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 external_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
 183          * filesystem and it's mounted read-only, and we're not doing
 184          * a read/write check, then everything's fine.
 185          */
 186         if ((!(ctx->mount_flags & EXT2_MF_MOUNTED)) ||
 187             ((ctx->mount_flags & EXT2_MF_ISROOT) &&
 188              (ctx->mount_flags & EXT2_MF_READONLY) &&
 189              !(ctx->options & E2F_OPT_WRITECHECK)))
 190                 return;
 191
 192         if ((ctx->options & E2F_OPT_READONLY) &&
 193             !(ctx->options & E2F_OPT_WRITECHECK)) {
 194                 printf(_("Warning!  %s is mounted.\n"), ctx->filesystem_name);
 195                 return;
 196         }
 197
 198         printf(_("%s is mounted.  "), ctx->filesystem_name);
 199         if (!ctx->interactive)
 200                 fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
 201         printf(_("\n\n\007\007\007\007WARNING!!!  "
 202                "Running e2fsck on a mounted filesystem may cause\n"
 203                "SEVERE filesystem damage.\007\007\007\n\n"));
 204         cont = ask_yn(_("Do you really want to continue"), -1);
 205         if (!cont) {
 206                 printf (_("check aborted.\n"));
 207                 exit (0);
 208         }
 209         return;
 210 }
 211
 212 static int is_on_batt(void)
 213 {
 214         FILE    *f;
 215         DIR     *d;
 216         char    tmp[80], tmp2[80], fname[80];
 217         unsigned int    acflag;
 218         struct dirent*  de;
 219
 220         f = fopen("/proc/apm", "r");
 221         if (f) {
 222                 if (fscanf(f, "%s %s %s %x", tmp, tmp, tmp, &acflag) != 4)
 223                         acflag = 1;
 224                 fclose(f);
 225                 return (acflag != 1);
 226         }
 227         d = opendir("/proc/acpi/ac_adapter");
 228         if (d) {
 229                 while ((de=readdir(d)) != NULL) {
 230                         if (!strncmp(".", de->d_name, 1))
 231                                 continue;
 232                         snprintf(fname, 80, "/proc/acpi/ac_adapter/%s/state",
 233                                  de->d_name);
 234                         f = fopen(fname, "r");
 235                         if (!f)
 236                                 continue;
 237                         if (fscanf(f, "%s %s", tmp2, tmp) != 2)
 238                                 tmp[0] = 0;
 239                         fclose(f);
 240                         if (strncmp(tmp, "off-line", 8) == 0) {
 241                                 closedir(d);
 242                                 return 1;
 243                         }
 244                 }
 245                 closedir(d);
 246         }
 247         return 0;
 248 }
 249
 250 /*
 251  * This routine checks to see if a filesystem can be skipped; if so,
 252  * it will exit with E2FSCK_OK.  Under some conditions it will print a
 253  * message explaining why a check is being forced.
 254  */
 255 static void check_if_skip(e2fsck_t ctx)
 256 {
 257         ext2_filsys fs = ctx->fs;
 258         const char *reason = NULL;
 259         unsigned int reason_arg = 0;
 260         long next_check;
 261         int batt = is_on_batt();
 262
 263         if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file ||
 264             cflag || swapfs)
 265                 return;
 266
 267         if ((fs->super->s_state & EXT2_ERROR_FS) ||
 268             !ext2fs_test_valid(fs))
 269                 reason = _(" contains a file system with errors");
 270         else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
 271                 reason = _(" was not cleanly unmounted");
 272         else if ((fs->super->s_max_mnt_count > 0) &&
 273                  (fs->super->s_mnt_count >=
 274                   (unsigned) fs->super->s_max_mnt_count)) {
 275                 reason = _(" has been mounted %u times without being checked");
 276                 reason_arg = fs->super->s_mnt_count;
 277                 if (batt && (fs->super->s_mnt_count <
 278                              (unsigned) fs->super->s_max_mnt_count*2))
 279                         reason = 0;
 280         } else if (fs->super->s_checkinterval &&
 281                    ((ctx->now - fs->super->s_lastcheck) >=
 282                     fs->super->s_checkinterval)) {
 283                 reason = _(" has gone %u days without being checked");
 284                 reason_arg = (ctx->now - fs->super->s_lastcheck)/(3600*24);
 285                 if (batt && ((ctx->now - fs->super->s_lastcheck) <
 286                              fs->super->s_checkinterval*2))
 287                         reason = 0;
 288         }
 289         if (reason) {
 290                 fputs(ctx->device_name, stdout);
 291                 printf(reason, reason_arg);
 292                 fputs(_(", check forced.\n"), stdout);
 293                 return;
 294         }
 295         printf(_("%s: clean, %d/%d files, %d/%d blocks"), ctx->device_name,
 296                fs->super->s_inodes_count - fs->super->s_free_inodes_count,
 297                fs->super->s_inodes_count,
