release/src/router/busybox/util-linux/fsck_minix.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * fsck.c - a file system consistency checker for Linux.
   4  *
   5  * (C) 1991, 1992 Linus Torvalds.
   6  *
   7  * Licensed under GPLv2, see file LICENSE in this source tree.
   8  */
   9
  10 /*
  11  * 09.11.91  -  made the first rudimentary functions
  12  *
  13  * 10.11.91  -  updated, does checking, no repairs yet.
  14  *              Sent out to the mailing-list for testing.
  15  *
  16  * 14.11.91  -  Testing seems to have gone well. Added some
  17  *              correction-code, and changed some functions.
  18  *
  19  * 15.11.91  -  More correction code. Hopefully it notices most
  20  *              cases now, and tries to do something about them.
  21  *
  22  * 16.11.91  -  More corrections (thanks to Mika Jalava). Most
  23  *              things seem to work now. Yeah, sure.
  24  *
  25  * 19.04.92  -  Had to start over again from this old version, as a
  26  *              kernel bug ate my enhanced fsck in february.
  27  *
  28  * 28.02.93  -  added support for different directory entry sizes..
  29  *
  30  * Sat Mar  6 18:59:42 1993, faith@cs.unc.edu: Output namelen with
  31  *                           superblock information
  32  *
  33  * Sat Oct  9 11:17:11 1993, faith@cs.unc.edu: make exit status conform
  34  *                           to that required by fsutil
  35  *
  36  * Mon Jan  3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu)
  37  *                            Added support for file system valid flag.  Also
  38  *                            added program_version variable and output of
  39  *                            program name and version number when program
  40  *                            is executed.
  41  *
  42  * 30.10.94  - added support for v2 filesystem
  43  *             (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
  44  *
  45  * 10.12.94  - added test to prevent checking of mounted fs adapted
  46  *             from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck
  47  *             program.  (Daniel Quinlan, quinlan@yggdrasil.com)
  48  *
  49  * 01.07.96  - Fixed the v2 fs stuff to use the right #defines and such
  50  *             for modern libcs (janl@math.uio.no, Nicolai Langfeldt)
  51  *
  52  * 02.07.96  - Added C bit fiddling routines from rmk@ecs.soton.ac.uk
  53  *             (Russell King).  He made them for ARM.  It would seem
  54  *             that the ARM is powerful enough to do this in C whereas
  55  *             i386 and m64k must use assembly to get it fast >:-)
  56  *             This should make minix fsck system-independent.
  57  *             (janl@math.uio.no, Nicolai Langfeldt)
  58  *
  59  * 04.11.96  - Added minor fixes from Andreas Schwab to avoid compiler
  60  *             warnings.  Added mc68k bitops from
  61  *             Joerg Dorchain <dorchain@mpi-sb.mpg.de>.
  62  *
  63  * 06.11.96  - Added v2 code submitted by Joerg Dorchain, but written by
  64  *             Andreas Schwab.
  65  *
  66  * 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org>
  67  * - added Native Language Support
  68  *
  69  *
  70  * I've had no time to add comments - hopefully the function names
  71  * are comments enough. As with all file system checkers, this assumes
  72  * the file system is quiescent - don't use it on a mounted device
  73  * unless you can be sure nobody is writing to it (and remember that the
  74  * kernel can write to it when it searches for files).
  75  *
  76  * Usage: fsck [-larvsm] device
  77  *      -l for a listing of all the filenames
  78  *      -a for automatic repairs (not implemented)
  79  *      -r for repairs (interactive) (not implemented)
  80  *      -v for verbose (tells how many files)
  81  *      -s for superblock info
  82  *      -m for minix-like "mode not cleared" warnings
  83  *      -f force filesystem check even if filesystem marked as valid
  84  *
  85  * The device may be a block device or a image of one, but this isn't
  86  * enforced (but it's not much fun on a character device :-).
  87  */
  88
  89 //usage:#define fsck_minix_trivial_usage
  90 //usage:       "[-larvsmf] BLOCKDEV"
  91 //usage:#define fsck_minix_full_usage "\n\n"
  92 //usage:       "Check MINIX filesystem\n"
  93 //usage:     "\n        -l      List all filenames"
  94 //usage:     "\n        -r      Perform interactive repairs"
  95 //usage:     "\n        -a      Perform automatic repairs"
  96 //usage:     "\n        -v      Verbose"
  97 //usage:     "\n        -s      Output superblock information"
  98 //usage:     "\n        -m      Show \"mode not cleared\" warnings"
  99 //usage:     "\n        -f      Force file system check"
 100
 101 #include <mntent.h>
 102 #include "libbb.h"
 103 #include "minix.h"
 104
 105 #ifndef BLKGETSIZE
 106 #define BLKGETSIZE _IO(0x12,96)    /* return device size */
 107 #endif
 108
 109 struct BUG_bad_inode_size {
 110         char BUG_bad_inode1_size[(INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
 111 #if ENABLE_FEATURE_MINIX2
 112         char BUG_bad_inode2_size[(INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
 113 #endif
 114 };
 115
 116 enum {
 117 #ifdef UNUSED
 118         MINIX1_LINK_MAX = 250,
 119         MINIX2_LINK_MAX = 65530,
 120         MINIX_I_MAP_SLOTS = 8,
 121         MINIX_Z_MAP_SLOTS = 64,
 122         MINIX_V1 = 0x0001,      /* original minix fs */
 123         MINIX_V2 = 0x0002,      /* minix V2 fs */
 124 #endif
 125         MINIX_NAME_MAX = 255,         /* # chars in a file name */
 126 };
 127
 128
 129 #if !ENABLE_FEATURE_MINIX2
 130 enum { version2 = 0 };
 131 #endif
 132
 133 enum { MAX_DEPTH = 32 };
 134
 135 enum { dev_fd = 3 };
 136
 137 struct globals {
 138 #if ENABLE_FEATURE_MINIX2
 139         smallint version2;
 140 #endif
