2 * fsck.c - a file system consistency checker for Linux.
4 * (C) 1991, 1992 Linus Torvalds. This file may be redistributed
5 * as per the GNU copyleft.
9 * 09.11.91 - made the first rudimetary functions
11 * 10.11.91 - updated, does checking, no repairs yet.
12 * Sent out to the mailing-list for testing.
14 * 14.11.91 - Testing seems to have gone well. Added some
15 * correction-code, and changed some functions.
17 * 15.11.91 - More correction code. Hopefully it notices most
18 * cases now, and tries to do something about them.
20 * 16.11.91 - More corrections (thanks to Mika Jalava). Most
21 * things seem to work now. Yeah, sure.
24 * 19.04.92 - Had to start over again from this old version, as a
25 * kernel bug ate my enhanced fsck in february.
27 * 28.02.93 - added support for different directory entry sizes..
29 * Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with
30 * super-block information
32 * Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform
33 * to that required by fsutil
35 * Mon Jan 3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu)
36 * Added support for file system valid flag. Also
37 * added program_version variable and output of
38 * program name and version number when program
41 * 30.10.94 - added support for v2 filesystem
42 * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
44 * 10.12.94 - added test to prevent checking of mounted fs adapted
45 * from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck
46 * program. (Daniel Quinlan, quinlan@yggdrasil.com)
48 * 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such
49 * for modern libcs (janl@math.uio.no, Nicolai Langfeldt)
51 * 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk
52 * (Russell King). He made them for ARM. It would seem
53 * that the ARM is powerful enough to do this in C whereas
54 * i386 and m64k must use assembly to get it fast >:-)
55 * This should make minix fsck systemindependent.
56 * (janl@math.uio.no, Nicolai Langfeldt)
58 * 04.11.96 - Added minor fixes from Andreas Schwab to avoid compiler
59 * warnings. Added mc68k bitops from
60 * Joerg Dorchain <dorchain@mpi-sb.mpg.de>.
62 * 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by
65 * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org>
66 * - added Native Language Support
69 * I've had no time to add comments - hopefully the function names
70 * are comments enough. As with all file system checkers, this assumes
71 * the file system is quiescent - don't use it on a mounted device
72 * unless you can be sure nobody is writing to it (and remember that the
73 * kernel can write to it when it searches for files).
75 * Usuage: fsck [-larvsm] device
76 * -l for a listing of all the filenames
77 * -a for automatic repairs (not implemented)
78 * -r for repairs (interactive) (not implemented)
79 * -v for verbose (tells how many files)
80 * -s for super-block info
81 * -m for minix-like "mode not cleared" warnings
82 * -f force filesystem check even if filesystem marked as valid
84 * The device may be a block device or a image of one, but this isn't
85 * enforced (but it's not much fun on a character device :-).
99 #include <sys/param.h> /* for PATH_MAX */
101 #include <linux/fs.h>
102 #include <linux/minix_fs.h>
104 #ifdef MINIX2_SUPER_MAGIC2
105 #define HAVE_MINIX2 1
114 #define UPPER(size,n) ((size+((n)-1))/(n))
115 #define INODE_SIZE (sizeof(struct minix_inode))
117 #define INODE_SIZE2 (sizeof(struct minix2_inode))
118 #define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
119 : MINIX_INODES_PER_BLOCK))
121 #define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK))
123 #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
125 #define BITS_PER_BLOCK (BLOCK_SIZE<<3)
127 static char * program_name = "fsck.minix";
128 static char * program_version = "1.2 - 11/11/96";
129 static char * device_name = NULL;
131 static int repair=0, automatic=0, verbose=0, list=0, show=0, warn_mode=0,
133 static int directory=0, regular=0, blockdev=0, chardev=0, links=0,
136 static int changed = 0; /* flags if the filesystem has been changed */
