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 #include <stdio.h>
  13 #ifdef HAVE_STDLIB_H
  14 #include <stdlib.h>
  15 #endif
  16 #include <string.h>
  17 #include <fcntl.h>
  18 #include <ctype.h>
  19 #include <time.h>
  20 #ifdef HAVE_SIGNAL_H
  21 #include <signal.h>
  22 #endif
  23 #ifdef HAVE_GETOPT_H
  24 #include <getopt.h>
  25 #else
  26 extern char *optarg;
  27 extern int optind;
  28 #endif
  29 #include <unistd.h>
  30 #ifdef HAVE_ERRNO_H
  31 #include <errno.h>
  32 #endif
  33 #ifdef HAVE_MNTENT_H
  34 #include <mntent.h>
  35 #endif
  36 #ifdef HAVE_SYS_IOCTL_H
  37 #include <sys/ioctl.h>
  38 #endif
  39 #ifdef HAVE_MALLOC_H
  40 #include <malloc.h>
  41 #endif
  42 #ifdef HAVE_SYS_TYPES_H
  43 #include <sys/types.h>
  44 #endif
  45 #ifdef HAVE_DIRENT_H
  46 #include <dirent.h>
  47 #endif
  48
  49 #include "et/com_err.h"
  50 #include "e2fsck.h"
  51 #include "problem.h"
  52 #include "../version.h"
  53
  54 /* Command line options */
  55 static int swapfs;
  56 static int normalize_swapfs;
  57 static int cflag;               /* check disk */
  58 static int show_version_only;
  59 static int verbose;
  60
  61 static int replace_bad_blocks;
  62 static int keep_bad_blocks;
  63 static char *bad_blocks_file;
  64
  65 e2fsck_t e2fsck_global_ctx;     /* Try your very best not to use this! */
  66
  67 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jfs-debug */
  68 int journal_enable_debug = -1;
  69 #endif
  70
  71 static void usage(e2fsck_t ctx)
  72 {
  73         fprintf(stderr,
  74                 _("Usage: %s [-panyrcdfvstDFSV] [-b superblock] [-B blocksize]\n"
  75                 "\t\t[-I inode_buffer_blocks] [-P process_inode_size]\n"
  76                 "\t\t[-l|-L bad_blocks_file] [-C fd] [-j ext-journal]\n"
  77                 "\t\t[-E extended-options] device\n"),
  78                 ctx->program_name);
  79
  80         fprintf(stderr, _("\nEmergency help:\n"
  81                 " -p                   Automatic repair (no questions)\n"
  82                 " -n                   Make no changes to the filesystem\n"
  83                 " -y                   Assume \"yes\" to all questions\n"
  84                 " -c                   Check for bad blocks and add them to the badblock list\n"
  85                 " -f                   Force checking even if filesystem is marked clean\n"));
  86         fprintf(stderr, _(""
  87                 " -v                   Be verbose\n"
  88                 " -b superblock        Use alternative superblock\n"
  89                 " -B blocksize         Force blocksize when looking for superblock\n"
  90                 " -j external-journal  Set location of the external journal\n"
  91                 " -l bad_blocks_file   Add to badblocks list\n"
  92                 " -L bad_blocks_file   Set badblocks list\n"
  93                 ));
  94
  95         exit(FSCK_USAGE);
  96 }
  97
  98 static void show_stats(e2fsck_t ctx)
  99 {
 100         ext2_filsys fs = ctx->fs;
 101         int inodes, inodes_used, blocks, blocks_used;
 102         int dir_links;
 103         int num_files, num_links;
 104         int frag_percent;
 105
 106         dir_links = 2 * ctx->fs_directory_count - 1;
 107         num_files = ctx->fs_total_count - dir_links;
 108         num_links = ctx->fs_links_count - dir_links;
 109         inodes = fs->super->s_inodes_count;
 110         inodes_used = (fs->super->s_inodes_count -
 111                        fs->super->s_free_inodes_count);
 112         blocks = fs->super->s_blocks_count;
 113         blocks_used = (fs->super->s_blocks_count -
 114                        fs->super->s_free_blocks_count);
 115
 116         frag_percent = (10000 * ctx->fs_fragmented) / inodes_used;
 117         frag_percent = (frag_percent + 5) / 10;
 118
 119         if (!verbose) {
 120                 printf(_("%s: %d/%d files (%0d.%d%% non-contiguous), %d/%d blocks\n"),
 121                        ctx->device_name, inodes_used, inodes,
 122                        frag_percent / 10, frag_percent % 10,
 123                        blocks_used, blocks);
 124                 return;
 125         }
 126         printf (P_("\n%8d inode used (%d%%)\n", "\n%8d inodes used (%d%%)\n",
 127                    inodes_used), inodes_used, 100 * inodes_used / inodes);
 128         printf (P_("%8d non-contiguous inode (%0d.%d%%)\n",
 129                    "%8d non-contiguous inodes (%0d.%d%%)\n",
 130                    ctx->fs_fragmented),
 131                 ctx->fs_fragmented, frag_percent / 10, frag_percent % 10);
 132         printf (_("         # of inodes with ind/dind/tind blocks: %d/%d/%d\n"),
 133                 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
 134         printf (P_("%8d block used (%d%%)\n", "%8d blocks used (%d%%)\n",
 135                    blocks_used),
 136                 blocks_used, (int) ((long long) 100 * blocks_used / blocks));
 137         printf (P_("%8d bad block\n", "%8d bad blocks\n",
 138                    ctx->fs_badblocks_count), ctx->fs_badblocks_count);
