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 :-).
100 #include <sys/param.h>
103 typedef unsigned char u8;
104 typedef unsigned short u16;
105 typedef unsigned int u32;
108 #define MINIX_ROOT_INO 1
109 #define MINIX_LINK_MAX 250
110 #define MINIX2_LINK_MAX 65530
112 #define MINIX_I_MAP_SLOTS 8
113 #define MINIX_Z_MAP_SLOTS 64
114 #define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
115 #define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
116 #define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */
117 #define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */
118 #define MINIX_VALID_FS 0x0001 /* Clean fs. */
119 #define MINIX_ERROR_FS 0x0002 /* fs has errors. */
121 #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
122 #define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode)))
124 #define MINIX_V1 0x0001 /* original minix fs */
125 #define MINIX_V2 0x0002 /* minix V2 fs */
127 #define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version
130 * This is the original minix inode layout on disk.
131 * Note the 8-bit gid and atime and ctime.
144 * The new minix inode has all the time entries, as well as
145 * long block numbers and a third indirect block (7+1+1+1
146 * instead of 7+1+1). Also, some previously 8-bit values are
147 * now 16-bit. The inode is now 64 bytes instead of 32.
149 struct minix2_inode {
162 * minix super-block data on disk
164 struct minix_super_block {
177 struct minix_dir_entry {
182 #define BLOCK_SIZE_BITS 10
183 #define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
185 #define NAME_MAX 255 /* # chars in a file name */
187 #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
189 #define MINIX_VALID_FS 0x0001 /* Clean fs. */
190 #define MINIX_ERROR_FS 0x0002 /* fs has errors. */
192 #define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
193 #define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
196 #define BLKGETSIZE _IO(0x12,96) /* return device size */
199 #ifdef MINIX2_SUPER_MAGIC2
200 #define HAVE_MINIX2 1
209 #define UPPER(size,n) ((size+((n)-1))/(n))
210 #define INODE_SIZE (sizeof(struct minix_inode))
212 #define INODE_SIZE2 (sizeof(struct minix2_inode))
213 #define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
214 : MINIX_INODES_PER_BLOCK))
216 #define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK))
218 #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
220 #define BITS_PER_BLOCK (BLOCK_SIZE<<3)
222 static char *program_version = "1.2 - 11/11/96";
223 static char *device_name = NULL;
225 static int repair = 0, automatic = 0, verbose = 0, list = 0, show =
226 0, warn_mode = 0, force = 0;
227 static int directory = 0, regular = 0, blockdev = 0, chardev = 0, links =
228 0, symlinks = 0, total = 0;
230 static int changed = 0; /* flags if the filesystem has been changed */
231 static int errors_uncorrected = 0; /* flag if some error was not corrected */
232 static int dirsize = 16;
233 static int namelen = 14;
234 static int version2 = 0;
235 static struct termios termios;
236 static int termios_set = 0;
240 static int name_depth = 0;
241 // static char name_list[MAX_DEPTH][BUFSIZ + 1];
242 static char **name_list = NULL;
244 static char *inode_buffer = NULL;
246 #define Inode (((struct minix_inode *) inode_buffer)-1)
247 #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
248 static char super_block_buffer[BLOCK_SIZE];
250 #define Super (*(struct minix_super_block *)super_block_buffer)
251 #define INODES ((unsigned long)Super.s_ninodes)
253 #define ZONES ((unsigned long)(version2 ? Super.s_zones : Super.s_nzones))
255 #define ZONES ((unsigned long)(Super.s_nzones))
257 #define IMAPS ((unsigned long)Super.s_imap_blocks)
258 #define ZMAPS ((unsigned long)Super.s_zmap_blocks)
