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 #include <sys/ioctl.h>
  37 #include <malloc.h>
  38
  39 #include "et/com_err.h"
  40 #include "e2fsck.h"
  41 #include "problem.h"
  42 #include "../version.h"
  43
  44 /* Command line options */
  45 static int swapfs = 0;
  46 static int normalize_swapfs = 0;
  47 static int cflag = 0;           /* check disk */
  48 static int show_version_only = 0;
  49 static int verbose = 0;
  50
  51 static int replace_bad_blocks = 0;
  52 static char *bad_blocks_file = 0;
  53
  54 e2fsck_t e2fsck_global_ctx;     /* Try your very best not to use this! */
  55
  56 #ifdef CONFIG_JBD_DEBUG         /* Enabled by configure --enable-jfs-debug */
  57 int journal_enable_debug = -1;
  58 #endif
  59
  60 static void usage(e2fsck_t ctx)
  61 {
  62         fprintf(stderr,
  63                 _("Usage: %s [-panyrcdfvstDFSV] [-b superblock] [-B blocksize]\n"
  64                 "\t\t[-I inode_buffer_blocks] [-P process_inode_size]\n"
  65                 "\t\t[-l|-L bad_blocks_file] [-C fd] [-j ext-journal]\n"
  66                 "\t\t[-E extended-options] device\n"),
  67                 ctx->program_name);
  68
  69         fprintf(stderr, _("\nEmergency help:\n"
  70                 " -p                   Automatic repair (no questions)\n"
  71                 " -n                   Make no changes to the filesystem\n"
  72                 " -y                   Assume \"yes\" to all questions\n"
  73                 " -c                   Check for bad blocks\n"
  74                 " -f                   Force checking even if filesystem is marked clean\n"));
  75         fprintf(stderr, _(""
  76                 " -v                   Be verbose\n"
  77                 " -b superblock        Use alternative superblock\n"
  78                 " -B blocksize         Force blocksize when looking for superblock\n"
  79                 " -j external-journal  Set location of the external journal\n"
  80                 " -l bad_blocks_file   Add to badblocks list\n"
  81                 " -L bad_blocks_file   Set badblocks list\n"
  82                 ));
  83
  84         exit(FSCK_USAGE);
  85 }
  86
  87 static void show_stats(e2fsck_t ctx)
  88 {
  89         ext2_filsys fs = ctx->fs;
  90         int inodes, inodes_used, blocks, blocks_used;
  91         int dir_links;
  92         int num_files, num_links;
  93         int frag_percent;
  94
  95         dir_links = 2 * ctx->fs_directory_count - 1;
  96         num_files = ctx->fs_total_count - dir_links;
  97         num_links = ctx->fs_links_count - dir_links;
  98         inodes = fs->super->s_inodes_count;
  99         inodes_used = (fs->super->s_inodes_count -
 100                        fs->super->s_free_inodes_count);
 101         blocks = fs->super->s_blocks_count;
 102         blocks_used = (fs->super->s_blocks_count -
 103                        fs->super->s_free_blocks_count);
 104
 105         frag_percent = (10000 * ctx->fs_fragmented) / inodes_used;
 106         frag_percent = (frag_percent + 5) / 10;
 107
 108         if (!verbose) {
 109                 printf(_("%s: %d/%d files (%0d.%d%% non-contiguous), %d/%d blocks\n"),
 110                        ctx->device_name, inodes_used, inodes,
 111                        frag_percent / 10, frag_percent % 10,
 112                        blocks_used, blocks);
 113                 return;
 114         }
 115         /*
 116          * This is a bit ugly. But I think there will nearly always be more
 117          * than one "thing" to report about, so I won't try writing complex
 118          * code to handle one/two/many forms of all words.
 119          * Some languages (Italian, at least) never uses the plural form
 120          * of foreign words, so in real life this could not be a problem.
