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;
 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 = (10000 * ctx->fs_fragmented) / inodes_used;
 121         frag_percent = (frag_percent + 5) / 10;
 122
 123         if (!verbose) {
 124                 printf(_("%s: %u/%u files (%0d.%d%% non-contiguous), %u/%u blocks\n"),
 125                        ctx->device_name, inodes_used, inodes,
 126                        frag_percent / 10, frag_percent % 10,
 127                        blocks_used, blocks);
 128                 return;
 129         }
 130         printf (P_("\n%8u inode used (%2.2f%%)\n", "\n%8u inodes used (%2.2f%%)\n",
 131                    inodes_used), inodes_used, 100.0 * inodes_used / inodes);
 132         printf (P_("%8u non-contiguous inode (%0d.%d%%)\n",
 133                    "%8u non-contiguous inodes (%0d.%d%%)\n",
 134                    ctx->fs_fragmented),
 135                 ctx->fs_fragmented, frag_percent / 10, frag_percent % 10);
 136         printf (_("         # of inodes with ind/dind/tind blocks: %u/%u/%u\n"),
 137                 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
 138
 139         for (j=MAX_EXTENT_DEPTH_COUNT-1; j >=0; j--)
 140                 if (ctx->extent_depth_count[j])
 141                         break;
 142         if (++j) {
 143                 printf (_("         Extent depth histogram: "));
 144                 for (i=0; i < j; i++) {
 145                         if (i)
 146                                 fputc('/', stdout);
 147                         printf("%u", ctx->extent_depth_count[i]);
 148                 }
 149                 fputc('\n', stdout);
 150         }
 151
 152         printf (P_("%8u block used (%2.2f%%)\n", "%8u blocks used (%2.2f%%)\n",
 153                    blocks_used), blocks_used, 100.0 * blocks_used / blocks);
 154         printf (P_("%8u bad block\n", "%8u bad blocks\n",
 155                    ctx->fs_badblocks_count), ctx->fs_badblocks_count);
 156         printf (P_("%8u large file\n", "%8u large files\n",
 157                    ctx->large_files), ctx->large_files);
 158         printf (P_("\n%8u regular file\n", "\n%8u regular files\n",
 159                    ctx->fs_regular_count), ctx->fs_regular_count);
 160         printf (P_("%8u directory\n", "%8u directories\n",
 161                    ctx->fs_directory_count), ctx->fs_directory_count);
 162         printf (P_("%8u character device file\n",
 163                    "%8u character device files\n", ctx->fs_chardev_count),
 164                 ctx->fs_chardev_count);
 165         printf (P_("%8u block device file\n", "%8u block device files\n",
 166                    ctx->fs_blockdev_count), ctx->fs_blockdev_count);
 167         printf (P_("%8u fifo\n", "%8u fifos\n", ctx->fs_fifo_count),
 168                 ctx->fs_fifo_count);
 169         printf (P_("%8u link\n", "%8u links\n",
 170                    ctx->fs_links_count - dir_links),
 171                 ctx->fs_links_count - dir_links);
 172         printf (P_("%8u symbolic link", "%8u symbolic links",
 173                    ctx->fs_symlinks_count), ctx->fs_symlinks_count);
 174         printf (P_(" (%u fast symbolic link)\n", " (%u fast symbolic links)\n",
 175                    ctx->fs_fast_symlinks_count), ctx->fs_fast_symlinks_count);
 176         printf (P_("%8u socket\n", "%8u sockets\n", ctx->fs_sockets_count),
 177                 ctx->fs_sockets_count);
 178         printf ("--------\n");
 179         printf (P_("%8u file\n", "%8u files\n",
 180                    ctx->fs_total_count - dir_links),
 181                 ctx->fs_total_count - dir_links);
 182 }
 183
 184 static void check_mount(e2fsck_t ctx)
 185 {
 186         errcode_t       retval;
 187         int             cont;
 188
 189         retval = ext2fs_check_if_mounted(ctx->filesystem_name,
 190                                          &ctx->mount_flags);
 191         if (retval) {
 192                 com_err("ext2fs_check_if_mount", retval,
 193                         _("while determining whether %s is mounted."),
 194                         ctx->filesystem_name);
 195                 return;
 196         }
 197
 198         /*
 199          * If the filesystem isn't mounted, or it's the root
 200          * filesystem and it's mounted read-only, and we're not doing
 201          * a read/write check, then everything's fine.
 202          */
 203         if ((!(ctx->mount_flags & EXT2_MF_MOUNTED)) ||
 204             ((ctx->mount_flags & EXT2_MF_ISROOT) &&
 205              (ctx->mount_flags & EXT2_MF_READONLY) &&
 206              !(ctx->options & E2F_OPT_WRITECHECK)))
 207                 return;
 208
 209         if ((ctx->options & E2F_OPT_READONLY) &&
 210             !(ctx->options & E2F_OPT_WRITECHECK)) {
 211                 printf(_("Warning!  %s is mounted.\n"), ctx->filesystem_name);
 212                 return;
 213         }
 214
 215         printf(_("%s is mounted.  "), ctx->filesystem_name);
 216         if (!ctx->interactive)
 217                 fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
 218         printf(_("\n\n\007\007\007\007WARNING!!!  "
 219                "Running e2fsck on a mounted filesystem may cause\n"
 220                "SEVERE filesystem damage.\007\007\007\n\n"));
 221         cont = ask_yn(_("Do you really want to continue"), -1);
 222         if (!cont) {
 223                 printf (_("check aborted.\n"));
 224                 exit (0);
 225         }
 226         return;
 227 }
 228
 229 static int is_on_batt(void)
 230 {
 231         FILE    *f;
 232         DIR     *d;
 233         char    tmp[80], tmp2[80], fname[80];
 234         unsigned int    acflag;
 235         struct dirent*  de;
 236
 237         f = fopen("/proc/apm", "r");
 238         if (f) {
 239                 if (fscanf(f, "%s %s %s %x", tmp, tmp, tmp, &acflag) != 4)
 240                         acflag = 1;
 241                 fclose(f);
 242                 return (acflag != 1);
 243         }
 244         d = opendir("/proc/acpi/ac_adapter");
 245         if (d) {
 246                 while ((de=readdir(d)) != NULL) {
 247                         if (!strncmp(".", de->d_name, 1))
 248                                 continue;
 249                         snprintf(fname, 80, "/proc/acpi/ac_adapter/%s/state",
 250                                  de->d_name);
 251                         f = fopen(fname, "r");
 252                         if (!f)
 253                                 continue;
 254                         if (fscanf(f, "%s %s", tmp2, tmp) != 2)
 255                                 tmp[0] = 0;
 256                         fclose(f);
 257                         if (strncmp(tmp, "off-line", 8) == 0) {
 258                                 closedir(d);
 259                                 return 1;
 260                         }
 261                 }
 262                 closedir(d);
 263         }
 264         return 0;
 265 }
 266
 267 /*
 268  * This routine checks to see if a filesystem can be skipped; if so,
 269  * it will exit with E2FSCK_OK.  Under some conditions it will print a
 270  * message explaining why a check is being forced.
