1 /* vi: set sw=4 ts=4: */
3 * fsck.c - a file system consistency checker for Linux.
5 * (C) 1991, 1992 Linus Torvalds. This file may be redistributed
6 * as per the GNU copyleft.
10 * 09.11.91 - made the first rudimentary functions
12 * 10.11.91 - updated, does checking, no repairs yet.
13 * Sent out to the mailing-list for testing.
15 * 14.11.91 - Testing seems to have gone well. Added some
16 * correction-code, and changed some functions.
18 * 15.11.91 - More correction code. Hopefully it notices most
19 * cases now, and tries to do something about them.
21 * 16.11.91 - More corrections (thanks to Mika Jalava). Most
22 * things seem to work now. Yeah, sure.
25 * 19.04.92 - Had to start over again from this old version, as a
26 * kernel bug ate my enhanced fsck in february.
28 * 28.02.93 - added support for different directory entry sizes..
30 * Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with
31 * super-block information
33 * Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform
34 * to that required by fsutil
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
42 * 30.10.94 - added support for v2 filesystem
43 * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
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)
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)
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)
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>.
63 * 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by
66 * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org>
67 * - added Native Language Support
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).
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 super-block info
82 * -m for minix-like "mode not cleared" warnings
83 * -f force filesystem check even if filesystem marked as valid
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 :-).
98 #include <sys/param.h>
101 #define BLOCK_SIZE_BITS 10
102 #define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
105 * This is the original minix inode layout on disk.
106 * Note the 8-bit gid and atime and ctime.
119 * The new minix inode has all the time entries, as well as
120 * long block numbers and a third indirect block (7+1+1+1
121 * instead of 7+1+1). Also, some previously 8-bit values are
122 * now 16-bit. The inode is now 64 bytes instead of 32.
124 struct minix2_inode {
138 MINIX_LINK_MAX = 250,
139 MINIX2_LINK_MAX = 65530,
141 MINIX_I_MAP_SLOTS = 8,
142 MINIX_Z_MAP_SLOTS = 64,
143 MINIX_SUPER_MAGIC = 0x137F, /* original minix fs */
144 MINIX_SUPER_MAGIC2 = 0x138F, /* minix fs, 30 char names */
145 MINIX2_SUPER_MAGIC = 0x2468, /* minix V2 fs */
146 MINIX2_SUPER_MAGIC2 = 0x2478, /* minix V2 fs, 30 char names */
147 MINIX_VALID_FS = 0x0001, /* Clean fs. */
148 MINIX_ERROR_FS = 0x0002, /* fs has errors. */
150 MINIX_INODES_PER_BLOCK = ((BLOCK_SIZE)/(sizeof (struct minix_inode))),
151 MINIX2_INODES_PER_BLOCK = ((BLOCK_SIZE)/(sizeof (struct minix2_inode))),
153 MINIX_V1 = 0x0001, /* original minix fs */
154 MINIX_V2 = 0x0002 /* minix V2 fs */
157 #define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version
160 * minix super-block data on disk
162 struct minix_super_block {
165 uint16_t s_imap_blocks;
166 uint16_t s_zmap_blocks;
167 uint16_t s_firstdatazone;
168 uint16_t s_log_zone_size;
175 struct minix_dir_entry {
181 #define NAME_MAX 255 /* # chars in a file name */
183 #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
186 #define BLKGETSIZE _IO(0x12,96) /* return device size */
193 enum { ROOT_INO = 1 };
195 #define UPPER(size,n) ((size+((n)-1))/(n))
196 #define INODE_SIZE (sizeof(struct minix_inode))
197 #ifdef CONFIG_FEATURE_MINIX2
198 #define INODE_SIZE2 (sizeof(struct minix2_inode))
199 #define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
200 : MINIX_INODES_PER_BLOCK))
202 #define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK))