 139         printf (P_("%8d large file\n", "%8d large files\n",
 140                    ctx->large_files), ctx->large_files);
 141         printf (P_("\n%8d regular file\n", "\n%8d regular files\n",
 142                    ctx->fs_regular_count), ctx->fs_regular_count);
 143         printf (P_("%8d directory\n", "%8d directories\n",
 144                    ctx->fs_directory_count), ctx->fs_directory_count);
 145         printf (P_("%8d character device file\n",
 146                    "%8d character device files\n", ctx->fs_chardev_count),
 147                 ctx->fs_chardev_count);
 148         printf (P_("%8d block device file\n", "%8d block device files\n",
 149                    ctx->fs_blockdev_count), ctx->fs_blockdev_count);
 150         printf (P_("%8d fifo\n", "%8d fifos\n", ctx->fs_fifo_count),
 151                 ctx->fs_fifo_count);
 152         printf (P_("%8d link\n", "%8d links\n",
 153                    ctx->fs_links_count - dir_links),
 154                 ctx->fs_links_count - dir_links);
 155         printf (P_("%8d symbolic link", "%8d symbolic links",
 156                    ctx->fs_symlinks_count), ctx->fs_symlinks_count);
 157         printf (P_(" (%d fast symbolic link)\n", " (%d fast symbolic links)\n",
 158                    ctx->fs_fast_symlinks_count), ctx->fs_fast_symlinks_count);
 159         printf (P_("%8d socket\n", "%8d sockets\n", ctx->fs_sockets_count),
 160                 ctx->fs_sockets_count);
 161         printf ("--------\n");
 162         printf (P_("%8d file\n", "%8d files\n",
 163                    ctx->fs_total_count - dir_links),
 164                 ctx->fs_total_count - dir_links);
 165 }
 166
 167 static void check_mount(e2fsck_t ctx)
 168 {
 169         errcode_t       retval;
 170         int             cont;
 171
 172         retval = ext2fs_check_if_mounted(ctx->filesystem_name,
 173                                          &ctx->mount_flags);
 174         if (retval) {
 175                 com_err("ext2fs_check_if_mount", retval,
 176                         _("while determining whether %s is mounted."),
 177                         ctx->filesystem_name);
 178                 return;
 179         }
 180
 181         /*
 182          * If the filesystem isn't mounted, or it's the root filesystem
 183          * and it's mounted read-only, then everything's fine.
 184          */
 185         if ((!(ctx->mount_flags & EXT2_MF_MOUNTED)) ||
 186             ((ctx->mount_flags & EXT2_MF_ISROOT) &&
 187              (ctx->mount_flags & EXT2_MF_READONLY)))
 188                 return;
 189
 190         if (ctx->options & E2F_OPT_READONLY) {
 191                 printf(_("Warning!  %s is mounted.\n"), ctx->filesystem_name);
 192                 return;
 193         }
 194
 195         printf(_("%s is mounted.  "), ctx->filesystem_name);
 196         if (!ctx->interactive)
 197                 fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
 198         printf(_("\n\n\007\007\007\007WARNING!!!  "
 199                "Running e2fsck on a mounted filesystem may cause\n"
 200                "SEVERE filesystem damage.\007\007\007\n\n"));
 201         cont = ask_yn(_("Do you really want to continue"), -1);
 202         if (!cont) {
 203                 printf (_("check aborted.\n"));
 204                 exit (0);
 205         }
 206         return;
 207 }
 208
 209 static int is_on_batt(void)
 210 {
 211         FILE    *f;
 212         DIR     *d;
 213         char    tmp[80], tmp2[80], fname[80];
 214         unsigned int    acflag;
 215         struct dirent*  de;
 216
 217         f = fopen("/proc/apm", "r");
 218         if (f) {
 219                 if (fscanf(f, "%s %s %s %x", tmp, tmp, tmp, &acflag) != 4)
 220                         acflag = 1;
 221                 fclose(f);
 222                 return (acflag != 1);
 223         }
 224         d = opendir("/proc/acpi/ac_adapter");
 225         if (d) {
 226                 while ((de=readdir(d)) != NULL) {
 227                         if (!strncmp(".", de->d_name, 1))
 228                                 continue;
 229                         snprintf(fname, 80, "/proc/acpi/ac_adapter/%s/state",
 230                                  de->d_name);
 231                         f = fopen(fname, "r");
 232                         if (!f)
 233                                 continue;
 234                         if (fscanf(f, "%s %s", tmp2, tmp) != 2)
 235                                 tmp[0] = 0;
 236                         fclose(f);
 237                         if (strncmp(tmp, "off-line", 8) == 0) {
 238                                 closedir(d);
 239                                 return 1;
 240                         }
 241                 }
 242                 closedir(d);
 243         }
 244         return 0;
 245 }
 246
 247 /*
 248  * This routine checks to see if a filesystem can be skipped; if so,
 249  * it will exit with E2FSCK_OK.  Under some conditions it will print a
 250  * message explaining why a check is being forced.