 271  */
 272 static void check_if_skip(e2fsck_t ctx)
 273 {
 274         ext2_filsys fs = ctx->fs;
 275         const char *reason = NULL;
 276         unsigned int reason_arg = 0;
 277         long next_check;
 278         int batt = is_on_batt();
 279         int defer_check_on_battery;
 280         time_t lastcheck;
 281
 282         profile_get_boolean(ctx->profile, "options",
 283                             "defer_check_on_battery", 0, 1,
 284                             &defer_check_on_battery);
 285         if (!defer_check_on_battery)
 286                 batt = 0;
 287
 288         if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file || cflag)
 289                 return;
 290
 291         lastcheck = fs->super->s_lastcheck;
 292         if (lastcheck > ctx->now)
 293                 lastcheck -= ctx->time_fudge;
 294         if ((fs->super->s_state & EXT2_ERROR_FS) ||
 295             !ext2fs_test_valid(fs))
 296                 reason = _(" contains a file system with errors");
 297         else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
 298                 reason = _(" was not cleanly unmounted");
 299         else if (check_backup_super_block(ctx))
 300                 reason = _(" primary superblock features different from backup");
 301         else if ((fs->super->s_max_mnt_count > 0) &&
 302                  (fs->super->s_mnt_count >=
 303                   (unsigned) fs->super->s_max_mnt_count)) {
 304                 reason = _(" has been mounted %u times without being checked");
 305                 reason_arg = fs->super->s_mnt_count;
 306                 if (batt && (fs->super->s_mnt_count <
 307                              (unsigned) fs->super->s_max_mnt_count*2))
 308                         reason = 0;
 309         } else if (fs->super->s_checkinterval && (ctx->now < lastcheck)) {
 310                 reason = _(" has filesystem last checked time in the future");
 311                 if (batt)
 312                         reason = 0;
 313         } else if (fs->super->s_checkinterval &&
 314                    ((ctx->now - lastcheck) >=
 315                     ((time_t) fs->super->s_checkinterval))) {
 316                 reason = _(" has gone %u days without being checked");
 317                 reason_arg = (ctx->now - fs->super->s_lastcheck)/(3600*24);
 318                 if (batt && ((ctx->now - fs->super->s_lastcheck) <
 319                              fs->super->s_checkinterval*2))
 320                         reason = 0;
 321         }
 322         if (reason) {
 323                 fputs(ctx->device_name, stdout);
 324                 printf(reason, reason_arg);
 325                 fputs(_(", check forced.\n"), stdout);
 326                 return;
 327         }
 328         printf(_("%s: clean, %u/%u files, %u/%u blocks"), ctx->device_name,
 329                fs->super->s_inodes_count - fs->super->s_free_inodes_count,
 330                fs->super->s_inodes_count,
 331                fs->super->s_blocks_count - fs->super->s_free_blocks_count,
 332                fs->super->s_blocks_count);
 333         next_check = 100000;
 334         if (fs->super->s_max_mnt_count > 0) {
 335                 next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count;
 336                 if (next_check <= 0)
 337                         next_check = 1;
 338         }
 339         if (fs->super->s_checkinterval &&
 340             ((ctx->now - fs->super->s_lastcheck) >= fs->super->s_checkinterval))
 341                 next_check = 1;
 342         if (next_check <= 5) {
 343                 if (next_check == 1) {
 344                         if (batt)
 345                                 fputs(_(" (check deferred; on battery)"),
 346                                       stdout);
 347                         else
 348                                 fputs(_(" (check after next mount)"), stdout);
 349                 } else
 350                         printf(_(" (check in %ld mounts)"), next_check);
 351         }
 352         fputc('\n', stdout);
 353         ext2fs_close(fs);
 354         ctx->fs = NULL;
 355         e2fsck_free_context(ctx);
 356         exit(FSCK_OK);
 357 }
 358
 359 /*
 360  * For completion notice
 361  */
 362 struct percent_tbl {
 363         int     max_pass;
 364         int     table[32];
 365 };
 366 struct percent_tbl e2fsck_tbl = {
 367         5, { 0, 70, 90, 92,  95, 100 }
 368 };
 369 static char bar[128], spaces[128];
 370
 371 static float calc_percent(struct percent_tbl *tbl, int pass, int curr,
 372                           int max)
 373 {
 374         float   percent;
 375
 376         if (pass <= 0)
 377                 return 0.0;
 378         if (pass > tbl->max_pass || max == 0)
 379                 return 100.0;
 380         percent = ((float) curr) / ((float) max);
 381         return ((percent * (tbl->table[pass] - tbl->table[pass-1]))
 382                 + tbl->table[pass-1]);
 383 }
 384
 385 extern void e2fsck_clear_progbar(e2fsck_t ctx)
 386 {
 387         if (!(ctx->flags & E2F_FLAG_PROG_BAR))
 388                 return;
 389
 390         printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80),
 391                ctx->stop_meta);
 392         fflush(stdout);
 393         ctx->flags &= ~E2F_FLAG_PROG_BAR;
 394 }
 395
 396 int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent,
 397                            unsigned int dpynum)
 398 {
 399         static const char spinner[] = "\\|/-";
 400         int     i;
 401         unsigned int    tick;
 402         struct timeval  tv;
 403         int dpywidth;
 404         int fixed_percent;
 405
 406         if (ctx->flags & E2F_FLAG_PROG_SUPPRESS)
 407                 return 0;
 408
 409         /*
 410          * Calculate the new progress position.  If the
 411          * percentage hasn't changed, then we skip out right
 412          * away.
