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 tarball for details.
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 * super-block 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 Mi¶kiewicz <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 super-block 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 :-).
96 #define BLKGETSIZE _IO(0x12,96) /* return device size */
101 MINIX1_LINK_MAX = 250,
102 MINIX2_LINK_MAX = 65530,
103 MINIX_I_MAP_SLOTS = 8,
104 MINIX_Z_MAP_SLOTS = 64,
105 MINIX_V1 = 0x0001, /* original minix fs */
106 MINIX_V2 = 0x0002, /* minix V2 fs */
107 NAME_MAX = 255, /* # chars in a file name */
111 #if ENABLE_FEATURE_MINIX2
112 static smallint version2;
114 enum { version2 = 0 };
117 #define PROGRAM_VERSION "1.2 - 11/11/96"
118 static smallint repair, automatic, verbose, list, show, warn_mode, force;
119 static smallint changed; /* is filesystem modified? */
120 static smallint errors_uncorrected; /* flag if some error was not corrected */
122 static smallint termios_set;
123 static struct termios termios;
125 static char *device_name;
127 static int directory, regular, blockdev, chardev, links, symlinks, total;
130 static int dirsize = 16;
131 static int namelen = 14;
133 static char *inode_buffer;
135 static char super_block_buffer[BLOCK_SIZE];
137 #define Inode1 (((struct minix1_inode *) inode_buffer)-1)
138 #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
140 #define Super (*(struct minix_super_block *)super_block_buffer)
142 #if ENABLE_FEATURE_MINIX2
143 # define ZONES ((unsigned)(version2 ? Super.s_zones : Super.s_nzones))
145 # define ZONES ((unsigned)(Super.s_nzones))
147 #define INODES ((unsigned)Super.s_ninodes)
148 #define IMAPS ((unsigned)Super.s_imap_blocks)
149 #define ZMAPS ((unsigned)Super.s_zmap_blocks)
150 #define FIRSTZONE ((unsigned)Super.s_firstdatazone)
151 #define ZONESIZE ((unsigned)Super.s_log_zone_size)
152 #define MAXSIZE ((unsigned)Super.s_max_size)
153 #define MAGIC (Super.s_magic)
155 /* gcc likes this more (code is smaller) than macro variant */
156 static ATTRIBUTE_ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
158 return (size + n-1) / n;
161 #if ENABLE_FEATURE_MINIX2
162 #define INODE_BLOCKS div_roundup(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
163 : MINIX1_INODES_PER_BLOCK))
165 #define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK)
168 #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
169 #define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS)
171 static char *inode_map;
172 static char *zone_map;
174 static unsigned char *inode_count;
175 static unsigned char *zone_count;
177 static int bit(const char *a, unsigned i)
179 return (a[i >> 3] & (1<<(i & 7)));
182 /* setbit/clrbit are supplied by sys/param.h */
184 /* Note: do not assume 0/1, it is 0/nonzero */
185 #define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1))
186 #define inode_in_use(x) (bit(inode_map,(x)))
188 #define mark_inode(x) (setbit(inode_map,(x)),changed=1)
189 #define unmark_inode(x) (clrbit(inode_map,(x)),changed=1)
191 #define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1),changed=1)
192 #define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1),changed=1)
195 static void recursive_check(unsigned ino);
196 #if ENABLE_FEATURE_MINIX2
197 static void recursive_check2(unsigned ino);
200 static void die(const char *str) ATTRIBUTE_NORETURN;
201 static void die(const char *str)
204 tcsetattr(0, TCSANOW, &termios);
205 bb_error_msg_and_die("%s", str);
209 enum { MAX_DEPTH = 32 };
210 static int name_depth;
211 static char *current_name;
212 static char *name_component[MAX_DEPTH+1];
214 /* Wed Feb 9 15:17:06 MST 2000 */
215 /* dynamically allocate name_list (instead of making it static) */
216 static void alloc_current_name(void)
218 current_name = xmalloc(MAX_DEPTH * (BUFSIZ + 1));
219 current_name[0] = '/';
220 current_name[1] = '\0';
221 name_component[0] = ¤t_name[0];
224 #if ENABLE_FEATURE_CLEAN_UP
225 /* execute this atexit() to deallocate name_list[] */
226 /* piptigger was here */
227 static void free_current_name(void)
233 static void push_filename(const char *name)
237 // [0] [1] [2] <-name_component[i]
238 if (name_depth < MAX_DEPTH) {
240 char *p = name_component[name_depth];
242 len = sprintf(p, "%.*s", namelen, name);
243 name_component[name_depth + 1] = p + len;
248 static void pop_filename(void)
251 if (name_depth < MAX_DEPTH) {
252 *name_component[name_depth] = '\0';
254 current_name[0] = '/';
255 current_name[1] = '\0';
260 static int ask(const char *string, int def)
266 errors_uncorrected = 1;
272 errors_uncorrected = 1;
275 printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
281 errors_uncorrected = 1;
288 } else if (c == 'N') {
291 } else if (c == ' ' || c == '\n')
298 errors_uncorrected = 1;
304 * Make certain that we aren't checking a filesystem that is on a
305 * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
306 * 1994 Theodore Ts'o. Also licensed under GPL.
