1 /* vi: set sw=4 ts=4: */
3 * fsck.c - a file system consistency checker for Linux.
5 * (C) 1991, 1992 Linus Torvalds.
7 * Licensed under GPLv2, see file LICENSE in this tarball for details.
11 * 09.11.91 - made the first rudimentary functions
13 * 10.11.91 - updated, does checking, no repairs yet.
14 * Sent out to the mailing-list for testing.
16 * 14.11.91 - Testing seems to have gone well. Added some
17 * correction-code, and changed some functions.
19 * 15.11.91 - More correction code. Hopefully it notices most
20 * cases now, and tries to do something about them.
22 * 16.11.91 - More corrections (thanks to Mika Jalava). Most
23 * things seem to work now. Yeah, sure.
26 * 19.04.92 - Had to start over again from this old version, as a
27 * kernel bug ate my enhanced fsck in february.
29 * 28.02.93 - added support for different directory entry sizes..
31 * Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with
32 * superblock information
34 * Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform
35 * to that required by fsutil
37 * Mon Jan 3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu)
38 * Added support for file system valid flag. Also
39 * added program_version variable and output of
40 * program name and version number when program
43 * 30.10.94 - added support for v2 filesystem
44 * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
46 * 10.12.94 - added test to prevent checking of mounted fs adapted
47 * from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck
48 * program. (Daniel Quinlan, quinlan@yggdrasil.com)
50 * 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such
51 * for modern libcs (janl@math.uio.no, Nicolai Langfeldt)
53 * 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk
54 * (Russell King). He made them for ARM. It would seem
55 * that the ARM is powerful enough to do this in C whereas
56 * i386 and m64k must use assembly to get it fast >:-)
57 * This should make minix fsck system-independent.
58 * (janl@math.uio.no, Nicolai Langfeldt)
60 * 04.11.96 - Added minor fixes from Andreas Schwab to avoid compiler
61 * warnings. Added mc68k bitops from
62 * Joerg Dorchain <dorchain@mpi-sb.mpg.de>.
64 * 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by
67 * 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org>
68 * - added Native Language Support
71 * I've had no time to add comments - hopefully the function names
72 * are comments enough. As with all file system checkers, this assumes
73 * the file system is quiescent - don't use it on a mounted device
74 * unless you can be sure nobody is writing to it (and remember that the
75 * kernel can write to it when it searches for files).
77 * Usage: fsck [-larvsm] device
78 * -l for a listing of all the filenames
79 * -a for automatic repairs (not implemented)
80 * -r for repairs (interactive) (not implemented)
81 * -v for verbose (tells how many files)
82 * -s for superblock info
83 * -m for minix-like "mode not cleared" warnings
84 * -f force filesystem check even if filesystem marked as valid
86 * The device may be a block device or a image of one, but this isn't
87 * enforced (but it's not much fun on a character device :-).
