| /* vi: set sw=4 ts=4: */ |
| /* |
| * fsck.c - a file system consistency checker for Linux. |
| * |
| * (C) 1991, 1992 Linus Torvalds. |
| * |
| * Licensed under GPLv2, see file LICENSE in this source tree. |
| */ |
| |
| /* |
| * 09.11.91 - made the first rudimentary functions |
| * |
| * 10.11.91 - updated, does checking, no repairs yet. |
| * Sent out to the mailing-list for testing. |
| * |
| * 14.11.91 - Testing seems to have gone well. Added some |
| * correction-code, and changed some functions. |
| * |
| * 15.11.91 - More correction code. Hopefully it notices most |
| * cases now, and tries to do something about them. |
| * |
| * 16.11.91 - More corrections (thanks to Mika Jalava). Most |
| * things seem to work now. Yeah, sure. |
| * |
| * 19.04.92 - Had to start over again from this old version, as a |
| * kernel bug ate my enhanced fsck in february. |
| * |
| * 28.02.93 - added support for different directory entry sizes.. |
| * |
| * Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with |
| * superblock information |
| * |
| * Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform |
| * to that required by fsutil |
| * |
| * Mon Jan 3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu) |
| * Added support for file system valid flag. Also |
| * added program_version variable and output of |
| * program name and version number when program |
| * is executed. |
| * |
| * 30.10.94 - added support for v2 filesystem |
| * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de) |
| * |
| * 10.12.94 - added test to prevent checking of mounted fs adapted |
| * from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck |
| * program. (Daniel Quinlan, quinlan@yggdrasil.com) |
| * |
| * 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such |
| * for modern libcs (janl@math.uio.no, Nicolai Langfeldt) |
| * |
| * 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk |
| * (Russell King). He made them for ARM. It would seem |
| * that the ARM is powerful enough to do this in C whereas |
| * i386 and m64k must use assembly to get it fast >:-) |
| * This should make minix fsck system-independent. |
| * (janl@math.uio.no, Nicolai Langfeldt) |
| * |
| * 04.11.96 - Added minor fixes from Andreas Schwab to avoid compiler |
| * warnings. Added mc68k bitops from |
| * Joerg Dorchain <dorchain@mpi-sb.mpg.de>. |
| * |
| * 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by |
| * Andreas Schwab. |
| * |
| * 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org> |
| * - added Native Language Support |
| * |
| * |
| * I've had no time to add comments - hopefully the function names |
| * are comments enough. As with all file system checkers, this assumes |
| * the file system is quiescent - don't use it on a mounted device |
| * unless you can be sure nobody is writing to it (and remember that the |
| * kernel can write to it when it searches for files). |
| * |
| * Usage: fsck [-larvsm] device |
| * -l for a listing of all the filenames |
| * -a for automatic repairs (not implemented) |
| * -r for repairs (interactive) (not implemented) |
| * -v for verbose (tells how many files) |
| * -s for superblock info |
| * -m for minix-like "mode not cleared" warnings |
| * -f force filesystem check even if filesystem marked as valid |
| * |
| * The device may be a block device or a image of one, but this isn't |
| * enforced (but it's not much fun on a character device :-). |
| */ |
| |
| //usage:#define fsck_minix_trivial_usage |
| //usage: "[-larvsmf] BLOCKDEV" |
| //usage:#define fsck_minix_full_usage "\n\n" |
| //usage: "Check MINIX filesystem\n" |
| //usage: "\n -l List all filenames" |
| //usage: "\n -r Perform interactive repairs" |
| //usage: "\n -a Perform automatic repairs" |
| //usage: "\n -v Verbose" |
| //usage: "\n -s Output superblock information" |
| //usage: "\n -m Show \"mode not cleared\" warnings" |
| //usage: "\n -f Force file system check" |
| |
| #include <mntent.h> |
| #include "libbb.h" |
| #include "minix.h" |
| |
| #ifndef BLKGETSIZE |
| #define BLKGETSIZE _IO(0x12,96) /* return device size */ |
| #endif |
| |
| struct BUG_bad_inode_size { |
| char BUG_bad_inode1_size[(INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1]; |
| #if ENABLE_FEATURE_MINIX2 |
| char BUG_bad_inode2_size[(INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1]; |
| #endif |
| }; |
| |
| enum { |
| #ifdef UNUSED |
| MINIX1_LINK_MAX = 250, |
| MINIX2_LINK_MAX = 65530, |
| MINIX_I_MAP_SLOTS = 8, |
| MINIX_Z_MAP_SLOTS = 64, |
| MINIX_V1 = 0x0001, /* original minix fs */ |
