| /* 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 tarball for details. |
| */ |
| |
| /* |
| * 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 |
| * super-block 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 Mi¶kiewicz <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 super-block 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 :-). |
| */ |
| |
| #include "libbb.h" |
| #include <mntent.h> |
| |
| #include "minix.h" |
| |
| #ifndef BLKGETSIZE |
| #define BLKGETSIZE _IO(0x12,96) /* return device size */ |
| #endif |
| |
| #ifdef UNUSED |
| enum { |
| 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 */ |
| NAME_MAX = 255, /* # chars in a file name */ |
| }; |
| #endif |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static smallint version2; |
| #else |
| enum { version2 = 0 }; |
| #endif |
| |
| #define PROGRAM_VERSION "1.2 - 11/11/96" |
| static smallint repair, automatic, verbose, list, show, warn_mode, force; |
| static smallint changed; /* is filesystem modified? */ |
| static smallint errors_uncorrected; /* flag if some error was not corrected */ |
| |
| static smallint termios_set; |
| static struct termios termios; |
| |
| static char *device_name; |
| static int IN; |
| static int directory, regular, blockdev, chardev, links, symlinks, total; |
| |
| //also smallint? |
| static int dirsize = 16; |
| static int namelen = 14; |
| |
| static char *inode_buffer; |
| |
| static struct { |
| char super_block_buffer[BLOCK_SIZE]; |
| char add_zone_ind_blk[BLOCK_SIZE]; |
| char add_zone_dind_blk[BLOCK_SIZE]; |
| USE_FEATURE_MINIX2(char add_zone_tind_blk[BLOCK_SIZE];) |
| char check_file_blk[BLOCK_SIZE]; |
| } *blockbuf; |
| |
| #define Inode1 (((struct minix1_inode *) inode_buffer)-1) |
| #define Inode2 (((struct minix2_inode *) inode_buffer)-1) |
| |
| #define Super (*(struct minix_super_block *)(blockbuf->super_block_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 ATTRIBUTE_ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n) |
| { |
| return (size + n-1) / n; |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| #define INODE_BLOCKS div_roundup(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \ |
| : MINIX1_INODES_PER_BLOCK)) |
| #else |
| #define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK) |
| #endif |
| |
| #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE) |
| #define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS) |
| |
| static char *inode_map; |
| static char *zone_map; |
| |
| static unsigned char *inode_count; |
| static unsigned char *zone_count; |
| |
| /* 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) ATTRIBUTE_NORETURN; |
| static void die(const char *str) |
| { |
| if (termios_set) |
| tcsetattr(0, TCSANOW, &termios); |
| bb_error_msg_and_die("%s", str); |
| } |
| |
| /* File-name data */ |
| enum { MAX_DEPTH = 32 }; |
| static int name_depth; |
| static char *current_name; |
| static char *name_component[MAX_DEPTH+1]; |
| |
| /* Wed Feb 9 15:17:06 MST 2000 */ |
| /* dynamically allocate name_list (instead of making it static) */ |
| static void alloc_current_name(void) |
| { |
| current_name = xmalloc(MAX_DEPTH * (BUFSIZ + 1)); |
| current_name[0] = '/'; |
| current_name[1] = '\0'; |
| name_component[0] = ¤t_name[0]; |
| } |
| |
| #if ENABLE_FEATURE_CLEAN_UP |
| /* execute this atexit() to deallocate name_list[] */ |
| /* piptigger was here */ |
| static void free_current_name(void) |
| { |
| free(current_name); |
| } |
| #endif |
| |
| 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 (!repair) { |
| puts(""); |
| errors_uncorrected = 1; |
| return 0; |
| } |
| if (automatic) { |
| puts(""); |
| if (!def) |
| errors_uncorrected = 1; |
| return def; |
| } |
| printf(def ? "%s (y/n)? " : "%s (n/y)? ", string); |
| for (;;) { |
| fflush(stdout); |
| c = getchar(); |
| if (c == EOF) { |
| if (!def) |
| errors_uncorrected = 1; |
| return def; |
| } |
| c = toupper(c); |
| if (c == 'Y') { |
| def = 1; |
| break; |
| } else if (c == 'N') { |
| def = 0; |
| break; |
| } else if (c == ' ' || c == '\n') |
| 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) |
| { |
| FILE *f; |
| struct mntent *mnt; |
| int cont; |
| int fd; |
| |
| f = setmntent(MOUNTED, "r"); |
| if (f == NULL) |
| return; |
| while ((mnt = getmntent(f)) != NULL) |
| if (strcmp(device_name, mnt->mnt_fsname) == 0) |
| break; |
| endmntent(f); |
| if (!mnt) |
| return; |
| |
| /* |
| * If the root is mounted read-only, then /etc/mtab is |