95 #define BLKGETSIZE _IO(0x12,96) /* return device size */
98 struct BUG_bad_inode_size {
99 char BUG_bad_inode1_size[(INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
100 #if ENABLE_FEATURE_MINIX2
101 char BUG_bad_inode2_size[(INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
107 MINIX1_LINK_MAX = 250,
108 MINIX2_LINK_MAX = 65530,
109 MINIX_I_MAP_SLOTS = 8,
110 MINIX_Z_MAP_SLOTS = 64,
111 MINIX_V1 = 0x0001, /* original minix fs */
112 MINIX_V2 = 0x0002, /* minix V2 fs */
114 MINIX_NAME_MAX = 255, /* # chars in a file name */
118 #if !ENABLE_FEATURE_MINIX2
119 enum { version2 = 0 };
122 enum { MAX_DEPTH = 32 };
127 #if ENABLE_FEATURE_MINIX2
130 smallint changed; /* is filesystem modified? */
131 smallint errors_uncorrected; /* flag if some error was not corrected */
132 smallint termios_set;
135 const char *device_name;
136 int directory, regular, blockdev, chardev, links, symlinks, total;
142 unsigned char *inode_count;
143 unsigned char *zone_count;
147 char *name_component[MAX_DEPTH+1];
150 struct termios sv_termios;
151 char superblock_buffer[BLOCK_SIZE];
152 char add_zone_ind_blk[BLOCK_SIZE];
153 char add_zone_dind_blk[BLOCK_SIZE];
154 IF_FEATURE_MINIX2(char add_zone_tind_blk[BLOCK_SIZE];)
155 char check_file_blk[BLOCK_SIZE];
158 char current_name[MAX_DEPTH * MINIX_NAME_MAX];
160 #define G (*ptr_to_globals)
161 #if ENABLE_FEATURE_MINIX2
162 #define version2 (G.version2 )
164 #define changed (G.changed )
165 #define errors_uncorrected (G.errors_uncorrected )
166 #define termios_set (G.termios_set )
167 #define dirsize (G.dirsize )
168 #define namelen (G.namelen )
169 #define device_name (G.device_name )
170 #define directory (G.directory )
171 #define regular (G.regular )
172 #define blockdev (G.blockdev )
173 #define chardev (G.chardev )
174 #define links (G.links )
175 #define symlinks (G.symlinks )
176 #define total (G.total )
177 #define inode_buffer (G.inode_buffer )
178 #define inode_map (G.inode_map )
179 #define zone_map (G.zone_map )
180 #define inode_count (G.inode_count )
181 #define zone_count (G.zone_count )
182 #define name_depth (G.name_depth )
183 #define name_component (G.name_component )
184 #define sv_termios (G.sv_termios )
185 #define superblock_buffer (G.superblock_buffer )
186 #define add_zone_ind_blk (G.add_zone_ind_blk )
187 #define add_zone_dind_blk (G.add_zone_dind_blk )
188 #define add_zone_tind_blk (G.add_zone_tind_blk )
189 #define check_file_blk (G.check_file_blk )
190 #define current_name (G.current_name )
191 #define INIT_G() do { \
192 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
195 current_name[0] = '/'; \
196 /*current_name[1] = '\0';*/ \
197 name_component[0] = ¤t_name[0]; \
201 #define OPTION_STR "larvsmf"
211 #define OPT_list (option_mask32 & OPT_l)
212 #define OPT_automatic (option_mask32 & OPT_a)
213 #define OPT_repair (option_mask32 & OPT_r)
214 #define OPT_verbose (option_mask32 & OPT_v)
215 #define OPT_show (option_mask32 & OPT_s)
216 #define OPT_warn_mode (option_mask32 & OPT_w)
217 #define OPT_force (option_mask32 & OPT_f)
218 /* non-automatic repairs requested? */
219 #define OPT_manual ((option_mask32 & (OPT_a|OPT_r)) == OPT_r)
222 #define Inode1 (((struct minix1_inode *) inode_buffer)-1)
223 #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
225 #define Super (*(struct minix_superblock *)(superblock_buffer))
227 #if ENABLE_FEATURE_MINIX2
228 # define ZONES ((unsigned)(version2 ? Super.s_zones : Super.s_nzones))
230 # define ZONES ((unsigned)(Super.s_nzones))
232 #define INODES ((unsigned)Super.s_ninodes)
233 #define IMAPS ((unsigned)Super.s_imap_blocks)
234 #define ZMAPS ((unsigned)Super.s_zmap_blocks)
235 #define FIRSTZONE ((unsigned)Super.s_firstdatazone)
236 #define ZONESIZE ((unsigned)Super.s_log_zone_size)
237 #define MAXSIZE ((unsigned)Super.s_max_size)
238 #define MAGIC (Super.s_magic)