 413          */
 414         fixed_percent = (int) ((10 * percent) + 0.5);
 415         if (ctx->progress_last_percent == fixed_percent)
 416                 return 0;
 417         ctx->progress_last_percent = fixed_percent;
 418
 419         /*
 420          * If we've already updated the spinner once within
 421          * the last 1/8th of a second, no point doing it
 422          * again.
 423          */
 424         gettimeofday(&tv, NULL);
 425         tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8));
 426         if ((tick == ctx->progress_last_time) &&
 427             (fixed_percent != 0) && (fixed_percent != 1000))
 428                 return 0;
 429         ctx->progress_last_time = tick;
 430
 431         /*
 432          * Advance the spinner, and note that the progress bar
 433          * will be on the screen
 434          */
 435         ctx->progress_pos = (ctx->progress_pos+1) & 3;
 436         ctx->flags |= E2F_FLAG_PROG_BAR;
 437
 438         dpywidth = 66 - strlen(label);
 439         dpywidth = 8 * (dpywidth / 8);
 440         if (dpynum)
 441                 dpywidth -= 8;
 442
 443         i = ((percent * dpywidth) + 50) / 100;
 444         printf("%s%s: |%s%s", ctx->start_meta, label,
 445                bar + (sizeof(bar) - (i+1)),
 446                spaces + (sizeof(spaces) - (dpywidth - i + 1)));
 447         if (fixed_percent == 1000)
 448                 fputc('|', stdout);
 449         else
 450                 fputc(spinner[ctx->progress_pos & 3], stdout);
 451         printf(" %4.1f%%  ", percent);
 452         if (dpynum)
 453                 printf("%u\r", dpynum);
 454         else
 455                 fputs(" \r", stdout);
 456         fputs(ctx->stop_meta, stdout);
 457
 458         if (fixed_percent == 1000)
 459                 e2fsck_clear_progbar(ctx);
 460         fflush(stdout);
 461
 462         return 0;
 463 }
 464
 465 static int e2fsck_update_progress(e2fsck_t ctx, int pass,
 466                                   unsigned long cur, unsigned long max)
 467 {
 468         char buf[1024];
 469         float percent;
 470
 471         if (pass == 0)
 472                 return 0;
 473
 474         if (ctx->progress_fd) {
 475                 snprintf(buf, sizeof(buf), "%d %lu %lu %s\n",
 476                          pass, cur, max, ctx->device_name);
 477                 write(ctx->progress_fd, buf, strlen(buf));
 478         } else {
 479                 percent = calc_percent(&e2fsck_tbl, pass, cur, max);
 480                 e2fsck_simple_progress(ctx, ctx->device_name,
 481                                        percent, 0);
 482         }
 483         return 0;
 484 }
 485
 486 #define PATH_SET "PATH=/sbin"
 487
 488 static void reserve_stdio_fds(void)
 489 {
 490         int     fd;
 491
 492         while (1) {
 493                 fd = open("/dev/null", O_RDWR);
 494                 if (fd > 2)
 495                         break;
 496                 if (fd < 0) {
 497                         fprintf(stderr, _("ERROR: Couldn't open "
 498                                 "/dev/null (%s)\n"),
 499                                 strerror(errno));
 500                         break;
 501                 }
 502         }
 503         close(fd);
 504 }
 505
 506 #ifdef HAVE_SIGNAL_H
 507 static void signal_progress_on(int sig EXT2FS_ATTR((unused)))
 508 {
 509         e2fsck_t ctx = e2fsck_global_ctx;
 510
 511         if (!ctx)
 512                 return;
 513
 514         ctx->progress = e2fsck_update_progress;
 515 }
 516
 517 static void signal_progress_off(int sig EXT2FS_ATTR((unused)))
 518 {
 519         e2fsck_t ctx = e2fsck_global_ctx;
 520
 521         if (!ctx)
 522                 return;
 523
 524         e2fsck_clear_progbar(ctx);
 525         ctx->progress = 0;
 526 }
 527
 528 static void signal_cancel(int sig EXT2FS_ATTR((unused)))
 529 {
 530         e2fsck_t ctx = e2fsck_global_ctx;
 531
 532         if (!ctx)
 533                 exit(FSCK_CANCELED);
 534
 535         ctx->flags |= E2F_FLAG_CANCEL;
 536 }
 537 #endif
 538
 539 static void parse_extended_opts(e2fsck_t ctx, const char *opts)
 540 {
 541         char    *buf, *token, *next, *p, *arg;
 542         int     ea_ver;
 543         int     extended_usage = 0;
 544
 545         buf = string_copy(ctx, opts, 0);
 546         for (token = buf; token && *token; token = next) {
 547                 p = strchr(token, ',');
 548                 next = 0;
 549                 if (p) {
 550                         *p = 0;
 551                         next = p+1;
 552                 }
 553                 arg = strchr(token, '=');
 554                 if (arg) {
 555                         *arg = 0;
 556                         arg++;
 557                 }
 558                 if (strcmp(token, "ea_ver") == 0) {
 559                         if (!arg) {
 560                                 extended_usage++;
 561                                 continue;
 562                         }
 563                         ea_ver = strtoul(arg, &p, 0);
 564                         if (*p ||
 565                             ((ea_ver != 1) && (ea_ver != 2))) {
 566                                 fprintf(stderr,
 567                                         _("Invalid EA version.\n"));
 568                                 extended_usage++;
 569                                 continue;
 570                         }
 571                         ctx->ext_attr_ver = ea_ver;
 572                 } else if (strcmp(token, "fragcheck") == 0) {
 573                         ctx->options |= E2F_OPT_FRAGCHECK;
 574                         continue;
 575                 } else {
 576                         fprintf(stderr, _("Unknown extended option: %s\n"),
 577                                 token);
 578                         extended_usage++;
 579                 }
 580         }
 581         free(buf);
 582
 583         if (extended_usage) {
 584                 fputs(("\nExtended options are separated by commas, "
 585                        "and may take an argument which\n"
 586                        "is set off by an equals ('=') sign.  "
 587                        "Valid extended options are:\n"), stderr);
 588                 fputs(("\tea_ver=<ea_version (1 or 2)>\n"), stderr);
 589                 fputs(("\tfragcheck\n"), stderr);
 590                 fputc('\n', stderr);
 591                 exit(1);
 592         }
 593 }
 594
 595 static void syntax_err_report(const char *filename, long err, int line_num)
 596 {
 597         fprintf(stderr,
 598                 _("Syntax error in e2fsck config file (%s, line #%d)\n\t%s\n"),
 599                 filename, line_num, error_message(err));
 600         exit(FSCK_ERROR);
 601 }
 602
 603 static const char *config_fn[] = { ROOT_SYSCONFDIR "/e2fsck.conf", 0 };
 604
 605 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 606 {
 607         int             flush = 0;
 608         int             c, fd;
 609 #ifdef MTRACE
