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.
25 * 19.04.92 - Had to start over again from this old version, as a
26 * kernel bug ate my enhanced fsck in february.
28 * 28.02.93 - added support for different directory entry sizes..
30 * Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with
31 * superblock information
33 * Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform
34 * to that required by fsutil
36 * Mon Jan 3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu)
37 * Added support for file system valid flag. Also
38 * added program_version variable and output of
39 * program name and version number when program
42 * 30.10.94 - added support for v2 filesystem
43 * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
45 * 10.12.94 - added test to prevent checking of mounted fs adapted
46 * from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck
47 * program. (Daniel Quinlan, quinlan@yggdrasil.com)
49 * 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such
50 * for modern libcs (janl@math.uio.no, Nicolai Langfeldt)
52 * 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk
53 * (Russell King). He made them for ARM. It would seem
54 * that the ARM is powerful enough to do this in C whereas
55 * i386 and m64k must use assembly to get it fast >:-)
56 * This should make minix fsck system-independent.
57 * (janl@math.uio.no, Nicolai Langfeldt)
59 * 04.11.96 - Added minor fixes from Andreas Schwab to avoid compiler
60 * warnings. Added mc68k bitops from
61 * Joerg Dorchain <dorchain@mpi-sb.mpg.de>.
63 * 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by
66 * 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org>
67 * - added Native Language Support
70 * I've had no time to add comments - hopefully the function names
71 * are comments enough. As with all file system checkers, this assumes
72 * the file system is quiescent - don't use it on a mounted device
73 * unless you can be sure nobody is writing to it (and remember that the
74 * kernel can write to it when it searches for files).
76 * Usage: fsck [-larvsm] device
77 * -l for a listing of all the filenames
78 * -a for automatic repairs (not implemented)
79 * -r for repairs (interactive) (not implemented)
80 * -v for verbose (tells how many files)
81 * -s for superblock info
82 * -m for minix-like "mode not cleared" warnings
83 * -f force filesystem check even if filesystem marked as valid
85 * The device may be a block device or a image of one, but this isn't
86 * enforced (but it's not much fun on a character device :-).
88 //config:config FSCK_MINIX
89 //config: bool "fsck_minix"
92 //config: The minix filesystem is a nice, small, compact, read-write filesystem
93 //config: with little overhead. It is not a journaling filesystem however and
94 //config: can experience corruption if it is not properly unmounted or if the
95 //config: power goes off in the middle of a write. This utility allows you to
96 //config: check for and attempt to repair any corruption that occurs to a minix
99 //applet:IF_FSCK_MINIX(APPLET_ODDNAME(fsck.minix, fsck_minix, BB_DIR_SBIN, BB_SUID_DROP, fsck_minix))
101 //kbuild:lib-$(CONFIG_FSCK_MINIX) += fsck_minix.o
103 //usage:#define fsck_minix_trivial_usage
104 //usage: "[-larvsmf] BLOCKDEV"
105 //usage:#define fsck_minix_full_usage "\n\n"
106 //usage: "Check MINIX filesystem\n"
107 //usage: "\n -l List all filenames"
108 //usage: "\n -r Perform interactive repairs"
109 //usage: "\n -a Perform automatic repairs"
110 //usage: "\n -v Verbose"
111 //usage: "\n -s Output superblock information"
112 //usage: "\n -m Show \"mode not cleared\" warnings"
113 //usage: "\n -f Force file system check"
120 #define BLKGETSIZE _IO(0x12,96) /* return device size */
123 struct BUG_bad_inode_size {