308 static void check_mount(void)
315 f = setmntent(MOUNTED, "r");
318 while ((mnt = getmntent(f)) != NULL)
319 if (strcmp(device_name, mnt->mnt_fsname) == 0)
326 * If the root is mounted read-only, then /etc/mtab is
327 * probably not correct; so we won't issue a warning based on
330 fd = open(MOUNTED, O_RDWR);
331 if (fd < 0 && errno == EROFS)
335 printf("%s is mounted. ", device_name);
337 if (isatty(0) && isatty(1))
338 cont = ask("Do you really want to continue", 0);
340 printf("Check aborted\n");
346 * check_zone_nr checks to see that *nr is a valid zone nr. If it
347 * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
348 * if an error was corrected, and returns the zone (0 for no zone
349 * or a bad zone-number).
351 static int check_zone_nr2(uint32_t *nr, smallint *corrected)
358 else if (*nr >= ZONES)
362 printf("Zone nr %s in file '%s'. ", msg, current_name);
363 if (ask("Remove block", 1)) {
370 static int check_zone_nr(uint16_t *nr, smallint *corrected)
373 int r = check_zone_nr2(&nr32, corrected);
374 *nr = (uint16_t)nr32;
379 * read-block reads block nr into the buffer at addr.
381 static void read_block(unsigned nr, char *addr)
384 memset(addr, 0, BLOCK_SIZE);
387 if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET)) {
388 printf("%s: cannot seek to block in file '%s'\n",
389 bb_msg_read_error, current_name);
390 errors_uncorrected = 1;
391 memset(addr, 0, BLOCK_SIZE);
392 } else if (BLOCK_SIZE != read(IN, addr, BLOCK_SIZE)) {
393 printf("%s: bad block in file '%s'\n",
394 bb_msg_read_error, current_name);
395 errors_uncorrected = 1;
396 memset(addr, 0, BLOCK_SIZE);
401 * write_block writes block nr to disk.
403 static void write_block(unsigned nr, char *addr)
407 if (nr < FIRSTZONE || nr >= ZONES) {
408 printf("Internal error: trying to write bad block\n"
409 "Write request ignored\n");
410 errors_uncorrected = 1;
413 if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET))
414 die("seek failed in write_block");
415 if (BLOCK_SIZE != write(IN, addr, BLOCK_SIZE)) {
416 printf("%s: bad block in file '%s'\n",
417 bb_msg_write_error, current_name);
418 errors_uncorrected = 1;
423 * map_block calculates the absolute block nr of a block in a file.
424 * It sets 'changed' if the inode has needed changing, and re-writes
425 * any indirect blocks with errors.