240 /* gcc likes this more (code is smaller) than macro variant */
241 static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
243 return (size + n-1) / n;
246 #if !ENABLE_FEATURE_MINIX2
247 #define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK)
249 #define INODE_BLOCKS div_roundup(INODES, \
250 (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK))
253 #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
254 #define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS)
256 /* Before you ask "where they come from?": */
257 /* setbit/clrbit are supplied by sys/param.h */
259 static int minix_bit(const char *a, unsigned i)
261 return (a[i >> 3] & (1<<(i & 7)));
264 static void minix_setbit(char *a, unsigned i)
269 static void minix_clrbit(char *a, unsigned i)
275 /* Note: do not assume 0/1, it is 0/nonzero */
276 #define zone_in_use(x) (minix_bit(zone_map,(x)-FIRSTZONE+1))
277 #define inode_in_use(x) (minix_bit(inode_map,(x)))
279 #define mark_inode(x) (minix_setbit(inode_map,(x)))
280 #define unmark_inode(x) (minix_clrbit(inode_map,(x)))
282 #define mark_zone(x) (minix_setbit(zone_map,(x)-FIRSTZONE+1))
283 #define unmark_zone(x) (minix_clrbit(zone_map,(x)-FIRSTZONE+1))
286 static void recursive_check(unsigned ino);
287 #if ENABLE_FEATURE_MINIX2
288 static void recursive_check2(unsigned ino);
291 static void die(const char *str) NORETURN;
292 static void die(const char *str)
295 tcsetattr_stdin_TCSANOW(&sv_termios);
296 bb_error_msg_and_die("%s", str);
299 static void push_filename(const char *name)
303 // [0] [1] [2] <-name_component[i]
304 if (name_depth < MAX_DEPTH) {
306 char *p = name_component[name_depth];
308 len = sprintf(p, "%.*s", namelen, name);
309 name_component[name_depth + 1] = p + len;
314 static void pop_filename(void)
317 if (name_depth < MAX_DEPTH) {
318 *name_component[name_depth] = '\0';
320 current_name[0] = '/';
321 current_name[1] = '\0';
326 static int ask(const char *string, int def)
332 errors_uncorrected = 1;
338 errors_uncorrected = 1;
341 printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
347 errors_uncorrected = 1;
352 c |= 0x20; /* tolower */
366 errors_uncorrected = 1;
372 * Make certain that we aren't checking a filesystem that is on a
373 * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
374 * 1994 Theodore Ts'o. Also licensed under GPL.
376 static void check_mount(void)
378 if (find_mount_point(device_name, 0)) {
380 #if ENABLE_FEATURE_MTAB_SUPPORT
382 * If the root is mounted read-only, then /etc/mtab is
383 * probably not correct; so we won't issue a warning based on
386 int fd = open(bb_path_mtab_file, O_RDWR);
388 if (fd < 0 && errno == EROFS)
392 printf("%s is mounted. ", device_name);
394 if (isatty(0) && isatty(1))
395 cont = ask("Do you really want to continue", 0);
397 printf("Check aborted\n");
404 * check_zone_nr checks to see that *nr is a valid zone nr. If it
405 * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
406 * if an error was corrected, and returns the zone (0 for no zone
407 * or a bad zone-number).
409 static int check_zone_nr2(uint32_t *nr, smallint *corrected)
416 else if (*nr >= ZONES)
420 printf("Zone nr %s in file '%s'. ", msg, current_name);
421 if (ask("Remove block", 1)) {
428 static int check_zone_nr(uint16_t *nr, smallint *corrected)
431 int r = check_zone_nr2(&nr32, corrected);
432 *nr = (uint16_t)nr32;
437 * read-block reads block nr into the buffer at addr.
439 static void read_block(unsigned nr, void *addr)
442 memset(addr, 0, BLOCK_SIZE);
445 xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
446 if (BLOCK_SIZE != full_read(dev_fd, addr, BLOCK_SIZE)) {
447 printf("%s: bad block %u in file '%s'\n",
448 bb_msg_read_error, nr, current_name);
449 errors_uncorrected = 1;
450 memset(addr, 0, BLOCK_SIZE);
455 * write_block writes block nr to disk.