 298                fs->super->s_blocks_count - fs->super->s_free_blocks_count,
 299                fs->super->s_blocks_count);
 300         next_check = 100000;
 301         if (fs->super->s_max_mnt_count > 0) {
 302                 next_check = fs->super->s_max_mnt_count - fs->super->s_mnt_count;
 303                 if (next_check <= 0)
 304                         next_check = 1;
 305         }
 306         if (fs->super->s_checkinterval &&
 307             ((ctx->now - fs->super->s_lastcheck) >= fs->super->s_checkinterval))
 308                 next_check = 1;
 309         if (next_check <= 5) {
 310                 if (next_check == 1)
 311                         fputs(_(" (check after next mount)"), stdout);
 312                 else
 313                         printf(_(" (check in %ld mounts)"), next_check);
 314         }
 315         fputc('\n', stdout);
 316         ext2fs_close(fs);
 317         ctx->fs = NULL;
 318         e2fsck_free_context(ctx);
 319         exit(FSCK_OK);
 320 }
 321
 322 /*
 323  * For completion notice
 324  */
 325 struct percent_tbl {
 326         int     max_pass;
 327         int     table[32];
 328 };
 329 struct percent_tbl e2fsck_tbl = {
 330         5, { 0, 70, 90, 92,  95, 100 }
 331 };
 332 static char bar[128], spaces[128];
 333
 334 static float calc_percent(struct percent_tbl *tbl, int pass, int curr,
 335                           int max)
 336 {
 337         float   percent;
 338
 339         if (pass <= 0)
 340                 return 0.0;
 341         if (pass > tbl->max_pass || max == 0)
 342                 return 100.0;
 343         percent = ((float) curr) / ((float) max);
 344         return ((percent * (tbl->table[pass] - tbl->table[pass-1]))
 345                 + tbl->table[pass-1]);
 346 }
 347
 348 extern void e2fsck_clear_progbar(e2fsck_t ctx)
 349 {
 350         if (!(ctx->flags & E2F_FLAG_PROG_BAR))
 351                 return;
 352
 353         printf("%s%s\r%s", ctx->start_meta, spaces + (sizeof(spaces) - 80),
 354                ctx->stop_meta);
 355         fflush(stdout);
 356         ctx->flags &= ~E2F_FLAG_PROG_BAR;
 357 }
 358
 359 int e2fsck_simple_progress(e2fsck_t ctx, const char *label, float percent,
 360                            unsigned int dpynum)
 361 {
 362         static const char spinner[] = "\\|/-";
 363         int     i;
 364         unsigned int    tick;
 365         struct timeval  tv;
 366         int dpywidth;
 367         int fixed_percent;
 368
 369         if (ctx->flags & E2F_FLAG_PROG_SUPPRESS)
 370                 return 0;
 371
 372         /*
 373          * Calculate the new progress position.  If the
 374          * percentage hasn't changed, then we skip out right
 375          * away.
 376          */
 377         fixed_percent = (int) ((10 * percent) + 0.5);
 378         if (ctx->progress_last_percent == fixed_percent)
 379                 return 0;
 380         ctx->progress_last_percent = fixed_percent;
 381
 382         /*
 383          * If we've already updated the spinner once within
 384          * the last 1/8th of a second, no point doing it
 385          * again.
 386          */
 387         gettimeofday(&tv, NULL);
 388         tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8));
 389         if ((tick == ctx->progress_last_time) &&
 390             (fixed_percent != 0) && (fixed_percent != 1000))
 391                 return 0;
 392         ctx->progress_last_time = tick;
 393
 394         /*
 395          * Advance the spinner, and note that the progress bar
 396          * will be on the screen
 397          */
 398         ctx->progress_pos = (ctx->progress_pos+1) & 3;
 399         ctx->flags |= E2F_FLAG_PROG_BAR;
 400
 401         dpywidth = 66 - strlen(label);
 402         dpywidth = 8 * (dpywidth / 8);
 403         if (dpynum)
 404                 dpywidth -= 8;
 405
 406         i = ((percent * dpywidth) + 50) / 100;
 407         printf("%s%s: |%s%s", ctx->start_meta, label,
 408                bar + (sizeof(bar) - (i+1)),
 409                spaces + (sizeof(spaces) - (dpywidth - i + 1)));
 410         if (fixed_percent == 1000)
 411                 fputc('|', stdout);
 412         else
 413                 fputc(spinner[ctx->progress_pos & 3], stdout);
 414         printf(" %4.1f%%  ", percent);
 415         if (dpynum)
 416                 printf("%u\r", dpynum);
 417         else
 418                 fputs(" \r", stdout);
 419         fputs(ctx->stop_meta, stdout);
 420
 421         if (fixed_percent == 1000)
 422                 e2fsck_clear_progbar(ctx);
 423         fflush(stdout);
 424
 425         return 0;
 426 }
 427
 428 static int e2fsck_update_progress(e2fsck_t ctx, int pass,
 429                                   unsigned long cur, unsigned long max)
 430 {
 431         char buf[80];
 432         float percent;
 433
 434         if (pass == 0)
 435                 return 0;
 436
 437         if (ctx->progress_fd) {
 438                 sprintf(buf, "%d %lu %lu\n", pass, cur, max);
 439                 write(ctx->progress_fd, buf, strlen(buf));
 440         } else {
 441                 percent = calc_percent(&e2fsck_tbl, pass, cur, max);
 442                 e2fsck_simple_progress(ctx, ctx->device_name,