 141         smallint changed;  /* is filesystem modified? */
 142         smallint errors_uncorrected;  /* flag if some error was not corrected */
 143         smallint termios_set;
 144         smallint dirsize;
 145         smallint namelen;
 146         const char *device_name;
 147         int directory, regular, blockdev, chardev, links, symlinks, total;
 148         char *inode_buffer;
 149
 150         char *inode_map;
 151         char *zone_map;
 152
 153         unsigned char *inode_count;
 154         unsigned char *zone_count;
 155
 156         /* File-name data */
 157         int name_depth;
 158         char *name_component[MAX_DEPTH+1];
 159
 160         /* Bigger stuff */
 161         struct termios sv_termios;
 162         char superblock_buffer[BLOCK_SIZE];
 163         char add_zone_ind_blk[BLOCK_SIZE];
 164         char add_zone_dind_blk[BLOCK_SIZE];
 165         IF_FEATURE_MINIX2(char add_zone_tind_blk[BLOCK_SIZE];)
 166         char check_file_blk[BLOCK_SIZE];
 167
 168         /* File-name data */
 169         char current_name[MAX_DEPTH * MINIX_NAME_MAX];
 170 };
 171 #define G (*ptr_to_globals)
 172 #if ENABLE_FEATURE_MINIX2
 173 #define version2           (G.version2           )
 174 #endif
 175 #define changed            (G.changed            )
 176 #define errors_uncorrected (G.errors_uncorrected )
 177 #define termios_set        (G.termios_set        )
 178 #define dirsize            (G.dirsize            )
 179 #define namelen            (G.namelen            )
 180 #define device_name        (G.device_name        )
 181 #define directory          (G.directory          )
 182 #define regular            (G.regular            )
 183 #define blockdev           (G.blockdev           )
 184 #define chardev            (G.chardev            )
 185 #define links              (G.links              )
 186 #define symlinks           (G.symlinks           )
 187 #define total              (G.total              )
 188 #define inode_buffer       (G.inode_buffer       )
 189 #define inode_map          (G.inode_map          )
 190 #define zone_map           (G.zone_map           )
 191 #define inode_count        (G.inode_count        )
 192 #define zone_count         (G.zone_count         )
 193 #define name_depth         (G.name_depth         )
 194 #define name_component     (G.name_component     )
 195 #define sv_termios         (G.sv_termios         )
 196 #define superblock_buffer  (G.superblock_buffer )
 197 #define add_zone_ind_blk   (G.add_zone_ind_blk   )
 198 #define add_zone_dind_blk  (G.add_zone_dind_blk  )
 199 #define add_zone_tind_blk  (G.add_zone_tind_blk  )
 200 #define check_file_blk     (G.check_file_blk     )
 201 #define current_name       (G.current_name       )
 202 #define INIT_G() do { \
 203         SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
 204         dirsize = 16; \
 205         namelen = 14; \
 206         current_name[0] = '/'; \
 207         /*current_name[1] = '\0';*/ \
 208         name_component[0] = &current_name[0]; \
 209 } while (0)
 210
 211
 212 #define OPTION_STR "larvsmf"
 213 enum {
 214         OPT_l = (1 << 0),
 215         OPT_a = (1 << 1),
 216         OPT_r = (1 << 2),
 217         OPT_v = (1 << 3),
 218         OPT_s = (1 << 4),
 219         OPT_w = (1 << 5),
 220         OPT_f = (1 << 6),
 221 };
 222 #define OPT_list      (option_mask32 & OPT_l)
 223 #define OPT_automatic (option_mask32 & OPT_a)
 224 #define OPT_repair    (option_mask32 & OPT_r)
 225 #define OPT_verbose   (option_mask32 & OPT_v)
 226 #define OPT_show      (option_mask32 & OPT_s)
 227 #define OPT_warn_mode (option_mask32 & OPT_w)
 228 #define OPT_force     (option_mask32 & OPT_f)
 229 /* non-automatic repairs requested? */
 230 #define OPT_manual    ((option_mask32 & (OPT_a|OPT_r)) == OPT_r)
 231
 232
 233 #define Inode1 (((struct minix1_inode *) inode_buffer)-1)
 234 #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
 235
 236 #define Super (*(struct minix_superblock *)(superblock_buffer))
 237
 238 #if ENABLE_FEATURE_MINIX2
 239 # define ZONES    ((unsigned)(version2 ? Super.s_zones : Super.s_nzones))
 240 #else
 241 # define ZONES    ((unsigned)(Super.s_nzones))
 242 #endif
 243 #define INODES    ((unsigned)Super.s_ninodes)
 244 #define IMAPS     ((unsigned)Super.s_imap_blocks)
 245 #define ZMAPS     ((unsigned)Super.s_zmap_blocks)
 246 #define FIRSTZONE ((unsigned)Super.s_firstdatazone)
 247 #define ZONESIZE  ((unsigned)Super.s_log_zone_size)
 248 #define MAXSIZE   ((unsigned)Super.s_max_size)
 249 #define MAGIC     (Super.s_magic)
 250
 251 /* gcc likes this more (code is smaller) than macro variant */
 252 static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
 253 {
 254         return (size + n-1) / n;
 255 }
 256
 257 #if !ENABLE_FEATURE_MINIX2
 258 #define INODE_BLOCKS            div_roundup(INODES, MINIX1_INODES_PER_BLOCK)
 259 #else
 260 #define INODE_BLOCKS            div_roundup(INODES, \
 261                                 (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK))
 262 #endif
 263
 264 #define INODE_BUFFER_SIZE       (INODE_BLOCKS * BLOCK_SIZE)
 265 #define NORM_FIRSTZONE          (2 + IMAPS + ZMAPS + INODE_BLOCKS)
 266
 267 /* Before you ask "where they come from?": */
 268 /* setbit/clrbit are supplied by sys/param.h */
 269
 270 static int minix_bit(const char *a, unsigned i)
 271 {
 272         return (a[i >> 3] & (1<<(i & 7)));
 273 }
 274
 275 static void minix_setbit(char *a, unsigned i)
 276 {
 277         setbit(a, i);
 278         changed = 1;
 279 }
 280 static void minix_clrbit(char *a, unsigned i)
 281 {
 282         clrbit(a, i);
 283         changed = 1;
 284 }
 285
 286 /* Note: do not assume 0/1, it is 0/nonzero */
 287 #define zone_in_use(x)  (minix_bit(zone_map,(x)-FIRSTZONE+1))
 288 #define inode_in_use(x) (minix_bit(inode_map,(x)))
 289
 290 #define mark_inode(x)   (minix_setbit(inode_map,(x)))