137 static int errors_uncorrected = 0; /* flag if some error was not corrected */
138 static int dirsize = 16;
139 static int namelen = 14;
140 static int version2 = 0;
141 static struct termios termios;
142 static int termios_set = 0;
146 static int name_depth = 0;
147 static char name_list[MAX_DEPTH][PATH_MAX + 1];
149 static char * inode_buffer = NULL;
150 #define Inode (((struct minix_inode *) inode_buffer)-1)
151 #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
152 static char super_block_buffer[BLOCK_SIZE];
153 #define Super (*(struct minix_super_block *)super_block_buffer)
154 #define INODES ((unsigned long)Super.s_ninodes)
156 #define ZONES ((unsigned long)(version2 ? Super.s_zones : Super.s_nzones))
158 #define ZONES ((unsigned long)(Super.s_nzones))
160 #define IMAPS ((unsigned long)Super.s_imap_blocks)
161 #define ZMAPS ((unsigned long)Super.s_zmap_blocks)
162 #define FIRSTZONE ((unsigned long)Super.s_firstdatazone)
163 #define ZONESIZE ((unsigned long)Super.s_log_zone_size)
164 #define MAXSIZE ((unsigned long)Super.s_max_size)
165 #define MAGIC (Super.s_magic)
166 #define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS)
168 static char *inode_map;
169 static char *zone_map;
171 static unsigned char * inode_count = NULL;
172 static unsigned char * zone_count = NULL;
174 static void recursive_check(unsigned int ino);
175 static void recursive_check2(unsigned int ino);
177 #define inode_in_use(x) (bit(inode_map,(x)))
178 #define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1))
180 #define mark_inode(x) (setbit(inode_map,(x)),changed=1)
181 #define unmark_inode(x) (clrbit(inode_map,(x)),changed=1)
183 #define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1),changed=1)
184 #define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1),changed=1)
186 static void leave(int) __attribute__ ((noreturn));
187 static void leave(int status)
190 tcsetattr(0, TCSANOW, &termios);
194 static void show_usage(void) {
195 fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n", BB_VER, BB_BT);
196 fprintf(stderr, "Usage: %s [-larvsmf] /dev/name\n\n", program_name);
197 fprintf(stderr, "Performs a consistency check for MINIX filesystems.\n\n");
198 fprintf(stderr, "OPTIONS:\n");
199 fprintf(stderr, "\t-l\tLists all filenames\n");
200 fprintf(stderr, "\t-r\tPerform interactive repairs\n");
201 fprintf(stderr, "\t-a\tPerform automatic repairs\n");
202 fprintf(stderr, "\t-v\tverbose\n");
203 fprintf(stderr, "\t-s\tOutputs super-block information\n");
204 fprintf(stderr, "\t-m\tActivates MINIX-like \"mode not cleared\" warnings\n");
205 fprintf(stderr, "\t-f\tForce file system check.\n\n");
209 static void die(const char *str) {
210 fprintf(stderr, "%s: %s\n", program_name, str);
215 * This simply goes through the file-name data and prints out the
218 static void print_current_name(void)
223 printf("/%.*s",namelen,name_list[i++]);
228 static int ask(const char * string, int def)
234 errors_uncorrected = 1;
240 errors_uncorrected = 1;
243 printf(def?"%s (y/n)? ":"%s (n/y)? ",string);
246 if ((c=getchar())==EOF) {
248 errors_uncorrected = 1;
255 } else if (c == 'N') {
258 } else if (c == ' ' || c == '\n')
265 errors_uncorrected = 1;
271 * Make certain that we aren't checking a filesystem that is on a
272 * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
273 * 1994 Theodore Ts'o. Also licensed under GPL.
275 static void check_mount(void)
282 if ((f = setmntent (MOUNTED, "r")) == NULL)
284 while ((mnt = getmntent (f)) != NULL)
285 if (strcmp (device_name, mnt->mnt_fsname) == 0)
292 * If the root is mounted read-only, then /etc/mtab is
293 * probably not correct; so we won't issue a warning based on
296 fd = open(MOUNTED, O_RDWR);
297 if (fd < 0 && errno == EROFS)
302 printf ("%s is mounted. ", device_name);
303 if (isatty(0) && isatty(1))
304 cont = ask("Do you really want to continue", 0);
308 printf ("check aborted.\n");
315 * check_zone_nr checks to see that *nr is a valid zone nr. If it
316 * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
317 * if an error was corrected, and returns the zone (0 for no zone
318 * or a bad zone-number).
