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 <stdio.h>
  15 #ifdef HAVE_STDLIB_H
  16 #include <stdlib.h>
  17 #endif
  18 #include <string.h>
  19 #include <fcntl.h>
  20 #include <ctype.h>
  21 #include <time.h>
  22 #ifdef HAVE_SIGNAL_H
  23 #include <signal.h>
  24 #endif
  25 #ifdef HAVE_GETOPT_H
  26 #include <getopt.h>
  27 #else
  28 extern char *optarg;
  29 extern int optind;
  30 #endif
  31 #include <unistd.h>
  32 #ifdef HAVE_ERRNO_H
  33 #include <errno.h>
  34 #endif
  35 #ifdef HAVE_MNTENT_H
  36 #include <mntent.h>
  37 #endif
  38 #ifdef HAVE_SYS_IOCTL_H
  39 #include <sys/ioctl.h>
  40 #endif
  41 #ifdef HAVE_MALLOC_H
  42 #include <malloc.h>
  43 #endif
  44 #ifdef HAVE_SYS_TYPES_H
  45 #include <sys/types.h>
  46 #endif
  47 #ifdef HAVE_DIRENT_H
  48 #include <dirent.h>
  49 #endif
  50
  51 #include "e2p/e2p.h"
  52 #include "et/com_err.h"
  53 #include "e2p/e2p.h"
  54 #include "e2fsck.h"
  55 #include "problem.h"
  56 #include "../version.h"
  57
  58 /* Command line options */
  59 static int cflag;               /* check disk */
  60 static int show_version_only;
  61 static int verbose;
  62
  63 static int replace_bad_blocks;
  64 static int keep_bad_blocks;
  65 static char *bad_blocks_file;
  66
  67 e2fsck_t e2fsck_global_ctx;     /* Try your very best not to use this! */
  68
  69 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jfs-debug */
  70 int journal_enable_debug = -1;
  71 #endif
  72
  73 static void usage(e2fsck_t ctx)
  74 {
  75         fprintf(stderr,
  76                 _("Usage: %s [-panyrcdfvtDFV] [-b superblock] [-B blocksize]\n"
  77                 "\t\t[-I inode_buffer_blocks] [-P process_inode_size]\n"
  78                 "\t\t[-l|-L bad_blocks_file] [-C fd] [-j external_journal]\n"
  79                 "\t\t[-E extended-options] device\n"),
  80                 ctx->program_name);
  81
  82         fprintf(stderr, _("\nEmergency help:\n"
  83                 " -p                   Automatic repair (no questions)\n"
  84                 " -n                   Make no changes to the filesystem\n"
  85                 " -y                   Assume \"yes\" to all questions\n"
  86                 " -c                   Check for bad blocks and add them to the badblock list\n"
  87                 " -f                   Force checking even if filesystem is marked clean\n"));
  88         fprintf(stderr, _(""
  89                 " -v                   Be verbose\n"
  90                 " -b superblock        Use alternative superblock\n"
  91                 " -B blocksize         Force blocksize when looking for superblock\n"
  92                 " -j external_journal  Set location of the external journal\n"
  93                 " -l bad_blocks_file   Add to badblocks list\n"
  94                 " -L bad_blocks_file   Set badblocks list\n"
  95                 ));
  96
  97         exit(FSCK_USAGE);
  98 }
  99
 100 static void show_stats(e2fsck_t ctx)
 101 {
 102         ext2_filsys fs = ctx->fs;
 103         ext2_ino_t inodes, inodes_used;
 104         blk_t blocks, blocks_used;
 105         int dir_links;
 106         int num_files, num_links;
 107         int frag_percent_file, frag_percent_dir, frag_percent_total;
 108         int i, j;
 109
 110         dir_links = 2 * ctx->fs_directory_count - 1;
 111         num_files = ctx->fs_total_count - dir_links;
 112         num_links = ctx->fs_links_count - dir_links;
 113         inodes = fs->super->s_inodes_count;
 114         inodes_used = (fs->super->s_inodes_count -
 115                        fs->super->s_free_inodes_count);
 116         blocks = fs->super->s_blocks_count;
 117         blocks_used = (fs->super->s_blocks_count -
 118                        fs->super->s_free_blocks_count);
 119
 120         frag_percent_file = (10000 * ctx->fs_fragmented) / inodes_used;
 121         frag_percent_file = (frag_percent_file + 5) / 10;
 122
 123         frag_percent_dir = (10000 * ctx->fs_fragmented_dir) / inodes_used;
 124         frag_percent_dir = (frag_percent_dir + 5) / 10;
 125
 126         frag_percent_total = ((10000 * (ctx->fs_fragmented +
 127                                         ctx->fs_fragmented_dir))
 128                               / inodes_used);
 129         frag_percent_total = (frag_percent_total + 5) / 10;
 130
 131         if (!verbose) {
 132                 printf(_("%s: %u/%u files (%0d.%d%% non-contiguous), %u/%u blocks\n"),
 133                        ctx->device_name, inodes_used, inodes,
 134                        frag_percent_total / 10, frag_percent_total % 10,
 135                        blocks_used, blocks);
 136                 return;
 137         }
 138         printf (P_("\n%8u inode used (%2.2f%%)\n", "\n%8u inodes used (%2.2f%%)\n",
 139                    inodes_used), inodes_used, 100.0 * inodes_used / inodes);
 140         printf (P_("%8u non-contiguous file (%0d.%d%%)\n",
 141                    "%8u non-contiguous files (%0d.%d%%)\n",
 142                    ctx->fs_fragmented),
 143                 ctx->fs_fragmented, frag_percent_file / 10,
 144                 frag_percent_file % 10);
 145         printf (P_("%8u non-contiguous directory (%0d.%d%%)\n",
 146                    "%8u non-contiguous directories (%0d.%d%%)\n",
 147                    ctx->fs_fragmented_dir),
 148                 ctx->fs_fragmented_dir, frag_percent_dir / 10,
 149                 frag_percent_dir % 10);
 150         printf (_("         # of inodes with ind/dind/tind blocks: %u/%u/%u\n"),
 151                 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
 152
 153         for (j=MAX_EXTENT_DEPTH_COUNT-1; j >=0; j--)
 154                 if (ctx->extent_depth_count[j])
 155                         break;
 156         if (++j) {
 157                 printf (_("         Extent depth histogram: "));
 158                 for (i=0; i < j; i++) {
 159                         if (i)
 160                                 fputc('/', stdout);
 161                         printf("%u", ctx->extent_depth_count[i]);
 162                 }
 163                 fputc('\n', stdout);
 164         }
 165
 166         printf (P_("%8u block used (%2.2f%%)\n", "%8u blocks used (%2.2f%%)\n",
 167                    blocks_used), blocks_used, 100.0 * blocks_used / blocks);
 168         printf (P_("%8u bad block\n", "%8u bad blocks\n",
 169                    ctx->fs_badblocks_count), ctx->fs_badblocks_count);
 170         printf (P_("%8u large file\n", "%8u large files\n",
 171                    ctx->large_files), ctx->large_files);
 172         printf (P_("\n%8u regular file\n", "\n%8u regular files\n",
 173                    ctx->fs_regular_count), ctx->fs_regular_count);
 174         printf (P_("%8u directory\n", "%8u directories\n",
 175                    ctx->fs_directory_count), ctx->fs_directory_count);
 176         printf (P_("%8u character device file\n",
 177                    "%8u character device files\n", ctx->fs_chardev_count),
 178                 ctx->fs_chardev_count);
 179         printf (P_("%8u block device file\n", "%8u block device files\n",
 180                    ctx->fs_blockdev_count), ctx->fs_blockdev_count);
 181         printf (P_("%8u fifo\n", "%8u fifos\n", ctx->fs_fifo_count),
 182                 ctx->fs_fifo_count);
 183         printf (P_("%8u link\n", "%8u links\n",
 184                    ctx->fs_links_count - dir_links),
 185                 ctx->fs_links_count - dir_links);
 186         printf (P_("%8u symbolic link", "%8u symbolic links",
 187                    ctx->fs_symlinks_count), ctx->fs_symlinks_count);
 188         printf (P_(" (%u fast symbolic link)\n", " (%u fast symbolic links)\n",
 189                    ctx->fs_fast_symlinks_count), ctx->fs_fast_symlinks_count);
 190         printf (P_("%8u socket\n", "%8u sockets\n", ctx->fs_sockets_count),
 191                 ctx->fs_sockets_count);
 192         printf ("--------\n");
 193         printf (P_("%8u file\n", "%8u files\n",
 194                    ctx->fs_total_count - dir_links),
 195                 ctx->fs_total_count - dir_links);
 196 }
 197
 198 static void check_mount(e2fsck_t ctx)
 199 {
 200         errcode_t       retval;
 201         int             cont;
 202
 203         retval = ext2fs_check_if_mounted(ctx->filesystem_name,
 204                                          &ctx->mount_flags);
 205         if (retval) {
 206                 com_err("ext2fs_check_if_mount", retval,
 207                         _("while determining whether %s is mounted."),
 208                         ctx->filesystem_name);
 209                 return;
 210         }
 211
 212         /*
 213          * If the filesystem isn't mounted, or it's the root
 214          * filesystem and it's mounted read-only, and we're not doing
 215          * a read/write check, then everything's fine.