 251  */
 252 static void check_if_skip(e2fsck_t ctx)
 253 {
 254         ext2_filsys fs = ctx->fs;
 255         const char *reason = NULL;
 256         unsigned int reason_arg = 0;
 257         long next_check;
 258         int batt = is_on_batt();
 259         time_t now = time(0);
 260
 261         if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file ||
 262             cflag || swapfs)
 263                 return;
 264
 265         if ((fs->super->s_state & EXT2_ERROR_FS) ||
 266             !ext2fs_test_valid(fs))
 267                 reason = _(" contains a file system with errors");
 268         else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
 269                 reason = _(" was not cleanly unmounted");
 270         else if ((fs->super->s_max_mnt_count > 0) &&
 271                  (fs->super->s_mnt_count >=
 272                   (unsigned) fs->super->s_max_mnt_count)) {
 273                 reason = _(" has been mounted %u times without being checked");
 274                 reason_arg = fs->super->s_mnt_count;
 275                 if (batt && (fs->super->s_mnt_count <
 276                              (unsigned) fs->super->s_max_mnt_count*2))
 277                         reason = 0;
 278         } else if (fs->super->s_checkinterval &&
 279                    ((now - fs->super->s_lastcheck) >=
 280                     fs->super->s_checkinterval)) {
 281                 reason = _(" has gone %u days without being checked");
 282                 reason_arg = (now - fs->super->s_lastcheck)/(3600*24);
 283                 if (batt && ((now - fs->super->s_lastcheck) <
 284                              fs->super->s_checkinterval*2))
 285                         reason = 0;
 286         }
 287         if (reason) {
 288                 fputs(ctx->device_name, stdout);
 289                 printf(reason, reason_arg);
 290                 fputs(_(", check forced.\n"), stdout);
 291                 return;
 292         }
 293         printf(_("%s: clean, %d/%d files, %d/%d blocks"), ctx->device_name,
 294                fs->super->s_inodes_count - fs->super->s_free_inodes_count,
 295                fs->super->s_inodes_count,
 296                fs->super->s_blocks_count - fs->super->s_free_blocks_count,
 297                fs->super->s_blocks_count);
 298         next_check = 100000;
 299         if (fs->super->s_max_mnt_count > 0) {
 300                 next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count;
 301                 if (next_check <= 0)
 302                         next_check = 1;
 303         }
 304         if (fs->super->s_checkinterval &&
 305             ((now - fs->super->s_lastcheck) >= fs->super->s_checkinterval))
 306                 next_check = 1;
 307         if (next_check <= 5) {
 308                 if (next_check == 1)
 309                         fputs(_(" (check after next mount)"), stdout);
 310                 else
 311                         printf(_(" (check in %ld mounts)"), next_check);
 312         }
 313         fputc('\n', stdout);
 314         ext2fs_close(fs);
 315         ctx->fs = NULL;
 316         e2fsck_free_context(ctx);
 317         exit(FSCK_OK);
 318 }
 319
 320 /*
 321  * For completion notice
 322  */
 323 struct percent_tbl {
 324         int     max_pass;
 325         int     table[32];
 326 };
 327 struct percent_tbl e2fsck_tbl = {
 328         5, { 0, 70, 90, 92,  95, 100 }
 329 };
 330 static char bar[128], spaces[128];
 331
 332 static float calc_percent(struct percent_tbl *tbl, int pass, int curr,
 333                           int max)
 334 {
 335         float   percent;
 336
 337         if (pass <= 0)
 338                 return 0.0;
 339         if (pass > tbl->max_pass || max == 0)
 340                 return 100.0;
 341         percent = ((float) curr) / ((float) max);
 342         return ((percent * (tbl->table[pass] - tbl->table[pass-1]))
 343                 + tbl->table[pass-1]);
 344 }
 345
 346 extern void e2fsck_clear_progbar(e2fsck_t ctx)
 347 {
 348         if (!(ctx->flags & E2F_FLAG_PROG_BAR))
 349                 return;
 350
 351         printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80),
 352                ctx->stop_meta);
 353         fflush(stdout);
 354         ctx->flags &= ~E2F_FLAG_PROG_BAR;
 355 }
 356
 357 int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent,
 358                            unsigned int dpynum)
 359 {
 360         static const char spinner[] = "\\|/-";
 361         int     i;
 362         unsigned int    tick;
 363         struct timeval  tv;
 364         int dpywidth;
 365         int fixed_percent;
 366
 367         if (ctx->flags & E2F_FLAG_PROG_SUPPRESS)
 368                 return 0;
 369
 370         /*
 371          * Calculate the new progress position.  If the
 372          * percentage hasn't changed, then we skip out right
 373          * away.
 374          */
 375         fixed_percent = (int) ((10 * percent) + 0.5);
 376         if (ctx->progress_last_percent == fixed_percent)
 377                 return 0;
 378         ctx->progress_last_percent = fixed_percent;
 379
 380         /*
 381          * If we've already updated the spinner once within
 382          * the last 1/8th of a second, no point doing it
 383          * again.