 291 #define unmark_inode(x) (minix_clrbit(inode_map,(x)))
 292
 293 #define mark_zone(x)    (minix_setbit(zone_map,(x)-FIRSTZONE+1))
 294 #define unmark_zone(x)  (minix_clrbit(zone_map,(x)-FIRSTZONE+1))
 295
 296
 297 static void recursive_check(unsigned ino);
 298 #if ENABLE_FEATURE_MINIX2
 299 static void recursive_check2(unsigned ino);
 300 #endif
 301
 302 static void die(const char *str) NORETURN;
 303 static void die(const char *str)
 304 {
 305         if (termios_set)
 306                 tcsetattr_stdin_TCSANOW(&sv_termios);
 307         bb_error_msg_and_die("%s", str);
 308 }
 309
 310 static void push_filename(const char *name)
 311 {
 312         //  /dir/dir/dir/file
 313         //  ^   ^   ^
 314         // [0] [1] [2] <-name_component[i]
 315         if (name_depth < MAX_DEPTH) {
 316                 int len;
 317                 char *p = name_component[name_depth];
 318                 *p++ = '/';
 319                 len = sprintf(p, "%.*s", namelen, name);
 320                 name_component[name_depth + 1] = p + len;
 321         }
 322         name_depth++;
 323 }
 324
 325 static void pop_filename(void)
 326 {
 327         name_depth--;
 328         if (name_depth < MAX_DEPTH) {
 329                 *name_component[name_depth] = '\0';
 330                 if (!name_depth) {
 331                         current_name[0] = '/';
 332                         current_name[1] = '\0';
 333                 }
 334         }
 335 }
 336
 337 static int ask(const char *string, int def)
 338 {
 339         int c;
 340
 341         if (!OPT_repair) {
 342                 bb_putchar('\n');
 343                 errors_uncorrected = 1;
 344                 return 0;
 345         }
 346         if (OPT_automatic) {
 347                 bb_putchar('\n');
 348                 if (!def)
 349                         errors_uncorrected = 1;
 350                 return def;
 351         }
 352         printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
 353         for (;;) {
 354                 fflush_all();
 355                 c = getchar();
 356                 if (c == EOF) {
 357                         if (!def)
 358                                 errors_uncorrected = 1;
 359                         return def;
 360                 }
 361                 if (c == '\n')
 362                         break;
 363                 c |= 0x20; /* tolower */
 364                 if (c == 'y') {
 365                         def = 1;
 366                         break;
 367                 }
 368                 if (c == 'n') {
 369                         def = 0;
 370                         break;
 371                 }
 372         }
 373         if (def)
 374                 printf("y\n");
 375         else {
 376                 printf("n\n");
 377                 errors_uncorrected = 1;
 378         }
 379         return def;
 380 }
 381
 382 /*
 383  * Make certain that we aren't checking a filesystem that is on a
 384  * mounted partition.  Code adapted from e2fsck, Copyright (C) 1993,
 385  * 1994 Theodore Ts'o.  Also licensed under GPL.
 386  */
 387 static void check_mount(void)
 388 {
 389         if (find_mount_point(device_name, 0)) {
 390                 int cont;
 391 #if ENABLE_FEATURE_MTAB_SUPPORT
 392                 /*
 393                  * If the root is mounted read-only, then /etc/mtab is
 394                  * probably not correct; so we won't issue a warning based on
 395                  * it.
 396                  */
 397                 int fd = open(bb_path_mtab_file, O_RDWR);
 398
 399                 if (fd < 0 && errno == EROFS)
 400                         return;
 401                 close(fd);
 402 #endif
 403                 printf("%s is mounted. ", device_name);
 404                 cont = 0;
 405                 if (isatty(0) && isatty(1))
 406                         cont = ask("Do you really want to continue", 0);
 407                 if (!cont) {
 408                         printf("Check aborted\n");
 409                         exit(EXIT_SUCCESS);
 410                 }
 411         }
 412 }
 413
 414 /*
 415  * check_zone_nr checks to see that *nr is a valid zone nr. If it
 416  * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
 417  * if an error was corrected, and returns the zone (0 for no zone
 418  * or a bad zone-number).
 419  */
 420 static int check_zone_nr2(uint32_t *nr, smallint *corrected)
 421 {
 422         const char *msg;
 423         if (!*nr)
 424                 return 0;
 425         if (*nr < FIRSTZONE)
 426                 msg = "< FIRSTZONE";
 427         else if (*nr >= ZONES)
 428                 msg = ">= ZONES";
 429         else
 430                 return *nr;
 431         printf("Zone nr %s in file '%s'. ", msg, current_name);
 432         if (ask("Remove block", 1)) {
 433                 *nr = 0;
 434                 *corrected = 1;
 435         }
 436         return 0;
 437 }
 438
 439 static int check_zone_nr(uint16_t *nr, smallint *corrected)
 440 {
 441         uint32_t nr32 = *nr;
 442         int r = check_zone_nr2(&nr32, corrected);
 443         *nr = (uint16_t)nr32;
 444         return r;
 445 }
 446
 447 /*
 448  * read-block reads block nr into the buffer at addr.
 449  */
 450 static void read_block(unsigned nr, void *addr)
 451 {
 452         if (!nr) {
 453                 memset(addr, 0, BLOCK_SIZE);
 454                 return;
 455         }
 456         xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
 457         if (BLOCK_SIZE != full_read(dev_fd, addr, BLOCK_SIZE)) {
 458                 printf("%s: bad block %u in file '%s'\n",
 459                                 bb_msg_read_error, nr, current_name);
 460                 errors_uncorrected = 1;
 461                 memset(addr, 0, BLOCK_SIZE);
 462         }
 463 }
 464
 465 /*
 466  * write_block writes block nr to disk.
