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 :-).
100 #include <linux/fs.h>
101 #include <linux/minix_fs.h>
103 #ifdef MINIX2_SUPER_MAGIC2
104 #define HAVE_MINIX2 1
113 #define UPPER(size,n) ((size+((n)-1))/(n))
114 #define INODE_SIZE (sizeof(struct minix_inode))
116 #define INODE_SIZE2 (sizeof(struct minix2_inode))
117 #define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
118 : MINIX_INODES_PER_BLOCK))
120 #define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK))
122 #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
124 #define BITS_PER_BLOCK (BLOCK_SIZE<<3)
126 static char * program_name = "fsck.minix";
127 static char * program_version = "1.2 - 11/11/96";
128 static char * device_name = NULL;
130 static int repair=0, automatic=0, verbose=0, list=0, show=0, warn_mode=0,
132 static int directory=0, regular=0, blockdev=0, chardev=0, links=0,
135 static int changed = 0; /* flags if the filesystem has been changed */
136 static int errors_uncorrected = 0; /* flag if some error was not corrected */
137 static int dirsize = 16;
138 static int namelen = 14;
139 static int version2 = 0;
140 static struct termios termios;
141 static int termios_set = 0;
145 static int name_depth = 0;
146 static char name_list[MAX_DEPTH][NAME_MAX+1];
148 static char * inode_buffer = NULL;
149 #define Inode (((struct minix_inode *) inode_buffer)-1)
150 #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
151 static char super_block_buffer[BLOCK_SIZE];
152 #define Super (*(struct minix_super_block *)super_block_buffer)
153 #define INODES ((unsigned long)Super.s_ninodes)
155 #define ZONES ((unsigned long)(version2 ? Super.s_zones : Super.s_nzones))
157 #define ZONES ((unsigned long)(Super.s_nzones))
159 #define IMAPS ((unsigned long)Super.s_imap_blocks)
160 #define ZMAPS ((unsigned long)Super.s_zmap_blocks)
161 #define FIRSTZONE ((unsigned long)Super.s_firstdatazone)
162 #define ZONESIZE ((unsigned long)Super.s_log_zone_size)
163 #define MAXSIZE ((unsigned long)Super.s_max_size)
164 #define MAGIC (Super.s_magic)
165 #define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS)
167 static char *inode_map;
168 static char *zone_map;
170 static unsigned char * inode_count = NULL;
171 static unsigned char * zone_count = NULL;
173 static void recursive_check(unsigned int ino);
174 static void recursive_check2(unsigned int ino);
176 #define inode_in_use(x) (bit(inode_map,(x)))
177 #define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1))
179 #define mark_inode(x) (setbit(inode_map,(x)),changed=1)
180 #define unmark_inode(x) (clrbit(inode_map,(x)),changed=1)
182 #define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1),changed=1)
183 #define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1),changed=1)
185 static void leave(int) __attribute__ ((noreturn));
186 static void leave(int status)
189 tcsetattr(0, TCSANOW, &termios);
193 static void show_usage(void) {
194 fprintf(stderr, "BusyBox v%s (%s) multi-call binary -- GPL2\n\n", BB_VER, BB_BT);
195 fprintf(stderr, "Usage: %s [-larvsmf] /dev/name\n\n", program_name);
196 fprintf(stderr, "Performs a consistency check for MINIX filesystems.\n\n");
197 fprintf(stderr, "OPTIONS:\n");
198 fprintf(stderr, "\t-l\tLists all filenames\n");
199 fprintf(stderr, "\t-r\tPerform interactive repairs\n");
200 fprintf(stderr, "\t-a\tPerform automatic repairs\n");
201 fprintf(stderr, "\t-v\tverbose\n");
202 fprintf(stderr, "\t-s\tOutputs super-block information\n");
203 fprintf(stderr, "\t-m\tActivates MINIX-like \"mode not cleared\" warnings\n");
204 fprintf(stderr, "\t-f\tForce file system check.\n\n");
208 static void die(const char *str) {
209 fprintf(stderr, "%s: %s\n", program_name, str);
214 * This simply goes through the file-name data and prints out the
217 static void print_current_name(void)
222 printf("/%.*s",namelen,name_list[i++]);
227 static int ask(const char * string, int def)
233 errors_uncorrected = 1;
239 errors_uncorrected = 1;
242 printf(def?"%s (y/n)? ":"%s (n/y)? ",string);
245 if ((c=getchar())==EOF) {
247 errors_uncorrected = 1;
254 } else if (c == 'N') {
257 } else if (c == ' ' || c == '\n')
264 errors_uncorrected = 1;
270 * Make certain that we aren't checking a filesystem that is on a
271 * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
272 * 1994 Theodore Ts'o. Also licensed under GPL.
