1 /* vi: set sw=4 ts=4: */
3 * fsck.c - a file system consistency checker for Linux.
5 * (C) 1991, 1992 Linus Torvalds.
7 * Licensed under GPLv2, see file LICENSE in this source tree.
11 * 09.11.91 - made the first rudimentary functions
13 * 10.11.91 - updated, does checking, no repairs yet.
14 * Sent out to the mailing-list for testing.
16 * 14.11.91 - Testing seems to have gone well. Added some
17 * correction-code, and changed some functions.
19 * 15.11.91 - More correction code. Hopefully it notices most
20 * cases now, and tries to do something about them.
22 * 16.11.91 - More corrections (thanks to Mika Jalava). Most
23 * things seem to work now. Yeah, sure.
26 * 19.04.92 - Had to start over again from this old version, as a
27 * kernel bug ate my enhanced fsck in february.
29 * 28.02.93 - added support for different directory entry sizes..
31 * Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with
32 * superblock information
34 * Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform
35 * to that required by fsutil
37 * Mon Jan 3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu)
38 * Added support for file system valid flag. Also
39 * added program_version variable and output of
40 * program name and version number when program
43 * 30.10.94 - added support for v2 filesystem
44 * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
46 * 10.12.94 - added test to prevent checking of mounted fs adapted
47 * from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck
48 * program. (Daniel Quinlan, quinlan@yggdrasil.com)
50 * 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such
51 * for modern libcs (janl@math.uio.no, Nicolai Langfeldt)
53 * 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk
54 * (Russell King). He made them for ARM. It would seem
55 * that the ARM is powerful enough to do this in C whereas
56 * i386 and m64k must use assembly to get it fast >:-)
57 * This should make minix fsck system-independent.
58 * (janl@math.uio.no, Nicolai Langfeldt)
60 * 04.11.96 - Added minor fixes from Andreas Schwab to avoid compiler
61 * warnings. Added mc68k bitops from
62 * Joerg Dorchain <dorchain@mpi-sb.mpg.de>.
64 * 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by
67 * 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org>
68 * - added Native Language Support
71 * I've had no time to add comments - hopefully the function names
72 * are comments enough. As with all file system checkers, this assumes
73 * the file system is quiescent - don't use it on a mounted device
74 * unless you can be sure nobody is writing to it (and remember that the
75 * kernel can write to it when it searches for files).
77 * Usage: fsck [-larvsm] device
78 * -l for a listing of all the filenames
79 * -a for automatic repairs (not implemented)
80 * -r for repairs (interactive) (not implemented)
81 * -v for verbose (tells how many files)
82 * -s for superblock info
83 * -m for minix-like "mode not cleared" warnings
84 * -f force filesystem check even if filesystem marked as valid
86 * The device may be a block device or a image of one, but this isn't
87 * enforced (but it's not much fun on a character device :-).
95 #define BLKGETSIZE _IO(0x12,96) /* return device size */
98 struct BUG_bad_inode_size
{
99 char BUG_bad_inode1_size
[(INODE_SIZE1
* MINIX1_INODES_PER_BLOCK
!= BLOCK_SIZE
) ? -1 : 1];
100 #if ENABLE_FEATURE_MINIX2
101 char BUG_bad_inode2_size
[(INODE_SIZE2
* MINIX2_INODES_PER_BLOCK
!= BLOCK_SIZE
) ? -1 : 1];
107 MINIX1_LINK_MAX
= 250,
108 MINIX2_LINK_MAX
= 65530,
109 MINIX_I_MAP_SLOTS
= 8,
110 MINIX_Z_MAP_SLOTS
= 64,
111 MINIX_V1
= 0x0001, /* original minix fs */
112 MINIX_V2
= 0x0002, /* minix V2 fs */
114 MINIX_NAME_MAX
= 255, /* # chars in a file name */
118 #if !ENABLE_FEATURE_MINIX2
119 enum { version2
= 0 };
122 enum { MAX_DEPTH
= 32 };
127 #if ENABLE_FEATURE_MINIX2
