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> /* for PATH_MAX */
102 #include <linux/fs.h>
103 #include <linux/minix_fs.h>
105 #ifdef MINIX2_SUPER_MAGIC2
106 #define HAVE_MINIX2 1
115 #define UPPER(size,n) ((size+((n)-1))/(n))
116 #define INODE_SIZE (sizeof(struct minix_inode))
118 #define INODE_SIZE2 (sizeof(struct minix2_inode))
119 #define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
120 : MINIX_INODES_PER_BLOCK))
122 #define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK))
124 #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
126 #define BITS_PER_BLOCK (BLOCK_SIZE<<3)
128 static char *program_name = "fsck.minix";
129 static char *program_version = "1.2 - 11/11/96";
130 static char *device_name = NULL;
132 static int repair = 0, automatic = 0, verbose = 0, list = 0, show =
133 0, warn_mode = 0, force = 0;
134 static int directory = 0, regular = 0, blockdev = 0, chardev = 0, links =
135 0, symlinks = 0, total = 0;
137 static int changed = 0; /* flags if the filesystem has been changed */
138 static int errors_uncorrected = 0; /* flag if some error was not corrected */
139 static int dirsize = 16;
140 static int namelen = 14;
141 static int version2 = 0;
142 static struct termios termios;
143 static int termios_set = 0;
147 static int name_depth = 0;
148 // static char name_list[MAX_DEPTH][PATH_MAX + 1];
149 static char **name_list;
151 static char *inode_buffer = NULL;
153 #define Inode (((struct minix_inode *) inode_buffer)-1)
154 #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
155 static char super_block_buffer[BLOCK_SIZE];
157 #define Super (*(struct minix_super_block *)super_block_buffer)
158 #define INODES ((unsigned long)Super.s_ninodes)
160 #define ZONES ((unsigned long)(version2 ? Super.s_zones : Super.s_nzones))
162 #define ZONES ((unsigned long)(Super.s_nzones))
164 #define IMAPS ((unsigned long)Super.s_imap_blocks)
165 #define ZMAPS ((unsigned long)Super.s_zmap_blocks)
166 #define FIRSTZONE ((unsigned long)Super.s_firstdatazone)
167 #define ZONESIZE ((unsigned long)Super.s_log_zone_size)
168 #define MAXSIZE ((unsigned long)Super.s_max_size)
169 #define MAGIC (Super.s_magic)
170 #define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS)
172 static char *inode_map;
173 static char *zone_map;
175 static unsigned char *inode_count = NULL;
176 static unsigned char *zone_count = NULL;
178 static void recursive_check(unsigned int ino);
179 static void recursive_check2(unsigned int ino);
181 #define inode_in_use(x) (bit(inode_map,(x)))
182 #define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1))
184 #define mark_inode(x) (setbit(inode_map,(x)),changed=1)
185 #define unmark_inode(x) (clrbit(inode_map,(x)),changed=1)
187 #define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1),changed=1)
188 #define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1),changed=1)
190 static void leave(int) __attribute__ ((noreturn));
191 static void leave(int status)
194 tcsetattr(0, TCSANOW, &termios);
198 static void show_usage(void)
200 fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n",
202 fprintf(stderr, "Usage: %s [-larvsmf] /dev/name\n\n", program_name);
204 "Performs a consistency check for MINIX filesystems.\n\n");
205 fprintf(stderr, "OPTIONS:\n");
206 fprintf(stderr, "\t-l\tLists all filenames\n");
207 fprintf(stderr, "\t-r\tPerform interactive repairs\n");
208 fprintf(stderr, "\t-a\tPerform automatic repairs\n");
209 fprintf(stderr, "\t-v\tverbose\n");
210 fprintf(stderr, "\t-s\tOutputs super-block information\n");
212 "\t-m\tActivates MINIX-like \"mode not cleared\" warnings\n");
213 fprintf(stderr, "\t-f\tForce file system check.\n\n");
217 static void die(const char *str)
219 fprintf(stderr, "%s: %s\n", program_name, str);
224 * This simply goes through the file-name data and prints out the
227 static void print_current_name(void)
231 while (i < name_depth)
232 printf("/%.*s", namelen, name_list[i++]);
237 static int ask(const char *string, int def)
243 errors_uncorrected = 1;
249 errors_uncorrected = 1;
252 printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
255 if ((c = getchar()) == EOF) {
257 errors_uncorrected = 1;
264 } else if (c == 'N') {
267 } else if (c == ' ' || c == '\n')
274 errors_uncorrected = 1;
280 * Make certain that we aren't checking a filesystem that is on a
281 * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
282 * 1994 Theodore Ts'o. Also licensed under GPL.