274 static void check_mount(void)
281 if ((f = setmntent (MOUNTED, "r")) == NULL)
283 while ((mnt = getmntent (f)) != NULL)
284 if (strcmp (device_name, mnt->mnt_fsname) == 0)
291 * If the root is mounted read-only, then /etc/mtab is
292 * probably not correct; so we won't issue a warning based on
295 fd = open(MOUNTED, O_RDWR);
296 if (fd < 0 && errno == EROFS)
301 printf ("%s is mounted. ", device_name);
302 if (isatty(0) && isatty(1))
303 cont = ask("Do you really want to continue", 0);
307 printf ("check aborted.\n");
314 * check_zone_nr checks to see that *nr is a valid zone nr. If it
315 * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
316 * if an error was corrected, and returns the zone (0 for no zone
317 * or a bad zone-number).
319 static int check_zone_nr(unsigned short * nr, int * corrected)
324 printf("Zone nr < FIRSTZONE in file `");
325 else if (*nr >= ZONES)
326 printf("Zone nr >= ZONES in file `");
329 print_current_name();
331 if (ask("Remove block",1)) {
339 static int check_zone_nr2 (unsigned int *nr, int *corrected)
344 printf ("Zone nr < FIRSTZONE in file `");
345 else if (*nr >= ZONES)
346 printf ("Zone nr >= ZONES in file `");
349 print_current_name ();
351 if (ask ("Remove block", 1)) {
360 * read-block reads block nr into the buffer at addr.
362 static void read_block(unsigned int nr, char * addr)
365 memset(addr,0,BLOCK_SIZE);
368 if (BLOCK_SIZE*nr != lseek(IN, BLOCK_SIZE*nr, SEEK_SET)) {
369 printf("Read error: unable to seek to block in file '");
370 print_current_name();
372 memset(addr,0,BLOCK_SIZE);
373 errors_uncorrected = 1;
374 } else if (BLOCK_SIZE != read(IN, addr, BLOCK_SIZE)) {
375 printf("Read error: bad block in file '");
376 print_current_name();
378 memset(addr,0,BLOCK_SIZE);
379 errors_uncorrected = 1;
384 * write_block writes block nr to disk.
386 static void write_block(unsigned int nr, char * addr)
390 if (nr < FIRSTZONE || nr >= ZONES) {
391 printf("Internal error: trying to write bad block\n"
392 "Write request ignored\n");
393 errors_uncorrected = 1;
396 if (BLOCK_SIZE*nr != lseek(IN, BLOCK_SIZE*nr, SEEK_SET))
397 die("seek failed in write_block");
398 if (BLOCK_SIZE != write(IN, addr, BLOCK_SIZE)) {
399 printf("Write error: bad block in file '");
400 print_current_name();
402 errors_uncorrected = 1;
407 * map-block calculates the absolute block nr of a block in a file.
408 * It sets 'changed' if the inode has needed changing, and re-writes
409 * any indirect blocks with errors.