124 char BUG_bad_inode1_size[(INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
125 #if ENABLE_FEATURE_MINIX2
126 char BUG_bad_inode2_size[(INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
132 MINIX1_LINK_MAX = 250,
133 MINIX2_LINK_MAX = 65530,
134 MINIX_I_MAP_SLOTS = 8,
135 MINIX_Z_MAP_SLOTS = 64,
136 MINIX_V1 = 0x0001, /* original minix fs */
137 MINIX_V2 = 0x0002, /* minix V2 fs */
139 MINIX_NAME_MAX = 255, /* # chars in a file name */
143 #if !ENABLE_FEATURE_MINIX2
144 enum { version2 = 0 };
147 enum { MAX_DEPTH = 32 };
152 #if ENABLE_FEATURE_MINIX2
155 smallint changed; /* is filesystem modified? */
156 smallint errors_uncorrected; /* flag if some error was not corrected */
157 smallint termios_set;
160 const char *device_name;
161 int directory, regular, blockdev, chardev, links, symlinks, total;
167 unsigned char *inode_count;
168 unsigned char *zone_count;
172 char *name_component[MAX_DEPTH+1];
175 struct termios sv_termios;
176 char superblock_buffer[BLOCK_SIZE];
177 char add_zone_ind_blk[BLOCK_SIZE];
178 char add_zone_dind_blk[BLOCK_SIZE];
179 IF_FEATURE_MINIX2(char add_zone_tind_blk[BLOCK_SIZE];)
180 char check_file_blk[BLOCK_SIZE];
183 char current_name[MAX_DEPTH * MINIX_NAME_MAX];
185 #define G (*ptr_to_globals)
186 #if ENABLE_FEATURE_MINIX2
187 #define version2 (G.version2 )
189 #define changed (G.changed )
190 #define errors_uncorrected (G.errors_uncorrected )
191 #define termios_set (G.termios_set )
192 #define dirsize (G.dirsize )
193 #define namelen (G.namelen )
194 #define device_name (G.device_name )
195 #define directory (G.directory )
196 #define regular (G.regular )
197 #define blockdev (G.blockdev )
198 #define chardev (G.chardev )
199 #define links (G.links )
200 #define symlinks (G.symlinks )
201 #define total (G.total )
202 #define inode_buffer (G.inode_buffer )
203 #define inode_map (G.inode_map )
204 #define zone_map (G.zone_map )
205 #define inode_count (G.inode_count )
206 #define zone_count (G.zone_count )
207 #define name_depth (G.name_depth )
208 #define name_component (G.name_component )
209 #define sv_termios (G.sv_termios )
210 #define superblock_buffer (G.superblock_buffer )
211 #define add_zone_ind_blk (G.add_zone_ind_blk )
212 #define add_zone_dind_blk (G.add_zone_dind_blk )
213 #define add_zone_tind_blk (G.add_zone_tind_blk )
214 #define check_file_blk (G.check_file_blk )
215 #define current_name (G.current_name )
216 #define INIT_G() do { \
217 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
220 current_name[0] = '/'; \
221 /*current_name[1] = '\0';*/ \
222 name_component[0] = ¤t_name[0]; \
226 #define OPTION_STR "larvsmf"
236 #define OPT_list (option_mask32 & OPT_l)
237 #define OPT_automatic (option_mask32 & OPT_a)
238 #define OPT_repair (option_mask32 & OPT_r)
239 #define OPT_verbose (option_mask32 & OPT_v)
240 #define OPT_show (option_mask32 & OPT_s)
241 #define OPT_warn_mode (option_mask32 & OPT_w)
242 #define OPT_force (option_mask32 & OPT_f)
243 /* non-automatic repairs requested? */
244 #define OPT_manual ((option_mask32 & (OPT_a|OPT_r)) == OPT_r)
247 #define Inode1 (((struct minix1_inode *) inode_buffer)-1)
248 #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
250 #define Super (*(struct minix_superblock *)(superblock_buffer))
252 #if ENABLE_FEATURE_MINIX2
253 # define ZONES ((unsigned)(version2 ? Super.s_zones : Super.s_nzones))
255 # define ZONES ((unsigned)(Super.s_nzones))
257 #define INODES ((unsigned)Super.s_ninodes)
258 #define IMAPS ((unsigned)Super.s_imap_blocks)
259 #define ZMAPS ((unsigned)Super.s_zmap_blocks)
260 #define FIRSTZONE ((unsigned)Super.s_firstdatazone)
261 #define ZONESIZE ((unsigned)Super.s_log_zone_size)
262 #define MAXSIZE ((unsigned)Super.s_max_size)
263 #define MAGIC (Super.s_magic)
265 /* gcc likes this more (code is smaller) than macro variant */
