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 rudimetary 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 systemindependent.
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 * Usuage: 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>
102 typedef unsigned char u8;
103 typedef unsigned short u16;
104 typedef unsigned int u32;
107 static const int MINIX_ROOT_INO = 1;
108 static const int MINIX_LINK_MAX = 250;
109 static const int MINIX2_LINK_MAX = 65530;
111 static const int MINIX_I_MAP_SLOTS = 8;
112 static const int MINIX_Z_MAP_SLOTS = 64;
113 static const int MINIX_SUPER_MAGIC = 0x137F; /* original minix fs */
114 static const int MINIX_SUPER_MAGIC2 = 0x138F; /* minix fs, 30 char names */
115 static const int MINIX2_SUPER_MAGIC = 0x2468; /* minix V2 fs */
116 static const int MINIX2_SUPER_MAGIC2 = 0x2478; /* minix V2 fs, 30 char names */
117 static const int MINIX_VALID_FS = 0x0001; /* Clean fs. */
118 static const int MINIX_ERROR_FS = 0x0002; /* fs has errors. */
120 #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
121 #define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode)))
123 static const int MINIX_V1 = 0x0001; /* original minix fs */
124 static const int MINIX_V2 = 0x0002; /* minix V2 fs */
126 #define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version
129 * This is the original minix inode layout on disk.
130 * Note the 8-bit gid and atime and ctime.
143 * The new minix inode has all the time entries, as well as
144 * long block numbers and a third indirect block (7+1+1+1
145 * instead of 7+1+1). Also, some previously 8-bit values are
146 * now 16-bit. The inode is now 64 bytes instead of 32.
148 struct minix2_inode {
161 * minix super-block data on disk
163 struct minix_super_block {
176 struct minix_dir_entry {
181 #define BLOCK_SIZE_BITS 10
182 #define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
184 #define NAME_MAX 255 /* # chars in a file name */
186 #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
189 #define BLKGETSIZE _IO(0x12,96) /* return device size */
196 static const int ROOT_INO = 1;
198 #define UPPER(size,n) ((size+((n)-1))/(n))
199 #define INODE_SIZE (sizeof(struct minix_inode))
200 #ifdef BB_FEATURE_MINIX2
201 #define INODE_SIZE2 (sizeof(struct minix2_inode))
202 #define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
203 : MINIX_INODES_PER_BLOCK))
205 #define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK))
207 #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
209 #define BITS_PER_BLOCK (BLOCK_SIZE<<3)
211 static char *program_version = "1.2 - 11/11/96";
212 static char *device_name = NULL;
214 static int repair = 0, automatic = 0, verbose = 0, list = 0, show =
215 0, warn_mode = 0, force = 0;
216 static int directory = 0, regular = 0, blockdev = 0, chardev = 0, links =
217 0, symlinks = 0, total = 0;
219 static int changed = 0; /* flags if the filesystem has been changed */
220 static int errors_uncorrected = 0; /* flag if some error was not corrected */
221 static int dirsize = 16;
222 static int namelen = 14;
223 static int version2 = 0;
224 static struct termios termios;
225 static int termios_set = 0;
228 static const int MAX_DEPTH = 32;
229 static int name_depth = 0;
230 // static char name_list[MAX_DEPTH][BUFSIZ + 1];
231 static char **name_list = NULL;
233 static char *inode_buffer = NULL;
235 #define Inode (((struct minix_inode *) inode_buffer)-1)
236 #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
237 static char super_block_buffer[BLOCK_SIZE];
239 #define Super (*(struct minix_super_block *)super_block_buffer)
240 #define INODES ((unsigned long)Super.s_ninodes)
241 #ifdef BB_FEATURE_MINIX2
242 #define ZONES ((unsigned long)(version2 ? Super.s_zones : Super.s_nzones))
244 #define ZONES ((unsigned long)(Super.s_nzones))
246 #define IMAPS ((unsigned long)Super.s_imap_blocks)