 610         extern void     *mallwatch;
 611 #endif
 612         e2fsck_t        ctx;
 613         errcode_t       retval;
 614 #ifdef HAVE_SIGNAL_H
 615         struct sigaction        sa;
 616 #endif
 617         char            *extended_opts = 0;
 618         char            *cp;
 619         int             res;            /* result of sscanf */
 620 #ifdef CONFIG_JBD_DEBUG
 621         char            *jbd_debug;
 622 #endif
 623
 624         retval = e2fsck_allocate_context(&ctx);
 625         if (retval)
 626                 return retval;
 627
 628         *ret_ctx = ctx;
 629
 630         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
 631         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
 632         if (isatty(0) && isatty(1)) {
 633                 ctx->interactive = 1;
 634         } else {
 635                 ctx->start_meta[0] = '\001';
 636                 ctx->stop_meta[0] = '\002';
 637         }
 638         memset(bar, '=', sizeof(bar)-1);
 639         memset(spaces, ' ', sizeof(spaces)-1);
 640         add_error_table(&et_ext2_error_table);
 641         add_error_table(&et_prof_error_table);
 642         blkid_get_cache(&ctx->blkid, NULL);
 643
 644         if (argc && *argv)
 645                 ctx->program_name = *argv;
 646         else
 647                 ctx->program_name = "e2fsck";
 648         while ((c = getopt (argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDk")) != EOF)
 649                 switch (c) {
 650                 case 'C':
 651                         ctx->progress = e2fsck_update_progress;
 652                         res = sscanf(optarg, "%d", &ctx->progress_fd);
 653                         if (res != 1)
 654                                 goto sscanf_err;
 655
 656                         if (ctx->progress_fd < 0) {
 657                                 ctx->progress = 0;
 658                                 ctx->progress_fd = ctx->progress_fd * -1;
 659                         }
 660                         if (!ctx->progress_fd)
 661                                 break;
 662                         /* Validate the file descriptor to avoid disasters */
 663                         fd = dup(ctx->progress_fd);
 664                         if (fd < 0) {
 665                                 fprintf(stderr,
 666                                 _("Error validating file descriptor %d: %s\n"),
 667                                         ctx->progress_fd,
 668                                         error_message(errno));
 669                                 fatal_error(ctx,
 670                         _("Invalid completion information file descriptor"));
 671                         } else
 672                                 close(fd);
 673                         break;
 674                 case 'D':
 675                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 676                         break;
 677                 case 'E':
 678                         extended_opts = optarg;
 679                         break;
 680                 case 'p':
 681                 case 'a':
 682                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
 683                         conflict_opt:
 684                                 fatal_error(ctx,
 685         _("Only one of the options -p/-a, -n or -y may be specified."));
 686                         }
 687                         ctx->options |= E2F_OPT_PREEN;
 688                         break;
 689                 case 'n':
 690                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
 691                                 goto conflict_opt;
 692                         ctx->options |= E2F_OPT_NO;
 693                         break;
 694                 case 'y':
 695                         if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
 696                                 goto conflict_opt;
 697                         ctx->options |= E2F_OPT_YES;
 698                         break;
 699                 case 't':
 700 #ifdef RESOURCE_TRACK
 701                         if (ctx->options & E2F_OPT_TIME)
 702                                 ctx->options |= E2F_OPT_TIME2;
 703                         else
 704                                 ctx->options |= E2F_OPT_TIME;
 705 #else
 706                         fprintf(stderr, _("The -t option is not "
 707                                 "supported on this version of e2fsck.\n"));
 708 #endif
 709                         break;
 710                 case 'c':
 711                         if (cflag++)
 712                                 ctx->options |= E2F_OPT_WRITECHECK;
 713                         ctx->options |= E2F_OPT_CHECKBLOCKS;
 714                         break;
 715                 case 'r':
 716                         /* What we do by default, anyway! */
 717                         break;
 718                 case 'b':
 719                         res = sscanf(optarg, "%u", &ctx->use_superblock);
 720                         if (res != 1)
 721                                 goto sscanf_err;
 722                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
 723                         break;
 724                 case 'B':
 725                         ctx->blocksize = atoi(optarg);
 726                         break;
 727                 case 'I':
 728                         res = sscanf(optarg, "%d", &ctx->inode_buffer_blocks);
 729                         if (res != 1)
 730                                 goto sscanf_err;
 731                         break;
 732                 case 'j':
 733                         ctx->journal_name = string_copy(ctx, optarg, 0);
 734                         break;
 735                 case 'P':
 736                         res = sscanf(optarg, "%d", &ctx->process_inode_size);
 737                         if (res != 1)
 738                                 goto sscanf_err;
 739                         break;
 740                 case 'L':
 741                         replace_bad_blocks++;
 742                 case 'l':
 743                         bad_blocks_file = string_copy(ctx, optarg, 0);
 744                         break;
 745                 case 'd':
 746                         ctx->options |= E2F_OPT_DEBUG;
 747                         break;
 748                 case 'f':
 749                         ctx->options |= E2F_OPT_FORCE;
 750                         break;
 751                 case 'F':
 752                         flush = 1;
 753                         break;
 754                 case 'v':
 755                         verbose = 1;
 756                         break;
 757                 case 'V':
 758                         show_version_only = 1;
 759                         break;
 760 #ifdef MTRACE
 761                 case 'M':
 762                         mallwatch = (void *) strtol(optarg, NULL, 0);
 763                         break;
 764 #endif
 765                 case 'N':
 766                         ctx->device_name = string_copy(ctx, optarg, 0);