 121          * md@linux.it - 2000-1-15
 122          */
 123 #ifdef ENABLE_NLS
 124         printf (_("\n%8d inodes used (%d%%)\n"), inodes_used,
 125                 100 * inodes_used / inodes);
 126         printf (_("%8d non-contiguous inodes (%0d.%d%%)\n"),
 127                 ctx->fs_fragmented, frag_percent / 10, frag_percent % 10);
 128         printf (_("         # of inodes with ind/dind/tind blocks: %d/%d/%d\n"),
 129                 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
 130         printf (_("%8d blocks used (%d%%)\n"
 131                 "%8d bad blocks\n"), blocks_used,
 132                 (int) ((long long) 100 * blocks_used / blocks),
 133                 ctx->fs_badblocks_count);
 134         printf(_("%8d large files\n"), ctx->large_files);
 135         printf (_("\n%8d regular files\n"
 136                 "%8d directories\n"
 137                 "%8d character device files\n"
 138                 "%8d block device files\n"
 139                 "%8d fifos\n"
 140                 "%8d links\n"
 141                 "%8d symbolic links (%d fast symbolic links)\n"
 142                 "%8d sockets\n"
 143                 "--------\n"
 144                 "%8d files\n"),
 145                 ctx->fs_regular_count,
 146                 ctx->fs_directory_count,
 147                 ctx->fs_chardev_count,
 148                 ctx->fs_blockdev_count,
 149                 ctx->fs_fifo_count,
 150                 ctx->fs_links_count - dir_links,
 151                 ctx->fs_symlinks_count,
 152                 ctx->fs_fast_symlinks_count,
 153                 ctx->fs_sockets_count,
 154                 ctx->fs_total_count - dir_links);
 155 #else
 156         printf ("\n%8d inode%s used (%d%%)\n", inodes_used,
 157                 (inodes_used != 1) ? "s" : "",
 158                 100 * inodes_used / inodes);
 159         printf ("%8d non-contiguous inodes (%0d.%d%%)\n",
 160                 ctx->fs_fragmented, frag_percent / 10, frag_percent % 10);
 161         printf ("         # of inodes with ind/dind/tind blocks: %d/%d/%d\n",
 162                 ctx->fs_ind_count, ctx->fs_dind_count, ctx->fs_tind_count);
 163         printf ("%8d block%s used (%d%%)\n"
 164                 "%8d bad block%s\n", blocks_used,
 165                 (blocks_used != 1) ? "s" : "",
 166                 100 * blocks_used / blocks, ctx->fs_badblocks_count,
 167                 ctx->fs_badblocks_count != 1 ? "s" : "");
 168         printf(_("%8d large file%s\n"), ctx->large_files,
 169                (ctx->large_files != 1) ? "s" : "");
 170         printf ("\n%8d regular file%s\n"
 171                 "%8d director%s\n"
 172                 "%8d character device file%s\n"
 173                 "%8d block device file%s\n"
 174                 "%8d fifo%s\n"
 175                 "%8d link%s\n"
 176                 "%8d symbolic link%s (%d fast symbolic link%s)\n"
 177                 "%8d socket%s\n"
 178                 "--------\n"
 179                 "%8d file%s\n",
 180                 ctx->fs_regular_count,
 181                 (ctx->fs_regular_count != 1) ? "s" : "",
 182                 ctx->fs_directory_count,
 183                 (ctx->fs_directory_count != 1) ? "ies" : "y",
 184                 ctx->fs_chardev_count,
 185                 (ctx->fs_chardev_count != 1) ? "s" : "",
 186                 ctx->fs_blockdev_count,
 187                 (ctx->fs_blockdev_count != 1) ? "s" : "",
 188                 ctx->fs_fifo_count,
 189                 (ctx->fs_fifo_count != 1) ? "s" : "",
 190                 ctx->fs_links_count - dir_links,
 191                 ((ctx->fs_links_count - dir_links) != 1) ? "s" : "",
 192                 ctx->fs_symlinks_count,
 193                 (ctx->fs_symlinks_count != 1) ? "s" : "",
 194                 ctx->fs_fast_symlinks_count,
 195                 (ctx->fs_fast_symlinks_count != 1) ? "s" : "",
 196                 ctx->fs_sockets_count, (ctx->fs_sockets_count != 1) ? "s" : "",
 197                 ctx->fs_total_count - dir_links,
 198                 ((ctx->fs_total_count - dir_links) != 1) ? "s" : "");
 199 #endif
 200 }
 201
 202 static void check_mount(e2fsck_t ctx)
 203 {
 204         errcode_t       retval;
 205         int             cont;
 206
 207         retval = ext2fs_check_if_mounted(ctx->filesystem_name,
 208                                          &ctx->mount_flags);
 209         if (retval) {
 210                 com_err("ext2fs_check_if_mount", retval,
 211                         _("while determining whether %s is mounted."),
 212                         ctx->filesystem_name);
 213                 return;
 214         }
 215
 216         /*
 217          * If the filesystem isn't mounted, or it's the root filesystem
 218          * and it's mounted read-only, then everything's fine.
 219          */
 220         if ((!(ctx->mount_flags & EXT2_MF_MOUNTED)) ||
 221             ((ctx->mount_flags & EXT2_MF_ISROOT) &&
 222              (ctx->mount_flags & EXT2_MF_READONLY)))
 223                 return;
 224
 225         if (ctx->options & E2F_OPT_READONLY) {
 226                 printf(_("Warning!  %s is mounted.\n"), ctx->filesystem_name);
 227                 return;
 228         }
 229
 230         printf(_("%s is mounted.  "), ctx->filesystem_name);
 231         if (!isatty(0) || !isatty(1))
 232                 fatal_error(ctx, _("Cannot continue, aborting.\n\n"));
 233         printf(_("\n\n\007\007\007\007WARNING!!!  "
 234                "Running e2fsck on a mounted filesystem may cause\n"
 235                "SEVERE filesystem damage.\007\007\007\n\n"));
 236         cont = ask_yn(_("Do you really want to continue"), -1);
 237         if (!cont) {
 238                 printf (_("check aborted.\n"));
 239                 exit (0);
 240         }
 241         return;
 242 }
 243
 244 /*
 245  * This routine checks to see if a filesystem can be skipped; if so,
 246  * it will exit with E2FSCK_OK.  Under some conditions it will print a
 247  * message explaining why a check is being forced.