130 smallint changed
; /* is filesystem modified? */
131 smallint errors_uncorrected
; /* flag if some error was not corrected */
132 smallint termios_set
;
135 const char *device_name
;
136 int directory
, regular
, blockdev
, chardev
, links
, symlinks
, total
;
142 unsigned char *inode_count
;
143 unsigned char *zone_count
;
147 char *name_component
[MAX_DEPTH
+1];
150 struct termios sv_termios
;
151 char superblock_buffer
[BLOCK_SIZE
];
152 char add_zone_ind_blk
[BLOCK_SIZE
];
153 char add_zone_dind_blk
[BLOCK_SIZE
];
154 IF_FEATURE_MINIX2(char add_zone_tind_blk
[BLOCK_SIZE
];)
155 char check_file_blk
[BLOCK_SIZE
];
158 char current_name
[MAX_DEPTH
* MINIX_NAME_MAX
];
160 #define G (*ptr_to_globals)
161 #if ENABLE_FEATURE_MINIX2
162 #define version2 (G.version2 )
164 #define changed (G.changed )
165 #define errors_uncorrected (G.errors_uncorrected )
166 #define termios_set (G.termios_set )
167 #define dirsize (G.dirsize )
168 #define namelen (G.namelen )
169 #define device_name (G.device_name )
170 #define directory (G.directory )
171 #define regular (G.regular )
172 #define blockdev (G.blockdev )
173 #define chardev (G.chardev )
174 #define links (G.links )
175 #define symlinks (G.symlinks )
176 #define total (G.total )
177 #define inode_buffer (G.inode_buffer )
178 #define inode_map (G.inode_map )
179 #define zone_map (G.zone_map )
180 #define inode_count (G.inode_count )
181 #define zone_count (G.zone_count )
182 #define name_depth (G.name_depth )
183 #define name_component (G.name_component )
184 #define sv_termios (G.sv_termios )
185 #define superblock_buffer (G.superblock_buffer )
186 #define add_zone_ind_blk (G.add_zone_ind_blk )
187 #define add_zone_dind_blk (G.add_zone_dind_blk )
188 #define add_zone_tind_blk (G.add_zone_tind_blk )
189 #define check_file_blk (G.check_file_blk )
190 #define current_name (G.current_name )
191 #define INIT_G() do { \
192 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
195 current_name[0] = '/'; \
196 /*current_name[1] = '\0';*/ \
197 name_component[0] = ¤t_name[0]; \
201 #define OPTION_STR "larvsmf"
211 #define OPT_list (option_mask32 & OPT_l)
212 #define OPT_automatic (option_mask32 & OPT_a)
213 #define OPT_repair (option_mask32 & OPT_r)
214 #define OPT_verbose (option_mask32 & OPT_v)
215 #define OPT_show (option_mask32 & OPT_s)
216 #define OPT_warn_mode (option_mask32 & OPT_w)
217 #define OPT_force (option_mask32 & OPT_f)
218 /* non-automatic repairs requested? */
219 #define OPT_manual ((option_mask32 & (OPT_a|OPT_r)) == OPT_r)
222 #define Inode1 (((struct minix1_inode *) inode_buffer)-1)
223 #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
225 #define Super (*(struct minix_superblock *)(superblock_buffer))
227 #if ENABLE_FEATURE_MINIX2
228 # define ZONES ((unsigned)(version2 ? Super.s_zones : Super.s_nzones))
230 # define ZONES ((unsigned)(Super.s_nzones))
232 #define INODES ((unsigned)Super.s_ninodes)
233 #define IMAPS ((unsigned)Super.s_imap_blocks)
234 #define ZMAPS ((unsigned)Super.s_zmap_blocks)
235 #define FIRSTZONE ((unsigned)Super.s_firstdatazone)
236 #define ZONESIZE ((unsigned)Super.s_log_zone_size)
237 #define MAXSIZE ((unsigned)Super.s_max_size)
238 #define MAGIC (Super.s_magic)
240 /* gcc likes this more (code is smaller) than macro variant */
241 static ALWAYS_INLINE
unsigned div_roundup(unsigned size
, unsigned n
)
243 return (size
+ n
-1) / n
;
246 #if !ENABLE_FEATURE_MINIX2
247 #define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK)
249 #define INODE_BLOCKS div_roundup(INODES, \
250 (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK))
253 #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
254 #define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS)
256 /* Before you ask "where they come from?": */
257 /* setbit/clrbit are supplied by sys/param.h */
259 static int minix_bit(const char *a