 467  */
 468 static void write_block(unsigned nr, void *addr)
 469 {
 470         if (!nr)
 471                 return;
 472         if (nr < FIRSTZONE || nr >= ZONES) {
 473                 printf("Internal error: trying to write bad block\n"
 474                            "Write request ignored\n");
 475                 errors_uncorrected = 1;
 476                 return;
 477         }
 478         xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
 479         if (BLOCK_SIZE != full_write(dev_fd, addr, BLOCK_SIZE)) {
 480                 printf("%s: bad block %u in file '%s'\n",
 481                                 bb_msg_write_error, nr, current_name);
 482                 errors_uncorrected = 1;
 483         }
 484 }
 485
 486 /*
 487  * map_block calculates the absolute block nr of a block in a file.
 488  * It sets 'changed' if the inode has needed changing, and re-writes
 489  * any indirect blocks with errors.
 490  */
 491 static int map_block(struct minix1_inode *inode, unsigned blknr)
 492 {
 493         uint16_t ind[BLOCK_SIZE >> 1];
 494         int block, result;
 495         smallint blk_chg;
 496
 497         if (blknr < 7)
 498                 return check_zone_nr(inode->i_zone + blknr, &changed);
 499         blknr -= 7;
 500         if (blknr < 512) {
 501                 block = check_zone_nr(inode->i_zone + 7, &changed);
 502                 goto common;
 503         }
 504         blknr -= 512;
 505         block = check_zone_nr(inode->i_zone + 8, &changed);
 506         read_block(block, ind); /* double indirect */
 507         blk_chg = 0;
 508         result = check_zone_nr(&ind[blknr / 512], &blk_chg);
 509         if (blk_chg)
 510                 write_block(block, ind);
 511         block = result;
 512  common:
 513         read_block(block, ind);
 514         blk_chg = 0;
 515         result = check_zone_nr(&ind[blknr % 512], &blk_chg);
 516         if (blk_chg)
 517                 write_block(block, ind);
 518         return result;
 519 }
 520
 521 #if ENABLE_FEATURE_MINIX2
 522 static int map_block2(struct minix2_inode *inode, unsigned blknr)
 523 {
 524         uint32_t ind[BLOCK_SIZE >> 2];
 525         int block, result;
 526         smallint blk_chg;
 527
 528         if (blknr < 7)
 529                 return check_zone_nr2(inode->i_zone + blknr, &changed);
 530         blknr -= 7;
 531         if (blknr < 256) {
 532                 block = check_zone_nr2(inode->i_zone + 7, &changed);
 533                 goto common2;
 534         }
 535         blknr -= 256;
 536         if (blknr < 256 * 256) {
 537                 block = check_zone_nr2(inode->i_zone + 8, &changed);
 538                 goto common1;
 539         }
 540         blknr -= 256 * 256;
 541         block = check_zone_nr2(inode->i_zone + 9, &changed);
 542         read_block(block, ind); /* triple indirect */
 543         blk_chg = 0;
 544         result = check_zone_nr2(&ind[blknr / (256 * 256)], &blk_chg);
 545         if (blk_chg)
 546                 write_block(block, ind);
 547         block = result;
 548  common1:
 549         read_block(block, ind); /* double indirect */
 550         blk_chg = 0;
 551         result = check_zone_nr2(&ind[(blknr / 256) % 256], &blk_chg);
 552         if (blk_chg)
 553                 write_block(block, ind);
 554         block = result;
 555  common2:
 556         read_block(block, ind);
 557         blk_chg = 0;
 558         result = check_zone_nr2(&ind[blknr % 256], &blk_chg);
 559         if (blk_chg)
 560                 write_block(block, ind);
 561         return result;
 562 }
 563 #endif
 564
 565 static void write_superblock(void)
 566 {
 567         /*
 568          * Set the state of the filesystem based on whether or not there
 569          * are uncorrected errors.  The filesystem valid flag is
 570          * unconditionally set if we get this far.
 571          */
 572         Super.s_state |= MINIX_VALID_FS | MINIX_ERROR_FS;
 573         if (!errors_uncorrected)
 574                 Super.s_state &= ~MINIX_ERROR_FS;
 575
 576         xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
 577         if (BLOCK_SIZE != full_write(dev_fd, superblock_buffer, BLOCK_SIZE))
 578                 die("can't write superblock");
 579 }
 580
 581 static void write_tables(void)
 582 {
 583         write_superblock();
 584
 585         if (IMAPS * BLOCK_SIZE != write(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
 586                 die("can't write inode map");
 587         if (ZMAPS * BLOCK_SIZE != write(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
 588                 die("can't write zone map");
 589         if (INODE_BUFFER_SIZE != write(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
 590                 die("can't write inodes");
 591 }
 592
 593 static void get_dirsize(void)
 594 {
 595         int block;
 596         char blk[BLOCK_SIZE];
 597         int size;
 598
 599 #if ENABLE_FEATURE_MINIX2
 600         if (version2)
 601                 block = Inode2[MINIX_ROOT_INO].i_zone[0];
 602         else
 603 #endif
 604                 block = Inode1[MINIX_ROOT_INO].i_zone[0];
 605         read_block(block, blk);
 606         for (size = 16; size < BLOCK_SIZE; size <<= 1) {
 607                 if (strcmp(blk + size + 2, "..") == 0) {
 608                         dirsize = size;
 609                         namelen = size - 2;
 610                         return;
 611                 }
 612         }
 613         /* use defaults */
 614 }
 615
 616 static void read_superblock(void)
 617 {
 618         xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
 619         if (BLOCK_SIZE != full_read(dev_fd, superblock_buffer, BLOCK_SIZE))
 620                 die("can't read superblock");
 621         /* already initialized to:
 622         namelen = 14;
 623         dirsize = 16;
 624         version2 = 0;
 625         */
 626         if (MAGIC == MINIX1_SUPER_MAGIC) {
 627         } else if (MAGIC == MINIX1_SUPER_MAGIC2) {
 628                 namelen = 30;
 629                 dirsize = 32;