 384          */
 385         gettimeofday(&tv, NULL);
 386         tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8));
 387         if ((tick == ctx->progress_last_time) &&
 388             (fixed_percent != 0) && (fixed_percent != 1000))
 389                 return 0;
 390         ctx->progress_last_time = tick;
 391
 392         /*
 393          * Advance the spinner, and note that the progress bar
 394          * will be on the screen
 395          */
 396         ctx->progress_pos = (ctx->progress_pos+1) & 3;
 397         ctx->flags |= E2F_FLAG_PROG_BAR;
 398
 399         dpywidth = 66 - strlen(label);
 400         dpywidth = 8 * (dpywidth / 8);
 401         if (dpynum)
 402                 dpywidth -= 8;
 403
 404         i = ((percent * dpywidth) + 50) / 100;
 405         printf("%s%s: |%s%s", ctx->start_meta, label,
 406                bar + (sizeof(bar) - (i+1)),
 407                spaces + (sizeof(spaces) - (dpywidth - i + 1)));
 408         if (fixed_percent == 1000)
 409                 fputc('|', stdout);
 410         else
 411                 fputc(spinner[ctx->progress_pos & 3], stdout);
 412         printf(" %4.1f%%  ", percent);
 413         if (dpynum)
 414                 printf("%u\r", dpynum);
 415         else
 416                 fputs(" \r", stdout);
 417         fputs(ctx->stop_meta, stdout);
 418
 419         if (fixed_percent == 1000)
 420                 e2fsck_clear_progbar(ctx);
 421         fflush(stdout);
 422
 423         return 0;
 424 }
 425
 426 static int e2fsck_update_progress(e2fsck_t ctx, int pass,
 427                                   unsigned long cur, unsigned long max)
 428 {
 429         char buf[80];
 430         float percent;
 431
 432         if (pass == 0)
 433                 return 0;
 434
 435         if (ctx->progress_fd) {
 436                 sprintf(buf, "%d %lu %lu\n", pass, cur, max);
 437                 write(ctx->progress_fd, buf, strlen(buf));
 438         } else {
 439                 percent = calc_percent(&e2fsck_tbl, pass, cur, max);
 440                 e2fsck_simple_progress(ctx, ctx->device_name,
 441                                        percent, 0);
 442         }
 443         return 0;
 444 }
 445
 446 #define PATH_SET "PATH=/sbin"
 447
 448 static void reserve_stdio_fds(void)
 449 {
 450         int     fd;
 451
 452         while (1) {
 453                 fd = open("/dev/null", O_RDWR);
 454                 if (fd > 2)
 455                         break;
 456                 if (fd < 0) {
 457                         fprintf(stderr, _("ERROR: Couldn't open "
 458                                 "/dev/null (%s)\n"),
 459                                 strerror(errno));
 460                         break;
 461                 }
 462         }
 463         close(fd);
 464 }
 465
 466 #ifdef HAVE_SIGNAL_H
 467 static void signal_progress_on(int sig EXT2FS_ATTR((unused)))
 468 {
 469         e2fsck_t ctx = e2fsck_global_ctx;
 470
 471         if (!ctx)
 472                 return;
 473
 474         ctx->progress = e2fsck_update_progress;
 475         ctx->progress_fd = 0;
 476 }
 477
 478 static void signal_progress_off(int sig EXT2FS_ATTR((unused)))
 479 {
 480         e2fsck_t ctx = e2fsck_global_ctx;
 481
 482         if (!ctx)
 483                 return;
 484
 485         e2fsck_clear_progbar(ctx);
 486         ctx->progress = 0;
 487 }
 488
 489 static void signal_cancel(int sig EXT2FS_ATTR((unused)))
 490 {
 491         e2fsck_t ctx = e2fsck_global_ctx;
 492
 493         if (!ctx)
 494                 exit(FSCK_CANCELED);
 495
 496         ctx->flags |= E2F_FLAG_CANCEL;
 497 }
 498 #endif
 499
 500 static void parse_extended_opts(e2fsck_t ctx, const char *opts)
 501 {
 502         char    *buf, *token, *next, *p, *arg;
 503         int     ea_ver;
 504         int     extended_usage = 0;
 505
 506         buf = string_copy(ctx, opts, 0);
 507         for (token = buf; token && *token; token = next) {
 508                 p = strchr(token, ',');
 509                 next = 0;
 510                 if (p) {
 511                         *p = 0;
 512                         next = p+1;
 513                 }
 514                 arg = strchr(token, '=');
 515                 if (arg) {
 516                         *arg = 0;
 517                         arg++;
 518                 }
 519                 if (strcmp(token, "ea_ver") == 0) {
 520                         if (!arg) {
 521                                 extended_usage++;
 522                                 continue;
 523                         }
 524                         ea_ver = strtoul(arg, &p, 0);
 525                         if (*p ||
 526                             ((ea_ver != 1) && (ea_ver != 2))) {
 527                                 fprintf(stderr,
 528                                         _("Invalid EA version.\n"));
 529                                 extended_usage++;
 530                                 continue;
 531                         }
 532                         ctx->ext_attr_ver = ea_ver;
 533                 } else
 534                         extended_usage++;
 535         }
 536         if (extended_usage) {
 537                 fprintf(stderr, _("Extended options are separated by commas, "
 538                         "and may take an argument which\n"
 539                         "is set off by an equals ('=') sign.  "
 540                         "Valid raid options are:\n"
 541                         "\tea_ver=<ea_version (1 or 2)\n\n"));
 542                 exit(1);
 543         }
 544 }
 545
 546
 547 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 548 {
 549         int             flush = 0;
 550         int             c, fd;
 551 #ifdef MTRACE
 552         extern void     *mallwatch;
 553 #endif
 554         e2fsck_t        ctx;
 555         errcode_t       retval;
 556 #ifdef HAVE_SIGNAL_H
 557         struct sigaction        sa;
 558 #endif
 559         char            *extended_opts = 0;
 560
 561         retval = e2fsck_allocate_context(&ctx);
 562         if (retval)
 563                 return retval;
 564
 565         *ret_ctx = ctx;
 566
 567         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
 568         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
 569         if (isatty(0) && isatty(1)) {
 570                 ctx->interactive = 1;
 571         } else {
 572                 ctx->start_meta[0] = '\001';
 573                 ctx->stop_meta[0] = '\002';
 574         }
 575         memset(bar, '=', sizeof(bar)-1);
 576         memset(spaces, ' ', sizeof(spaces)-1);
 577         initialize_ext2_error_table();
 578         blkid_get_cache(&ctx->blkid, NULL);
 579
 580         if (argc && *argv)
 581                 ctx->program_name = *argv;
 582         else
 583                 ctx->program_name = "e2fsck";
 584         while ((c = getopt (argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDk")) != EOF)
 585                 switch (c) {