259 #define FIRSTZONE ((unsigned long)Super.s_firstdatazone)
260 #define ZONESIZE ((unsigned long)Super.s_log_zone_size)
261 #define MAXSIZE ((unsigned long)Super.s_max_size)
262 #define MAGIC (Super.s_magic)
263 #define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS)
265 static char *inode_map;
266 static char *zone_map;
268 static unsigned char *inode_count = NULL;
269 static unsigned char *zone_count = NULL;
271 static void recursive_check(unsigned int ino);
272 static void recursive_check2(unsigned int ino);
274 #define inode_in_use(x) (isset(inode_map,(x)))
275 #define zone_in_use(x) (isset(zone_map,(x)-FIRSTZONE+1))
277 #define mark_inode(x) (setbit(inode_map,(x)),changed=1)
278 #define unmark_inode(x) (clrbit(inode_map,(x)),changed=1)
280 #define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1),changed=1)
281 #define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1),changed=1)
283 static void leave(int) __attribute__ ((noreturn));
284 static void leave(int status)
287 tcsetattr(0, TCSANOW, &termios);
291 static void show_usage(void)
293 fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n",
295 fprintf(stderr, "Usage: %s [-larvsmf] /dev/name\n", applet_name);
296 #ifndef BB_FEATURE_TRIVIAL_HELP
298 "\nPerforms a consistency check for MINIX filesystems.\n\n");
299 fprintf(stderr, "Options:\n");
300 fprintf(stderr, "\t-l\tLists all filenames\n");
301 fprintf(stderr, "\t-r\tPerform interactive repairs\n");
302 fprintf(stderr, "\t-a\tPerform automatic repairs\n");
303 fprintf(stderr, "\t-v\tverbose\n");
304 fprintf(stderr, "\t-s\tOutputs super-block information\n");
306 "\t-m\tActivates MINIX-like \"mode not cleared\" warnings\n");
307 fprintf(stderr, "\t-f\tForce file system check.\n\n");
312 static void die(const char *str)
314 errorMsg("%s\n", str);
319 * This simply goes through the file-name data and prints out the
322 static void print_current_name(void)
326 while (i < name_depth)
327 printf("/%.*s", namelen, name_list[i++]);
332 static int ask(const char *string, int def)
338 errors_uncorrected = 1;
344 errors_uncorrected = 1;
347 printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
350 if ((c = getchar()) == EOF) {
352 errors_uncorrected = 1;
359 } else if (c == 'N') {
362 } else if (c == ' ' || c == '\n')
369 errors_uncorrected = 1;
375 * Make certain that we aren't checking a filesystem that is on a
376 * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
377 * 1994 Theodore Ts'o. Also licensed under GPL.
379 static void check_mount(void)
386 if ((f = setmntent(MOUNTED, "r")) == NULL)
388 while ((mnt = getmntent(f)) != NULL)
389 if (strcmp(device_name, mnt->mnt_fsname) == 0)
396 * If the root is mounted read-only, then /etc/mtab is
397 * probably not correct; so we won't issue a warning based on
400 fd = open(MOUNTED, O_RDWR);
401 if (fd < 0 && errno == EROFS)
406 printf("%s is mounted. ", device_name);
407 if (isatty(0) && isatty(1))
408 cont = ask("Do you really want to continue", 0);
412 printf("check aborted.\n");
419 * check_zone_nr checks to see that *nr is a valid zone nr. If it
420 * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
421 * if an error was corrected, and returns the zone (0 for no zone
422 * or a bad zone-number).
424 static int check_zone_nr(unsigned short *nr, int *corrected)
429 printf("Zone nr < FIRSTZONE in file `");
430 else if (*nr >= ZONES)
431 printf("Zone nr >= ZONES in file `");
434 print_current_name();
436 if (ask("Remove block", 1)) {
444 static int check_zone_nr2(unsigned int *nr, int *corrected)
449 printf("Zone nr < FIRSTZONE in file `");
450 else if (*nr >= ZONES)
451 printf("Zone nr >= ZONES in file `");
454 print_current_name();
456 if (ask("Remove block", 1)) {
465 * read-block reads block nr into the buffer at addr.