 630 #if ENABLE_FEATURE_MINIX2
 631         } else if (MAGIC == MINIX2_SUPER_MAGIC) {
 632                 version2 = 1;
 633         } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
 634                 namelen = 30;
 635                 dirsize = 32;
 636                 version2 = 1;
 637 #endif
 638         } else
 639                 die("bad magic number in superblock");
 640         if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
 641                 die("only 1k blocks/zones supported");
 642         if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
 643                 die("bad s_imap_blocks field in superblock");
 644         if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
 645                 die("bad s_zmap_blocks field in superblock");
 646 }
 647
 648 static void read_tables(void)
 649 {
 650         inode_map = xzalloc(IMAPS * BLOCK_SIZE);
 651         zone_map = xzalloc(ZMAPS * BLOCK_SIZE);
 652         inode_buffer = xmalloc(INODE_BUFFER_SIZE);
 653         inode_count = xmalloc(INODES + 1);
 654         zone_count = xmalloc(ZONES);
 655         if (IMAPS * BLOCK_SIZE != read(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
 656                 die("can't read inode map");
 657         if (ZMAPS * BLOCK_SIZE != read(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
 658                 die("can't read zone map");
 659         if (INODE_BUFFER_SIZE != read(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
 660                 die("can't read inodes");
 661         if (NORM_FIRSTZONE != FIRSTZONE) {
 662                 printf("warning: firstzone!=norm_firstzone\n");
 663                 errors_uncorrected = 1;
 664         }
 665         get_dirsize();
 666         if (OPT_show) {
 667                 printf("%u inodes\n"
 668                         "%u blocks\n"
 669                         "Firstdatazone=%u (%u)\n"
 670                         "Zonesize=%u\n"
 671                         "Maxsize=%u\n"
 672                         "Filesystem state=%u\n"
 673                         "namelen=%u\n\n",
 674                         INODES,
 675                         ZONES,
 676                         FIRSTZONE, NORM_FIRSTZONE,
 677                         BLOCK_SIZE << ZONESIZE,
 678                         MAXSIZE,
 679                         Super.s_state,
 680                         namelen);
 681         }
 682 }
 683
 684 static void get_inode_common(unsigned nr, uint16_t i_mode)
 685 {
 686         total++;
 687         if (!inode_count[nr]) {
 688                 if (!inode_in_use(nr)) {
 689                         printf("Inode %u is marked as 'unused', but it is used "
 690                                         "for file '%s'\n", nr, current_name);
 691                         if (OPT_repair) {
 692                                 if (ask("Mark as 'in use'", 1))
 693                                         mark_inode(nr);
 694                                 else
 695                                         errors_uncorrected = 1;
 696                         }
 697                 }
 698                 if (S_ISDIR(i_mode))
 699                         directory++;
 700                 else if (S_ISREG(i_mode))
 701                         regular++;
 702                 else if (S_ISCHR(i_mode))
 703                         chardev++;
 704                 else if (S_ISBLK(i_mode))
 705                         blockdev++;
 706                 else if (S_ISLNK(i_mode))
 707                         symlinks++;
 708                 else if (S_ISSOCK(i_mode));
 709                 else if (S_ISFIFO(i_mode));
 710                 else {
 711                         printf("%s has mode %05o\n", current_name, i_mode);
 712                 }
 713         } else
 714                 links++;
 715         if (!++inode_count[nr]) {
 716                 printf("Warning: inode count too big\n");
 717                 inode_count[nr]--;
 718                 errors_uncorrected = 1;
 719         }
 720 }
 721
 722 static struct minix1_inode *get_inode(unsigned nr)
 723 {
 724         struct minix1_inode *inode;
 725
 726         if (!nr || nr > INODES)
 727                 return NULL;
 728         inode = Inode1 + nr;
 729         get_inode_common(nr, inode->i_mode);
 730         return inode;
 731 }
 732
 733 #if ENABLE_FEATURE_MINIX2
 734 static struct minix2_inode *get_inode2(unsigned nr)
 735 {
 736         struct minix2_inode *inode;
 737
 738         if (!nr || nr > INODES)
 739                 return NULL;
 740         inode = Inode2 + nr;
 741         get_inode_common(nr, inode->i_mode);
 742         return inode;
 743 }
 744 #endif
 745
 746 static void check_root(void)
 747 {
 748         struct minix1_inode *inode = Inode1 + MINIX_ROOT_INO;
 749
 750         if (!inode || !S_ISDIR(inode->i_mode))
 751                 die("root inode isn't a directory");
 752 }
 753
 754 #if ENABLE_FEATURE_MINIX2
 755 static void check_root2(void)
 756 {
 757         struct minix2_inode *inode = Inode2 + MINIX_ROOT_INO;
 758
 759         if (!inode || !S_ISDIR(inode->i_mode))
 760                 die("root inode isn't a directory");
 761 }
 762 #else
 763 void check_root2(void);
 764 #endif
 765
 766 static int add_zone_common(int block, smallint *corrected)
 767 {
 768         if (!block)
 769                 return 0;
 770         if (zone_count[block]) {
 771                 printf("Already used block is reused in file '%s'. ",
 772                                 current_name);
 773                 if (ask("Clear", 1)) {
 774                         block = 0;
 775                         *corrected = 1;
 776                         return -1; /* "please zero out *znr" */
 777                 }
 778         }
 779         if (!zone_in_use(block)) {
 780                 printf("Block %d in file '%s' is marked as 'unused'. ",
 781                                 block, current_name);
 782                 if (ask("Correct", 1))
 783                         mark_zone(block);
 784         }
 785         if (!++zone_count[block])