 248  */
 249 static void check_if_skip(e2fsck_t ctx)
 250 {
 251         ext2_filsys fs = ctx->fs;
 252         const char *reason = NULL;
 253         unsigned int reason_arg = 0;
 254
 255         if ((ctx->options & E2F_OPT_FORCE) || bad_blocks_file ||
 256             cflag || swapfs)
 257                 return;
 258
 259         if (fs->super->s_state & EXT2_ERROR_FS)
 260                 reason = _(" contains a file system with errors");
 261         else if ((fs->super->s_state & EXT2_VALID_FS) == 0)
 262                 reason = _(" was not cleanly unmounted");
 263         else if ((fs->super->s_max_mnt_count > 0) &&
 264                  (fs->super->s_mnt_count >=
 265                   (unsigned) fs->super->s_max_mnt_count)) {
 266                 reason = _(" has been mounted %u times without being checked");
 267                 reason_arg = fs->super->s_mnt_count;
 268         } else if (fs->super->s_checkinterval &&
 269                  time(0) >= (fs->super->s_lastcheck +
 270                              fs->super->s_checkinterval)) {
 271                 reason = _(" has gone %u days without being checked");
 272                 reason_arg = (time(0) - fs->super->s_lastcheck)/(3600*24);
 273         }
 274         if (reason) {
 275                 fputs(ctx->device_name, stdout);
 276                 printf(reason, reason_arg);
 277                 fputs(_(", check forced.\n"), stdout);
 278                 return;
 279         }
 280         printf(_("%s: clean, %d/%d files, %d/%d blocks\n"), ctx->device_name,
 281                fs->super->s_inodes_count - fs->super->s_free_inodes_count,
 282                fs->super->s_inodes_count,
 283                fs->super->s_blocks_count - fs->super->s_free_blocks_count,
 284                fs->super->s_blocks_count);
 285         ext2fs_close(fs);
 286         ctx->fs = NULL;
 287         e2fsck_free_context(ctx);
 288         exit(FSCK_OK);
 289 }
 290
 291 /*
 292  * For completion notice
 293  */
 294 struct percent_tbl {
 295         int     max_pass;
 296         int     table[32];
 297 };
 298 struct percent_tbl e2fsck_tbl = {
 299         5, { 0, 70, 90, 92,  95, 100 }
 300 };
 301 static char bar[] =
 302         "==============================================================="
 303         "===============================================================";
 304 static char spaces[] =
 305         "                                                               "
 306         "                                                               ";
 307
 308 static float calc_percent(struct percent_tbl *tbl, int pass, int curr,
 309                           int max)
 310 {
 311         float   percent;
 312
 313         if (pass <= 0)
 314                 return 0.0;
 315         if (pass > tbl->max_pass || max == 0)
 316                 return 100.0;
 317         percent = ((float) curr) / ((float) max);
 318         return ((percent * (tbl->table[pass] - tbl->table[pass-1]))
 319                 + tbl->table[pass-1]);
 320 }
 321
 322 extern void e2fsck_clear_progbar(e2fsck_t ctx)
 323 {
 324         if (!(ctx->flags & E2F_FLAG_PROG_BAR))
 325                 return;
 326
 327         printf("%s\r", spaces + (sizeof(spaces) - 80));
 328         ctx->flags &= ~E2F_FLAG_PROG_BAR;
 329 }
 330
 331 static int e2fsck_update_progress(e2fsck_t ctx, int pass,
 332                                   unsigned long cur, unsigned long max)
 333 {
 334         static const char spinner[] = "\\|/-";
 335         char buf[80];
 336         int     i;
 337         float percent;
 338         int     tick;
 339         struct timeval  tv;
 340         static int dpywidth = 0;
 341
 342         if (pass == 0)
 343                 return 0;
 344
 345         if (ctx->progress_fd) {
 346                 sprintf(buf, "%d %lu %lu\n", pass, cur, max);
 347                 write(ctx->progress_fd, buf, strlen(buf));
 348         } else {
 349                 if (ctx->flags & E2F_FLAG_PROG_SUPPRESS)
 350                         return 0;
 351                 if (dpywidth == 0) {
 352                         dpywidth = 66 - strlen(ctx->device_name);
 353                         dpywidth = 8 * (dpywidth / 8);
 354                 }
 355                 /*
 356                  * Calculate the new progress position.  If the
 357                  * percentage hasn't changed, then we skip out right
 358                  * away.
 359                  */
 360                 percent = calc_percent(&e2fsck_tbl, pass, cur, max);
 361                 if (ctx->progress_last_percent == (int) 10 * percent)
 362                         return 0;
 363                 ctx->progress_last_percent = (int) 10 * percent;
 364
 365                 /*
 366                  * If we've already updated the spinner once within
 367                  * the last 1/8th of a second, no point doing it
 368                  * again.