, unsigned i
)
261 return (a
[i
>> 3] & (1<<(i
& 7)));
264 static void minix_setbit(char *a
, unsigned i
)
269 static void minix_clrbit(char *a
, unsigned i
)
275 /* Note: do not assume 0/1, it is 0/nonzero */
276 #define zone_in_use(x) (minix_bit(zone_map,(x)-FIRSTZONE+1))
277 #define inode_in_use(x) (minix_bit(inode_map,(x)))
279 #define mark_inode(x) (minix_setbit(inode_map,(x)))
280 #define unmark_inode(x) (minix_clrbit(inode_map,(x)))
282 #define mark_zone(x) (minix_setbit(zone_map,(x)-FIRSTZONE+1))
283 #define unmark_zone(x) (minix_clrbit(zone_map,(x)-FIRSTZONE+1))
286 static void recursive_check(unsigned ino
);
287 #if ENABLE_FEATURE_MINIX2
288 static void recursive_check2(unsigned ino
);
291 static void die(const char *str
) NORETURN
;
292 static void die(const char *str
)
295 tcsetattr_stdin_TCSANOW(&sv_termios
);
296 bb_error_msg_and_die("%s", str
);
299 static void push_filename(const char *name
)
303 // [0] [1] [2] <-name_component[i]
304 if (name_depth
< MAX_DEPTH
) {
306 char *p
= name_component
[name_depth
];
308 len
= sprintf(p
, "%.*s", namelen
, name
);
309 name_component
[name_depth
+ 1] = p
+ len
;
314 static void pop_filename(void)
317 if (name_depth
< MAX_DEPTH
) {
318 *name_component
[name_depth
] = '\0';
320 current_name
[0] = '/';
321 current_name
[1] = '\0';
326 static int ask(const char *string
, int def
)
332 errors_uncorrected
= 1;
338 errors_uncorrected
= 1;
341 printf(def
? "%s (y/n)? " : "%s (n/y)? ", string
);
347 errors_uncorrected
= 1;
352 c
|= 0x20; /* tolower */
366 errors_uncorrected
= 1;
372 * Make certain that we aren't checking a filesystem that is on a
373 * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
374 * 1994 Theodore Ts'o. Also licensed under GPL.
376 static void check_mount(void)
378 if (find_mount_point(device_name
, 0)) {
380 #if ENABLE_FEATURE_MTAB_SUPPORT
382 * If the root is mounted read-only, then /etc/mtab is
383 * probably not correct; so we won't issue a warning based on
386 int fd
= open(bb_path_mtab_file
, O_RDWR
);
388 if (fd
< 0 && errno
== EROFS
)
392 printf("%s is mounted. ", device_name
);
394 if (isatty(0) && isatty(1))
395 cont
= ask("Do you really want to continue", 0);
397 printf("Check aborted\n");
404 * check_zone_nr checks to see that *nr is a valid zone nr. If it
405 * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
406 * if an error was corrected, and returns the zone (0 for no zone
407 * or a bad zone-number).
409 static int check_zone_nr2(uint32_t *nr
, smallint
*corrected
)
416 else if (*nr
>= ZONES
)
420 printf("Zone nr %s in file '%s'. ", msg
, current_name
);
421 if (ask("Remove block", 1)) {
428 static int check_zone_nr(uint16_t *nr
, smallint
*corrected
)
431 int r
= check_zone_nr2(&nr32
, corrected
);
432 *nr
= (uint16_t)nr32
;
437 * read-block reads block nr into the buffer at addr.
439 static void read_block(unsigned nr
, void *addr
)
442 memset(addr
, 0, BLOCK_SIZE
);
445 xlseek(dev_fd
, BLOCK_SIZE
* nr
, SEEK_SET
);
446 if (BLOCK_SIZE
!= full_read(dev_fd
, addr
, BLOCK_SIZE
)) {
447 printf("%s: bad block %u in file '%s'\n",
448 bb_msg_read_error
, nr
, current_name
);
449 errors_uncorrected
= 1;
450 memset(addr
, 0, BLOCK_SIZE
);
455 * write_block writes block nr to disk.
457 static void write_block(unsigned nr
, void *addr
)
461 if (nr
< FIRSTZONE
|| nr
>= ZONES
) {
462 printf("Internal error: trying to write bad block\n"
463 "Write request ignored\n");
464 errors_uncorrected
= 1;
467 xlseek(dev_fd
, BLOCK_SIZE
* nr
, SEEK_SET
);
468 if (BLOCK_SIZE
!= full_write(dev_fd
, addr
, BLOCK_SIZE
)) {
469 printf("%s: bad block %u in file '%s'\n",
470 bb_msg_write_error
, nr
, current_name
);
471 errors_uncorrected
= 1;
476 * map_block calculates the absolute block nr of a block in a file.
477 * It sets 'changed' if the inode has needed changing, and re-writes
478 * any indirect blocks with errors.