204 #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
206 #define BITS_PER_BLOCK (BLOCK_SIZE<<3)
208 static char *program_version = "1.2 - 11/11/96";
209 static char *device_name;
211 static int repair, automatic, verbose, list, show, warn_mode, force;
212 static int directory, regular, blockdev, chardev, links, symlinks, total;
214 static int changed; /* flags if the filesystem has been changed */
215 static int errors_uncorrected; /* flag if some error was not corrected */
216 static int dirsize = 16;
217 static int namelen = 14;
219 static struct termios termios;
220 static int termios_set;
222 #define Inode (((struct minix_inode *) inode_buffer)-1)
223 #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
224 static char super_block_buffer[BLOCK_SIZE];
226 #define Super (*(struct minix_super_block *)super_block_buffer)
227 #define INODES ((unsigned long)Super.s_ninodes)
228 #ifdef CONFIG_FEATURE_MINIX2
229 #define ZONES ((unsigned long)(version2 ? Super.s_zones : Super.s_nzones))
231 #define ZONES ((unsigned long)(Super.s_nzones))
233 #define IMAPS ((unsigned long)Super.s_imap_blocks)
234 #define ZMAPS ((unsigned long)Super.s_zmap_blocks)
235 #define FIRSTZONE ((unsigned long)Super.s_firstdatazone)
236 #define ZONESIZE ((unsigned long)Super.s_log_zone_size)
237 #define MAXSIZE ((unsigned long)Super.s_max_size)
238 #define MAGIC (Super.s_magic)
239 #define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS)
241 static char *inode_map;
242 static char *zone_map;
244 static unsigned char *inode_count;
245 static unsigned char *zone_count;
247 static void recursive_check(unsigned int ino);
248 #ifdef CONFIG_FEATURE_MINIX2
249 static void recursive_check2(unsigned int ino);
252 static inline int bit(char * a,unsigned int i)
254 return (a[i >> 3] & (1<<(i & 7))) != 0;
256 #define inode_in_use(x) (bit(inode_map,(x)))
257 #define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1))
259 #define mark_inode(x) (setbit(inode_map,(x)),changed=1)
260 #define unmark_inode(x) (clrbit(inode_map,(x)),changed=1)
262 #define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1),changed=1)
263 #define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1),changed=1)
265 static void leave(int) ATTRIBUTE_NORETURN;
266 static void leave(int status)
269 tcsetattr(0, TCSANOW, &termios);
273 static void die(const char *str)
275 bb_error_msg("%s", str);
280 enum { MAX_DEPTH = 32 };
281 static int name_depth;
282 static char *current_name;
283 static char *name_component[MAX_DEPTH+1];
285 /* Wed Feb 9 15:17:06 MST 2000 */
286 /* dynamically allocate name_list (instead of making it static) */
287 static inline void alloc_current_name(void)
289 current_name = xmalloc(MAX_DEPTH * (BUFSIZ + 1));
290 current_name[0] = '/';
291 current_name[1] = '\0';
292 name_component[0] = ¤t_name[0];
295 #ifdef CONFIG_FEATURE_CLEAN_UP
296 /* execute this atexit() to deallocate name_list[] */
297 /* piptigger was here */
298 static inline void free_current_name(void)
304 static void push_filename(const char *name)
308 // [0] [1] [2] <-name_component[i]
309 if (name_depth < MAX_DEPTH) {
311 char *p = name_component[name_depth];
313 len = sprintf(p, "%.*s", namelen, name);
314 name_component[name_depth + 1] = p + len;
319 static void pop_filename(void) {
321 if (name_depth < MAX_DEPTH) {
322 *name_component[name_depth] = '\0';
324 current_name[0] = '/';
325 current_name[1] = '\0';
330 static int ask(const char *string, int def)
336 errors_uncorrected = 1;
342 errors_uncorrected = 1;
345 printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
348 if ((c = getchar()) == EOF) {
350 errors_uncorrected = 1;
357 } else if (c == 'N') {
360 } else if (c == ' ' || c == '\n')
367 errors_uncorrected = 1;
373 * Make certain that we aren't checking a filesystem that is on a
374 * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
375 * 1994 Theodore Ts'o. Also licensed under GPL.