 443                                        percent, 0);
 444         }
 445         return 0;
 446 }
 447
 448 #define PATH_SET "PATH=/sbin"
 449
 450 static void reserve_stdio_fds(void)
 451 {
 452         int     fd;
 453
 454         while (1) {
 455                 fd = open("/dev/null", O_RDWR);
 456                 if (fd > 2)
 457                         break;
 458                 if (fd < 0) {
 459                         fprintf(stderr, _("ERROR: Couldn't open "
 460                                 "/dev/null (%s)\n"),
 461                                 strerror(errno));
 462                         break;
 463                 }
 464         }
 465         close(fd);
 466 }
 467
 468 #ifdef HAVE_SIGNAL_H
 469 static void signal_progress_on(int sig EXT2FS_ATTR((unused)))
 470 {
 471         e2fsck_t ctx = e2fsck_global_ctx;
 472
 473         if (!ctx)
 474                 return;
 475
 476         ctx->progress = e2fsck_update_progress;
 477         ctx->progress_fd = 0;
 478 }
 479
 480 static void signal_progress_off(int sig EXT2FS_ATTR((unused)))
 481 {
 482         e2fsck_t ctx = e2fsck_global_ctx;
 483
 484         if (!ctx)
 485                 return;
 486
 487         e2fsck_clear_progbar(ctx);
 488         ctx->progress = 0;
 489 }
 490
 491 static void signal_cancel(int sig EXT2FS_ATTR((unused)))
 492 {
 493         e2fsck_t ctx = e2fsck_global_ctx;
 494
 495         if (!ctx)
 496                 exit(FSCK_CANCELED);
 497
 498         ctx->flags |= E2F_FLAG_CANCEL;
 499 }
 500 #endif
 501
 502 static void parse_extended_opts(e2fsck_t ctx, const char *opts)
 503 {
 504         char    *buf, *token, *next, *p, *arg;
 505         int     ea_ver;
 506         int     extended_usage = 0;
 507
 508         buf = string_copy(ctx, opts, 0);
 509         for (token = buf; token && *token; token = next) {
 510                 p = strchr(token, ',');
 511                 next = 0;
 512                 if (p) {
 513                         *p = 0;
 514                         next = p+1;
 515                 }
 516                 arg = strchr(token, '=');
 517                 if (arg) {
 518                         *arg = 0;
 519                         arg++;
 520                 }
 521                 if (strcmp(token, "ea_ver") == 0) {
 522                         if (!arg) {
 523                                 extended_usage++;
 524                                 continue;
 525                         }
 526                         ea_ver = strtoul(arg, &p, 0);
 527                         if (*p ||
 528                             ((ea_ver != 1) && (ea_ver != 2))) {
 529                                 fprintf(stderr,
 530                                         _("Invalid EA version.\n"));
 531                                 extended_usage++;
 532                                 continue;
 533                         }
 534                         ctx->ext_attr_ver = ea_ver;
 535                 } else {
 536                         fprintf(stderr, _("Unknown extended option: %s\n"),
 537                                 token);
 538                         extended_usage++;
 539                 }
 540         }
 541         if (extended_usage) {
 542                 fputs(("\nExtended options are separated by commas, "
 543                        "and may take an argument which\n"
 544                        "is set off by an equals ('=') sign.  "
 545                         "Valid extended options are:\n"
 546                        "\tea_ver=<ea_version (1 or 2)>\n\n"), stderr);
 547                 exit(1);
 548         }
 549 }
 550
 551 static void syntax_err_report(const char *filename, long err, int line_num)
 552 {
 553         fprintf(stderr,
 554                 _("Syntax error in e2fsck config file (%s, line #%d)\n\t%s\n"),
 555                 filename, line_num, error_message(err));
 556         exit(FSCK_ERROR);
 557 }
 558
 559 static const char *config_fn[] = { "/etc/e2fsck.conf", 0 };
 560
 561 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 562 {
 563         int             flush = 0;
 564         int             c, fd;
 565 #ifdef MTRACE
 566         extern void     *mallwatch;
 567 #endif
 568         e2fsck_t        ctx;
 569         errcode_t       retval;
 570 #ifdef HAVE_SIGNAL_H
 571         struct sigaction        sa;
 572 #endif
 573         char            *extended_opts = 0;
 574         char            *cp;
 575
 576         retval = e2fsck_allocate_context(&ctx);
 577         if (retval)
 578                 return retval;
 579
 580         *ret_ctx = ctx;
 581
 582         setvbuf(stdout, NULL, _IONBF, BUFSIZ);
 583         setvbuf(stderr, NULL, _IONBF, BUFSIZ);
 584         if (isatty(0) && isatty(1)) {
 585                 ctx->interactive = 1;
 586         } else {
 587                 ctx->start_meta[0] = '\001';
 588                 ctx->stop_meta[0] = '\002';
 589         }
 590         memset(bar, '=', sizeof(bar)-1);
 591         memset(spaces, ' ', sizeof(spaces)-1);
 592         initialize_ext2_error_table();
 593         initialize_prof_error_table();
 594         blkid_get_cache(&ctx->blkid, NULL);
 595
 596         if (argc && *argv)
 597                 ctx->program_name = *argv;