284 static void check_mount(void)
291 if ((f = setmntent(MOUNTED, "r")) == NULL)
293 while ((mnt = getmntent(f)) != NULL)
294 if (strcmp(device_name, mnt->mnt_fsname) == 0)
301 * If the root is mounted read-only, then /etc/mtab is
302 * probably not correct; so we won't issue a warning based on
305 fd = open(MOUNTED, O_RDWR);
306 if (fd < 0 && errno == EROFS)
311 printf("%s is mounted. ", device_name);
312 if (isatty(0) && isatty(1))
313 cont = ask("Do you really want to continue", 0);
317 printf("check aborted.\n");
324 * check_zone_nr checks to see that *nr is a valid zone nr. If it
325 * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
326 * if an error was corrected, and returns the zone (0 for no zone
327 * or a bad zone-number).
329 static int check_zone_nr(unsigned short *nr, int *corrected)
334 printf("Zone nr < FIRSTZONE in file `");
335 else if (*nr >= ZONES)
336 printf("Zone nr >= ZONES in file `");
339 print_current_name();
341 if (ask("Remove block", 1)) {
349 static int check_zone_nr2(unsigned int *nr, int *corrected)
354 printf("Zone nr < FIRSTZONE in file `");
355 else if (*nr >= ZONES)
356 printf("Zone nr >= ZONES in file `");
359 print_current_name();
361 if (ask("Remove block", 1)) {
370 * read-block reads block nr into the buffer at addr.
372 static void read_block(unsigned int nr, char *addr)
375 memset(addr, 0, BLOCK_SIZE);
378 if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET)) {
379 printf("Read error: unable to seek to block in file '");
380 print_current_name();
382 memset(addr, 0, BLOCK_SIZE);
383 errors_uncorrected = 1;
384 } else if (BLOCK_SIZE != read(IN, addr, BLOCK_SIZE)) {
385 printf("Read error: bad block in file '");
386 print_current_name();
388 memset(addr, 0, BLOCK_SIZE);
389 errors_uncorrected = 1;
394 * write_block writes block nr to disk.
396 static void write_block(unsigned int nr, char *addr)
400 if (nr < FIRSTZONE || nr >= ZONES) {
401 printf("Internal error: trying to write bad block\n"
402 "Write request ignored\n");
403 errors_uncorrected = 1;
406 if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET))
407 die("seek failed in write_block");
408 if (BLOCK_SIZE != write(IN, addr, BLOCK_SIZE)) {
409 printf("Write error: bad block in file '");
410 print_current_name();
412 errors_uncorrected = 1;
417 * map-block calculates the absolute block nr of a block in a file.
418 * It sets 'changed' if the inode has needed changing, and re-writes
419 * any indirect blocks with errors.