266 static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
268 return (size + n-1) / n;
271 #if !ENABLE_FEATURE_MINIX2
272 #define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK)
274 #define INODE_BLOCKS div_roundup(INODES, \
275 (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK))
278 #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
279 #define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS)
281 /* Before you ask "where they come from?": */
282 /* setbit/clrbit are supplied by sys/param.h */
284 static int minix_bit(const char *a, unsigned i)
286 return (a[i >> 3] & (1<<(i & 7)));
289 static void minix_setbit(char *a, unsigned i)
294 static void minix_clrbit(char *a, unsigned i)
300 /* Note: do not assume 0/1, it is 0/nonzero */
301 #define zone_in_use(x) (minix_bit(zone_map,(x)-FIRSTZONE+1))
302 #define inode_in_use(x) (minix_bit(inode_map,(x)))
304 #define mark_inode(x) (minix_setbit(inode_map,(x)))
305 #define unmark_inode(x) (minix_clrbit(inode_map,(x)))
307 #define mark_zone(x) (minix_setbit(zone_map,(x)-FIRSTZONE+1))
308 #define unmark_zone(x) (minix_clrbit(zone_map,(x)-FIRSTZONE+1))
311 static void recursive_check(unsigned ino);
312 #if ENABLE_FEATURE_MINIX2
313 static void recursive_check2(unsigned ino);
316 static void die(const char *str) NORETURN;
317 static void die(const char *str)
320 tcsetattr_stdin_TCSANOW(&sv_termios);
321 bb_error_msg_and_die("%s", str);
324 static void push_filename(const char *name)
328 // [0] [1] [2] <-name_component[i]
329 if (name_depth < MAX_DEPTH) {
331 char *p = name_component[name_depth];
333 len = sprintf(p, "%.*s", namelen, name);
334 name_component[name_depth + 1] = p + len;
339 static void pop_filename(void)
342 if (name_depth < MAX_DEPTH) {
343 *name_component[name_depth] = '\0';
345 current_name[0] = '/';
346 current_name[1] = '\0';
351 static int ask(const char *string, int def)
357 errors_uncorrected = 1;
363 errors_uncorrected = 1;
366 printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
372 errors_uncorrected = 1;
377 c |= 0x20; /* tolower */
391 errors_uncorrected = 1;
397 * Make certain that we aren't checking a filesystem that is on a
398 * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
399 * 1994 Theodore Ts'o. Also licensed under GPL.
401 static void check_mount(void)
403 if (find_mount_point(device_name, 0)) {
405 #if ENABLE_FEATURE_MTAB_SUPPORT
407 * If the root is mounted read-only, then /etc/mtab is
408 * probably not correct; so we won't issue a warning based on
411 int fd = open(bb_path_mtab_file, O_RDWR);
413 if (fd < 0 && errno == EROFS)
417 printf("%s is mounted. ", device_name);
419 if (isatty(0) && isatty(1))
420 cont = ask("Do you really want to continue", 0);
422 puts("Check aborted");
429 * check_zone_nr checks to see that *nr is a valid zone nr. If it
430 * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
431 * if an error was corrected, and returns the zone (0 for no zone
432 * or a bad zone-number).
434 static int check_zone_nr2(uint32_t *nr, smallint *corrected)
441 else if (*nr >= ZONES)
445 printf("Zone nr %s in file '%s'. ", msg, current_name);
446 if (ask("Remove block", 1)) {
453 static int check_zone_nr(uint16_t *nr, smallint *corrected)
456 int r = check_zone_nr2(&nr32, corrected);
457 *nr = (uint16_t)nr32;
462 * read-block reads block nr into the buffer at addr.
464 static void read_block(unsigned nr, void *addr)
467 memset(addr, 0, BLOCK_SIZE);
470 xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
471 if (BLOCK_SIZE != full_read(dev_fd, addr, BLOCK_SIZE)) {
472 printf("%s: bad block %u in file '%s'\n",
473 bb_msg_read_error, nr, current_name);
474 errors_uncorrected = 1;
475 memset(addr, 0, BLOCK_SIZE);
480 * write_block writes block nr to disk.