 216          */
 217         if ((!(ctx->mount_flags & EXT2_MF_MOUNTED)) ||
 218             ((ctx->mount_flags & EXT2_MF_ISROOT) &&
 219              (ctx->mount_flags & EXT2_MF_READONLY) &&
 220              !(ctx->options & E2F_OPT_WRITECHECK)))
 221                 return;
 222
 223         if ((ctx->options & E2F_OPT_READONLY) &&
 224             !(ctx->options & E2F_OPT_WRITECHECK)) {
 225                 printf(_("Warning!  %s is mounted.\n"), ctx->filesystem_name);
 226                 return;
 227         }
 228
 229         printf(_("%s is mounted.  "), ctx->filesystem_name);
 230         if (!ctx->interactive)
 231                 fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
 232         printf(_("\n\n\007\007\007\007WARNING!!!  "
 233                "The filesystem is mounted.   If you continue you ***WILL***\n"
 234                "cause ***SEVERE*** filesystem damage.\007\007\007\n\n"));
 235         cont = ask_yn(_("Do you really want to continue"), -1);
 236         if (!cont) {
 237                 printf (_("check aborted.\n"));
 238                 exit (0);
 239         }
 240         return;
 241 }
 242
 243 static int is_on_batt(void)
 244 {
 245         FILE    *f;
 246         DIR     *d;
 247         char    tmp[80], tmp2[80], fname[80];
 248         unsigned int    acflag;
 249         struct dirent*  de;
 250
 251         f = fopen("/proc/apm", "r");
 252         if (f) {
 253                 if (fscanf(f, "%s %s %s %x", tmp, tmp, tmp, &acflag) != 4)
 254                         acflag = 1;
 255                 fclose(f);
 256                 return (acflag != 1);
 257         }
 258         d = opendir("/proc/acpi/ac_adapter");
 259         if (d) {
 260                 while ((de=readdir(d)) != NULL) {
 261                         if (!strncmp(".", de->d_name, 1))
 262                                 continue;
 263                         snprintf(fname, 80, "/proc/acpi/ac_adapter/%s/state",
 264                                  de->d_name);
 265                         f = fopen(fname, "r");
 266                         if (!f)
 267                                 continue;
 268                         if (fscanf(f, "%s %s", tmp2, tmp) != 2)
 269                                 tmp[0] = 0;
 270                         fclose(f);
 271                         if (strncmp(tmp, "off-line", 8) == 0) {
 272                                 closedir(d);
 273                                 return 1;
 274                         }
 275                 }
 276                 closedir(d);
 277         }
 278         return 0;
 279 }
 280
 281 /*
 282  * This routine checks to see if a filesystem can be skipped; if so,
 283  * it will exit with E2FSCK_OK.  Under some conditions it will print a
 284  * message explaining why a check is being forced.
 285  */
 286 static void check_if_skip(e2fsck_t ctx)
 287 {
 288         ext2_filsys fs = ctx->fs;
 289         const char *reason = NULL;
 290         unsigned int reason_arg = 0;
 291         long next_check;
 292         int batt = is_on_batt();
 293         int defer_check_on_battery;
 294         int broken_system_clock;
 295         time_t lastcheck;
 296
 297         profile_get_boolean(ctx->profile, "options", "broken_system_clock",
 298                             0, 0, &broken_system_clock);
 299         if (ctx->flags & E2F_FLAG_TIME_INSANE)
 300                 broken_system_clock = 1;
 301         profile_get_boolean(ctx->profile, "options",
 302                             "defer_check_on_battery", 0, 1,
 303                             &defer_check_on_battery);
 304         if (!defer_check_on_battery)
 305                 batt = 0;
 306
 307         if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file || cflag)
 308                 return;
 309
 310         lastcheck = fs->super->s_lastcheck;
 311         if (lastcheck > ctx->now)
 312                 lastcheck -= ctx->time_fudge;
 313         if ((fs->super->s_state & EXT2_ERROR_FS) ||
 314             !ext2fs_test_valid(fs))
 315                 reason = _(" contains a file system with errors");
 316         else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
 317                 reason = _(" was not cleanly unmounted");
 318         else if (check_backup_super_block(ctx))
 319                 reason = _(" primary superblock features different from backup");
 320         else if ((fs->super->s_max_mnt_count > 0) &&
 321                  (fs->super->s_mnt_count >=
 322                   (unsigned) fs->super->s_max_mnt_count)) {
 323                 reason = _(" has been mounted %u times without being checked");
 324                 reason_arg = fs->super->s_mnt_count;
 325                 if (batt && (fs->super->s_mnt_count <
 326                              (unsigned) fs->super->s_max_mnt_count*2))
 327                         reason = 0;
 328         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 329                    (ctx->now < lastcheck)) {
 330                 reason = _(" has filesystem last checked time in the future");
 331                 if (batt)
 332                         reason = 0;
 333         } else if (!broken_system_clock && fs->super->s_checkinterval &&
 334                    ((ctx->now - lastcheck) >=
 335                     ((time_t) fs->super->s_checkinterval))) {
 336                 reason = _(" has gone %u days without being checked");
 337                 reason_arg = (ctx->now - fs->super->s_lastcheck)/(3600*24);
 338                 if (batt && ((ctx->now - fs->super->s_lastcheck) <
 339                              fs->super->s_checkinterval*2))
 340                         reason = 0;
 341         }
 342         if (reason) {
 343                 fputs(ctx->device_name, stdout);
 344                 printf(reason, reason_arg);
 345                 fputs(_(", check forced.\n"), stdout);
 346                 return;
 347         }
 348         printf(_("%s: clean, %u/%u files, %u/%u blocks"), ctx->device_name,
 349                fs->super->s_inodes_count - fs->super->s_free_inodes_count,
 350                fs->super->s_inodes_count,
 351                fs->super->s_blocks_count - fs->super->s_free_blocks_count,
 352                fs->super->s_blocks_count);
 353         next_check = 100000;
 354         if (fs->super->s_max_mnt_count > 0) {
 355                 next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count;
 356                 if (next_check <= 0)
 357                         next_check = 1;
 358         }
 359         if (!broken_system_clock && fs->super->s_checkinterval &&
 360             ((ctx->now - fs->super->s_lastcheck) >= fs->super->s_checkinterval))
 361                 next_check = 1;
 362         if (next_check <= 5) {
 363                 if (next_check == 1) {
 364                         if (batt)
 365                                 fputs(_(" (check deferred; on battery)"),
 366                                       stdout);
 367                         else
 368                                 fputs(_(" (check after next mount)"), stdout);
 369                 } else
 370                         printf(_(" (check in %ld mounts)"), next_check);
 371         }
 372         fputc('\n', stdout);
 373         ext2fs_close(fs);
 374         ctx->fs = NULL;
 375         e2fsck_free_context(ctx);
 376         exit(FSCK_OK);
 377 }
 378
 379 /*
 380  * For completion notice
 381  */
 382 struct percent_tbl {
 383         int     max_pass;
 384         int     table[32];
 385 };
 386 struct percent_tbl e2fsck_tbl = {
 387         5, { 0, 70, 90, 92,  95, 100 }
 388 };
 389 static char bar[128], spaces[128];
 390
