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 usage(fsck_minix_usage);
296 static void die(const char *str)
298 errorMsg("%s\n", str);
303 * This simply goes through the file-name data and prints out the
306 static void print_current_name(void)
310 while (i < name_depth)
311 printf("/%.*s", namelen, name_list[i++]);
316 static int ask(const char *string, int def)
322 errors_uncorrected = 1;
328 errors_uncorrected = 1;
331 printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
334 if ((c = getchar()) == EOF) {
336 errors_uncorrected = 1;
343 } else if (c == 'N') {
346 } else if (c == ' ' || c == '\n')
353 errors_uncorrected = 1;
359 * Make certain that we aren't checking a filesystem that is on a
360 * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
361 * 1994 Theodore Ts'o. Also licensed under GPL.
363 static void check_mount(void)
370 if ((f = setmntent(MOUNTED, "r")) == NULL)
372 while ((mnt = getmntent(f)) != NULL)
373 if (strcmp(device_name, mnt->mnt_fsname) == 0)
380 * If the root is mounted read-only, then /etc/mtab is
381 * probably not correct; so we won't issue a warning based on
384 fd = open(MOUNTED, O_RDWR);
385 if (fd < 0 && errno == EROFS)
390 printf("%s is mounted. ", device_name);
391 if (isatty(0) && isatty(1))
392 cont = ask("Do you really want to continue", 0);
396 printf("check aborted.\n");
403 * check_zone_nr checks to see that *nr is a valid zone nr. If it
404 * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
405 * if an error was corrected, and returns the zone (0 for no zone
406 * or a bad zone-number).
408 static int check_zone_nr(unsigned short *nr, int *corrected)
413 printf("Zone nr < FIRSTZONE in file `");
414 else if (*nr >= ZONES)
415 printf("Zone nr >= ZONES in file `");
418 print_current_name();
420 if (ask("Remove block", 1)) {
428 static int check_zone_nr2(unsigned int *nr, int *corrected)
433 printf("Zone nr < FIRSTZONE in file `");
434 else if (*nr >= ZONES)
435 printf("Zone nr >= ZONES in file `");
438 print_current_name();
440 if (ask("Remove block", 1)) {
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 '");
459 print_current_name();
461 memset(addr, 0, BLOCK_SIZE);
462 errors_uncorrected = 1;
463 } else if (BLOCK_SIZE != read(IN, addr, BLOCK_SIZE)) {
464 printf("Read error: bad block in file '");
465 print_current_name();
467 memset(addr, 0, BLOCK_SIZE);
468 errors_uncorrected = 1;
473 * write_block writes block nr to disk.
475 static void write_block(unsigned int nr, char *addr)
479 if (nr < FIRSTZONE || nr >= ZONES) {
480 printf("Internal error: trying to write bad block\n"
481 "Write request ignored\n");
482 errors_uncorrected = 1;
485 if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET))
486 die("seek failed in write_block");
487 if (BLOCK_SIZE != write(IN, addr, BLOCK_SIZE)) {
488 printf("Write error: bad block in file '");
489 print_current_name();
491 errors_uncorrected = 1;
496 * map-block calculates the absolute block nr of a block in a file.
497 * It sets 'changed' if the inode has needed changing, and re-writes
498 * any indirect blocks with errors.