377 static void check_mount(void)
384 if ((f = setmntent(MOUNTED, "r")) == NULL)
386 while ((mnt = getmntent(f)) != NULL)
387 if (strcmp(device_name, mnt->mnt_fsname) == 0)
394 * If the root is mounted read-only, then /etc/mtab is
395 * probably not correct; so we won't issue a warning based on
398 fd = open(MOUNTED, O_RDWR);
399 if (fd < 0 && errno == EROFS)
404 printf("%s is mounted. ", device_name);
406 if (isatty(0) && isatty(1))
407 cont = ask("Do you really want to continue", 0);
409 printf("Check aborted\n");
416 * check_zone_nr checks to see that *nr is a valid zone nr. If it
417 * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
418 * if an error was corrected, and returns the zone (0 for no zone
419 * or a bad zone-number).
421 static int check_zone_nr2(uint32_t *nr, int *corrected)
428 else if (*nr >= ZONES)
432 printf("Zone nr %s in file '%s'.", msg, current_name);
433 if (ask("Remove block", 1)) {
440 static int check_zone_nr(uint16_t *nr, int *corrected)
443 int r = check_zone_nr2(&nr32, corrected);
444 *nr = (uint16_t)nr32;
449 * read-block reads block nr into the buffer at addr.
451 static void read_block(unsigned int nr, char *addr)
454 memset(addr, 0, BLOCK_SIZE);
457 if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET)) {
458 printf("Read error: unable to seek to block in file '%s'\n",
460 errors_uncorrected = 1;
461 memset(addr, 0, BLOCK_SIZE);
462 } else if (BLOCK_SIZE != read(IN, addr, BLOCK_SIZE)) {
463 printf("Read error: bad block in file '%s'\n", current_name);
464 errors_uncorrected = 1;
465 memset(addr, 0, BLOCK_SIZE);
470 * write_block writes block nr to disk.
472 static void write_block(unsigned int nr, char *addr)
476 if (nr < FIRSTZONE || nr >= ZONES) {
477 printf("Internal error: trying to write bad block\n"
478 "Write request ignored\n");
479 errors_uncorrected = 1;
482 if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET))
483 die("seek failed in write_block");
484 if (BLOCK_SIZE != write(IN, addr, BLOCK_SIZE)) {
485 printf("Write error: bad block in file '%s'\n", current_name);
486 errors_uncorrected = 1;
491 * map_block calculates the absolute block nr of a block in a file.
492 * It sets 'changed' if the inode has needed changing, and re-writes
493 * any indirect blocks with errors.
495 static int map_block(struct minix_inode *inode, unsigned int blknr)
497 uint16_t ind[BLOCK_SIZE >> 1];
498 uint16_t dind[BLOCK_SIZE >> 1];
499 int blk_chg, block, result;
502 return check_zone_nr(inode->i_zone + blknr, &changed);
505 block = check_zone_nr(inode->i_zone + 7, &changed);
506 read_block(block, (char *) ind);
508 result = check_zone_nr(blknr + ind, &blk_chg);
510 write_block(block, (char *) ind);
514 block = check_zone_nr(inode->i_zone + 8, &changed);
515 read_block(block, (char *) dind);
517 result = check_zone_nr(dind + (blknr / 512), &blk_chg);
519 write_block(block, (char *) dind);
521 read_block(block, (char *) ind);
523 result = check_zone_nr(ind + (blknr % 512), &blk_chg);
525 write_block(block, (char *) ind);
529 #ifdef CONFIG_FEATURE_MINIX2
530 static int map_block2(struct minix2_inode *inode, unsigned int blknr)
532 uint32_t ind[BLOCK_SIZE >> 2];
533 uint32_t dind[BLOCK_SIZE >> 2];
534 uint32_t tind[BLOCK_SIZE >> 2];
535 int blk_chg, block, result;
538 return check_zone_nr2(inode->i_zone + blknr, &changed);
541 block = check_zone_nr2(inode->i_zone + 7, &changed);
542 read_block(block, (char *) ind);
544 result = check_zone_nr2(blknr + ind, &blk_chg);
546 write_block(block, (char *) ind);
550 if (blknr >= 256 * 256) {
551 block = check_zone_nr2(inode->i_zone + 8, &changed);
552 read_block(block, (char *) dind);
554 result = check_zone_nr2(dind + blknr / 256, &blk_chg);
556 write_block(block, (char *) dind);
558 read_block(block, (char *) ind);
560 result = check_zone_nr2(ind + blknr % 256, &blk_chg);
562 write_block(block, (char *) ind);
566 block = check_zone_nr2(inode->i_zone + 9, &changed);
567 read_block(block, (char *) tind);
569 result = check_zone_nr2(tind + blknr / (256 * 256), &blk_chg);
571 write_block(block, (char *) tind);
573 read_block(block, (char *) dind);
575 result = check_zone_nr2(dind + (blknr / 256) % 256, &blk_chg);
577 write_block(block, (char *) dind);
579 read_block(block, (char *) ind);
581 result = check_zone_nr2(ind + blknr % 256, &blk_chg);
583 write_block(block, (char *) ind);
588 static void write_super_block(void)
591 * Set the state of the filesystem based on whether or not there
592 * are uncorrected errors. The filesystem valid flag is
593 * unconditionally set if we get this far.