| MINIX_V2 = 0x0002, /* minix V2 fs */ |
| #endif |
| MINIX_NAME_MAX = 255, /* # chars in a file name */ |
| }; |
| |
| |
| #if !ENABLE_FEATURE_MINIX2 |
| enum { version2 = 0 }; |
| #endif |
| |
| enum { MAX_DEPTH = 32 }; |
| |
| enum { dev_fd = 3 }; |
| |
| struct globals { |
| #if ENABLE_FEATURE_MINIX2 |
| smallint version2; |
| #endif |
| smallint changed; /* is filesystem modified? */ |
| smallint errors_uncorrected; /* flag if some error was not corrected */ |
| smallint termios_set; |
| smallint dirsize; |
| smallint namelen; |
| const char *device_name; |
| int directory, regular, blockdev, chardev, links, symlinks, total; |
| char *inode_buffer; |
| |
| char *inode_map; |
| char *zone_map; |
| |
| unsigned char *inode_count; |
| unsigned char *zone_count; |
| |
| /* File-name data */ |
| int name_depth; |
| char *name_component[MAX_DEPTH+1]; |
| |
| /* Bigger stuff */ |
| struct termios sv_termios; |
| char superblock_buffer[BLOCK_SIZE]; |
| char add_zone_ind_blk[BLOCK_SIZE]; |
| char add_zone_dind_blk[BLOCK_SIZE]; |
| IF_FEATURE_MINIX2(char add_zone_tind_blk[BLOCK_SIZE];) |
| char check_file_blk[BLOCK_SIZE]; |
| |
| /* File-name data */ |
| char current_name[MAX_DEPTH * MINIX_NAME_MAX]; |
| }; |
| #define G (*ptr_to_globals) |
| #if ENABLE_FEATURE_MINIX2 |
| #define version2 (G.version2 ) |
| #endif |
| #define changed (G.changed ) |
| #define errors_uncorrected (G.errors_uncorrected ) |
| #define termios_set (G.termios_set ) |
| #define dirsize (G.dirsize ) |
| #define namelen (G.namelen ) |
| #define device_name (G.device_name ) |
| #define directory (G.directory ) |
| #define regular (G.regular ) |
| #define blockdev (G.blockdev ) |
| #define chardev (G.chardev ) |
| #define links (G.links ) |
| #define symlinks (G.symlinks ) |
| #define total (G.total ) |
| #define inode_buffer (G.inode_buffer ) |
| #define inode_map (G.inode_map ) |
| #define zone_map (G.zone_map ) |
| #define inode_count (G.inode_count ) |
| #define zone_count (G.zone_count ) |
| #define name_depth (G.name_depth ) |
| #define name_component (G.name_component ) |
| #define sv_termios (G.sv_termios ) |
| #define superblock_buffer (G.superblock_buffer ) |
| #define add_zone_ind_blk (G.add_zone_ind_blk ) |
| #define add_zone_dind_blk (G.add_zone_dind_blk ) |
| #define add_zone_tind_blk (G.add_zone_tind_blk ) |
| #define check_file_blk (G.check_file_blk ) |
| #define current_name (G.current_name ) |
| #define INIT_G() do { \ |
| SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ |
| dirsize = 16; \ |
| namelen = 14; \ |
| current_name[0] = '/'; \ |
| /*current_name[1] = '\0';*/ \ |
| name_component[0] = ¤t_name[0]; \ |
| } while (0) |
| |
| |
| #define OPTION_STR "larvsmf" |
| enum { |
| OPT_l = (1 << 0), |
| OPT_a = (1 << 1), |
| OPT_r = (1 << 2), |
| OPT_v = (1 << 3), |
| OPT_s = (1 << 4), |
| OPT_w = (1 << 5), |
| OPT_f = (1 << 6), |
| }; |
| #define OPT_list (option_mask32 & OPT_l) |
| #define OPT_automatic (option_mask32 & OPT_a) |
| #define OPT_repair (option_mask32 & OPT_r) |
| #define OPT_verbose (option_mask32 & OPT_v) |
| #define OPT_show (option_mask32 & OPT_s) |
| #define OPT_warn_mode (option_mask32 & OPT_w) |
| #define OPT_force (option_mask32 & OPT_f) |
| /* non-automatic repairs requested? */ |
| #define OPT_manual ((option_mask32 & (OPT_a|OPT_r)) == OPT_r) |
| |
| |
| #define Inode1 (((struct minix1_inode *) inode_buffer)-1) |
| #define Inode2 (((struct minix2_inode *) inode_buffer)-1) |
| |
| #define Super (*(struct minix_superblock *)(superblock_buffer)) |
| |
| #if ENABLE_FEATURE_MINIX2 |
| # define ZONES ((unsigned)(version2 ? Super.s_zones : Super.s_nzones)) |
| #else |
| # define ZONES ((unsigned)(Super.s_nzones)) |
| #endif |
| #define INODES ((unsigned)Super.s_ninodes) |
| #define IMAPS ((unsigned)Super.s_imap_blocks) |
| #define ZMAPS ((unsigned)Super.s_zmap_blocks) |
| #define FIRSTZONE ((unsigned)Super.s_firstdatazone) |
| #define ZONESIZE ((unsigned)Super.s_log_zone_size) |
| #define MAXSIZE ((unsigned)Super.s_max_size) |
| #define MAGIC (Super.s_magic) |
| |
| /* gcc likes this more (code is smaller) than macro variant */ |
| static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n) |
| { |
| return (size + n-1) / n; |
| } |
| |
| #if !ENABLE_FEATURE_MINIX2 |
| #define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK) |
| #else |
| #define INODE_BLOCKS div_roundup(INODES, \ |
| (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK)) |
| #endif |
| |
| #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE) |