457 static void write_block(unsigned nr, void *addr)
461 if (nr < FIRSTZONE || nr >= ZONES) {
462 printf("Internal error: trying to write bad block\n"
463 "Write request ignored\n");
464 errors_uncorrected = 1;
467 xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
468 if (BLOCK_SIZE != full_write(dev_fd, addr, BLOCK_SIZE)) {
469 printf("%s: bad block %u in file '%s'\n",
470 bb_msg_write_error, nr, current_name);
471 errors_uncorrected = 1;
476 * map_block calculates the absolute block nr of a block in a file.
477 * It sets 'changed' if the inode has needed changing, and re-writes
478 * any indirect blocks with errors.
480 static int map_block(struct minix1_inode *inode, unsigned blknr)
482 uint16_t ind[BLOCK_SIZE >> 1];
487 return check_zone_nr(inode->i_zone + blknr, &changed);
490 block = check_zone_nr(inode->i_zone + 7, &changed);
494 block = check_zone_nr(inode->i_zone + 8, &changed);
495 read_block(block, ind); /* double indirect */
497 result = check_zone_nr(&ind[blknr / 512], &blk_chg);
499 write_block(block, ind);
502 read_block(block, ind);
504 result = check_zone_nr(&ind[blknr % 512], &blk_chg);
506 write_block(block, ind);
510 #if ENABLE_FEATURE_MINIX2
511 static int map_block2(struct minix2_inode *inode, unsigned blknr)
513 uint32_t ind[BLOCK_SIZE >> 2];
518 return check_zone_nr2(inode->i_zone + blknr, &changed);
521 block = check_zone_nr2(inode->i_zone + 7, &changed);
525 if (blknr < 256 * 256) {
526 block = check_zone_nr2(inode->i_zone + 8, &changed);
530 block = check_zone_nr2(inode->i_zone + 9, &changed);
531 read_block(block, ind); /* triple indirect */
533 result = check_zone_nr2(&ind[blknr / (256 * 256)], &blk_chg);
535 write_block(block, ind);
538 read_block(block, ind); /* double indirect */
540 result = check_zone_nr2(&ind[(blknr / 256) % 256], &blk_chg);
542 write_block(block, ind);
545 read_block(block, ind);
547 result = check_zone_nr2(&ind[blknr % 256], &blk_chg);
549 write_block(block, ind);
554 static void write_superblock(void)
557 * Set the state of the filesystem based on whether or not there
558 * are uncorrected errors. The filesystem valid flag is
559 * unconditionally set if we get this far.
561 Super.s_state |= MINIX_VALID_FS | MINIX_ERROR_FS;
562 if (!errors_uncorrected)
563 Super.s_state &= ~MINIX_ERROR_FS;
565 xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
566 if (BLOCK_SIZE != full_write(dev_fd, superblock_buffer, BLOCK_SIZE))
567 die("can't write superblock");
570 static void write_tables(void)
574 if (IMAPS * BLOCK_SIZE != write(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
575 die("can't write inode map");
576 if (ZMAPS * BLOCK_SIZE != write(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
577 die("can't write zone map");
578 if (INODE_BUFFER_SIZE != write(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
579 die("can't write inodes");
582 static void get_dirsize(void)
585 char blk[BLOCK_SIZE];
588 #if ENABLE_FEATURE_MINIX2
590 block = Inode2[MINIX_ROOT_INO].i_zone[0];
593 block = Inode1[MINIX_ROOT_INO].i_zone[0];
594 read_block(block, blk);
595 for (size = 16; size < BLOCK_SIZE; size <<= 1) {
596 if (strcmp(blk + size + 2, "..") == 0) {
605 static void read_superblock(void)
607 xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
608 if (BLOCK_SIZE != full_read(dev_fd, superblock_buffer, BLOCK_SIZE))
609 die("can't read superblock");