595 Super.s_state |= MINIX_VALID_FS;
596 if (errors_uncorrected)
597 Super.s_state |= MINIX_ERROR_FS;
599 Super.s_state &= ~MINIX_ERROR_FS;
601 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
602 die("seek failed in write_super_block");
603 if (BLOCK_SIZE != write(IN, super_block_buffer, BLOCK_SIZE))
604 die("unable to write super-block");
607 static void write_tables(void)
611 if (IMAPS * BLOCK_SIZE != write(IN, inode_map, IMAPS * BLOCK_SIZE))
612 die("Unable to write inode map");
613 if (ZMAPS * BLOCK_SIZE != write(IN, zone_map, ZMAPS * BLOCK_SIZE))
614 die("Unable to write zone map");
615 if (INODE_BUFFER_SIZE != write(IN, inode_buffer, INODE_BUFFER_SIZE))
616 die("Unable to write inodes");
619 static void get_dirsize(void)
622 char blk[BLOCK_SIZE];
625 #ifdef CONFIG_FEATURE_MINIX2
627 block = Inode2[ROOT_INO].i_zone[0];
630 block = Inode[ROOT_INO].i_zone[0];
631 read_block(block, blk);
632 for (size = 16; size < BLOCK_SIZE; size <<= 1) {
633 if (strcmp(blk + size + 2, "..") == 0) {
642 static void read_superblock(void)
644 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
646 if (BLOCK_SIZE != read(IN, super_block_buffer, BLOCK_SIZE))
647 die("unable to read super block");
648 /* already initialized to:
653 if (MAGIC == MINIX_SUPER_MAGIC) {
654 } else if (MAGIC == MINIX_SUPER_MAGIC2) {
657 #ifdef CONFIG_FEATURE_MINIX2
658 } else if (MAGIC == MINIX2_SUPER_MAGIC) {
660 } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
666 die("bad magic number in super-block");
667 if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
668 die("Only 1k blocks/zones supported");
669 if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
670 die("bad s_imap_blocks field in super-block");
671 if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
672 die("bad s_zmap_blocks field in super-block");
675 static void read_tables(void)
677 inode_map = xmalloc(IMAPS * BLOCK_SIZE);
678 zone_map = xmalloc(ZMAPS * BLOCK_SIZE);
679 memset(inode_map, 0, IMAPS * BLOCK_SIZE);
680 memset(zone_map, 0, ZMAPS * BLOCK_SIZE);
681 inode_buffer = xmalloc(INODE_BUFFER_SIZE);
682 inode_count = xmalloc(INODES + 1);
683 zone_count = xmalloc(ZONES);
684 if (IMAPS * BLOCK_SIZE != read(IN, inode_map, IMAPS * BLOCK_SIZE))
685 die("Unable to read inode map");
686 if (ZMAPS * BLOCK_SIZE != read(IN, zone_map, ZMAPS * BLOCK_SIZE))
687 die("Unable to read zone map");
688 if (INODE_BUFFER_SIZE != read(IN, inode_buffer, INODE_BUFFER_SIZE))
689 die("Unable to read inodes");
690 if (NORM_FIRSTZONE != FIRSTZONE) {
691 printf("Warning: Firstzone != Norm_firstzone\n");
692 errors_uncorrected = 1;
696 printf("%ld inodes\n"
698 "Firstdatazone=%ld (%ld)\n"
701 "Filesystem state=%d\n"
705 FIRSTZONE, NORM_FIRSTZONE,
706 BLOCK_SIZE << ZONESIZE,
713 static struct minix_inode *get_inode(unsigned int nr)
715 struct minix_inode *inode;
717 if (!nr || nr > INODES)
721 if (!inode_count[nr]) {
722 if (!inode_in_use(nr)) {
723 printf("Inode %d marked not used, but used for file "
724 "'%s'\n", nr, current_name);
726 if (ask("Mark in use", 1))
729 errors_uncorrected = 1;
732 if (S_ISDIR(inode->i_mode))
734 else if (S_ISREG(inode->i_mode))
736 else if (S_ISCHR(inode->i_mode))
738 else if (S_ISBLK(inode->i_mode))