 786                 zone_count[block]--;
 787         return block;
 788 }
 789
 790 static int add_zone(uint16_t *znr, smallint *corrected)
 791 {
 792         int block;
 793
 794         block = check_zone_nr(znr, corrected);
 795         block = add_zone_common(block, corrected);
 796         if (block == -1) {
 797                 *znr = 0;
 798                 block = 0;
 799         }
 800         return block;
 801 }
 802
 803 #if ENABLE_FEATURE_MINIX2
 804 static int add_zone2(uint32_t *znr, smallint *corrected)
 805 {
 806         int block;
 807
 808         block = check_zone_nr2(znr, corrected);
 809         block = add_zone_common(block, corrected);
 810         if (block == -1) {
 811                 *znr = 0;
 812                 block = 0;
 813         }
 814         return block;
 815 }
 816 #endif
 817
 818 static void add_zone_ind(uint16_t *znr, smallint *corrected)
 819 {
 820         int i;
 821         int block;
 822         smallint chg_blk = 0;
 823
 824         block = add_zone(znr, corrected);
 825         if (!block)
 826                 return;
 827         read_block(block, add_zone_ind_blk);
 828         for (i = 0; i < (BLOCK_SIZE >> 1); i++)
 829                 add_zone(i + (uint16_t *) add_zone_ind_blk, &chg_blk);
 830         if (chg_blk)
 831                 write_block(block, add_zone_ind_blk);
 832 }
 833
 834 #if ENABLE_FEATURE_MINIX2
 835 static void add_zone_ind2(uint32_t *znr, smallint *corrected)
 836 {
 837         int i;
 838         int block;
 839         smallint chg_blk = 0;
 840
 841         block = add_zone2(znr, corrected);
 842         if (!block)
 843                 return;
 844         read_block(block, add_zone_ind_blk);
 845         for (i = 0; i < BLOCK_SIZE >> 2; i++)
 846                 add_zone2(i + (uint32_t *) add_zone_ind_blk, &chg_blk);
 847         if (chg_blk)
 848                 write_block(block, add_zone_ind_blk);
 849 }
 850 #endif
 851
 852 static void add_zone_dind(uint16_t *znr, smallint *corrected)
 853 {
 854         int i;
 855         int block;
 856         smallint chg_blk = 0;
 857
 858         block = add_zone(znr, corrected);
 859         if (!block)
 860                 return;
 861         read_block(block, add_zone_dind_blk);
 862         for (i = 0; i < (BLOCK_SIZE >> 1); i++)
 863                 add_zone_ind(i + (uint16_t *) add_zone_dind_blk, &chg_blk);
 864         if (chg_blk)
 865                 write_block(block, add_zone_dind_blk);
 866 }
 867
 868 #if ENABLE_FEATURE_MINIX2
 869 static void add_zone_dind2(uint32_t *znr, smallint *corrected)
 870 {
 871         int i;
 872         int block;
 873         smallint chg_blk = 0;
 874
 875         block = add_zone2(znr, corrected);
 876         if (!block)
 877                 return;
 878         read_block(block, add_zone_dind_blk);
 879         for (i = 0; i < BLOCK_SIZE >> 2; i++)
 880                 add_zone_ind2(i + (uint32_t *) add_zone_dind_blk, &chg_blk);
 881         if (chg_blk)
 882                 write_block(block, add_zone_dind_blk);
 883 }
 884
 885 static void add_zone_tind2(uint32_t *znr, smallint *corrected)
 886 {
 887         int i;
 888         int block;
 889         smallint chg_blk = 0;
 890
 891         block = add_zone2(znr, corrected);
 892         if (!block)
 893                 return;
 894         read_block(block, add_zone_tind_blk);
 895         for (i = 0; i < BLOCK_SIZE >> 2; i++)
 896                 add_zone_dind2(i + (uint32_t *) add_zone_tind_blk, &chg_blk);
 897         if (chg_blk)
 898                 write_block(block, add_zone_tind_blk);
 899 }
 900 #endif
 901
 902 static void check_zones(unsigned i)
 903 {
 904         struct minix1_inode *inode;
 905
 906         if (!i || i > INODES)
 907                 return;
 908         if (inode_count[i] > 1)         /* have we counted this file already? */
 909                 return;
 910         inode = Inode1 + i;
 911         if (!S_ISDIR(inode->i_mode)
 912          && !S_ISREG(inode->i_mode)
 913          && !S_ISLNK(inode->i_mode)
 914         ) {
 915                 return;
 916         }
 917         for (i = 0; i < 7; i++)
 918                 add_zone(i + inode->i_zone, &changed);
 919         add_zone_ind(7 + inode->i_zone, &changed);
 920         add_zone_dind(8 + inode->i_zone, &changed);
 921 }
 922
 923 #if ENABLE_FEATURE_MINIX2
 924 static void check_zones2(unsigned i)
 925 {
 926         struct minix2_inode *inode;
 927
 928         if (!i || i > INODES)
 929                 return;
 930         if (inode_count[i] > 1)         /* have we counted this file already? */
 931                 return;
 932         inode = Inode2 + i;
 933         if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
 934                 && !S_ISLNK(inode->i_mode))
 935                 return;
 936         for (i = 0; i < 7; i++)
 937                 add_zone2(i + inode->i_zone, &changed);
 938         add_zone_ind2(7 + inode->i_zone, &changed);
 939         add_zone_dind2(8 + inode->i_zone, &changed);
 940         add_zone_tind2(9 + inode->i_zone, &changed);
 941 }
 942 #endif
 943
 944 static void check_file(struct minix1_inode *dir, unsigned offset)
 945 {
 946         struct minix1_inode *inode;
 947         int ino;
 948         char *name;
 949         int block;
 950
 951         block = map_block(dir, offset / BLOCK_SIZE);
 952         read_block(block, check_file_blk);
 953         name = check_file_blk + (offset % BLOCK_SIZE) + 2;
 954         ino = *(uint16_t *) (name - 2);
 955         if (ino > INODES) {
 956                 printf("%s contains a bad inode number for file '%.*s'. ",
 957                                 current_name, namelen, name);
 958                 if (ask("Remove", 1)) {
 959                         *(uint16_t *) (name - 2) = 0;
 960                         write_block(block, check_file_blk);
 961                 }
 962                 ino = 0;
 963         }
 964         push_filename(name);
 965         inode = get_inode(ino);
 966         pop_filename();
 967         if (!offset) {
 968                 if (inode && LONE_CHAR(name, '.'))