500 static int map_block(struct minix_inode *inode, unsigned int blknr)
502 unsigned short ind[BLOCK_SIZE >> 1];
503 unsigned short dind[BLOCK_SIZE >> 1];
504 int blk_chg, block, result;
507 return check_zone_nr(inode->i_zone + blknr, &changed);
510 block = check_zone_nr(inode->i_zone + 7, &changed);
511 read_block(block, (char *) ind);
513 result = check_zone_nr(blknr + ind, &blk_chg);
515 write_block(block, (char *) ind);
519 block = check_zone_nr(inode->i_zone + 8, &changed);
520 read_block(block, (char *) dind);
522 result = check_zone_nr(dind + (blknr / 512), &blk_chg);
524 write_block(block, (char *) dind);
526 read_block(block, (char *) ind);
528 result = check_zone_nr(ind + (blknr % 512), &blk_chg);
530 write_block(block, (char *) ind);
535 static int map_block2(struct minix2_inode *inode, unsigned int blknr)
537 unsigned int ind[BLOCK_SIZE >> 2];
538 unsigned int dind[BLOCK_SIZE >> 2];
539 unsigned int tind[BLOCK_SIZE >> 2];
540 int blk_chg, block, result;
543 return check_zone_nr2(inode->i_zone + blknr, &changed);
546 block = check_zone_nr2(inode->i_zone + 7, &changed);
547 read_block(block, (char *) ind);
549 result = check_zone_nr2(blknr + ind, &blk_chg);
551 write_block(block, (char *) ind);
555 if (blknr >= 256 * 256) {
556 block = check_zone_nr2(inode->i_zone + 8, &changed);
557 read_block(block, (char *) dind);
559 result = check_zone_nr2(dind + blknr / 256, &blk_chg);
561 write_block(block, (char *) dind);
563 read_block(block, (char *) ind);
565 result = check_zone_nr2(ind + blknr % 256, &blk_chg);
567 write_block(block, (char *) ind);
571 block = check_zone_nr2(inode->i_zone + 9, &changed);
572 read_block(block, (char *) tind);
574 result = check_zone_nr2(tind + blknr / (256 * 256), &blk_chg);
576 write_block(block, (char *) tind);
578 read_block(block, (char *) dind);
580 result = check_zone_nr2(dind + (blknr / 256) % 256, &blk_chg);
582 write_block(block, (char *) dind);
584 read_block(block, (char *) ind);
586 result = check_zone_nr2(ind + blknr % 256, &blk_chg);
588 write_block(block, (char *) ind);
593 static void write_super_block(void)
596 * Set the state of the filesystem based on whether or not there
597 * are uncorrected errors. The filesystem valid flag is
598 * unconditionally set if we get this far.
600 Super.s_state |= MINIX_VALID_FS;
601 if (errors_uncorrected)
602 Super.s_state |= MINIX_ERROR_FS;
604 Super.s_state &= ~MINIX_ERROR_FS;
606 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
607 die("seek failed in write_super_block");
608 if (BLOCK_SIZE != write(IN, super_block_buffer, BLOCK_SIZE))
609 die("unable to write super-block");
614 static void write_tables(void)
618 if (IMAPS * BLOCK_SIZE != write(IN, inode_map, IMAPS * BLOCK_SIZE))
619 die("Unable to write inode map");
620 if (ZMAPS * BLOCK_SIZE != write(IN, zone_map, ZMAPS * BLOCK_SIZE))
621 die("Unable to write zone map");
622 if (INODE_BUFFER_SIZE != write(IN, inode_buffer, INODE_BUFFER_SIZE))
623 die("Unable to write inodes");
626 static void get_dirsize(void)
629 char blk[BLOCK_SIZE];
634 block = Inode2[ROOT_INO].i_zone[0];
637 block = Inode[ROOT_INO].i_zone[0];
638 read_block(block, blk);
639 for (size = 16; size < BLOCK_SIZE; size <<= 1) {
640 if (strcmp(blk + size + 2, "..") == 0) {
649 static void read_superblock(void)
651 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
653 if (BLOCK_SIZE != read(IN, super_block_buffer, BLOCK_SIZE))
654 die("unable to read super block");
655 if (MAGIC == MINIX_SUPER_MAGIC) {
659 } else if (MAGIC == MINIX_SUPER_MAGIC2) {
664 } else if (MAGIC == MINIX2_SUPER_MAGIC) {
668 } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
674 die("bad magic number in super-block");
675 if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