740 else if (S_ISLNK(inode->i_mode))
742 else if (S_ISSOCK(inode->i_mode));
743 else if (S_ISFIFO(inode->i_mode));
745 printf("%s has mode %05o\n", current_name, inode->i_mode);
750 if (!++inode_count[nr]) {
751 printf("Warning: inode count too big\n");
753 errors_uncorrected = 1;
758 #ifdef CONFIG_FEATURE_MINIX2
759 static struct minix2_inode *get_inode2(unsigned int nr)
761 struct minix2_inode *inode;
763 if (!nr || nr > INODES)
767 if (!inode_count[nr]) {
768 if (!inode_in_use(nr)) {
769 printf("Inode %d marked not used, but used for file "
770 "'%s'\n", nr, current_name);
772 if (ask("Mark in use", 1))
775 errors_uncorrected = 1;
778 if (S_ISDIR(inode->i_mode))
780 else if (S_ISREG(inode->i_mode))
782 else if (S_ISCHR(inode->i_mode))
784 else if (S_ISBLK(inode->i_mode))
786 else if (S_ISLNK(inode->i_mode))
788 else if (S_ISSOCK(inode->i_mode));
789 else if (S_ISFIFO(inode->i_mode));
791 printf("%s has mode %05o\n", current_name, inode->i_mode);
795 if (!++inode_count[nr]) {
796 printf("Warning: inode count too big\n");
798 errors_uncorrected = 1;
804 static void check_root(void)
806 struct minix_inode *inode = Inode + ROOT_INO;
808 if (!inode || !S_ISDIR(inode->i_mode))
809 die("root inode isn't a directory");
812 #ifdef CONFIG_FEATURE_MINIX2
813 static void check_root2(void)
815 struct minix2_inode *inode = Inode2 + ROOT_INO;
817 if (!inode || !S_ISDIR(inode->i_mode))
818 die("root inode isn't a directory");
822 static int add_zone(uint16_t *znr, int *corrected)
828 block = check_zone_nr(znr, corrected);
831 if (zone_count[block]) {
832 printf("Block has been used before. Now in file '%s'.",
834 if (ask("Clear", 1)) {
841 if (!zone_in_use(block)) {
842 printf("Block %d in file '%s' is marked not in use.",
843 block, current_name);
844 if (ask("Correct", 1))
847 if (!++zone_count[block])
852 #ifdef CONFIG_FEATURE_MINIX2
853 static int add_zone2(uint32_t *znr, int *corrected)
859 block = check_zone_nr2(znr, corrected);
862 if (zone_count[block]) {
863 printf("Block has been used before. Now in file '%s'.",
865 if (ask("Clear", 1)) {
872 if (!zone_in_use(block)) {
873 printf("Block %d in file '%s' is marked not in use.",
874 block, current_name);
875 if (ask("Correct", 1))
878 if (!++zone_count[block])
884 static void add_zone_ind(uint16_t *znr, int *corrected)
886 static char blk[BLOCK_SIZE];
890 block = add_zone(znr, corrected);
893 read_block(block, blk);
894 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
895 add_zone(i + (uint16_t *) blk, &chg_blk);
897 write_block(block, blk);
900 #ifdef CONFIG_FEATURE_MINIX2
901 static void add_zone_ind2(uint32_t *znr, int *corrected)
903 static char blk[BLOCK_SIZE];
907 block = add_zone2(znr, corrected);
910 read_block(block, blk);
911 for (i = 0; i < BLOCK_SIZE >> 2; i++)
912 add_zone2(i + (uint32_t *) blk, &chg_blk);
914 write_block(block, blk);
918 static void add_zone_dind(uint16_t *znr, int *corrected)
920 static char blk[BLOCK_SIZE];
924 block = add_zone(znr, corrected);
927 read_block(block, blk);
928 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
929 add_zone_ind(i + (uint16_t *) blk, &blk_chg);
931 write_block(block, blk);
934 #ifdef CONFIG_FEATURE_MINIX2
935 static void add_zone_dind2(uint32_t *znr, int *corrected)