610 /* already initialized to:
615 if (MAGIC == MINIX1_SUPER_MAGIC) {
616 } else if (MAGIC == MINIX1_SUPER_MAGIC2) {
619 #if ENABLE_FEATURE_MINIX2
620 } else if (MAGIC == MINIX2_SUPER_MAGIC) {
622 } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
628 die("bad magic number in superblock");
629 if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
630 die("only 1k blocks/zones supported");
631 if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
632 die("bad s_imap_blocks field in superblock");
633 if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
634 die("bad s_zmap_blocks field in superblock");
637 static void read_tables(void)
639 inode_map = xzalloc(IMAPS * BLOCK_SIZE);
640 zone_map = xzalloc(ZMAPS * BLOCK_SIZE);
641 inode_buffer = xmalloc(INODE_BUFFER_SIZE);
642 inode_count = xmalloc(INODES + 1);
643 zone_count = xmalloc(ZONES);
644 if (IMAPS * BLOCK_SIZE != read(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
645 die("can't read inode map");
646 if (ZMAPS * BLOCK_SIZE != read(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
647 die("can't read zone map");
648 if (INODE_BUFFER_SIZE != read(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
649 die("can't read inodes");
650 if (NORM_FIRSTZONE != FIRSTZONE) {
651 printf("warning: firstzone!=norm_firstzone\n");
652 errors_uncorrected = 1;
658 "Firstdatazone=%u (%u)\n"
661 "Filesystem state=%u\n"
665 FIRSTZONE, NORM_FIRSTZONE,
666 BLOCK_SIZE << ZONESIZE,
673 static void get_inode_common(unsigned nr, uint16_t i_mode)
676 if (!inode_count[nr]) {
677 if (!inode_in_use(nr)) {
678 printf("Inode %d is marked as 'unused', but it is used "
679 "for file '%s'\n", nr, current_name);
681 if (ask("Mark as 'in use'", 1))
684 errors_uncorrected = 1;
689 else if (S_ISREG(i_mode))
691 else if (S_ISCHR(i_mode))
693 else if (S_ISBLK(i_mode))
695 else if (S_ISLNK(i_mode))
697 else if (S_ISSOCK(i_mode));
698 else if (S_ISFIFO(i_mode));
700 printf("%s has mode %05o\n", current_name, i_mode);
704 if (!++inode_count[nr]) {
705 printf("Warning: inode count too big\n");
707 errors_uncorrected = 1;
711 static struct minix1_inode *get_inode(unsigned nr)
713 struct minix1_inode *inode;
715 if (!nr || nr > INODES)
718 get_inode_common(nr, inode->i_mode);
722 #if ENABLE_FEATURE_MINIX2
723 static struct minix2_inode *get_inode2(unsigned nr)
725 struct minix2_inode *inode;
727 if (!nr || nr > INODES)
730 get_inode_common(nr, inode->i_mode);
735 static void check_root(void)
737 struct minix1_inode *inode = Inode1 + MINIX_ROOT_INO;
739 if (!inode || !S_ISDIR(inode->i_mode))
740 die("root inode isn't a directory");
743 #if ENABLE_FEATURE_MINIX2
744 static void check_root2(void)
746 struct minix2_inode *inode = Inode2 + MINIX_ROOT_INO;
748 if (!inode || !S_ISDIR(inode->i_mode))
749 die("root inode isn't a directory");
752 void check_root2(void);
755 static int add_zone_common(int block, smallint *corrected)
759 if (zone_count[block]) {
760 printf("Already used block is reused in file '%s'. ",
762 if (ask("Clear", 1)) {
765 return -1; /* "please zero out *znr" */
768 if (!zone_in_use(block)) {
769 printf("Block %d in file '%s' is marked as 'unused'. ",
770 block, current_name);
771 if (ask("Correct", 1))
774 if (!++zone_count[block])
779 static int add_zone(uint16_t *znr, smallint *corrected)
783 block = check_zone_nr(znr, corrected);
784 block = add_zone_common(block, corrected);