 767                         break;
 768                 case 'k':
 769                         keep_bad_blocks++;
 770                         break;
 771                 default:
 772                         usage(ctx);
 773                 }
 774         if (show_version_only)
 775                 return 0;
 776         if (optind != argc - 1)
 777                 usage(ctx);
 778         if ((ctx->options & E2F_OPT_NO) && !bad_blocks_file &&
 779             !cflag && !(ctx->options & E2F_OPT_COMPRESS_DIRS))
 780                 ctx->options |= E2F_OPT_READONLY;
 781
 782         ctx->io_options = strchr(argv[optind], '?');
 783         if (ctx->io_options)
 784                 *ctx->io_options++ = 0;
 785         ctx->filesystem_name = blkid_get_devname(ctx->blkid, argv[optind], 0);
 786         if (!ctx->filesystem_name) {
 787                 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
 788                         argv[optind]);
 789                 fatal_error(ctx, 0);
 790         }
 791         ctx->filesystem_name = string_copy(ctx, ctx->filesystem_name, 0);
 792         if (extended_opts)
 793                 parse_extended_opts(ctx, extended_opts);
 794
 795         if ((cp = getenv("E2FSCK_CONFIG")) != NULL)
 796                 config_fn[0] = cp;
 797         profile_set_syntax_err_cb(syntax_err_report);
 798         profile_init(config_fn, &ctx->profile);
 799
 800         if (flush) {
 801                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
 802                 if (fd < 0) {
 803                         com_err("open", errno,
 804                                 _("while opening %s for flushing"),
 805                                 ctx->filesystem_name);
 806                         fatal_error(ctx, 0);
 807                 }
 808                 if ((retval = ext2fs_sync_device(fd, 1))) {
 809                         com_err("ext2fs_sync_device", retval,
 810                                 _("while trying to flush %s"),
 811                                 ctx->filesystem_name);
 812                         fatal_error(ctx, 0);
 813                 }
 814                 close(fd);
 815         }
 816         if (cflag && bad_blocks_file) {
 817                 fprintf(stderr, _("The -c and the -l/-L options may "
 818                                   "not be both used at the same time.\n"));
 819                 exit(FSCK_USAGE);
 820         }
 821 #ifdef HAVE_SIGNAL_H
 822         /*
 823          * Set up signal action
 824          */
 825         memset(&sa, 0, sizeof(struct sigaction));
 826         sa.sa_handler = signal_cancel;
 827         sigaction(SIGINT, &sa, 0);
 828         sigaction(SIGTERM, &sa, 0);
 829 #ifdef SA_RESTART
 830         sa.sa_flags = SA_RESTART;
 831 #endif
 832         e2fsck_global_ctx = ctx;
 833         sa.sa_handler = signal_progress_on;
 834         sigaction(SIGUSR1, &sa, 0);
 835         sa.sa_handler = signal_progress_off;
 836         sigaction(SIGUSR2, &sa, 0);
 837 #endif
 838
 839         /* Update our PATH to include /sbin if we need to run badblocks  */
 840         if (cflag) {
 841                 char *oldpath = getenv("PATH");
 842                 char *newpath;
 843                 int len = sizeof(PATH_SET) + 1;
 844
 845                 if (oldpath)
 846                         len += strlen(oldpath);
 847
 848                 newpath = malloc(len);
 849                 if (!newpath)
 850                         fatal_error(ctx, "Couldn't malloc() newpath");
 851                 strcpy(newpath, PATH_SET);
 852
 853                 if (oldpath) {
 854                         strcat(newpath, ":");
 855                         strcat(newpath, oldpath);
 856                 }
 857                 putenv(newpath);
 858         }
 859 #ifdef CONFIG_JBD_DEBUG
 860         jbd_debug = getenv("E2FSCK_JBD_DEBUG");
 861         if (jbd_debug) {
 862                 res = sscanf(jbd_debug, "%d", &journal_enable_debug);
 863                 if (res != 1) {
 864                         fprintf(stderr,
 865                                 _("E2FSCK_JBD_DEBUG \"%s\" not an integer\n\n"),
 866                                 jbd_debug);
 867                         exit (1);
 868                 }
 869         }
 870 #endif
 871         return 0;
 872
 873 sscanf_err:
 874         fprintf(stderr, _("\nInvalid non-numeric argument to -%c (\"%s\")\n\n"),
 875                 c, optarg);
 876         exit (1);
 877 }
 878
 879 static const char *my_ver_string = E2FSPROGS_VERSION;
 880 static const char *my_ver_date = E2FSPROGS_DATE;
 881
 882 int main (int argc, char *argv[])
 883 {
 884         errcode_t       retval = 0, orig_retval = 0;
 885         int             exit_value = FSCK_OK;
 886         ext2_filsys     fs = 0;
 887         io_manager      io_ptr;
 888         struct ext2_super_block *sb;
 889         const char      *lib_ver_date;
 890         int             my_ver, lib_ver;
 891         e2fsck_t        ctx;
 892         struct problem_context pctx;
 893         int flags, run_result;
 894         int journal_size;
 895         int sysval, sys_page_size = 4096;
 896         __u32 features[3];
 897         char *cp;
 898
 899         clear_problem_context(&pctx);
 900 #ifdef MTRACE
 901         mtrace();
 902 #endif
 903 #ifdef MCHECK
 904         mcheck(0);
 905 #endif
 906 #ifdef ENABLE_NLS
 907         setlocale(LC_MESSAGES, "");
 908         setlocale(LC_CTYPE, "");
 909         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 910         textdomain(NLS_CAT_NAME);
 911 #endif
 912         my_ver = ext2fs_parse_version_string(my_ver_string);
 913         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
 914         if (my_ver > lib_ver) {
 915                 fprintf( stderr, _("Error: ext2fs library version "
 916                         "out of date!\n"));
 917                 show_version_only++;
 918         }
 919
 920         retval = PRS(argc, argv, &ctx);
 921         if (retval) {
 922                 com_err("e2fsck", retval,
 923                         _("while trying to initialize program"));
 924                 exit(FSCK_ERROR);
 925         }
 926         reserve_stdio_fds();
 927
 928 #ifdef RESOURCE_TRACK
 929         init_resource_track(&ctx->global_rtrack, NULL);
 930 #endif
 931
 932         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
 933                 fprintf(stderr, "e2fsck %s (%s)\n", my_ver_string,
 934                          my_ver_date);
 935
 936         if (show_version_only) {
 937                 fprintf(stderr, _("\tUsing %s, %s\n"),
 938                         error_message(EXT2_ET_BASE), lib_ver_date);
 939                 exit(FSCK_OK);
 940         }
 941
 942         check_mount(ctx);
 943
 944         if (!(ctx->options & E2F_OPT_PREEN) &&
 945             !(ctx->options & E2F_OPT_NO) &&
 946             !(ctx->options & E2F_OPT_YES)) {
 947                 if (!ctx->interactive)