 598         else
 599                 ctx->program_name = "e2fsck";
 600         while ((c = getopt (argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDk")) != EOF)
 601                 switch (c) {
 602                 case 'C':
 603                         ctx->progress = e2fsck_update_progress;
 604                         ctx->progress_fd = atoi(optarg);
 605                         if (!ctx->progress_fd)
 606                                 break;
 607                         /* Validate the file descriptor to avoid disasters */
 608                         fd = dup(ctx->progress_fd);
 609                         if (fd < 0) {
 610                                 fprintf(stderr,
 611                                 _("Error validating file descriptor %d: %s\n"),
 612                                         ctx->progress_fd,
 613                                         error_message(errno));
 614                                 fatal_error(ctx,
 615                         _("Invalid completion information file descriptor"));
 616                         } else
 617                                 close(fd);
 618                         break;
 619                 case 'D':
 620                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 621                         break;
 622                 case 'E':
 623                         extended_opts = optarg;
 624                         break;
 625                 case 'p':
 626                 case 'a':
 627                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
 628                         conflict_opt:
 629                                 fatal_error(ctx,
 630         _("Only one of the options -p/-a, -n or -y may be specified."));
 631                         }
 632                         ctx->options |= E2F_OPT_PREEN;
 633                         break;
 634                 case 'n':
 635                         if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
 636                                 goto conflict_opt;
 637                         ctx->options |= E2F_OPT_NO;
 638                         break;
 639                 case 'y':
 640                         if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
 641                                 goto conflict_opt;
 642                         ctx->options |= E2F_OPT_YES;
 643                         break;
 644                 case 't':
 645 #ifdef RESOURCE_TRACK
 646                         if (ctx->options & E2F_OPT_TIME)
 647                                 ctx->options |= E2F_OPT_TIME2;
 648                         else
 649                                 ctx->options |= E2F_OPT_TIME;
 650 #else
 651                         fprintf(stderr, _("The -t option is not "
 652                                 "supported on this version of e2fsck.\n"));
 653 #endif
 654                         break;
 655                 case 'c':
 656                         if (cflag++)
 657                                 ctx->options |= E2F_OPT_WRITECHECK;
 658                         ctx->options |= E2F_OPT_CHECKBLOCKS;
 659                         break;
 660                 case 'r':
 661                         /* What we do by default, anyway! */
 662                         break;
 663                 case 'b':
 664                         ctx->use_superblock = atoi(optarg);
 665                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
 666                         break;
 667                 case 'B':
 668                         ctx->blocksize = atoi(optarg);
 669                         break;
 670                 case 'I':
 671                         ctx->inode_buffer_blocks = atoi(optarg);
 672                         break;
 673                 case 'j':
 674                         ctx->journal_name = string_copy(ctx, optarg, 0);
 675                         break;
 676                 case 'P':
 677                         ctx->process_inode_size = atoi(optarg);
 678                         break;
 679                 case 'L':
 680                         replace_bad_blocks++;
 681                 case 'l':
 682                         bad_blocks_file = string_copy(ctx, optarg, 0);
 683                         break;
 684                 case 'd':
 685                         ctx->options |= E2F_OPT_DEBUG;
 686                         break;
 687                 case 'f':
 688                         ctx->options |= E2F_OPT_FORCE;
 689                         break;
 690                 case 'F':
 691                         flush = 1;
 692                         break;
 693                 case 'v':
 694                         verbose = 1;
 695                         break;
 696                 case 'V':
 697                         show_version_only = 1;
 698                         break;
 699 #ifdef MTRACE
 700                 case 'M':
 701                         mallwatch = (void *) strtol(optarg, NULL, 0);
 702                         break;
 703 #endif
 704                 case 'N':
 705                         ctx->device_name = optarg;
 706                         break;
 707 #ifdef ENABLE_SWAPFS
 708                 case 's':
 709                         normalize_swapfs = 1;