427 static int map_block(struct minix1_inode *inode, unsigned blknr)
429 uint16_t ind[BLOCK_SIZE >> 1];
430 uint16_t dind[BLOCK_SIZE >> 1];
435 return check_zone_nr(inode->i_zone + blknr, &changed);
438 block = check_zone_nr(inode->i_zone + 7, &changed);
439 read_block(block, (char *) ind);
441 result = check_zone_nr(blknr + ind, &blk_chg);
443 write_block(block, (char *) ind);
447 block = check_zone_nr(inode->i_zone + 8, &changed);
448 read_block(block, (char *) dind);
450 result = check_zone_nr(dind + (blknr / 512), &blk_chg);
452 write_block(block, (char *) dind);
454 read_block(block, (char *) ind);
456 result = check_zone_nr(ind + (blknr % 512), &blk_chg);
458 write_block(block, (char *) ind);
462 #if ENABLE_FEATURE_MINIX2
463 static int map_block2(struct minix2_inode *inode, unsigned blknr)
465 uint32_t ind[BLOCK_SIZE >> 2];
466 uint32_t dind[BLOCK_SIZE >> 2];
467 uint32_t tind[BLOCK_SIZE >> 2];
472 return check_zone_nr2(inode->i_zone + blknr, &changed);
475 block = check_zone_nr2(inode->i_zone + 7, &changed);
476 read_block(block, (char *) ind);
478 result = check_zone_nr2(blknr + ind, &blk_chg);
480 write_block(block, (char *) ind);
484 if (blknr >= 256 * 256) {
485 block = check_zone_nr2(inode->i_zone + 8, &changed);
486 read_block(block, (char *) dind);
488 result = check_zone_nr2(dind + blknr / 256, &blk_chg);
490 write_block(block, (char *) dind);
492 read_block(block, (char *) ind);
494 result = check_zone_nr2(ind + blknr % 256, &blk_chg);
496 write_block(block, (char *) ind);
500 block = check_zone_nr2(inode->i_zone + 9, &changed);
501 read_block(block, (char *) tind);
503 result = check_zone_nr2(tind + blknr / (256 * 256), &blk_chg);
505 write_block(block, (char *) tind);
507 read_block(block, (char *) dind);
509 result = check_zone_nr2(dind + (blknr / 256) % 256, &blk_chg);
511 write_block(block, (char *) dind);
513 read_block(block, (char *) ind);
515 result = check_zone_nr2(ind + blknr % 256, &blk_chg);
517 write_block(block, (char *) ind);
522 static void write_super_block(void)
525 * Set the state of the filesystem based on whether or not there
526 * are uncorrected errors. The filesystem valid flag is
527 * unconditionally set if we get this far.
529 Super.s_state |= MINIX_VALID_FS | MINIX_ERROR_FS;
530 if (!errors_uncorrected)
531 Super.s_state &= ~MINIX_ERROR_FS;
533 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
534 die("seek failed in write_super_block");
535 if (BLOCK_SIZE != write(IN, super_block_buffer, BLOCK_SIZE))
536 die("cannot write super-block");
539 static void write_tables(void)
543 if (IMAPS * BLOCK_SIZE != write(IN, inode_map, IMAPS * BLOCK_SIZE))
544 die("cannot write inode map");
545 if (ZMAPS * BLOCK_SIZE != write(IN, zone_map, ZMAPS * BLOCK_SIZE))
546 die("cannot write zone map");
547 if (INODE_BUFFER_SIZE != write(IN, inode_buffer, INODE_BUFFER_SIZE))
548 die("cannot write inodes");
551 static void get_dirsize(void)
554 char blk[BLOCK_SIZE];
557 #if ENABLE_FEATURE_MINIX2
559 block = Inode2[MINIX_ROOT_INO].i_zone[0];
562 block = Inode1[MINIX_ROOT_INO].i_zone[0];
563 read_block(block, blk);
564 for (size = 16; size < BLOCK_SIZE; size <<= 1) {
565 if (strcmp(blk + size + 2, "..") == 0) {
574 static void read_superblock(void)
576 if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
578 if (BLOCK_SIZE != read(IN, super_block_buffer, BLOCK_SIZE))
579 die("cannot read super block");
580 /* already initialized to:
585 if (MAGIC == MINIX1_SUPER_MAGIC) {
586 } else if (MAGIC == MINIX1_SUPER_MAGIC2) {
589 #if ENABLE_FEATURE_MINIX2