 391 static float calc_percent(struct percent_tbl *tbl, int pass, int curr,
 392                           int max)
 393 {
 394         float   percent;
 395
 396         if (pass <= 0)
 397                 return 0.0;
 398         if (pass > tbl->max_pass || max == 0)
 399                 return 100.0;
 400         percent = ((float) curr) / ((float) max);
 401         return ((percent * (tbl->table[pass] - tbl->table[pass-1]))
 402                 + tbl->table[pass-1]);
 403 }
 404
 405 extern void e2fsck_clear_progbar(e2fsck_t ctx)
 406 {
 407         if (!(ctx->flags & E2F_FLAG_PROG_BAR))
 408                 return;
 409
 410         printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80),
 411                ctx->stop_meta);
 412         fflush(stdout);
 413         ctx->flags &= ~E2F_FLAG_PROG_BAR;
 414 }
 415
 416 int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent,
 417                            unsigned int dpynum)
 418 {
 419         static const char spinner[] = "\\|/-";
 420         int     i;
 421         unsigned int    tick;
 422         struct timeval  tv;
 423         int dpywidth;
 424         int fixed_percent;
 425
 426         if (ctx->flags & E2F_FLAG_PROG_SUPPRESS)
 427                 return 0;
 428
 429         /*
 430          * Calculate the new progress position.  If the
 431          * percentage hasn't changed, then we skip out right
 432          * away.
 433          */
 434         fixed_percent = (int) ((10 * percent) + 0.5);
 435         if (ctx->progress_last_percent == fixed_percent)
 436                 return 0;
 437         ctx->progress_last_percent = fixed_percent;
 438
 439         /*
 440          * If we've already updated the spinner once within
 441          * the last 1/8th of a second, no point doing it
 442          * again.
 443          */
 444         gettimeofday(&tv, NULL);
 445         tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8));
 446         if ((tick == ctx->progress_last_time) &&
 447             (fixed_percent != 0) && (fixed_percent != 1000))
 448                 return 0;
 449         ctx->progress_last_time = tick;
 450
 451         /*
 452          * Advance the spinner, and note that the progress bar
 453          * will be on the screen
 454          */
 455         ctx->progress_pos = (ctx->progress_pos+1) & 3;
 456         ctx->flags |= E2F_FLAG_PROG_BAR;
 457
 458         dpywidth = 66 - strlen(label);
 459         dpywidth = 8 * (dpywidth / 8);
 460         if (dpynum)
 461                 dpywidth -= 8;
 462
 463         i = ((percent * dpywidth) + 50) / 100;
 464         printf("%s%s: |%s%s", ctx->start_meta, label,
 465                bar + (sizeof(bar) - (i+1)),
 466                spaces + (sizeof(spaces) - (dpywidth - i + 1)));
 467         if (fixed_percent == 1000)
 468                 fputc('|', stdout);
 469         else
 470                 fputc(spinner[ctx->progress_pos & 3], stdout);
 471         printf(" %4.1f%%  ", percent);
 472         if (dpynum)
 473                 printf("%u\r", dpynum);
 474         else
 475                 fputs(" \r", stdout);
 476         fputs(ctx->stop_meta, stdout);
 477
 478         if (fixed_percent == 1000)
 479                 e2fsck_clear_progbar(ctx);
 480         fflush(stdout);
 481
 482         return 0;
 483 }
 484
 485 static int e2fsck_update_progress(e2fsck_t ctx, int pass,
 486                                   unsigned long cur, unsigned long max)
 487 {
 488         char buf[1024];
 489         float percent;
 490
 491         if (pass == 0)
 492                 return 0;
 493
 494         if (ctx->progress_fd) {
 495                 snprintf(buf, sizeof(buf), "%d %lu %lu %s\n",
 496                          pass, cur, max, ctx->device_name);
 497                 write_all(ctx->progress_fd, buf, strlen(buf));
 498         } else {
 499                 percent = calc_percent(&e2fsck_tbl, pass, cur, max);
 500                 e2fsck_simple_progress(ctx, ctx->device_name,
 501                                        percent, 0);
 502         }
 503         return 0;
 504 }
 505
 506 #define PATH_SET "PATH=/sbin"
 507
 508 static void reserve_stdio_fds(void)
 509 {
 510         int     fd;
 511
 512         while (1) {
 513                 fd = open("/dev/null", O_RDWR);
 514                 if (fd > 2)
 515                         break;
 516                 if (fd < 0) {
 517                         fprintf(stderr, _("ERROR: Couldn't open "
 518                                 "/dev/null (%s)\n"),
 519                                 strerror(errno));
 520                         break;
 521                 }
 522         }
 523         close(fd);
 524 }
 525
 526 #ifdef HAVE_SIGNAL_H
 527 static void signal_progress_on(int sig EXT2FS_ATTR((unused)))
 528 {
 529         e2fsck_t ctx = e2fsck_global_ctx;
 530
 531         if (!ctx)
 532                 return;
 533
 534         ctx->progress = e2fsck_update_progress;
 535 }
 536
 537 static void signal_progress_off(int sig EXT2FS_ATTR((unused)))
 538 {
 539         e2fsck_t ctx = e2fsck_global_ctx;
 540
 541         if (!ctx)
 542                 return;
 543
 544         e2fsck_clear_progbar(ctx);
 545         ctx->progress = 0;
 546 }
 547
 548 static void signal_cancel(int sig EXT2FS_ATTR((unused)))
 549 {
 550         e2fsck_t ctx = e2fsck_global_ctx;
 551
 552         if (!ctx)
 553                 exit(FSCK_CANCELED);
 554
 555         ctx->flags |= E2F_FLAG_CANCEL;
 556 }
 557 #endif
 558
 559 static void parse_extended_opts(e2fsck_t ctx, const char *opts)
 560 {
 561         char    *buf, *token, *next, *p, *arg;
 562         int     ea_ver;
 563         int     extended_usage = 0;
 564
 565         buf = string_copy(ctx, opts, 0);
 566         for (token = buf; token && *token; token = next) {
 567                 p = strchr(token, ',');
 568                 next = 0;
 569                 if (p) {
 570                         *p = 0;
 571                         next = p+1;
 572                 }
 573                 arg = strchr(token, '=');
 574                 if (arg) {
 575                         *arg = 0;
 576                         arg++;
 577                 }
 578                 if (strcmp(token, "ea_ver") == 0) {
 579                         if (!arg) {
 580                                 extended_usage++;
 581                                 continue;
 582                         }
 583                         ea_ver = strtoul(arg, &p, 0);
 584                         if (*p ||
 585                             ((ea_ver != 1) && (ea_ver != 2))) {
 586                                 fprintf(stderr,
 587                                         _("Invalid EA version.\n"));
 588                                 extended_usage++;
 589                                 continue;
 590                         }
 591                         ctx->ext_attr_ver = ea_ver;
 592                 } else if (strcmp(token, "fragcheck") == 0) {
 593                         ctx->options |= E2F_OPT_FRAGCHECK;
 594                         continue;
 595                 } else {
 596                         fprintf(stderr, _("Unknown extended option: %s\n"),
 597                                 token);
 598                         extended_usage++;
 599                 }
 600         }
 601         free(buf);
 602
 603         if (extended_usage) {
 604                 fputs(("\nExtended options are separated by commas, "
 605                        "and may take an argument which\n"
 606                        "is set off by an equals ('=') sign.  "
 607                        "Valid extended options are:\n"), stderr);