792 #if ENABLE_FEATURE_MINIX2
793 static int add_zone2(uint32_t *znr, smallint *corrected)
797 block = check_zone_nr2(znr, corrected);
798 block = add_zone_common(block, corrected);
807 static void add_zone_ind(uint16_t *znr, smallint *corrected)
811 smallint chg_blk = 0;
813 block = add_zone(znr, corrected);
816 read_block(block, add_zone_ind_blk);
817 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
818 add_zone(i + (uint16_t *) add_zone_ind_blk, &chg_blk);
820 write_block(block, add_zone_ind_blk);
823 #if ENABLE_FEATURE_MINIX2
824 static void add_zone_ind2(uint32_t *znr, smallint *corrected)
828 smallint chg_blk = 0;
830 block = add_zone2(znr, corrected);
833 read_block(block, add_zone_ind_blk);
834 for (i = 0; i < BLOCK_SIZE >> 2; i++)
835 add_zone2(i + (uint32_t *) add_zone_ind_blk, &chg_blk);
837 write_block(block, add_zone_ind_blk);
841 static void add_zone_dind(uint16_t *znr, smallint *corrected)
845 smallint chg_blk = 0;
847 block = add_zone(znr, corrected);
850 read_block(block, add_zone_dind_blk);
851 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
852 add_zone_ind(i + (uint16_t *) add_zone_dind_blk, &chg_blk);
854 write_block(block, add_zone_dind_blk);
857 #if ENABLE_FEATURE_MINIX2
858 static void add_zone_dind2(uint32_t *znr, smallint *corrected)
862 smallint chg_blk = 0;
864 block = add_zone2(znr, corrected);
867 read_block(block, add_zone_dind_blk);
868 for (i = 0; i < BLOCK_SIZE >> 2; i++)
869 add_zone_ind2(i + (uint32_t *) add_zone_dind_blk, &chg_blk);
871 write_block(block, add_zone_dind_blk);
874 static void add_zone_tind2(uint32_t *znr, smallint *corrected)
878 smallint chg_blk = 0;
880 block = add_zone2(znr, corrected);
883 read_block(block, add_zone_tind_blk);
884 for (i = 0; i < BLOCK_SIZE >> 2; i++)
885 add_zone_dind2(i + (uint32_t *) add_zone_tind_blk, &chg_blk);
887 write_block(block, add_zone_tind_blk);
891 static void check_zones(unsigned i)
893 struct minix1_inode *inode;
895 if (!i || i > INODES)
897 if (inode_count[i] > 1) /* have we counted this file already? */
900 if (!S_ISDIR(inode->i_mode)
901 && !S_ISREG(inode->i_mode)
902 && !S_ISLNK(inode->i_mode)
906 for (i = 0; i < 7; i++)
907 add_zone(i + inode->i_zone, &changed);
908 add_zone_ind(7 + inode->i_zone, &changed);
909 add_zone_dind(8 + inode->i_zone, &changed);
912 #if ENABLE_FEATURE_MINIX2
913 static void check_zones2(unsigned i)
915 struct minix2_inode *inode;
917 if (!i || i > INODES)
919 if (inode_count[i] > 1) /* have we counted this file already? */
922 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
923 && !S_ISLNK(inode->i_mode))
925 for (i = 0; i < 7; i++)
926 add_zone2(i + inode->i_zone, &changed);
927 add_zone_ind2(7 + inode->i_zone, &changed);
928 add_zone_dind2(8 + inode->i_zone, &changed);
929 add_zone_tind2(9 + inode->i_zone, &changed);
933 static void check_file(struct minix1_inode *dir, unsigned offset)
935 struct minix1_inode *inode;
940 block = map_block(dir, offset / BLOCK_SIZE);
941 read_block(block, check_file_blk);
942 name = check_file_blk + (offset % BLOCK_SIZE) + 2;
943 ino = *(uint16_t *) (name - 2);
945 printf("%s contains a bad inode number for file '%.*s'. ",
946 current_name, namelen, name);
947 if (ask("Remove", 1)) {
948 *(uint16_t *) (name - 2) = 0;
949 write_block(block, check_file_blk);
954 inode = get_inode(ino);
957 if (inode && LONE_CHAR(name, '.'))