 586                 case 'C':
 587                         ctx->progress = e2fsck_update_progress;
 588                         ctx->progress_fd = atoi(optarg);
 589                         if (!ctx->progress_fd)
 590                                 break;
 591                         /* Validate the file descriptor to avoid disasters */
 592                         fd = dup(ctx->progress_fd);
 593                         if (fd < 0) {
 594                                 fprintf(stderr,
 595                                 _("Error validating file descriptor %d: %s\n"),
 596                                         ctx->progress_fd,
 597                                         error_message(errno));
 598                                 fatal_error(ctx,
 599                         _("Invalid completion information file descriptor"));
 600                         } else
 601                                 close(fd);
 602                         break;
 603                 case 'D':
 604                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 605                         break;
 606                 case 'E':
 607                         extended_opts = optarg;
 608                         break;
 609                 case 'p':
 610                 case 'a':
 611                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
 612                         conflict_opt:
 613                                 fatal_error(ctx,
 614         _("Only one the options -p/-a, -n or -y may be specified."));
 615                         }
 616                         ctx->options |= E2F_OPT_PREEN;
 617                         break;
 618                 case 'n':
 619                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
 620                                 goto conflict_opt;
 621                         ctx->options |= E2F_OPT_NO;
 622                         break;
 623                 case 'y':
 624                         if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
 625                                 goto conflict_opt;
 626                         ctx->options |= E2F_OPT_YES;
 627                         break;
 628                 case 't':
 629 #ifdef RESOURCE_TRACK
 630                         if (ctx->options & E2F_OPT_TIME)
 631                                 ctx->options |= E2F_OPT_TIME2;
 632                         else
 633                                 ctx->options |= E2F_OPT_TIME;
 634 #else
 635                         fprintf(stderr, _("The -t option is not "
 636                                 "supported on this version of e2fsck.\n"));
 637 #endif
 638                         break;
 639                 case 'c':
 640                         if (cflag++)
 641                                 ctx->options |= E2F_OPT_WRITECHECK;
 642                         ctx->options |= E2F_OPT_CHECKBLOCKS;
 643                         break;
 644                 case 'r':
 645                         /* What we do by default, anyway! */
 646                         break;
 647                 case 'b':
 648                         ctx->use_superblock = atoi(optarg);
 649                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
 650                         break;
 651                 case 'B':
 652                         ctx->blocksize = atoi(optarg);
 653                         break;
 654                 case 'I':
 655                         ctx->inode_buffer_blocks = atoi(optarg);
 656                         break;
 657                 case 'j':
 658                         ctx->journal_name = string_copy(ctx, optarg, 0);
 659                         break;
 660                 case 'P':
 661                         ctx->process_inode_size = atoi(optarg);
 662                         break;
 663                 case 'L':
 664                         replace_bad_blocks++;
 665                 case 'l':
 666                         bad_blocks_file = string_copy(ctx, optarg, 0);
 667                         break;
 668                 case 'd':
 669                         ctx->options |= E2F_OPT_DEBUG;
 670                         break;
 671                 case 'f':
 672                         ctx->options |= E2F_OPT_FORCE;
 673                         break;
 674                 case 'F':
 675                         flush = 1;
 676                         break;
 677                 case 'v':
 678                         verbose = 1;
 679                         break;
 680                 case 'V':
 681                         show_version_only = 1;
 682                         break;
 683 #ifdef MTRACE
 684                 case 'M':
 685                         mallwatch = (void *) strtol(optarg, NULL, 0);
 686                         break;
 687 #endif
 688                 case 'N':
 689                         ctx->device_name = optarg;
 690                         break;
 691 #ifdef ENABLE_SWAPFS
 692                 case 's':
 693                         normalize_swapfs = 1;
 694                 case 'S':
 695                         swapfs = 1;
 696                         break;
 697 #else
 698                 case 's':
 699                 case 'S':
 700                         fprintf(stderr, _("Byte-swapping filesystems "
 701                                           "not compiled in this version "
 702                                           "of e2fsck\n"));
 703                         exit(1);
 704 #endif
 705                 case 'k':
 706                         keep_bad_blocks++;
 707                         break;
 708                 default:
 709                         usage(ctx);
 710                 }
 711         if (show_version_only)
 712                 return 0;
 713         if (optind != argc - 1)
 714                 usage(ctx);
 715         if ((ctx->options & E2F_OPT_NO) && !bad_blocks_file &&
 716             !cflag && !swapfs && !(ctx->options & E2F_OPT_COMPRESS_DIRS))
 717                 ctx->options |= E2F_OPT_READONLY;
 718         ctx->io_options = strchr(argv[optind], '?');
 719         if (ctx->io_options)
 720                 *ctx->io_options++ = 0;
 721         ctx->filesystem_name = blkid_get_devname(ctx->blkid, argv[optind], 0);
 722         if (!ctx->filesystem_name) {
 723                 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
 724                         argv[optind]);
 725                 fatal_error(ctx, 0);
 726         }
 727         if (extended_opts)
 728                 parse_extended_opts(ctx, extended_opts);
 729
 730         if (flush) {
 731                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
 732                 if (fd < 0) {
 733                         com_err("open", errno,
 734                                 _("while opening %s for flushing"),
 735                                 ctx->filesystem_name);
 736                         fatal_error(ctx, 0);
 737                 }
