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 :-).
89 //usage:#define fsck_minix_trivial_usage
90 //usage: "[-larvsmf] BLOCKDEV"
91 //usage:#define fsck_minix_full_usage "\n\n"
92 //usage: "Check MINIX filesystem\n"
93 //usage: "\n -l List all filenames"
94 //usage: "\n -r Perform interactive repairs"
95 //usage: "\n -a Perform automatic repairs"
96 //usage: "\n -v Verbose"
97 //usage: "\n -s Output superblock information"
98 //usage: "\n -m Show \"mode not cleared\" warnings"
99 //usage: "\n -f Force file system check"
106 #define BLKGETSIZE _IO(0x12,96) /* return device size */
109 struct BUG_bad_inode_size {
110 char BUG_bad_inode1_size[(INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
111 #if ENABLE_FEATURE_MINIX2
112 char BUG_bad_inode2_size[(INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
118 MINIX1_LINK_MAX = 250,
119 MINIX2_LINK_MAX = 65530,
120 MINIX_I_MAP_SLOTS = 8,
121 MINIX_Z_MAP_SLOTS = 64,
122 MINIX_V1 = 0x0001, /* original minix fs */
123 MINIX_V2 = 0x0002, /* minix V2 fs */
125 MINIX_NAME_MAX = 255, /* # chars in a file name */
129 #if !ENABLE_FEATURE_MINIX2
130 enum { version2 = 0 };
133 enum { MAX_DEPTH = 32 };
138 #if ENABLE_FEATURE_MINIX2
141 smallint changed; /* is filesystem modified? */
142 smallint errors_uncorrected; /* flag if some error was not corrected */
143 smallint termios_set;
146 const char *device_name;
147 int directory, regular, blockdev, chardev, links, symlinks, total;
153 unsigned char *inode_count;
154 unsigned char *zone_count;
158 char *name_component[MAX_DEPTH+1];
161 struct termios sv_termios;
162 char superblock_buffer[BLOCK_SIZE];
163 char add_zone_ind_blk[BLOCK_SIZE];
164 char add_zone_dind_blk[BLOCK_SIZE];
165 IF_FEATURE_MINIX2(char add_zone_tind_blk[BLOCK_SIZE];)
166 char check_file_blk[BLOCK_SIZE];
169 char current_name[MAX_DEPTH * MINIX_NAME_MAX];
171 #define G (*ptr_to_globals)
172 #if ENABLE_FEATURE_MINIX2
173 #define version2 (G.version2 )
175 #define changed (G.changed )
176 #define errors_uncorrected (G.errors_uncorrected )
177 #define termios_set (G.termios_set )
178 #define dirsize (G.dirsize )
179 #define namelen (G.namelen )
180 #define device_name (G.device_name )
181 #define directory (G.directory )
182 #define regular (G.regular )
183 #define blockdev (G.blockdev )
184 #define chardev (G.chardev )
185 #define links (G.links )
186 #define symlinks (G.symlinks )
187 #define total (G.total )
188 #define inode_buffer (G.inode_buffer )
189 #define inode_map (G.inode_map )
190 #define zone_map (G.zone_map )
191 #define inode_count (G.inode_count )
192 #define zone_count (G.zone_count )
193 #define name_depth (G.name_depth )
194 #define name_component (G.name_component )
195 #define sv_termios (G.sv_termios )
196 #define superblock_buffer (G.superblock_buffer )
197 #define add_zone_ind_blk (G.add_zone_ind_blk )
198 #define add_zone_dind_blk (G.add_zone_dind_blk )
199 #define add_zone_tind_blk (G.add_zone_tind_blk )
200 #define check_file_blk (G.check_file_blk )
201 #define current_name (G.current_name )
202 #define INIT_G() do { \
203 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
206 current_name[0] = '/'; \
207 /*current_name[1] = '\0';*/ \
208 name_component[0] = ¤t_name[0]; \
212 #define OPTION_STR "larvsmf"
222 #define OPT_list (option_mask32 & OPT_l)
223 #define OPT_automatic (option_mask32 & OPT_a)
224 #define OPT_repair (option_mask32 & OPT_r)
225 #define OPT_verbose (option_mask32 & OPT_v)
226 #define OPT_show (option_mask32 & OPT_s)
227 #define OPT_warn_mode (option_mask32 & OPT_w)
228 #define OPT_force (option_mask32 & OPT_f)
229 /* non-automatic repairs requested? */
230 #define OPT_manual ((option_mask32 & (OPT_a|OPT_r)) == OPT_r)