320 static int check_zone_nr(unsigned short * nr, int * corrected)
325 printf("Zone nr < FIRSTZONE in file `");
326 else if (*nr >= ZONES)
327 printf("Zone nr >= ZONES in file `");
330 print_current_name();
332 if (ask("Remove block",1)) {
340 static int check_zone_nr2 (unsigned int *nr, int *corrected)
345 printf ("Zone nr < FIRSTZONE in file `");
346 else if (*nr >= ZONES)
347 printf ("Zone nr >= ZONES in file `");
350 print_current_name ();
352 if (ask ("Remove block", 1)) {
361 * read-block reads block nr into the buffer at addr.
363 static void read_block(unsigned int nr, char * addr)
366 memset(addr,0,BLOCK_SIZE);
369 if (BLOCK_SIZE*nr != lseek(IN, BLOCK_SIZE*nr, SEEK_SET)) {
370 printf("Read error: unable to seek to block in file '");
371 print_current_name();
373 memset(addr,0,BLOCK_SIZE);
374 errors_uncorrected = 1;
375 } else if (BLOCK_SIZE != read(IN, addr, BLOCK_SIZE)) {
376 printf("Read error: bad block in file '");
377 print_current_name();
379 memset(addr,0,BLOCK_SIZE);
380 errors_uncorrected = 1;
385 * write_block writes block nr to disk.
387 static void write_block(unsigned int nr, char * addr)
391 if (nr < FIRSTZONE || nr >= ZONES) {
392 printf("Internal error: trying to write bad block\n"
393 "Write request ignored\n");
394 errors_uncorrected = 1;
397 if (BLOCK_SIZE*nr != lseek(IN, BLOCK_SIZE*nr, SEEK_SET))
398 die("seek failed in write_block");
399 if (BLOCK_SIZE != write(IN, addr, BLOCK_SIZE)) {
400 printf("Write error: bad block in file '");
401 print_current_name();
403 errors_uncorrected = 1;
408 * map-block calculates the absolute block nr of a block in a file.
409 * It sets 'changed' if the inode has needed changing, and re-writes
410 * any indirect blocks with errors.
412 static int map_block(struct minix_inode * inode, unsigned int blknr)
414 unsigned short ind[BLOCK_SIZE>>1];
415 unsigned short dind[BLOCK_SIZE>>1];
416 int blk_chg, block, result;
419 return check_zone_nr(inode->i_zone + blknr, &changed);
422 block = check_zone_nr(inode->i_zone + 7, &changed);
423 read_block(block, (char *) ind);
425 result = check_zone_nr(blknr + ind, &blk_chg);
427 write_block(block, (char *) ind);
431 block = check_zone_nr(inode->i_zone + 8, &changed);
432 read_block(block, (char *) dind);
434 result = check_zone_nr(dind + (blknr/512), &blk_chg);
436 write_block(block, (char *) dind);
438 read_block(block, (char *) ind);
440 result = check_zone_nr(ind + (blknr%512), &blk_chg);
442 write_block(block, (char *) ind);
447 static int map_block2 (struct minix2_inode *inode, unsigned int blknr)
449 unsigned int ind[BLOCK_SIZE >> 2];
450 unsigned int dind[BLOCK_SIZE >> 2];
451 unsigned int tind[BLOCK_SIZE >> 2];
452 int blk_chg, block, result;
455 return check_zone_nr2 (inode->i_zone + blknr, &changed);
458 block = check_zone_nr2 (inode->i_zone + 7, &changed);
459 read_block (block, (char *) ind);
461 result = check_zone_nr2 (blknr + ind, &blk_chg);
463 write_block (block, (char *) ind);
467 if (blknr >= 256 * 256) {
468 block = check_zone_nr2 (inode->i_zone + 8, &changed);
469 read_block (block, (char *) dind);
471 result = check_zone_nr2 (dind + blknr / 256, &blk_chg);
473 write_block (block, (char *) dind);
475 read_block (block, (char *) ind);
477 result = check_zone_nr2 (ind + blknr % 256, &blk_chg);
479 write_block (block, (char *) ind);
483 block = check_zone_nr2 (inode->i_zone + 9, &changed);
484 read_block (block, (char *) tind);
486 result = check_zone_nr2 (tind + blknr / (256 * 256), &blk_chg);
488 write_block (block, (char *) tind);
490 read_block (block, (char *) dind);
492 result = check_zone_nr2 (dind + (blknr / 256) % 256, &blk_chg);
494 write_block (block, (char *) dind);
496 read_block (block, (char *) ind);
498 result = check_zone_nr2 (ind + blknr % 256, &blk_chg);
500 write_block (block, (char *) ind);
505 static void write_super_block(void)
508 * Set the state of the filesystem based on whether or not there
509 * are uncorrected errors. The filesystem valid flag is
510 * unconditionally set if we get this far.