676 die("Only 1k blocks/zones supported");
677 if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
678 die("bad s_imap_blocks field in super-block");
679 if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
680 die("bad s_zmap_blocks field in super-block");
683 static void read_tables(void)
685 inode_map = xmalloc(IMAPS * BLOCK_SIZE);
686 zone_map = xmalloc(ZMAPS * BLOCK_SIZE);
687 memset(inode_map, 0, sizeof(inode_map));
688 memset(zone_map, 0, sizeof(zone_map));
689 inode_buffer = xmalloc(INODE_BUFFER_SIZE);
690 inode_count = xmalloc(INODES + 1);
691 zone_count = xmalloc(ZONES);
692 if (IMAPS * BLOCK_SIZE != read(IN, inode_map, IMAPS * BLOCK_SIZE))
693 die("Unable to read inode map");
694 if (ZMAPS * BLOCK_SIZE != read(IN, zone_map, ZMAPS * BLOCK_SIZE))
695 die("Unable to read zone map");
696 if (INODE_BUFFER_SIZE != read(IN, inode_buffer, INODE_BUFFER_SIZE))
697 die("Unable to read inodes");
698 if (NORM_FIRSTZONE != FIRSTZONE) {
699 printf("Warning: Firstzone != Norm_firstzone\n");
700 errors_uncorrected = 1;
704 printf("%ld inodes\n", INODES);
705 printf("%ld blocks\n", ZONES);
706 printf("Firstdatazone=%ld (%ld)\n", FIRSTZONE, NORM_FIRSTZONE);
707 printf("Zonesize=%d\n", BLOCK_SIZE << ZONESIZE);
708 printf("Maxsize=%ld\n", MAXSIZE);
709 printf("Filesystem state=%d\n", Super.s_state);
710 printf("namelen=%d\n\n", namelen);
714 struct minix_inode *get_inode(unsigned int nr)
716 struct minix_inode *inode;
718 if (!nr || nr > INODES)
722 if (!inode_count[nr]) {
723 if (!inode_in_use(nr)) {
724 printf("Inode %d marked not used, but used for file '", nr);
725 print_current_name();
728 if (ask("Mark in use", 1))
731 errors_uncorrected = 1;
734 if (S_ISDIR(inode->i_mode))
736 else if (S_ISREG(inode->i_mode))
738 else if (S_ISCHR(inode->i_mode))
740 else if (S_ISBLK(inode->i_mode))
742 else if (S_ISLNK(inode->i_mode))
744 else if (S_ISSOCK(inode->i_mode));
745 else if (S_ISFIFO(inode->i_mode));
747 print_current_name();
748 printf(" has mode %05o\n", inode->i_mode);
753 if (!++inode_count[nr]) {
754 printf("Warning: inode count too big.\n");
756 errors_uncorrected = 1;
762 struct minix2_inode *get_inode2(unsigned int nr)
764 struct minix2_inode *inode;
766 if (!nr || nr > INODES)
770 if (!inode_count[nr]) {
771 if (!inode_in_use(nr)) {
772 printf("Inode %d marked not used, but used for file '", nr);
773 print_current_name();
776 if (ask("Mark in use", 1))
779 errors_uncorrected = 1;
782 if (S_ISDIR(inode->i_mode))
784 else if (S_ISREG(inode->i_mode))
786 else if (S_ISCHR(inode->i_mode))
788 else if (S_ISBLK(inode->i_mode))
790 else if (S_ISLNK(inode->i_mode))
792 else if (S_ISSOCK(inode->i_mode));
793 else if (S_ISFIFO(inode->i_mode));
795 print_current_name();
796 printf(" has mode %05o\n", inode->i_mode);
800 if (!++inode_count[nr]) {
801 printf("Warning: inode count too big.\n");
803 errors_uncorrected = 1;
809 static void check_root(void)
811 struct minix_inode *inode = Inode + ROOT_INO;
813 if (!inode || !S_ISDIR(inode->i_mode))
814 die("root inode isn't a directory");
818 static void check_root2(void)
820 struct minix2_inode *inode = Inode2 + ROOT_INO;
822 if (!inode || !S_ISDIR(inode->i_mode))
823 die("root inode isn't a directory");
827 static int add_zone(unsigned short *znr, int *corrected)
833 block = check_zone_nr(znr, corrected);
836 if (zone_count[block]) {
837 printf("Block has been used before. Now in file `");
838 print_current_name();
840 if (ask("Clear", 1)) {
848 if (!zone_in_use(block)) {
849 printf("Block %d in file `", block);
850 print_current_name();
851 printf("' is marked not in use.");
852 if (ask("Correct", 1))
855 if (!++zone_count[block])
861 static int add_zone2(unsigned int *znr, int *corrected)
867 block = check_zone_nr2(znr, corrected);
870 if (zone_count[block]) {
