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 Miïż½kiewicz <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)