247 #define ZMAPS ((unsigned long)Super.s_zmap_blocks)
248 #define FIRSTZONE ((unsigned long)Super.s_firstdatazone)
249 #define ZONESIZE ((unsigned long)Super.s_log_zone_size)
250 #define MAXSIZE ((unsigned long)Super.s_max_size)
251 #define MAGIC (Super.s_magic)
252 #define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS)
254 static char *inode_map;
255 static char *zone_map;
257 static unsigned char *inode_count = NULL;
258 static unsigned char *zone_count = NULL;
260 static void recursive_check(unsigned int ino);
261 #ifdef BB_FEATURE_MINIX2
262 static void recursive_check2(unsigned int ino);
265 static inline int bit(char * a,unsigned int i)
267 return (a[i >> 3] & (1<<(i & 7))) != 0;
269 #define inode_in_use(x) (bit(inode_map,(x)))
270 #define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1))
272 #define mark_inode(x) (setbit(inode_map,(x)),changed=1)
273 #define unmark_inode(x) (clrbit(inode_map,(x)),changed=1)
275 #define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1),changed=1)
276 #define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1),changed=1)
278 static void leave(int) __attribute__ ((noreturn));
279 static void leave(int status)
282 tcsetattr(0, TCSANOW, &termios);
286 static void die(const char *str)
288 error_msg("%s", str);
293 * This simply goes through the file-name data and prints out the
296 static void print_current_name(void)
300 while (i < name_depth)
301 printf("/%.*s", namelen, name_list[i++]);
306 static int ask(const char *string, int def)
312 errors_uncorrected = 1;
318 errors_uncorrected = 1;
321 printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
324 if ((c = getchar()) == EOF) {
326 errors_uncorrected = 1;
333 } else if (c == 'N') {
336 } else if (c == ' ' || c == '\n')
343 errors_uncorrected = 1;
349 * Make certain that we aren't checking a filesystem that is on a
350 * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
351 * 1994 Theodore Ts'o. Also licensed under GPL.
353 static void check_mount(void)
360 if ((f = setmntent(MOUNTED, "r")) == NULL)
362 while ((mnt = getmntent(f)) != NULL)
363 if (strcmp(device_name, mnt->mnt_fsname) == 0)
370 * If the root is mounted read-only, then /etc/mtab is
371 * probably not correct; so we won't issue a warning based on
374 fd = open(MOUNTED, O_RDWR);
375 if (fd < 0 && errno == EROFS)
380 printf("%s is mounted. ", device_name);
381 if (isatty(0) && isatty(1))
382 cont = ask("Do you really want to continue", 0);
386 printf("check aborted.\n");
393 * check_zone_nr checks to see that *nr is a valid zone nr. If it
394 * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
395 * if an error was corrected, and returns the zone (0 for no zone
396 * or a bad zone-number).
398 static int check_zone_nr(unsigned short *nr, int *corrected)
403 printf("Zone nr < FIRSTZONE in file `");
404 else if (*nr >= ZONES)
405 printf("Zone nr >= ZONES in file `");
408 print_current_name();
410 if (ask("Remove block", 1)) {
417 #ifdef BB_FEATURE_MINIX2
418 static int check_zone_nr2(unsigned int *nr, int *corrected)
423 printf("Zone nr < FIRSTZONE in file `");
424 else if (*nr >= ZONES)
425 printf("Zone nr >= ZONES in file `");
428 print_current_name();
430 if (ask("Remove block", 1)) {
439 * read-block reads block nr into the buffer at addr.
441 static void read_block(unsigned int nr, char *addr)
444 memset(addr, 0, BLOCK_SIZE);
447 if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET)) {
448 printf("Read error: unable to seek to block in file '");
449 print_current_name();
451 memset(addr, 0, BLOCK_SIZE);
452 errors_uncorrected = 1;
453 } else if (BLOCK_SIZE != read(IN, addr, BLOCK_SIZE)) {
454 printf("Read error: bad block in file '");
455 print_current_name();
457 memset(addr, 0, BLOCK_SIZE);
458 errors_uncorrected = 1;
463 * write_block writes block nr to disk.