421 static int map_block(struct minix_inode *inode, unsigned int blknr)
423 unsigned short ind[BLOCK_SIZE >> 1];
424 unsigned short dind[BLOCK_SIZE >> 1];
425 int blk_chg, block, result;
428 return check_zone_nr(inode->i_zone + blknr, &changed);
431 block = check_zone_nr(inode->i_zone + 7, &changed);
432 read_block(block, (char *) ind);
434 result = check_zone_nr(blknr + ind, &blk_chg);
436 write_block(block, (char *) ind);
440 block = check_zone_nr(inode->i_zone + 8, &changed);
441 read_block(block, (char *) dind);
443 result = check_zone_nr(dind + (blknr / 512), &blk_chg);
445 write_block(block, (char *) dind);
447 read_block(block, (char *) ind);
449 result = check_zone_nr(ind + (blknr % 512), &blk_chg);
451 write_block(block, (char *) ind);
456 static int map_block2(struct minix2_inode *inode, unsigned int blknr)
458 unsigned int ind[BLOCK_SIZE >> 2];
459 unsigned int dind[BLOCK_SIZE >> 2];
460 unsigned int tind[BLOCK_SIZE >> 2];
461 int blk_chg, block, result;
464 return check_zone_nr2(inode->i_zone + blknr, &changed);
467 block = check_zone_nr2(inode->i_zone + 7, &changed);
468 read_block(block, (char *) ind);
470 result = check_zone_nr2(blknr + ind, &blk_chg);
472 write_block(block, (char *) ind);
476 if (blknr >= 256 * 256) {
477 block = check_zone_nr2(inode->i_zone + 8, &changed);
478 read_block(block, (char *) dind);
480 result = check_zone_nr2(dind + blknr / 256, &blk_chg);
482 write_block(block, (char *) dind);
484 read_block(block, (char *) ind);
486 result = check_zone_nr2(ind + blknr % 256, &blk_chg);
488 write_block(block, (char *) ind);
492 block = check_zone_nr2(inode->i_zone + 9, &changed);
493 read_block(block, (char *) tind);
495 result = check_zone_nr2(tind + blknr / (256 * 256), &blk_chg);
497 write_block(block, (char *) tind);
499 read_block(block, (char *) dind);
501 result = check_zone_nr2(dind + (blknr / 256) % 256, &blk_chg);
503 write_block(block, (char *) dind);
505 read_block(block, (char *) ind);
507 result = check_zone_nr2(ind + blknr % 256, &blk_chg);
509 write_block(block, (char *) ind);
514 static void write_super_block(void)
517 * Set the state of the filesystem based on whether or not there
518 * are uncorrected errors. The filesystem valid flag is
519 * unconditionally set if we get this far.
521 Super.s_state |= MINIX_VALID_FS;
522 if (errors_uncorrected)
523 Super.s_state |= MINIX_ERROR_FS;
525 Super.s_state &= ~MINIX_ERROR_FS;
527 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
528 die("seek failed in write_super_block");
529 if (BLOCK_SIZE != write(IN, super_block_buffer, BLOCK_SIZE))
530 die("unable to write super-block");
535 static void write_tables(void)
539 if (IMAPS * BLOCK_SIZE != write(IN, inode_map, IMAPS * BLOCK_SIZE))
540 die("Unable to write inode map");
541 if (ZMAPS * BLOCK_SIZE != write(IN, zone_map, ZMAPS * BLOCK_SIZE))
542 die("Unable to write zone map");
543 if (INODE_BUFFER_SIZE != write(IN, inode_buffer, INODE_BUFFER_SIZE))
544 die("Unable to write inodes");
547 static void get_dirsize(void)
550 char blk[BLOCK_SIZE];
555 block = Inode2[ROOT_INO].i_zone[0];
558 block = Inode[ROOT_INO].i_zone[0];
559 read_block(block, blk);
560 for (size = 16; size < BLOCK_SIZE; size <<= 1) {
561 if (strcmp(blk + size + 2, "..") == 0) {
570 static void read_superblock(void)
572 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
574 if (BLOCK_SIZE != read(IN, super_block_buffer, BLOCK_SIZE))
575 die("unable to read super block");
576 if (MAGIC == MINIX_SUPER_MAGIC) {
580 } else if (MAGIC == MINIX_SUPER_MAGIC2) {
585 } else if (MAGIC == MINIX2_SUPER_MAGIC) {
589 } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
595 die("bad magic number in super-block");
596 if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
597 die("Only 1k blocks/zones supported");
