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) {
195 "Usage: %s [-larvsmf] /dev/name\n",
200 static void die(const char *str) {
201 fprintf(stderr, "%s: %s\n", program_name, str);
206 * This simply goes through the file-name data and prints out the
209 static void print_current_name(void)
214 printf("/%.*s",namelen,name_list[i++]);
219 static int ask(const char * string, int def)
225 errors_uncorrected = 1;
231 errors_uncorrected = 1;
234 printf(def?"%s (y/n)? ":"%s (n/y)? ",string);
237 if ((c=getchar())==EOF) {
239 errors_uncorrected = 1;
246 } else if (c == 'N') {
249 } else if (c == ' ' || c == '\n')
256 errors_uncorrected = 1;
262 * Make certain that we aren't checking a filesystem that is on a
263 * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
264 * 1994 Theodore Ts'o. Also licensed under GPL.
266 static void check_mount(void)
273 if ((f = setmntent (MOUNTED, "r")) == NULL)
275 while ((mnt = getmntent (f)) != NULL)
276 if (strcmp (device_name, mnt->mnt_fsname) == 0)
283 * If the root is mounted read-only, then /etc/mtab is
284 * probably not correct; so we won't issue a warning based on
287 fd = open(MOUNTED, O_RDWR);
288 if (fd < 0 && errno == EROFS)
293 printf ("%s is mounted. ", device_name);
294 if (isatty(0) && isatty(1))
295 cont = ask("Do you really want to continue", 0);
299 printf ("check aborted.\n");
306 * check_zone_nr checks to see that *nr is a valid zone nr. If it
307 * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
308 * if an error was corrected, and returns the zone (0 for no zone
309 * or a bad zone-number).
311 static int check_zone_nr(unsigned short * nr, int * corrected)
316 printf("Zone nr < FIRSTZONE in file `");
317 else if (*nr >= ZONES)
318 printf("Zone nr >= ZONES in file `");
321 print_current_name();
323 if (ask("Remove block",1)) {
331 static int check_zone_nr2 (unsigned int *nr, int *corrected)
336 printf ("Zone nr < FIRSTZONE in file `");
337 else if (*nr >= ZONES)
338 printf ("Zone nr >= ZONES in file `");
341 print_current_name ();
343 if (ask ("Remove block", 1)) {
352 * read-block reads block nr into the buffer at addr.
354 static void read_block(unsigned int nr, char * addr)
357 memset(addr,0,BLOCK_SIZE);
360 if (BLOCK_SIZE*nr != lseek(IN, BLOCK_SIZE*nr, SEEK_SET)) {
361 printf("Read error: unable to seek to block in file '");
362 print_current_name();
364 memset(addr,0,BLOCK_SIZE);
365 errors_uncorrected = 1;
366 } else if (BLOCK_SIZE != read(IN, addr, BLOCK_SIZE)) {
367 printf("Read error: bad block in file '");
368 print_current_name();
370 memset(addr,0,BLOCK_SIZE);
371 errors_uncorrected = 1;
376 * write_block writes block nr to disk.
378 static void write_block(unsigned int nr, char * addr)
382 if (nr < FIRSTZONE || nr >= ZONES) {
383 printf("Internal error: trying to write bad block\n"
384 "Write request ignored\n");
385 errors_uncorrected = 1;
388 if (BLOCK_SIZE*nr != lseek(IN, BLOCK_SIZE*nr, SEEK_SET))
389 die("seek failed in write_block");
390 if (BLOCK_SIZE != write(IN, addr, BLOCK_SIZE)) {
391 printf("Write error: bad block in file '");
392 print_current_name();
394 errors_uncorrected = 1;
399 * map-block calculates the absolute block nr of a block in a file.
400 * It sets 'changed' if the inode has needed changing, and re-writes
401 * any indirect blocks with errors.