| #define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS) |
| |
| /* Before you ask "where they come from?": */ |
| /* setbit/clrbit are supplied by sys/param.h */ |
| |
| static int minix_bit(const char *a, unsigned i) |
| { |
| return (a[i >> 3] & (1<<(i & 7))); |
| } |
| |
| static void minix_setbit(char *a, unsigned i) |
| { |
| setbit(a, i); |
| changed = 1; |
| } |
| static void minix_clrbit(char *a, unsigned i) |
| { |
| clrbit(a, i); |
| changed = 1; |
| } |
| |
| /* Note: do not assume 0/1, it is 0/nonzero */ |
| #define zone_in_use(x) (minix_bit(zone_map,(x)-FIRSTZONE+1)) |
| #define inode_in_use(x) (minix_bit(inode_map,(x))) |
| |
| #define mark_inode(x) (minix_setbit(inode_map,(x))) |
| #define unmark_inode(x) (minix_clrbit(inode_map,(x))) |
| |
| #define mark_zone(x) (minix_setbit(zone_map,(x)-FIRSTZONE+1)) |
| #define unmark_zone(x) (minix_clrbit(zone_map,(x)-FIRSTZONE+1)) |
| |
| |
| static void recursive_check(unsigned ino); |
| #if ENABLE_FEATURE_MINIX2 |
| static void recursive_check2(unsigned ino); |
| #endif |
| |
| static void die(const char *str) NORETURN; |
| static void die(const char *str) |
| { |
| if (termios_set) |
| tcsetattr_stdin_TCSANOW(&sv_termios); |
| bb_error_msg_and_die("%s", str); |
| } |
| |
| static void push_filename(const char *name) |
| { |
| // /dir/dir/dir/file |
| // ^ ^ ^ |
| // [0] [1] [2] <-name_component[i] |
| if (name_depth < MAX_DEPTH) { |
| int len; |
| char *p = name_component[name_depth]; |
| *p++ = '/'; |
| len = sprintf(p, "%.*s", namelen, name); |
| name_component[name_depth + 1] = p + len; |
| } |
| name_depth++; |
| } |
| |
| static void pop_filename(void) |
| { |
| name_depth--; |
| if (name_depth < MAX_DEPTH) { |
| *name_component[name_depth] = '\0'; |
| if (!name_depth) { |
| current_name[0] = '/'; |
| current_name[1] = '\0'; |
| } |
| } |
| } |
| |
| static int ask(const char *string, int def) |
| { |
| int c; |
| |
| if (!OPT_repair) { |
| bb_putchar('\n'); |
| errors_uncorrected = 1; |
| return 0; |
| } |
| if (OPT_automatic) { |
| bb_putchar('\n'); |
| if (!def) |
| errors_uncorrected = 1; |
| return def; |
| } |
| printf(def ? "%s (y/n)? " : "%s (n/y)? ", string); |
| for (;;) { |
| fflush_all(); |
| c = getchar(); |
| if (c == EOF) { |
| if (!def) |
| errors_uncorrected = 1; |
| return def; |
| } |
| if (c == '\n') |
| break; |
| c |= 0x20; /* tolower */ |
| if (c == 'y') { |
| def = 1; |
| break; |
| } |
| if (c == 'n') { |
| def = 0; |
| break; |
| } |
| } |
| if (def) |
| printf("y\n"); |
| else { |
| printf("n\n"); |
| errors_uncorrected = 1; |
| } |
| return def; |
| } |
| |
| /* |
| * Make certain that we aren't checking a filesystem that is on a |
| * mounted partition. Code adapted from e2fsck, Copyright (C) 1993, |
| * 1994 Theodore Ts'o. Also licensed under GPL. |
| */ |
| static void check_mount(void) |
| { |
| if (find_mount_point(device_name, 0)) { |
| int cont; |
| #if ENABLE_FEATURE_MTAB_SUPPORT |
| /* |
| * If the root is mounted read-only, then /etc/mtab is |
| * probably not correct; so we won't issue a warning based on |
| * it. |
| */ |
| int fd = open(bb_path_mtab_file, O_RDWR); |
| |
| if (fd < 0 && errno == EROFS) |
| return; |
| close(fd); |
| #endif |
| printf("%s is mounted. ", device_name); |
| cont = 0; |
| if (isatty(0) && isatty(1)) |
| cont = ask("Do you really want to continue", 0); |
| if (!cont) { |
| printf("Check aborted\n"); |
| exit(EXIT_SUCCESS); |
| } |
| } |
| } |
| |
| /* |
| * check_zone_nr checks to see that *nr is a valid zone nr. If it |
| * isn't, it will possibly be repaired. Check_zone_nr sets *corrected |
| * if an error was corrected, and returns the zone (0 for no zone |
| * or a bad zone-number). |
| */ |
| static int check_zone_nr2(uint32_t *nr, smallint *corrected) |
| { |
| const char *msg; |
| if (!*nr) |
| return 0; |
| if (*nr < FIRSTZONE) |
| msg = "< FIRSTZONE"; |
| else if (*nr >= ZONES) |
| msg = ">= ZONES"; |
| else |
| return *nr; |
| printf("Zone nr %s in file '%s'. ", msg, current_name); |
| if (ask("Remove block", 1)) { |
| *nr = 0; |
| *corrected = 1; |
| } |
| return 0; |
| } |
| |
| static int check_zone_nr(uint16_t *nr, smallint *corrected) |
| { |
| uint32_t nr32 = *nr; |
| int r = check_zone_nr2(&nr32, corrected); |
| *nr = (uint16_t)nr32; |
| return r; |
| } |
| |
| /* |
| * read-block reads block nr into the buffer at addr. |
| */ |
| static void read_block(unsigned nr, void *addr) |
| { |
| if (!nr) { |
| memset(addr, 0, BLOCK_SIZE); |
| return; |
| } |
| xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET); |