959 printf("%s: bad directory: '.' isn't first\n", current_name);
960 errors_uncorrected = 1;
962 if (offset == dirsize) {
963 if (inode && strcmp("..", name) == 0)
965 printf("%s: bad directory: '..' isn't second\n", current_name);
966 errors_uncorrected = 1;
973 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
974 printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
977 if (inode && S_ISDIR(inode->i_mode))
978 recursive_check(ino);
982 #if ENABLE_FEATURE_MINIX2
983 static void check_file2(struct minix2_inode *dir, unsigned offset)
985 struct minix2_inode *inode;
990 block = map_block2(dir, offset / BLOCK_SIZE);
991 read_block(block, check_file_blk);
992 name = check_file_blk + (offset % BLOCK_SIZE) + 2;
993 ino = *(uint16_t *) (name - 2);
995 printf("%s contains a bad inode number for file '%.*s'. ",
996 current_name, namelen, name);
997 if (ask("Remove", 1)) {
998 *(uint16_t *) (name - 2) = 0;
999 write_block(block, check_file_blk);
1003 push_filename(name);
1004 inode = get_inode2(ino);
1007 if (inode && LONE_CHAR(name, '.'))
1009 printf("%s: bad directory: '.' isn't first\n", current_name);
1010 errors_uncorrected = 1;
1012 if (offset == dirsize) {
1013 if (inode && strcmp("..", name) == 0)
1015 printf("%s: bad directory: '..' isn't second\n", current_name);
1016 errors_uncorrected = 1;
1020 push_filename(name);
1023 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1024 printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
1027 if (inode && S_ISDIR(inode->i_mode))
1028 recursive_check2(ino);
1033 static void recursive_check(unsigned ino)
1035 struct minix1_inode *dir;
1039 if (!S_ISDIR(dir->i_mode))
1040 die("internal error");
1041 if (dir->i_size < 2 * dirsize) {
1042 printf("%s: bad directory: size<32", current_name);
1043 errors_uncorrected = 1;
1045 for (offset = 0; offset < dir->i_size; offset += dirsize)
1046 check_file(dir, offset);
1049 #if ENABLE_FEATURE_MINIX2
1050 static void recursive_check2(unsigned ino)
1052 struct minix2_inode *dir;
1056 if (!S_ISDIR(dir->i_mode))
1057 die("internal error");
1058 if (dir->i_size < 2 * dirsize) {
1059 printf("%s: bad directory: size<32", current_name);
1060 errors_uncorrected = 1;
1062 for (offset = 0; offset < dir->i_size; offset += dirsize)
1063 check_file2(dir, offset);
1067 static int bad_zone(int i)
1069 char buffer[BLOCK_SIZE];
1071 xlseek(dev_fd, BLOCK_SIZE * i, SEEK_SET);
1072 return (BLOCK_SIZE != full_read(dev_fd, buffer, BLOCK_SIZE));
1075 static void check_counts(void)
1079 for (i = 1; i <= INODES; i++) {
1080 if (OPT_warn_mode && Inode1[i].i_mode && !inode_in_use(i)) {
1081 printf("Inode %d has non-zero mode. ", i);
1082 if (ask("Clear", 1)) {
1083 Inode1[i].i_mode = 0;
1087 if (!inode_count[i]) {
1088 if (!inode_in_use(i))
1090 printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
1091 if (ask("Clear", 1))
1095 if (!inode_in_use(i)) {
1096 printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
1100 if (Inode1[i].i_nlinks != inode_count[i]) {
1101 printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
1102 i, Inode1[i].i_mode, Inode1[i].i_nlinks,
1104 if (ask("Set i_nlinks to count", 1)) {
1105 Inode1[i].i_nlinks = inode_count[i];
1110 for (i = FIRSTZONE; i < ZONES; i++) {
1111 if ((zone_in_use(i) != 0) == zone_count[i])
1113 if (!zone_count[i]) {
1116 printf("Zone %d is marked 'in use', but no file uses it. ", i);
1117 if (ask("Unmark", 1))
1121 printf("Zone %d: %sin use, counted=%d\n",
1122 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1126 #if ENABLE_FEATURE_MINIX2