467 static void read_block(unsigned int nr, char *addr)
470 memset(addr, 0, BLOCK_SIZE);
473 if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET)) {
474 printf("Read error: unable to seek to block in file '");
475 print_current_name();
477 memset(addr, 0, BLOCK_SIZE);
478 errors_uncorrected = 1;
479 } else if (BLOCK_SIZE != read(IN, addr, BLOCK_SIZE)) {
480 printf("Read error: bad block in file '");
481 print_current_name();
483 memset(addr, 0, BLOCK_SIZE);
484 errors_uncorrected = 1;
489 * write_block writes block nr to disk.
491 static void write_block(unsigned int nr, char *addr)
495 if (nr < FIRSTZONE || nr >= ZONES) {
496 printf("Internal error: trying to write bad block\n"
497 "Write request ignored\n");
498 errors_uncorrected = 1;
501 if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET))
502 die("seek failed in write_block");
503 if (BLOCK_SIZE != write(IN, addr, BLOCK_SIZE)) {
504 printf("Write error: bad block in file '");
505 print_current_name();
507 errors_uncorrected = 1;
512 * map-block calculates the absolute block nr of a block in a file.
513 * It sets 'changed' if the inode has needed changing, and re-writes
514 * any indirect blocks with errors.
516 static int map_block(struct minix_inode *inode, unsigned int blknr)
518 unsigned short ind[BLOCK_SIZE >> 1];
519 unsigned short dind[BLOCK_SIZE >> 1];
520 int blk_chg, block, result;
523 return check_zone_nr(inode->i_zone + blknr, &changed);
526 block = check_zone_nr(inode->i_zone + 7, &changed);
527 read_block(block, (char *) ind);
529 result = check_zone_nr(blknr + ind, &blk_chg);
531 write_block(block, (char *) ind);
535 block = check_zone_nr(inode->i_zone + 8, &changed);
536 read_block(block, (char *) dind);
538 result = check_zone_nr(dind + (blknr / 512), &blk_chg);
540 write_block(block, (char *) dind);
542 read_block(block, (char *) ind);
544 result = check_zone_nr(ind + (blknr % 512), &blk_chg);
546 write_block(block, (char *) ind);
551 static int map_block2(struct minix2_inode *inode, unsigned int blknr)
553 unsigned int ind[BLOCK_SIZE >> 2];
554 unsigned int dind[BLOCK_SIZE >> 2];
555 unsigned int tind[BLOCK_SIZE >> 2];
556 int blk_chg, block, result;
559 return check_zone_nr2(inode->i_zone + blknr, &changed);
562 block = check_zone_nr2(inode->i_zone + 7, &changed);
563 read_block(block, (char *) ind);
565 result = check_zone_nr2(blknr + ind, &blk_chg);
567 write_block(block, (char *) ind);
571 if (blknr >= 256 * 256) {
572 block = check_zone_nr2(inode->i_zone + 8, &changed);
573 read_block(block, (char *) dind);
575 result = check_zone_nr2(dind + blknr / 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);
587 block = check_zone_nr2(inode->i_zone + 9, &changed);
588 read_block(block, (char *) tind);
590 result = check_zone_nr2(tind + blknr / (256 * 256), &blk_chg);
592 write_block(block, (char *) tind);
594 read_block(block, (char *) dind);
596 result = check_zone_nr2(dind + (blknr / 256) % 256, &blk_chg);
598 write_block(block, (char *) dind);
600 read_block(block, (char *) ind);
602 result = check_zone_nr2(ind + blknr % 256, &blk_chg);
604 write_block(block, (char *) ind);
609 static void write_super_block(void)
612 * Set the state of the filesystem based on whether or not there
613 * are uncorrected errors. The filesystem valid flag is
614 * unconditionally set if we get this far.