| if (BLOCK_SIZE != full_read(dev_fd, addr, BLOCK_SIZE)) { |
| printf("%s: bad block %u in file '%s'\n", |
| bb_msg_read_error, nr, current_name); |
| errors_uncorrected = 1; |
| memset(addr, 0, BLOCK_SIZE); |
| } |
| } |
| |
| /* |
| * write_block writes block nr to disk. |
| */ |
| static void write_block(unsigned nr, void *addr) |
| { |
| if (!nr) |
| return; |
| if (nr < FIRSTZONE || nr >= ZONES) { |
| printf("Internal error: trying to write bad block\n" |
| "Write request ignored\n"); |
| errors_uncorrected = 1; |
| return; |
| } |
| xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET); |
| if (BLOCK_SIZE != full_write(dev_fd, addr, BLOCK_SIZE)) { |
| printf("%s: bad block %u in file '%s'\n", |
| bb_msg_write_error, nr, current_name); |
| errors_uncorrected = 1; |
| } |
| } |
| |
| /* |
| * map_block calculates the absolute block nr of a block in a file. |
| * It sets 'changed' if the inode has needed changing, and re-writes |
| * any indirect blocks with errors. |
| */ |
| static int map_block(struct minix1_inode *inode, unsigned blknr) |
| { |
| uint16_t ind[BLOCK_SIZE >> 1]; |
| int block, result; |
| smallint blk_chg; |
| |
| if (blknr < 7) |
| return check_zone_nr(inode->i_zone + blknr, &changed); |
| blknr -= 7; |
| if (blknr < 512) { |
| block = check_zone_nr(inode->i_zone + 7, &changed); |
| goto common; |
| } |
| blknr -= 512; |
| block = check_zone_nr(inode->i_zone + 8, &changed); |
| read_block(block, ind); /* double indirect */ |
| blk_chg = 0; |
| result = check_zone_nr(&ind[blknr / 512], &blk_chg); |
| if (blk_chg) |
| write_block(block, ind); |
| block = result; |
| common: |
| read_block(block, ind); |
| blk_chg = 0; |
| result = check_zone_nr(&ind[blknr % 512], &blk_chg); |
| if (blk_chg) |
| write_block(block, ind); |
| return result; |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static int map_block2(struct minix2_inode *inode, unsigned blknr) |
| { |
| uint32_t ind[BLOCK_SIZE >> 2]; |
| int block, result; |
| smallint blk_chg; |
| |
| if (blknr < 7) |
| return check_zone_nr2(inode->i_zone + blknr, &changed); |
| blknr -= 7; |
| if (blknr < 256) { |
| block = check_zone_nr2(inode->i_zone + 7, &changed); |
| goto common2; |
| } |
| blknr -= 256; |
| if (blknr < 256 * 256) { |
| block = check_zone_nr2(inode->i_zone + 8, &changed); |
| goto common1; |
| } |
| blknr -= 256 * 256; |
| block = check_zone_nr2(inode->i_zone + 9, &changed); |
| read_block(block, ind); /* triple indirect */ |
| blk_chg = 0; |
| result = check_zone_nr2(&ind[blknr / (256 * 256)], &blk_chg); |
| if (blk_chg) |
| write_block(block, ind); |
| block = result; |
| common1: |
| read_block(block, ind); /* double indirect */ |
| blk_chg = 0; |
| result = check_zone_nr2(&ind[(blknr / 256) % 256], &blk_chg); |
| if (blk_chg) |
| write_block(block, ind); |
| block = result; |
| common2: |
| read_block(block, ind); |
| blk_chg = 0; |
| result = check_zone_nr2(&ind[blknr % 256], &blk_chg); |
| if (blk_chg) |
| write_block(block, ind); |
| return result; |
| } |
| #endif |
| |
| static void write_superblock(void) |
| { |
| /* |
| * Set the state of the filesystem based on whether or not there |
| * are uncorrected errors. The filesystem valid flag is |
| * unconditionally set if we get this far. |
| */ |
| Super.s_state |= MINIX_VALID_FS | MINIX_ERROR_FS; |
| if (!errors_uncorrected) |
| Super.s_state &= ~MINIX_ERROR_FS; |
| |
| xlseek(dev_fd, BLOCK_SIZE, SEEK_SET); |
| if (BLOCK_SIZE != full_write(dev_fd, superblock_buffer, BLOCK_SIZE)) |
| die("can't write superblock"); |
| } |
| |
| static void write_tables(void) |
| { |
| write_superblock(); |
| |
| if (IMAPS * BLOCK_SIZE != write(dev_fd, inode_map, IMAPS * BLOCK_SIZE)) |
| die("can't write inode map"); |
| if (ZMAPS * BLOCK_SIZE != write(dev_fd, zone_map, ZMAPS * BLOCK_SIZE)) |
| die("can't write zone map"); |
| if (INODE_BUFFER_SIZE != write(dev_fd, inode_buffer, INODE_BUFFER_SIZE)) |
| die("can't write inodes"); |
| } |
| |
| static void get_dirsize(void) |
| { |
| int block; |
| char blk[BLOCK_SIZE]; |
| int size; |
| |
| #if ENABLE_FEATURE_MINIX2 |
| if (version2) |
| block = Inode2[MINIX_ROOT_INO].i_zone[0]; |
| else |
| #endif |
| block = Inode1[MINIX_ROOT_INO].i_zone[0]; |
| read_block(block, blk); |
| for (size = 16; size < BLOCK_SIZE; size <<= 1) { |
| if (strcmp(blk + size + 2, "..") == 0) { |
| dirsize = size; |
| namelen = size - 2; |
| return; |
| } |
| } |
| /* use defaults */ |
| } |
| |
| static void read_superblock(void) |
| { |
| xlseek(dev_fd, BLOCK_SIZE, SEEK_SET); |
| if (BLOCK_SIZE != full_read(dev_fd, superblock_buffer, BLOCK_SIZE)) |