590 } else if (MAGIC == MINIX2_SUPER_MAGIC) {
592 } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
598 die("bad magic number in super-block");
599 if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
600 die("only 1k blocks/zones supported");
601 if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
602 die("bad s_imap_blocks field in super-block");
603 if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
604 die("bad s_zmap_blocks field in super-block");
607 static void read_tables(void)
609 inode_map = xzalloc(IMAPS * BLOCK_SIZE);
610 zone_map = xzalloc(ZMAPS * BLOCK_SIZE);
611 inode_buffer = xmalloc(INODE_BUFFER_SIZE);
612 inode_count = xmalloc(INODES + 1);
613 zone_count = xmalloc(ZONES);
614 if (IMAPS * BLOCK_SIZE != read(IN, inode_map, IMAPS * BLOCK_SIZE))
615 die("cannot read inode map");
616 if (ZMAPS * BLOCK_SIZE != read(IN, zone_map, ZMAPS * BLOCK_SIZE))
617 die("cannot read zone map");
618 if (INODE_BUFFER_SIZE != read(IN, inode_buffer, INODE_BUFFER_SIZE))
619 die("cannot read inodes");
620 if (NORM_FIRSTZONE != FIRSTZONE) {
621 printf("warning: firstzone!=norm_firstzone\n");
622 errors_uncorrected = 1;
628 "Firstdatazone=%u (%u)\n"
631 "Filesystem state=%u\n"
635 FIRSTZONE, NORM_FIRSTZONE,
636 BLOCK_SIZE << ZONESIZE,
643 static struct minix1_inode *get_inode(unsigned nr)
645 struct minix1_inode *inode;
647 if (!nr || nr > INODES)
651 if (!inode_count[nr]) {
652 if (!inode_in_use(nr)) {
653 printf("Inode %d is marked as 'unused', but it is used "
654 "for file '%s'\n", nr, current_name);
656 if (ask("Mark as 'in use'", 1))
659 errors_uncorrected = 1;
662 if (S_ISDIR(inode->i_mode))
664 else if (S_ISREG(inode->i_mode))
666 else if (S_ISCHR(inode->i_mode))
668 else if (S_ISBLK(inode->i_mode))
670 else if (S_ISLNK(inode->i_mode))
672 else if (S_ISSOCK(inode->i_mode));
673 else if (S_ISFIFO(inode->i_mode));
675 printf("%s has mode %05o\n", current_name, inode->i_mode);
680 if (!++inode_count[nr]) {
681 printf("Warning: inode count too big\n");
683 errors_uncorrected = 1;
688 #if ENABLE_FEATURE_MINIX2
689 static struct minix2_inode *get_inode2(unsigned nr)
691 struct minix2_inode *inode;
693 if (!nr || nr > INODES)
697 if (!inode_count[nr]) {
698 if (!inode_in_use(nr)) {
699 printf("Inode %d is marked as 'unused', but it is used "
700 "for file '%s'\n", nr, current_name);
702 if (ask("Mark as 'in use'", 1))
705 errors_uncorrected = 1;
708 if (S_ISDIR(inode->i_mode))
710 else if (S_ISREG(inode->i_mode))
712 else if (S_ISCHR(inode->i_mode))
714 else if (S_ISBLK(inode->i_mode))
716 else if (S_ISLNK(inode->i_mode))
718 else if (S_ISSOCK(inode->i_mode));
719 else if (S_ISFIFO(inode->i_mode));
721 printf("%s has mode %05o\n", current_name, 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 minix1_inode *inode = Inode1 + MINIX_ROOT_INO;
738 if (!inode || !S_ISDIR(inode->i_mode))
739 die("root inode isn't a directory");
742 #if ENABLE_FEATURE_MINIX2
743 static void check_root2(void)
745 struct minix2_inode *inode = Inode2 + MINIX_ROOT_INO;
747 if (!inode || !S_ISDIR(inode->i_mode))
748 die("root inode isn't a directory");
751 void check_root2(void);
754 static int add_zone(uint16_t *znr, smallint *corrected)
760 block = check_zone_nr(znr, corrected);
763 if (zone_count[block]) {
764 printf("Already used block is reused in file '%s'. ",
766 if (ask("Clear", 1)) {
773 if (!zone_in_use(block)) {
774 printf("Block %d in file '%s' is marked as 'unused'. ",
775 block, current_name);
776 if (ask("Correct", 1))
779 if (!++zone_count[block])
784 #if ENABLE_FEATURE_MINIX2