871 printf("Block has been used before. Now in file `");
872 print_current_name();
874 if (ask("Clear", 1)) {
882 if (!zone_in_use(block)) {
883 printf("Block %d in file `", block);
884 print_current_name();
885 printf("' is marked not in use.");
886 if (ask("Correct", 1))
889 if (!++zone_count[block])
895 static void add_zone_ind(unsigned short *znr, int *corrected)
897 static char blk[BLOCK_SIZE];
901 block = add_zone(znr, corrected);
904 read_block(block, blk);
905 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
906 add_zone(i + (unsigned short *) blk, &chg_blk);
908 write_block(block, blk);
912 static void add_zone_ind2(unsigned int *znr, int *corrected)
914 static char blk[BLOCK_SIZE];
918 block = add_zone2(znr, corrected);
921 read_block(block, blk);
922 for (i = 0; i < BLOCK_SIZE >> 2; i++)
923 add_zone2(i + (unsigned int *) blk, &chg_blk);
925 write_block(block, blk);
929 static void add_zone_dind(unsigned short *znr, int *corrected)
931 static char blk[BLOCK_SIZE];
935 block = add_zone(znr, corrected);
938 read_block(block, blk);
939 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
940 add_zone_ind(i + (unsigned short *) blk, &blk_chg);
942 write_block(block, blk);
946 static void add_zone_dind2(unsigned int *znr, int *corrected)
948 static char blk[BLOCK_SIZE];
952 block = add_zone2(znr, corrected);
955 read_block(block, blk);
956 for (i = 0; i < BLOCK_SIZE >> 2; i++)
957 add_zone_ind2(i + (unsigned int *) blk, &blk_chg);
959 write_block(block, blk);
962 static void add_zone_tind2(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_dind2(i + (unsigned int *) blk, &blk_chg);
975 write_block(block, blk);
979 static void check_zones(unsigned int i)
981 struct minix_inode *inode;
983 if (!i || i > INODES)
985 if (inode_count[i] > 1) /* have we counted this file already? */
988 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
989 !S_ISLNK(inode->i_mode)) return;
990 for (i = 0; i < 7; i++)
991 add_zone(i + inode->i_zone, &changed);
992 add_zone_ind(7 + inode->i_zone, &changed);
993 add_zone_dind(8 + inode->i_zone, &changed);
997 static void check_zones2(unsigned int i)
999 struct minix2_inode *inode;
1001 if (!i || i > INODES)
1003 if (inode_count[i] > 1) /* have we counted this file already? */
1006 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
1007 && !S_ISLNK(inode->i_mode))
1009 for (i = 0; i < 7; i++)
1010 add_zone2(i + inode->i_zone, &changed);
1011 add_zone_ind2(7 + inode->i_zone, &changed);
1012 add_zone_dind2(8 + inode->i_zone, &changed);
1013 add_zone_tind2(9 + inode->i_zone, &changed);
1017 static void check_file(struct minix_inode *dir, unsigned int offset)
1019 static char blk[BLOCK_SIZE];
1020 struct minix_inode *inode;
1025 block = map_block(dir, offset / BLOCK_SIZE);
1026 read_block(block, blk);
1027 name = blk + (offset % BLOCK_SIZE) + 2;
1028 ino = *(unsigned short *) (name - 2);
1030 print_current_name();
1031 printf(" contains a bad inode number for file '");
1032 printf("%.*s'.", namelen, name);
1033 if (ask(" Remove", 1)) {
1034 *(unsigned short *) (name - 2) = 0;
1035 write_block(block, blk);
1039 if (name_depth < MAX_DEPTH)
1040 strncpy(name_list[name_depth], name, namelen);
1042 inode = get_inode(ino);
1045 if (!inode || strcmp(".", name)) {
1046 print_current_name();
1047 printf(": bad directory: '.' isn't first\n");
1048 errors_uncorrected = 1;
1052 if (offset == dirsize) {
1053 if (!inode || strcmp("..", name)) {
1054 print_current_name();
1055 printf(": bad directory: '..' isn't second\n");
1056 errors_uncorrected = 1;
1062 if (name_depth < MAX_DEPTH)
1063 strncpy(name_list[name_depth], name, namelen);
1067 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1068 print_current_name();
1069 if (S_ISDIR(inode->i_mode))