| die("can't read superblock"); |
| /* already initialized to: |
| namelen = 14; |
| dirsize = 16; |
| version2 = 0; |
| */ |
| if (MAGIC == MINIX1_SUPER_MAGIC) { |
| } else if (MAGIC == MINIX1_SUPER_MAGIC2) { |
| namelen = 30; |
| dirsize = 32; |
| #if ENABLE_FEATURE_MINIX2 |
| } else if (MAGIC == MINIX2_SUPER_MAGIC) { |
| version2 = 1; |
| } else if (MAGIC == MINIX2_SUPER_MAGIC2) { |
| namelen = 30; |
| dirsize = 32; |
| version2 = 1; |
| #endif |
| } else |
| die("bad magic number in superblock"); |
| if (ZONESIZE != 0 || BLOCK_SIZE != 1024) |
| die("only 1k blocks/zones supported"); |
| if (IMAPS * BLOCK_SIZE * 8 < INODES + 1) |
| die("bad s_imap_blocks field in superblock"); |
| if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1) |
| die("bad s_zmap_blocks field in superblock"); |
| } |
| |
| static void read_tables(void) |
| { |
| inode_map = xzalloc(IMAPS * BLOCK_SIZE); |
| zone_map = xzalloc(ZMAPS * BLOCK_SIZE); |
| inode_buffer = xmalloc(INODE_BUFFER_SIZE); |
| inode_count = xmalloc(INODES + 1); |
| zone_count = xmalloc(ZONES); |
| if (IMAPS * BLOCK_SIZE != read(dev_fd, inode_map, IMAPS * BLOCK_SIZE)) |
| die("can't read inode map"); |
| if (ZMAPS * BLOCK_SIZE != read(dev_fd, zone_map, ZMAPS * BLOCK_SIZE)) |
| die("can't read zone map"); |
| if (INODE_BUFFER_SIZE != read(dev_fd, inode_buffer, INODE_BUFFER_SIZE)) |
| die("can't read inodes"); |
| if (NORM_FIRSTZONE != FIRSTZONE) { |
| printf("warning: firstzone!=norm_firstzone\n"); |
| errors_uncorrected = 1; |
| } |
| get_dirsize(); |
| if (OPT_show) { |
| printf("%u inodes\n" |
| "%u blocks\n" |
| "Firstdatazone=%u (%u)\n" |
| "Zonesize=%u\n" |
| "Maxsize=%u\n" |
| "Filesystem state=%u\n" |
| "namelen=%u\n\n", |
| INODES, |
| ZONES, |
| FIRSTZONE, NORM_FIRSTZONE, |
| BLOCK_SIZE << ZONESIZE, |
| MAXSIZE, |
| Super.s_state, |
| namelen); |
| } |
| } |
| |
| static void get_inode_common(unsigned nr, uint16_t i_mode) |
| { |
| total++; |
| if (!inode_count[nr]) { |
| if (!inode_in_use(nr)) { |
| printf("Inode %d is marked as 'unused', but it is used " |
| "for file '%s'\n", nr, current_name); |
| if (OPT_repair) { |
| if (ask("Mark as 'in use'", 1)) |
| mark_inode(nr); |
| else |
| errors_uncorrected = 1; |
| } |
| } |
| if (S_ISDIR(i_mode)) |
| directory++; |
| else if (S_ISREG(i_mode)) |
| regular++; |
| else if (S_ISCHR(i_mode)) |
| chardev++; |
| else if (S_ISBLK(i_mode)) |
| blockdev++; |
| else if (S_ISLNK(i_mode)) |
| symlinks++; |
| else if (S_ISSOCK(i_mode)); |
| else if (S_ISFIFO(i_mode)); |
| else { |
| printf("%s has mode %05o\n", current_name, i_mode); |
| } |
| } else |
| links++; |
| if (!++inode_count[nr]) { |
| printf("Warning: inode count too big\n"); |
| inode_count[nr]--; |
| errors_uncorrected = 1; |
| } |
| } |
| |
| static struct minix1_inode *get_inode(unsigned nr) |
| { |
| struct minix1_inode *inode; |
| |
| if (!nr || nr > INODES) |
| return NULL; |
| inode = Inode1 + nr; |
| get_inode_common(nr, inode->i_mode); |
| return inode; |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static struct minix2_inode *get_inode2(unsigned nr) |
| { |
| struct minix2_inode *inode; |
| |
| if (!nr || nr > INODES) |
| return NULL; |
| inode = Inode2 + nr; |
| get_inode_common(nr, inode->i_mode); |
| return inode; |
| } |
| #endif |
| |
| static void check_root(void) |
| { |
| struct minix1_inode *inode = Inode1 + MINIX_ROOT_INO; |
| |
| if (!inode || !S_ISDIR(inode->i_mode)) |
| die("root inode isn't a directory"); |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static void check_root2(void) |
| { |
| struct minix2_inode *inode = Inode2 + MINIX_ROOT_INO; |
| |
| if (!inode || !S_ISDIR(inode->i_mode)) |
| die("root inode isn't a directory"); |
| } |
| #else |
| void check_root2(void); |
| #endif |
| |
| static int add_zone_common(int block, smallint *corrected) |
| { |
| if (!block) |
| return 0; |
| if (zone_count[block]) { |
| printf("Already used block is reused in file '%s'. ", |
| current_name); |
| if (ask("Clear", 1)) { |
| block = 0; |
| *corrected = 1; |
| return -1; /* "please zero out *znr" */ |
| } |
| } |
| if (!zone_in_use(block)) { |
| printf("Block %d in file '%s' is marked as 'unused'. ", |
| block, current_name); |
| if (ask("Correct", 1)) |
| mark_zone(block); |
| } |
| if (!++zone_count[block]) |
| zone_count[block]--; |
| return block; |
| } |
| |
| static int add_zone(uint16_t *znr, smallint *corrected) |
| { |
| int block; |
| |
| block = check_zone_nr(znr, corrected); |
| block = add_zone_common(block, corrected); |
| if (block == -1) { |