403 static int map_block(struct minix_inode * inode, unsigned int blknr)
405 unsigned short ind[BLOCK_SIZE>>1];
406 unsigned short dind[BLOCK_SIZE>>1];
407 int blk_chg, block, result;
410 return check_zone_nr(inode->i_zone + blknr, &changed);
413 block = check_zone_nr(inode->i_zone + 7, &changed);
414 read_block(block, (char *) ind);
416 result = check_zone_nr(blknr + ind, &blk_chg);
418 write_block(block, (char *) ind);
422 block = check_zone_nr(inode->i_zone + 8, &changed);
423 read_block(block, (char *) dind);
425 result = check_zone_nr(dind + (blknr/512), &blk_chg);
427 write_block(block, (char *) dind);
429 read_block(block, (char *) ind);
431 result = check_zone_nr(ind + (blknr%512), &blk_chg);
433 write_block(block, (char *) ind);
438 static int map_block2 (struct minix2_inode *inode, unsigned int blknr)
440 unsigned int ind[BLOCK_SIZE >> 2];
441 unsigned int dind[BLOCK_SIZE >> 2];
442 unsigned int tind[BLOCK_SIZE >> 2];
443 int blk_chg, block, result;
446 return check_zone_nr2 (inode->i_zone + blknr, &changed);
449 block = check_zone_nr2 (inode->i_zone + 7, &changed);
450 read_block (block, (char *) ind);
452 result = check_zone_nr2 (blknr + ind, &blk_chg);
454 write_block (block, (char *) ind);
458 if (blknr >= 256 * 256) {
459 block = check_zone_nr2 (inode->i_zone + 8, &changed);
460 read_block (block, (char *) dind);
462 result = check_zone_nr2 (dind + blknr / 256, &blk_chg);
464 write_block (block, (char *) dind);
466 read_block (block, (char *) ind);
468 result = check_zone_nr2 (ind + blknr % 256, &blk_chg);
470 write_block (block, (char *) ind);
474 block = check_zone_nr2 (inode->i_zone + 9, &changed);
475 read_block (block, (char *) tind);
477 result = check_zone_nr2 (tind + blknr / (256 * 256), &blk_chg);
479 write_block (block, (char *) tind);
481 read_block (block, (char *) dind);
483 result = check_zone_nr2 (dind + (blknr / 256) % 256, &blk_chg);
485 write_block (block, (char *) dind);
487 read_block (block, (char *) ind);
489 result = check_zone_nr2 (ind + blknr % 256, &blk_chg);
491 write_block (block, (char *) ind);
496 static void write_super_block(void)
499 * Set the state of the filesystem based on whether or not there
500 * are uncorrected errors. The filesystem valid flag is
501 * unconditionally set if we get this far.
503 Super.s_state |= MINIX_VALID_FS;
504 if ( errors_uncorrected )
505 Super.s_state |= MINIX_ERROR_FS;
507 Super.s_state &= ~MINIX_ERROR_FS;
509 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
510 die("seek failed in write_super_block");
511 if (BLOCK_SIZE != write(IN, super_block_buffer, BLOCK_SIZE))
512 die("unable to write super-block");
517 static void write_tables(void)
521 if (IMAPS*BLOCK_SIZE != write(IN,inode_map,IMAPS*BLOCK_SIZE))
522 die("Unable to write inode map");
523 if (ZMAPS*BLOCK_SIZE != write(IN,zone_map,ZMAPS*BLOCK_SIZE))
524 die("Unable to write zone map");
525 if (INODE_BUFFER_SIZE != write(IN,inode_buffer,INODE_BUFFER_SIZE))
526 die("Unable to write inodes");
529 static void get_dirsize (void)
532 char blk[BLOCK_SIZE];
537 block = Inode2[ROOT_INO].i_zone[0];
540 block = Inode[ROOT_INO].i_zone[0];