 710                 case 'S':
 711                         swapfs = 1;
 712                         break;
 713 #else
 714                 case 's':
 715                 case 'S':
 716                         fprintf(stderr, _("Byte-swapping filesystems "
 717                                           "not compiled in this version "
 718                                           "of e2fsck\n"));
 719                         exit(1);
 720 #endif
 721                 case 'k':
 722                         keep_bad_blocks++;
 723                         break;
 724                 default:
 725                         usage(ctx);
 726                 }
 727         if (show_version_only)
 728                 return 0;
 729         if (optind != argc - 1)
 730                 usage(ctx);
 731         if ((ctx->options & E2F_OPT_NO) && !bad_blocks_file &&
 732             !cflag && !swapfs && !(ctx->options & E2F_OPT_COMPRESS_DIRS))
 733                 ctx->options |= E2F_OPT_READONLY;
 734         ctx->io_options = strchr(argv[optind], '?');
 735         if (ctx->io_options)
 736                 *ctx->io_options++ = 0;
 737         ctx->filesystem_name = blkid_get_devname(ctx->blkid, argv[optind], 0);
 738         if (!ctx->filesystem_name) {
 739                 com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
 740                         argv[optind]);
 741                 fatal_error(ctx, 0);
 742         }
 743         if (extended_opts)
 744                 parse_extended_opts(ctx, extended_opts);
 745
 746         if ((cp = getenv("E2FSCK_CONFIG")) != NULL)
 747                 config_fn[0] = cp;
 748         profile_set_syntax_err_cb(syntax_err_report);
 749         profile_init(config_fn, &ctx->profile);
 750
 751         if (flush) {
 752                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
 753                 if (fd < 0) {
 754                         com_err("open", errno,
 755                                 _("while opening %s for flushing"),
 756                                 ctx->filesystem_name);
 757                         fatal_error(ctx, 0);
 758                 }
 759                 if ((retval = ext2fs_sync_device(fd, 1))) {
 760                         com_err("ext2fs_sync_device", retval,
 761                                 _("while trying to flush %s"),
 762                                 ctx->filesystem_name);
 763                         fatal_error(ctx, 0);
 764                 }
 765                 close(fd);
 766         }
 767 #ifdef ENABLE_SWAPFS
 768         if (swapfs) {
 769                 if (cflag || bad_blocks_file) {
 770                         fprintf(stderr, _("Incompatible options not "
 771                                           "allowed when byte-swapping.\n"));
 772                         exit(FSCK_USAGE);
 773                 }
 774         }
 775 #endif
 776         if (cflag && bad_blocks_file) {
 777                 fprintf(stderr, _("The -c and the -l/-L options may "
 778                                   "not be both used at the same time.\n"));
 779                 exit(FSCK_USAGE);
 780         }
 781 #ifdef HAVE_SIGNAL_H
 782         /*
 783          * Set up signal action
 784          */
 785         memset(&sa, 0, sizeof(struct sigaction));
 786         sa.sa_handler = signal_cancel;
 787         sigaction(SIGINT, &sa, 0);
 788         sigaction(SIGTERM, &sa, 0);
 789 #ifdef SA_RESTART
 790         sa.sa_flags = SA_RESTART;
 791 #endif
 792         e2fsck_global_ctx = ctx;
 793         sa.sa_handler = signal_progress_on;
 794         sigaction(SIGUSR1, &sa, 0);
 795         sa.sa_handler = signal_progress_off;
 796         sigaction(SIGUSR2, &sa, 0);
 797 #endif
 798
 799         /* Update our PATH to include /sbin if we need to run badblocks  */
 800         if (cflag) {
 801                 char *oldpath = getenv("PATH");
 802                 if (oldpath) {
 803                         char *newpath;
 804
 805                         newpath = (char *) malloc(sizeof (PATH_SET) + 1 +
 806                                                   strlen (oldpath));
 807                         if (!newpath)
 808                                 fatal_error(ctx, "Couldn't malloc() newpath");
 809                         strcpy (newpath, PATH_SET);
 810                         strcat (newpath, ":");
 811                         strcat (newpath, oldpath);
 812                         putenv (newpath);
 813                 } else
 814                         putenv (PATH_SET);
 815         }
 816 #ifdef CONFIG_JBD_DEBUG
 817         if (getenv("E2FSCK_JBD_DEBUG"))
 818                 journal_enable_debug = atoi(getenv("E2FSCK_JBD_DEBUG"));
 819 #endif
 820         return 0;
 821 }
 822
 823 static const char *my_ver_string = E2FSPROGS_VERSION;
 824 static const char *my_ver_date = E2FSPROGS_DATE;
 825
 826 int main (int argc, char *argv[])
 827 {
 828         errcode_t       retval = 0;
 829         int             exit_value = FSCK_OK;
 830         ext2_filsys     fs = 0;
 831         io_manager      io_ptr;
 832         struct ext2_super_block *sb;
 833         const char      *lib_ver_date;
 834         int             my_ver, lib_ver;
 835         e2fsck_t        ctx;
