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