616 Super.s_state |= MINIX_VALID_FS;
617 if (errors_uncorrected)
618 Super.s_state |= MINIX_ERROR_FS;
620 Super.s_state &= ~MINIX_ERROR_FS;
622 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
623 die("seek failed in write_super_block");
624 if (BLOCK_SIZE != write(IN, super_block_buffer, BLOCK_SIZE))
625 die("unable to write super-block");
630 static void write_tables(void)
634 if (IMAPS * BLOCK_SIZE != write(IN, inode_map, IMAPS * BLOCK_SIZE))
635 die("Unable to write inode map");
636 if (ZMAPS * BLOCK_SIZE != write(IN, zone_map, ZMAPS * BLOCK_SIZE))
637 die("Unable to write zone map");
638 if (INODE_BUFFER_SIZE != write(IN, inode_buffer, INODE_BUFFER_SIZE))
639 die("Unable to write inodes");
642 static void get_dirsize(void)
645 char blk[BLOCK_SIZE];
650 block = Inode2[ROOT_INO].i_zone[0];
653 block = Inode[ROOT_INO].i_zone[0];
654 read_block(block, blk);
655 for (size = 16; size < BLOCK_SIZE; size <<= 1) {
656 if (strcmp(blk + size + 2, "..") == 0) {
665 static void read_superblock(void)
667 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
669 if (BLOCK_SIZE != read(IN, super_block_buffer, BLOCK_SIZE))
670 die("unable to read super block");
671 if (MAGIC == MINIX_SUPER_MAGIC) {
675 } else if (MAGIC == MINIX_SUPER_MAGIC2) {
680 } else if (MAGIC == MINIX2_SUPER_MAGIC) {
684 } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
690 die("bad magic number in super-block");
691 if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
692 die("Only 1k blocks/zones supported");
693 if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
694 die("bad s_imap_blocks field in super-block");
695 if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
696 die("bad s_zmap_blocks field in super-block");
699 static void read_tables(void)
701 inode_map = xmalloc(IMAPS * BLOCK_SIZE);
702 zone_map = xmalloc(ZMAPS * BLOCK_SIZE);
703 memset(inode_map, 0, sizeof(inode_map));
704 memset(zone_map, 0, sizeof(zone_map));
705 inode_buffer = xmalloc(INODE_BUFFER_SIZE);
706 inode_count = xmalloc(INODES + 1);
707 zone_count = xmalloc(ZONES);
708 if (IMAPS * BLOCK_SIZE != read(IN, inode_map, IMAPS * BLOCK_SIZE))
709 die("Unable to read inode map");
710 if (ZMAPS * BLOCK_SIZE != read(IN, zone_map, ZMAPS * BLOCK_SIZE))
711 die("Unable to read zone map");
712 if (INODE_BUFFER_SIZE != read(IN, inode_buffer, INODE_BUFFER_SIZE))
713 die("Unable to read inodes");
714 if (NORM_FIRSTZONE != FIRSTZONE) {
715 printf("Warning: Firstzone != Norm_firstzone\n");
716 errors_uncorrected = 1;
720 printf("%ld inodes\n", INODES);
721 printf("%ld blocks\n", ZONES);
722 printf("Firstdatazone=%ld (%ld)\n", FIRSTZONE, NORM_FIRSTZONE);
723 printf("Zonesize=%d\n", BLOCK_SIZE << ZONESIZE);
724 printf("Maxsize=%ld\n", MAXSIZE);
725 printf("Filesystem state=%d\n", Super.s_state);
726 printf("namelen=%d\n\n", namelen);
730 struct minix_inode *get_inode(unsigned int nr)
732 struct minix_inode *inode;
734 if (!nr || nr > INODES)
738 if (!inode_count[nr]) {
739 if (!inode_in_use(nr)) {
740 printf("Inode %d marked not used, but used for file '", nr);
741 print_current_name();
744 if (ask("Mark in use", 1))
747 errors_uncorrected = 1;
750 if (S_ISDIR(inode->i_mode))
752 else if (S_ISREG(inode->i_mode))
754 else if (S_ISCHR(inode->i_mode))
756 else if (S_ISBLK(inode->i_mode))
758 else if (S_ISLNK(inode->i_mode))