512 Super.s_state |= MINIX_VALID_FS;
513 if ( errors_uncorrected )
514 Super.s_state |= MINIX_ERROR_FS;
516 Super.s_state &= ~MINIX_ERROR_FS;
518 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
519 die("seek failed in write_super_block");
520 if (BLOCK_SIZE != write(IN, super_block_buffer, BLOCK_SIZE))
521 die("unable to write super-block");
526 static void write_tables(void)
530 if (IMAPS*BLOCK_SIZE != write(IN,inode_map,IMAPS*BLOCK_SIZE))
531 die("Unable to write inode map");
532 if (ZMAPS*BLOCK_SIZE != write(IN,zone_map,ZMAPS*BLOCK_SIZE))
533 die("Unable to write zone map");
534 if (INODE_BUFFER_SIZE != write(IN,inode_buffer,INODE_BUFFER_SIZE))
535 die("Unable to write inodes");
538 static void get_dirsize (void)
541 char blk[BLOCK_SIZE];
546 block = Inode2[ROOT_INO].i_zone[0];
549 block = Inode[ROOT_INO].i_zone[0];
550 read_block (block, blk);
551 for (size = 16; size < BLOCK_SIZE; size <<= 1) {
552 if (strcmp (blk + size + 2, "..") == 0) {
561 static void read_superblock(void)
563 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
565 if (BLOCK_SIZE != read(IN, super_block_buffer, BLOCK_SIZE))
566 die("unable to read super block");
567 if (MAGIC == MINIX_SUPER_MAGIC) {
571 } else if (MAGIC == MINIX_SUPER_MAGIC2) {
576 } else if (MAGIC == MINIX2_SUPER_MAGIC) {
580 } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
586 die("bad magic number in super-block");
587 if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
588 die("Only 1k blocks/zones supported");
589 if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
590 die("bad s_imap_blocks field in super-block");
591 if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
592 die("bad s_zmap_blocks field in super-block");
595 static void read_tables(void)
597 inode_map = malloc(IMAPS * BLOCK_SIZE);
599 die("Unable to allocate buffer for inode map");
600 zone_map = malloc(ZMAPS * BLOCK_SIZE);
602 die("Unable to allocate buffer for zone map");
603 memset(inode_map,0,sizeof(inode_map));
604 memset(zone_map,0,sizeof(zone_map));
605 inode_buffer = malloc(INODE_BUFFER_SIZE);
607 die("Unable to allocate buffer for inodes");
608 inode_count = malloc(INODES + 1);
610 die("Unable to allocate buffer for inode count");
611 zone_count = malloc(ZONES);
613 die("Unable to allocate buffer for zone count");
614 if (IMAPS*BLOCK_SIZE != read(IN,inode_map,IMAPS*BLOCK_SIZE))
615 die("Unable to read inode map");
616 if (ZMAPS*BLOCK_SIZE != read(IN,zone_map,ZMAPS*BLOCK_SIZE))
617 die("Unable to read zone map");
618 if (INODE_BUFFER_SIZE != read(IN,inode_buffer,INODE_BUFFER_SIZE))
619 die("Unable to read inodes");
620 if (NORM_FIRSTZONE != FIRSTZONE) {
621 printf("Warning: Firstzone != Norm_firstzone\n");
622 errors_uncorrected = 1;
626 printf("%ld inodes\n",INODES);
627 printf("%ld blocks\n",ZONES);
628 printf("Firstdatazone=%ld (%ld)\n",FIRSTZONE,NORM_FIRSTZONE);
629 printf("Zonesize=%d\n",BLOCK_SIZE<<ZONESIZE);
630 printf("Maxsize=%ld\n",MAXSIZE);
631 printf("Filesystem state=%d\n", Super.s_state);
632 printf("namelen=%d\n\n",namelen);
636 struct minix_inode * get_inode(unsigned int nr)
638 struct minix_inode * inode;
640 if (!nr || nr > INODES)
644 if (!inode_count[nr]) {
645 if (!inode_in_use(nr)) {
646 printf("Inode %d marked not used, but used for file '",
648 print_current_name();