 608                 fputs(("\tea_ver=<ea_version (1 or 2)>\n"), stderr);
 609                 fputs(("\tfragcheck\n"), stderr);
 610                 fputc('\n', stderr);
 611                 exit(1);
 612         }
 613 }
 614
 615 static void syntax_err_report(const char *filename, long err, int line_num)
 616 {
 617         fprintf(stderr,
 618                 _("Syntax error in e2fsck config file (%s, line #%d)\n\t%s\n"),
 619                 filename, line_num, error_message(err));
 620         exit(FSCK_ERROR);
 621 }
 622
 623 static const char *config_fn[] = { ROOT_SYSCONFDIR "/e2fsck.conf", 0 };
 624
 625 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 626 {
 627         int             flush = 0;
 628         int             c, fd;
 629 #ifdef MTRACE
 630         extern void     *mallwatch;
 631 #endif
 632         e2fsck_t        ctx;
 633         errcode_t       retval;
 634 #ifdef HAVE_SIGNAL_H
 635         struct sigaction        sa;
 636 #endif
 637         char            *extended_opts = 0;
 638         char            *cp;
 639         int             res;            /* result of sscanf */
 640 #ifdef CONFIG_JBD_DEBUG
 641         char            *jbd_debug;
 642 #endif
 643
 644         retval = e2fsck_allocate_context(&ctx);
 645         if (retval)
 646                 return retval;
 647
 648         *ret_ctx = ctx;
 649
 650         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
 651         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
 652         if (isatty(0) && isatty(1)) {
 653                 ctx->interactive = 1;
 654         } else {
 655                 ctx->start_meta[0] = '\001';
 656                 ctx->stop_meta[0] = '\002';
 657         }
 658         memset(bar, '=', sizeof(bar)-1);
 659         memset(spaces, ' ', sizeof(spaces)-1);
 660         add_error_table(&et_ext2_error_table);
 661         add_error_table(&et_prof_error_table);
 662         blkid_get_cache(&ctx->blkid, NULL);
 663
 664         if (argc && *argv)
 665                 ctx->program_name = *argv;
 666         else
 667                 ctx->program_name = "e2fsck";
 668         while ((c = getopt (argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDk")) != EOF)
 669                 switch (c) {
 670                 case 'C':
 671                         ctx->progress = e2fsck_update_progress;
 672                         res = sscanf(optarg, "%d", &ctx->progress_fd);
 673                         if (res != 1)
 674                                 goto sscanf_err;
 675
 676                         if (ctx->progress_fd < 0) {
 677                                 ctx->progress = 0;
 678                                 ctx->progress_fd = ctx->progress_fd * -1;
 679                         }
 680                         if (!ctx->progress_fd)
 681                                 break;
 682                         /* Validate the file descriptor to avoid disasters */
 683                         fd = dup(ctx->progress_fd);
 684                         if (fd < 0) {
 685                                 fprintf(stderr,
 686                                 _("Error validating file descriptor %d: %s\n"),
 687                                         ctx->progress_fd,
 688                                         error_message(errno));
 689                                 fatal_error(ctx,
 690                         _("Invalid completion information file descriptor"));
 691                         } else
 692                                 close(fd);
 693                         break;
 694                 case 'D':
 695                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 696                         break;
 697                 case 'E':
 698                         extended_opts = optarg;
 699                         break;
 700                 case 'p':
 701                 case 'a':
 702                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
 703                         conflict_opt:
 704                                 fatal_error(ctx,
 705         _("Only one of the options -p/-a, -n or -y may be specified."));
 706                         }
 707                         ctx->options |= E2F_OPT_PREEN;
 708                         break;
 709                 case 'n':
 710                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
 711                                 goto conflict_opt;
 712                         ctx->options |= E2F_OPT_NO;
 713                         break;
 714                 case 'y':
 715                         if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
 716                                 goto conflict_opt;
 717                         ctx->options |= E2F_OPT_YES;
 718                         break;
 719                 case 't':
 720 #ifdef RESOURCE_TRACK
 721                         if (ctx->options & E2F_OPT_TIME)
 722                                 ctx->options |= E2F_OPT_TIME2;
 723                         else
 724                                 ctx->options |= E2F_OPT_TIME;
 725 #else
 726                         fprintf(stderr, _("The -t option is not "
 727                                 "supported on this version of e2fsck.\n"));
 728 #endif
 729                         break;
 730                 case 'c':
 731                         if (cflag++)
 732                                 ctx->options |= E2F_OPT_WRITECHECK;
 733                         ctx->options |= E2F_OPT_CHECKBLOCKS;
 734                         break;
 735                 case 'r':
 736                         /* What we do by default, anyway! */
 737                         break;
 738                 case 'b':
 739                         res = sscanf(optarg, "%u", &ctx->use_superblock);
 740                         if (res != 1)
 741                                 goto sscanf_err;
 742                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
 743                         break;
 744                 case 'B':
 745                         ctx->blocksize = atoi(optarg);
 746                         break;
 747                 case 'I':
 748                         res = sscanf(optarg, "%d", &ctx->inode_buffer_blocks);
 749                         if (res != 1)
 750                                 goto sscanf_err;
 751                         break;
 752                 case 'j':
 753                         ctx->journal_name = string_copy(ctx, optarg, 0);
 754                         break;
 755                 case 'P':
 756                         res = sscanf(optarg, "%d", &ctx->process_inode_size);
 757                         if (res != 1)
 758                                 goto sscanf_err;
 759                         break;
 760                 case 'L':
 761                         replace_bad_blocks++;
 762                 case 'l':
 763                         bad_blocks_file = string_copy(ctx, optarg, 0);
 764                         break;
 765                 case 'd':
 766                         ctx->options |= E2F_OPT_DEBUG;
 767                         break;
 768                 case 'f':
 769                         ctx->options |= E2F_OPT_FORCE;
 770                         break;
 771                 case 'F':
 772                         flush = 1;
 773                         break;
 774                 case 'v':
 775                         verbose = 1;
 776                         break;
 777                 case 'V':
 778                         show_version_only = 1;
 779                         break;
 780 #ifdef MTRACE
 781                 case 'M':
 782                         mallwatch = (void *) strtol(optarg, NULL, 0);