465 static void write_block(unsigned int nr, char *addr)
469 if (nr < FIRSTZONE || nr >= ZONES) {
470 printf("Internal error: trying to write bad block\n"
471 "Write request ignored\n");
472 errors_uncorrected = 1;
475 if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET))
476 die("seek failed in write_block");
477 if (BLOCK_SIZE != write(IN, addr, BLOCK_SIZE)) {
478 printf("Write error: bad block in file '");
479 print_current_name();
481 errors_uncorrected = 1;
486 * map-block calculates the absolute block nr of a block in a file.
487 * It sets 'changed' if the inode has needed changing, and re-writes
488 * any indirect blocks with errors.
490 static int map_block(struct minix_inode *inode, unsigned int blknr)
492 unsigned short ind[BLOCK_SIZE >> 1];
493 unsigned short dind[BLOCK_SIZE >> 1];
494 int blk_chg, block, result;
497 return check_zone_nr(inode->i_zone + blknr, &changed);
500 block = check_zone_nr(inode->i_zone + 7, &changed);
501 read_block(block, (char *) ind);
503 result = check_zone_nr(blknr + ind, &blk_chg);
505 write_block(block, (char *) ind);
509 block = check_zone_nr(inode->i_zone + 8, &changed);
510 read_block(block, (char *) dind);
512 result = check_zone_nr(dind + (blknr / 512), &blk_chg);
514 write_block(block, (char *) dind);
516 read_block(block, (char *) ind);
518 result = check_zone_nr(ind + (blknr % 512), &blk_chg);
520 write_block(block, (char *) ind);
524 #ifdef BB_FEATURE_MINIX2
525 static int map_block2(struct minix2_inode *inode, unsigned int blknr)
527 unsigned int ind[BLOCK_SIZE >> 2];
528 unsigned int dind[BLOCK_SIZE >> 2];
529 unsigned int tind[BLOCK_SIZE >> 2];
530 int blk_chg, block, result;
533 return check_zone_nr2(inode->i_zone + blknr, &changed);
536 block = check_zone_nr2(inode->i_zone + 7, &changed);
537 read_block(block, (char *) ind);
539 result = check_zone_nr2(blknr + ind, &blk_chg);
541 write_block(block, (char *) ind);
545 if (blknr >= 256 * 256) {
546 block = check_zone_nr2(inode->i_zone + 8, &changed);
547 read_block(block, (char *) dind);
549 result = check_zone_nr2(dind + blknr / 256, &blk_chg);
551 write_block(block, (char *) dind);
553 read_block(block, (char *) ind);
555 result = check_zone_nr2(ind + blknr % 256, &blk_chg);
557 write_block(block, (char *) ind);
561 block = check_zone_nr2(inode->i_zone + 9, &changed);
562 read_block(block, (char *) tind);
564 result = check_zone_nr2(tind + blknr / (256 * 256), &blk_chg);
566 write_block(block, (char *) tind);
568 read_block(block, (char *) dind);
570 result = check_zone_nr2(dind + (blknr / 256) % 256, &blk_chg);
572 write_block(block, (char *) dind);
574 read_block(block, (char *) ind);
576 result = check_zone_nr2(ind + blknr % 256, &blk_chg);
578 write_block(block, (char *) ind);
583 static void write_super_block(void)
586 * Set the state of the filesystem based on whether or not there
587 * are uncorrected errors. The filesystem valid flag is
588 * unconditionally set if we get this far.