| *znr = 0; |
| block = 0; |
| } |
| return block; |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static int add_zone2(uint32_t *znr, smallint *corrected) |
| { |
| int block; |
| |
| block = check_zone_nr2(znr, corrected); |
| block = add_zone_common(block, corrected); |
| if (block == -1) { |
| *znr = 0; |
| block = 0; |
| } |
| return block; |
| } |
| #endif |
| |
| static void add_zone_ind(uint16_t *znr, smallint *corrected) |
| { |
| int i; |
| int block; |
| smallint chg_blk = 0; |
| |
| block = add_zone(znr, corrected); |
| if (!block) |
| return; |
| read_block(block, add_zone_ind_blk); |
| for (i = 0; i < (BLOCK_SIZE >> 1); i++) |
| add_zone(i + (uint16_t *) add_zone_ind_blk, &chg_blk); |
| if (chg_blk) |
| write_block(block, add_zone_ind_blk); |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static void add_zone_ind2(uint32_t *znr, smallint *corrected) |
| { |
| int i; |
| int block; |
| smallint chg_blk = 0; |
| |
| block = add_zone2(znr, corrected); |
| if (!block) |
| return; |
| read_block(block, add_zone_ind_blk); |
| for (i = 0; i < BLOCK_SIZE >> 2; i++) |
| add_zone2(i + (uint32_t *) add_zone_ind_blk, &chg_blk); |
| if (chg_blk) |
| write_block(block, add_zone_ind_blk); |
| } |
| #endif |
| |
| static void add_zone_dind(uint16_t *znr, smallint *corrected) |
| { |
| int i; |
| int block; |
| smallint chg_blk = 0; |
| |
| block = add_zone(znr, corrected); |
| if (!block) |
| return; |
| read_block(block, add_zone_dind_blk); |
| for (i = 0; i < (BLOCK_SIZE >> 1); i++) |
| add_zone_ind(i + (uint16_t *) add_zone_dind_blk, &chg_blk); |
| if (chg_blk) |
| write_block(block, add_zone_dind_blk); |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static void add_zone_dind2(uint32_t *znr, smallint *corrected) |
| { |
| int i; |
| int block; |
| smallint chg_blk = 0; |
| |
| block = add_zone2(znr, corrected); |
| if (!block) |
| return; |
| read_block(block, add_zone_dind_blk); |
| for (i = 0; i < BLOCK_SIZE >> 2; i++) |
| add_zone_ind2(i + (uint32_t *) add_zone_dind_blk, &chg_blk); |
| if (chg_blk) |
| write_block(block, add_zone_dind_blk); |
| } |
| |
| static void add_zone_tind2(uint32_t *znr, smallint *corrected) |
| { |
| int i; |
| int block; |
| smallint chg_blk = 0; |
| |
| block = add_zone2(znr, corrected); |
| if (!block) |
| return; |
| read_block(block, add_zone_tind_blk); |
| for (i = 0; i < BLOCK_SIZE >> 2; i++) |
| add_zone_dind2(i + (uint32_t *) add_zone_tind_blk, &chg_blk); |
| if (chg_blk) |
| write_block(block, add_zone_tind_blk); |
| } |
| #endif |
| |
| static void check_zones(unsigned i) |
| { |
| struct minix1_inode *inode; |
| |
| if (!i || i > INODES) |
| return; |
| if (inode_count[i] > 1) /* have we counted this file already? */ |
| return; |
| inode = Inode1 + i; |
| if (!S_ISDIR(inode->i_mode) |
| && !S_ISREG(inode->i_mode) |
| && !S_ISLNK(inode->i_mode) |
| ) { |
| return; |
| } |
| for (i = 0; i < 7; i++) |
| add_zone(i + inode->i_zone, &changed); |
| add_zone_ind(7 + inode->i_zone, &changed); |
| add_zone_dind(8 + inode->i_zone, &changed); |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static void check_zones2(unsigned i) |
| { |
| struct minix2_inode *inode; |
| |
| if (!i || i > INODES) |
| return; |
| if (inode_count[i] > 1) /* have we counted this file already? */ |
| return; |
| inode = Inode2 + i; |
| if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) |
| && !S_ISLNK(inode->i_mode)) |
| return; |
| for (i = 0; i < 7; i++) |
| add_zone2(i + inode->i_zone, &changed); |
| add_zone_ind2(7 + inode->i_zone, &changed); |
| add_zone_dind2(8 + inode->i_zone, &changed); |
| add_zone_tind2(9 + inode->i_zone, &changed); |
| } |
| #endif |
| |
| static void check_file(struct minix1_inode *dir, unsigned offset) |
| { |
| struct minix1_inode *inode; |
| int ino; |
| char *name; |
| int block; |
| |
| block = map_block(dir, offset / BLOCK_SIZE); |
| read_block(block, check_file_blk); |
| name = check_file_blk + (offset % BLOCK_SIZE) + 2; |
| ino = *(uint16_t *) (name - 2); |
| if (ino > INODES) { |
| printf("%s contains a bad inode number for file '%.*s'. ", |
| current_name, namelen, name); |
| if (ask("Remove", 1)) { |
| *(uint16_t *) (name - 2) = 0; |
| write_block(block, check_file_blk); |
| } |
| ino = 0; |
| } |
| push_filename(name); |
| inode = get_inode(ino); |
| pop_filename(); |
| if (!offset) { |
| if (inode && LONE_CHAR(name, '.')) |
| return; |
| printf("%s: bad directory: '.' isn't first\n", current_name); |
| errors_uncorrected = 1; |
| } |
| if (offset == dirsize) { |