 948                         fatal_error(ctx,
 949                                     _("need terminal for interactive repairs"));
 950         }
 951         ctx->superblock = ctx->use_superblock;
 952 restart:
 953 #ifdef CONFIG_TESTIO_DEBUG
 954         io_ptr = test_io_manager;
 955         test_io_backing_manager = unix_io_manager;
 956 #else
 957         io_ptr = unix_io_manager;
 958 #endif
 959         flags = EXT2_FLAG_NOFREE_ON_ERROR;
 960         if ((ctx->options & E2F_OPT_READONLY) == 0)
 961                 flags |= EXT2_FLAG_RW;
 962         if ((ctx->mount_flags & EXT2_MF_MOUNTED) == 0)
 963                 flags |= EXT2_FLAG_EXCLUSIVE;
 964
 965         if (ctx->superblock && ctx->blocksize) {
 966                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
 967                                       flags, ctx->superblock, ctx->blocksize,
 968                                       io_ptr, &fs);
 969         } else if (ctx->superblock) {
 970                 int blocksize;
 971                 for (blocksize = EXT2_MIN_BLOCK_SIZE;
 972                      blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
 973                         retval = ext2fs_open2(ctx->filesystem_name,
 974                                               ctx->io_options, flags,
 975                                               ctx->superblock, blocksize,
 976                                               io_ptr, &fs);
 977                         if (!retval)
 978                                 break;
 979                 }
 980         } else
 981                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
 982                                       flags, 0, 0, io_ptr, &fs);
 983         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
 984             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
 985             ((retval == EXT2_ET_BAD_MAGIC) ||
 986              (retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
 987              ((retval == 0) && ext2fs_check_desc(fs)))) {
 988                 if (fs->flags & EXT2_FLAG_NOFREE_ON_ERROR) {
 989                         ext2fs_free(fs);
 990                         fs = NULL;
 991                 }
 992                 if (!fs || (fs->group_desc_count > 1)) {
 993                         printf(_("%s: %s trying backup blocks...\n"),
 994                                ctx->program_name,
 995                                retval ? _("Superblock invalid,") :
 996                                _("Group descriptors look bad..."));
 997                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
 998                         if (fs)
 999                                 ext2fs_close(fs);
1000                         orig_retval = retval;
1001                         goto restart;
1002                 }
1003         }
1004         if (((retval == EXT2_ET_UNSUPP_FEATURE) ||
1005              (retval == EXT2_ET_RO_UNSUPP_FEATURE)) &&
1006             fs && fs->super) {
1007                 sb = fs->super;
1008                 features[0] = (sb->s_feature_compat &
1009                                ~EXT2_LIB_FEATURE_COMPAT_SUPP);
1010                 features[1] = (sb->s_feature_incompat &
1011                                ~EXT2_LIB_FEATURE_INCOMPAT_SUPP);
1012                 features[2] = (sb->s_feature_ro_compat &
1013                                ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1014                 if (features[0] || features[1] || features[2])
1015                         goto print_unsupp_features;
1016         }
1017         if (retval) {
1018                 if (orig_retval)
1019                         retval = orig_retval;
1020                 com_err(ctx->program_name, retval, _("while trying to open %s"),
1021                         ctx->filesystem_name);
1022                 if (retval == EXT2_ET_REV_TOO_HIGH) {
1023                         printf(_("The filesystem revision is apparently "
1024                                "too high for this version of e2fsck.\n"
1025                                "(Or the filesystem superblock "
1026                                "is corrupt)\n\n"));
1027                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1028                 } else if (retval == EXT2_ET_SHORT_READ)
1029                         printf(_("Could this be a zero-length partition?\n"));
1030                 else if ((retval == EPERM) || (retval == EACCES))
1031                         printf(_("You must have %s access to the "
1032                                "filesystem or be root\n"),
1033                                (ctx->options & E2F_OPT_READONLY) ?
1034                                "r/o" : "r/w");
1035                 else if (retval == ENXIO)
1036                         printf(_("Possibly non-existent or swap device?\n"));
1037                 else if (retval == EBUSY)
1038                         printf(_("Filesystem mounted or opened exclusively "
1039                                  "by another program?\n"));
1040 #ifdef EROFS
1041                 else if (retval == EROFS)
1042                         printf(_("Disk write-protected; use the -n option "
1043                                "to do a read-only\n"
1044                                "check of the device.\n"));
1045 #endif
1046                 else
1047                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
1048                 fatal_error(ctx, 0);
1049         }
1050         /*
1051          * We only update the master superblock because (a) paranoia;
1052          * we don't want to corrupt the backup superblocks, and (b) we
1053          * don't need to update the mount count and last checked
1054          * fields in the backup superblock (the kernel doesn't update
1055          * the backup superblocks anyway).  With newer versions of the
1056          * library this flag is set by ext2fs_open2(), but we set this
1057          * here just to be sure.  (No, we don't support e2fsck running
1058          * with some other libext2fs than the one that it was shipped
1059          * with, but just in case....)
1060          */
1061         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
1062
1063         if (!(ctx->flags & E2F_FLAG_GOT_DEVSIZE)) {
1064                 __u32 blocksize = EXT2_BLOCK_SIZE(fs->super);
1065                 int need_restart = 0;
1066
1067                 pctx.errcode = ext2fs_get_device_size(ctx->filesystem_name,
1068                                                       blocksize,
1069                                                       &ctx->num_blocks);
1070                 /*
1071                  * The floppy driver refuses to allow anyone else to
1072                  * open the device if has been opened with O_EXCL;
1073                  * this is unlike other block device drivers in Linux.
1074                  * To handle this, we close the filesystem and then
1075                  * reopen the filesystem after we get the device size.