937 static char blk[BLOCK_SIZE];
941 block = add_zone2(znr, corrected);
944 read_block(block, blk);
945 for (i = 0; i < BLOCK_SIZE >> 2; i++)
946 add_zone_ind2(i + (uint32_t *) blk, &blk_chg);
948 write_block(block, blk);
951 static void add_zone_tind2(uint32_t *znr, int *corrected)
953 static char blk[BLOCK_SIZE];
957 block = add_zone2(znr, corrected);
960 read_block(block, blk);
961 for (i = 0; i < BLOCK_SIZE >> 2; i++)
962 add_zone_dind2(i + (uint32_t *) blk, &blk_chg);
964 write_block(block, blk);
968 static void check_zones(unsigned int i)
970 struct minix_inode *inode;
972 if (!i || i > INODES)
974 if (inode_count[i] > 1) /* have we counted this file already? */
977 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
978 !S_ISLNK(inode->i_mode)) return;
979 for (i = 0; i < 7; i++)
980 add_zone(i + inode->i_zone, &changed);
981 add_zone_ind(7 + inode->i_zone, &changed);
982 add_zone_dind(8 + inode->i_zone, &changed);
985 #ifdef CONFIG_FEATURE_MINIX2
986 static void check_zones2(unsigned int i)
988 struct minix2_inode *inode;
990 if (!i || i > INODES)
992 if (inode_count[i] > 1) /* have we counted this file already? */
995 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
996 && !S_ISLNK(inode->i_mode))
998 for (i = 0; i < 7; i++)
999 add_zone2(i + inode->i_zone, &changed);
1000 add_zone_ind2(7 + inode->i_zone, &changed);
1001 add_zone_dind2(8 + inode->i_zone, &changed);
1002 add_zone_tind2(9 + inode->i_zone, &changed);
1006 static void check_file(struct minix_inode *dir, unsigned int offset)
1008 static char blk[BLOCK_SIZE];
1009 struct minix_inode *inode;
1014 block = map_block(dir, offset / BLOCK_SIZE);
1015 read_block(block, blk);
1016 name = blk + (offset % BLOCK_SIZE) + 2;
1017 ino = *(uint16_t *) (name - 2);
1019 printf("%s contains a bad inode number for file '%.*s'.",
1020 current_name, namelen, name);
1021 if (ask(" Remove", 1)) {
1022 *(uint16_t *) (name - 2) = 0;
1023 write_block(block, blk);
1027 push_filename(name);
1028 inode = get_inode(ino);
1031 if (!inode || strcmp(".", name)) {
1032 printf("%s: bad directory: '.' isn't first\n", current_name);
1033 errors_uncorrected = 1;
1037 if (offset == dirsize) {
1038 if (!inode || strcmp("..", name)) {
1039 printf("%s: bad directory: '..' isn't second\n", current_name);
1040 errors_uncorrected = 1;
1046 push_filename(name);
1049 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1050 printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
1053 if (inode && S_ISDIR(inode->i_mode))
1054 recursive_check(ino);
1059 #ifdef CONFIG_FEATURE_MINIX2
1060 static void check_file2(struct minix2_inode *dir, unsigned int offset)
1062 static char blk[BLOCK_SIZE];
1063 struct minix2_inode *inode;
1068 block = map_block2(dir, offset / BLOCK_SIZE);
1069 read_block(block, blk);
1070 name = blk + (offset % BLOCK_SIZE) + 2;
1071 ino = *(uint16_t *) (name - 2);
1073 printf("%s contains a bad inode number for file '%.*s'.",
1074 current_name, namelen, name);
1075 if (ask(" Remove", 1)) {
1076 *(uint16_t *) (name - 2) = 0;
1077 write_block(block, blk);
1081 push_filename(name);
1082 inode = get_inode2(ino);
1085 if (!inode || strcmp(".", name)) {
1086 printf("%s: bad directory: '.' isn't first\n", current_name);