 969                         return;
 970                 printf("%s: bad directory: '.' isn't first\n", current_name);
 971                 errors_uncorrected = 1;
 972         }
 973         if (offset == dirsize) {
 974                 if (inode && strcmp("..", name) == 0)
 975                         return;
 976                 printf("%s: bad directory: '..' isn't second\n", current_name);
 977                 errors_uncorrected = 1;
 978         }
 979         if (!inode)
 980                 return;
 981         push_filename(name);
 982         if (OPT_list) {
 983                 if (OPT_verbose)
 984                         printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
 985                 printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
 986         }
 987         check_zones(ino);
 988         if (inode && S_ISDIR(inode->i_mode))
 989                 recursive_check(ino);
 990         pop_filename();
 991 }
 992
 993 #if ENABLE_FEATURE_MINIX2
 994 static void check_file2(struct minix2_inode *dir, unsigned offset)
 995 {
 996         struct minix2_inode *inode;
 997         int ino;
 998         char *name;
 999         int block;
1000
1001         block = map_block2(dir, offset / BLOCK_SIZE);
1002         read_block(block, check_file_blk);
1003         name = check_file_blk + (offset % BLOCK_SIZE) + 2;
1004         ino = *(uint16_t *) (name - 2);
1005         if (ino > INODES) {
1006                 printf("%s contains a bad inode number for file '%.*s'. ",
1007                                 current_name, namelen, name);
1008                 if (ask("Remove", 1)) {
1009                         *(uint16_t *) (name - 2) = 0;
1010                         write_block(block, check_file_blk);
1011                 }
1012                 ino = 0;
1013         }
1014         push_filename(name);
1015         inode = get_inode2(ino);
1016         pop_filename();
1017         if (!offset) {
1018                 if (inode && LONE_CHAR(name, '.'))
1019                         return;
1020                 printf("%s: bad directory: '.' isn't first\n", current_name);
1021                 errors_uncorrected = 1;
1022         }
1023         if (offset == dirsize) {
1024                 if (inode && strcmp("..", name) == 0)
1025                         return;
1026                 printf("%s: bad directory: '..' isn't second\n", current_name);
1027                 errors_uncorrected = 1;
1028         }
1029         if (!inode)
1030                 return;
1031         push_filename(name);
1032         if (OPT_list) {
1033                 if (OPT_verbose)
1034                         printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1035                 printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
1036         }
1037         check_zones2(ino);
1038         if (inode && S_ISDIR(inode->i_mode))
1039                 recursive_check2(ino);
1040         pop_filename();
1041 }
1042 #endif
1043
1044 static void recursive_check(unsigned ino)
1045 {
1046         struct minix1_inode *dir;
1047         unsigned offset;
1048
1049         dir = Inode1 + ino;
1050         if (!S_ISDIR(dir->i_mode))
1051                 die("internal error");
1052         if (dir->i_size < 2 * dirsize) {
1053                 printf("%s: bad directory: size<32", current_name);
1054                 errors_uncorrected = 1;
1055         }
1056         for (offset = 0; offset < dir->i_size; offset += dirsize)
1057                 check_file(dir, offset);
1058 }
1059
1060 #if ENABLE_FEATURE_MINIX2
1061 static void recursive_check2(unsigned ino)
1062 {
1063         struct minix2_inode *dir;
1064         unsigned offset;
1065
1066         dir = Inode2 + ino;
1067         if (!S_ISDIR(dir->i_mode))
1068                 die("internal error");
1069         if (dir->i_size < 2 * dirsize) {
1070                 printf("%s: bad directory: size<32", current_name);
1071                 errors_uncorrected = 1;
1072         }
1073         for (offset = 0; offset < dir->i_size; offset += dirsize)
1074                 check_file2(dir, offset);
1075 }
1076 #endif
1077
1078 static int bad_zone(int i)
1079 {
1080         char buffer[BLOCK_SIZE];
1081
1082         xlseek(dev_fd, BLOCK_SIZE * i, SEEK_SET);
1083         return (BLOCK_SIZE != full_read(dev_fd, buffer, BLOCK_SIZE));
1084 }
1085
1086 static void check_counts(void)
1087 {
1088         int i;
1089
1090         for (i = 1; i <= INODES; i++) {
1091                 if (OPT_warn_mode && Inode1[i].i_mode && !inode_in_use(i)) {
1092                         printf("Inode %d has non-zero mode. ", i);
1093                         if (ask("Clear", 1)) {
1094                                 Inode1[i].i_mode = 0;
1095                                 changed = 1;
1096                         }
1097                 }
1098                 if (!inode_count[i]) {
1099                         if (!inode_in_use(i))
1100                                 continue;
1101                         printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
1102                         if (ask("Clear", 1))
1103                                 unmark_inode(i);
1104                         continue;
1105                 }
1106                 if (!inode_in_use(i)) {
1107                         printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
1108                         if (ask("Set", 1))
1109                                 mark_inode(i);
1110                 }
1111                 if (Inode1[i].i_nlinks != inode_count[i]) {
1112                         printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
1113                                 i, Inode1[i].i_mode, Inode1[i].i_nlinks,
1114                                 inode_count[i]);
1115                         if (ask("Set i_nlinks to count", 1)) {
1116                                 Inode1[i].i_nlinks = inode_count[i];
1117                                 changed = 1;
1118                         }
1119                 }
1120         }
1121         for (i = FIRSTZONE; i < ZONES; i++) {
1122                 if ((zone_in_use(i) != 0) == zone_count[i])
1123                         continue;
1124                 if (!zone_count[i]) {
1125                         if (bad_zone(i))
1126                                 continue;
1127                         printf("Zone %d is marked 'in use', but no file uses it. ", i);
1128                         if (ask("Unmark", 1))
1129                                 unmark_zone(i);
1130                         continue;
1131                 }
1132                 printf("Zone %d: %sin use, counted=%d\n",
1133                         i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1134         }
1135 }
1136
1137 #if ENABLE_FEATURE_MINIX2
1138 static void check_counts2(void)
1139 {
1140         int i;
1141
1142         for (i = 1; i <= INODES; i++) {
1143                 if (OPT_warn_mode && Inode2[i].i_mode && !inode_in_use(i)) {