1075 if (inode && S_ISDIR(inode->i_mode))
1076 recursive_check(ino);
1082 static void check_file2(struct minix2_inode *dir, unsigned int offset)
1084 static char blk[BLOCK_SIZE];
1085 struct minix2_inode *inode;
1090 block = map_block2(dir, offset / BLOCK_SIZE);
1091 read_block(block, blk);
1092 name = blk + (offset % BLOCK_SIZE) + 2;
1093 ino = *(unsigned short *) (name - 2);
1095 print_current_name();
1096 printf(" contains a bad inode number for file '");
1097 printf("%.*s'.", namelen, name);
1098 if (ask(" Remove", 1)) {
1099 *(unsigned short *) (name - 2) = 0;
1100 write_block(block, blk);
1104 if (name_depth < MAX_DEPTH)
1105 strncpy(name_list[name_depth], name, namelen);
1107 inode = get_inode2(ino);
1110 if (!inode || strcmp(".", name)) {
1111 print_current_name();
1112 printf(": bad directory: '.' isn't first\n");
1113 errors_uncorrected = 1;
1117 if (offset == dirsize) {
1118 if (!inode || strcmp("..", name)) {
1119 print_current_name();
1120 printf(": bad directory: '..' isn't second\n");
1121 errors_uncorrected = 1;
1130 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1131 print_current_name();
1132 if (S_ISDIR(inode->i_mode))
1138 if (inode && S_ISDIR(inode->i_mode))
1139 recursive_check2(ino);
1145 static void recursive_check(unsigned int ino)
1147 struct minix_inode *dir;
1148 unsigned int offset;
1151 if (!S_ISDIR(dir->i_mode))
1152 die("internal error");
1153 if (dir->i_size < 2 * dirsize) {
1154 print_current_name();
1155 printf(": bad directory: size<32");
1156 errors_uncorrected = 1;
1158 for (offset = 0; offset < dir->i_size; offset += dirsize)
1159 check_file(dir, offset);
1163 static void recursive_check2(unsigned int ino)
1165 struct minix2_inode *dir;
1166 unsigned int offset;
1169 if (!S_ISDIR(dir->i_mode))
1170 die("internal error");
1171 if (dir->i_size < 2 * dirsize) {
1172 print_current_name();
1173 printf(": bad directory: size < 32");
1174 errors_uncorrected = 1;
1176 for (offset = 0; offset < dir->i_size; offset += dirsize)
1177 check_file2(dir, offset);
1181 static int bad_zone(int i)
1185 if (BLOCK_SIZE * i != lseek(IN, BLOCK_SIZE * i, SEEK_SET))
1186 die("seek failed in bad_zone");
1187 return (BLOCK_SIZE != read(IN, buffer, BLOCK_SIZE));
1190 static void check_counts(void)
1194 for (i = 1; i <= INODES; i++) {
1195 if (!inode_in_use(i) && Inode[i].i_mode && warn_mode) {
1196 printf("Inode %d mode not cleared.", i);
1197 if (ask("Clear", 1)) {
1198 Inode[i].i_mode = 0;
1202 if (!inode_count[i]) {
1203 if (!inode_in_use(i))
1205 printf("Inode %d not used, marked used in the bitmap.", i);
1206 if (ask("Clear", 1))
1210 if (!inode_in_use(i)) {
1211 printf("Inode %d used, marked unused in the bitmap.", i);
1215 if (Inode[i].i_nlinks != inode_count[i]) {
1216 printf("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.",
1217 i, Inode[i].i_mode, Inode[i].i_nlinks, inode_count[i]);
1218 if (ask("Set i_nlinks to count", 1)) {
1219 Inode[i].i_nlinks = inode_count[i];
1224 for (i = FIRSTZONE; i < ZONES; i++) {
1225 if (zone_in_use(i) == zone_count[i])
1227 if (!zone_count[i]) {
1230 printf("Zone %d: marked in use, no file uses it.", i);
1231 if (ask("Unmark", 1))
1235 printf("Zone %d: %sin use, counted=%d\n",
1236 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1241 static void check_counts2(void)
1245 for (i = 1; i <= INODES; i++) {
1246 if (!inode_in_use(i) && Inode2[i].i_mode && warn_mode) {
1247 printf("Inode %d mode not cleared.", i);
1248 if (ask("Clear", 1)) {
1249 Inode2[i].i_mode = 0;
1253 if (!inode_count[i]) {
1254 if (!inode_in_use(i))
1256 printf("Inode %d not used, marked used in the bitmap.", i);
1257 if (ask("Clear", 1))
1261 if (!inode_in_use(i)) {
1262 printf("Inode %d used, marked unused in the bitmap.", i);