480 static int map_block(struct minix1_inode
*inode
, unsigned blknr
)
482 uint16_t ind
[BLOCK_SIZE
>> 1];
487 return check_zone_nr(inode
->i_zone
+ blknr
, &changed
);
490 block
= check_zone_nr(inode
->i_zone
+ 7, &changed
);
494 block
= check_zone_nr(inode
->i_zone
+ 8, &changed
);
495 read_block(block
, ind
); /* double indirect */
497 result
= check_zone_nr(&ind
[blknr
/ 512], &blk_chg
);
499 write_block(block
, ind
);
502 read_block(block
, ind
);
504 result
= check_zone_nr(&ind
[blknr
% 512], &blk_chg
);
506 write_block(block
, ind
);
510 #if ENABLE_FEATURE_MINIX2
511 static int map_block2(struct minix2_inode
*inode
, unsigned blknr
)
513 uint32_t ind
[BLOCK_SIZE
>> 2];
518 return check_zone_nr2(inode
->i_zone
+ blknr
, &changed
);
521 block
= check_zone_nr2(inode
->i_zone
+ 7, &changed
);
525 if (blknr
< 256 * 256) {
526 block
= check_zone_nr2(inode
->i_zone
+ 8, &changed
);
530 block
= check_zone_nr2(inode
->i_zone
+ 9, &changed
);
531 read_block(block
, ind
); /* triple indirect */
533 result
= check_zone_nr2(&ind
[blknr
/ (256 * 256)], &blk_chg
);
535 write_block(block
, ind
);
538 read_block(block
, ind
); /* double indirect */
540 result
= check_zone_nr2(&ind
[(blknr
/ 256) % 256], &blk_chg
);
542 write_block(block
, ind
);
545 read_block(block
, ind
);
547 result
= check_zone_nr2(&ind
[blknr
% 256], &blk_chg
);
549 write_block(block
, ind
);
554 static void write_superblock(void)
557 * Set the state of the filesystem based on whether or not there
558 * are uncorrected errors. The filesystem valid flag is
559 * unconditionally set if we get this far.
561 Super
.s_state
|= MINIX_VALID_FS
| MINIX_ERROR_FS
;
562 if (!errors_uncorrected
)
563 Super
.s_state
&= ~MINIX_ERROR_FS
;
565 xlseek(dev_fd
, BLOCK_SIZE
, SEEK_SET
);
566 if (BLOCK_SIZE
!= full_write(dev_fd
, superblock_buffer
, BLOCK_SIZE
))
567 die("can't write superblock");
570 static void write_tables(void)
574 if (IMAPS
* BLOCK_SIZE
!= write(dev_fd
, inode_map
, IMAPS
* BLOCK_SIZE
))
575 die("can't write inode map");
576 if (ZMAPS
* BLOCK_SIZE
!= write(dev_fd
, zone_map
, ZMAPS
* BLOCK_SIZE
))
577 die("can't write zone map");
578 if (INODE_BUFFER_SIZE
!= write(dev_fd
, inode_buffer
, INODE_BUFFER_SIZE
))
579 die("can't write inodes");
582 static void get_dirsize(void)
585 char blk
[BLOCK_SIZE
];
588 #if ENABLE_FEATURE_MINIX2
590 block
= Inode2
[MINIX_ROOT_INO
].i_zone
[0];
593 block
= Inode1
[MINIX_ROOT_INO
].i_zone
[0];
594 read_block(block
, blk
);
595 for (size
= 16; size
< BLOCK_SIZE
; size
<<= 1) {
596 if (strcmp(blk
+ size
+ 2, "..") == 0) {
605 static void read_superblock(void)
607 xlseek(dev_fd
, BLOCK_SIZE
, SEEK_SET
);
608 if (BLOCK_SIZE
!= full_read(dev_fd
, superblock_buffer
, BLOCK_SIZE
))
609 die("can't read superblock");
610 /* already initialized to:
615 if (MAGIC
== MINIX1_SUPER_MAGIC
) {
616 } else if (MAGIC
== MINIX1_SUPER_MAGIC2
) {
619 #if ENABLE_FEATURE_MINIX2
620 } else if (MAGIC
== MINIX2_SUPER_MAGIC
) {
622 } else if (MAGIC
== MINIX2_SUPER_MAGIC2
) {
628 die("bad magic number in superblock");
629 if (ZONESIZE
!= 0 || BLOCK_SIZE
!= 1024)
630 die("only 1k blocks/zones supported");
631 if (IMAPS
* BLOCK_SIZE
* 8 < INODES
+ 1)
632 die("bad s_imap_blocks field in superblock");
633 if (ZMAPS
* BLOCK_SIZE
* 8 < ZONES
- FIRSTZONE
+ 1)
634 die("bad s_zmap_blocks field in superblock");
637 static void read_tables(void)
639 inode_map
= xzalloc(IMAPS
* BLOCK_SIZE
);
640 zone_map
= xzalloc(ZMAPS
* BLOCK_SIZE
);
641 inode_buffer
= xmalloc(INODE_BUFFER_SIZE
);
642 inode_count
= xmalloc(INODES
+ 1);
643 zone_count