 369                  */
 370                 gettimeofday(&tv, NULL);
 371                 tick = (tv.tv_sec << 3) + (tv.tv_usec / (1000000 / 8));
 372                 if ((tick == ctx->progress_last_time) &&
 373                     (cur != max) && (cur != 0))
 374                         return 0;
 375                 ctx->progress_last_time = tick;
 376
 377                 /*
 378                  * Advance the spinner, and note that the progress bar
 379                  * will be on the screen
 380                  */
 381                 ctx->progress_pos = (ctx->progress_pos+1) & 3;
 382                 ctx->flags |= E2F_FLAG_PROG_BAR;
 383
 384                 i = ((percent * dpywidth) + 50) / 100;
 385                 printf("%s: |%s%s", ctx->device_name,
 386                        bar + (sizeof(bar) - (i+1)),
 387                        spaces + (sizeof(spaces) - (dpywidth - i + 1)));
 388                 if (percent == 100.0)
 389                         fputc('|', stdout);
 390                 else
 391                         fputc(spinner[ctx->progress_pos & 3], stdout);
 392                 printf(" %4.1f%%   \r", percent);
 393                 if (percent == 100.0)
 394                         e2fsck_clear_progbar(ctx);
 395                 fflush(stdout);
 396         }
 397         return 0;
 398 }
 399
 400 #define PATH_SET "PATH=/sbin"
 401
 402 static void reserve_stdio_fds(void)
 403 {
 404         int     fd;
 405
 406         while (1) {
 407                 fd = open("/dev/null", O_RDWR);
 408                 if (fd > 2)
 409                         break;
 410                 if (fd < 0) {
 411                         fprintf(stderr, _("ERROR: Couldn't open "
 412                                 "/dev/null (%s)\n"),
 413                                 strerror(errno));
 414                         break;
 415                 }
 416         }
 417         close(fd);
 418 }
 419
 420 #ifdef HAVE_SIGNAL_H
 421 static void signal_progress_on(int sig)
 422 {
 423         e2fsck_t ctx = e2fsck_global_ctx;
 424
 425         if (!ctx)
 426                 return;
 427
 428         ctx->progress = e2fsck_update_progress;
 429         ctx->progress_fd = 0;
 430 }
 431
 432 static void signal_progress_off(int sig)
 433 {
 434         e2fsck_t ctx = e2fsck_global_ctx;
 435
 436         if (!ctx)
 437                 return;
 438
 439         e2fsck_clear_progbar(ctx);
 440         ctx->progress = 0;
 441 }
 442
 443 static void signal_cancel(int sig)
 444 {
 445         e2fsck_t ctx = e2fsck_global_ctx;
 446
 447         if (!ctx)
 448                 exit(FSCK_CANCELED);
 449
 450         ctx->flags |= E2F_FLAG_CANCEL;
 451 }
 452 #endif
 453
 454 static void parse_extended_opts(e2fsck_t ctx, const char *opts)
 455 {
 456         char    *buf, *token, *next, *p, *arg;
 457         int     len, ea_ver;
 458         int     extended_usage = 0;
 459
 460         len = strlen(opts);
 461         buf = malloc(len+1);
 462         if (!buf) {
 463                 fprintf(stderr, _("Couldn't allocate memory to parse "
 464                         "extended options!\n"));
 465                 exit(1);
 466         }
 467         strcpy(buf, opts);
 468         for (token = buf; token && *token; token = next) {
 469                 p = strchr(token, ',');
 470                 next = 0;
 471                 if (p) {
 472                         *p = 0;
 473                         next = p+1;
 474                 }
 475                 arg = strchr(token, '=');
 476                 if (arg) {
 477                         *arg = 0;
 478                         arg++;
 479                 }
 480                 if (strcmp(token, "ea_ver") == 0) {
 481                         if (!arg) {
 482                                 extended_usage++;
 483                                 continue;
 484                         }
 485                         ea_ver = strtoul(arg, &p, 0);
 486                         if (*p ||
 487                             ((ea_ver != 1) && (ea_ver != 2))) {
 488                                 fprintf(stderr,
 489                                         _("Invalid EA version.\n"));
 490                                 extended_usage++;
 491                                 continue;
 492                         }
 493                         ctx->ext_attr_ver = ea_ver;
 494                 } else
 495                         extended_usage++;
 496         }
 497         if (extended_usage) {
 498                 fprintf(stderr, _("Extended options are separated by commas, "
 499                         "and may take an argument which\n"
 500                         "is set off by an equals ('=') sign.  "
 501                         "Valid raid options are:\n"
 502                         "\tea_ver=<ea_version (1 or 2)\n\n"));
 503                 exit(1);
 504         }
 505 }
 506
 507
 508 static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
 509 {
 510         int             flush = 0;
 511         int             c, fd;
 512 #ifdef MTRACE
 513         extern void     *mallwatch;
 514 #endif
 515         e2fsck_t        ctx;
 516         errcode_t       retval;
 517 #ifdef HAVE_SIGNAL_H
 518         struct sigaction        sa;
 519 #endif
 520         char            *extended_opts = 0;
 521
 522         retval = e2fsck_allocate_context(&ctx);
 523         if (retval)
 524                 return retval;
 525
 526         *ret_ctx = ctx;
 527
 528         setbuf(stdout, NULL);
 529         setbuf(stderr, NULL);
 530         initialize_ext2_error_table();
 531
 532         if (argc && *argv)
 533                 ctx->program_name = *argv;
 534         else
 535                 ctx->program_name = "e2fsck";
 536         while ((c = getopt (argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsD")) != EOF)
 537                 switch (c) {
 538                 case 'C':
 539                         ctx->progress = e2fsck_update_progress;
 540                         ctx->progress_fd = atoi(optarg);
 541                         if (!ctx->progress_fd)
 542                                 break;
 543                         /* Validate the file descriptor to avoid disasters */
 544                         fd = dup(ctx->progress_fd);
 545                         if (fd < 0) {
 546                                 fprintf(stderr,
 547                                 _("Error validating file descriptor %d: %s\n"),
 548                                         ctx->progress_fd,
 549                                         error_message(errno));
 550                                 fatal_error(ctx,
 551                         _("Invalid completion information file descriptor"));
 552                         } else
 553                                 close(fd);