 783                         break;
 784 #endif
 785                 case 'N':
 786                         ctx->device_name = string_copy(ctx, optarg, 0);
 787                         break;
 788                 case 'k':
 789                         keep_bad_blocks++;
 790                         break;
 791                 default:
 792                         usage(ctx);
 793                 }
 794         if (show_version_only)
 795                 return 0;
 796         if (optind != argc - 1)
 797                 usage(ctx);
 798         if ((ctx->options & E2F_OPT_NO) &&
 799             (ctx->options & E2F_OPT_COMPRESS_DIRS)) {
 800                 com_err(ctx->program_name, 0,
 801                         _("The -n and -D options are incompatible."));
 802                 fatal_error(ctx, 0);
 803         }
 804         if ((ctx->options & E2F_OPT_NO) && cflag) {
 805                 com_err(ctx->program_name, 0,
 806                         _("The -n and -c options are incompatible."));
 807                 fatal_error(ctx, 0);
 808         }
 809         if ((ctx->options & E2F_OPT_NO) && bad_blocks_file) {
 810                 com_err(ctx->program_name, 0,
 811                         _("The -n and -l/-L options are incompatible."));
 812                 fatal_error(ctx, 0);
 813         }
 814         if (ctx->options & E2F_OPT_NO)
 815                 ctx->options |= E2F_OPT_READONLY;
 816
 817         ctx->io_options = strchr(argv[optind], '?');
 818         if (ctx->io_options)
 819                 *ctx->io_options++ = 0;
 820         ctx->filesystem_name = blkid_get_devname(ctx->blkid, argv[optind], 0);
 821         if (!ctx->filesystem_name) {
 822                 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
 823                         argv[optind]);
 824                 fatal_error(ctx, 0);
 825         }
 826         if (extended_opts)
 827                 parse_extended_opts(ctx, extended_opts);
 828
 829         if ((cp = getenv("E2FSCK_CONFIG")) != NULL)
 830                 config_fn[0] = cp;
 831         profile_set_syntax_err_cb(syntax_err_report);
 832         profile_init(config_fn, &ctx->profile);
 833
 834         if (flush) {
 835                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
 836                 if (fd < 0) {
 837                         com_err("open", errno,
 838                                 _("while opening %s for flushing"),
 839                                 ctx->filesystem_name);
 840                         fatal_error(ctx, 0);
 841                 }
 842                 if ((retval = ext2fs_sync_device(fd, 1))) {
 843                         com_err("ext2fs_sync_device", retval,
 844                                 _("while trying to flush %s"),
 845                                 ctx->filesystem_name);
 846                         fatal_error(ctx, 0);
 847                 }
 848                 close(fd);
 849         }
 850         if (cflag && bad_blocks_file) {
 851                 fprintf(stderr, _("The -c and the -l/-L options may "
 852                                   "not be both used at the same time.\n"));
 853                 exit(FSCK_USAGE);
 854         }
 855 #ifdef HAVE_SIGNAL_H
 856         /*
 857          * Set up signal action
 858          */
 859         memset(&sa, 0, sizeof(struct sigaction));
 860         sa.sa_handler = signal_cancel;
 861         sigaction(SIGINT, &sa, 0);
 862         sigaction(SIGTERM, &sa, 0);
 863 #ifdef SA_RESTART
 864         sa.sa_flags = SA_RESTART;
 865 #endif
 866         e2fsck_global_ctx = ctx;
 867         sa.sa_handler = signal_progress_on;
 868         sigaction(SIGUSR1, &sa, 0);
 869         sa.sa_handler = signal_progress_off;
 870         sigaction(SIGUSR2, &sa, 0);
 871 #endif
 872
 873         /* Update our PATH to include /sbin if we need to run badblocks  */
 874         if (cflag) {
 875                 char *oldpath = getenv("PATH");
 876                 char *newpath;
 877                 int len = sizeof(PATH_SET) + 1;
 878
 879                 if (oldpath)
 880                         len += strlen(oldpath);
 881
 882                 newpath = malloc(len);
 883                 if (!newpath)
 884                         fatal_error(ctx, "Couldn't malloc() newpath");
 885                 strcpy(newpath, PATH_SET);
 886
 887                 if (oldpath) {
 888                         strcat(newpath, ":");
 889                         strcat(newpath, oldpath);
 890                 }
 891                 putenv(newpath);
 892         }
 893 #ifdef CONFIG_JBD_DEBUG
 894         jbd_debug = getenv("E2FSCK_JBD_DEBUG");
 895         if (jbd_debug) {
 896                 res = sscanf(jbd_debug, "%d", &journal_enable_debug);
 897                 if (res != 1) {
 898                         fprintf(stderr,
 899                                 _("E2FSCK_JBD_DEBUG \"%s\" not an integer\n\n"),
 900                                 jbd_debug);
 901                         exit (1);
 902                 }
 903         }
 904 #endif
 905         return 0;
 906
 907 sscanf_err:
 908         fprintf(stderr, _("\nInvalid non-numeric argument to -%c (\"%s\")\n\n"),
 909                 c, optarg);
 910         exit (1);
 911 }
 912
 913 static errcode_t try_open_fs(e2fsck_t ctx, int flags, io_manager io_ptr,
 914                              ext2_filsys *ret_fs)
 915 {
 916         errcode_t retval;
 917
 918         *ret_fs = NULL;
 919         if (ctx->superblock && ctx->blocksize) {
 920                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
 921                                       flags, ctx->superblock, ctx->blocksize,
 922                                       io_ptr, ret_fs);
 923         } else if (ctx->superblock) {
 924                 int blocksize;
 925                 for (blocksize = EXT2_MIN_BLOCK_SIZE;
 926                      blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
 927                         if (*ret_fs) {
 928                                 ext2fs_free(*ret_fs);
 929                                 *ret_fs = NULL;
 930                         }
 931                         retval = ext2fs_open2(ctx->filesystem_name,
 932                                               ctx->io_options, flags,
 933                                               ctx->superblock, blocksize,
 934                                               io_ptr, ret_fs);
 935                         if (!retval)
 936                                 break;
 937                 }
 938         } else
 939                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
 940                                       flags, 0, 0, io_ptr, ret_fs);
 941         return retval;
 942 }
 943
 944
 945 static const char *my_ver_string = E2FSPROGS_VERSION;
 946 static const char *my_ver_date = E2FSPROGS_DATE;
 947
 948 int main (int argc, char *argv[])
 949 {
 950         errcode_t       retval = 0, retval2 = 0, orig_retval = 0;
 951         int             exit_value = FSCK_OK;
 952         ext2_filsys     fs = 0;
 953         io_manager      io_ptr;
 954         struct ext2_super_block *sb;
 955         const char      *lib_ver_date;
 956         int             my_ver, lib_ver;
 957         e2fsck_t        ctx;
 958         blk_t           orig_superblock;
 959         struct problem_context pctx;
 960         int flags, run_result;
 961         int journal_size;
 962         int sysval, sys_page_size = 4096;
 963         __u32 features[3];
 964         char *cp;
 965
 966         clear_problem_context(&pctx);
 967 #ifdef MTRACE
 968         mtrace();
 969 #endif
 970 #ifdef MCHECK
 971         mcheck(0);
 972 #endif