 738                 if ((retval = ext2fs_sync_device(fd, 1))) {
 739                         com_err("ext2fs_sync_device", retval,
 740                                 _("while trying to flush %s"),
 741                                 ctx->filesystem_name);
 742                         fatal_error(ctx, 0);
 743                 }
 744                 close(fd);
 745         }
 746 #ifdef ENABLE_SWAPFS
 747         if (swapfs) {
 748                 if (cflag || bad_blocks_file) {
 749                         fprintf(stderr, _("Incompatible options not "
 750                                           "allowed when byte-swapping.\n"));
 751                         exit(FSCK_USAGE);
 752                 }
 753         }
 754 #endif
 755         if (cflag && bad_blocks_file) {
 756                 fprintf(stderr, _("The -c and the -l/-L options may "
 757                                   "not be both used at the same time.\n"));
 758                 exit(FSCK_USAGE);
 759         }
 760 #ifdef HAVE_SIGNAL_H
 761         /*
 762          * Set up signal action
 763          */
 764         memset(&sa, 0, sizeof(struct sigaction));
 765         sa.sa_handler = signal_cancel;
 766         sigaction(SIGINT, &sa, 0);
 767         sigaction(SIGTERM, &sa, 0);
 768 #ifdef SA_RESTART
 769         sa.sa_flags = SA_RESTART;
 770 #endif
 771         e2fsck_global_ctx = ctx;
 772         sa.sa_handler = signal_progress_on;
 773         sigaction(SIGUSR1, &sa, 0);
 774         sa.sa_handler = signal_progress_off;
 775         sigaction(SIGUSR2, &sa, 0);
 776 #endif
 777
 778         /* Update our PATH to include /sbin if we need to run badblocks  */
 779         if (cflag) {
 780                 char *oldpath = getenv("PATH");
 781                 if (oldpath) {
 782                         char *newpath;
 783
 784                         newpath = (char *) malloc(sizeof (PATH_SET) + 1 +
 785                                                   strlen (oldpath));
 786                         if (!newpath)
 787                                 fatal_error(ctx, "Couldn't malloc() newpath");
 788                         strcpy (newpath, PATH_SET);
 789                         strcat (newpath, ":");
 790                         strcat (newpath, oldpath);
 791                         putenv (newpath);
 792                 } else
 793                         putenv (PATH_SET);
 794         }
 795 #ifdef CONFIG_JBD_DEBUG
 796         if (getenv("E2FSCK_JBD_DEBUG"))
 797                 journal_enable_debug = atoi(getenv("E2FSCK_JBD_DEBUG"));
 798 #endif
 799         return 0;
 800 }
 801
 802 static const char *my_ver_string = E2FSPROGS_VERSION;
 803 static const char *my_ver_date = E2FSPROGS_DATE;
 804
 805 int main (int argc, char *argv[])
 806 {
 807         errcode_t       retval = 0;
 808         int             exit_value = FSCK_OK;
 809         ext2_filsys     fs = 0;
 810         io_manager      io_ptr;
 811         struct ext2_super_block *sb;
 812         const char      *lib_ver_date;
 813         int             my_ver, lib_ver;
 814         e2fsck_t        ctx;
 815         struct problem_context pctx;
 816         int flags, run_result;
 817
 818         clear_problem_context(&pctx);
 819 #ifdef MTRACE
 820         mtrace();
 821 #endif
 822 #ifdef MCHECK
 823         mcheck(0);
 824 #endif
 825 #ifdef ENABLE_NLS
 826         setlocale(LC_MESSAGES, "");
 827         setlocale(LC_CTYPE, "");
 828         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 829         textdomain(NLS_CAT_NAME);
 830 #endif
 831         my_ver = ext2fs_parse_version_string(my_ver_string);
 832         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
 833         if (my_ver > lib_ver) {
 834                 fprintf( stderr, _("Error: ext2fs library version "
 835                         "out of date!\n"));
 836                 show_version_only++;
 837         }
 838
 839         retval = PRS(argc, argv, &ctx);
 840         if (retval) {
 841                 com_err("e2fsck", retval,
 842                         _("while trying to initialize program"));
 843                 exit(FSCK_ERROR);
 844         }
 845         reserve_stdio_fds();
 846
 847 #ifdef RESOURCE_TRACK
 848         init_resource_track(&ctx->global_rtrack);
 849 #endif
 850
 851         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
 852                 fprintf(stderr, "e2fsck %s (%s)\n", my_ver_string,
 853                          my_ver_date);
 854
 855         if (show_version_only) {
 856                 fprintf(stderr, _("\tUsing %s, %s\n"),
 857                         error_message(EXT2_ET_BASE), lib_ver_date);
 858                 exit(FSCK_OK);
 859         }
 860
 861         check_mount(ctx);
 862
 863         if (!(ctx->options & E2F_OPT_PREEN) &&
 864             !(ctx->options & E2F_OPT_NO) &&
 865             !(ctx->options & E2F_OPT_YES)) {
 866                 if (!ctx->interactive)
 867                         fatal_error(ctx,
 868                                     _("need terminal for interactive repairs"));
 869         }
 870         ctx->superblock = ctx->use_superblock;
 871 restart:
 872 #ifdef CONFIG_TESTIO_DEBUG
 873         io_ptr = test_io_manager;
 874         test_io_backing_manager = unix_io_manager;
 875 #else
 876         io_ptr = unix_io_manager;
 877 #endif
 878         flags = 0;
 879         if ((ctx->options & E2F_OPT_READONLY) == 0)
 880                 flags |= EXT2_FLAG_RW;
 881
 882         if (ctx->superblock && ctx->blocksize) {
 883                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
 884                                       flags, ctx->superblock, ctx->blocksize,
 885                                       io_ptr, &fs);
 886         } else if (ctx->superblock) {
 887                 int blocksize;
 888                 for (blocksize = EXT2_MIN_BLOCK_SIZE;
 889                      blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
 890                         retval = ext2fs_open2(ctx->filesystem_name,
 891                                               ctx->io_options, flags,
 892                                               ctx->superblock, blocksize,
 893                                               io_ptr, &fs);
 894                         if (!retval)
 895                                 break;
 896                 }
 897         } else
 898                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
 899                                       flags, 0, 0, io_ptr, &fs);
 900         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
 901             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
 902             ((retval == EXT2_ET_BAD_MAGIC) ||
 903              ((retval == 0) && ext2fs_check_desc(fs)))) {
 904                 if (!fs || (fs->group_desc_count > 1)) {
 905                         printf(_("%s trying backup blocks...\n"),
 906                                retval ? _("Couldn't find ext2 superblock,") :