541 read_block (block, blk);
542 for (size = 16; size < BLOCK_SIZE; size <<= 1) {
543 if (strcmp (blk + size + 2, "..") == 0) {
552 static void read_superblock(void)
554 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
556 if (BLOCK_SIZE != read(IN, super_block_buffer, BLOCK_SIZE))
557 die("unable to read super block");
558 if (MAGIC == MINIX_SUPER_MAGIC) {
562 } else if (MAGIC == MINIX_SUPER_MAGIC2) {
567 } else if (MAGIC == MINIX2_SUPER_MAGIC) {
571 } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
577 die("bad magic number in super-block");
578 if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
579 die("Only 1k blocks/zones supported");
580 if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
581 die("bad s_imap_blocks field in super-block");
582 if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
583 die("bad s_zmap_blocks field in super-block");
586 static void read_tables(void)
588 inode_map = malloc(IMAPS * BLOCK_SIZE);
590 die("Unable to allocate buffer for inode map");
591 zone_map = malloc(ZMAPS * BLOCK_SIZE);
593 die("Unable to allocate buffer for zone map");
594 memset(inode_map,0,sizeof(inode_map));
595 memset(zone_map,0,sizeof(zone_map));
596 inode_buffer = malloc(INODE_BUFFER_SIZE);
598 die("Unable to allocate buffer for inodes");
599 inode_count = malloc(INODES + 1);
601 die("Unable to allocate buffer for inode count");
602 zone_count = malloc(ZONES);
604 die("Unable to allocate buffer for zone count");
605 if (IMAPS*BLOCK_SIZE != read(IN,inode_map,IMAPS*BLOCK_SIZE))
606 die("Unable to read inode map");
607 if (ZMAPS*BLOCK_SIZE != read(IN,zone_map,ZMAPS*BLOCK_SIZE))
608 die("Unable to read zone map");
609 if (INODE_BUFFER_SIZE != read(IN,inode_buffer,INODE_BUFFER_SIZE))
610 die("Unable to read inodes");
611 if (NORM_FIRSTZONE != FIRSTZONE) {
612 printf("Warning: Firstzone != Norm_firstzone\n");
613 errors_uncorrected = 1;
617 printf("%ld inodes\n",INODES);
618 printf("%ld blocks\n",ZONES);
619 printf("Firstdatazone=%ld (%ld)\n",FIRSTZONE,NORM_FIRSTZONE);
620 printf("Zonesize=%d\n",BLOCK_SIZE<<ZONESIZE);
621 printf("Maxsize=%ld\n",MAXSIZE);
622 printf("Filesystem state=%d\n", Super.s_state);
623 printf("namelen=%d\n\n",namelen);
627 struct minix_inode * get_inode(unsigned int nr)
629 struct minix_inode * inode;
631 if (!nr || nr > INODES)
635 if (!inode_count[nr]) {
636 if (!inode_in_use(nr)) {
637 printf("Inode %d marked not used, but used for file '",
639 print_current_name();
642 if (ask("Mark in use",1))
645 errors_uncorrected = 1;
648 if (S_ISDIR(inode->i_mode))
650 else if (S_ISREG(inode->i_mode))
652 else if (S_ISCHR(inode->i_mode))
654 else if (S_ISBLK(inode->i_mode))
656 else if (S_ISLNK(inode->i_mode))
658 else if (S_ISSOCK(inode->i_mode))
660 else if (S_ISFIFO(inode->i_mode))
663 print_current_name();
664 printf(" has mode %05o\n",inode->i_mode);
669 if (!++inode_count[nr]) {
670 printf("Warning: inode count too big.\n");
672 errors_uncorrected = 1;
678 struct minix2_inode *
679 get_inode2 (unsigned int nr)
681 struct minix2_inode *inode;
683 if (!nr || nr > INODES)
687 if (!inode_count[nr]) {