 973 #ifdef ENABLE_NLS
 974         setlocale(LC_MESSAGES, "");
 975         setlocale(LC_CTYPE, "");
 976         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 977         textdomain(NLS_CAT_NAME);
 978 #endif
 979         my_ver = ext2fs_parse_version_string(my_ver_string);
 980         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
 981         if (my_ver > lib_ver) {
 982                 fprintf( stderr, _("Error: ext2fs library version "
 983                         "out of date!\n"));
 984                 show_version_only++;
 985         }
 986
 987         retval = PRS(argc, argv, &ctx);
 988         if (retval) {
 989                 com_err("e2fsck", retval,
 990                         _("while trying to initialize program"));
 991                 exit(FSCK_ERROR);
 992         }
 993         reserve_stdio_fds();
 994
 995         init_resource_track(&ctx->global_rtrack, NULL);
 996         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
 997                 fprintf(stderr, "e2fsck %s (%s)\n", my_ver_string,
 998                          my_ver_date);
 999
1000         if (show_version_only) {
1001                 fprintf(stderr, _("\tUsing %s, %s\n"),
1002                         error_message(EXT2_ET_BASE), lib_ver_date);
1003                 exit(FSCK_OK);
1004         }
1005
1006         check_mount(ctx);
1007
1008         if (!(ctx->options & E2F_OPT_PREEN) &&
1009             !(ctx->options & E2F_OPT_NO) &&
1010             !(ctx->options & E2F_OPT_YES)) {
1011                 if (!ctx->interactive)
1012                         fatal_error(ctx,
1013                                     _("need terminal for interactive repairs"));
1014         }
1015         ctx->superblock = ctx->use_superblock;
1016 restart:
1017 #ifdef CONFIG_TESTIO_DEBUG
1018         if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
1019                 io_ptr = test_io_manager;
1020                 test_io_backing_manager = unix_io_manager;
1021         } else
1022 #endif
1023                 io_ptr = unix_io_manager;
1024         flags = EXT2_FLAG_NOFREE_ON_ERROR;
1025         if ((ctx->options & E2F_OPT_READONLY) == 0)
1026                 flags |= EXT2_FLAG_RW;
1027         if ((ctx->mount_flags & EXT2_MF_MOUNTED) == 0)
1028                 flags |= EXT2_FLAG_EXCLUSIVE;
1029
1030         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1031
1032         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
1033             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
1034             ((retval == EXT2_ET_BAD_MAGIC) ||
1035              (retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
1036              ((retval == 0) && (retval2 = ext2fs_check_desc(fs))))) {
1037                 if (retval2 == ENOMEM) {
1038                         retval = retval2;
1039                         goto failure;
1040                 }
1041                 if (fs->flags & EXT2_FLAG_NOFREE_ON_ERROR) {
1042                         ext2fs_free(fs);
1043                         fs = NULL;
1044                 }
1045                 if (!fs || (fs->group_desc_count > 1)) {
1046                         printf(_("%s: %s trying backup blocks...\n"),
1047                                ctx->program_name,
1048                                retval ? _("Superblock invalid,") :
1049                                _("Group descriptors look bad..."));
1050                         orig_superblock = ctx->superblock;
1051                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
1052                         if (fs)
1053                                 ext2fs_close(fs);
1054                         orig_retval = retval;
1055                         retval = try_open_fs(ctx, flags, io_ptr, &fs);
1056                         if ((orig_retval == 0) && retval != 0) {
1057                                 com_err(ctx->program_name, retval,
1058                                         "when using the backup blocks");
1059                                 printf(_("%s: going back to original "
1060                                          "superblock\n"), ctx->program_name);
1061                                 ctx->superblock = orig_superblock;
1062                                 retval = try_open_fs(ctx, flags, io_ptr, &fs);
1063                         }
1064                 }
1065         }
1066         if (((retval == EXT2_ET_UNSUPP_FEATURE) ||
1067              (retval == EXT2_ET_RO_UNSUPP_FEATURE)) &&
1068             fs && fs->super) {
1069                 sb = fs->super;
1070                 features[0] = (sb->s_feature_compat &
1071                                ~EXT2_LIB_FEATURE_COMPAT_SUPP);
1072                 features[1] = (sb->s_feature_incompat &
1073                                ~EXT2_LIB_FEATURE_INCOMPAT_SUPP);
1074                 features[2] = (sb->s_feature_ro_compat &
1075                                ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1076                 if (features[0] || features[1] || features[2])
1077                         goto print_unsupp_features;
1078         }
1079 failure:
1080         if (retval) {
1081                 if (orig_retval)
1082                         retval = orig_retval;
1083                 com_err(ctx->program_name, retval, _("while trying to open %s"),
1084                         ctx->filesystem_name);
1085                 if (retval == EXT2_ET_REV_TOO_HIGH) {
1086                         printf(_("The filesystem revision is apparently "
1087                                "too high for this version of e2fsck.\n"
1088                                "(Or the filesystem superblock "
1089                                "is corrupt)\n\n"));
1090                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1091                 } else if (retval == EXT2_ET_SHORT_READ)
1092                         printf(_("Could this be a zero-length partition?\n"));
1093                 else if ((retval == EPERM) || (retval == EACCES))
1094                         printf(_("You must have %s access to the "
1095                                "filesystem or be root\n"),
1096                                (ctx->options & E2F_OPT_READONLY) ?
1097                                "r/o" : "r/w");
1098                 else if (retval == ENXIO)
1099                         printf(_("Possibly non-existent or swap device?\n"));
1100                 else if (retval == EBUSY)
1101                         printf(_("Filesystem mounted or opened exclusively "
1102                                  "by another program?\n"));
1103 #ifdef EROFS
1104                 else if (retval == EROFS)
1105                         printf(_("Disk write-protected; use the -n option "
1106                                "to do a read-only\n"
1107                                "check of the device.\n"));
1108 #endif
1109                 else
1110                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1111                 fatal_error(ctx, 0);
1112         }
1113         /*
1114          * We only update the master superblock because (a) paranoia;
1115          * we don't want to corrupt the backup superblocks, and (b) we
1116          * don't need to update the mount count and last checked
1117          * fields in the backup superblock (the kernel doesn't update
1118          * the backup superblocks anyway).  With newer versions of the
1119          * library this flag is set by ext2fs_open2(), but we set this
1120          * here just to be sure.  (No, we don't support e2fsck running
1121          * with some other libext2fs than the one that it was shipped
1122          * with, but just in case....)