 836         struct problem_context pctx;
 837         int flags, run_result;
 838
 839         clear_problem_context(&pctx);
 840 #ifdef MTRACE
 841         mtrace();
 842 #endif
 843 #ifdef MCHECK
 844         mcheck(0);
 845 #endif
 846 #ifdef ENABLE_NLS
 847         setlocale(LC_MESSAGES, "");
 848         setlocale(LC_CTYPE, "");
 849         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 850         textdomain(NLS_CAT_NAME);
 851 #endif
 852         my_ver = ext2fs_parse_version_string(my_ver_string);
 853         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
 854         if (my_ver > lib_ver) {
 855                 fprintf( stderr, _("Error: ext2fs library version "
 856                         "out of date!\n"));
 857                 show_version_only++;
 858         }
 859
 860         retval = PRS(argc, argv, &ctx);
 861         if (retval) {
 862                 com_err("e2fsck", retval,
 863                         _("while trying to initialize program"));
 864                 exit(FSCK_ERROR);
 865         }
 866         reserve_stdio_fds();
 867
 868 #ifdef RESOURCE_TRACK
 869         init_resource_track(&ctx->global_rtrack);
 870 #endif
 871
 872         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
 873                 fprintf(stderr, "e2fsck %s (%s)\n", my_ver_string,
 874                          my_ver_date);
 875
 876         if (show_version_only) {
 877                 fprintf(stderr, _("\tUsing %s, %s\n"),
 878                         error_message(EXT2_ET_BASE), lib_ver_date);
 879                 exit(FSCK_OK);
 880         }
 881
 882         check_mount(ctx);
 883
 884         if (!(ctx->options & E2F_OPT_PREEN) &&
 885             !(ctx->options & E2F_OPT_NO) &&
 886             !(ctx->options & E2F_OPT_YES)) {
 887                 if (!ctx->interactive)
 888                         fatal_error(ctx,
 889                                     _("need terminal for interactive repairs"));
 890         }
 891         ctx->superblock = ctx->use_superblock;
 892 restart:
 893 #ifdef CONFIG_TESTIO_DEBUG
 894         io_ptr = test_io_manager;
 895         test_io_backing_manager = unix_io_manager;
 896 #else
 897         io_ptr = unix_io_manager;
 898 #endif
 899         flags = 0;
 900         if ((ctx->options & E2F_OPT_READONLY) == 0)
 901                 flags |= EXT2_FLAG_RW;
 902
 903         if (ctx->superblock && ctx->blocksize) {
 904                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
 905                                       flags, ctx->superblock, ctx->blocksize,
 906                                       io_ptr, &fs);
 907         } else if (ctx->superblock) {
 908                 int blocksize;
 909                 for (blocksize = EXT2_MIN_BLOCK_SIZE;
 910                      blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
 911                         retval = ext2fs_open2(ctx->filesystem_name,
 912                                               ctx->io_options, flags,
 913                                               ctx->superblock, blocksize,
 914                                               io_ptr, &fs);
 915                         if (!retval)
 916                                 break;
 917                 }
 918         } else
 919                 retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options,
 920                                       flags, 0, 0, io_ptr, &fs);
 921         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
 922             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
 923             ((retval == EXT2_ET_BAD_MAGIC) ||
 924              ((retval == 0) && ext2fs_check_desc(fs)))) {
 925                 if (!fs || (fs->group_desc_count > 1)) {
 926                         printf(_("%s trying backup blocks...\n"),
 927                                retval ? _("Couldn't find ext2 superblock,") :
 928                                _("Group descriptors look bad..."));
 929                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
 930                         if (fs)
 931                                 ext2fs_close(fs);
 932                         goto restart;
 933                 }
 934         }
 935         if (retval) {
 936                 com_err(ctx->program_name, retval, _("while trying to open %s"),
 937                         ctx->filesystem_name);
 938                 if (retval == EXT2_ET_REV_TOO_HIGH) {
 939                         printf(_("The filesystem revision is apparently "
 940                                "too high for this version of e2fsck.\n"
 941                                "(Or the filesystem superblock "
 942                                "is corrupt)\n\n"));
 943                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
 944                 } else if (retval == EXT2_ET_SHORT_READ)
 945                         printf(_("Could this be a zero-length partition?\n"));
 946                 else if ((retval == EPERM) || (retval == EACCES))
 947                         printf(_("You must have %s access to the "
 948                                "filesystem or be root\n"),
 949                                (ctx->options & E2F_OPT_READONLY) ?