598 if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
599 die("bad s_imap_blocks field in super-block");
600 if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
601 die("bad s_zmap_blocks field in super-block");
604 static void read_tables(void)
606 inode_map = malloc(IMAPS * BLOCK_SIZE);
608 die("Unable to allocate buffer for inode map");
609 zone_map = malloc(ZMAPS * BLOCK_SIZE);
611 die("Unable to allocate buffer for zone map");
612 memset(inode_map, 0, sizeof(inode_map));
613 memset(zone_map, 0, sizeof(zone_map));
614 inode_buffer = malloc(INODE_BUFFER_SIZE);
616 die("Unable to allocate buffer for inodes");
617 inode_count = malloc(INODES + 1);
619 die("Unable to allocate buffer for inode count");
620 zone_count = malloc(ZONES);
622 die("Unable to allocate buffer for zone count");
623 if (IMAPS * BLOCK_SIZE != read(IN, inode_map, IMAPS * BLOCK_SIZE))
624 die("Unable to read inode map");
625 if (ZMAPS * BLOCK_SIZE != read(IN, zone_map, ZMAPS * BLOCK_SIZE))
626 die("Unable to read zone map");
627 if (INODE_BUFFER_SIZE != read(IN, inode_buffer, INODE_BUFFER_SIZE))
628 die("Unable to read inodes");
629 if (NORM_FIRSTZONE != FIRSTZONE) {
630 printf("Warning: Firstzone != Norm_firstzone\n");
631 errors_uncorrected = 1;
635 printf("%ld inodes\n", INODES);
636 printf("%ld blocks\n", ZONES);
637 printf("Firstdatazone=%ld (%ld)\n", FIRSTZONE, NORM_FIRSTZONE);
638 printf("Zonesize=%d\n", BLOCK_SIZE << ZONESIZE);
639 printf("Maxsize=%ld\n", MAXSIZE);
640 printf("Filesystem state=%d\n", Super.s_state);
641 printf("namelen=%d\n\n", namelen);
645 struct minix_inode *get_inode(unsigned int nr)
647 struct minix_inode *inode;
649 if (!nr || nr > INODES)
653 if (!inode_count[nr]) {
654 if (!inode_in_use(nr)) {
655 printf("Inode %d marked not used, but used for file '", nr);
656 print_current_name();
659 if (ask("Mark in use", 1))
662 errors_uncorrected = 1;
665 if (S_ISDIR(inode->i_mode))
667 else if (S_ISREG(inode->i_mode))
669 else if (S_ISCHR(inode->i_mode))
671 else if (S_ISBLK(inode->i_mode))
673 else if (S_ISLNK(inode->i_mode))
675 else if (S_ISSOCK(inode->i_mode));
676 else if (S_ISFIFO(inode->i_mode));
678 print_current_name();
679 printf(" has mode %05o\n", inode->i_mode);
684 if (!++inode_count[nr]) {
685 printf("Warning: inode count too big.\n");
687 errors_uncorrected = 1;
693 struct minix2_inode *get_inode2(unsigned int nr)
695 struct minix2_inode *inode;
697 if (!nr || nr > INODES)
701 if (!inode_count[nr]) {
702 if (!inode_in_use(nr)) {
703 printf("Inode %d marked not used, but used for file '", nr);
704 print_current_name();
707 if (ask("Mark in use", 1))
710 errors_uncorrected = 1;
713 if (S_ISDIR(inode->i_mode))
715 else if (S_ISREG(inode->i_mode))
717 else if (S_ISCHR(inode->i_mode))
719 else if (S_ISBLK(inode->i_mode))
721 else if (S_ISLNK(inode->i_mode))
723 else if (S_ISSOCK(inode->i_mode));
724 else if (S_ISFIFO(inode->i_mode));
726 print_current_name();
727 printf(" has mode %05o\n", inode->i_mode);
731 if (!++inode_count[nr]) {
732 printf("Warning: inode count too big.\n");
734 errors_uncorrected = 1;
740 static void check_root(void)
742 struct minix_inode *inode = Inode + ROOT_INO;
744 if (!inode || !S_ISDIR(inode->i_mode))
745 die("root inode isn't a directory");
749 static void check_root2(void)
751 struct minix2_inode *inode = Inode2 + ROOT_INO;
753 if (!inode || !S_ISDIR(inode->i_mode))
754 die("root inode isn't a directory");
758 static int add_zone(unsigned short *znr, int *corrected)
764 block = check_zone_nr(znr, corrected);
767 if (zone_count[block]) {
768 printf("Block has been used before. Now in file `");
769 print_current_name();
771 if (ask("Clear", 1)) {
779 if (!zone_in_use(block)) {
780 printf("Block %d in file `", block);
781 print_current_name();
782 printf("' is marked not in use.");