688 if (!inode_in_use (nr)) {
689 printf ("Inode %d marked not used, but used for file '", nr);
690 print_current_name ();
693 if (ask ("Mark in use", 1))
696 errors_uncorrected = 1;
699 if (S_ISDIR (inode->i_mode))
701 else if (S_ISREG (inode->i_mode))
703 else if (S_ISCHR (inode->i_mode))
705 else if (S_ISBLK (inode->i_mode))
707 else if (S_ISLNK (inode->i_mode))
709 else if (S_ISSOCK (inode->i_mode));
710 else if (S_ISFIFO (inode->i_mode));
712 print_current_name ();
713 printf (" has mode %05o\n", inode->i_mode);
717 if (!++inode_count[nr]) {
718 printf ("Warning: inode count too big.\n");
720 errors_uncorrected = 1;
726 static void check_root(void)
728 struct minix_inode * inode = Inode + ROOT_INO;
730 if (!inode || !S_ISDIR(inode->i_mode))
731 die("root inode isn't a directory");
735 static void check_root2 (void)
737 struct minix2_inode *inode = Inode2 + ROOT_INO;
739 if (!inode || !S_ISDIR (inode->i_mode))
740 die ("root inode isn't a directory");
744 static int add_zone(unsigned short * znr, int * corrected)
750 block = check_zone_nr(znr, corrected);
753 if (zone_count[block]) {
754 printf("Block has been used before. Now in file `");
755 print_current_name();
757 if (ask("Clear",1)) {
765 if (!zone_in_use(block)) {
766 printf("Block %d in file `",block);
767 print_current_name();
768 printf("' is marked not in use.");
769 if (ask("Correct",1))
772 if (!++zone_count[block])
778 static int add_zone2 (unsigned int *znr, int *corrected)
784 block = check_zone_nr2 (znr, corrected);
787 if (zone_count[block]) {
788 printf ("Block has been used before. Now in file `");
789 print_current_name ();
791 if (ask ("Clear", 1)) {
799 if (!zone_in_use (block)) {
800 printf ("Block %d in file `", block);
801 print_current_name ();
802 printf ("' is marked not in use.");
803 if (ask ("Correct", 1))
806 if (!++zone_count[block])
812 static void add_zone_ind(unsigned short * znr, int * corrected)
814 static char blk[BLOCK_SIZE];
818 block = add_zone(znr, corrected);
821 read_block(block, blk);
822 for (i=0 ; i < (BLOCK_SIZE>>1) ; i++)
823 add_zone(i + (unsigned short *) blk, &chg_blk);
825 write_block(block, blk);
830 add_zone_ind2 (unsigned int *znr, int *corrected)
832 static char blk[BLOCK_SIZE];
836 block = add_zone2 (znr, corrected);
839 read_block (block, blk);
840 for (i = 0; i < BLOCK_SIZE >> 2; i++)
841 add_zone2 (i + (unsigned int *) blk, &chg_blk);
843 write_block (block, blk);
847 static void add_zone_dind(unsigned short * znr, int * corrected)
849 static char blk[BLOCK_SIZE];
853 block = add_zone(znr, corrected);
856 read_block(block, blk);
857 for (i=0 ; i < (BLOCK_SIZE>>1) ; i++)
858 add_zone_ind(i + (unsigned short *) blk, &blk_chg);
860 write_block(block, blk);
865 add_zone_dind2 (unsigned int *znr, int *corrected)
867 static char blk[BLOCK_SIZE];
871 block = add_zone2 (znr, corrected);
874 read_block (block, blk);
875 for (i = 0; i < BLOCK_SIZE >> 2; i++)
876 add_zone_ind2 (i + (unsigned int *) blk, &blk_chg);
878 write_block (block, blk);
882 add_zone_tind2 (unsigned int *znr, int *corrected)
884 static char blk[BLOCK_SIZE];
888 block = add_zone2 (znr, corrected);