785 static int add_zone2(uint32_t *znr, smallint *corrected)
791 block = check_zone_nr2(znr, corrected);
794 if (zone_count[block]) {
795 printf("Already used block is reused in file '%s'. ",
797 if (ask("Clear", 1)) {
804 if (!zone_in_use(block)) {
805 printf("Block %d in file '%s' is marked as 'unused'. ",
806 block, current_name);
807 if (ask("Correct", 1))
810 if (!++zone_count[block])
816 static void add_zone_ind(uint16_t *znr, smallint *corrected)
818 static char blk[BLOCK_SIZE];
821 smallint chg_blk = 0;
823 block = add_zone(znr, corrected);
826 read_block(block, blk);
827 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
828 add_zone(i + (uint16_t *) blk, &chg_blk);
830 write_block(block, blk);
833 #if ENABLE_FEATURE_MINIX2
834 static void add_zone_ind2(uint32_t *znr, smallint *corrected)
836 static char blk[BLOCK_SIZE];
839 smallint chg_blk = 0;
841 block = add_zone2(znr, corrected);
844 read_block(block, blk);
845 for (i = 0; i < BLOCK_SIZE >> 2; i++)
846 add_zone2(i + (uint32_t *) blk, &chg_blk);
848 write_block(block, blk);
852 static void add_zone_dind(uint16_t *znr, smallint *corrected)
854 static char blk[BLOCK_SIZE];
857 smallint chg_blk = 0;
859 block = add_zone(znr, corrected);
862 read_block(block, blk);
863 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
864 add_zone_ind(i + (uint16_t *) blk, &chg_blk);
866 write_block(block, blk);
869 #if ENABLE_FEATURE_MINIX2
870 static void add_zone_dind2(uint32_t *znr, smallint *corrected)
872 static char blk[BLOCK_SIZE];
875 smallint chg_blk = 0;
877 block = add_zone2(znr, corrected);
880 read_block(block, blk);
881 for (i = 0; i < BLOCK_SIZE >> 2; i++)
882 add_zone_ind2(i + (uint32_t *) blk, &chg_blk);
884 write_block(block, blk);
887 static void add_zone_tind2(uint32_t *znr, smallint *corrected)
889 static char blk[BLOCK_SIZE];
892 smallint chg_blk = 0;
894 block = add_zone2(znr, corrected);
897 read_block(block, blk);
898 for (i = 0; i < BLOCK_SIZE >> 2; i++)
899 add_zone_dind2(i + (uint32_t *) blk, &chg_blk);
901 write_block(block, blk);
905 static void check_zones(unsigned i)
907 struct minix1_inode *inode;
909 if (!i || i > INODES)
911 if (inode_count[i] > 1) /* have we counted this file already? */
914 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
915 !S_ISLNK(inode->i_mode)) return;
916 for (i = 0; i < 7; i++)
917 add_zone(i + inode->i_zone, &changed);
918 add_zone_ind(7 + inode->i_zone, &changed);
919 add_zone_dind(8 + inode->i_zone, &changed);
922 #if ENABLE_FEATURE_MINIX2
923 static void check_zones2(unsigned i)
925 struct minix2_inode *inode;
927 if (!i || i > INODES)
929 if (inode_count[i] > 1) /* have we counted this file already? */
932 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
933 && !S_ISLNK(inode->i_mode))
935 for (i = 0; i < 7; i++)
936 add_zone2(i + inode->i_zone, &changed);
937 add_zone_ind2(7 + inode->i_zone, &changed);
938 add_zone_dind2(8 + inode->i_zone, &changed);
939 add_zone_tind2(9 + inode->i_zone, &changed);
943 static void check_file(struct minix1_inode *dir, unsigned offset)
945 static char blk[BLOCK_SIZE];
946 struct minix1_inode *inode;
951 block = map_block(dir, offset / BLOCK_SIZE);
952 read_block(block, blk);
953 name = blk + (offset % BLOCK_SIZE) + 2;
954 ino = *(uint16_t *) (name - 2);
956 printf("%s contains a bad inode number for file '%.*s'. ",
957 current_name, namelen, name);
958 if (ask("Remove", 1)) {
959 *(uint16_t *) (name - 2) = 0;
960 write_block(block, blk);
965 inode = get_inode(ino);
968 if (inode && LONE_CHAR(name, '.'))