= xmalloc(ZONES
);
644 if (IMAPS
* BLOCK_SIZE
!= read(dev_fd
, inode_map
, IMAPS
* BLOCK_SIZE
))
645 die("can't read inode map");
646 if (ZMAPS
* BLOCK_SIZE
!= read(dev_fd
, zone_map
, ZMAPS
* BLOCK_SIZE
))
647 die("can't read zone map");
648 if (INODE_BUFFER_SIZE
!= read(dev_fd
, inode_buffer
, INODE_BUFFER_SIZE
))
649 die("can't read inodes");
650 if (NORM_FIRSTZONE
!= FIRSTZONE
) {
651 printf("warning: firstzone!=norm_firstzone\n");
652 errors_uncorrected
= 1;
658 "Firstdatazone=%u (%u)\n"
661 "Filesystem state=%u\n"
665 FIRSTZONE
, NORM_FIRSTZONE
,
666 BLOCK_SIZE
<< ZONESIZE
,
673 static void get_inode_common(unsigned nr
, uint16_t i_mode
)
676 if (!inode_count
[nr
]) {
677 if (!inode_in_use(nr
)) {
678 printf("Inode %d is marked as 'unused', but it is used "
679 "for file '%s'\n", nr
, current_name
);
681 if (ask("Mark as 'in use'", 1))
684 errors_uncorrected
= 1;
689 else if (S_ISREG(i_mode
))
691 else if (S_ISCHR(i_mode
))
693 else if (S_ISBLK(i_mode
))
695 else if (S_ISLNK(i_mode
))
697 else if (S_ISSOCK(i_mode
));
698 else if (S_ISFIFO(i_mode
));
700 printf("%s has mode %05o\n", current_name
, i_mode
);
704 if (!++inode_count
[nr
]) {
705 printf("Warning: inode count too big\n");
707 errors_uncorrected
= 1;
711 static struct minix1_inode
*get_inode(unsigned nr
)
713 struct minix1_inode
*inode
;
715 if (!nr
|| nr
> INODES
)
718 get_inode_common(nr
, inode
->i_mode
);
722 #if ENABLE_FEATURE_MINIX2
723 static struct minix2_inode
*get_inode2(unsigned nr
)
725 struct minix2_inode
*inode
;
727 if (!nr
|| nr
> INODES
)
730 get_inode_common(nr
, inode
->i_mode
);
735 static void check_root(void)
737 struct minix1_inode
*inode
= Inode1
+ MINIX_ROOT_INO
;
739 if (!inode
|| !S_ISDIR(inode
->i_mode
))
740 die("root inode isn't a directory");
743 #if ENABLE_FEATURE_MINIX2
744 static void check_root2(void)
746 struct minix2_inode
*inode
= Inode2
+ MINIX_ROOT_INO
;
748 if (!inode
|| !S_ISDIR(inode
->i_mode
))
749 die("root inode isn't a directory");
752 void check_root2(void);
755 static int add_zone_common(int block
, smallint
*corrected
)
759 if (zone_count
[block
]) {
760 printf("Already used block is reused in file '%s'. ",
762 if (ask("Clear", 1)) {
765 return -1; /* "please zero out *znr" */
768 if (!zone_in_use(block
)) {
769 printf("Block %d in file '%s' is marked as 'unused'. ",
770 block
, current_name
);
771 if (ask("Correct", 1))
774 if (!++zone_count
[block
])
779 static int add_zone(uint16_t *znr
, smallint
*corrected
)
783 block
= check_zone_nr(znr
, corrected
);
784 block
= add_zone_common(block
, corrected
);
792 #if ENABLE_FEATURE_MINIX2
793 static int add_zone2(uint32_t *znr
, smallint
*corrected
)
797 block
= check_zone_nr2(znr
, corrected
);
798 block
= add_zone_common(block
, corrected
);
807 static void add_zone_ind(uint16_t *znr
, smallint
*corrected
)
811 smallint chg_blk
= 0;
813 block
= add_zone(znr
, corrected
);
816 read_block(block
, add_zone_ind_blk
);
817 for (i
= 0; i
< (BLOCK_SIZE
>> 1); i
++)
818 add_zone(i
+ (uint16_t *) add_zone_ind_blk
, &chg_blk
);
820 write_block(block
, add_zone_ind_blk
);
823 #if ENABLE_FEATURE_MINIX2
824 static void add_zone_ind2(uint32_t *znr
, smallint
*corrected
)
828 smallint chg_blk
= 0;
830 block
= add_zone2(znr
, corrected
);
833 read_block(block
, add_zone_ind_blk
);
834 for (i
= 0; i
< BLOCK_SIZE
>> 2; i
++)
835 add_zone2(i
+ (uint32_t *) add_zone_ind_blk
, &chg_blk
);
837 write_block(block
, add_zone_ind_blk
);
841 static void add_zone_dind(uint16_t *znr
, smallint
*corrected
)
845 smallint chg_blk
= 0;
847 block
= add_zone(znr