 554                         break;
 555                 case 'D':
 556                         ctx->options |= E2F_OPT_COMPRESS_DIRS;
 557                         break;
 558                 case 'E':
 559                         extended_opts = optarg;
 560                         break;
 561                 case 'p':
 562                 case 'a':
 563                         ctx->options |= E2F_OPT_PREEN;
 564                         ctx->options &= ~(E2F_OPT_YES|E2F_OPT_NO);
 565                         break;
 566                 case 'n':
 567                         ctx->options |= E2F_OPT_NO;
 568                         ctx->options &= ~(E2F_OPT_YES|E2F_OPT_PREEN);
 569                         break;
 570                 case 'y':
 571                         ctx->options |= E2F_OPT_YES;
 572                         ctx->options &= ~(E2F_OPT_PREEN|E2F_OPT_NO);
 573                         break;
 574                 case 't':
 575 #ifdef RESOURCE_TRACK
 576                         if (ctx->options & E2F_OPT_TIME)
 577                                 ctx->options |= E2F_OPT_TIME2;
 578                         else
 579                                 ctx->options |= E2F_OPT_TIME;
 580 #else
 581                         fprintf(stderr, _("The -t option is not "
 582                                 "supported on this version of e2fsck.\n"));
 583 #endif
 584                         break;
 585                 case 'c':
 586                         if (cflag++)
 587                                 ctx->options |= E2F_OPT_WRITECHECK;
 588                         ctx->options |= E2F_OPT_CHECKBLOCKS;
 589                         break;
 590                 case 'r':
 591                         /* What we do by default, anyway! */
 592                         break;
 593                 case 'b':
 594                         ctx->use_superblock = atoi(optarg);
 595                         ctx->flags |= E2F_FLAG_SB_SPECIFIED;
 596                         break;
 597                 case 'B':
 598                         ctx->blocksize = atoi(optarg);
 599                         break;
 600                 case 'I':
 601                         ctx->inode_buffer_blocks = atoi(optarg);
 602                         break;
 603                 case 'j':
 604                         ctx->journal_name = optarg;
 605                         break;
 606                 case 'P':
 607                         ctx->process_inode_size = atoi(optarg);
 608                         break;
 609                 case 'L':
 610                         replace_bad_blocks++;
 611                 case 'l':
 612                         bad_blocks_file = (char *) malloc(strlen(optarg)+1);
 613                         if (!bad_blocks_file)
 614                                 fatal_error(ctx,
 615                                             "Couldn't malloc bad_blocks_file");
 616                         strcpy(bad_blocks_file, optarg);
 617                         break;
 618                 case 'd':
 619                         ctx->options |= E2F_OPT_DEBUG;
 620                         break;
 621                 case 'f':
 622                         ctx->options |= E2F_OPT_FORCE;
 623                         break;
 624                 case 'F':
 625                         flush = 1;
 626                         break;
 627                 case 'v':
 628                         verbose = 1;
 629                         break;
 630                 case 'V':
 631                         show_version_only = 1;
 632                         break;
 633 #ifdef MTRACE
 634                 case 'M':
 635                         mallwatch = (void *) strtol(optarg, NULL, 0);
 636                         break;
 637 #endif
 638                 case 'N':
 639                         ctx->device_name = optarg;
 640                         break;
 641 #ifdef ENABLE_SWAPFS
 642                 case 's':
 643                         normalize_swapfs = 1;
 644                 case 'S':
 645                         swapfs = 1;
 646                         break;
 647 #else
 648                 case 's':
 649                 case 'S':
 650                         fprintf(stderr, _("Byte-swapping filesystems "
 651                                           "not compiled in this version "
 652                                           "of e2fsck\n"));
 653                         exit(1);
 654 #endif
 655                 default:
 656                         usage(ctx);
 657                 }
 658         if (show_version_only)
 659                 return 0;
 660         if (optind != argc - 1)
 661                 usage(ctx);
 662         if ((ctx->options & E2F_OPT_NO) && !bad_blocks_file &&
 663             !cflag && !swapfs && !(ctx->options & E2F_OPT_COMPRESS_DIRS))
 664                 ctx->options |= E2F_OPT_READONLY;
 665         ctx->filesystem_name = argv[optind];
 666         if (extended_opts)
 667                 parse_extended_opts(ctx, extended_opts);
 668
 669         if (flush) {
 670                 fd = open(ctx->filesystem_name, O_RDONLY, 0);
 671                 if (fd < 0) {
 672                         com_err("open", errno,
 673                                 _("while opening %s for flushing"),
 674                                 ctx->filesystem_name);
 675                         fatal_error(ctx, 0);
 676                 }
 677                 if ((retval = ext2fs_sync_device(fd, 1))) {
 678                         com_err("ext2fs_sync_device", retval,
 679                                 _("while trying to flush %s"),
 680                                 ctx->filesystem_name);
 681                         fatal_error(ctx, 0);
 682                 }
 683                 close(fd);
 684         }
 685 #ifdef ENABLE_SWAPFS
 686         if (swapfs) {
 687                 if (cflag || bad_blocks_file) {
 688                         fprintf(stderr, _("Incompatible options not "
 689                                           "allowed when byte-swapping.\n"));
 690                         exit(FSCK_USAGE);
 691                 }
 692         }
 693 #endif
 694         if (cflag && bad_blocks_file) {
 695                 fprintf(stderr, _("The -c and the -l/-L options may "
 696                                   "not be both used at the same time.\n"));
 697                 exit(FSCK_USAGE);
 698         }
 699 #ifdef HAVE_SIGNAL_H
 700         /*
 701          * Set up signal action
 702          */
 703         memset(&sa, 0, sizeof(struct sigaction));
 704         sa.sa_handler = signal_cancel;
 705         sigaction(SIGINT, &sa, 0);
 706         sigaction(SIGTERM, &sa, 0);
 707 #ifdef SA_RESTART
 708         sa.sa_flags = SA_RESTART;
 709 #endif
 710         e2fsck_global_ctx = ctx;
 711         sa.sa_handler = signal_progress_on;