651 if (ask("Mark in use",1))
654 errors_uncorrected = 1;
657 if (S_ISDIR(inode->i_mode))
659 else if (S_ISREG(inode->i_mode))
661 else if (S_ISCHR(inode->i_mode))
663 else if (S_ISBLK(inode->i_mode))
665 else if (S_ISLNK(inode->i_mode))
667 else if (S_ISSOCK(inode->i_mode))
669 else if (S_ISFIFO(inode->i_mode))
672 print_current_name();
673 printf(" has mode %05o\n",inode->i_mode);
678 if (!++inode_count[nr]) {
679 printf("Warning: inode count too big.\n");
681 errors_uncorrected = 1;
687 struct minix2_inode *
688 get_inode2 (unsigned int nr)
690 struct minix2_inode *inode;
692 if (!nr || nr > INODES)
696 if (!inode_count[nr]) {
697 if (!inode_in_use (nr)) {
698 printf ("Inode %d marked not used, but used for file '", nr);
699 print_current_name ();
702 if (ask ("Mark in use", 1))
705 errors_uncorrected = 1;
708 if (S_ISDIR (inode->i_mode))
710 else if (S_ISREG (inode->i_mode))
712 else if (S_ISCHR (inode->i_mode))
714 else if (S_ISBLK (inode->i_mode))
716 else if (S_ISLNK (inode->i_mode))
718 else if (S_ISSOCK (inode->i_mode));
719 else if (S_ISFIFO (inode->i_mode));
721 print_current_name ();
722 printf (" has mode %05o\n", inode->i_mode);
726 if (!++inode_count[nr]) {
727 printf ("Warning: inode count too big.\n");
729 errors_uncorrected = 1;
735 static void check_root(void)
737 struct minix_inode * inode = Inode + ROOT_INO;
739 if (!inode || !S_ISDIR(inode->i_mode))
740 die("root inode isn't a directory");
744 static void check_root2 (void)
746 struct minix2_inode *inode = Inode2 + ROOT_INO;
748 if (!inode || !S_ISDIR (inode->i_mode))
749 die ("root inode isn't a directory");
753 static int add_zone(unsigned short * znr, int * corrected)
759 block = check_zone_nr(znr, corrected);
762 if (zone_count[block]) {
763 printf("Block has been used before. Now in file `");
764 print_current_name();
766 if (ask("Clear",1)) {
774 if (!zone_in_use(block)) {
775 printf("Block %d in file `",block);
776 print_current_name();
777 printf("' is marked not in use.");
778 if (ask("Correct",1))
781 if (!++zone_count[block])
787 static int add_zone2 (unsigned int *znr, int *corrected)
793 block = check_zone_nr2 (znr, corrected);
796 if (zone_count[block]) {
797 printf ("Block has been used before. Now in file `");
798 print_current_name ();
800 if (ask ("Clear", 1)) {
808 if (!zone_in_use (block)) {
809 printf ("Block %d in file `", block);
810 print_current_name ();
811 printf ("' is marked not in use.");
812 if (ask ("Correct", 1))
815 if (!++zone_count[block])
821 static void add_zone_ind(unsigned short * znr, int * corrected)
823 static char blk[BLOCK_SIZE];
827 block = add_zone(znr, corrected);
830 read_block(block, blk);
831 for (i=0 ; i < (BLOCK_SIZE>>1) ; i++)
832 add_zone(i + (unsigned short *) blk, &chg_blk);
834 write_block(block, blk);
839 add_zone_ind2 (unsigned int *znr, int *corrected)
841 static char blk[BLOCK_SIZE];
845 block = add_zone2 (znr, corrected);
848 read_block (block, blk);
849 for (i = 0; i < BLOCK_SIZE >> 2; i++)
850 add_zone2 (i + (unsigned int *) blk, &chg_blk);
852 write_block (block, blk);
856 static void add_zone_dind(unsigned short * znr, int * corrected)
858 static char blk[BLOCK_SIZE];
862 block = add_zone(znr, corrected);
865 read_block(block, blk);
866 for (i=0 ; i < (BLOCK_SIZE>>1) ; i++)
867 add_zone_ind(i + (unsigned short *) blk, &blk_chg);