 950                                "r/o" : "r/w");
 951                 else if (retval == ENXIO)
 952                         printf(_("Possibly non-existent or swap device?\n"));
 953 #ifdef EROFS
 954                 else if (retval == EROFS)
 955                         printf(_("Disk write-protected; use the -n option "
 956                                "to do a read-only\n"
 957                                "check of the device.\n"));
 958 #endif
 959                 else
 960                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
 961                 fatal_error(ctx, 0);
 962         }
 963         ctx->fs = fs;
 964         fs->priv_data = ctx;
 965         fs->now = ctx->now;
 966         sb = fs->super;
 967         if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
 968                 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
 969                         _("while trying to open %s"),
 970                         ctx->filesystem_name);
 971         get_newer:
 972                 fatal_error(ctx, _("Get a newer version of e2fsck!"));
 973         }
 974
 975         /*
 976          * Set the device name, which is used whenever we print error
 977          * or informational messages to the user.
 978          */
 979         if (ctx->device_name == 0 &&
 980             (sb->s_volume_name[0] != 0)) {
 981                 ctx->device_name = string_copy(ctx, sb->s_volume_name,
 982                                                sizeof(sb->s_volume_name));
 983         }
 984         if (ctx->device_name == 0)
 985                 ctx->device_name = ctx->filesystem_name;
 986
 987         /*
 988          * Make sure the ext3 superblock fields are consistent.
 989          */
 990         retval = e2fsck_check_ext3_journal(ctx);
 991         if (retval) {
 992                 com_err(ctx->program_name, retval,
 993                         _("while checking ext3 journal for %s"),
 994                         ctx->device_name);
 995                 fatal_error(ctx, 0);
 996         }
 997
 998         /*
 999          * Check to see if we need to do ext3-style recovery.  If so,
1000          * do it, and then restart the fsck.
1001          */
1002         if (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) {
1003                 if (ctx->options & E2F_OPT_READONLY) {
1004                         printf(_("Warning: skipping journal recovery "
1005                                  "because doing a read-only filesystem "
1006                                  "check.\n"));
1007                         io_channel_flush(ctx->fs->io);
1008                 } else {
1009                         if (ctx->flags & E2F_FLAG_RESTARTED) {
1010                                 /*
1011                                  * Whoops, we attempted to run the
1012                                  * journal twice.  This should never
1013                                  * happen, unless the hardware or
1014                                  * device driver is being bogus.
1015                                  */
1016                                 com_err(ctx->program_name, 0,
1017                                         _("unable to set superblock flags on %s\n"), ctx->device_name);
1018                                 fatal_error(ctx, 0);
1019                         }
1020                         retval = e2fsck_run_ext3_journal(ctx);
1021                         if (retval) {
1022                                 com_err(ctx->program_name, retval,
1023                                 _("while recovering ext3 journal of %s"),
1024                                         ctx->device_name);
1025                                 fatal_error(ctx, 0);
1026                         }
1027                         ext2fs_close(ctx->fs);
1028                         ctx->fs = 0;
1029                         ctx->flags |= E2F_FLAG_RESTARTED;
1030                         goto restart;
1031                 }
1032         }
1033
1034         /*
1035          * Check for compatibility with the feature sets.  We need to
1036          * be more stringent than ext2fs_open().
1037          */
1038         if ((sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) ||
1039             (sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP)) {
1040                 com_err(ctx->program_name, EXT2_ET_UNSUPP_FEATURE,
1041                         "(%s)", ctx->device_name);
1042                 goto get_newer;
1043         }
1044         if (sb->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) {
1045                 com_err(ctx->program_name, EXT2_ET_RO_UNSUPP_FEATURE,
1046                         "(%s)", ctx->device_name);
1047                 goto get_newer;
1048         }
1049 #ifdef ENABLE_COMPRESSION
1050         if (sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_COMPRESSION)
1051                 com_err(ctx->program_name, 0,
1052                         _("Warning: compression support is experimental.\n"));
1053 #endif
1054 #ifndef ENABLE_HTREE
1055         if (sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) {
1056                 com_err(ctx->program_name, 0,
1057                         _("E2fsck not compiled with HTREE support,\n\t"
1058                           "but filesystem %s has HTREE directories.\n"),
1059                         ctx->device_name);
1060                 goto get_newer;
1061         }
1062 #endif
1063
1064         /*
1065          * If the user specified a specific superblock, presumably the
1066          * master superblock has been trashed.  So we mark the
1067          * superblock as dirty, so it can be written out.
1068          */
1069         if (ctx->superblock &&
1070             !(ctx->options & E2F_OPT_READONLY))
1071                 ext2fs_mark_super_dirty(fs);
1072
1073         /*
1074          * We only update the master superblock because (a) paranoia;
1075          * we don't want to corrupt the backup superblocks, and (b) we
1076          * don't need to update the mount count and last checked
1077          * fields in the backup superblock (the kernel doesn't
1078          * update the backup superblocks anyway).