482 static void write_block(unsigned nr, void *addr)
486 if (nr < FIRSTZONE || nr >= ZONES) {
487 puts("Internal error: trying to write bad block\n"
488 "Write request ignored");
489 errors_uncorrected = 1;
492 xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
493 if (BLOCK_SIZE != full_write(dev_fd, addr, BLOCK_SIZE)) {
494 printf("%s: bad block %u in file '%s'\n",
495 bb_msg_write_error, nr, current_name);
496 errors_uncorrected = 1;
501 * map_block calculates the absolute block nr of a block in a file.
502 * It sets 'changed' if the inode has needed changing, and re-writes
503 * any indirect blocks with errors.
505 static int map_block(struct minix1_inode *inode, unsigned blknr)
507 uint16_t ind[BLOCK_SIZE >> 1];
512 return check_zone_nr(inode->i_zone + blknr, &changed);
515 block = check_zone_nr(inode->i_zone + 7, &changed);
519 block = check_zone_nr(inode->i_zone + 8, &changed);
520 read_block(block, ind); /* double indirect */
522 result = check_zone_nr(&ind[blknr / 512], &blk_chg);
524 write_block(block, ind);
527 read_block(block, ind);
529 result = check_zone_nr(&ind[blknr % 512], &blk_chg);
531 write_block(block, ind);
535 #if ENABLE_FEATURE_MINIX2
536 static int map_block2(struct minix2_inode *inode, unsigned blknr)
538 uint32_t ind[BLOCK_SIZE >> 2];
543 return check_zone_nr2(inode->i_zone + blknr, &changed);
546 block = check_zone_nr2(inode->i_zone + 7, &changed);
550 if (blknr < 256 * 256) {
551 block = check_zone_nr2(inode->i_zone + 8, &changed);
555 block = check_zone_nr2(inode->i_zone + 9, &changed);
556 read_block(block, ind); /* triple indirect */
558 result = check_zone_nr2(&ind[blknr / (256 * 256)], &blk_chg);
560 write_block(block, ind);
563 read_block(block, ind); /* double indirect */
565 result = check_zone_nr2(&ind[(blknr / 256) % 256], &blk_chg);
567 write_block(block, ind);
570 read_block(block, ind);
572 result = check_zone_nr2(&ind[blknr % 256], &blk_chg);
574 write_block(block, ind);
579 static void write_superblock(void)
582 * Set the state of the filesystem based on whether or not there
583 * are uncorrected errors. The filesystem valid flag is
584 * unconditionally set if we get this far.
586 Super.s_state |= MINIX_VALID_FS | MINIX_ERROR_FS;
587 if (!errors_uncorrected)
588 Super.s_state &= ~MINIX_ERROR_FS;
590 xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
591 if (BLOCK_SIZE != full_write(dev_fd, superblock_buffer, BLOCK_SIZE))
592 die("can't write superblock");
595 static void write_tables(void)
599 if (IMAPS * BLOCK_SIZE != write(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
600 die("can't write inode map");
601 if (ZMAPS * BLOCK_SIZE != write(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
602 die("can't write zone map");
603 if (INODE_BUFFER_SIZE != write(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
604 die("can't write inodes");
607 static void get_dirsize(void)
610 char blk[BLOCK_SIZE];
613 #if ENABLE_FEATURE_MINIX2
615 block = Inode2[MINIX_ROOT_INO].i_zone[0];
618 block = Inode1[MINIX_ROOT_INO].i_zone[0];
619 read_block(block, blk);
620 for (size = 16; size < BLOCK_SIZE; size <<= 1) {
621 if (strcmp(blk + size + 2, "..") == 0) {
630 static void read_superblock(void)
632 xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
633 if (BLOCK_SIZE != full_read(dev_fd, superblock_buffer, BLOCK_SIZE))
634 die("can't read superblock");