| if (inode && strcmp("..", name) == 0) |
| return; |
| printf("%s: bad directory: '..' isn't second\n", current_name); |
| errors_uncorrected = 1; |
| } |
| if (!inode) |
| return; |
| push_filename(name); |
| if (OPT_list) { |
| if (OPT_verbose) |
| printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks); |
| printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : ""); |
| } |
| check_zones(ino); |
| if (inode && S_ISDIR(inode->i_mode)) |
| recursive_check(ino); |
| pop_filename(); |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static void check_file2(struct minix2_inode *dir, unsigned offset) |
| { |
| struct minix2_inode *inode; |
| int ino; |
| char *name; |
| int block; |
| |
| block = map_block2(dir, offset / BLOCK_SIZE); |
| read_block(block, check_file_blk); |
| name = check_file_blk + (offset % BLOCK_SIZE) + 2; |
| ino = *(uint16_t *) (name - 2); |
| if (ino > INODES) { |
| printf("%s contains a bad inode number for file '%.*s'. ", |
| current_name, namelen, name); |
| if (ask("Remove", 1)) { |
| *(uint16_t *) (name - 2) = 0; |
| write_block(block, check_file_blk); |
| } |
| ino = 0; |
| } |
| push_filename(name); |
| inode = get_inode2(ino); |
| pop_filename(); |
| if (!offset) { |
| if (inode && LONE_CHAR(name, '.')) |
| return; |
| printf("%s: bad directory: '.' isn't first\n", current_name); |
| errors_uncorrected = 1; |
| } |
| if (offset == dirsize) { |
| if (inode && strcmp("..", name) == 0) |
| return; |
| printf("%s: bad directory: '..' isn't second\n", current_name); |
| errors_uncorrected = 1; |
| } |
| if (!inode) |
| return; |
| push_filename(name); |
| if (OPT_list) { |
| if (OPT_verbose) |
| printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks); |
| printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : ""); |
| } |
| check_zones2(ino); |
| if (inode && S_ISDIR(inode->i_mode)) |
| recursive_check2(ino); |
| pop_filename(); |
| } |
| #endif |
| |
| static void recursive_check(unsigned ino) |
| { |
| struct minix1_inode *dir; |
| unsigned offset; |
| |
| dir = Inode1 + ino; |
| if (!S_ISDIR(dir->i_mode)) |
| die("internal error"); |
| if (dir->i_size < 2 * dirsize) { |
| printf("%s: bad directory: size<32", current_name); |
| errors_uncorrected = 1; |
| } |
| for (offset = 0; offset < dir->i_size; offset += dirsize) |
| check_file(dir, offset); |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static void recursive_check2(unsigned ino) |
| { |
| struct minix2_inode *dir; |
| unsigned offset; |
| |
| dir = Inode2 + ino; |
| if (!S_ISDIR(dir->i_mode)) |
| die("internal error"); |
| if (dir->i_size < 2 * dirsize) { |
| printf("%s: bad directory: size<32", current_name); |
| errors_uncorrected = 1; |
| } |
| for (offset = 0; offset < dir->i_size; offset += dirsize) |
| check_file2(dir, offset); |
| } |
| #endif |
| |
| static int bad_zone(int i) |
| { |
| char buffer[BLOCK_SIZE]; |
| |
| xlseek(dev_fd, BLOCK_SIZE * i, SEEK_SET); |
| return (BLOCK_SIZE != full_read(dev_fd, buffer, BLOCK_SIZE)); |
| } |
| |
| static void check_counts(void) |
| { |
| int i; |
| |
| for (i = 1; i <= INODES; i++) { |
| if (OPT_warn_mode && Inode1[i].i_mode && !inode_in_use(i)) { |
| printf("Inode %d has non-zero mode. ", i); |
| if (ask("Clear", 1)) { |
| Inode1[i].i_mode = 0; |
| changed = 1; |
| } |
| } |
| if (!inode_count[i]) { |
| if (!inode_in_use(i)) |
| continue; |
| printf("Unused inode %d is marked as 'used' in the bitmap. ", i); |
| if (ask("Clear", 1)) |
| unmark_inode(i); |
| continue; |
| } |
| if (!inode_in_use(i)) { |
| printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i); |
| if (ask("Set", 1)) |
| mark_inode(i); |
| } |
| if (Inode1[i].i_nlinks != inode_count[i]) { |
| printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ", |
| i, Inode1[i].i_mode, Inode1[i].i_nlinks, |
| inode_count[i]); |
| if (ask("Set i_nlinks to count", 1)) { |
| Inode1[i].i_nlinks = inode_count[i]; |
| changed = 1; |
| } |
| } |
| } |
| for (i = FIRSTZONE; i < ZONES; i++) { |
| if ((zone_in_use(i) != 0) == zone_count[i]) |
| continue; |
| if (!zone_count[i]) { |
| if (bad_zone(i)) |
| continue; |
| printf("Zone %d is marked 'in use', but no file uses it. ", i); |
| if (ask("Unmark", 1)) |
| unmark_zone(i); |
| continue; |
| } |
| printf("Zone %d: %sin use, counted=%d\n", |
| i, zone_in_use(i) ? "" : "not ", zone_count[i]); |
| } |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static void check_counts2(void) |
| { |
| int i; |
| |
| for (i = 1; i <= INODES; i++) { |
| if (OPT_warn_mode && Inode2[i].i_mode && !inode_in_use(i)) { |