 907                                _("Group descriptors look bad..."));
 908                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
 909                         if (fs)
 910                                 ext2fs_close(fs);
 911                         goto restart;
 912                 }
 913         }
 914         if (retval) {
 915                 com_err(ctx->program_name, retval, _("while trying to open %s"),
 916                         ctx->filesystem_name);
 917                 if (retval == EXT2_ET_REV_TOO_HIGH) {
 918                         printf(_("The filesystem revision is apparently "
 919                                "too high for this version of e2fsck.\n"
 920                                "(Or the filesystem superblock "
 921                                "is corrupt)\n\n"));
 922                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
 923                 } else if (retval == EXT2_ET_SHORT_READ)
 924                         printf(_("Could this be a zero-length partition?\n"));
 925                 else if ((retval == EPERM) || (retval == EACCES))
 926                         printf(_("You must have %s access to the "
 927                                "filesystem or be root\n"),
 928                                (ctx->options & E2F_OPT_READONLY) ?
 929                                "r/o" : "r/w");
 930                 else if (retval == ENXIO)
 931                         printf(_("Possibly non-existent or swap device?\n"));
 932 #ifdef EROFS
 933                 else if (retval == EROFS)
 934                         printf(_("Disk write-protected; use the -n option "
 935                                "to do a read-only\n"
 936                                "check of the device.\n"));
 937 #endif
 938                 else
 939                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
 940                 fatal_error(ctx, 0);
 941         }
 942         ctx->fs = fs;
 943         fs->priv_data = ctx;
 944         sb = fs->super;
 945         if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
 946                 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
 947                         _("while trying to open %s"),
 948                         ctx->filesystem_name);
 949         get_newer:
 950                 fatal_error(ctx, _("Get a newer version of e2fsck!"));
 951         }
 952
 953         /*
 954          * Set the device name, which is used whenever we print error
 955          * or informational messages to the user.
 956          */
 957         if (ctx->device_name == 0 &&
 958             (sb->s_volume_name[0] != 0)) {
 959                 ctx->device_name = string_copy(ctx, sb->s_volume_name,
 960                                                sizeof(sb->s_volume_name));
 961         }
 962         if (ctx->device_name == 0)
 963                 ctx->device_name = ctx->filesystem_name;
 964
 965         /*
 966          * Make sure the ext3 superblock fields are consistent.
 967          */
 968         retval = e2fsck_check_ext3_journal(ctx);
 969         if (retval) {
 970                 com_err(ctx->program_name, retval,
 971                         _("while checking ext3 journal for %s"),
 972                         ctx->device_name);
 973                 fatal_error(ctx, 0);
 974         }
 975
 976         /*
 977          * Check to see if we need to do ext3-style recovery.  If so,
 978          * do it, and then restart the fsck.
 979          */
 980         if (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) {
 981                 if (ctx->options & E2F_OPT_READONLY) {
 982                         printf(_("Warning: skipping journal recovery "
 983                                  "because doing a read-only filesystem "
 984                                  "check.\n"));
 985                         io_channel_flush(ctx->fs->io);
 986                 } else {
 987                         if (ctx->flags & E2F_FLAG_RESTARTED) {
 988                                 /*
 989                                  * Whoops, we attempted to run the
 990                                  * journal twice.  This should never
 991                                  * happen, unless the hardware or
 992                                  * device driver is being bogus.
 993                                  */
 994                                 com_err(ctx->program_name, 0,
 995                                         _("unable to set superblock flags on %s\n"), ctx->device_name);
 996                                 fatal_error(ctx, 0);
 997                         }
 998                         retval = e2fsck_run_ext3_journal(ctx);
 999                         if (retval) {
1000                                 com_err(ctx->program_name, retval,
1001                                 _("while recovering ext3 journal of %s"),
1002                                         ctx->device_name);
1003                                 fatal_error(ctx, 0);
1004                         }
1005                         ext2fs_close(ctx->fs);
1006                         ctx->fs = 0;
1007                         ctx->flags |= E2F_FLAG_RESTARTED;
1008                         goto restart;
1009                 }
1010         }
1011
1012         /*
1013          * Check for compatibility with the feature sets.  We need to
1014          * be more stringent than ext2fs_open().
1015          */
1016         if ((sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) ||
1017             (sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP)) {
1018                 com_err(ctx->program_name, EXT2_ET_UNSUPP_FEATURE,
1019                         "(%s)", ctx->device_name);
1020                 goto get_newer;
1021         }
1022         if (sb->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) {
1023                 com_err(ctx->program_name, EXT2_ET_RO_UNSUPP_FEATURE,
1024                         "(%s)", ctx->device_name);
1025                 goto get_newer;
1026         }
1027 #ifdef ENABLE_COMPRESSION
1028         if (sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_COMPRESSION)
1029                 com_err(ctx->program_name, 0,
1030                         _("Warning: compression support is experimental.\n"));
1031 #endif
1032 #ifndef ENABLE_HTREE
1033         if (sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) {
1034                 com_err(ctx->program_name, 0,
1035                         _("E2fsck not compiled with HTREE support,\n\t"
1036                           "but filesystem %s has HTREE directories.\n"),
1037                         ctx->device_name);
1038                 goto get_newer;
1039         }
1040 #endif
1041
1042         /*
1043          * If the user specified a specific superblock, presumably the
1044          * master superblock has been trashed.  So we mark the
1045          * superblock as dirty, so it can be written out.