635 /* already initialized to:
640 if (MAGIC == MINIX1_SUPER_MAGIC) {
641 } else if (MAGIC == MINIX1_SUPER_MAGIC2) {
644 #if ENABLE_FEATURE_MINIX2
645 } else if (MAGIC == MINIX2_SUPER_MAGIC) {
647 } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
653 die("bad magic number in superblock");
654 if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
655 die("only 1k blocks/zones supported");
656 if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
657 die("bad s_imap_blocks field in superblock");
658 if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
659 die("bad s_zmap_blocks field in superblock");
662 static void read_tables(void)
664 inode_map = xzalloc(IMAPS * BLOCK_SIZE);
665 zone_map = xzalloc(ZMAPS * BLOCK_SIZE);
666 inode_buffer = xmalloc(INODE_BUFFER_SIZE);
667 inode_count = xmalloc(INODES + 1);
668 zone_count = xmalloc(ZONES);
669 if (IMAPS * BLOCK_SIZE != read(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
670 die("can't read inode map");
671 if (ZMAPS * BLOCK_SIZE != read(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
672 die("can't read zone map");
673 if (INODE_BUFFER_SIZE != read(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
674 die("can't read inodes");
675 if (NORM_FIRSTZONE != FIRSTZONE) {
676 puts("warning: firstzone!=norm_firstzone");
677 errors_uncorrected = 1;
683 "Firstdatazone=%u (%u)\n"
686 "Filesystem state=%u\n"
690 FIRSTZONE, NORM_FIRSTZONE,
691 BLOCK_SIZE << ZONESIZE,
698 static void get_inode_common(unsigned nr, uint16_t i_mode)
701 if (!inode_count[nr]) {
702 if (!inode_in_use(nr)) {
703 printf("Inode %u is marked as 'unused', but it is used "
704 "for file '%s'\n", nr, current_name);
706 if (ask("Mark as 'in use'", 1))
709 errors_uncorrected = 1;
714 else if (S_ISREG(i_mode))
716 else if (S_ISCHR(i_mode))
718 else if (S_ISBLK(i_mode))
720 else if (S_ISLNK(i_mode))
722 else if (S_ISSOCK(i_mode));
723 else if (S_ISFIFO(i_mode));
725 printf("%s has mode %05o\n", current_name, i_mode);
729 if (!++inode_count[nr]) {
730 puts("Warning: inode count too big");
732 errors_uncorrected = 1;
736 static struct minix1_inode *get_inode(unsigned nr)
738 struct minix1_inode *inode;
740 if (!nr || nr > INODES)
743 get_inode_common(nr, inode->i_mode);
747 #if ENABLE_FEATURE_MINIX2
748 static struct minix2_inode *get_inode2(unsigned nr)
750 struct minix2_inode *inode;
752 if (!nr || nr > INODES)
755 get_inode_common(nr, inode->i_mode);
760 static void check_root(void)
762 struct minix1_inode *inode = Inode1 + MINIX_ROOT_INO;
764 if (!inode || !S_ISDIR(inode->i_mode))
765 die("root inode isn't a directory");
768 #if ENABLE_FEATURE_MINIX2
769 static void check_root2(void)
771 struct minix2_inode *inode = Inode2 + MINIX_ROOT_INO;
773 if (!inode || !S_ISDIR(inode->i_mode))
774 die("root inode isn't a directory");
777 void check_root2(void);
780 static int add_zone_common(int block, smallint *corrected)
784 if (zone_count[block]) {
785 printf("Already used block is reused in file '%s'. ",
787 if (ask("Clear", 1)) {
790 return -1; /* "please zero out *znr" */
793 if (!zone_in_use(block)) {
794 printf("Block %d in file '%s' is marked as 'unused'. ",
795 block, current_name);
796 if (ask("Correct", 1))
799 if (!++zone_count[block])
804 static int add_zone(uint16_t *znr, smallint *corrected)
808 block = check_zone_nr(znr, corrected);
809 block = add_zone_common(block, corrected);
