size of journal found in backup.
1947          *
1948          * TODO: Add a new backup type that captures fast commit info as
1949          * well.
1950          */
1951         if (sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS &&
1952                 !ext2fs_has_feature_fast_commit(sb))
1953                 journal_size = (sb->s_jnl_blocks[15] << (32 - 20)) |
1954                                (sb->s_jnl_blocks[16] >> 20);
1955         else
1956                 journal_size = -1;
1957
1958         if (ext2fs_has_feature_quota(sb)) {
1959                 /* Quotas were enabled. Do quota accounting during fsck. */
1960                 clear_problem_context(&pctx);
1961                 pctx.errcode = quota_init_context(&ctx->qctx, ctx->fs, 0);
1962                 if (pctx.errcode) {
1963                         fix_problem(ctx, PR_0_QUOTA_INIT_CTX, &pctx);
1964                         fatal_error(ctx, 0);
1965                 }
1966         }
1967
1968         run_result = e2fsck_run(ctx);
1969         e2fsck_clear_progbar(ctx);
1970
1971         if (!ctx->invalid_bitmaps &&
1972             (ctx->flags & E2F_FLAG_JOURNAL_INODE)) {
1973                 if (fix_problem(ctx, PR_6_RECREATE_JOURNAL, &pctx)) {
1974                         if (journal_size < 1024) {
1975                                 ext2fs_get_journal_params(&jparams, fs);
1976                         } else {
1977                                 jparams.num_journal_blocks = journal_size;
1978                                 jparams.num_fc_blocks = 0;
1979                         }
1980                         log_out(ctx, _("Creating journal (%d blocks): "),
1981                                jparams.num_journal_blocks);
1982                         fflush(stdout);
1983                         retval = ext2fs_add_journal_inode3(fs, &jparams, ~0ULL, 0);
1984                         if (retval) {
1985                                 log_out(ctx, "%s: while trying to create "
1986                                         "journal\n", error_message(retval));
1987                                 goto no_journal;
1988                         }
1989                         log_out(ctx, "%s", _(" Done.\n"));
1990                         log_out(ctx, "%s",
1991                                 _("\n*** journal has been regenerated ***\n"));
1992                 }
1993         }
1994 no_journal:
1995
1996         if (run_result & E2F_FLAG_ABORT) {
1997                 fatal_error(ctx, _("aborted"));
1998         } else if (run_result & E2F_FLAG_CANCEL) {
1999                 log_out(ctx, _("%s: e2fsck canceled.\n"), ctx->device_name ?
2000                         ctx->device_name : ctx->filesystem_name);
2001                 exit_value |= FSCK_CANCELED;
2002         } else if (ctx->qctx && !ctx->invalid_bitmaps) {
2003                 int needs_writeout;
2004
2005                 for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
2006                         if (*quota_sb_inump(sb, qtype) == 0)
2007                                 continue;
2008                         needs_writeout = 0;
2009                         pctx.num = qtype;
2010                         retval = quota_compare_and_update(ctx->qctx, qtype,
2011                                                           &needs_writeout);
2012                         if ((retval || needs_writeout) &&
2013                             fix_problem(ctx, PR_6_UPDATE_QUOTAS, &pctx)) {
2014                                 pctx.errcode = quota_write_inode(ctx->qctx,
2015                                                                  1 << qtype);
2016                                 if (pctx.errcode)
2017                                         (void) fix_problem(ctx,
2018                                                 PR_6_WRITE_QUOTAS, &pctx);
2019                         }
2020                 }
2021                 quota_release_context(&ctx->qctx);
2022         }
2023
2024         if (run_result == E2F_FLAG_RESTART) {
2025                 log_out(ctx, "%s",
2026                         _("Restarting e2fsck from the beginning...\n"));
2027                 retval = e2fsck_reset_context(ctx);
2028                 if (retval) {
2029                         com_err(ctx->program_name, retval, "%s",
2030                                 _("while resetting context"));
2031                         fatal_error(ctx, 0);
2032                 }
2033                 ext2fs_close_free(&ctx->fs);
2034                 goto restart;
2035         }
2036
2037 #ifdef MTRACE
2038         mtrace_print("Cleanup");
2039 #endif
2040         was_changed = ext2fs_test_changed(fs);
2041         if (!(ctx->flags & E2F_FLAG_RUN_RETURN) &&
2042             !(ctx->options & E2F_OPT_READONLY)) {
2043                 if (ext2fs_test_valid(fs)) {
2044                         if (!(sb->s_state & EXT2_VALID_FS))
2045                                 exit_value |= FSCK_NONDESTRUCT;
2046                         sb->s_state = EXT2_VALID_FS;
2047                         if (check_backup_super_block(ctx))
2048                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
2049                 } else
2050                         sb->s_state &= ~EXT2_VALID_FS;
2051                 if (!(ctx->flags & E2F_FLAG_TIME_INSANE))
2052                         sb->s_lastcheck = ctx->now;
2053                 sb->s_mnt_count = 0;
2054                 memset(((char *) sb) + EXT4_S_ERR_START, 0, EXT4_S_ERR_LEN);
2055                 pctx.errcode = ext2fs_set_gdt_csum(ctx->fs);
2056                 if (pctx.errcode)
2057                         fix_problem(ctx, PR_6_SET_BG_CHECKSUM, &pctx);
2058                 ext2fs_mark_super_dirty(fs);
2059         }
2060
2061         if (ext2fs_has_feature_shared_blocks(ctx->fs->super) &&
2062             (ctx->options & E2F_OPT_UNSHARE_BLOCKS) &&
2063             (ctx->options & E2F_OPT_NO))
2064                 /* Don't try to write or flush I/O, we just wanted to know whether or
2065                  * not there were enough free blocks to undo deduplication.