783 if (ask("Correct", 1))
786 if (!++zone_count[block])
792 static int add_zone2(unsigned int *znr, int *corrected)
798 block = check_zone_nr2(znr, corrected);
801 if (zone_count[block]) {
802 printf("Block has been used before. Now in file `");
803 print_current_name();
805 if (ask("Clear", 1)) {
813 if (!zone_in_use(block)) {
814 printf("Block %d in file `", block);
815 print_current_name();
816 printf("' is marked not in use.");
817 if (ask("Correct", 1))
820 if (!++zone_count[block])
826 static void add_zone_ind(unsigned short *znr, int *corrected)
828 static char blk[BLOCK_SIZE];
832 block = add_zone(znr, corrected);
835 read_block(block, blk);
836 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
837 add_zone(i + (unsigned short *) blk, &chg_blk);
839 write_block(block, blk);
843 static void add_zone_ind2(unsigned int *znr, int *corrected)
845 static char blk[BLOCK_SIZE];
849 block = add_zone2(znr, corrected);
852 read_block(block, blk);
853 for (i = 0; i < BLOCK_SIZE >> 2; i++)
854 add_zone2(i + (unsigned int *) blk, &chg_blk);
856 write_block(block, blk);
860 static void add_zone_dind(unsigned short *znr, int *corrected)
862 static char blk[BLOCK_SIZE];
866 block = add_zone(znr, corrected);
869 read_block(block, blk);
870 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
871 add_zone_ind(i + (unsigned short *) blk, &blk_chg);
873 write_block(block, blk);
877 static void add_zone_dind2(unsigned int *znr, int *corrected)
879 static char blk[BLOCK_SIZE];
883 block = add_zone2(znr, corrected);
886 read_block(block, blk);
887 for (i = 0; i < BLOCK_SIZE >> 2; i++)
888 add_zone_ind2(i + (unsigned int *) blk, &blk_chg);
890 write_block(block, blk);
893 static void add_zone_tind2(unsigned int *znr, int *corrected)
895 static char blk[BLOCK_SIZE];
899 block = add_zone2(znr, corrected);
902 read_block(block, blk);
903 for (i = 0; i < BLOCK_SIZE >> 2; i++)
904 add_zone_dind2(i + (unsigned int *) blk, &blk_chg);
906 write_block(block, blk);
910 static void check_zones(unsigned int i)
912 struct minix_inode *inode;
914 if (!i || i > INODES)
916 if (inode_count[i] > 1) /* have we counted this file already? */
919 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
920 !S_ISLNK(inode->i_mode)) return;
921 for (i = 0; i < 7; i++)
922 add_zone(i + inode->i_zone, &changed);
923 add_zone_ind(7 + inode->i_zone, &changed);
924 add_zone_dind(8 + inode->i_zone, &changed);
928 static void check_zones2(unsigned int i)
930 struct minix2_inode *inode;
932 if (!i || i > INODES)
934 if (inode_count[i] > 1) /* have we counted this file already? */
937 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
938 && !S_ISLNK(inode->i_mode))
940 for (i = 0; i < 7; i++)
941 add_zone2(i + inode->i_zone, &changed);
942 add_zone_ind2(7 + inode->i_zone, &changed);
943 add_zone_dind2(8 + inode->i_zone, &changed);
944 add_zone_tind2(9 + inode->i_zone, &changed);
948 static void check_file(struct minix_inode *dir, unsigned int offset)
950 static char blk[BLOCK_SIZE];
951 struct minix_inode *inode;
956 block = map_block(dir, offset / BLOCK_SIZE);
957 read_block(block, blk);
958 name = blk + (offset % BLOCK_SIZE) + 2;
959 ino = *(unsigned short *) (name - 2);
961 print_current_name();
962 printf(" contains a bad inode number for file '");
963 printf("%.*s'.", namelen, name);
964 if (ask(" Remove", 1)) {
965 *(unsigned short *) (name - 2) = 0;
966 write_block(block, blk);
970 if (name_depth < MAX_DEPTH)
971 strncpy(name_list[name_depth], name, namelen);
973 inode = get_inode(ino);
976 if (!inode || strcmp(".", name)) {
977 print_current_name();
978 printf(": bad directory: '.' isn't first\n");
979 errors_uncorrected = 1;
983 if (offset == dirsize) {
984 if (!inode || strcmp("..", name)) {
985 print_current_name();
986 printf(": bad directory: '..' isn't second\n");