817 #if ENABLE_FEATURE_MINIX2
818 static int add_zone2(uint32_t *znr, smallint *corrected)
822 block = check_zone_nr2(znr, corrected);
823 block = add_zone_common(block, corrected);
832 static void add_zone_ind(uint16_t *znr, smallint *corrected)
836 smallint chg_blk = 0;
838 block = add_zone(znr, corrected);
841 read_block(block, add_zone_ind_blk);
842 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
843 add_zone(i + (uint16_t *) add_zone_ind_blk, &chg_blk);
845 write_block(block, add_zone_ind_blk);
848 #if ENABLE_FEATURE_MINIX2
849 static void add_zone_ind2(uint32_t *znr, smallint *corrected)
853 smallint chg_blk = 0;
855 block = add_zone2(znr, corrected);
858 read_block(block, add_zone_ind_blk);
859 for (i = 0; i < BLOCK_SIZE >> 2; i++)
860 add_zone2(i + (uint32_t *) add_zone_ind_blk, &chg_blk);
862 write_block(block, add_zone_ind_blk);
866 static void add_zone_dind(uint16_t *znr, smallint *corrected)
870 smallint chg_blk = 0;
872 block = add_zone(znr, corrected);
875 read_block(block, add_zone_dind_blk);
876 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
877 add_zone_ind(i + (uint16_t *) add_zone_dind_blk, &chg_blk);
879 write_block(block, add_zone_dind_blk);
882 #if ENABLE_FEATURE_MINIX2
883 static void add_zone_dind2(uint32_t *znr, smallint *corrected)
887 smallint chg_blk = 0;
889 block = add_zone2(znr, corrected);
892 read_block(block, add_zone_dind_blk);
893 for (i = 0; i < BLOCK_SIZE >> 2; i++)
894 add_zone_ind2(i + (uint32_t *) add_zone_dind_blk, &chg_blk);
896 write_block(block, add_zone_dind_blk);
899 static void add_zone_tind2(uint32_t *znr, smallint *corrected)
903 smallint chg_blk = 0;
905 block = add_zone2(znr, corrected);
908 read_block(block, add_zone_tind_blk);
909 for (i = 0; i < BLOCK_SIZE >> 2; i++)
910 add_zone_dind2(i + (uint32_t *) add_zone_tind_blk, &chg_blk);
912 write_block(block, add_zone_tind_blk);
916 static void check_zones(unsigned i)
918 struct minix1_inode *inode;
920 if (!i || i > INODES)
922 if (inode_count[i] > 1) /* have we counted this file already? */
925 if (!S_ISDIR(inode->i_mode)
926 && !S_ISREG(inode->i_mode)
927 && !S_ISLNK(inode->i_mode)
931 for (i = 0; i < 7; i++)
932 add_zone(i + inode->i_zone, &changed);
933 add_zone_ind(7 + inode->i_zone, &changed);
934 add_zone_dind(8 + inode->i_zone, &changed);
937 #if ENABLE_FEATURE_MINIX2
938 static void check_zones2(unsigned i)
940 struct minix2_inode *inode;
942 if (!i || i > INODES)
944 if (inode_count[i] > 1) /* have we counted this file already? */
947 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
948 && !S_ISLNK(inode->i_mode))
950 for (i = 0; i < 7; i++)
951 add_zone2(i + inode->i_zone, &changed);
952 add_zone_ind2(7 + inode->i_zone, &changed);
953 add_zone_dind2(8 + inode->i_zone, &changed);
954 add_zone_tind2(9 + inode->i_zone, &changed);
958 static void check_file(struct minix1_inode *dir, unsigned offset)
960 struct minix1_inode *inode;
965 block = map_block(dir, offset / BLOCK_SIZE);
966 read_block(block, check_file_blk);
967 name = check_file_blk + (offset % BLOCK_SIZE) + 2;
968 ino = *(uint16_t *) (name - 2);
970 printf("%s contains a bad inode number for file '%.*s'. ",
971 current_name, namelen, name);
972 if (ask("Remove", 1)) {
973 *(uint16_t *) (name - 2) = 0;
974 write_block(block, check_file_blk);
979 inode = get_inode(ino);
982 if (inode && LONE_CHAR(name, '.'))