590 Super.s_state |= MINIX_VALID_FS;
591 if (errors_uncorrected)
592 Super.s_state |= MINIX_ERROR_FS;
594 Super.s_state &= ~MINIX_ERROR_FS;
596 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
597 die("seek failed in write_super_block");
598 if (BLOCK_SIZE != write(IN, super_block_buffer, BLOCK_SIZE))
599 die("unable to write super-block");
604 static void write_tables(void)
608 if (IMAPS * BLOCK_SIZE != write(IN, inode_map, IMAPS * BLOCK_SIZE))
609 die("Unable to write inode map");
610 if (ZMAPS * BLOCK_SIZE != write(IN, zone_map, ZMAPS * BLOCK_SIZE))
611 die("Unable to write zone map");
612 if (INODE_BUFFER_SIZE != write(IN, inode_buffer, INODE_BUFFER_SIZE))
613 die("Unable to write inodes");
616 static void get_dirsize(void)
619 char blk[BLOCK_SIZE];
622 #ifdef BB_FEATURE_MINIX2
624 block = Inode2[ROOT_INO].i_zone[0];
627 block = Inode[ROOT_INO].i_zone[0];
628 read_block(block, blk);
629 for (size = 16; size < BLOCK_SIZE; size <<= 1) {
630 if (strcmp(blk + size + 2, "..") == 0) {
639 static void read_superblock(void)
641 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
643 if (BLOCK_SIZE != read(IN, super_block_buffer, BLOCK_SIZE))
644 die("unable to read super block");
645 if (MAGIC == MINIX_SUPER_MAGIC) {
649 } else if (MAGIC == MINIX_SUPER_MAGIC2) {
653 #ifdef BB_FEATURE_MINIX2
654 } else if (MAGIC == MINIX2_SUPER_MAGIC) {
658 } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
664 die("bad magic number in super-block");
665 if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
666 die("Only 1k blocks/zones supported");
667 if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
668 die("bad s_imap_blocks field in super-block");
669 if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
670 die("bad s_zmap_blocks field in super-block");
673 static void read_tables(void)
675 inode_map = xmalloc(IMAPS * BLOCK_SIZE);
676 zone_map = xmalloc(ZMAPS * BLOCK_SIZE);
677 memset(inode_map, 0, sizeof(inode_map));
678 memset(zone_map, 0, sizeof(zone_map));
679 inode_buffer = xmalloc(INODE_BUFFER_SIZE);
680 inode_count = xmalloc(INODES + 1);
681 zone_count = xmalloc(ZONES);
682 if (IMAPS * BLOCK_SIZE != read(IN, inode_map, IMAPS * BLOCK_SIZE))
683 die("Unable to read inode map");
684 if (ZMAPS * BLOCK_SIZE != read(IN, zone_map, ZMAPS * BLOCK_SIZE))
685 die("Unable to read zone map");
686 if (INODE_BUFFER_SIZE != read(IN, inode_buffer, INODE_BUFFER_SIZE))
687 die("Unable to read inodes");
688 if (NORM_FIRSTZONE != FIRSTZONE) {
689 printf("Warning: Firstzone != Norm_firstzone\n");
690 errors_uncorrected = 1;
694 printf("%ld inodes\n", INODES);
695 printf("%ld blocks\n", ZONES);
696 printf("Firstdatazone=%ld (%ld)\n", FIRSTZONE, NORM_FIRSTZONE);
697 printf("Zonesize=%d\n", BLOCK_SIZE << ZONESIZE);
698 printf("Maxsize=%ld\n", MAXSIZE);
699 printf("Filesystem state=%d\n", Super.s_state);
700 printf("namelen=%d\n\n", namelen);
704 static struct minix_inode *get_inode(unsigned int nr)
706 struct minix_inode *inode;
708 if (!nr || nr > INODES)
712 if (!inode_count[nr]) {
713 if (!inode_in_use(nr)) {
714 printf("Inode %d marked not used, but used for file '", nr);
715 print_current_name();
718 if (ask("Mark in use", 1))
721 errors_uncorrected = 1;
724 if (S_ISDIR(inode->i_mode))
726 else if (S_ISREG(inode->i_mode))
728 else if (S_ISCHR(inode->i_mode))
730 else if (S_ISBLK(inode->i_mode))
732 else if (S_ISLNK(inode->i_mode))
734 else if (S_ISSOCK(inode->i_mode));