987 errors_uncorrected = 1;
993 if (name_depth < MAX_DEPTH)
994 strncpy(name_list[name_depth], name, namelen);
998 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
999 print_current_name();
1000 if (S_ISDIR(inode->i_mode))
1006 if (inode && S_ISDIR(inode->i_mode))
1007 recursive_check(ino);
1013 static void check_file2(struct minix2_inode *dir, unsigned int offset)
1015 static char blk[BLOCK_SIZE];
1016 struct minix2_inode *inode;
1021 block = map_block2(dir, offset / BLOCK_SIZE);
1022 read_block(block, blk);
1023 name = blk + (offset % BLOCK_SIZE) + 2;
1024 ino = *(unsigned short *) (name - 2);
1026 print_current_name();
1027 printf(" contains a bad inode number for file '");
1028 printf("%.*s'.", namelen, name);
1029 if (ask(" Remove", 1)) {
1030 *(unsigned short *) (name - 2) = 0;
1031 write_block(block, blk);
1035 if (name_depth < MAX_DEPTH)
1036 strncpy(name_list[name_depth], name, namelen);
1038 inode = get_inode2(ino);
1041 if (!inode || strcmp(".", name)) {
1042 print_current_name();
1043 printf(": bad directory: '.' isn't first\n");
1044 errors_uncorrected = 1;
1048 if (offset == dirsize) {
1049 if (!inode || strcmp("..", name)) {
1050 print_current_name();
1051 printf(": bad directory: '..' isn't second\n");
1052 errors_uncorrected = 1;
1061 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1062 print_current_name();
1063 if (S_ISDIR(inode->i_mode))
1069 if (inode && S_ISDIR(inode->i_mode))
1070 recursive_check2(ino);
1076 static void recursive_check(unsigned int ino)
1078 struct minix_inode *dir;
1079 unsigned int offset;
1082 if (!S_ISDIR(dir->i_mode))
1083 die("internal error");
1084 if (dir->i_size < 2 * dirsize) {
1085 print_current_name();
1086 printf(": bad directory: size<32");
1087 errors_uncorrected = 1;
1089 for (offset = 0; offset < dir->i_size; offset += dirsize)
1090 check_file(dir, offset);
1094 static void recursive_check2(unsigned int ino)
1096 struct minix2_inode *dir;
1097 unsigned int offset;
1100 if (!S_ISDIR(dir->i_mode))
1101 die("internal error");
1102 if (dir->i_size < 2 * dirsize) {
1103 print_current_name();
1104 printf(": bad directory: size < 32");
1105 errors_uncorrected = 1;
1107 for (offset = 0; offset < dir->i_size; offset += dirsize)
1108 check_file2(dir, offset);
1112 static int bad_zone(int i)
1116 if (BLOCK_SIZE * i != lseek(IN, BLOCK_SIZE * i, SEEK_SET))
1117 die("seek failed in bad_zone");
1118 return (BLOCK_SIZE != read(IN, buffer, BLOCK_SIZE));
1121 static void check_counts(void)
1125 for (i = 1; i <= INODES; i++) {
1126 if (!inode_in_use(i) && Inode[i].i_mode && warn_mode) {
1127 printf("Inode %d mode not cleared.", i);
1128 if (ask("Clear", 1)) {
1129 Inode[i].i_mode = 0;
1133 if (!inode_count[i]) {
1134 if (!inode_in_use(i))
1136 printf("Inode %d not used, marked used in the bitmap.", i);
1137 if (ask("Clear", 1))
1141 if (!inode_in_use(i)) {
1142 printf("Inode %d used, marked unused in the bitmap.", i);
1146 if (Inode[i].i_nlinks != inode_count[i]) {
1147 printf("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.",
1148 i, Inode[i].i_mode, Inode[i].i_nlinks, inode_count[i]);
1149 if (ask("Set i_nlinks to count", 1)) {
1150 Inode[i].i_nlinks = inode_count[i];
1155 for (i = FIRSTZONE; i < ZONES; i++) {
1156 if (zone_in_use(i) == zone_count[i])
1158 if (!zone_count[i]) {
1161 printf("Zone %d: marked in use, no file uses it.", i);
1162 if (ask("Unmark", 1))
1166 printf("Zone %d: %sin use, counted=%d\n",
1167 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1172 static void check_counts2(void)
1176 for (i = 1; i <= INODES; i++) {
1177 if (!inode_in_use(i) && Inode2[i].i_mode && warn_mode) {
1178 printf("Inode %d mode not cleared.", i);
1179 if (ask("Clear", 1)) {
1180 Inode2[i].i_mode = 0;
1184 if (!inode_count[i]) {
1185 if (!inode_in_use(i))