1087 errors_uncorrected = 1;
1091 if (offset == dirsize) {
1092 if (!inode || strcmp("..", name)) {
1093 printf("%s: bad directory: '..' isn't second\n", current_name);
1094 errors_uncorrected = 1;
1100 push_filename(name);
1103 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1104 printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
1107 if (inode && S_ISDIR(inode->i_mode))
1108 recursive_check2(ino);
1114 static void recursive_check(unsigned int ino)
1116 struct minix_inode *dir;
1117 unsigned int offset;
1120 if (!S_ISDIR(dir->i_mode))
1121 die("internal error");
1122 if (dir->i_size < 2 * dirsize) {
1123 printf("%s: bad directory: size<32", current_name);
1124 errors_uncorrected = 1;
1126 for (offset = 0; offset < dir->i_size; offset += dirsize)
1127 check_file(dir, offset);
1130 #ifdef CONFIG_FEATURE_MINIX2
1131 static void recursive_check2(unsigned int ino)
1133 struct minix2_inode *dir;
1134 unsigned int offset;
1137 if (!S_ISDIR(dir->i_mode))
1138 die("internal error");
1139 if (dir->i_size < 2 * dirsize) {
1140 printf("%s: bad directory: size<32", current_name);
1141 errors_uncorrected = 1;
1143 for (offset = 0; offset < dir->i_size; offset += dirsize)
1144 check_file2(dir, offset);
1148 static int bad_zone(int i)
1152 if (BLOCK_SIZE * i != lseek(IN, BLOCK_SIZE * i, SEEK_SET))
1153 die("seek failed in bad_zone");
1154 return (BLOCK_SIZE != read(IN, buffer, BLOCK_SIZE));
1157 static void check_counts(void)
1161 for (i = 1; i <= INODES; i++) {
1162 if (warn_mode && Inode[i].i_mode && !inode_in_use(i)) {
1163 printf("Inode %d mode not cleared.", i);
1164 if (ask("Clear", 1)) {
1165 Inode[i].i_mode = 0;
1169 if (!inode_count[i]) {
1170 if (!inode_in_use(i))
1172 printf("Inode %d not used, marked used in the bitmap.", i);
1173 if (ask("Clear", 1))
1177 if (!inode_in_use(i)) {
1178 printf("Inode %d used, marked unused in the bitmap.", i);
1182 if (Inode[i].i_nlinks != inode_count[i]) {
1183 printf("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.",
1184 i, Inode[i].i_mode, Inode[i].i_nlinks, inode_count[i]);
1185 if (ask("Set i_nlinks to count", 1)) {
1186 Inode[i].i_nlinks = inode_count[i];
1191 for (i = FIRSTZONE; i < ZONES; i++) {
1192 if (zone_in_use(i) == zone_count[i])
1194 if (!zone_count[i]) {
1197 printf("Zone %d: marked in use, no file uses it.", i);
1198 if (ask("Unmark", 1))
1202 printf("Zone %d: %sin use, counted=%d\n",
1203 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1207 #ifdef CONFIG_FEATURE_MINIX2
1208 static void check_counts2(void)
1212 for (i = 1; i <= INODES; i++) {
1213 if (warn_mode && Inode2[i].i_mode && !inode_in_use(i)) {
1214 printf("Inode %d mode not cleared.", i);
1215 if (ask("Clear", 1)) {
1216 Inode2[i].i_mode = 0;
1220 if (!inode_count[i]) {
1221 if (!inode_in_use(i))
1223 printf("Inode %d not used, marked used in the bitmap.", i);
1224 if (ask("Clear", 1))
1228 if (!inode_in_use(i)) {
1229 printf("Inode %d used, marked unused in the bitmap.", i);
1233 if (Inode2[i].i_nlinks != inode_count[i]) {
1234 printf("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.",
1235 i, Inode2[i].i_mode, Inode2[i].i_nlinks,
1237 if (ask("Set i_nlinks to count", 1)) {
1238 Inode2[i].i_nlinks = inode_count[i];