233 #define Inode1 (((struct minix1_inode *) inode_buffer)-1)
234 #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
236 #define Super (*(struct minix_superblock *)(superblock_buffer))
238 #if ENABLE_FEATURE_MINIX2
239 # define ZONES ((unsigned)(version2 ? Super.s_zones : Super.s_nzones))
241 # define ZONES ((unsigned)(Super.s_nzones))
243 #define INODES ((unsigned)Super.s_ninodes)
244 #define IMAPS ((unsigned)Super.s_imap_blocks)
245 #define ZMAPS ((unsigned)Super.s_zmap_blocks)
246 #define FIRSTZONE ((unsigned)Super.s_firstdatazone)
247 #define ZONESIZE ((unsigned)Super.s_log_zone_size)
248 #define MAXSIZE ((unsigned)Super.s_max_size)
249 #define MAGIC (Super.s_magic)
251 /* gcc likes this more (code is smaller) than macro variant */
252 static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
254 return (size + n-1) / n;
257 #if !ENABLE_FEATURE_MINIX2
258 #define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK)
260 #define INODE_BLOCKS div_roundup(INODES, \
261 (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK))
264 #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
265 #define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS)
267 /* Before you ask "where they come from?": */
268 /* setbit/clrbit are supplied by sys/param.h */
270 static int minix_bit(const char *a, unsigned i)
272 return (a[i >> 3] & (1<<(i & 7)));
275 static void minix_setbit(char *a, unsigned i)
280 static void minix_clrbit(char *a, unsigned i)
286 /* Note: do not assume 0/1, it is 0/nonzero */
287 #define zone_in_use(x) (minix_bit(zone_map,(x)-FIRSTZONE+1))
288 #define inode_in_use(x) (minix_bit(inode_map,(x)))
290 #define mark_inode(x) (minix_setbit(inode_map,(x)))
291 #define unmark_inode(x) (minix_clrbit(inode_map,(x)))
293 #define mark_zone(x) (minix_setbit(zone_map,(x)-FIRSTZONE+1))
294 #define unmark_zone(x) (minix_clrbit(zone_map,(x)-FIRSTZONE+1))
297 static void recursive_check(unsigned ino);
298 #if ENABLE_FEATURE_MINIX2
299 static void recursive_check2(unsigned ino);
302 static void die(const char *str) NORETURN;
303 static void die(const char *str)
306 tcsetattr_stdin_TCSANOW(&sv_termios);
307 bb_error_msg_and_die("%s", str);
310 static void push_filename(const char *name)
314 // [0] [1] [2] <-name_component[i]
315 if (name_depth < MAX_DEPTH) {
317 char *p = name_component[name_depth];
319 len = sprintf(p, "%.*s", namelen, name);
320 name_component[name_depth + 1] = p + len;
325 static void pop_filename(void)
328 if (name_depth < MAX_DEPTH) {
329 *name_component[name_depth] = '\0';
331 current_name[0] = '/';
332 current_name[1] = '\0';
337 static int ask(const char *string, int def)
343 errors_uncorrected = 1;
349 errors_uncorrected = 1;
352 printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
358 errors_uncorrected = 1;
363 c |= 0x20; /* tolower */
377 errors_uncorrected = 1;
383 * Make certain that we aren't checking a filesystem that is on a
384 * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
385 * 1994 Theodore Ts'o. Also licensed under GPL.
387 static void check_mount(void)
389 if (find_mount_point(device_name, 0)) {
391 #if ENABLE_FEATURE_MTAB_SUPPORT
393 * If the root is mounted read-only, then /etc/mtab is
394 * probably not correct; so we won't issue a warning based on
397 int fd = open(bb_path_mtab_file, O_RDWR);
399 if (fd < 0 && errno == EROFS)
403 printf("%s is mounted. ", device_name);
405 if (isatty(0) && isatty(1))
406 cont = ask("Do you really want to continue", 0);
408 printf("Check aborted\n");
415 * check_zone_nr checks to see that *nr is a valid zone nr. If it
416 * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
417 * if an error was corrected, and returns the zone (0 for no zone
418 * or a bad zone-number).