 712         sigaction(SIGUSR1, &sa, 0);
 713         sa.sa_handler = signal_progress_off;
 714         sigaction(SIGUSR2, &sa, 0);
 715 #endif
 716
 717         /* Update our PATH to include /sbin if we need to run badblocks  */
 718         if (cflag) {
 719                 char *oldpath = getenv("PATH");
 720                 if (oldpath) {
 721                         char *newpath;
 722
 723                         newpath = (char *) malloc(sizeof (PATH_SET) + 1 +
 724                                                   strlen (oldpath));
 725                         if (!newpath)
 726                                 fatal_error(ctx, "Couldn't malloc() newpath");
 727                         strcpy (newpath, PATH_SET);
 728                         strcat (newpath, ":");
 729                         strcat (newpath, oldpath);
 730                         putenv (newpath);
 731                 } else
 732                         putenv (PATH_SET);
 733         }
 734 #ifdef CONFIG_JBD_DEBUG
 735         if (getenv("E2FSCK_JBD_DEBUG"))
 736                 journal_enable_debug = atoi(getenv("E2FSCK_JBD_DEBUG"));
 737 #endif
 738         return 0;
 739 }
 740
 741 static const char *my_ver_string = E2FSPROGS_VERSION;
 742 static const char *my_ver_date = E2FSPROGS_DATE;
 743
 744 int main (int argc, char *argv[])
 745 {
 746         errcode_t       retval = 0;
 747         int             exit_value = FSCK_OK;
 748         ext2_filsys     fs = 0;
 749         io_manager      io_ptr;
 750         struct ext2_super_block *sb;
 751         const char      *lib_ver_date;
 752         int             my_ver, lib_ver;
 753         e2fsck_t        ctx;
 754         struct problem_context pctx;
 755         int flags, run_result;
 756
 757         clear_problem_context(&pctx);
 758 #ifdef MTRACE
 759         mtrace();
 760 #endif
 761 #ifdef MCHECK
 762         mcheck(0);
 763 #endif
 764 #ifdef ENABLE_NLS
 765         setlocale(LC_MESSAGES, "");
 766         setlocale(LC_CTYPE, "");
 767         bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
 768         textdomain(NLS_CAT_NAME);
 769 #endif
 770         my_ver = ext2fs_parse_version_string(my_ver_string);
 771         lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
 772         if (my_ver > lib_ver) {
 773                 fprintf( stderr, _("Error: ext2fs library version "
 774                         "out of date!\n"));
 775                 show_version_only++;
 776         }
 777
 778         retval = PRS(argc, argv, &ctx);
 779         if (retval) {
 780                 com_err("e2fsck", retval,
 781                         _("while trying to initialize program"));
 782                 exit(FSCK_ERROR);
 783         }
 784         reserve_stdio_fds();
 785
 786 #ifdef RESOURCE_TRACK
 787         init_resource_track(&ctx->global_rtrack);
 788 #endif
 789
 790         if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
 791                 fprintf (stderr, "e2fsck %s (%s)\n", my_ver_string,
 792                          my_ver_date);
 793
 794         if (show_version_only) {
 795                 fprintf(stderr, _("\tUsing %s, %s\n"),
 796                         error_message(EXT2_ET_BASE), lib_ver_date);
 797                 exit(FSCK_OK);
 798         }
 799
 800         check_mount(ctx);
 801
 802         if (!(ctx->options & E2F_OPT_PREEN) &&
 803             !(ctx->options & E2F_OPT_NO) &&
 804             !(ctx->options & E2F_OPT_YES)) {
 805                 if (!isatty (0) || !isatty (1))
 806                         fatal_error(ctx,
 807                                     _("need terminal for interactive repairs"));
 808         }
 809         ctx->superblock = ctx->use_superblock;
 810 restart:
 811 #if 1
 812         io_ptr = unix_io_manager;
 813 #else
 814         io_ptr = test_io_manager;
 815         test_io_backing_manager = unix_io_manager;
 816 #endif
 817         flags = 0;
 818         if ((ctx->options & E2F_OPT_READONLY) == 0)
 819                 flags |= EXT2_FLAG_RW;
 820
 821         if (ctx->superblock && ctx->blocksize) {
 822                 retval = ext2fs_open(ctx->filesystem_name, flags,
 823                                      ctx->superblock, ctx->blocksize,
 824                                      io_ptr, &fs);
 825         } else if (ctx->superblock) {
 826                 int blocksize;
 827                 for (blocksize = EXT2_MIN_BLOCK_SIZE;
 828                      blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
 829                         retval = ext2fs_open(ctx->filesystem_name, flags,
 830                                              ctx->superblock, blocksize,
 831                                              io_ptr, &fs);
 832                         if (!retval)
 833                                 break;
 834                 }
 835         } else
 836                 retval = ext2fs_open(ctx->filesystem_name, flags,
 837                                      0, 0, io_ptr, &fs);
 838         if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
 839             !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
 840             ((retval == EXT2_ET_BAD_MAGIC) ||
 841              ((retval == 0) && ext2fs_check_desc(fs)))) {
 842                 if (!fs || (fs->group_desc_count > 1)) {
 843                         printf(_("%s trying backup blocks...\n"),
 844                                retval ? _("Couldn't find ext2 superblock,") :
 845                                _("Group descriptors look bad..."));
 846                         get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
 847                         if (fs)
 848                                 ext2fs_close(fs);
 849                         goto restart;
 850                 }
 851         }
 852         if (retval) {
 853                 com_err(ctx->program_name, retval, _("while trying to open %s"),
 854                         ctx->filesystem_name);
 855                 if (retval == EXT2_ET_REV_TOO_HIGH) {
 856                         printf(_("The filesystem revision is apparently "
 857                                "too high for this version of e2fsck.\n"
 858                                "(Or the filesystem superblock "
 859                                "is corrupt)\n\n"));
 860                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
 861                 } else if (retval == EXT2_ET_SHORT_READ)
 862                         printf(_("Could this be a zero-length partition?\n"));
 863                 else if ((retval == EPERM) || (retval == EACCES))
 864                         printf(_("You must have %s access to the "
 865                                "filesystem or be root\n"),
 866                                (ctx->options & E2F_OPT_READONLY) ?