760 else if (S_ISSOCK(inode->i_mode));
761 else if (S_ISFIFO(inode->i_mode));
763 print_current_name();
764 printf(" has mode %05o\n", inode->i_mode);
769 if (!++inode_count[nr]) {
770 printf("Warning: inode count too big.\n");
772 errors_uncorrected = 1;
778 struct minix2_inode *get_inode2(unsigned int nr)
780 struct minix2_inode *inode;
782 if (!nr || nr > INODES)
786 if (!inode_count[nr]) {
787 if (!inode_in_use(nr)) {
788 printf("Inode %d marked not used, but used for file '", nr);
789 print_current_name();
792 if (ask("Mark in use", 1))
795 errors_uncorrected = 1;
798 if (S_ISDIR(inode->i_mode))
800 else if (S_ISREG(inode->i_mode))
802 else if (S_ISCHR(inode->i_mode))
804 else if (S_ISBLK(inode->i_mode))
806 else if (S_ISLNK(inode->i_mode))
808 else if (S_ISSOCK(inode->i_mode));
809 else if (S_ISFIFO(inode->i_mode));
811 print_current_name();
812 printf(" has mode %05o\n", inode->i_mode);
816 if (!++inode_count[nr]) {
817 printf("Warning: inode count too big.\n");
819 errors_uncorrected = 1;
825 static void check_root(void)
827 struct minix_inode *inode = Inode + ROOT_INO;
829 if (!inode || !S_ISDIR(inode->i_mode))
830 die("root inode isn't a directory");
834 static void check_root2(void)
836 struct minix2_inode *inode = Inode2 + ROOT_INO;
838 if (!inode || !S_ISDIR(inode->i_mode))
839 die("root inode isn't a directory");
843 static int add_zone(unsigned short *znr, int *corrected)
849 block = check_zone_nr(znr, corrected);
852 if (zone_count[block]) {
853 printf("Block has been used before. Now in file `");
854 print_current_name();
856 if (ask("Clear", 1)) {
864 if (!zone_in_use(block)) {
865 printf("Block %d in file `", block);
866 print_current_name();
867 printf("' is marked not in use.");
868 if (ask("Correct", 1))
871 if (!++zone_count[block])
877 static int add_zone2(unsigned int *znr, int *corrected)
883 block = check_zone_nr2(znr, corrected);
886 if (zone_count[block]) {
887 printf("Block has been used before. Now in file `");
888 print_current_name();
890 if (ask("Clear", 1)) {
898 if (!zone_in_use(block)) {
899 printf("Block %d in file `", block);
900 print_current_name();
901 printf("' is marked not in use.");
902 if (ask("Correct", 1))
905 if (!++zone_count[block])
911 static void add_zone_ind(unsigned short *znr, int *corrected)
913 static char blk[BLOCK_SIZE];
917 block = add_zone(znr, corrected);
920 read_block(block, blk);
921 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
922 add_zone(i + (unsigned short *) blk, &chg_blk);
924 write_block(block, blk);
928 static void add_zone_ind2(unsigned int *znr, int *corrected)
930 static char blk[BLOCK_SIZE];
934 block = add_zone2(znr, corrected);
937 read_block(block, blk);
938 for (i = 0; i < BLOCK_SIZE >> 2; i++)
939 add_zone2(i + (unsigned int *) blk, &chg_blk);
941 write_block(block, blk);
945 static void add_zone_dind(unsigned short *znr, int *corrected)
947 static char blk[BLOCK_SIZE];
951 block = add_zone(znr, corrected);
954 read_block(block, blk);
955 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
956 add_zone_ind(i + (unsigned short *) blk, &blk_chg);
958 write_block(block, blk);
962 static void add_zone_dind2(unsigned int *znr, int *corrected)
964 static char blk[BLOCK_SIZE];
968 block = add_zone2(znr, corrected);
971 read_block(block, blk);
972 for (i = 0; i < BLOCK_SIZE >> 2; i++)