1076                  */
1077                 if (pctx.errcode == EBUSY) {
1078                         ext2fs_close(fs);
1079                         need_restart++;
1080                         pctx.errcode =
1081                                 ext2fs_get_device_size(ctx->filesystem_name,
1082                                                        blocksize,
1083                                                        &ctx->num_blocks);
1084                 }
1085                 if (pctx.errcode == EXT2_ET_UNIMPLEMENTED)
1086                         ctx->num_blocks = 0;
1087                 else if (pctx.errcode) {
1088                         fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
1089                         ctx->flags |= E2F_FLAG_ABORT;
1090                         fatal_error(ctx, 0);
1091                 }
1092                 ctx->flags |= E2F_FLAG_GOT_DEVSIZE;
1093                 if (need_restart)
1094                         goto restart;
1095         }
1096
1097         ctx->fs = fs;
1098         fs->priv_data = ctx;
1099         fs->now = ctx->now;
1100         sb = fs->super;
1101         if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
1102                 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
1103                         _("while trying to open %s"),
1104                         ctx->filesystem_name);
1105         get_newer:
1106                 fatal_error(ctx, _("Get a newer version of e2fsck!"));
1107         }
1108
1109         /*
1110          * Set the device name, which is used whenever we print error
1111          * or informational messages to the user.
1112          */
1113         if (ctx->device_name == 0 &&
1114             (sb->s_volume_name[0] != 0)) {
1115                 ctx->device_name = string_copy(ctx, sb->s_volume_name,
1116                                                sizeof(sb->s_volume_name));
1117         }
1118         if (ctx->device_name == 0)
1119                 ctx->device_name = string_copy(ctx, ctx->filesystem_name, 0);
1120         for (cp = ctx->device_name; *cp; cp++)
1121                 if (isspace(*cp) || *cp == ':')
1122                         *cp = '_';
1123
1124         /*
1125          * Make sure the ext3 superblock fields are consistent.
1126          */
1127         retval = e2fsck_check_ext3_journal(ctx);
1128         if (retval) {
1129                 com_err(ctx->program_name, retval,
1130                         _("while checking ext3 journal for %s"),
1131                         ctx->device_name);
1132                 fatal_error(ctx, 0);
1133         }
1134
1135         /*
1136          * Check to see if we need to do ext3-style recovery.  If so,
1137          * do it, and then restart the fsck.
1138          */
1139         if (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) {
1140                 if (ctx->options & E2F_OPT_READONLY) {
1141                         printf(_("Warning: skipping journal recovery "
1142                                  "because doing a read-only filesystem "
1143                                  "check.\n"));
1144                         io_channel_flush(ctx->fs->io);
1145                 } else {
1146                         if (ctx->flags & E2F_FLAG_RESTARTED) {
1147                                 /*
1148                                  * Whoops, we attempted to run the
1149                                  * journal twice.  This should never
1150                                  * happen, unless the hardware or
1151                                  * device driver is being bogus.
1152                                  */
1153                                 com_err(ctx->program_name, 0,
1154                                         _("unable to set superblock flags on %s\n"), ctx->device_name);
1155                                 fatal_error(ctx, 0);
1156                         }
1157                         retval = e2fsck_run_ext3_journal(ctx);
1158                         if (retval) {
1159                                 com_err(ctx->program_name, retval,
1160                                 _("while recovering ext3 journal of %s"),
1161                                         ctx->device_name);
1162                                 fatal_error(ctx, 0);
1163                         }
1164                         ext2fs_close(ctx->fs);
1165                         ctx->fs = 0;
1166                         ctx->flags |= E2F_FLAG_RESTARTED;
1167                         goto restart;
1168                 }
1169         }
1170
1171         /*
1172          * Check for compatibility with the feature sets.  We need to
1173          * be more stringent than ext2fs_open().
1174          */
1175         features[0] = sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP;
1176         features[1] = sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP;
1177         features[2] = (sb->s_feature_ro_compat &
1178                        ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
1179 print_unsupp_features:
1180         if (features[0] || features[1] || features[2]) {
1181                 int     i, j;
1182                 __u32   *mask = features, m;
1183
1184                 fprintf(stderr, _("%s has unsupported feature(s):"),
1185                         ctx->filesystem_name);
1186
1187                 for (i=0; i <3; i++,mask++) {
1188                         for (j=0,m=1; j < 32; j++, m<<=1) {
1189                                 if (*mask & m)
1190                                         fprintf(stderr, " %s",
1191                                                 e2p_feature2string(i, m));
1192                         }
1193                 }
1194                 putc('\n', stderr);
1195                 goto get_newer;
1196         }
1197 #ifdef ENABLE_COMPRESSION
1198         if (sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_COMPRESSION)
1199                 com_err(ctx->program_name, 0,
1200                         _("Warning: compression support is experimental.\n"));
1201 #endif
1202 #ifndef ENABLE_HTREE
1203         if (sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) {
1204                 com_err(ctx->program_name, 0,
1205                         _("E2fsck not compiled with HTREE support,\n\t"
1206                           "but filesystem %s has HTREE directories.\n"),
1207                         ctx->device_name);
1208                 goto get_newer;
1209         }
1210 #endif
1211
1212         /*
1213          * If the user specified a specific superblock, presumably the
1214          * master superblock has been trashed.  So we mark the
1215          * superblock as dirty, so it can be written out.
1216          */
1217         if (ctx->superblock &&
1218             !(ctx->options & E2F_OPT_READONLY))
1219                 ext2fs_mark_super_dirty(fs);
1220
1221         /*
1222          * Calculate the number of filesystem blocks per pagesize.  If
1223          * fs->blocksize > page_size, set the number of blocks per
1224          * pagesize to 1 to avoid division by zero errors.
1225          */
1226 #ifdef _SC_PAGESIZE
1227         sysval = sysconf(_SC_PAGESIZE);
1228         if (sysval > 0)
1229                 sys_page_size = sysval;
1230 #endif /* _SC_PAGESIZE */
1231         ctx->blocks_per_page = sys_page_size / fs->blocksize;
1232         if (ctx->blocks_per_page == 0)
1233                 ctx->blocks_per_page = 1;
1234
1235         ehandler_init(fs->io);
1236
1237         if (ctx->superblock)
1238                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
1239         ext2fs_mark_valid(fs);
1240         check_super_block(ctx);
1241         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1242                 fatal_error(ctx, 0);
1243         check_if_skip(ctx);
1244         if (bad_blocks_file)
1245                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
1246         else if (cflag)
1247                 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
1248         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1249                 fatal_error(ctx, 0);
1250
1251         /*
1252          * Mark the system as valid, 'til proven otherwise
1253          */
1254         ext2fs_mark_valid(fs);
1255
1256         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
1257         if (retval) {
1258                 com_err(ctx->program_name, retval,
1259                         _("while reading bad blocks inode"));
1260                 preenhalt(ctx);
1261                 printf(_("This doesn't bode well,"
1262                          " but we'll try to go on...\n"));
1263         }
1264
1265         /*
1266          * Save the journal size in megabytes.