, corrected
);
850 read_block(block
, add_zone_dind_blk
);
851 for (i
= 0; i
< (BLOCK_SIZE
>> 1); i
++)
852 add_zone_ind(i
+ (uint16_t *) add_zone_dind_blk
, &chg_blk
);
854 write_block(block
, add_zone_dind_blk
);
857 #if ENABLE_FEATURE_MINIX2
858 static void add_zone_dind2(uint32_t *znr
, smallint
*corrected
)
862 smallint chg_blk
= 0;
864 block
= add_zone2(znr
, corrected
);
867 read_block(block
, add_zone_dind_blk
);
868 for (i
= 0; i
< BLOCK_SIZE
>> 2; i
++)
869 add_zone_ind2(i
+ (uint32_t *) add_zone_dind_blk
, &chg_blk
);
871 write_block(block
, add_zone_dind_blk
);
874 static void add_zone_tind2(uint32_t *znr
, smallint
*corrected
)
878 smallint chg_blk
= 0;
880 block
= add_zone2(znr
, corrected
);
883 read_block(block
, add_zone_tind_blk
);
884 for (i
= 0; i
< BLOCK_SIZE
>> 2; i
++)
885 add_zone_dind2(i
+ (uint32_t *) add_zone_tind_blk
, &chg_blk
);
887 write_block(block
, add_zone_tind_blk
);
891 static void check_zones(unsigned i
)
893 struct minix1_inode
*inode
;
895 if (!i
|| i
> INODES
)
897 if (inode_count
[i
] > 1) /* have we counted this file already? */
900 if (!S_ISDIR(inode
->i_mode
)
901 && !S_ISREG(inode
->i_mode
)
902 && !S_ISLNK(inode
->i_mode
)
906 for (i
= 0; i
< 7; i
++)
907 add_zone(i
+ inode
->i_zone
, &changed
);
908 add_zone_ind(7 + inode
->i_zone
, &changed
);
909 add_zone_dind(8 + inode
->i_zone
, &changed
);
912 #if ENABLE_FEATURE_MINIX2
913 static void check_zones2(unsigned i
)
915 struct minix2_inode
*inode
;
917 if (!i
|| i
> INODES
)
919 if (inode_count
[i
] > 1) /* have we counted this file already? */
922 if (!S_ISDIR(inode
->i_mode
) && !S_ISREG(inode
->i_mode
)
923 && !S_ISLNK(inode
->i_mode
))
925 for (i
= 0; i
< 7; i
++)
926 add_zone2(i
+ inode
->i_zone
, &changed
);
927 add_zone_ind2(7 + inode
->i_zone
, &changed
);
928 add_zone_dind2(8 + inode
->i_zone
, &changed
);
929 add_zone_tind2(9 + inode
->i_zone
, &changed
);
933 static void check_file(struct minix1_inode
*dir
, unsigned offset
)
935 struct minix1_inode
*inode
;
940 block
= map_block(dir
, offset
/ BLOCK_SIZE
);
941 read_block(block
, check_file_blk
);
942 name
= check_file_blk
+ (offset
% BLOCK_SIZE
) + 2;
943 ino
= *(uint16_t *) (name
- 2);
945 printf("%s contains a bad inode number for file '%.*s'. ",
946 current_name
, namelen
, name
);
947 if (ask("Remove", 1)) {
948 *(uint16_t *) (name
- 2) = 0;
949 write_block(block
, check_file_blk
);
954 inode
= get_inode(ino
);
957 if (inode
&& LONE_CHAR(name
, '.'))
959 printf("%s: bad directory: '.' isn't first\n", current_name
);
960 errors_uncorrected
= 1;
962 if (offset
== dirsize
) {
963 if (inode
&& strcmp("..", name
) == 0)
965 printf("%s: bad directory: '..' isn't second\n", current_name
);
966 errors_uncorrected
= 1;
973 printf("%6d %07o %3d ", ino
, inode
->i_mode
, inode
->i_nlinks
);
974 printf("%s%s\n", current_name
, S_ISDIR(inode
->i_mode
) ? ":" : "");
977 if (inode
&& S_ISDIR(inode
->i_mode
))
978 recursive_check(ino
);
982 #if ENABLE_FEATURE_MINIX2
983 static void check_file2(struct minix2_inode
*dir
, unsigned offset
)
985 struct minix2_inode
*inode
;
990 block
= map_block2(dir
, offset
/ BLOCK_SIZE
);
991 read_block(block
, check_file_blk
);
992 name
= check_file_blk
+ (offset
% BLOCK_SIZE
) + 2;
993 ino
= *(uint16_t *) (name
- 2);
995 printf("%s contains a bad inode number for file '%.*s'. ",
996 current_name
, namelen
, name
);
997 if (ask("Remove", 1)) {
998 *(uint16_t *) (name
- 2) = 0;
999 write_block(block
, check_file_blk
);
1003 push_filename(name
);
1004 inode
= get_inode2(ino
);
1007 if (inode
&& LONE_CHAR(name
, '.'))