970 printf("%s: bad directory: '.' isn't first\n", current_name);
971 errors_uncorrected = 1;
973 if (offset == dirsize) {
974 if (inode && strcmp("..", name) == 0)
976 printf("%s: bad directory: '..' isn't second\n", current_name);
977 errors_uncorrected = 1;
984 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
985 printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
988 if (inode && S_ISDIR(inode->i_mode))
989 recursive_check(ino);
993 #if ENABLE_FEATURE_MINIX2
994 static void check_file2(struct minix2_inode *dir, unsigned offset)
996 static char blk[BLOCK_SIZE];
997 struct minix2_inode *inode;
1002 block = map_block2(dir, offset / BLOCK_SIZE);
1003 read_block(block, blk);
1004 name = blk + (offset % BLOCK_SIZE) + 2;
1005 ino = *(uint16_t *) (name - 2);
1007 printf("%s contains a bad inode number for file '%.*s'. ",
1008 current_name, namelen, name);
1009 if (ask("Remove", 1)) {
1010 *(uint16_t *) (name - 2) = 0;
1011 write_block(block, blk);
1015 push_filename(name);
1016 inode = get_inode2(ino);
1019 if (inode && LONE_CHAR(name, '.'))
1021 printf("%s: bad directory: '.' isn't first\n", current_name);
1022 errors_uncorrected = 1;
1024 if (offset == dirsize) {
1025 if (inode && strcmp("..", name) == 0)
1027 printf("%s: bad directory: '..' isn't second\n", current_name);
1028 errors_uncorrected = 1;
1032 push_filename(name);
1035 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1036 printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
1039 if (inode && S_ISDIR(inode->i_mode))
1040 recursive_check2(ino);
1045 static void recursive_check(unsigned ino)
1047 struct minix1_inode *dir;
1051 if (!S_ISDIR(dir->i_mode))
1052 die("internal error");
1053 if (dir->i_size < 2 * dirsize) {
1054 printf("%s: bad directory: size<32", current_name);
1055 errors_uncorrected = 1;
1057 for (offset = 0; offset < dir->i_size; offset += dirsize)
1058 check_file(dir, offset);
1061 #if ENABLE_FEATURE_MINIX2
1062 static void recursive_check2(unsigned ino)
1064 struct minix2_inode *dir;
1068 if (!S_ISDIR(dir->i_mode))
1069 die("internal error");
1070 if (dir->i_size < 2 * dirsize) {
1071 printf("%s: bad directory: size<32", current_name);
1072 errors_uncorrected = 1;
1074 for (offset = 0; offset < dir->i_size; offset += dirsize)
1075 check_file2(dir, offset);
1079 static int bad_zone(int i)
1081 char buffer[BLOCK_SIZE];
1083 if (BLOCK_SIZE * i != lseek(IN, BLOCK_SIZE * i, SEEK_SET))
1084 die("seek failed in bad_zone");
1085 return (BLOCK_SIZE != read(IN, buffer, BLOCK_SIZE));
1088 static void check_counts(void)
1092 for (i = 1; i <= INODES; i++) {
1093 if (warn_mode && Inode1[i].i_mode && !inode_in_use(i)) {
1094 printf("Inode %d has non-zero mode. ", i);
1095 if (ask("Clear", 1)) {
1096 Inode1[i].i_mode = 0;
1100 if (!inode_count[i]) {
1101 if (!inode_in_use(i))
1103 printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
1104 if (ask("Clear", 1))
1108 if (!inode_in_use(i)) {
1109 printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
1113 if (Inode1[i].i_nlinks != inode_count[i]) {
1114 printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
1115 i, Inode1[i].i_mode, Inode1[i].i_nlinks,
1117 if (ask("Set i_nlinks to count", 1)) {
1118 Inode1[i].i_nlinks = inode_count[i];
1123 for (i = FIRSTZONE; i < ZONES; i++) {
1124 if ((zone_in_use(i) != 0) == zone_count[i])
1126 if (!zone_count[i]) {
1129 printf("Zone %d is marked 'in use', but no file uses it. ", i);
1130 if (ask("Unmark", 1))
1134 printf("Zone %d: %sin use, counted=%d\n",
1135 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1139 #if ENABLE_FEATURE_MINIX2
1140 static void check_counts2(void)
1144 for (i = 1; i <= INODES; i++) {
1145 if (warn_mode && Inode2[i].i_mode && !inode_in_use(i)) {
1146 printf("Inode %d has non-zero mode. ", i);