891 read_block (block, blk);
892 for (i = 0; i < BLOCK_SIZE >> 2; i++)
893 add_zone_dind2 (i + (unsigned int *) blk, &blk_chg);
895 write_block (block, blk);
899 static void check_zones(unsigned int i)
901 struct minix_inode * inode;
903 if (!i || i > INODES)
905 if (inode_count[i] > 1) /* have we counted this file already? */
908 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
909 !S_ISLNK(inode->i_mode))
911 for (i=0 ; i<7 ; i++)
912 add_zone(i + inode->i_zone, &changed);
913 add_zone_ind(7 + inode->i_zone, &changed);
914 add_zone_dind(8 + inode->i_zone, &changed);
919 check_zones2 (unsigned int i)
921 struct minix2_inode *inode;
923 if (!i || i > INODES)
925 if (inode_count[i] > 1) /* have we counted this file already? */
928 if (!S_ISDIR (inode->i_mode) && !S_ISREG (inode->i_mode)
929 && !S_ISLNK (inode->i_mode))
931 for (i = 0; i < 7; i++)
932 add_zone2 (i + inode->i_zone, &changed);
933 add_zone_ind2 (7 + inode->i_zone, &changed);
934 add_zone_dind2 (8 + inode->i_zone, &changed);
935 add_zone_tind2 (9 + inode->i_zone, &changed);
939 static void check_file(struct minix_inode * dir, unsigned int offset)
941 static char blk[BLOCK_SIZE];
942 struct minix_inode * inode;
947 block = map_block(dir,offset/BLOCK_SIZE);
948 read_block(block, blk);
949 name = blk + (offset % BLOCK_SIZE) + 2;
950 ino = * (unsigned short *) (name-2);
952 print_current_name();
953 printf(" contains a bad inode number for file '");
954 printf("%.*s'.",namelen,name);
955 if (ask(" Remove",1)) {
956 *(unsigned short *)(name-2) = 0;
957 write_block(block, blk);
961 if (name_depth < MAX_DEPTH)
962 strncpy (name_list[name_depth], name, namelen);
964 inode = get_inode(ino);
967 if (!inode || strcmp(".",name)) {
968 print_current_name();
969 printf(": bad directory: '.' isn't first\n");
970 errors_uncorrected = 1;
973 if (offset == dirsize) {
974 if (!inode || strcmp("..",name)) {
975 print_current_name();
976 printf(": bad directory: '..' isn't second\n");
977 errors_uncorrected = 1;
982 if (name_depth < MAX_DEPTH)
983 strncpy(name_list[name_depth],name,namelen);
987 printf("%6d %07o %3d ",ino,inode->i_mode,inode->i_nlinks);
988 print_current_name();
989 if (S_ISDIR(inode->i_mode))
995 if (inode && S_ISDIR(inode->i_mode))
996 recursive_check(ino);
1003 check_file2 (struct minix2_inode *dir, unsigned int offset)
1005 static char blk[BLOCK_SIZE];
1006 struct minix2_inode *inode;
1011 block = map_block2 (dir, offset / BLOCK_SIZE);
1012 read_block (block, blk);
1013 name = blk + (offset % BLOCK_SIZE) + 2;
1014 ino = *(unsigned short *) (name - 2);
1016 print_current_name ();
1017 printf (" contains a bad inode number for file '");
1018 printf ("%.*s'.", namelen, name);
1019 if (ask (" Remove", 1)) {
1020 *(unsigned short *) (name - 2) = 0;
1021 write_block (block, blk);
1025 if (name_depth < MAX_DEPTH)
1026 strncpy (name_list[name_depth], name, namelen);
1028 inode = get_inode2 (ino);
1031 if (!inode || strcmp (".", name)) {
1032 print_current_name ();
1033 printf (": bad directory: '.' isn't first\n");
1034 errors_uncorrected = 1;
1038 if (offset == dirsize) {