1123          */
1124         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
1125
1126         if (!(ctx->flags & E2F_FLAG_GOT_DEVSIZE)) {
1127                 __u32 blocksize = EXT2_BLOCK_SIZE(fs->super);
1128                 int need_restart = 0;
1129
1130                 pctx.errcode = ext2fs_get_device_size2(ctx->filesystem_name,
1131                                                        blocksize,
1132                                                        &ctx->num_blocks);
1133                 /*
1134                  * The floppy driver refuses to allow anyone else to
1135                  * open the device if has been opened with O_EXCL;
1136                  * this is unlike other block device drivers in Linux.
1137                  * To handle this, we close the filesystem and then
1138                  * reopen the filesystem after we get the device size.
1139                  */
1140                 if (pctx.errcode == EBUSY) {
1141                         ext2fs_close(fs);
1142                         need_restart++;
1143                         pctx.errcode =
1144                                 ext2fs_get_device_size2(ctx->filesystem_name,
1145                                                         blocksize,
1146                                                         &ctx->num_blocks);
1147                 }
1148                 if (pctx.errcode == EXT2_ET_UNIMPLEMENTED)
1149                         ctx->num_blocks = 0;
1150                 else if (pctx.errcode) {
1151                         fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
1152                         ctx->flags |= E2F_FLAG_ABORT;
1153                         fatal_error(ctx, 0);
1154                 }
1155                 ctx->flags |= E2F_FLAG_GOT_DEVSIZE;
1156                 if (need_restart)
1157                         goto restart;
1158         }
1159
1160         ctx->fs = fs;
1161         fs->priv_data = ctx;
1162         fs->now = ctx->now;
1163         sb = fs->super;
1164         if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
1165                 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
1166                         _("while trying to open %s"),
1167                         ctx->filesystem_name);
1168         get_newer:
1169                 fatal_error(ctx, _("Get a newer version of e2fsck!"));
1170         }
1171
1172         /*
1173          * Set the device name, which is used whenever we print error
1174          * or informational messages to the user.
1175          */
1176         if (ctx->device_name == 0 &&
1177             (sb->s_volume_name[0] != 0)) {
1178                 ctx->device_name = string_copy(ctx, sb->s_volume_name,
1179                                                sizeof(sb->s_volume_name));
1180         }
1181         if (ctx->device_name == 0)
1182                 ctx->device_name = string_copy(ctx, ctx->filesystem_name, 0);
1183         for (cp = ctx->device_name; *cp; cp++)
1184                 if (isspace(*cp) || *cp == ':')
1185                         *cp = '_';
1186
1187         ehandler_init(fs->io);
1188
1189         if ((ctx->mount_flags & EXT2_MF_MOUNTED) &&
1190             !(sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER))
1191                 goto skip_journal;
1192
1193         /*
1194          * Make sure the ext3 superblock fields are consistent.
1195          */
1196         retval = e2fsck_check_ext3_journal(ctx);
1197         if (retval) {
1198                 com_err(ctx->program_name, retval,
1199                         _("while checking ext3 journal for %s"),
1200                         ctx->device_name);
1201                 fatal_error(ctx, 0);
1202         }
1203
1204         /*
1205          * Check to see if we need to do ext3-style recovery.  If so,
1206          * do it, and then restart the fsck.
1207          */
1208         if (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) {
1209                 if (ctx->options & E2F_OPT_READONLY) {
1210                         printf(_("Warning: skipping journal recovery "
1211                                  "because doing a read-only filesystem "
1212                                  "check.\n"));
1213                         io_channel_flush(ctx->fs->io);
1214                 } else {
1215                         if (ctx->flags & E2F_FLAG_RESTARTED) {
1216                                 /*
1217                                  * Whoops, we attempted to run the
1218                                  * journal twice.  This should never
1219                                  * happen, unless the hardware or
1220                                  * device driver is being bogus.
1221                                  */
1222                                 com_err(ctx->program_name, 0,
1223                                         _("unable to set superblock flags on %s\n"), ctx->device_name);
1224                                 fatal_error(ctx, 0);
1225                         }
1226                         retval = e2fsck_run_ext3_journal(ctx);
1227                         if (retval) {
1228                                 com_err(ctx->program_name, retval,
1229                                 _("while recovering ext3 journal of %s"),
1230                                         ctx->device_name);
1231                                 fatal_error(ctx, 0);
1232                         }
1233                         ext2fs_close(ctx->fs);
1234                         ctx->fs = 0;
1235                         ctx->flags |= E2F_FLAG_RESTARTED;
1236                         goto restart;
1237                 }
1238         }
1239
1240 skip_journal:
1241         /*
1242          * Check for compatibility with the feature sets.  We need to
1243          * be more stringent than ext2fs_open().
1244          */
1245         features[0] = sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP;
1246         features[1] = sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP;
1247         features[2] = (sb->s_feature_ro_compat &
1248                        ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1249 print_unsupp_features:
1250         if (features[0] || features[1] || features[2]) {
1251                 int     i, j;
1252                 __u32   *mask = features, m;
1253
1254                 fprintf(stderr, _("%s has unsupported feature(s):"),
1255                         ctx->filesystem_name);
1256
1257                 for (i=0; i <3; i++,mask++) {
1258                         for (j=0,m=1; j < 32; j++, m<<=1) {
1259                                 if (*mask & m)
1260                                         fprintf(stderr, " %s",
1261                                                 e2p_feature2string(i, m));
1262                         }
1263                 }
1264                 putc('\n', stderr);
1265                 goto get_newer;
1266         }
1267 #ifdef ENABLE_COMPRESSION
1268         if (sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_COMPRESSION)
1269                 com_err(ctx->program_name, 0,
1270                         _("Warning: compression support is experimental.\n"));
1271 #endif
1272 #ifndef ENABLE_HTREE
1273         if (sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) {
1274                 com_err(ctx->program_name, 0,
1275                         _("E2fsck not compiled with HTREE support,\n\t"
1276                           "but filesystem %s has HTREE directories.\n"),
1277                         ctx->device_name);
1278                 goto get_newer;
1279         }
1280 #endif
1281
1282         /*
1283          * If the user specified a specific superblock, presumably the
1284          * master superblock has been trashed.  So we mark the
1285          * superblock as dirty, so it can be written out.
1286          */
1287         if (ctx->superblock &&
1288             !(ctx->options & E2F_OPT_READONLY))
1289                 ext2fs_mark_super_dirty(fs);
1290
1291         /*
1292          * Calculate the number of filesystem blocks per pagesize.  If
1293          * fs->blocksize > page_size, set the number of blocks per
1294          * pagesize to 1 to avoid division by zero errors.