1046          */
1047         if (ctx->superblock &&
1048             !(ctx->options & E2F_OPT_READONLY))
1049                 ext2fs_mark_super_dirty(fs);
1050
1051         /*
1052          * We only update the master superblock because (a) paranoia;
1053          * we don't want to corrupt the backup superblocks, and (b) we
1054          * don't need to update the mount count and last checked
1055          * fields in the backup superblock (the kernel doesn't
1056          * update the backup superblocks anyway).
1057          */
1058         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
1059
1060         ehandler_init(fs->io);
1061
1062         if (ctx->superblock)
1063                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
1064         ext2fs_mark_valid(fs);
1065         check_super_block(ctx);
1066         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1067                 fatal_error(ctx, 0);
1068         check_if_skip(ctx);
1069         if (bad_blocks_file)
1070                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
1071         else if (cflag)
1072                 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
1073         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1074                 fatal_error(ctx, 0);
1075 #ifdef ENABLE_SWAPFS
1076         if (normalize_swapfs) {
1077                 if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ==
1078                     ext2fs_native_flag()) {
1079                         fprintf(stderr, _("%s: Filesystem byte order "
1080                                 "already normalized.\n"), ctx->device_name);
1081                         fatal_error(ctx, 0);
1082                 }
1083         }
1084         if (swapfs) {
1085                 swap_filesys(ctx);
1086                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1087                         fatal_error(ctx, 0);
1088         }
1089 #endif
1090
1091         /*
1092          * Mark the system as valid, 'til proven otherwise
1093          */
1094         ext2fs_mark_valid(fs);
1095
1096         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
1097         if (retval) {
1098                 com_err(ctx->program_name, retval,
1099                         _("while reading bad blocks inode"));
1100                 preenhalt(ctx);
1101                 printf(_("This doesn't bode well,"
1102                          " but we'll try to go on...\n"));
1103         }
1104
1105         run_result = e2fsck_run(ctx);
1106         e2fsck_clear_progbar(ctx);
1107         if (run_result == E2F_FLAG_RESTART) {
1108                 printf(_("Restarting e2fsck from the beginning...\n"));
1109                 retval = e2fsck_reset_context(ctx);
1110                 if (retval) {
1111                         com_err(ctx->program_name, retval,
1112                                 _("while resetting context"));
1113                         fatal_error(ctx, 0);
1114                 }
1115                 ext2fs_close(fs);
1116                 goto restart;
1117         }
1118         if (run_result & E2F_FLAG_CANCEL) {
1119                 printf(_("%s: e2fsck canceled.\n"), ctx->device_name ?
1120                        ctx->device_name : ctx->filesystem_name);
1121                 exit_value |= FSCK_CANCELED;
1122         }
1123         if (run_result & E2F_FLAG_ABORT)
1124                 fatal_error(ctx, _("aborted"));
1125
1126 #ifdef MTRACE
1127         mtrace_print("Cleanup");
1128 #endif
1129         if (ext2fs_test_changed(fs)) {
1130                 exit_value |= FSCK_NONDESTRUCT;
1131                 if (!(ctx->options & E2F_OPT_PREEN))
1132                     printf(_("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
1133                                ctx->device_name);
1134                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
1135                         printf(_("%s: ***** REBOOT LINUX *****\n"),
1136                                ctx->device_name);
1137                         exit_value |= FSCK_REBOOT;
1138                 }
1139         }
1140         if (!ext2fs_test_valid(fs)) {
1141                 printf(_("\n%s: ********** WARNING: Filesystem still has "
1142                          "errors **********\n\n"), ctx->device_name);
1143                 exit_value |= FSCK_UNCORRECTED;
1144                 exit_value &= ~FSCK_NONDESTRUCT;
1145         }
1146         if (exit_value & FSCK_CANCELED)
1147                 exit_value &= ~FSCK_NONDESTRUCT;
1148         else {
1149                 show_stats(ctx);
1150                 if (!(ctx->options & E2F_OPT_READONLY)) {
1151                         if (ext2fs_test_valid(fs)) {
1152                                 if (!(sb->s_state & EXT2_VALID_FS))
1153                                         exit_value |= FSCK_NONDESTRUCT;
1154                                 sb->s_state = EXT2_VALID_FS;
1155                         } else
1156                                 sb->s_state &= ~EXT2_VALID_FS;
1157                         sb->s_mnt_count = 0;
1158                         sb->s_lastcheck = time(NULL);
1159                         ext2fs_mark_super_dirty(fs);
1160                 }
1161         }
1162
1163         e2fsck_write_bitmaps(ctx);
1164
1165         ext2fs_close(fs);
1166         ctx->fs = NULL;
1167         free(ctx->filesystem_name);
1168         free(ctx->journal_name);
1169         e2fsck_free_context(ctx);
1170
1171 #ifdef RESOURCE_TRACK
1172         if (ctx->options & E2F_OPT_TIME)
1173                 print_resource_track(NULL, &ctx->global_rtrack);
1174 #endif
1175
1176         return exit_value;
1177 }