735 else if (S_ISFIFO(inode->i_mode));
737 print_current_name();
738 printf(" has mode %05o\n", inode->i_mode);
743 if (!++inode_count[nr]) {
744 printf("Warning: inode count too big.\n");
746 errors_uncorrected = 1;
751 #ifdef BB_FEATURE_MINIX2
752 static struct minix2_inode *get_inode2(unsigned int nr)
754 struct minix2_inode *inode;
756 if (!nr || nr > INODES)
760 if (!inode_count[nr]) {
761 if (!inode_in_use(nr)) {
762 printf("Inode %d marked not used, but used for file '", nr);
763 print_current_name();
766 if (ask("Mark in use", 1))
769 errors_uncorrected = 1;
772 if (S_ISDIR(inode->i_mode))
774 else if (S_ISREG(inode->i_mode))
776 else if (S_ISCHR(inode->i_mode))
778 else if (S_ISBLK(inode->i_mode))
780 else if (S_ISLNK(inode->i_mode))
782 else if (S_ISSOCK(inode->i_mode));
783 else if (S_ISFIFO(inode->i_mode));
785 print_current_name();
786 printf(" has mode %05o\n", inode->i_mode);
790 if (!++inode_count[nr]) {
791 printf("Warning: inode count too big.\n");
793 errors_uncorrected = 1;
799 static void check_root(void)
801 struct minix_inode *inode = Inode + ROOT_INO;
803 if (!inode || !S_ISDIR(inode->i_mode))
804 die("root inode isn't a directory");
807 #ifdef BB_FEATURE_MINIX2
808 static void check_root2(void)
810 struct minix2_inode *inode = Inode2 + ROOT_INO;
812 if (!inode || !S_ISDIR(inode->i_mode))
813 die("root inode isn't a directory");
817 static int add_zone(unsigned short *znr, int *corrected)
823 block = check_zone_nr(znr, corrected);
826 if (zone_count[block]) {
827 printf("Block has been used before. Now in file `");
828 print_current_name();
830 if (ask("Clear", 1)) {
838 if (!zone_in_use(block)) {
839 printf("Block %d in file `", block);
840 print_current_name();
841 printf("' is marked not in use.");
842 if (ask("Correct", 1))
845 if (!++zone_count[block])
850 #ifdef BB_FEATURE_MINIX2
851 static int add_zone2(unsigned int *znr, int *corrected)
857 block = check_zone_nr2(znr, corrected);
860 if (zone_count[block]) {
861 printf("Block has been used before. Now in file `");
862 print_current_name();
864 if (ask("Clear", 1)) {
872 if (!zone_in_use(block)) {
873 printf("Block %d in file `", block);
874 print_current_name();
875 printf("' is marked not in use.");
876 if (ask("Correct", 1))
879 if (!++zone_count[block])
885 static void add_zone_ind(unsigned short *znr, int *corrected)
887 static char blk[BLOCK_SIZE];
891 block = add_zone(znr, corrected);
894 read_block(block, blk);
895 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
896 add_zone(i + (unsigned short *) blk, &chg_blk);
898 write_block(block, blk);
901 #ifdef BB_FEATURE_MINIX2
902 static void add_zone_ind2(unsigned int *znr, int *corrected)
904 static char blk[BLOCK_SIZE];
908 block = add_zone2(znr, corrected);
911 read_block(block, blk);
912 for (i = 0; i < BLOCK_SIZE >> 2; i++)
913 add_zone2(i + (unsigned int *) blk, &chg_blk);
915 write_block(block, blk);
919 static void add_zone_dind(unsigned short *znr, int *corrected)
921 static char blk[BLOCK_SIZE];
925 block = add_zone(znr, corrected);
928 read_block(block, blk);
929 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
930 add_zone_ind(i + (unsigned short *) blk, &blk_chg);
932 write_block(block, blk);
935 #ifdef BB_FEATURE_MINIX2
936 static void add_zone_dind2(unsigned int *znr, int *corrected)
938 static char blk[BLOCK_SIZE];
942 block = add_zone2(znr, corrected);
945 read_block(block, blk);
946 for (i = 0; i < BLOCK_SIZE >> 2; i++)