1039 if (!inode || strcmp ("..", name)) {
1040 print_current_name ();
1041 printf (": bad directory: '..' isn't second\n");
1042 errors_uncorrected = 1;
1051 printf ("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1052 print_current_name ();
1053 if (S_ISDIR (inode->i_mode))
1059 if (inode && S_ISDIR (inode->i_mode))
1060 recursive_check2 (ino);
1066 static void recursive_check(unsigned int ino)
1068 struct minix_inode * dir;
1069 unsigned int offset;
1072 if (!S_ISDIR(dir->i_mode))
1073 die("internal error");
1074 if (dir->i_size < 2 * dirsize) {
1075 print_current_name();
1076 printf(": bad directory: size<32");
1077 errors_uncorrected = 1;
1079 for (offset = 0 ; offset < dir->i_size ; offset += dirsize)
1080 check_file(dir,offset);
1085 recursive_check2 (unsigned int ino)
1087 struct minix2_inode *dir;
1088 unsigned int offset;
1091 if (!S_ISDIR (dir->i_mode))
1092 die ("internal error");
1093 if (dir->i_size < 2 * dirsize) {
1094 print_current_name ();
1095 printf (": bad directory: size < 32");
1096 errors_uncorrected = 1;
1098 for (offset = 0; offset < dir->i_size; offset += dirsize)
1099 check_file2 (dir, offset);
1103 static int bad_zone(int i)
1107 if (BLOCK_SIZE*i != lseek(IN, BLOCK_SIZE*i, SEEK_SET))
1108 die("seek failed in bad_zone");
1109 return (BLOCK_SIZE != read(IN, buffer, BLOCK_SIZE));
1112 static void check_counts(void)
1116 for (i=1 ; i <= INODES ; i++) {
1117 if (!inode_in_use(i) && Inode[i].i_mode && warn_mode) {
1118 printf("Inode %d mode not cleared.",i);
1119 if (ask("Clear",1)) {
1120 Inode[i].i_mode = 0;
1124 if (!inode_count[i]) {
1125 if (!inode_in_use(i))
1127 printf("Inode %d not used, marked used in the bitmap.",i);
1132 if (!inode_in_use(i)) {
1133 printf("Inode %d used, marked unused in the bitmap.", i);
1137 if (Inode[i].i_nlinks != inode_count[i]) {
1138 printf("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.",
1139 i,Inode[i].i_mode,Inode[i].i_nlinks,inode_count[i]);
1140 if (ask("Set i_nlinks to count",1)) {
1141 Inode[i].i_nlinks=inode_count[i];
1146 for (i=FIRSTZONE ; i < ZONES ; i++) {
1147 if (zone_in_use(i) == zone_count[i])
1149 if (!zone_count[i]) {
1152 printf("Zone %d: marked in use, no file uses it.",i);
1153 if (ask("Unmark",1))
1157 printf("Zone %d: %sin use, counted=%d\n",
1158 i,zone_in_use(i)?"":"not ",zone_count[i]);
1164 check_counts2 (void)
1168 for (i = 1; i <= INODES; i++) {
1169 if (!inode_in_use (i) && Inode2[i].i_mode && warn_mode) {
1170 printf ("Inode %d mode not cleared.", i);
1171 if (ask ("Clear", 1)) {
1172 Inode2[i].i_mode = 0;
1176 if (!inode_count[i]) {
1177 if (!inode_in_use (i))
1179 printf ("Inode %d not used, marked used in the bitmap.", i);
1180 if (ask ("Clear", 1))
1184 if (!inode_in_use (i)) {
1185 printf ("Inode %d used, marked unused in the bitmap.", i);
1189 if (Inode2[i].i_nlinks != inode_count[i]) {
1190 printf ("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.",
1191 i, Inode2[i].i_mode, Inode2[i].i_nlinks, inode_count[i]);
1192 if (ask ("Set i_nlinks to count", 1)) {
1193 Inode2[i].i_nlinks = inode_count[i];
1198 for (i = FIRSTZONE; i < ZONES; i++) {