984 printf("%s: bad directory: '.' isn't first\n", current_name);
985 errors_uncorrected = 1;
987 if (offset == dirsize) {
988 if (inode && strcmp("..", name) == 0)
990 printf("%s: bad directory: '..' isn't second\n", current_name);
991 errors_uncorrected = 1;
998 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
999 printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
1002 if (inode && S_ISDIR(inode->i_mode))
1003 recursive_check(ino);
1007 #if ENABLE_FEATURE_MINIX2
1008 static void check_file2(struct minix2_inode *dir, unsigned offset)
1010 struct minix2_inode *inode;
1015 block = map_block2(dir, offset / BLOCK_SIZE);
1016 read_block(block, check_file_blk);
1017 name = check_file_blk + (offset % BLOCK_SIZE) + 2;
1018 ino = *(uint16_t *) (name - 2);
1020 printf("%s contains a bad inode number for file '%.*s'. ",
1021 current_name, namelen, name);
1022 if (ask("Remove", 1)) {
1023 *(uint16_t *) (name - 2) = 0;
1024 write_block(block, check_file_blk);
1028 push_filename(name);
1029 inode = get_inode2(ino);
1032 if (inode && LONE_CHAR(name, '.'))
1034 printf("%s: bad directory: '.' isn't first\n", current_name);
1035 errors_uncorrected = 1;
1037 if (offset == dirsize) {
1038 if (inode && strcmp("..", name) == 0)
1040 printf("%s: bad directory: '..' isn't second\n", current_name);
1041 errors_uncorrected = 1;
1045 push_filename(name);
1048 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1049 printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
1052 if (inode && S_ISDIR(inode->i_mode))
1053 recursive_check2(ino);
1058 static void recursive_check(unsigned ino)
1060 struct minix1_inode *dir;
1064 if (!S_ISDIR(dir->i_mode))
1065 die("internal error");
1066 if (dir->i_size < 2 * dirsize) {
1067 printf("%s: bad directory: size<32", current_name);
1068 errors_uncorrected = 1;
1070 for (offset = 0; offset < dir->i_size; offset += dirsize)
1071 check_file(dir, offset);
1074 #if ENABLE_FEATURE_MINIX2
1075 static void recursive_check2(unsigned ino)
1077 struct minix2_inode *dir;
1081 if (!S_ISDIR(dir->i_mode))
1082 die("internal error");
1083 if (dir->i_size < 2 * dirsize) {
1084 printf("%s: bad directory: size<32", current_name);
1085 errors_uncorrected = 1;
1087 for (offset = 0; offset < dir->i_size; offset += dirsize)
1088 check_file2(dir, offset);
1092 static int bad_zone(int i)
1094 char buffer[BLOCK_SIZE];
1096 xlseek(dev_fd, BLOCK_SIZE * i, SEEK_SET);
1097 return (BLOCK_SIZE != full_read(dev_fd, buffer, BLOCK_SIZE));
1100 static void check_counts(void)
1104 for (i = 1; i <= INODES; i++) {
1105 if (OPT_warn_mode && Inode1[i].i_mode && !inode_in_use(i)) {
1106 printf("Inode %d has non-zero mode. ", i);
1107 if (ask("Clear", 1)) {
1108 Inode1[i].i_mode = 0;
1112 if (!inode_count[i]) {
1113 if (!inode_in_use(i))
1115 printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
1116 if (ask("Clear", 1))
1120 if (!inode_in_use(i)) {
1121 printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
1125 if (Inode1[i].i_nlinks != inode_count[i]) {
1126 printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
1127 i, Inode1[i].i_mode, Inode1[i].i_nlinks,
1129 if (ask("Set i_nlinks to count", 1)) {
1130 Inode1[i].i_nlinks = inode_count[i];
1135 for (i = FIRSTZONE; i < ZONES; i++) {
1136 if ((zone_in_use(i) != 0) == zone_count[i])
1138 if (!zone_count[i]) {
1141 printf("Zone %d is marked 'in use', but no file uses it. ", i);
1142 if (ask("Unmark", 1))
1146 printf("Zone %d: %sin use, counted=%d\n",