420 static int check_zone_nr2(uint32_t *nr, smallint *corrected)
427 else if (*nr >= ZONES)
431 printf("Zone nr %s in file '%s'. ", msg, current_name);
432 if (ask("Remove block", 1)) {
439 static int check_zone_nr(uint16_t *nr, smallint *corrected)
442 int r = check_zone_nr2(&nr32, corrected);
443 *nr = (uint16_t)nr32;
448 * read-block reads block nr into the buffer at addr.
450 static void read_block(unsigned nr, void *addr)
453 memset(addr, 0, BLOCK_SIZE);
456 xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
457 if (BLOCK_SIZE != full_read(dev_fd, addr, BLOCK_SIZE)) {
458 printf("%s: bad block %u in file '%s'\n",
459 bb_msg_read_error, nr, current_name);
460 errors_uncorrected = 1;
461 memset(addr, 0, BLOCK_SIZE);
466 * write_block writes block nr to disk.
468 static void write_block(unsigned nr, void *addr)
472 if (nr < FIRSTZONE || nr >= ZONES) {
473 printf("Internal error: trying to write bad block\n"
474 "Write request ignored\n");
475 errors_uncorrected = 1;
478 xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
479 if (BLOCK_SIZE != full_write(dev_fd, addr, BLOCK_SIZE)) {
480 printf("%s: bad block %u in file '%s'\n",
481 bb_msg_write_error, nr, current_name);
482 errors_uncorrected = 1;
487 * map_block calculates the absolute block nr of a block in a file.
488 * It sets 'changed' if the inode has needed changing, and re-writes
489 * any indirect blocks with errors.
491 static int map_block(struct minix1_inode *inode, unsigned blknr)
493 uint16_t ind[BLOCK_SIZE >> 1];
498 return check_zone_nr(inode->i_zone + blknr, &changed);
501 block = check_zone_nr(inode->i_zone + 7, &changed);
505 block = check_zone_nr(inode->i_zone + 8, &changed);
506 read_block(block, ind); /* double indirect */
508 result = check_zone_nr(&ind[blknr / 512], &blk_chg);
510 write_block(block, ind);
513 read_block(block, ind);
515 result = check_zone_nr(&ind[blknr % 512], &blk_chg);
517 write_block(block, ind);
521 #if ENABLE_FEATURE_MINIX2
522 static int map_block2(struct minix2_inode *inode, unsigned blknr)
524 uint32_t ind[BLOCK_SIZE >> 2];
529 return check_zone_nr2(inode->i_zone + blknr, &changed);
532 block = check_zone_nr2(inode->i_zone + 7, &changed);
536 if (blknr < 256 * 256) {
537 block = check_zone_nr2(inode->i_zone + 8, &changed);
541 block = check_zone_nr2(inode->i_zone + 9, &changed);
542 read_block(block, ind); /* triple indirect */
544 result = check_zone_nr2(&ind[blknr / (256 * 256)], &blk_chg);
546 write_block(block, ind);
549 read_block(block, ind); /* double indirect */
551 result = check_zone_nr2(&ind[(blknr / 256) % 256], &blk_chg);
553 write_block(block, ind);
556 read_block(block, ind);
558 result = check_zone_nr2(&ind[blknr % 256], &blk_chg);
560 write_block(block, ind);
565 static void write_superblock(void)
568 * Set the state of the filesystem based on whether or not there
569 * are uncorrected errors. The filesystem valid flag is
570 * unconditionally set if we get this far.