1144                         printf("Inode %d has non-zero mode. ", i);
1145                         if (ask("Clear", 1)) {
1146                                 Inode2[i].i_mode = 0;
1147                                 changed = 1;
1148                         }
1149                 }
1150                 if (!inode_count[i]) {
1151                         if (!inode_in_use(i))
1152                                 continue;
1153                         printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
1154                         if (ask("Clear", 1))
1155                                 unmark_inode(i);
1156                         continue;
1157                 }
1158                 if (!inode_in_use(i)) {
1159                         printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
1160                         if (ask("Set", 1))
1161                                 mark_inode(i);
1162                 }
1163                 if (Inode2[i].i_nlinks != inode_count[i]) {
1164                         printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
1165                                 i, Inode2[i].i_mode, Inode2[i].i_nlinks,
1166                                 inode_count[i]);
1167                         if (ask("Set i_nlinks to count", 1)) {
1168                                 Inode2[i].i_nlinks = inode_count[i];
1169                                 changed = 1;
1170                         }
1171                 }
1172         }
1173         for (i = FIRSTZONE; i < ZONES; i++) {
1174                 if ((zone_in_use(i) != 0) == zone_count[i])
1175                         continue;
1176                 if (!zone_count[i]) {
1177                         if (bad_zone(i))
1178                                 continue;
1179                         printf("Zone %d is marked 'in use', but no file uses it. ", i);
1180                         if (ask("Unmark", 1))
1181                                 unmark_zone(i);
1182                         continue;
1183                 }
1184                 printf("Zone %d: %sin use, counted=%d\n",
1185                         i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1186         }
1187 }
1188 #endif
1189
1190 static void check(void)
1191 {
1192         memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1193         memset(zone_count, 0, ZONES * sizeof(*zone_count));
1194         check_zones(MINIX_ROOT_INO);
1195         recursive_check(MINIX_ROOT_INO);
1196         check_counts();
1197 }
1198
1199 #if ENABLE_FEATURE_MINIX2
1200 static void check2(void)
1201 {
1202         memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1203         memset(zone_count, 0, ZONES * sizeof(*zone_count));
1204         check_zones2(MINIX_ROOT_INO);
1205         recursive_check2(MINIX_ROOT_INO);
1206         check_counts2();
1207 }
1208 #else
1209 void check2(void);
1210 #endif
1211
1212 int fsck_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1213 int fsck_minix_main(int argc UNUSED_PARAM, char **argv)
1214 {
1215         struct termios tmp;
1216         int retcode = 0;
1217
1218         xfunc_error_retval = 8;
1219
1220         INIT_G();
1221
1222         opt_complementary = "=1:ar"; /* one argument; -a assumes -r */
1223         getopt32(argv, OPTION_STR);
1224         argv += optind;
1225         device_name = argv[0];
1226
1227         check_mount();  /* trying to check a mounted filesystem? */
1228         if (OPT_manual) {
1229                 if (!isatty(0) || !isatty(1))
1230                         die("need terminal for interactive repairs");
1231         }
1232         xmove_fd(xopen(device_name, OPT_repair ? O_RDWR : O_RDONLY), dev_fd);
1233
1234         /*sync(); paranoia? */
1235         read_superblock();
1236
1237         /*
1238          * Determine whether or not we should continue with the checking.
1239          * This is based on the status of the filesystem valid and error
1240          * flags and whether or not the -f switch was specified on the
1241          * command line.
1242          */
1243         printf("%s: %s\n", applet_name, bb_banner);
1244
1245         if (!(Super.s_state & MINIX_ERROR_FS)
1246          && (Super.s_state & MINIX_VALID_FS) && !OPT_force
1247         ) {
1248                 if (OPT_repair)
1249                         printf("%s is clean, check is skipped\n", device_name);
1250                 return 0;
1251         } else if (OPT_force)
1252                 printf("Forcing filesystem check on %s\n", device_name);
1253         else if (OPT_repair)
1254                 printf("Filesystem on %s is dirty, needs checking\n",
1255                         device_name);
1256
1257         read_tables();
1258
1259         if (OPT_manual) {
1260                 tcgetattr(0, &sv_termios);
1261                 tmp = sv_termios;
1262                 tmp.c_lflag &= ~(ICANON | ECHO);
1263                 tcsetattr_stdin_TCSANOW(&tmp);
1264                 termios_set = 1;
1265         }
1266
1267         if (version2) {
1268                 check_root2();
1269                 check2();
1270         } else {
1271                 check_root();
1272                 check();
1273         }
1274
1275         if (OPT_verbose) {
1276                 int i, free_cnt;
1277
1278                 for (i = 1, free_cnt = 0; i <= INODES; i++)
1279                         if (!inode_in_use(i))
1280                                 free_cnt++;
1281                 printf("\n%6u inodes used (%u%%)\n", (INODES - free_cnt),
1282                         100 * (INODES - free_cnt) / INODES);
1283                 for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++)
1284                         if (!zone_in_use(i))
1285                                 free_cnt++;
1286                 printf("%6u zones used (%u%%)\n\n"
1287                         "%6u regular files\n"
1288                         "%6u directories\n"
1289                         "%6u character device files\n"
1290                         "%6u block device files\n"
1291                         "%6u links\n"
1292                         "%6u symbolic links\n"
1293                         "------\n"
1294                         "%6u files\n",
1295                         (ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES,
1296                         regular, directory, chardev, blockdev,
1297                         links - 2 * directory + 1, symlinks,
1298                         total - 2 * directory + 1);
1299         }
1300         if (changed) {
1301                 write_tables();
1302                 printf("FILE SYSTEM HAS BEEN CHANGED\n");
1303                 sync();
1304         } else if (OPT_repair)
1305                 write_superblock();
1306
1307         if (OPT_manual)
1308                 tcsetattr_stdin_TCSANOW(&sv_termios);
1309
1310         if (changed)
1311                 retcode += 3;
1312         if (errors_uncorrected)
1313                 retcode += 4;
1314         return retcode;
1315 }