1295          */
1296 #ifdef _SC_PAGESIZE
1297         sysval = sysconf(_SC_PAGESIZE);
1298         if (sysval > 0)
1299                 sys_page_size = sysval;
1300 #endif /* _SC_PAGESIZE */
1301         ctx->blocks_per_page = sys_page_size / fs->blocksize;
1302         if (ctx->blocks_per_page == 0)
1303                 ctx->blocks_per_page = 1;
1304
1305         if (ctx->superblock)
1306                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
1307         ext2fs_mark_valid(fs);
1308         check_super_block(ctx);
1309         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1310                 fatal_error(ctx, 0);
1311         check_if_skip(ctx);
1312         check_resize_inode(ctx);
1313         if (bad_blocks_file)
1314                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
1315         else if (cflag)
1316                 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
1317         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1318                 fatal_error(ctx, 0);
1319
1320         /*
1321          * Mark the system as valid, 'til proven otherwise
1322          */
1323         ext2fs_mark_valid(fs);
1324
1325         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
1326         if (retval) {
1327                 com_err(ctx->program_name, retval,
1328                         _("while reading bad blocks inode"));
1329                 preenhalt(ctx);
1330                 printf(_("This doesn't bode well,"
1331                          " but we'll try to go on...\n"));
1332         }
1333
1334         /*
1335          * Save the journal size in megabytes.
1336          * Try and use the journal size from the backup else let e2fsck
1337          * find the default journal size.
1338          */
1339         if (sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS)
1340                 journal_size = sb->s_jnl_blocks[16] >> 20;
1341         else
1342                 journal_size = -1;
1343
1344         run_result = e2fsck_run(ctx);
1345         e2fsck_clear_progbar(ctx);
1346
1347         if (ctx->flags & E2F_FLAG_JOURNAL_INODE) {
1348                 if (fix_problem(ctx, PR_6_RECREATE_JOURNAL, &pctx)) {
1349                         if (journal_size < 1024)
1350                                 journal_size = ext2fs_default_journal_size(fs->super->s_blocks_count);
1351                         if (journal_size < 0) {
1352                                 fs->super->s_feature_compat &=
1353                                         ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
1354                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1355                                 com_err(ctx->program_name, 0,
1356                                         _("Couldn't determine journal size"));
1357                                 goto no_journal;
1358                         }
1359                         printf(_("Creating journal (%d blocks): "),
1360                                journal_size);
1361                         fflush(stdout);
1362                         retval = ext2fs_add_journal_inode(fs,
1363                                                           journal_size, 0);
1364                         if (retval) {
1365                                 com_err("Error ", retval,
1366                                         _("\n\twhile trying to create journal"));
1367                                 goto no_journal;
1368                         }
1369                         printf(_(" Done.\n"));
1370                         printf(_("\n*** journal has been re-created - "
1371                                        "filesystem is now ext3 again ***\n"));
1372                 }
1373         }
1374 no_journal:
1375
1376         if (run_result == E2F_FLAG_RESTART) {
1377                 printf(_("Restarting e2fsck from the beginning...\n"));
1378                 retval = e2fsck_reset_context(ctx);
1379                 if (retval) {
1380                         com_err(ctx->program_name, retval,
1381                                 _("while resetting context"));
1382                         fatal_error(ctx, 0);
1383                 }
1384                 ext2fs_close(fs);
1385                 goto restart;
1386         }
1387         if (run_result & E2F_FLAG_CANCEL) {
1388                 printf(_("%s: e2fsck canceled.\n"), ctx->device_name ?
1389                        ctx->device_name : ctx->filesystem_name);
1390                 exit_value |= FSCK_CANCELED;
1391         }
1392         if (run_result & E2F_FLAG_ABORT)
1393                 fatal_error(ctx, _("aborted"));
1394         if (check_backup_super_block(ctx)) {
1395                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1396                 ext2fs_mark_super_dirty(fs);
1397         }
1398
1399 #ifdef MTRACE
1400         mtrace_print("Cleanup");
1401 #endif
1402         if (ext2fs_test_changed(fs)) {
1403                 exit_value |= FSCK_NONDESTRUCT;
1404                 if (!(ctx->options & E2F_OPT_PREEN))
1405                     printf(_("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
1406                                ctx->device_name);
1407                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
1408                         printf(_("%s: ***** REBOOT LINUX *****\n"),
1409                                ctx->device_name);
1410                         exit_value |= FSCK_REBOOT;
1411                 }
1412         }
1413         if (!ext2fs_test_valid(fs) ||
1414             ((exit_value & FSCK_CANCELED) &&
1415              (sb->s_state & EXT2_ERROR_FS))) {
1416                 printf(_("\n%s: ********** WARNING: Filesystem still has "
1417                          "errors **********\n\n"), ctx->device_name);
1418                 exit_value |= FSCK_UNCORRECTED;
1419                 exit_value &= ~FSCK_NONDESTRUCT;
1420         }
1421         if (exit_value & FSCK_CANCELED) {
1422                 int     allow_cancellation;
1423
1424                 profile_get_boolean(ctx->profile, "options",
1425                                     "allow_cancellation", 0, 0,
1426                                     &allow_cancellation);
1427                 exit_value &= ~FSCK_NONDESTRUCT;
1428                 if (allow_cancellation && ext2fs_test_valid(fs) &&
1429                     (sb->s_state & EXT2_VALID_FS) &&
1430                     !(sb->s_state & EXT2_ERROR_FS))
1431                         exit_value = 0;
1432         } else {
1433                 show_stats(ctx);
1434                 if (!(ctx->options & E2F_OPT_READONLY)) {
1435                         if (ext2fs_test_valid(fs)) {
1436                                 if (!(sb->s_state & EXT2_VALID_FS))
1437                                         exit_value |= FSCK_NONDESTRUCT;
1438                                 sb->s_state = EXT2_VALID_FS;
1439                         } else
1440                                 sb->s_state &= ~EXT2_VALID_FS;
1441                         sb->s_mnt_count = 0;
1442                         if (!(ctx->flags & E2F_FLAG_TIME_INSANE))
1443                                 sb->s_lastcheck = ctx->now;
1444                         memset(((char *) sb) + EXT4_S_ERR_START, 0,
1445                                EXT4_S_ERR_LEN);
1446                         ext2fs_mark_super_dirty(fs);
1447                 }
1448         }
1449
1450         if ((run_result & E2F_FLAG_CANCEL) == 0 &&
1451             sb->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM &&
1452             !(ctx->options & E2F_OPT_READONLY)) {
1453                 retval = ext2fs_set_gdt_csum(ctx->fs);
1454                 if (retval) {
1455                         com_err(ctx->program_name, retval,
1456                                 _("while setting block group checksum info"));
1457                         fatal_error(ctx, 0);
1458                 }
1459         }
1460
1461         e2fsck_write_bitmaps(ctx);
1462         io_channel_flush(ctx->fs->io);
1463         print_resource_track(ctx, NULL, &ctx->global_rtrack, ctx->fs->io);
1464
1465         ext2fs_close(fs);
1466         ctx->fs = NULL;
1467         free(ctx->journal_name);
1468
1469         e2fsck_free_context(ctx);
1470         remove_error_table(&et_ext2_error_table);
1471         remove_error_table(&et_prof_error_table);
1472         return exit_value;
1473 }