411 static int map_block(struct minix_inode * inode, unsigned int blknr)
413 unsigned short ind[BLOCK_SIZE>>1];
414 unsigned short dind[BLOCK_SIZE>>1];
415 int blk_chg, block, result;
418 return check_zone_nr(inode->i_zone + blknr, &changed);
421 block = check_zone_nr(inode->i_zone + 7, &changed);
422 read_block(block, (char *) ind);
424 result = check_zone_nr(blknr + ind, &blk_chg);
426 write_block(block, (char *) ind);
430 block = check_zone_nr(inode->i_zone + 8, &changed);
431 read_block(block, (char *) dind);
433 result = check_zone_nr(dind + (blknr/512), &blk_chg);
435 write_block(block, (char *) dind);
437 read_block(block, (char *) ind);
439 result = check_zone_nr(ind + (blknr%512), &blk_chg);
441 write_block(block, (char *) ind);
446 static int map_block2 (struct minix2_inode *inode, unsigned int blknr)
448 unsigned int ind[BLOCK_SIZE >> 2];
449 unsigned int dind[BLOCK_SIZE >> 2];
450 unsigned int tind[BLOCK_SIZE >> 2];
451 int blk_chg, block, result;
454 return check_zone_nr2 (inode->i_zone + blknr, &changed);
457 block = check_zone_nr2 (inode->i_zone + 7, &changed);
458 read_block (block, (char *) ind);
460 result = check_zone_nr2 (blknr + ind, &blk_chg);
462 write_block (block, (char *) ind);
466 if (blknr >= 256 * 256) {
467 block = check_zone_nr2 (inode->i_zone + 8, &changed);
468 read_block (block, (char *) dind);
470 result = check_zone_nr2 (dind + blknr / 256, &blk_chg);
472 write_block (block, (char *) dind);
474 read_block (block, (char *) ind);
476 result = check_zone_nr2 (ind + blknr % 256, &blk_chg);
478 write_block (block, (char *) ind);
482 block = check_zone_nr2 (inode->i_zone + 9, &changed);
483 read_block (block, (char *) tind);
485 result = check_zone_nr2 (tind + blknr / (256 * 256), &blk_chg);
487 write_block (block, (char *) tind);
489 read_block (block, (char *) dind);
491 result = check_zone_nr2 (dind + (blknr / 256) % 256, &blk_chg);
493 write_block (block, (char *) dind);
495 read_block (block, (char *) ind);
497 result = check_zone_nr2 (ind + blknr % 256, &blk_chg);
499 write_block (block, (char *) ind);
504 static void write_super_block(void)
507 * Set the state of the filesystem based on whether or not there
508 * are uncorrected errors. The filesystem valid flag is
509 * unconditionally set if we get this far.
511 Super.s_state |= MINIX_VALID_FS;
512 if ( errors_uncorrected )
513 Super.s_state |= MINIX_ERROR_FS;
515 Super.s_state &= ~MINIX_ERROR_FS;
517 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
518 die("seek failed in write_super_block");
519 if (BLOCK_SIZE != write(IN, super_block_buffer, BLOCK_SIZE))
520 die("unable to write super-block");
525 static void write_tables(void)
529 if (IMAPS*BLOCK_SIZE != write(IN,inode_map,IMAPS*BLOCK_SIZE))
530 die("Unable to write inode map");
531 if (ZMAPS*BLOCK_SIZE != write(IN,zone_map,ZMAPS*BLOCK_SIZE))
532 die("Unable to write zone map");
533 if (INODE_BUFFER_SIZE != write(IN,inode_buffer,INODE_BUFFER_SIZE))
534 die("Unable to write inodes");
537 static void get_dirsize (void)
540 char blk[BLOCK_SIZE];
545 block = Inode2[ROOT_INO].i_zone[0];
548 block = Inode[ROOT_INO].i_zone[0];
549 read_block (block, blk);
550 for (size = 16; size < BLOCK_SIZE; size <<= 1) {
551 if (strcmp (blk + size + 2, "..") == 0) {
560 static void read_superblock(void)
562 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
564 if (BLOCK_SIZE != read(IN, super_block_buffer, BLOCK_SIZE))
565 die("unable to read super block");
566 if (MAGIC == MINIX_SUPER_MAGIC) {
570 } else if (MAGIC == MINIX_SUPER_MAGIC2) {
575 } else if (MAGIC == MINIX2_SUPER_MAGIC) {