869 write_block(block, blk);
874 add_zone_dind2 (unsigned int *znr, int *corrected)
876 static char blk[BLOCK_SIZE];
880 block = add_zone2 (znr, corrected);
883 read_block (block, blk);
884 for (i = 0; i < BLOCK_SIZE >> 2; i++)
885 add_zone_ind2 (i + (unsigned int *) blk, &blk_chg);
887 write_block (block, blk);
891 add_zone_tind2 (unsigned int *znr, int *corrected)
893 static char blk[BLOCK_SIZE];
897 block = add_zone2 (znr, corrected);
900 read_block (block, blk);
901 for (i = 0; i < BLOCK_SIZE >> 2; i++)
902 add_zone_dind2 (i + (unsigned int *) blk, &blk_chg);
904 write_block (block, blk);
908 static void check_zones(unsigned int i)
910 struct minix_inode * inode;
912 if (!i || i > INODES)
914 if (inode_count[i] > 1) /* have we counted this file already? */
917 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
918 !S_ISLNK(inode->i_mode))
920 for (i=0 ; i<7 ; i++)
921 add_zone(i + inode->i_zone, &changed);
922 add_zone_ind(7 + inode->i_zone, &changed);
923 add_zone_dind(8 + inode->i_zone, &changed);
928 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;
982 if (offset == dirsize) {
983 if (!inode || strcmp("..",name)) {
984 print_current_name();
985 printf(": bad directory: '..' isn't second\n");
986 errors_uncorrected = 1;
991 if (name_depth < MAX_DEPTH)
992 strncpy(name_list[name_depth],name,namelen);
996 printf("%6d %07o %3d ",ino,inode->i_mode,inode->i_nlinks);
997 print_current_name();
998 if (S_ISDIR(inode->i_mode))
1004 if (inode && S_ISDIR(inode->i_mode))
1005 recursive_check(ino);
1012 check_file2 (struct minix2_inode *dir, unsigned int offset)
1014 static char blk[BLOCK_SIZE];
1015 struct minix2_inode *inode;
1020 block = map_block2 (dir, offset / BLOCK_SIZE);
1021 read_block (block, blk);
1022 name = blk + (offset % BLOCK_SIZE) + 2;
1023 ino = *(unsigned short *) (name - 2);
1025 print_current_name ();
1026 printf (" contains a bad inode number for file '");
1027 printf ("%.*s'.", namelen, name);
1028 if (ask (" Remove", 1)) {
1029 *(unsigned short *) (name - 2) = 0;
1030 write_block (block, blk);
1034 if (name_depth < MAX_DEPTH)
1035 strncpy (name_list[name_depth], name, namelen);
1037 inode = get_inode2 (ino);
1040 if (!inode || strcmp (".", name)) {
1041 print_current_name ();
1042 printf (": bad directory: '.' isn't first\n");
1043 errors_uncorrected = 1;
1047 if (offset == dirsize) {
1048 if (!inode || strcmp ("..", name)) {
1049 print_current_name ();
1050 printf (": bad directory: '..' isn't second\n");
1051 errors_uncorrected = 1;
1060 printf ("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1061 print_current_name ();
1062 if (S_ISDIR (inode->i_mode))
1068 if (inode && S_ISDIR (inode->i_mode))
1069 recursive_check2 (ino);
1075 static void recursive_check(unsigned int ino)
1077 struct minix_inode * dir;
1078 unsigned int offset;
1081 if (!S_ISDIR(dir->i_mode))
1082 die("internal error");
1083 if (dir->i_size < 2 * dirsize) {
1084 print_current_name();
1085 printf(": bad directory: size<32");
1086 errors_uncorrected = 1;
1088 for (offset = 0 ; offset < dir->i_size ; offset += dirsize)
1089 check_file(dir,offset);
1094 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);
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]);
1173 check_counts2 (void)
1177 for (i = 1; i <= INODES; i++) {
