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