579 } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
585 die("bad magic number in super-block");
586 if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
587 die("Only 1k blocks/zones supported");
588 if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
589 die("bad s_imap_blocks field in super-block");
590 if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
591 die("bad s_zmap_blocks field in super-block");
594 static void read_tables(void)
596 inode_map = malloc(IMAPS * BLOCK_SIZE);
598 die("Unable to allocate buffer for inode map");
599 zone_map = malloc(ZMAPS * BLOCK_SIZE);
601 die("Unable to allocate buffer for zone map");
602 memset(inode_map,0,sizeof(inode_map));
603 memset(zone_map,0,sizeof(zone_map));
604 inode_buffer = malloc(INODE_BUFFER_SIZE);
606 die("Unable to allocate buffer for inodes");
607 inode_count = malloc(INODES + 1);
609 die("Unable to allocate buffer for inode count");
610 zone_count = malloc(ZONES);
612 die("Unable to allocate buffer for zone count");
613 if (IMAPS*BLOCK_SIZE != read(IN,inode_map,IMAPS*BLOCK_SIZE))
614 die("Unable to read inode map");
615 if (ZMAPS*BLOCK_SIZE != read(IN,zone_map,ZMAPS*BLOCK_SIZE))
616 die("Unable to read zone map");
617 if (INODE_BUFFER_SIZE != read(IN,inode_buffer,INODE_BUFFER_SIZE))
618 die("Unable to read inodes");
619 if (NORM_FIRSTZONE != FIRSTZONE) {
620 printf("Warning: Firstzone != Norm_firstzone\n");
621 errors_uncorrected = 1;
625 printf("%ld inodes\n",INODES);
626 printf("%ld blocks\n",ZONES);
627 printf("Firstdatazone=%ld (%ld)\n",FIRSTZONE,NORM_FIRSTZONE);
628 printf("Zonesize=%d\n",BLOCK_SIZE<<ZONESIZE);
629 printf("Maxsize=%ld\n",MAXSIZE);
630 printf("Filesystem state=%d\n", Super.s_state);
631 printf("namelen=%d\n\n",namelen);
635 struct minix_inode * get_inode(unsigned int nr)
637 struct minix_inode * inode;
639 if (!nr || nr > INODES)
643 if (!inode_count[nr]) {
644 if (!inode_in_use(nr)) {
645 printf("Inode %d marked not used, but used for file '",
647 print_current_name();
650 if (ask("Mark in use",1))
653 errors_uncorrected = 1;
656 if (S_ISDIR(inode->i_mode))
658 else if (S_ISREG(inode->i_mode))
660 else if (S_ISCHR(inode->i_mode))
662 else if (S_ISBLK(inode->i_mode))
664 else if (S_ISLNK(inode->i_mode))
666 else if (S_ISSOCK(inode->i_mode))
668 else if (S_ISFIFO(inode->i_mode))
671 print_current_name();
672 printf(" has mode %05o\n",inode->i_mode);
677 if (!++inode_count[nr]) {
678 printf("Warning: inode count too big.\n");
680 errors_uncorrected = 1;
686 struct minix2_inode *
687 get_inode2 (unsigned int nr)
689 struct minix2_inode *inode;
691 if (!nr || nr > INODES)
695 if (!inode_count[nr]) {
696 if (!inode_in_use (nr)) {
697 printf ("Inode %d marked not used, but used for file '", nr);
698 print_current_name ();
701 if (ask ("Mark in use", 1))
704 errors_uncorrected = 1;
707 if (S_ISDIR (inode->i_mode))
709 else if (S_ISREG (inode->i_mode))
711 else if (S_ISCHR (inode->i_mode))
713 else if (S_ISBLK (inode->i_mode))
715 else if (S_ISLNK (inode->i_mode))
717 else if (S_ISSOCK (inode->i_mode));
718 else if (S_ISFIFO (inode->i_mode));
720 print_current_name ();
721 printf (" has mode %05o\n", inode->i_mode);
725 if (!++inode_count[nr]) {
726 printf ("Warning: inode count too big.\n");
728 errors_uncorrected = 1;
734 static void check_root(void)
736 struct minix_inode * inode = Inode + ROOT_INO;
738 if (!inode || !S_ISDIR(inode->i_mode))
739 die("root inode isn't a directory");
743 static void check_root2 (void)
745 struct minix2_inode *inode = Inode2 + ROOT_INO;
747 if (!inode || !S_ISDIR (inode->i_mode))
748 die ("root inode isn't a directory");