1243 for (i = FIRSTZONE; i < ZONES; i++) {
1244 if (zone_in_use(i) == zone_count[i])
1246 if (!zone_count[i]) {
1249 printf("Zone %d: marked in use, no file uses it.", i);
1250 if (ask("Unmark", 1))
1254 printf("Zone %d: %sin use, counted=%d\n",
1255 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1260 static void check(void)
1262 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1263 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1264 check_zones(ROOT_INO);
1265 recursive_check(ROOT_INO);
1269 #ifdef CONFIG_FEATURE_MINIX2
1270 static void check2(void)
1272 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1273 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1274 check_zones2(ROOT_INO);
1275 recursive_check2(ROOT_INO);
1280 int fsck_minix_main(int argc, char **argv)
1285 alloc_current_name();
1286 #ifdef CONFIG_FEATURE_CLEAN_UP
1287 /* Don't bother to free memory. Exit does
1288 * that automagically, so we can save a few bytes */
1289 atexit(free_current_name);
1292 if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
1293 die("bad inode size");
1294 #ifdef CONFIG_FEATURE_MINIX2
1295 if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
1296 die("bad v2 inode size");
1298 while (argc-- > 1) {
1300 if (argv[0][0] != '-') {
1304 device_name = argv[0];
1307 switch (argv[0][0]) {
1337 check_mount(); /* trying to check a mounted filesystem? */
1338 if (repair && !automatic) {
1339 if (!isatty(0) || !isatty(1))
1340 die("need terminal for interactive repairs");
1342 IN = open(device_name, repair ? O_RDWR : O_RDONLY);
1344 fprintf(stderr,"unable to open device '%s'\n",device_name);
1347 sync(); /* paranoia? */
1351 * Determine whether or not we should continue with the checking.
1352 * This is based on the status of the filesystem valid and error
1353 * flags and whether or not the -f switch was specified on the
1356 printf("%s, %s\n", bb_applet_name, program_version);
1357 if (!(Super.s_state & MINIX_ERROR_FS) &&
1358 (Super.s_state & MINIX_VALID_FS) && !force) {
1360 printf("%s is clean, no check\n", device_name);
1363 printf("Forcing filesystem check on %s\n", device_name);
1365 printf("Filesystem on %s is dirty, needs checking\n",
1370 if (repair && !automatic) {
1371 tcgetattr(0, &termios);
1373 tmp.c_lflag &= ~(ICANON | ECHO);
1374 tcsetattr(0, TCSANOW, &tmp);
1377 #ifdef CONFIG_FEATURE_MINIX2
1390 for (i = 1, free_cnt = 0; i <= INODES; i++)
1391 if (!inode_in_use(i))
1393 printf("\n%6ld inodes used (%ld%%)\n", (INODES - free_cnt),
1394 100 * (INODES - free_cnt) / INODES);
1395 for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++)
1396 if (!zone_in_use(i))
1398 printf("%6ld zones used (%ld%%)\n", (ZONES - free_cnt),
1399 100 * (ZONES - free_cnt) / ZONES);
1400 printf("\n%6d regular files\n"
1402 "%6d character device files\n"
1403 "%6d block device files\n"
1405 "%6d symbolic links\n"
1408 regular, directory, chardev, blockdev,
1409 links - 2 * directory + 1, symlinks,
1410 total - 2 * directory + 1);
1414 printf("----------------------------\n"
1415 "FILE SYSTEM HAS BEEN CHANGED\n"
1416 "----------------------------\n");
1419 write_super_block();
1421 if (repair && !automatic)
1422 tcsetattr(0, TCSANOW, &termios);
1426 if (errors_uncorrected)