572 Super.s_state |= MINIX_VALID_FS | MINIX_ERROR_FS;
573 if (!errors_uncorrected)
574 Super.s_state &= ~MINIX_ERROR_FS;
576 xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
577 if (BLOCK_SIZE != full_write(dev_fd, superblock_buffer, BLOCK_SIZE))
578 die("can't write superblock");
581 static void write_tables(void)
585 if (IMAPS * BLOCK_SIZE != write(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
586 die("can't write inode map");
587 if (ZMAPS * BLOCK_SIZE != write(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
588 die("can't write zone map");
589 if (INODE_BUFFER_SIZE != write(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
590 die("can't write inodes");
593 static void get_dirsize(void)
596 char blk[BLOCK_SIZE];
599 #if ENABLE_FEATURE_MINIX2
601 block = Inode2[MINIX_ROOT_INO].i_zone[0];
604 block = Inode1[MINIX_ROOT_INO].i_zone[0];
605 read_block(block, blk);
606 for (size = 16; size < BLOCK_SIZE; size <<= 1) {
607 if (strcmp(blk + size + 2, "..") == 0) {
616 static void read_superblock(void)
618 xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
619 if (BLOCK_SIZE != full_read(dev_fd, superblock_buffer, BLOCK_SIZE))
620 die("can't read superblock");
621 /* already initialized to:
626 if (MAGIC == MINIX1_SUPER_MAGIC) {
627 } else if (MAGIC == MINIX1_SUPER_MAGIC2) {
630 #if ENABLE_FEATURE_MINIX2
631 } else if (MAGIC == MINIX2_SUPER_MAGIC) {
633 } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
639 die("bad magic number in superblock");
640 if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
641 die("only 1k blocks/zones supported");
642 if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
643 die("bad s_imap_blocks field in superblock");
644 if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
645 die("bad s_zmap_blocks field in superblock");
648 static void read_tables(void)
650 inode_map = xzalloc(IMAPS * BLOCK_SIZE);
651 zone_map = xzalloc(ZMAPS * BLOCK_SIZE);
652 inode_buffer = xmalloc(INODE_BUFFER_SIZE);
653 inode_count = xmalloc(INODES + 1);
654 zone_count = xmalloc(ZONES);
655 if (IMAPS * BLOCK_SIZE != read(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
656 die("can't read inode map");
657 if (ZMAPS * BLOCK_SIZE != read(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
658 die("can't read zone map");
659 if (INODE_BUFFER_SIZE != read(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
660 die("can't read inodes");
661 if (NORM_FIRSTZONE != FIRSTZONE) {
662 printf("warning: firstzone!=norm_firstzone\n");
663 errors_uncorrected = 1;
669 "Firstdatazone=%u (%u)\n"
672 "Filesystem state=%u\n"
676 FIRSTZONE, NORM_FIRSTZONE,
677 BLOCK_SIZE << ZONESIZE,
684 static void get_inode_common(unsigned nr, uint16_t i_mode)
687 if (!inode_count[nr]) {
688 if (!inode_in_use(nr)) {
689 printf("Inode %d is marked as 'unused', but it is used "
690 "for file '%s'\n", nr, current_name);
692 if (ask("Mark as 'in use'", 1))
695 errors_uncorrected = 1;
700 else if (S_ISREG(i_mode))
702 else if (S_ISCHR(i_mode))
704 else if (S_ISBLK(i_mode))
706 else if (S_ISLNK(i_mode))
708 else if (S_ISSOCK(i_mode));
709 else if (S_ISFIFO(i_mode));
711 printf("%s has mode %05o\n", current_name, i_mode);
715 if (!++inode_count[nr]) {
716 printf("Warning: inode count too big\n");
718 errors_uncorrected = 1;
722 static struct minix1_inode *get_inode(unsigned nr)
724 struct minix1_inode *inode;
726 if (!nr || nr > INODES)
729 get_inode_common(nr, inode->i_mode);
733 #if ENABLE_FEATURE_MINIX2
734 static struct minix2_inode *get_inode2(unsigned nr)
736 struct minix2_inode *inode;
738 if (!nr || nr > INODES)
741 get_inode_common(nr, inode->i_mode);
746 static void check_root(void)
748 struct minix1_inode *inode = Inode1 + MINIX_ROOT_INO;
750 if (!inode || !S_ISDIR(inode->i_mode))
751 die("root inode isn't a directory");
754 #if ENABLE_FEATURE_MINIX2
755 static void check_root2(void)
757 struct minix2_inode *inode = Inode2 + MINIX_ROOT_INO;
759 if (!inode || !S_ISDIR(inode->i_mode))
760 die("root inode isn't a directory");
763 void check_root2(void);
766 static int add_zone_common(int block, smallint *corrected)