1079          */
1080         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
1081
1082         ehandler_init(fs->io);
1083
1084         if (ctx->superblock)
1085                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
1086         ext2fs_mark_valid(fs);
1087         check_super_block(ctx);
1088         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1089                 fatal_error(ctx, 0);
1090         check_if_skip(ctx);
1091         if (bad_blocks_file)
1092                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
1093         else if (cflag)
1094                 read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
1095         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1096                 fatal_error(ctx, 0);
1097 #ifdef ENABLE_SWAPFS
1098         if (normalize_swapfs) {
1099                 if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ==
1100                     ext2fs_native_flag()) {
1101                         fprintf(stderr, _("%s: Filesystem byte order "
1102                                 "already normalized.\n"), ctx->device_name);
1103                         fatal_error(ctx, 0);
1104                 }
1105         }
1106         if (swapfs) {
1107                 swap_filesys(ctx);
1108                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1109                         fatal_error(ctx, 0);
1110         }
1111 #endif
1112
1113         /*
1114          * Mark the system as valid, 'til proven otherwise
1115          */
1116         ext2fs_mark_valid(fs);
1117
1118         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
1119         if (retval) {
1120                 com_err(ctx->program_name, retval,
1121                         _("while reading bad blocks inode"));
1122                 preenhalt(ctx);
1123                 printf(_("This doesn't bode well,"
1124                          " but we'll try to go on...\n"));
1125         }
1126
1127         run_result = e2fsck_run(ctx);
1128         e2fsck_clear_progbar(ctx);
1129         if (run_result == E2F_FLAG_RESTART) {
1130                 printf(_("Restarting e2fsck from the beginning...\n"));
1131                 retval = e2fsck_reset_context(ctx);
1132                 if (retval) {
1133                         com_err(ctx->program_name, retval,
1134                                 _("while resetting context"));
1135                         fatal_error(ctx, 0);
1136                 }
1137                 ext2fs_close(fs);
1138                 goto restart;
1139         }
1140         if (run_result & E2F_FLAG_CANCEL) {
1141                 printf(_("%s: e2fsck canceled.\n"), ctx->device_name ?
1142                        ctx->device_name : ctx->filesystem_name);
1143                 exit_value |= FSCK_CANCELED;
1144         }
1145         if (run_result & E2F_FLAG_ABORT)
1146                 fatal_error(ctx, _("aborted"));
1147
1148 #ifdef MTRACE
1149         mtrace_print("Cleanup");
1150 #endif
1151         if (ext2fs_test_changed(fs)) {
1152                 exit_value |= FSCK_NONDESTRUCT;
1153                 if (!(ctx->options & E2F_OPT_PREEN))
1154                     printf(_("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
1155                                ctx->device_name);
1156                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
1157                         printf(_("%s: ***** REBOOT LINUX *****\n"),
1158                                ctx->device_name);
1159                         exit_value |= FSCK_REBOOT;
1160                 }
1161         }
1162         if (!ext2fs_test_valid(fs) ||
1163             ((exit_value & FSCK_CANCELED) &&
1164              (sb->s_state & EXT2_ERROR_FS))) {
1165                 printf(_("\n%s: ********** WARNING: Filesystem still has "
1166                          "errors **********\n\n"), ctx->device_name);
1167                 exit_value |= FSCK_UNCORRECTED;
1168                 exit_value &= ~FSCK_NONDESTRUCT;
1169         }
1170         if (exit_value & FSCK_CANCELED) {
1171                 int     allow_cancellation;
1172
1173                 profile_get_boolean(ctx->profile, "options",
1174                                     "allow_cancellation", 0, 0,
1175                                     &allow_cancellation);
1176                 exit_value &= ~FSCK_NONDESTRUCT;
1177                 if (allow_cancellation && ext2fs_test_valid(fs) &&
1178                     (sb->s_state & EXT2_VALID_FS) &&
1179                     !(sb->s_state & EXT2_ERROR_FS))
1180                         exit_value = 0;
1181         } else {
1182                 show_stats(ctx);
1183                 if (!(ctx->options & E2F_OPT_READONLY)) {
1184                         if (ext2fs_test_valid(fs)) {
1185                                 if (!(sb->s_state & EXT2_VALID_FS))
1186                                         exit_value |= FSCK_NONDESTRUCT;
1187                                 sb->s_state = EXT2_VALID_FS;
1188                         } else
1189                                 sb->s_state &= ~EXT2_VALID_FS;
1190                         sb->s_mnt_count = 0;
1191                         sb->s_lastcheck = ctx->now;
1192                         ext2fs_mark_super_dirty(fs);
1193                 }
1194         }
1195
1196         e2fsck_write_bitmaps(ctx);
1197
1198         ext2fs_close(fs);
1199         ctx->fs = NULL;
1200         free(ctx->filesystem_name);
1201         free(ctx->journal_name);
1202
1203 #ifdef RESOURCE_TRACK
1204         if (ctx->options & E2F_OPT_TIME)
1205                 print_resource_track(NULL, &ctx->global_rtrack);
1206 #endif
1207         e2fsck_free_context(ctx);
1208         return exit_value;
1209 }