947 add_zone_ind2(i + (unsigned int *) blk, &blk_chg);
949 write_block(block, blk);
952 static void add_zone_tind2(unsigned int *znr, int *corrected)
954 static char blk[BLOCK_SIZE];
958 block = add_zone2(znr, corrected);
961 read_block(block, blk);
962 for (i = 0; i < BLOCK_SIZE >> 2; i++)
963 add_zone_dind2(i + (unsigned int *) blk, &blk_chg);
965 write_block(block, blk);
969 static void check_zones(unsigned int i)
971 struct minix_inode *inode;
973 if (!i || i > INODES)
975 if (inode_count[i] > 1) /* have we counted this file already? */
978 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
979 !S_ISLNK(inode->i_mode)) return;
980 for (i = 0; i < 7; i++)
981 add_zone(i + inode->i_zone, &changed);
982 add_zone_ind(7 + inode->i_zone, &changed);
983 add_zone_dind(8 + inode->i_zone, &changed);
986 #ifdef BB_FEATURE_MINIX2
987 static void check_zones2(unsigned int i)
989 struct minix2_inode *inode;
991 if (!i || i > INODES)
993 if (inode_count[i] > 1) /* have we counted this file already? */
996 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
997 && !S_ISLNK(inode->i_mode))
999 for (i = 0; i < 7; i++)
1000 add_zone2(i + inode->i_zone, &changed);
1001 add_zone_ind2(7 + inode->i_zone, &changed);
1002 add_zone_dind2(8 + inode->i_zone, &changed);
1003 add_zone_tind2(9 + inode->i_zone, &changed);
1007 static void check_file(struct minix_inode *dir, unsigned int offset)
1009 static char blk[BLOCK_SIZE];
1010 struct minix_inode *inode;
1015 block = map_block(dir, offset / BLOCK_SIZE);
1016 read_block(block, blk);
1017 name = blk + (offset % BLOCK_SIZE) + 2;
1018 ino = *(unsigned short *) (name - 2);
1020 print_current_name();
1021 printf(" contains a bad inode number for file '");
1022 printf("%.*s'.", namelen, name);
1023 if (ask(" Remove", 1)) {
1024 *(unsigned short *) (name - 2) = 0;
1025 write_block(block, blk);
1029 if (name_depth < MAX_DEPTH)
1030 strncpy(name_list[name_depth], name, namelen);
1032 inode = get_inode(ino);
1035 if (!inode || strcmp(".", name)) {
1036 print_current_name();
1037 printf(": bad directory: '.' isn't first\n");
1038 errors_uncorrected = 1;
1042 if (offset == dirsize) {
1043 if (!inode || strcmp("..", name)) {
1044 print_current_name();
1045 printf(": bad directory: '..' isn't second\n");
1046 errors_uncorrected = 1;
1052 if (name_depth < MAX_DEPTH)
1053 strncpy(name_list[name_depth], name, namelen);
1057 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1058 print_current_name();
1059 if (S_ISDIR(inode->i_mode))
1065 if (inode && S_ISDIR(inode->i_mode))
1066 recursive_check(ino);
1071 #ifdef BB_FEATURE_MINIX2
1072 static void check_file2(struct minix2_inode *dir, unsigned int offset)
1074 static char blk[BLOCK_SIZE];
1075 struct minix2_inode *inode;
1080 block = map_block2(dir, offset / BLOCK_SIZE);
1081 read_block(block, blk);
1082 name = blk + (offset % BLOCK_SIZE) + 2;
1083 ino = *(unsigned short *) (name - 2);
1085 print_current_name();
1086 printf(" contains a bad inode number for file '");
1087 printf("%.*s'.", namelen, name);
1088 if (ask(" Remove", 1)) {
1089 *(unsigned short *) (name - 2) = 0;
1090 write_block(block, blk);
1094 if (name_depth < MAX_DEPTH)
1095 strncpy(name_list[name_depth], name, namelen);
1097 inode = get_inode2(ino);
1100 if (!inode || strcmp(".", name)) {
1101 print_current_name();
1102 printf(": bad directory: '.' isn't first\n");
1103 errors_uncorrected = 1;
1107 if (offset == dirsize) {
1108 if (!inode || strcmp("..", name)) {