770 if (zone_count[block]) {
771 printf("Already used block is reused in file '%s'. ",
773 if (ask("Clear", 1)) {
776 return -1; /* "please zero out *znr" */
779 if (!zone_in_use(block)) {
780 printf("Block %d in file '%s' is marked as 'unused'. ",
781 block, current_name);
782 if (ask("Correct", 1))
785 if (!++zone_count[block])
790 static int add_zone(uint16_t *znr, smallint *corrected)
794 block = check_zone_nr(znr, corrected);
795 block = add_zone_common(block, corrected);
803 #if ENABLE_FEATURE_MINIX2
804 static int add_zone2(uint32_t *znr, smallint *corrected)
808 block = check_zone_nr2(znr, corrected);
809 block = add_zone_common(block, corrected);
818 static void add_zone_ind(uint16_t *znr, smallint *corrected)
822 smallint chg_blk = 0;
824 block = add_zone(znr, corrected);
827 read_block(block, add_zone_ind_blk);
828 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
829 add_zone(i + (uint16_t *) add_zone_ind_blk, &chg_blk);
831 write_block(block, add_zone_ind_blk);
834 #if ENABLE_FEATURE_MINIX2
835 static void add_zone_ind2(uint32_t *znr, smallint *corrected)
839 smallint chg_blk = 0;
841 block = add_zone2(znr, corrected);
844 read_block(block, add_zone_ind_blk);
845 for (i = 0; i < BLOCK_SIZE >> 2; i++)
846 add_zone2(i + (uint32_t *) add_zone_ind_blk, &chg_blk);
848 write_block(block, add_zone_ind_blk);
852 static void add_zone_dind(uint16_t *znr, smallint *corrected)
856 smallint chg_blk = 0;
858 block = add_zone(znr, corrected);
861 read_block(block, add_zone_dind_blk);
862 for (i = 0; i < (BLOCK_SIZE >> 1); i++)
863 add_zone_ind(i + (uint16_t *) add_zone_dind_blk, &chg_blk);
865 write_block(block, add_zone_dind_blk);
868 #if ENABLE_FEATURE_MINIX2
869 static void add_zone_dind2(uint32_t *znr, smallint *corrected)
873 smallint chg_blk = 0;
875 block = add_zone2(znr, corrected);
878 read_block(block, add_zone_dind_blk);
879 for (i = 0; i < BLOCK_SIZE >> 2; i++)
880 add_zone_ind2(i + (uint32_t *) add_zone_dind_blk, &chg_blk);
882 write_block(block, add_zone_dind_blk);
885 static void add_zone_tind2(uint32_t *znr, smallint *corrected)
889 smallint chg_blk = 0;
891 block = add_zone2(znr, corrected);
894 read_block(block, add_zone_tind_blk);
895 for (i = 0; i < BLOCK_SIZE >> 2; i++)
896 add_zone_dind2(i + (uint32_t *) add_zone_tind_blk, &chg_blk);
898 write_block(block, add_zone_tind_blk);
902 static void check_zones(unsigned i)
904 struct minix1_inode *inode;
906 if (!i || i > INODES)
908 if (inode_count[i] > 1) /* have we counted this file already? */
911 if (!S_ISDIR(inode->i_mode)
912 && !S_ISREG(inode->i_mode)
913 && !S_ISLNK(inode->i_mode)
917 for (i = 0; i < 7; i++)
918 add_zone(i + inode->i_zone, &changed);
919 add_zone_ind(7 + inode->i_zone, &changed);
920 add_zone_dind(8 + inode->i_zone, &changed);
923 #if ENABLE_FEATURE_MINIX2
924 static void check_zones2(unsigned i)
926 struct minix2_inode *inode;
928 if (!i || i > INODES)
930 if (inode_count[i] > 1) /* have we counted this file already? */
933 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
934 && !S_ISLNK(inode->i_mode))
936 for (i = 0; i < 7; i++)
937 add_zone2(i + inode->i_zone, &changed);
938 add_zone_ind2(7 + inode->i_zone, &changed);
939 add_zone_dind2(8 + inode->i_zone, &changed);
940 add_zone_tind2(9 + inode->i_zone, &changed);
944 static void check_file(struct minix1_inode *dir, unsigned offset)
946 struct minix1_inode *inode;
951 block = map_block(dir, offset / BLOCK_SIZE);
952 read_block(block, check_file_blk);
953 name = check_file_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, check_file_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 struct minix2_inode *inode;
1001 block = map_block2(dir, offset / BLOCK_SIZE);
1002 read_block(block, check_file_blk);
1003 name = check_file_blk + (offset % BLOCK_SIZE) + 2;
1004 ino = *(uint16_t *) (name - 2);
1006 printf("%s contains a bad inode number for file '%.*s'. ",
1007 current_name, namelen, name);
1008 if (ask("Remove", 1)) {
1009 *(uint16_t *) (name - 2) = 0;
1010 write_block(block, check_file_blk);
1014 push_filename(name);
1015 inode = get_inode2(ino);
1018 if (inode && LONE_CHAR(name, '.'))