1267          * Try and use the journal size from the backup else let e2fsck
1268          * find the default journal size.
1269          */
1270         if (sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS)
1271                 journal_size = sb->s_jnl_blocks[16] >> 20;
1272         else
1273                 journal_size = -1;
1274
1275         run_result = e2fsck_run(ctx);
1276         e2fsck_clear_progbar(ctx);
1277
1278         if (ctx->flags & E2F_FLAG_JOURNAL_INODE) {
1279                 if (fix_problem(ctx, PR_6_RECREATE_JOURNAL, &pctx)) {
1280                         if (journal_size < 1024)
1281                                 journal_size = ext2fs_default_journal_size(fs->super->s_blocks_count);
1282                         if (journal_size < 0) {
1283                                 fs->super->s_feature_compat &=
1284                                         ~EXT3_FEATURE_COMPAT_HAS_JOURNAL;
1285                                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1286                                 com_err(ctx->program_name, 0,
1287                                         _("Couldn't determine journal size"));
1288                                 goto no_journal;
1289                         }
1290                         printf(_("Creating journal (%d blocks): "),
1291                                journal_size);
1292                         fflush(stdout);
1293                         retval = ext2fs_add_journal_inode(fs,
1294                                                           journal_size, 0);
1295                         if (retval) {
1296                                 com_err("Error ", retval,
1297                                         _("\n\twhile trying to create journal"));
1298                                 goto no_journal;
1299                         }
1300                         printf(_(" Done.\n"));
1301                         printf(_("\n*** journal has been re-created - "
1302                                        "filesystem is now ext3 again ***\n"));
1303                 }
1304         }
1305 no_journal:
1306
1307         if (run_result == E2F_FLAG_RESTART) {
1308                 printf(_("Restarting e2fsck from the beginning...\n"));
1309                 retval = e2fsck_reset_context(ctx);
1310                 if (retval) {
1311                         com_err(ctx->program_name, retval,
1312                                 _("while resetting context"));
1313                         fatal_error(ctx, 0);
1314                 }
1315                 ext2fs_close(fs);
1316                 goto restart;
1317         }
1318         if (run_result & E2F_FLAG_CANCEL) {
1319                 printf(_("%s: e2fsck canceled.\n"), ctx->device_name ?
1320                        ctx->device_name : ctx->filesystem_name);
1321                 exit_value |= FSCK_CANCELED;
1322         }
1323         if (run_result & E2F_FLAG_ABORT)
1324                 fatal_error(ctx, _("aborted"));
1325         if (check_backup_super_block(ctx)) {
1326                 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
1327                 ext2fs_mark_super_dirty(fs);
1328         }
1329
1330 #ifdef MTRACE
1331         mtrace_print("Cleanup");
1332 #endif
1333         if (ext2fs_test_changed(fs)) {
1334                 exit_value |= FSCK_NONDESTRUCT;
1335                 if (!(ctx->options & E2F_OPT_PREEN))
1336                     printf(_("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
1337                                ctx->device_name);
1338                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
1339                         printf(_("%s: ***** REBOOT LINUX *****\n"),
1340                                ctx->device_name);
1341                         exit_value |= FSCK_REBOOT;
1342                 }
1343         }
1344         if (!ext2fs_test_valid(fs) ||
1345             ((exit_value & FSCK_CANCELED) &&
1346              (sb->s_state & EXT2_ERROR_FS))) {
1347                 printf(_("\n%s: ********** WARNING: Filesystem still has "
1348                          "errors **********\n\n"), ctx->device_name);
1349                 exit_value |= FSCK_UNCORRECTED;
1350                 exit_value &= ~FSCK_NONDESTRUCT;
1351         }
1352         if (exit_value & FSCK_CANCELED) {
1353                 int     allow_cancellation;
1354
1355                 profile_get_boolean(ctx->profile, "options",
1356                                     "allow_cancellation", 0, 0,
1357                                     &allow_cancellation);
1358                 exit_value &= ~FSCK_NONDESTRUCT;
1359                 if (allow_cancellation && ext2fs_test_valid(fs) &&
1360                     (sb->s_state & EXT2_VALID_FS) &&
1361                     !(sb->s_state & EXT2_ERROR_FS))
1362                         exit_value = 0;
1363         } else {
1364                 show_stats(ctx);
1365                 if (!(ctx->options & E2F_OPT_READONLY)) {
1366                         if (ext2fs_test_valid(fs)) {
1367                                 if (!(sb->s_state & EXT2_VALID_FS))
1368                                         exit_value |= FSCK_NONDESTRUCT;
1369                                 sb->s_state = EXT2_VALID_FS;
1370                         } else
1371                                 sb->s_state &= ~EXT2_VALID_FS;
1372                         sb->s_mnt_count = 0;
1373                         sb->s_lastcheck = ctx->now;
1374                         ext2fs_mark_super_dirty(fs);
1375                 }
1376         }
1377
1378         if (sb->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM &&
1379             !(ctx->options & E2F_OPT_READONLY)) {
1380                 retval = ext2fs_set_gdt_csum(ctx->fs);
1381                 if (retval) {
1382                         com_err(ctx->program_name, retval,
1383                                 _("while setting block group checksum info"));
1384                         fatal_error(ctx, 0);
1385                 }
1386         }
1387
1388         e2fsck_write_bitmaps(ctx);
1389 #ifdef RESOURCE_TRACK
1390         io_channel_flush(ctx->fs->io);
1391         if (ctx->options & E2F_OPT_TIME)
1392                 print_resource_track(NULL, &ctx->global_rtrack, ctx->fs->io);
1393 #endif
1394         ext2fs_close(fs);
1395         ctx->fs = NULL;
1396         free(ctx->journal_name);
1397
1398         e2fsck_free_context(ctx);
1399         remove_error_table(&et_ext2_error_table);
1400         remove_error_table(&et_prof_error_table);
1401         return exit_value;
1402 }