752 static int add_zone(unsigned short * znr, int * corrected)
758 block = check_zone_nr(znr, corrected);
761 if (zone_count[block]) {
762 printf("Block has been used before. Now in file `");
763 print_current_name();
765 if (ask("Clear",1)) {
773 if (!zone_in_use(block)) {
774 printf("Block %d in file `",block);
775 print_current_name();
776 printf("' is marked not in use.");
777 if (ask("Correct",1))
780 if (!++zone_count[block])
786 static int add_zone2 (unsigned int *znr, int *corrected)
792 block = check_zone_nr2 (znr, corrected);
795 if (zone_count[block]) {
796 printf ("Block has been used before. Now in file `");
797 print_current_name ();
799 if (ask ("Clear", 1)) {
807 if (!zone_in_use (block)) {
808 printf ("Block %d in file `", block);
809 print_current_name ();
810 printf ("' is marked not in use.");
811 if (ask ("Correct", 1))
814 if (!++zone_count[block])
820 static void add_zone_ind(unsigned short * znr, int * corrected)
822 static char blk[BLOCK_SIZE];
826 block = add_zone(znr, corrected);
829 read_block(block, blk);
830 for (i=0 ; i < (BLOCK_SIZE>>1) ; i++)
831 add_zone(i + (unsigned short *) blk, &chg_blk);
833 write_block(block, blk);
838 add_zone_ind2 (unsigned int *znr, int *corrected)
840 static char blk[BLOCK_SIZE];
844 block = add_zone2 (znr, corrected);
847 read_block (block, blk);
848 for (i = 0; i < BLOCK_SIZE >> 2; i++)
849 add_zone2 (i + (unsigned int *) blk, &chg_blk);
851 write_block (block, blk);
855 static void add_zone_dind(unsigned short * znr, int * corrected)
857 static char blk[BLOCK_SIZE];
861 block = add_zone(znr, corrected);
864 read_block(block, blk);
865 for (i=0 ; i < (BLOCK_SIZE>>1) ; i++)
866 add_zone_ind(i + (unsigned short *) blk, &blk_chg);
868 write_block(block, blk);
873 add_zone_dind2 (unsigned int *znr, int *corrected)
875 static char blk[BLOCK_SIZE];
879 block = add_zone2 (znr, corrected);
882 read_block (block, blk);
883 for (i = 0; i < BLOCK_SIZE >> 2; i++)
884 add_zone_ind2 (i + (unsigned int *) blk, &blk_chg);
886 write_block (block, blk);
890 add_zone_tind2 (unsigned int *znr, int *corrected)
892 static char blk[BLOCK_SIZE];
896 block = add_zone2 (znr, corrected);
899 read_block (block, blk);
900 for (i = 0; i < BLOCK_SIZE >> 2; i++)
901 add_zone_dind2 (i + (unsigned int *) blk, &blk_chg);
903 write_block (block, blk);
907 static void check_zones(unsigned int i)
909 struct minix_inode * inode;
911 if (!i || i > INODES)
913 if (inode_count[i] > 1) /* have we counted this file already? */
916 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
917 !S_ISLNK(inode->i_mode))
919 for (i=0 ; i<7 ; i++)
920 add_zone(i + inode->i_zone, &changed);
921 add_zone_ind(7 + inode->i_zone, &changed);
922 add_zone_dind(8 + inode->i_zone, &changed);
927 check_zones2 (unsigned int i)
929 struct minix2_inode *inode;
931 if (!i || i > INODES)
933 if (inode_count[i] > 1) /* have we counted this file already? */
936 if (!S_ISDIR (inode->i_mode) && !S_ISREG (inode->i_mode)
937 && !S_ISLNK (inode->i_mode))
939 for (i = 0; i < 7; i++)
940 add_zone2 (i + inode->i_zone, &changed);
941 add_zone_ind2 (7 + inode->i_zone, &changed);
942 add_zone_dind2 (8 + inode->i_zone, &changed);
943 add_zone_tind2 (9 + inode->i_zone, &changed);
947 static void check_file(struct minix_inode * dir, unsigned int offset)
949 static char blk[BLOCK_SIZE];
950 struct minix_inode * inode;
955 block = map_block(dir,offset/BLOCK_SIZE);
956 read_block(block, blk);
957 name = blk + (offset % BLOCK_SIZE) + 2;
958 ino = * (unsigned short *) (name-2);
960 print_current_name();
961 printf(" contains a bad inode number for file '");