1199 if (zone_in_use (i) == zone_count[i])
1201 if (!zone_count[i]) {
1204 printf ("Zone %d: marked in use, no file uses it.", i);
1205 if (ask ("Unmark", 1))
1209 printf ("Zone %d: %sin use, counted=%d\n",
1210 i, zone_in_use (i) ? "" : "not ", zone_count[i]);
1215 static void check(void)
1217 memset(inode_count,0,(INODES + 1) * sizeof(*inode_count));
1218 memset(zone_count,0,ZONES*sizeof(*zone_count));
1219 check_zones(ROOT_INO);
1220 recursive_check(ROOT_INO);
1228 memset (inode_count, 0, (INODES + 1) * sizeof (*inode_count));
1229 memset (zone_count, 0, ZONES * sizeof (*zone_count));
1230 check_zones2 (ROOT_INO);
1231 recursive_check2 (ROOT_INO);
1237 fsck_minix_main(int argc, char ** argv)
1244 program_name = *argv;
1245 if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
1246 die("bad inode size");
1248 if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
1249 die("bad v2 inode size");
1251 while (argc-- > 1) {
1253 if (argv[0][0] != '-') {
1257 device_name = argv[0];
1258 } else while (*++argv[0])
1259 switch (argv[0][0]) {
1260 case 'l': list=1; break;
1261 case 'a': automatic=1; repair=1; break;
1262 case 'r': automatic=0; repair=1; break;
1263 case 'v': verbose=1; break;
1264 case 's': show=1; break;
1265 case 'm': warn_mode=1; break;
1266 case 'f': force=1; break;
1267 default: show_usage();
1272 check_mount(); /* trying to check a mounted filesystem? */
1273 if (repair && !automatic) {
1274 if (!isatty(0) || !isatty(1))
1275 die("need terminal for interactive repairs");
1277 IN = open(device_name,repair?O_RDWR:O_RDONLY);
1279 die("unable to open '%s'");
1280 for (count=0 ; count<3 ; count++)
1285 * Determine whether or not we should continue with the checking.
1286 * This is based on the status of the filesystem valid and error
1287 * flags and whether or not the -f switch was specified on the
1290 printf("%s, %s\n", program_name, program_version);
1291 if ( !(Super.s_state & MINIX_ERROR_FS) &&
1292 (Super.s_state & MINIX_VALID_FS) &&
1295 printf("%s is clean, no check.\n", device_name);
1299 printf("Forcing filesystem check on %s.\n", device_name);
1301 printf("Filesystem on %s is dirty, needs checking.\n",\
1306 if (repair && !automatic) {
1307 tcgetattr(0,&termios);
1309 tmp.c_lflag &= ~(ICANON|ECHO);
1310 tcsetattr(0,TCSANOW,&tmp);
1327 for (i=1,free=0 ; i <= INODES ; i++)
1328 if (!inode_in_use(i))
1330 printf("\n%6ld inodes used (%ld%%)\n",(INODES-free),
1331 100*(INODES-free)/INODES);
1332 for (i=FIRSTZONE,free=0 ; i < ZONES ; i++)
1333 if (!zone_in_use(i))
1335 printf("%6ld zones used (%ld%%)\n",(ZONES-free),
1336 100*(ZONES-free)/ZONES);
1337 printf("\n%6d regular files\n"
1339 "%6d character device files\n"
1340 "%6d block device files\n"
1342 "%6d symbolic links\n"
1345 regular,directory,chardev,blockdev,
1346 links-2*directory+1,symlinks,total-2*directory+1);
1350 printf( "----------------------------\n"
1351 "FILE SYSTEM HAS BEEN CHANGED\n"
1352 "----------------------------\n");
1353 for (count=0 ; count<3 ; count++)
1357 write_super_block();
1359 if (repair && !automatic)
1360 tcsetattr(0,TCSANOW,&termios);
1364 if (errors_uncorrected)