973 add_zone_ind2(i + (unsigned int *) blk, &blk_chg);
975 write_block(block, blk);
978 static void add_zone_tind2(unsigned int *znr, int *corrected)
980 static char blk[BLOCK_SIZE];
984 block = add_zone2(znr, corrected);
987 read_block(block, blk);
988 for (i = 0; i < BLOCK_SIZE >> 2; i++)
989 add_zone_dind2(i + (unsigned int *) blk, &blk_chg);
991 write_block(block, blk);
995 static void check_zones(unsigned int i)
997 struct minix_inode *inode;
999 if (!i || i > INODES)
1001 if (inode_count[i] > 1) /* have we counted this file already? */
1004 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
1005 !S_ISLNK(inode->i_mode)) return;
1006 for (i = 0; i < 7; i++)
1007 add_zone(i + inode->i_zone, &changed);
1008 add_zone_ind(7 + inode->i_zone, &changed);
1009 add_zone_dind(8 + inode->i_zone, &changed);
1013 static void check_zones2(unsigned int i)
1015 struct minix2_inode *inode;
1017 if (!i || i > INODES)
1019 if (inode_count[i] > 1) /* have we counted this file already? */
1022 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
1023 && !S_ISLNK(inode->i_mode))
1025 for (i = 0; i < 7; i++)
1026 add_zone2(i + inode->i_zone, &changed);
1027 add_zone_ind2(7 + inode->i_zone, &changed);
1028 add_zone_dind2(8 + inode->i_zone, &changed);
1029 add_zone_tind2(9 + inode->i_zone, &changed);
1033 static void check_file(struct minix_inode *dir, unsigned int offset)
1035 static char blk[BLOCK_SIZE];
1036 struct minix_inode *inode;
1041 block = map_block(dir, offset / BLOCK_SIZE);
1042 read_block(block, blk);
1043 name = blk + (offset % BLOCK_SIZE) + 2;
1044 ino = *(unsigned short *) (name - 2);
1046 print_current_name();
1047 printf(" contains a bad inode number for file '");
1048 printf("%.*s'.", namelen, name);
1049 if (ask(" Remove", 1)) {
1050 *(unsigned short *) (name - 2) = 0;
1051 write_block(block, blk);
1055 if (name_depth < MAX_DEPTH)
1056 strncpy(name_list[name_depth], name, namelen);
1058 inode = get_inode(ino);
1061 if (!inode || strcmp(".", name)) {
1062 print_current_name();
1063 printf(": bad directory: '.' isn't first\n");
1064 errors_uncorrected = 1;
1068 if (offset == dirsize) {
1069 if (!inode || strcmp("..", name)) {
1070 print_current_name();
1071 printf(": bad directory: '..' isn't second\n");
1072 errors_uncorrected = 1;
1078 if (name_depth < MAX_DEPTH)
1079 strncpy(name_list[name_depth], name, namelen);
1083 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1084 print_current_name();
1085 if (S_ISDIR(inode->i_mode))
1091 if (inode && S_ISDIR(inode->i_mode))
1092 recursive_check(ino);
1098 static void check_file2(struct minix2_inode *dir, unsigned int offset)
1100 static char blk[BLOCK_SIZE];
1101 struct minix2_inode *inode;
1106 block = map_block2(dir, offset / BLOCK_SIZE);
1107 read_block(block, blk);
1108 name = blk + (offset % BLOCK_SIZE) + 2;
1109 ino = *(unsigned short *) (name - 2);
1111 print_current_name();
1112 printf(" contains a bad inode number for file '");
1113 printf("%.*s'.", namelen, name);
1114 if (ask(" Remove", 1)) {
1115 *(unsigned short *) (name - 2) = 0;
1116 write_block(block, blk);
1120 if (name_depth < MAX_DEPTH)
1121 strncpy(name_list[name_depth], name, namelen);
1123 inode = get_inode2(ino);
1126 if (!inode || strcmp(".", name)) {
1127 print_current_name();
1128 printf(": bad directory: '.' isn't first\n");
1129 errors_uncorrected = 1;