962 printf("%.*s'.",namelen,name);
963 if (ask(" Remove",1)) {
964 *(unsigned short *)(name-2) = 0;
965 write_block(block, blk);
969 if (name_depth < MAX_DEPTH)
970 strncpy (name_list[name_depth], name, namelen);
972 inode = get_inode(ino);
975 if (!inode || strcmp(".",name)) {
976 print_current_name();
977 printf(": bad directory: '.' isn't first\n");
978 errors_uncorrected = 1;
981 if (offset == dirsize) {
982 if (!inode || strcmp("..",name)) {
983 print_current_name();
984 printf(": bad directory: '..' isn't second\n");
985 errors_uncorrected = 1;
990 if (name_depth < MAX_DEPTH)
991 strncpy(name_list[name_depth],name,namelen);
995 printf("%6d %07o %3d ",ino,inode->i_mode,inode->i_nlinks);
996 print_current_name();
997 if (S_ISDIR(inode->i_mode))
1003 if (inode && S_ISDIR(inode->i_mode))
1004 recursive_check(ino);
1011 check_file2 (struct minix2_inode *dir, unsigned int offset)
1013 static char blk[BLOCK_SIZE];
1014 struct minix2_inode *inode;
1019 block = map_block2 (dir, offset / BLOCK_SIZE);
1020 read_block (block, blk);
1021 name = blk + (offset % BLOCK_SIZE) + 2;
1022 ino = *(unsigned short *) (name - 2);
1024 print_current_name ();
1025 printf (" contains a bad inode number for file '");
1026 printf ("%.*s'.", namelen, name);
1027 if (ask (" Remove", 1)) {
1028 *(unsigned short *) (name - 2) = 0;
1029 write_block (block, blk);
1033 if (name_depth < MAX_DEPTH)
1034 strncpy (name_list[name_depth], name, namelen);
1036 inode = get_inode2 (ino);
1039 if (!inode || strcmp (".", name)) {
1040 print_current_name ();
1041 printf (": bad directory: '.' isn't first\n");
1042 errors_uncorrected = 1;
1046 if (offset == dirsize) {
1047 if (!inode || strcmp ("..", name)) {
1048 print_current_name ();
1049 printf (": bad directory: '..' isn't second\n");
1050 errors_uncorrected = 1;
1059 printf ("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1060 print_current_name ();
1061 if (S_ISDIR (inode->i_mode))
1067 if (inode && S_ISDIR (inode->i_mode))
1068 recursive_check2 (ino);
1074 static void recursive_check(unsigned int ino)
1076 struct minix_inode * dir;
1077 unsigned int offset;
1080 if (!S_ISDIR(dir->i_mode))
1081 die("internal error");
1082 if (dir->i_size < 2 * dirsize) {
1083 print_current_name();
1084 printf(": bad directory: size<32");
1085 errors_uncorrected = 1;
1087 for (offset = 0 ; offset < dir->i_size ; offset += dirsize)
1088 check_file(dir,offset);
1093 recursive_check2 (unsigned int ino)
1095 struct minix2_inode *dir;
1096 unsigned int offset;
1099 if (!S_ISDIR (dir->i_mode))
1100 die ("internal error");
1101 if (dir->i_size < 2 * dirsize) {
1102 print_current_name ();
1103 printf (": bad directory: size < 32");
1104 errors_uncorrected = 1;
1106 for (offset = 0; offset < dir->i_size; offset += dirsize)
1107 check_file2 (dir, offset);
1111 static int bad_zone(int i)
1115 if (BLOCK_SIZE*i != lseek(IN, BLOCK_SIZE*i, SEEK_SET))
1116 die("seek failed in bad_zone");
1117 return (BLOCK_SIZE != read(IN, buffer, BLOCK_SIZE));
1120 static void check_counts(void)
1124 for (i=1 ; i <= INODES ; i++) {
1125 if (!inode_in_use(i) && Inode[i].i_mode && warn_mode) {
1126 printf("Inode %d mode not cleared.",i);
1127 if (ask("Clear",1)) {
1128 Inode[i].i_mode = 0;
1132 if (!inode_count[i]) {
1133 if (!inode_in_use(i))
1135 printf("Inode %d not used, marked used in the bitmap.",i);
1140 if (!inode_in_use(i)) {
1141 printf("Inode %d used, marked unused in the bitmap.", i);
1145 if (Inode[i].i_nlinks != inode_count[i]) {
1146 printf("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.",
1147 i,Inode[i].i_mode,Inode[i].i_nlinks,inode_count[i]);