1127 static void check_counts2(void)
1131 for (i = 1; i <= INODES; i++) {
1132 if (OPT_warn_mode && Inode2[i].i_mode && !inode_in_use(i)) {
1133 printf("Inode %d has non-zero mode. ", i);
1134 if (ask("Clear", 1)) {
1135 Inode2[i].i_mode = 0;
1139 if (!inode_count[i]) {
1140 if (!inode_in_use(i))
1142 printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
1143 if (ask("Clear", 1))
1147 if (!inode_in_use(i)) {
1148 printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
1152 if (Inode2[i].i_nlinks != inode_count[i]) {
1153 printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
1154 i, Inode2[i].i_mode, Inode2[i].i_nlinks,
1156 if (ask("Set i_nlinks to count", 1)) {
1157 Inode2[i].i_nlinks = inode_count[i];
1162 for (i = FIRSTZONE; i < ZONES; i++) {
1163 if ((zone_in_use(i) != 0) == zone_count[i])
1165 if (!zone_count[i]) {
1168 printf("Zone %d is marked 'in use', but no file uses it. ", i);
1169 if (ask("Unmark", 1))
1173 printf("Zone %d: %sin use, counted=%d\n",
1174 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1179 static void check(void)
1181 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1182 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1183 check_zones(MINIX_ROOT_INO);
1184 recursive_check(MINIX_ROOT_INO);
1188 #if ENABLE_FEATURE_MINIX2
1189 static void check2(void)
1191 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1192 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1193 check_zones2(MINIX_ROOT_INO);
1194 recursive_check2(MINIX_ROOT_INO);
1201 int fsck_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1202 int fsck_minix_main(int argc UNUSED_PARAM, char **argv)
1207 xfunc_error_retval = 8;
1211 opt_complementary = "=1:ar"; /* one argument; -a assumes -r */
1212 getopt32(argv, OPTION_STR);
1214 device_name = argv[0];
1216 check_mount(); /* trying to check a mounted filesystem? */
1218 if (!isatty(0) || !isatty(1))
1219 die("need terminal for interactive repairs");
1221 xmove_fd(xopen(device_name, OPT_repair ? O_RDWR : O_RDONLY), dev_fd);
1223 /*sync(); paranoia? */
1227 * Determine whether or not we should continue with the checking.
1228 * This is based on the status of the filesystem valid and error
1229 * flags and whether or not the -f switch was specified on the
1232 printf("%s: %s\n", applet_name, bb_banner);
1234 if (!(Super.s_state & MINIX_ERROR_FS)
1235 && (Super.s_state & MINIX_VALID_FS) && !OPT_force
1238 printf("%s is clean, check is skipped\n", device_name);
1240 } else if (OPT_force)
1241 printf("Forcing filesystem check on %s\n", device_name);
1242 else if (OPT_repair)
1243 printf("Filesystem on %s is dirty, needs checking\n",
1249 tcgetattr(0, &sv_termios);
1251 tmp.c_lflag &= ~(ICANON | ECHO);
1252 tcsetattr_stdin_TCSANOW(&tmp);
1267 for (i = 1, free_cnt = 0; i <= INODES; i++)
1268 if (!inode_in_use(i))
1270 printf("\n%6u inodes used (%u%%)\n", (INODES - free_cnt),
1271 100 * (INODES - free_cnt) / INODES);
1272 for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++)
1273 if (!zone_in_use(i))
1275 printf("%6u zones used (%u%%)\n\n"
1276 "%6u regular files\n"
1278 "%6u character device files\n"
1279 "%6u block device files\n"
1281 "%6u symbolic links\n"
1284 (ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES,
1285 regular, directory, chardev, blockdev,
1286 links - 2 * directory + 1, symlinks,
1287 total - 2 * directory + 1);
1291 printf("FILE SYSTEM HAS BEEN CHANGED\n");
1293 } else if (OPT_repair)
1297 tcsetattr_stdin_TCSANOW(&sv_termios);
1301 if (errors_uncorrected)