1133 if (offset == dirsize) {
1134 if (!inode || strcmp("..", name)) {
1135 print_current_name();
1136 printf(": bad directory: '..' isn't second\n");
1137 errors_uncorrected = 1;
1146 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1147 print_current_name();
1148 if (S_ISDIR(inode->i_mode))
1154 if (inode && S_ISDIR(inode->i_mode))
1155 recursive_check2(ino);
1161 static void recursive_check(unsigned int ino)
1163 struct minix_inode *dir;
1164 unsigned int offset;
1167 if (!S_ISDIR(dir->i_mode))
1168 die("internal error");
1169 if (dir->i_size < 2 * dirsize) {
1170 print_current_name();
1171 printf(": bad directory: size<32");
1172 errors_uncorrected = 1;
1174 for (offset = 0; offset < dir->i_size; offset += dirsize)
1175 check_file(dir, offset);
1179 static void recursive_check2(unsigned int ino)
1181 struct minix2_inode *dir;
1182 unsigned int offset;
1185 if (!S_ISDIR(dir->i_mode))
1186 die("internal error");
1187 if (dir->i_size < 2 * dirsize) {
1188 print_current_name();
1189 printf(": bad directory: size < 32");
1190 errors_uncorrected = 1;
1192 for (offset = 0; offset < dir->i_size; offset += dirsize)
1193 check_file2(dir, offset);
1197 static int bad_zone(int i)
1201 if (BLOCK_SIZE * i != lseek(IN, BLOCK_SIZE * i, SEEK_SET))
1202 die("seek failed in bad_zone");
1203 return (BLOCK_SIZE != read(IN, buffer, BLOCK_SIZE));
1206 static void check_counts(void)
1210 for (i = 1; i <= INODES; i++) {
1211 if (!inode_in_use(i) && Inode[i].i_mode && warn_mode) {
1212 printf("Inode %d mode not cleared.", i);
1213 if (ask("Clear", 1)) {
1214 Inode[i].i_mode = 0;
1218 if (!inode_count[i]) {
1219 if (!inode_in_use(i))
1221 printf("Inode %d not used, marked used in the bitmap.", i);
1222 if (ask("Clear", 1))
1226 if (!inode_in_use(i)) {
1227 printf("Inode %d used, marked unused in the bitmap.", i);
1231 if (Inode[i].i_nlinks != inode_count[i]) {
1232 printf("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.",
1233 i, Inode[i].i_mode, Inode[i].i_nlinks, inode_count[i]);
1234 if (ask("Set i_nlinks to count", 1)) {
1235 Inode[i].i_nlinks = inode_count[i];
1240 for (i = FIRSTZONE; i < ZONES; i++) {
1241 if (zone_in_use(i) == zone_count[i])
1243 if (!zone_count[i]) {
1246 printf("Zone %d: marked in use, no file uses it.", i);
1247 if (ask("Unmark", 1))
1251 printf("Zone %d: %sin use, counted=%d\n",
1252 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1257 static void check_counts2(void)
1261 for (i = 1; i <= INODES; i++) {
1262 if (!inode_in_use(i) && Inode2[i].i_mode && warn_mode) {
1263 printf("Inode %d mode not cleared.", i);
1264 if (ask("Clear", 1)) {
1265 Inode2[i].i_mode = 0;
1269 if (!inode_count[i]) {
1270 if (!inode_in_use(i))
1272 printf("Inode %d not used, marked used in the bitmap.", i);
1273 if (ask("Clear", 1))
1277 if (!inode_in_use(i)) {
1278 printf("Inode %d used, marked unused in the bitmap.", i);
1282 if (Inode2[i].i_nlinks != inode_count[i]) {
1283 printf("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.",
1284 i, Inode2[i].i_mode, Inode2[i].i_nlinks,
1286 if (ask("Set i_nlinks to count", 1)) {
1287 Inode2[i].i_nlinks = inode_count[i];
1292 for (i = FIRSTZONE; i < ZONES; i++) {
1293 if (zone_in_use(i) == zone_count[i])
1295 if (!zone_count[i]) {
1298 printf("Zone %d: marked in use, no file uses it.", i);
1299 if (ask("Unmark", 1))