1266 if (Inode2[i].i_nlinks != inode_count[i]) {
1267 printf("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.",
1268 i, Inode2[i].i_mode, Inode2[i].i_nlinks,
1270 if (ask("Set i_nlinks to count", 1)) {
1271 Inode2[i].i_nlinks = inode_count[i];
1276 for (i = FIRSTZONE; i < ZONES; i++) {
1277 if (zone_in_use(i) == zone_count[i])
1279 if (!zone_count[i]) {
1282 printf("Zone %d: marked in use, no file uses it.", i);
1283 if (ask("Unmark", 1))
1287 printf("Zone %d: %sin use, counted=%d\n",
1288 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1293 static void check(void)
1295 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1296 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1297 check_zones(ROOT_INO);
1298 recursive_check(ROOT_INO);
1303 static void check2(void)
1305 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1306 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1307 check_zones2(ROOT_INO);
1308 recursive_check2(ROOT_INO);
1313 /* Wed Feb 9 15:17:06 MST 2000 */
1314 /* dynamically allocate name_list (instead of making it static) */
1315 static void alloc_name_list(void)
1319 name_list = xmalloc(sizeof(char *) * MAX_DEPTH);
1320 for (i = 0; i < MAX_DEPTH; i++)
1321 name_list[i] = xmalloc(sizeof(char) * BUFSIZ + 1);
1325 /* execute this atexit() to deallocate name_list[] */
1326 /* piptigger was here */
1327 static void free_name_list(void)
1332 for (i = 0; i < MAX_DEPTH; i++) {
1342 extern int fsck_minix_main(int argc, char **argv)
1349 /* Don't bother to free memory. Exit does
1350 * that automagically, so we can save a few bytes */
1351 //atexit(free_name_list);
1353 if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
1354 die("bad inode size");
1356 if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
1357 die("bad v2 inode size");
1359 while (argc-- > 1) {
1361 if (argv[0][0] != '-') {
1365 device_name = argv[0];
1368 switch (argv[0][0]) {
1398 check_mount(); /* trying to check a mounted filesystem? */
1399 if (repair && !automatic) {
1400 if (!isatty(0) || !isatty(1))
1401 die("need terminal for interactive repairs");
1403 IN = open(device_name, repair ? O_RDWR : O_RDONLY);
1405 die("unable to open '%s'");
1406 for (count = 0; count < 3; count++)
1411 * Determine whether or not we should continue with the checking.
1412 * This is based on the status of the filesystem valid and error
1413 * flags and whether or not the -f switch was specified on the
1416 printf("%s, %s\n", applet_name, program_version);
1417 if (!(Super.s_state & MINIX_ERROR_FS) &&
1418 (Super.s_state & MINIX_VALID_FS) && !force) {
1420 printf("%s is clean, no check.\n", device_name);
1423 printf("Forcing filesystem check on %s.\n", device_name);
1425 printf("Filesystem on %s is dirty, needs checking.\n",
1430 if (repair && !automatic) {
1431 tcgetattr(0, &termios);
1433 tmp.c_lflag &= ~(ICANON | ECHO);
1434 tcsetattr(0, TCSANOW, &tmp);
1450 for (i = 1, free = 0; i <= INODES; i++)
1451 if (!inode_in_use(i))
1453 printf("\n%6ld inodes used (%ld%%)\n", (INODES - free),
1454 100 * (INODES - free) / INODES);
1455 for (i = FIRSTZONE, free = 0; i < ZONES; i++)
1456 if (!zone_in_use(i))
1458 printf("%6ld zones used (%ld%%)\n", (ZONES - free),
1459 100 * (ZONES - free) / ZONES);
1460 printf("\n%6d regular files\n"
1462 "%6d character device files\n"
1463 "%6d block device files\n"
1465 "%6d symbolic links\n"
1468 regular, directory, chardev, blockdev,
1469 links - 2 * directory + 1, symlinks,
1470 total - 2 * directory + 1);
1474 printf("----------------------------\n"
1475 "FILE SYSTEM HAS BEEN CHANGED\n"
1476 "----------------------------\n");
1477 for (count = 0; count < 3; count++)
1480 write_super_block();
1482 if (repair && !automatic)
1483 tcsetattr(0, TCSANOW, &termios);
1487 if (errors_uncorrected)