1009 printf("%s: bad directory: '.' isn't first\n", current_name
);
1010 errors_uncorrected
= 1;
1012 if (offset
== dirsize
) {
1013 if (inode
&& strcmp("..", name
) == 0)
1015 printf("%s: bad directory: '..' isn't second\n", current_name
);
1016 errors_uncorrected
= 1;
1020 push_filename(name
);
1023 printf("%6d %07o %3d ", ino
, inode
->i_mode
, inode
->i_nlinks
);
1024 printf("%s%s\n", current_name
, S_ISDIR(inode
->i_mode
) ? ":" : "");
1027 if (inode
&& S_ISDIR(inode
->i_mode
))
1028 recursive_check2(ino
);
1033 static void recursive_check(unsigned ino
)
1035 struct minix1_inode
*dir
;
1039 if (!S_ISDIR(dir
->i_mode
))
1040 die("internal error");
1041 if (dir
->i_size
< 2 * dirsize
) {
1042 printf("%s: bad directory: size<32", current_name
);
1043 errors_uncorrected
= 1;
1045 for (offset
= 0; offset
< dir
->i_size
; offset
+= dirsize
)
1046 check_file(dir
, offset
);
1049 #if ENABLE_FEATURE_MINIX2
1050 static void recursive_check2(unsigned ino
)
1052 struct minix2_inode
*dir
;
1056 if (!S_ISDIR(dir
->i_mode
))
1057 die("internal error");
1058 if (dir
->i_size
< 2 * dirsize
) {
1059 printf("%s: bad directory: size<32", current_name
);
1060 errors_uncorrected
= 1;
1062 for (offset
= 0; offset
< dir
->i_size
; offset
+= dirsize
)
1063 check_file2(dir
, offset
);
1067 static int bad_zone(int i
)
1069 char buffer
[BLOCK_SIZE
];
1071 xlseek(dev_fd
, BLOCK_SIZE
* i
, SEEK_SET
);
1072 return (BLOCK_SIZE
!= full_read(dev_fd
, buffer
, BLOCK_SIZE
));
1075 static void check_counts(void)
1079 for (i
= 1; i
<= INODES
; i
++) {
1080 if (OPT_warn_mode
&& Inode1
[i
].i_mode
&& !inode_in_use(i
)) {
1081 printf("Inode %d has non-zero mode. ", i
);
1082 if (ask("Clear", 1)) {
1083 Inode1
[i
].i_mode
= 0;
1087 if (!inode_count
[i
]) {
1088 if (!inode_in_use(i
))
1090 printf("Unused inode %d is marked as 'used' in the bitmap. ", i
);
1091 if (ask("Clear", 1))
1095 if (!inode_in_use(i
)) {
1096 printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i
);
1100 if (Inode1
[i
].i_nlinks
!= inode_count
[i
]) {
1101 printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
1102 i
, Inode1
[i
].i_mode
, Inode1
[i
].i_nlinks
,
1104 if (ask("Set i_nlinks to count", 1)) {
1105 Inode1
[i
].i_nlinks
= inode_count
[i
];
1110 for (i
= FIRSTZONE
; i
< ZONES
; i
++) {
1111 if ((zone_in_use(i
) != 0) == zone_count
[i
])
1113 if (!zone_count
[i
]) {
1116 printf("Zone %d is marked 'in use', but no file uses it. ", i
);
1117 if (ask("Unmark", 1))
1121 printf("Zone %d: %sin use, counted=%d\n",
1122 i
, zone_in_use(i
) ? "" : "not ", zone_count
[i
]);
1126 #if ENABLE_FEATURE_MINIX2
1127 static void check_counts2(void)
1131 for (i
= 1; i
<= INODES
; i
++) {
1132 if (OPT_warn_mode
&& Inode2
[i
].i_mode
&& !inode_in_use(i
)) {
1133 printf("Inode %d has non-zero mode. ", i
);
1134 if (ask("Clear", 1)) {
1135 Inode2
[i
].i_mode
= 0;
1139 if (!inode_count
[i
]) {
1140 if (!inode_in_use(i
))
1142 printf("Unused inode %d is marked as 'used' in the bitmap. ", i
);
1143 if (ask("Clear", 1))
1147 if (!inode_in_use(i
)) {
1148 printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i
);
1152 if (Inode2