1303 printf("Zone %d: %sin use, counted=%d\n",
1304 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1309 static void check(void)
1311 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1312 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1313 check_zones(ROOT_INO);
1314 recursive_check(ROOT_INO);
1319 static void check2(void)
1321 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1322 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1323 check_zones2(ROOT_INO);
1324 recursive_check2(ROOT_INO);
1329 /* Wed Feb 9 15:17:06 MST 2000 */
1330 /* dynamically allocate name_list (instead of making it static) */
1331 static void alloc_name_list(void)
1335 name_list = xmalloc(sizeof(char *) * MAX_DEPTH);
1336 for (i = 0; i < MAX_DEPTH; i++)
1337 name_list[i] = xmalloc(sizeof(char) * BUFSIZ + 1);
1341 /* execute this atexit() to deallocate name_list[] */
1342 /* piptigger was here */
1343 static void free_name_list(void)
1348 for (i = 0; i < MAX_DEPTH; i++) {
1358 extern int fsck_minix_main(int argc, char **argv)
1365 /* Don't bother to free memory. Exit does
1366 * that automagically, so we can save a few bytes */
1367 //atexit(free_name_list);
1369 if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
1370 die("bad inode size");
1372 if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
1373 die("bad v2 inode size");
1375 while (argc-- > 1) {
1377 if (argv[0][0] != '-') {
1381 device_name = argv[0];
1384 switch (argv[0][0]) {
1414 check_mount(); /* trying to check a mounted filesystem? */
1415 if (repair && !automatic) {
1416 if (!isatty(0) || !isatty(1))
1417 die("need terminal for interactive repairs");
1419 IN = open(device_name, repair ? O_RDWR : O_RDONLY);
1421 die("unable to open '%s'");
1422 for (count = 0; count < 3; count++)
1427 * Determine whether or not we should continue with the checking.
1428 * This is based on the status of the filesystem valid and error
1429 * flags and whether or not the -f switch was specified on the
1432 printf("%s, %s\n", applet_name, program_version);
1433 if (!(Super.s_state & MINIX_ERROR_FS) &&
1434 (Super.s_state & MINIX_VALID_FS) && !force) {
1436 printf("%s is clean, no check.\n", device_name);
1439 printf("Forcing filesystem check on %s.\n", device_name);
1441 printf("Filesystem on %s is dirty, needs checking.\n",
1446 if (repair && !automatic) {
1447 tcgetattr(0, &termios);
1449 tmp.c_lflag &= ~(ICANON | ECHO);
1450 tcsetattr(0, TCSANOW, &tmp);
1466 for (i = 1, free = 0; i <= INODES; i++)
1467 if (!inode_in_use(i))
1469 printf("\n%6ld inodes used (%ld%%)\n", (INODES - free),
1470 100 * (INODES - free) / INODES);
1471 for (i = FIRSTZONE, free = 0; i < ZONES; i++)
1472 if (!zone_in_use(i))
1474 printf("%6ld zones used (%ld%%)\n", (ZONES - free),
1475 100 * (ZONES - free) / ZONES);
1476 printf("\n%6d regular files\n"
1478 "%6d character device files\n"
1479 "%6d block device files\n"
1481 "%6d symbolic links\n"
1484 regular, directory, chardev, blockdev,
1485 links - 2 * directory + 1, symlinks,
1486 total - 2 * directory + 1);
1490 printf("----------------------------\n"
1491 "FILE SYSTEM HAS BEEN CHANGED\n"
1492 "----------------------------\n");
1493 for (count = 0; count < 3; count++)
1496 write_super_block();
1498 if (repair && !automatic)
1499 tcsetattr(0, TCSANOW, &termios);
1503 if (errors_uncorrected)