1148 if (ask("Set i_nlinks to count",1)) {
1149 Inode[i].i_nlinks=inode_count[i];
1154 for (i=FIRSTZONE ; i < ZONES ; i++) {
1155 if (zone_in_use(i) == zone_count[i])
1157 if (!zone_count[i]) {
1160 printf("Zone %d: marked in use, no file uses it.",i);
1161 if (ask("Unmark",1))
1165 printf("Zone %d: %sin use, counted=%d\n",
1166 i,zone_in_use(i)?"":"not ",zone_count[i]);
1172 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, inode_count[i]);
1200 if (ask ("Set i_nlinks to count", 1)) {
1201 Inode2[i].i_nlinks = inode_count[i];
1206 for (i = FIRSTZONE; i < ZONES; i++) {
1207 if (zone_in_use (i) == zone_count[i])
1209 if (!zone_count[i]) {
1212 printf ("Zone %d: marked in use, no file uses it.", i);
1213 if (ask ("Unmark", 1))
1217 printf ("Zone %d: %sin use, counted=%d\n",
1218 i, zone_in_use (i) ? "" : "not ", zone_count[i]);
1223 static void check(void)
1225 memset(inode_count,0,(INODES + 1) * sizeof(*inode_count));
1226 memset(zone_count,0,ZONES*sizeof(*zone_count));
1227 check_zones(ROOT_INO);
1228 recursive_check(ROOT_INO);
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);
1245 fsck_minix_main(int argc, char ** argv)
1252 program_name = *argv;
1253 if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
1254 die("bad inode size");
1256 if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
1257 die("bad v2 inode size");
1259 while (argc-- > 1) {
1261 if (argv[0][0] != '-') {
1265 device_name = argv[0];
1266 } else while (*++argv[0])
1267 switch (argv[0][0]) {
1268 case 'l': list=1; break;
1269 case 'a': automatic=1; repair=1; break;
1270 case 'r': automatic=0; repair=1; break;
1271 case 'v': verbose=1; break;
1272 case 's': show=1; break;
1273 case 'm': warn_mode=1; break;
1274 case 'f': force=1; break;
1275 default: show_usage();
1280 check_mount(); /* trying to check a mounted filesystem? */
1281 if (repair && !automatic) {
1282 if (!isatty(0) || !isatty(1))
1283 die("need terminal for interactive repairs");
1285 IN = open(device_name,repair?O_RDWR:O_RDONLY);
1287 die("unable to open '%s'");
1288 for (count=0 ; count<3 ; count++)
1293 * Determine whether or not we should continue with the checking.
1294 * This is based on the status of the filesystem valid and error
1295 * flags and whether or not the -f switch was specified on the
1298 printf("%s, %s\n", program_name, program_version);
1299 if ( !(Super.s_state & MINIX_ERROR_FS) &&
1300 (Super.s_state & MINIX_VALID_FS) &&
1303 printf("%s is clean, no check.\n", device_name);
1307 printf("Forcing filesystem check on %s.\n", device_name);
1309 printf("Filesystem on %s is dirty, needs checking.\n",\
1314 if (repair && !automatic) {
1315 tcgetattr(0,&termios);
1317 tmp.c_lflag &= ~(ICANON|ECHO);
1318 tcsetattr(0,TCSANOW,&tmp);
1335 for (i=1,free=0 ; i <= INODES ; i++)
1336 if (!inode_in_use(i))
1338 printf("\n%6ld inodes used (%ld%%)\n",(INODES-free),
1339 100*(INODES-free)/INODES);
1340 for (i=FIRSTZONE,free=0 ; i < ZONES ; i++)
1341 if (!zone_in_use(i))
1343 printf("%6ld zones used (%ld%%)\n",(ZONES-free),
1344 100*(ZONES-free)/ZONES);
1345 printf("\n%6d regular files\n"
1347 "%6d character device files\n"
1348 "%6d block device files\n"
1350 "%6d symbolic links\n"
1353 regular,directory,chardev,blockdev,
1354 links-2*directory+1,symlinks,total-2*directory+1);
1358 printf( "----------------------------\n"
1359 "FILE SYSTEM HAS BEEN CHANGED\n"
1360 "----------------------------\n");
1361 for (count=0 ; count<3 ; count++)
1365 write_super_block();
1367 if (repair && !automatic)
1368 tcsetattr(0,TCSANOW,&termios);
1372 if (errors_uncorrected)