1147 if (ask("Clear", 1)) {
1148 Inode2[i].i_mode = 0;
1152 if (!inode_count[i]) {
1153 if (!inode_in_use(i))
1155 printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
1156 if (ask("Clear", 1))
1160 if (!inode_in_use(i)) {
1161 printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
1165 if (Inode2[i].i_nlinks != inode_count[i]) {
1166 printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
1167 i, Inode2[i].i_mode, Inode2[i].i_nlinks,
1169 if (ask("Set i_nlinks to count", 1)) {
1170 Inode2[i].i_nlinks = inode_count[i];
1175 for (i = FIRSTZONE; i < ZONES; i++) {
1176 if ((zone_in_use(i) != 0) == zone_count[i])
1178 if (!zone_count[i]) {
1181 printf("Zone %d is marked 'in use', but no file uses it. ", i);
1182 if (ask("Unmark", 1))
1186 printf("Zone %d: %sin use, counted=%d\n",
1187 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1192 static void check(void)
1194 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1195 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1196 check_zones(MINIX_ROOT_INO);
1197 recursive_check(MINIX_ROOT_INO);
1201 #if ENABLE_FEATURE_MINIX2
1202 static void check2(void)
1204 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1205 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1206 check_zones2(MINIX_ROOT_INO);
1207 recursive_check2(MINIX_ROOT_INO);
1214 int fsck_minix_main(int argc, char **argv);
1215 int fsck_minix_main(int argc, char **argv)
1220 xfunc_error_retval = 8;
1222 alloc_current_name();
1223 #if ENABLE_FEATURE_CLEAN_UP
1224 /* Don't bother to free memory. Exit does
1225 * that automagically, so we can save a few bytes */
1226 atexit(free_current_name);
1229 if (INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE)
1230 die("bad inode size");
1231 #if ENABLE_FEATURE_MINIX2
1232 if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
1233 die("bad v2 inode size");
1235 while (--argc != 0) {
1237 if (argv[0][0] != '-') {
1240 device_name = argv[0];
1242 while (*++argv[0]) {
1243 switch (argv[0][0]) {
1276 check_mount(); /* trying to check a mounted filesystem? */
1277 if (repair && !automatic) {
1278 if (!isatty(0) || !isatty(1))
1279 die("need terminal for interactive repairs");
1281 IN = xopen(device_name, repair ? O_RDWR : O_RDONLY);
1283 /*sync(); paranoia? */
1287 * Determine whether or not we should continue with the checking.
1288 * This is based on the status of the filesystem valid and error
1289 * flags and whether or not the -f switch was specified on the
1292 printf("%s, "PROGRAM_VERSION"\n", applet_name);
1294 if (!(Super.s_state & MINIX_ERROR_FS)
1295 && (Super.s_state & MINIX_VALID_FS) && !force
1298 printf("%s is clean, check is skipped\n", device_name);
1301 printf("Forcing filesystem check on %s\n", device_name);
1303 printf("Filesystem on %s is dirty, needs checking\n",
1308 if (repair && !automatic) {
1309 tcgetattr(0, &termios);
1311 tmp.c_lflag &= ~(ICANON | ECHO);
1312 tcsetattr(0, TCSANOW, &tmp);
1327 for (i = 1, free_cnt = 0; i <= INODES; i++)
1328 if (!inode_in_use(i))
1330 printf("\n%6u inodes used (%u%%)\n", (INODES - free_cnt),
1331 100 * (INODES - free_cnt) / INODES);
1332 for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++)
1333 if (!zone_in_use(i))
1335 printf("%6u zones used (%u%%)\n\n"
1336 "%6u regular files\n"
1338 "%6u character device files\n"
1339 "%6u block device files\n"
1341 "%6u symbolic links\n"
1344 (ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES,
1345 regular, directory, chardev, blockdev,
1346 links - 2 * directory + 1, symlinks,
1347 total - 2 * directory + 1);
1351 printf("FILE SYSTEM HAS BEEN CHANGED\n");
1354 write_super_block();
1356 if (repair && !automatic)
1357 tcsetattr(0, TCSANOW, &termios);
1361 if (errors_uncorrected)