1147 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1151 #if ENABLE_FEATURE_MINIX2
1152 static void check_counts2(void)
1156 for (i = 1; i <= INODES; i++) {
1157 if (OPT_warn_mode && Inode2[i].i_mode && !inode_in_use(i)) {
1158 printf("Inode %d has non-zero mode. ", i);
1159 if (ask("Clear", 1)) {
1160 Inode2[i].i_mode = 0;
1164 if (!inode_count[i]) {
1165 if (!inode_in_use(i))
1167 printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
1168 if (ask("Clear", 1))
1172 if (!inode_in_use(i)) {
1173 printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
1177 if (Inode2[i].i_nlinks != inode_count[i]) {
1178 printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
1179 i, Inode2[i].i_mode, Inode2[i].i_nlinks,
1181 if (ask("Set i_nlinks to count", 1)) {
1182 Inode2[i].i_nlinks = inode_count[i];
1187 for (i = FIRSTZONE; i < ZONES; i++) {
1188 if ((zone_in_use(i) != 0) == zone_count[i])
1190 if (!zone_count[i]) {
1193 printf("Zone %d is marked 'in use', but no file uses it. ", i);
1194 if (ask("Unmark", 1))
1198 printf("Zone %d: %sin use, counted=%d\n",
1199 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1204 static void check(void)
1206 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1207 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1208 check_zones(MINIX_ROOT_INO);
1209 recursive_check(MINIX_ROOT_INO);
1213 #if ENABLE_FEATURE_MINIX2
1214 static void check2(void)
1216 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1217 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1218 check_zones2(MINIX_ROOT_INO);
1219 recursive_check2(MINIX_ROOT_INO);
1226 int fsck_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1227 int fsck_minix_main(int argc UNUSED_PARAM, char **argv)
1231 xfunc_error_retval = 8;
1235 opt_complementary = "=1:ar"; /* one argument; -a assumes -r */
1236 getopt32(argv, OPTION_STR);
1238 device_name = argv[0];
1240 check_mount(); /* trying to check a mounted filesystem? */
1242 if (!isatty(0) || !isatty(1))
1243 die("need terminal for interactive repairs");
1245 xmove_fd(xopen(device_name, OPT_repair ? O_RDWR : O_RDONLY), dev_fd);
1247 /*sync(); paranoia? */
1251 * Determine whether or not we should continue with the checking.
1252 * This is based on the status of the filesystem valid and error
1253 * flags and whether or not the -f switch was specified on the
1256 printf("%s: %s\n", applet_name, bb_banner);
1258 if (!(Super.s_state & MINIX_ERROR_FS)
1259 && (Super.s_state & MINIX_VALID_FS) && !OPT_force
1262 printf("%s is clean, check is skipped\n", device_name);
1264 } else if (OPT_force)
1265 printf("Forcing filesystem check on %s\n", device_name);
1266 else if (OPT_repair)
1267 printf("Filesystem on %s is dirty, needs checking\n",
1273 set_termios_to_raw(STDIN_FILENO, &sv_termios, 0);
1288 for (i = 1, free_cnt = 0; i <= INODES; i++)
1289 if (!inode_in_use(i))
1291 printf("\n%6u inodes used (%u%%)\n", (INODES - free_cnt),
1292 100 * (INODES - free_cnt) / INODES);
1293 for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++)
1294 if (!zone_in_use(i))
1296 printf("%6u zones used (%u%%)\n\n"
1297 "%6u regular files\n"
1299 "%6u character device files\n"
1300 "%6u block device files\n"
1302 "%6u symbolic links\n"
1305 (ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES,
1306 regular, directory, chardev, blockdev,
1307 links - 2 * directory + 1, symlinks,
1308 total - 2 * directory + 1);
1312 puts("FILE SYSTEM HAS BEEN CHANGED");
1314 } else if (OPT_repair)
1318 tcsetattr_stdin_TCSANOW(&sv_termios);
1322 if (errors_uncorrected)