1187 printf("Inode %d not used, marked used in the bitmap.", i);
1188 if (ask("Clear", 1))
1192 if (!inode_in_use(i)) {
1193 printf("Inode %d used, marked unused in the bitmap.", i);
1197 if (Inode2[i].i_nlinks != inode_count[i]) {
1198 printf("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.",
1199 i, Inode2[i].i_mode, Inode2[i].i_nlinks,
1201 if (ask("Set i_nlinks to count", 1)) {
1202 Inode2[i].i_nlinks = inode_count[i];
1207 for (i = FIRSTZONE; i < ZONES; i++) {
1208 if (zone_in_use(i) == zone_count[i])
1210 if (!zone_count[i]) {
1213 printf("Zone %d: marked in use, no file uses it.", i);
1214 if (ask("Unmark", 1))
1218 printf("Zone %d: %sin use, counted=%d\n",
1219 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1224 static void check(void)
1226 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1227 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1228 check_zones(ROOT_INO);
1229 recursive_check(ROOT_INO);
1234 static void check2(void)
1236 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1237 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1238 check_zones2(ROOT_INO);
1239 recursive_check2(ROOT_INO);
1244 /* Wed Feb 9 15:17:06 MST 2000 */
1245 /* dynamically allocate name_list (instead of making it static) */
1246 static void alloc_name_list(void)
1250 name_list = malloc(sizeof(char *) * MAX_DEPTH);
1251 for (i = 0; i < MAX_DEPTH; i++) {
1252 name_list[i] = malloc(sizeof(char) * PATH_MAX + 1);
1256 static void free_name_list(void)
1258 if (name_list) free(name_list);
1261 extern int fsck_minix_main(int argc, char **argv)
1268 atexit(free_name_list);
1271 program_name = *argv;
1272 if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
1273 die("bad inode size");
1275 if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
1276 die("bad v2 inode size");
1278 while (argc-- > 1) {
1280 if (argv[0][0] != '-') {
1284 device_name = argv[0];
1287 switch (argv[0][0]) {
1317 check_mount(); /* trying to check a mounted filesystem? */
1318 if (repair && !automatic) {
1319 if (!isatty(0) || !isatty(1))
1320 die("need terminal for interactive repairs");
1322 IN = open(device_name, repair ? O_RDWR : O_RDONLY);
1324 die("unable to open '%s'");
1325 for (count = 0; count < 3; count++)
1330 * Determine whether or not we should continue with the checking.
1331 * This is based on the status of the filesystem valid and error
1332 * flags and whether or not the -f switch was specified on the
1335 printf("%s, %s\n", program_name, program_version);
1336 if (!(Super.s_state & MINIX_ERROR_FS) &&
1337 (Super.s_state & MINIX_VALID_FS) && !force) {
1339 printf("%s is clean, no check.\n", device_name);
1342 printf("Forcing filesystem check on %s.\n", device_name);
1344 printf("Filesystem on %s is dirty, needs checking.\n",
1349 if (repair && !automatic) {
1350 tcgetattr(0, &termios);
1352 tmp.c_lflag &= ~(ICANON | ECHO);
1353 tcsetattr(0, TCSANOW, &tmp);
1369 for (i = 1, free = 0; i <= INODES; i++)
1370 if (!inode_in_use(i))
1372 printf("\n%6ld inodes used (%ld%%)\n", (INODES - free),
1373 100 * (INODES - free) / INODES);
1374 for (i = FIRSTZONE, free = 0; i < ZONES; i++)
1375 if (!zone_in_use(i))
1377 printf("%6ld zones used (%ld%%)\n", (ZONES - free),
1378 100 * (ZONES - free) / ZONES);
1379 printf("\n%6d regular files\n"
1381 "%6d character device files\n"
1382 "%6d block device files\n"
1384 "%6d symbolic links\n"
1387 regular, directory, chardev, blockdev,
1388 links - 2 * directory + 1, symlinks,
1389 total - 2 * directory + 1);
1393 printf("----------------------------\n"
1394 "FILE SYSTEM HAS BEEN CHANGED\n"
1395 "----------------------------\n");
1396 for (count = 0; count < 3; count++)
1399 write_super_block();
1401 if (repair && !automatic)
1402 tcsetattr(0, TCSANOW, &termios);
1406 if (errors_uncorrected)