2066                  */
2067                 goto skip_write;
2068
2069         if (!(ctx->options & E2F_OPT_READONLY)) {
2070                 e2fsck_write_bitmaps(ctx);
2071                 if (fs->flags & EXT2_FLAG_DIRTY) {
2072                         pctx.errcode = ext2fs_flush(ctx->fs);
2073                         if (pctx.errcode)
2074                                 fix_problem(ctx, PR_6_FLUSH_FILESYSTEM, &pctx);
2075                 }
2076                 pctx.errcode = io_channel_flush(ctx->fs->io);
2077                 if (pctx.errcode)
2078                         fix_problem(ctx, PR_6_IO_FLUSH, &pctx);
2079         }
2080
2081         if (was_changed) {
2082                 int fs_fixed = (ctx->flags & E2F_FLAG_PROBLEMS_FIXED);
2083
2084                 if (fs_fixed)
2085                         exit_value |= FSCK_NONDESTRUCT;
2086                 if (!(ctx->options & E2F_OPT_PREEN)) {
2087 #if 0   /* Do this later; it breaks too many tests' golden outputs */
2088                         log_out(ctx, fs_fixed ?
2089                                 _("\n%s: ***** FILE SYSTEM ERRORS "
2090                                   "CORRECTED *****\n") :
2091                                 _("%s: File system was modified.\n"),
2092                                 ctx->device_name);
2093 #else
2094                         log_out(ctx,
2095                                 _("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
2096                                 ctx->device_name);
2097 #endif
2098                 }
2099                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
2100                         log_out(ctx, _("%s: ***** REBOOT SYSTEM *****\n"),
2101                                 ctx->device_name);
2102                         exit_value |= FSCK_REBOOT;
2103                 }
2104         }
2105
2106 skip_write:
2107         if (!ext2fs_test_valid(fs) ||
2108             ((exit_value & FSCK_CANCELED) &&
2109              (sb->s_state & EXT2_ERROR_FS))) {
2110                 log_out(ctx, _("\n%s: ********** WARNING: Filesystem still has "
2111                                "errors **********\n\n"), ctx->device_name);
2112                 exit_value |= FSCK_UNCORRECTED;
2113                 exit_value &= ~FSCK_NONDESTRUCT;
2114         }
2115         if (exit_value & FSCK_CANCELED) {
2116                 int     allow_cancellation;
2117
2118                 profile_get_boolean(ctx->profile, "options",
2119                                     "allow_cancellation", 0, 0,
2120                                     &allow_cancellation);
2121                 exit_value &= ~FSCK_NONDESTRUCT;
2122                 if (allow_cancellation && ext2fs_test_valid(fs) &&
2123                     (sb->s_state & EXT2_VALID_FS) &&
2124                     !(sb->s_state & EXT2_ERROR_FS))
2125                         exit_value = 0;
2126         } else
2127                 show_stats(ctx);
2128
2129         print_resource_track(ctx, NULL, &ctx->global_rtrack, ctx->fs->io);
2130
2131         ext2fs_close_free(&ctx->fs);
2132         free(ctx->journal_name);
2133
2134         if (ctx->logf)
2135                 fprintf(ctx->logf, "Exit status: %d\n", exit_value);
2136         e2fsck_free_context(ctx);
2137         remove_error_table(&et_ext2_error_table);
2138         remove_error_table(&et_prof_error_table);
2139         return exit_value;
2140 }