1020 printf("%s: bad directory: '.' isn't first\n", current_name);
1021 errors_uncorrected = 1;
1023 if (offset == dirsize) {
1024 if (inode && strcmp("..", name) == 0)
1026 printf("%s: bad directory: '..' isn't second\n", current_name);
1027 errors_uncorrected = 1;
1031 push_filename(name);
1034 printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
1035 printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
1038 if (inode && S_ISDIR(inode->i_mode))
1039 recursive_check2(ino);
1044 static void recursive_check(unsigned ino)
1046 struct minix1_inode *dir;
1050 if (!S_ISDIR(dir->i_mode))
1051 die("internal error");
1052 if (dir->i_size < 2 * dirsize) {
1053 printf("%s: bad directory: size<32", current_name);
1054 errors_uncorrected = 1;
1056 for (offset = 0; offset < dir->i_size; offset += dirsize)
1057 check_file(dir, offset);
1060 #if ENABLE_FEATURE_MINIX2
1061 static void recursive_check2(unsigned ino)
1063 struct minix2_inode *dir;
1067 if (!S_ISDIR(dir->i_mode))
1068 die("internal error");
1069 if (dir->i_size < 2 * dirsize) {
1070 printf("%s: bad directory: size<32", current_name);
1071 errors_uncorrected = 1;
1073 for (offset = 0; offset < dir->i_size; offset += dirsize)
1074 check_file2(dir, offset);
1078 static int bad_zone(int i)
1080 char buffer[BLOCK_SIZE];
1082 xlseek(dev_fd, BLOCK_SIZE * i, SEEK_SET);
1083 return (BLOCK_SIZE != full_read(dev_fd, buffer, BLOCK_SIZE));
1086 static void check_counts(void)
1090 for (i = 1; i <= INODES; i++) {
1091 if (OPT_warn_mode && Inode1[i].i_mode && !inode_in_use(i)) {
1092 printf("Inode %d has non-zero mode. ", i);
1093 if (ask("Clear", 1)) {
1094 Inode1[i].i_mode = 0;
1098 if (!inode_count[i]) {
1099 if (!inode_in_use(i))
1101 printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
1102 if (ask("Clear", 1))
1106 if (!inode_in_use(i)) {
1107 printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
1111 if (Inode1[i].i_nlinks != inode_count[i]) {
1112 printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
1113 i, Inode1[i].i_mode, Inode1[i].i_nlinks,
1115 if (ask("Set i_nlinks to count", 1)) {
1116 Inode1[i].i_nlinks = inode_count[i];
1121 for (i = FIRSTZONE; i < ZONES; i++) {
1122 if ((zone_in_use(i) != 0) == zone_count[i])
1124 if (!zone_count[i]) {
1127 printf("Zone %d is marked 'in use', but no file uses it. ", i);
1128 if (ask("Unmark", 1))
1132 printf("Zone %d: %sin use, counted=%d\n",
1133 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1137 #if ENABLE_FEATURE_MINIX2
1138 static void check_counts2(void)
1142 for (i = 1; i <= INODES; i++) {
1143 if (OPT_warn_mode && Inode2[i].i_mode && !inode_in_use(i)) {
1144 printf("Inode %d has non-zero mode. ", i);
1145 if (ask("Clear", 1)) {
1146 Inode2[i].i_mode = 0;
1150 if (!inode_count[i]) {
1151 if (!inode_in_use(i))
1153 printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
1154 if (ask("Clear", 1))
1158 if (!inode_in_use(i)) {
1159 printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
1163 if (Inode2[i].i_nlinks != inode_count[i]) {