| printf("Inode %d has non-zero mode. ", i); |
| if (ask("Clear", 1)) { |
| Inode2[i].i_mode = 0; |
| changed = 1; |
| } |
| } |
| if (!inode_count[i]) { |
| if (!inode_in_use(i)) |
| continue; |
| printf("Unused inode %d is marked as 'used' in the bitmap. ", i); |
| if (ask("Clear", 1)) |
| unmark_inode(i); |
| continue; |
| } |
| if (!inode_in_use(i)) { |
| printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i); |
| if (ask("Set", 1)) |
| mark_inode(i); |
| } |
| if (Inode2[i].i_nlinks != inode_count[i]) { |
| printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ", |
| i, Inode2[i].i_mode, Inode2[i].i_nlinks, |
| inode_count[i]); |
| if (ask("Set i_nlinks to count", 1)) { |
| Inode2[i].i_nlinks = inode_count[i]; |
| changed = 1; |
| } |
| } |
| } |
| for (i = FIRSTZONE; i < ZONES; i++) { |
| if ((zone_in_use(i) != 0) == zone_count[i]) |
| continue; |
| if (!zone_count[i]) { |
| if (bad_zone(i)) |
| continue; |
| printf("Zone %d is marked 'in use', but no file uses it. ", i); |
| if (ask("Unmark", 1)) |
| unmark_zone(i); |
| continue; |
| } |
| printf("Zone %d: %sin use, counted=%d\n", |
| i, zone_in_use(i) ? "" : "not ", zone_count[i]); |
| } |
| } |
| #endif |
| |
| static void check(void) |
| { |
| memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count)); |
| memset(zone_count, 0, ZONES * sizeof(*zone_count)); |
| check_zones(MINIX_ROOT_INO); |
| recursive_check(MINIX_ROOT_INO); |
| check_counts(); |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static void check2(void) |
| { |
| memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count)); |
| memset(zone_count, 0, ZONES * sizeof(*zone_count)); |
| check_zones2(MINIX_ROOT_INO); |
| recursive_check2(MINIX_ROOT_INO); |
| check_counts2(); |
| } |
| #else |
| void check2(void); |
| #endif |
| |
| int fsck_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int fsck_minix_main(int argc UNUSED_PARAM, char **argv) |
| { |
| struct termios tmp; |
| int retcode = 0; |
| |
| xfunc_error_retval = 8; |
| |
| INIT_G(); |
| |
| opt_complementary = "=1:ar"; /* one argument; -a assumes -r */ |
| getopt32(argv, OPTION_STR); |
| argv += optind; |
| device_name = argv[0]; |
| |
| check_mount(); /* trying to check a mounted filesystem? */ |
| if (OPT_manual) { |
| if (!isatty(0) || !isatty(1)) |
| die("need terminal for interactive repairs"); |
| } |
| xmove_fd(xopen(device_name, OPT_repair ? O_RDWR : O_RDONLY), dev_fd); |
| |
| /*sync(); paranoia? */ |
| read_superblock(); |
| |
| /* |
| * Determine whether or not we should continue with the checking. |
| * This is based on the status of the filesystem valid and error |
| * flags and whether or not the -f switch was specified on the |
| * command line. |
| */ |
| printf("%s: %s\n", applet_name, bb_banner); |
| |
| if (!(Super.s_state & MINIX_ERROR_FS) |
| && (Super.s_state & MINIX_VALID_FS) && !OPT_force |
| ) { |
| if (OPT_repair) |
| printf("%s is clean, check is skipped\n", device_name); |
| return 0; |
| } else if (OPT_force) |
| printf("Forcing filesystem check on %s\n", device_name); |
| else if (OPT_repair) |
| printf("Filesystem on %s is dirty, needs checking\n", |
| device_name); |
| |
| read_tables(); |
| |
| if (OPT_manual) { |
| tcgetattr(0, &sv_termios); |
| tmp = sv_termios; |
| tmp.c_lflag &= ~(ICANON | ECHO); |
| tcsetattr_stdin_TCSANOW(&tmp); |
| termios_set = 1; |
| } |
| |
| if (version2) { |
| check_root2(); |
| check2(); |
| } else { |
| check_root(); |
| check(); |
| } |
| |
| if (OPT_verbose) { |
| int i, free_cnt; |
| |
| for (i = 1, free_cnt = 0; i <= INODES; i++) |
| if (!inode_in_use(i)) |
| free_cnt++; |
| printf("\n%6u inodes used (%u%%)\n", (INODES - free_cnt), |
| 100 * (INODES - free_cnt) / INODES); |
| for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++) |
| if (!zone_in_use(i)) |
| free_cnt++; |
| printf("%6u zones used (%u%%)\n\n" |
| "%6u regular files\n" |
| "%6u directories\n" |
| "%6u character device files\n" |
| "%6u block device files\n" |
| "%6u links\n" |
| "%6u symbolic links\n" |
| "------\n" |
| "%6u files\n", |
| (ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES, |
| regular, directory, chardev, blockdev, |
| links - 2 * directory + 1, symlinks, |
| total - 2 * directory + 1); |
| } |
| if (changed) { |
| write_tables(); |
| printf("FILE SYSTEM HAS BEEN CHANGED\n"); |
| sync(); |
| } else if (OPT_repair) |
| write_superblock(); |
| |
| if (OPT_manual) |
| tcsetattr_stdin_TCSANOW(&sv_termios); |
| |
| if (changed) |
| retcode += 3; |
| if (errors_uncorrected) |
| retcode += 4; |
| return retcode; |
| } |