1109 print_current_name();
1110 printf(": bad directory: '..' isn't second\n");
1111 errors_uncorrected = 1;
1120 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1121 print_current_name();
1122 if (S_ISDIR(inode->i_mode))
1128 if (inode && S_ISDIR(inode->i_mode))
1129 recursive_check2(ino);
1135 static void recursive_check(unsigned int ino)
1137 struct minix_inode *dir;
1138 unsigned int offset;
1141 if (!S_ISDIR(dir->i_mode))
1142 die("internal error");
1143 if (dir->i_size < 2 * dirsize) {
1144 print_current_name();
1145 printf(": bad directory: size<32");
1146 errors_uncorrected = 1;
1148 for (offset = 0; offset < dir->i_size; offset += dirsize)
1149 check_file(dir, offset);
1152 #ifdef BB_FEATURE_MINIX2
1153 static void recursive_check2(unsigned int ino)
1155 struct minix2_inode *dir;
1156 unsigned int offset;
1159 if (!S_ISDIR(dir->i_mode))
1160 die("internal error");
1161 if (dir->i_size < 2 * dirsize) {
1162 print_current_name();
1163 printf(": bad directory: size < 32");
1164 errors_uncorrected = 1;
1166 for (offset = 0; offset < dir->i_size; offset += dirsize)
1167 check_file2(dir, offset);
1171 static int bad_zone(int i)
1175 if (BLOCK_SIZE * i != lseek(IN, BLOCK_SIZE * i, SEEK_SET))
1176 die("seek failed in bad_zone");
1177 return (BLOCK_SIZE != read(IN, buffer, BLOCK_SIZE));
1180 static void check_counts(void)
1184 for (i = 1; i <= INODES; i++) {
1185 if (!inode_in_use(i) && Inode[i].i_mode && warn_mode) {
1186 printf("Inode %d mode not cleared.", i);
1187 if (ask("Clear", 1)) {
1188 Inode[i].i_mode = 0;
1192 if (!inode_count[i]) {
1193 if (!inode_in_use(i))
1195 printf("Inode %d not used, marked used in the bitmap.", i);
1196 if (ask("Clear", 1))
1200 if (!inode_in_use(i)) {
1201 printf("Inode %d used, marked unused in the bitmap.", i);
1205 if (Inode[i].i_nlinks != inode_count[i]) {
1206 printf("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.",
1207 i, Inode[i].i_mode, Inode[i].i_nlinks, inode_count[i]);
1208 if (ask("Set i_nlinks to count", 1)) {
1209 Inode[i].i_nlinks = inode_count[i];
1214 for (i = FIRSTZONE; i < ZONES; i++) {
1215 if (zone_in_use(i) == zone_count[i])
1217 if (!zone_count[i]) {
1220 printf("Zone %d: marked in use, no file uses it.", i);
1221 if (ask("Unmark", 1))
1225 printf("Zone %d: %sin use, counted=%d\n",
1226 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1230 #ifdef BB_FEATURE_MINIX2
1231 static void check_counts2(void)
1235 for (i = 1; i <= INODES; i++) {
1236 if (!inode_in_use(i) && Inode2[i].i_mode && warn_mode) {
1237 printf("Inode %d mode not cleared.", i);
1238 if (ask("Clear", 1)) {
1239 Inode2[i].i_mode = 0;
1243 if (!inode_count[i]) {
1244 if (!inode_in_use(i))
1246 printf("Inode %d not used, marked used in the bitmap.", i);
1247 if (ask("Clear", 1))
1251 if (!inode_in_use(i)) {
1252 printf("Inode %d used, marked unused in the bitmap.", i);
1256 if (Inode2[i].i_nlinks != inode_count[i]) {
1257 printf("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.",
1258 i, Inode2[i].i_mode, Inode2[i].i_nlinks,
1260 if (ask("Set i_nlinks to count", 1)) {
1261 Inode2[i].i_nlinks = inode_count[i];
1266 for (i = FIRSTZONE; i < ZONES; i++) {
1267 if (zone_in_use(i) == zone_count[i])
1269 if (!zone_count[i]) {
1272 printf("Zone %d: marked in use, no file uses it.", i);
1273 if (ask("Unmark", 1))
1277 printf("Zone %d: %sin use, counted=%d\n",
1278 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1283 static void check(void)