 867                                "r/o" : "r/w");
 868                 else if (retval == ENXIO)
 869                         printf(_("Possibly non-existent or swap device?\n"));
 870 #ifdef EROFS
 871                 else if (retval == EROFS)
 872                         printf(_("Disk write-protected; use the -n option "
 873                                "to do a read-only\n"
 874                                "check of the device.\n"));
 875 #endif
 876                 else
 877                         fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
 878                 fatal_error(ctx, 0);
 879         }
 880         ctx->fs = fs;
 881         fs->priv_data = ctx;
 882         sb = fs->super;
 883         if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
 884                 com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
 885                         _("while trying to open %s"),
 886                         ctx->filesystem_name);
 887         get_newer:
 888                 fatal_error(ctx, _("Get a newer version of e2fsck!"));
 889         }
 890
 891         /*
 892          * Set the device name, which is used whenever we print error
 893          * or informational messages to the user.
 894          */
 895         if (ctx->device_name == 0 &&
 896             (sb->s_volume_name[0] != 0)) {
 897                 char *cp = malloc(sizeof(sb->s_volume_name)+1);
 898                 if (cp) {
 899                         strncpy(cp, sb->s_volume_name,
 900                                 sizeof(sb->s_volume_name));
 901                         cp[sizeof(sb->s_volume_name)] = 0;
 902                         ctx->device_name = cp;
 903                 }
 904         }
 905         if (ctx->device_name == 0)
 906                 ctx->device_name = ctx->filesystem_name;
 907
 908         /*
 909          * Make sure the ext3 superblock fields are consistent.
 910          */
 911         retval = e2fsck_check_ext3_journal(ctx);
 912         if (retval) {
 913                 com_err(ctx->program_name, retval,
 914                         _("while checking ext3 journal for %s"),
 915                         ctx->device_name);
 916                 fatal_error(ctx, 0);
 917         }
 918
 919         /*
 920          * Check to see if we need to do ext3-style recovery.  If so,
 921          * do it, and then restart the fsck.
 922          */
 923         if (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) {
 924                 if (ctx->options & E2F_OPT_READONLY) {
 925                         printf(_("Warning: skipping journal recovery "
 926                                  "because doing a read-only filesystem "
 927                                  "check.\n"));
 928                         io_channel_flush(ctx->fs->io);
 929                 } else {
 930                         retval = e2fsck_run_ext3_journal(ctx);
 931                         if (retval) {
 932                                 com_err(ctx->program_name, retval,
 933                                 _("while recovering ext3 journal of %s"),
 934                                         ctx->device_name);
 935                                 fatal_error(ctx, 0);
 936                         }
 937                         ext2fs_close(ctx->fs);
 938                         ctx->fs = 0;
 939                         goto restart;
 940                 }
 941         }
 942
 943         /*
 944          * Check for compatibility with the feature sets.  We need to
 945          * be more stringent than ext2fs_open().
 946          */
 947         if ((sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) ||
 948             (sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP)) {
 949                 com_err(ctx->program_name, EXT2_ET_UNSUPP_FEATURE,
 950                         "(%s)", ctx->device_name);
 951                 goto get_newer;
 952         }
 953         if (sb->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) {
 954                 com_err(ctx->program_name, EXT2_ET_RO_UNSUPP_FEATURE,
 955                         "(%s)", ctx->device_name);
 956                 goto get_newer;
 957         }
 958 #ifdef ENABLE_COMPRESSION
 959         if (sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_COMPRESSION)
 960                 com_err(ctx->program_name, 0,
 961                         _("Warning: compression support is experimental.\n"));
 962 #endif
 963 #ifndef ENABLE_HTREE
 964         if (sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) {
 965                 com_err(ctx->program_name, 0,
 966                         _("E2fsck not compiled with HTREE support,\n\t"
 967                           "but filesystem %s has HTREE directories.\n"),
 968                         ctx->device_name);
 969                 goto get_newer;
 970         }
 971 #endif
 972
 973         /*
 974          * If the user specified a specific superblock, presumably the
 975          * master superblock has been trashed.  So we mark the
 976          * superblock as dirty, so it can be written out.