1164 printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
1165 i, Inode2[i].i_mode, Inode2[i].i_nlinks,
1167 if (ask("Set i_nlinks to count", 1)) {
1168 Inode2[i].i_nlinks = inode_count[i];
1173 for (i = FIRSTZONE; i < ZONES; i++) {
1174 if ((zone_in_use(i) != 0) == zone_count[i])
1176 if (!zone_count[i]) {
1179 printf("Zone %d is marked 'in use', but no file uses it. ", i);
1180 if (ask("Unmark", 1))
1184 printf("Zone %d: %sin use, counted=%d\n",
1185 i, zone_in_use(i) ? "" : "not ", zone_count[i]);
1190 static void check(void)
1192 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1193 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1194 check_zones(MINIX_ROOT_INO);
1195 recursive_check(MINIX_ROOT_INO);
1199 #if ENABLE_FEATURE_MINIX2
1200 static void check2(void)
1202 memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
1203 memset(zone_count, 0, ZONES * sizeof(*zone_count));
1204 check_zones2(MINIX_ROOT_INO);
1205 recursive_check2(MINIX_ROOT_INO);
1212 int fsck_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1213 int fsck_minix_main(int argc UNUSED_PARAM, char **argv)
1218 xfunc_error_retval = 8;
1222 opt_complementary = "=1:ar"; /* one argument; -a assumes -r */
1223 getopt32(argv, OPTION_STR);
1225 device_name = argv[0];
1227 check_mount(); /* trying to check a mounted filesystem? */
1229 if (!isatty(0) || !isatty(1))
1230 die("need terminal for interactive repairs");
1232 xmove_fd(xopen(device_name, OPT_repair ? O_RDWR : O_RDONLY), dev_fd);
1234 /*sync(); paranoia? */
1238 * Determine whether or not we should continue with the checking.
1239 * This is based on the status of the filesystem valid and error
1240 * flags and whether or not the -f switch was specified on the
1243 printf("%s: %s\n", applet_name, bb_banner);
1245 if (!(Super.s_state & MINIX_ERROR_FS)
1246 && (Super.s_state & MINIX_VALID_FS) && !OPT_force
1249 printf("%s is clean, check is skipped\n", device_name);
1251 } else if (OPT_force)
1252 printf("Forcing filesystem check on %s\n", device_name);
1253 else if (OPT_repair)
1254 printf("Filesystem on %s is dirty, needs checking\n",
1260 tcgetattr(0, &sv_termios);
1262 tmp.c_lflag &= ~(ICANON | ECHO);
1263 tcsetattr_stdin_TCSANOW(&tmp);
1278 for (i = 1, free_cnt = 0; i <= INODES; i++)
1279 if (!inode_in_use(i))
1281 printf("\n%6u inodes used (%u%%)\n", (INODES - free_cnt),
1282 100 * (INODES - free_cnt) / INODES);
1283 for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++)
1284 if (!zone_in_use(i))
1286 printf("%6u zones used (%u%%)\n\n"
1287 "%6u regular files\n"
1289 "%6u character device files\n"
1290 "%6u block device files\n"
1292 "%6u symbolic links\n"
1295 (ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES,
1296 regular, directory, chardev, blockdev,
1297 links - 2 * directory + 1, symlinks,
1298 total - 2 * directory + 1);
1302 printf("FILE SYSTEM HAS BEEN CHANGED\n");
1304 } else if (OPT_repair)
1308 tcsetattr_stdin_TCSANOW(&sv_termios);
1312 if (errors_uncorrected)