1285 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1286 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1287 check_zones(ROOT_INO);
1288 recursive_check(ROOT_INO);
1292 #ifdef BB_FEATURE_MINIX2
1293 static void check2(void)
1295 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1296 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1297 check_zones2(ROOT_INO);
1298 recursive_check2(ROOT_INO);
1303 /* Wed Feb 9 15:17:06 MST 2000 */
1304 /* dynamically allocate name_list (instead of making it static) */
1305 static void alloc_name_list(void)
1309 name_list = xmalloc(sizeof(char *) * MAX_DEPTH);
1310 for (i = 0; i < MAX_DEPTH; i++)
1311 name_list[i] = xmalloc(sizeof(char) * BUFSIZ + 1);
1314 #ifdef BB_FEATURE_CLEAN_UP
1315 /* execute this atexit() to deallocate name_list[] */
1316 /* piptigger was here */
1317 static void free_name_list(void)
1322 for (i = 0; i < MAX_DEPTH; i++) {
1332 extern int fsck_minix_main(int argc, char **argv)
1339 #ifdef BB_FEATURE_CLEAN_UP
1340 /* Don't bother to free memory. Exit does
1341 * that automagically, so we can save a few bytes */
1342 atexit(free_name_list);
1345 if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
1346 die("bad inode size");
1347 #ifdef BB_FEATURE_MINIX2
1348 if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
1349 die("bad v2 inode size");
1351 while (argc-- > 1) {
1353 if (argv[0][0] != '-') {
1357 device_name = argv[0];
1360 switch (argv[0][0]) {
1390 check_mount(); /* trying to check a mounted filesystem? */
1391 if (repair && !automatic) {
1392 if (!isatty(0) || !isatty(1))
1393 die("need terminal for interactive repairs");
1395 IN = open(device_name, repair ? O_RDWR : O_RDONLY);
1397 fprintf(stderr,"unable to open device '%s'.\n",device_name);
1400 for (count = 0; count < 3; count++)
1405 * Determine whether or not we should continue with the checking.
1406 * This is based on the status of the filesystem valid and error
1407 * flags and whether or not the -f switch was specified on the
1410 printf("%s, %s\n", applet_name, program_version);
1411 if (!(Super.s_state & MINIX_ERROR_FS) &&
1412 (Super.s_state & MINIX_VALID_FS) && !force) {
1414 printf("%s is clean, no check.\n", device_name);
1417 printf("Forcing filesystem check on %s.\n", device_name);
1419 printf("Filesystem on %s is dirty, needs checking.\n",
1424 if (repair && !automatic) {
1425 tcgetattr(0, &termios);
1427 tmp.c_lflag &= ~(ICANON | ECHO);
1428 tcsetattr(0, TCSANOW, &tmp);
1431 #ifdef BB_FEATURE_MINIX2
1444 for (i = 1, free_cnt = 0; i <= INODES; i++)
1445 if (!inode_in_use(i))
1447 printf("\n%6ld inodes used (%ld%%)\n", (INODES - free_cnt),
1448 100 * (INODES - free_cnt) / INODES);
1449 for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++)
1450 if (!zone_in_use(i))
1452 printf("%6ld zones used (%ld%%)\n", (ZONES - free_cnt),
1453 100 * (ZONES - free_cnt) / ZONES);
1454 printf("\n%6d regular files\n"
1456 "%6d character device files\n"
1457 "%6d block device files\n"
1459 "%6d symbolic links\n"
1462 regular, directory, chardev, blockdev,
1463 links - 2 * directory + 1, symlinks,
1464 total - 2 * directory + 1);
1468 printf("----------------------------\n"
1469 "FILE SYSTEM HAS BEEN CHANGED\n"
1470 "----------------------------\n");
1471 for (count = 0; count < 3; count++)
1474 write_super_block();
1476 if (repair && !automatic)
1477 tcsetattr(0, TCSANOW, &termios);
1481 if (errors_uncorrected)