1178 if (!inode_in_use (i) && Inode2[i].i_mode && warn_mode) {
1179 printf ("Inode %d mode not cleared.", i);
1180 if (ask ("Clear", 1)) {
1181 Inode2[i].i_mode = 0;
1185 if (!inode_count[i]) {
1186 if (!inode_in_use (i))
1188 printf ("Inode %d not used, marked used in the bitmap.", i);
1189 if (ask ("Clear", 1))
1193 if (!inode_in_use (i)) {
1194 printf ("Inode %d used, marked unused in the bitmap.", i);
1198 if (Inode2[i].i_nlinks != inode_count[i]) {
1199 printf ("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.",
1200 i, Inode2[i].i_mode, Inode2[i].i_nlinks, inode_count[i]);
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);
1237 memset (inode_count, 0, (INODES + 1) * sizeof (*inode_count));
1238 memset (zone_count, 0, ZONES * sizeof (*zone_count));
1239 check_zones2 (ROOT_INO);
1240 recursive_check2 (ROOT_INO);
1246 fsck_minix_main(int argc, char ** argv)
1253 program_name = *argv;
1254 if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
1255 die("bad inode size");
1257 if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
1258 die("bad v2 inode size");
1260 while (argc-- > 1) {
1262 if (argv[0][0] != '-') {
1266 device_name = argv[0];
1267 } else while (*++argv[0])
1268 switch (argv[0][0]) {
1269 case 'l': list=1; break;
1270 case 'a': automatic=1; repair=1; break;
1271 case 'r': automatic=0; repair=1; break;
1272 case 'v': verbose=1; break;
1273 case 's': show=1; break;
1274 case 'm': warn_mode=1; break;
1275 case 'f': force=1; break;
1276 default: show_usage();
1281 check_mount(); /* trying to check a mounted filesystem? */
1282 if (repair && !automatic) {
1283 if (!isatty(0) || !isatty(1))
1284 die("need terminal for interactive repairs");
1286 IN = open(device_name,repair?O_RDWR:O_RDONLY);
1288 die("unable to open '%s'");
1289 for (count=0 ; count<3 ; count++)
1294 * Determine whether or not we should continue with the checking.
1295 * This is based on the status of the filesystem valid and error
1296 * flags and whether or not the -f switch was specified on the
1299 printf("%s, %s\n", program_name, program_version);
1300 if ( !(Super.s_state & MINIX_ERROR_FS) &&
1301 (Super.s_state & MINIX_VALID_FS) &&
1304 printf("%s is clean, no check.\n", device_name);
1308 printf("Forcing filesystem check on %s.\n", device_name);
1310 printf("Filesystem on %s is dirty, needs checking.\n",\
1315 if (repair && !automatic) {
1316 tcgetattr(0,&termios);
1318 tmp.c_lflag &= ~(ICANON|ECHO);
1319 tcsetattr(0,TCSANOW,&tmp);
1336 for (i=1,free=0 ; i <= INODES ; i++)
1337 if (!inode_in_use(i))
1339 printf("\n%6ld inodes used (%ld%%)\n",(INODES-free),
1340 100*(INODES-free)/INODES);
1341 for (i=FIRSTZONE,free=0 ; i < ZONES ; i++)
1342 if (!zone_in_use(i))
1344 printf("%6ld zones used (%ld%%)\n",(ZONES-free),
1345 100*(ZONES-free)/ZONES);
1346 printf("\n%6d regular files\n"
1348 "%6d character device files\n"
1349 "%6d block device files\n"
1351 "%6d symbolic links\n"
1354 regular,directory,chardev,blockdev,
1355 links-2*directory+1,symlinks,total-2*directory+1);
1359 printf( "----------------------------\n"
1360 "FILE SYSTEM HAS BEEN CHANGED\n"
1361 "----------------------------\n");
1362 for (count=0 ; count<3 ; count++)
1366 write_super_block();
1368 if (repair && !automatic)
1369 tcsetattr(0,TCSANOW,&termios);
1373 if (errors_uncorrected)