 977          */
 978         if (ctx->superblock &&
 979             !(ctx->options & E2F_OPT_READONLY))
 980                 ext2fs_mark_super_dirty(fs);
 981
 982         /*
 983          * We only update the master superblock because (a) paranoia;
 984          * we don't want to corrupt the backup superblocks, and (b) we
 985          * don't need to update the mount count and last checked
 986          * fields in the backup superblock (the kernel doesn't
 987          * update the backup superblocks anyway).
 988          */
 989         fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
 990
 991         ehandler_init(fs->io);
 992
 993         if (ctx->superblock)
 994                 set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
 995         check_super_block(ctx);
 996         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
 997                 fatal_error(ctx, 0);
 998         check_if_skip(ctx);
 999         if (bad_blocks_file)
1000                 read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
1001         else if (cflag)
1002                 test_disk(ctx);
1003         if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1004                 fatal_error(ctx, 0);
1005 #ifdef ENABLE_SWAPFS
1006         if (normalize_swapfs) {
1007                 if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ==
1008                     ext2fs_native_flag()) {
1009                         fprintf(stderr, _("%s: Filesystem byte order "
1010                                 "already normalized.\n"), ctx->device_name);
1011                         fatal_error(ctx, 0);
1012                 }
1013         }
1014         if (swapfs) {
1015                 swap_filesys(ctx);
1016                 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1017                         fatal_error(ctx, 0);
1018         }
1019 #endif
1020
1021         /*
1022          * Mark the system as valid, 'til proven otherwise
1023          */
1024         ext2fs_mark_valid(fs);
1025
1026         retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
1027         if (retval) {
1028                 com_err(ctx->program_name, retval,
1029                         _("while reading bad blocks inode"));
1030                 preenhalt(ctx);
1031                 printf(_("This doesn't bode well,"
1032                          " but we'll try to go on...\n"));
1033         }
1034
1035         run_result = e2fsck_run(ctx);
1036         e2fsck_clear_progbar(ctx);
1037         if (run_result == E2F_FLAG_RESTART) {
1038                 printf(_("Restarting e2fsck from the beginning...\n"));
1039                 retval = e2fsck_reset_context(ctx);
1040                 if (retval) {
1041                         com_err(ctx->program_name, retval,
1042                                 _("while resetting context"));
1043                         fatal_error(ctx, 0);
1044                 }
1045                 ext2fs_close(fs);
1046                 goto restart;
1047         }
1048         if (run_result & E2F_FLAG_CANCEL) {
1049                 printf(_("%s: e2fsck canceled.\n"), ctx->device_name ?
1050                        ctx->device_name : ctx->filesystem_name);
1051                 exit_value |= FSCK_CANCELED;
1052         }
1053         if (run_result & E2F_FLAG_ABORT)
1054                 fatal_error(ctx, _("aborted"));
1055
1056 #ifdef MTRACE
1057         mtrace_print("Cleanup");
1058 #endif
1059         if (ext2fs_test_changed(fs)) {
1060                 exit_value |= FSCK_NONDESTRUCT;
1061                 if (!(ctx->options & E2F_OPT_PREEN))
1062                     printf(_("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
1063                                ctx->device_name);
1064                 if (ctx->mount_flags & EXT2_MF_ISROOT) {
1065                         printf(_("%s: ***** REBOOT LINUX *****\n"),
1066                                ctx->device_name);
1067                         exit_value |= FSCK_REBOOT;
1068                 }
1069         }
1070         if (!ext2fs_test_valid(fs)) {
1071                 printf(_("\n%s: ********** WARNING: Filesystem still has "
1072                          "errors **********\n\n"), ctx->device_name);
1073                 exit_value |= FSCK_UNCORRECTED;
1074                 exit_value &= ~FSCK_NONDESTRUCT;
1075         }
1076         if (exit_value & FSCK_CANCELED)
1077                 exit_value &= ~FSCK_NONDESTRUCT;
1078         else {
1079                 show_stats(ctx);
1080                 if (!(ctx->options & E2F_OPT_READONLY)) {
1081                         if (ext2fs_test_valid(fs)) {
1082                                 if (!(sb->s_state & EXT2_VALID_FS))
1083                                         exit_value |= FSCK_NONDESTRUCT;
1084                                 sb->s_state = EXT2_VALID_FS;
1085                         } else
1086                                 sb->s_state &= ~EXT2_VALID_FS;
1087                         sb->s_mnt_count = 0;
1088                         sb->s_lastcheck = time(NULL);
1089                         ext2fs_mark_super_dirty(fs);
1090                 }
1091         }
1092
1093         e2fsck_write_bitmaps(ctx);
1094
1095         ext2fs_close(fs);
1096         ctx->fs = NULL;
1097         e2fsck_free_context(ctx);
1098
1099 #ifdef RESOURCE_TRACK
1100         if (ctx->options & E2F_OPT_TIME)
1101                 print_resource_track(NULL, &ctx->global_rtrack);
1102 #endif
1103
1104         return exit_value;
1105 }