[i
].i_nlinks
!= inode_count
[i
]) {
1153 printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
1154 i
, Inode2
[i
].i_mode
, Inode2
[i
].i_nlinks
,
1156 if (ask("Set i_nlinks to count", 1)) {
1157 Inode2
[i
].i_nlinks
= inode_count
[i
];
1162 for (i
= FIRSTZONE
; i
< ZONES
; i
++) {
1163 if ((zone_in_use(i
) != 0) == zone_count
[i
])
1165 if (!zone_count
[i
]) {
1168 printf("Zone %d is marked 'in use', but no file uses it. ", i
);
1169 if (ask("Unmark", 1))
1173 printf("Zone %d: %sin use, counted=%d\n",
1174 i
, zone_in_use(i
) ? "" : "not ", zone_count
[i
]);
1179 static void check(void)
1181 memset(inode_count
, 0, (INODES
+ 1) * sizeof(*inode_count
));
1182 memset(zone_count
, 0, ZONES
* sizeof(*zone_count
));
1183 check_zones(MINIX_ROOT_INO
);
1184 recursive_check(MINIX_ROOT_INO
);
1188 #if ENABLE_FEATURE_MINIX2
1189 static void check2(void)
1191 memset(inode_count
, 0, (INODES
+ 1) * sizeof(*inode_count
));
1192 memset(zone_count
, 0, ZONES
* sizeof(*zone_count
));
1193 check_zones2(MINIX_ROOT_INO
);
1194 recursive_check2(MINIX_ROOT_INO
);
1201 int fsck_minix_main(int argc
, char **argv
) MAIN_EXTERNALLY_VISIBLE
;
1202 int fsck_minix_main(int argc UNUSED_PARAM
, char **argv
)
1207 xfunc_error_retval
= 8;
1211 opt_complementary
= "=1:ar"; /* one argument; -a assumes -r */
1212 getopt32(argv
, OPTION_STR
);
1214 device_name
= argv
[0];
1216 check_mount(); /* trying to check a mounted filesystem? */
1218 if (!isatty(0) || !isatty(1))
1219 die("need terminal for interactive repairs");
1221 xmove_fd(xopen(device_name
, OPT_repair
? O_RDWR
: O_RDONLY
), dev_fd
);
1223 /*sync(); paranoia? */
1227 * Determine whether or not we should continue with the checking.
1228 * This is based on the status of the filesystem valid and error
1229 * flags and whether or not the -f switch was specified on the
1232 printf("%s: %s\n", applet_name
, bb_banner
);
1234 if (!(Super
.s_state
& MINIX_ERROR_FS
)
1235 && (Super
.s_state
& MINIX_VALID_FS
) && !OPT_force
1238 printf("%s is clean, check is skipped\n", device_name
);
1240 } else if (OPT_force
)
1241 printf("Forcing filesystem check on %s\n", device_name
);
1242 else if (OPT_repair
)
1243 printf("Filesystem on %s is dirty, needs checking\n",
1249 tcgetattr(0, &sv_termios
);
1251 tmp
.c_lflag
&= ~(ICANON
| ECHO
);
1252 tcsetattr_stdin_TCSANOW(&tmp
);
1267 for (i
= 1, free_cnt
= 0; i
<= INODES
; i
++)
1268 if (!inode_in_use(i
))
1270 printf("\n%6u inodes used (%u%%)\n", (INODES
- free_cnt
),
1271 100 * (INODES
- free_cnt
) / INODES
);
1272 for (i
= FIRSTZONE
, free_cnt
= 0; i
< ZONES
; i
++)
1273 if (!zone_in_use(i
))
1275 printf("%6u zones used (%u%%)\n\n"
1276 "%6u regular files\n"
1278 "%6u character device files\n"
1279 "%6u block device files\n"
1281 "%6u symbolic links\n"
1284 (ZONES
- free_cnt
), 100 * (ZONES
- free_cnt
) / ZONES
,
1285 regular
, directory
, chardev
, blockdev
,
1286 links
- 2 * directory
+ 1, symlinks
,
1287 total
- 2 * directory
+ 1);
1291 printf("FILE SYSTEM HAS BEEN CHANGED\n");
1293 } else if (OPT_repair
)
1297 tcsetattr_stdin_TCSANOW(&sv_termios
);
1301 if (errors_uncorrected
)