| * probably not correct; so we won't issue a warning based on |
| * it. |
| */ |
| fd = open(MOUNTED, O_RDWR); |
| if (fd < 0 && errno == EROFS) |
| return; |
| close(fd); |
| |
| 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(0); |
| } |
| } |
| |
| /* |
| * 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, char *addr) |
| { |
| if (!nr) { |
| memset(addr, 0, BLOCK_SIZE); |
| return; |
| } |
| if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET)) { |
| printf("%s: cannot seek to block in file '%s'\n", |
| bb_msg_read_error, current_name); |
| errors_uncorrected = 1; |
| memset(addr, 0, BLOCK_SIZE); |
| } else if (BLOCK_SIZE != read(IN, addr, BLOCK_SIZE)) { |
| printf("%s: bad block in file '%s'\n", |
| bb_msg_read_error, current_name); |
| errors_uncorrected = 1; |
| memset(addr, 0, BLOCK_SIZE); |
| } |
| } |
| |
| /* |
| * write_block writes block nr to disk. |
| */ |
| static void write_block(unsigned nr, char *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; |
| } |
| if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET)) |
| die("seek failed in write_block"); |
| if (BLOCK_SIZE != write(IN, addr, BLOCK_SIZE)) { |
| printf("%s: bad block in file '%s'\n", |
| bb_msg_write_error, 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]; |
| uint16_t dind[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); |
| read_block(block, (char *) ind); |
| blk_chg = 0; |
| result = check_zone_nr(blknr + ind, &blk_chg); |
| if (blk_chg) |
| write_block(block, (char *) ind); |
| return result; |
| } |
| blknr -= 512; |
| block = check_zone_nr(inode->i_zone + 8, &changed); |
| read_block(block, (char *) dind); |
| blk_chg = 0; |
| result = check_zone_nr(dind + (blknr / 512), &blk_chg); |
| if (blk_chg) |
| write_block(block, (char *) dind); |
| block = result; |
| read_block(block, (char *) ind); |
| blk_chg = 0; |
| result = check_zone_nr(ind + (blknr % 512), &blk_chg); |
| if (blk_chg) |
| write_block(block, (char *) ind); |
| return result; |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static int map_block2(struct minix2_inode *inode, unsigned blknr) |
| { |
| uint32_t ind[BLOCK_SIZE >> 2]; |
| uint32_t dind[BLOCK_SIZE >> 2]; |
| uint32_t tind[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); |
| read_block(block, (char *) ind); |
| blk_chg = 0; |
| result = check_zone_nr2(blknr + ind, &blk_chg); |
| if (blk_chg) |
| write_block(block, (char *) ind); |
| return result; |
| } |
| blknr -= 256; |
| if (blknr >= 256 * 256) { |
| block = check_zone_nr2(inode->i_zone + 8, &changed); |
| read_block(block, (char *) dind); |
| blk_chg = 0; |
| result = check_zone_nr2(dind + blknr / 256, &blk_chg); |
| if (blk_chg) |
| write_block(block, (char *) dind); |
| block = result; |
| read_block(block, (char *) ind); |
| blk_chg = 0; |
| result = check_zone_nr2(ind + blknr % 256, &blk_chg); |
| if (blk_chg) |
| write_block(block, (char *) ind); |
| return result; |
| } |
| blknr -= 256 * 256; |
| block = check_zone_nr2(inode->i_zone + 9, &changed); |
| read_block(block, (char *) tind); |
| blk_chg = 0; |
| result = check_zone_nr2(tind + blknr / (256 * 256), &blk_chg); |
| if (blk_chg) |
| write_block(block, (char *) tind); |
| block = result; |
| read_block(block, (char *) dind); |
| blk_chg = 0; |
| result = check_zone_nr2(dind + (blknr / 256) % 256, &blk_chg); |
| if (blk_chg) |
| write_block(block, (char *) dind); |
| block = result; |
| read_block(block, (char *) ind); |
| blk_chg = 0; |
| result = check_zone_nr2(ind + blknr % 256, &blk_chg); |
| if (blk_chg) |
| write_block(block, (char *) ind); |
| return result; |
| } |
| #endif |
| |
| static void write_super_block(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; |
| |
| if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET)) |
| die("seek failed in write_super_block"); |
| if (BLOCK_SIZE != write(IN, blockbuf->super_block_buffer, BLOCK_SIZE)) |
| die("cannot write super-block"); |
| } |
| |
| static void write_tables(void) |
| { |
| write_super_block(); |
| |
| if (IMAPS * BLOCK_SIZE != write(IN, inode_map, IMAPS * BLOCK_SIZE)) |
| die("cannot write inode map"); |
| if (ZMAPS * BLOCK_SIZE != write(IN, zone_map, ZMAPS * BLOCK_SIZE)) |
| die("cannot write zone map"); |
| if (INODE_BUFFER_SIZE != write(IN, inode_buffer, INODE_BUFFER_SIZE)) |
| die("cannot 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) |
| { |
| if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET)) |
| die("seek failed"); |
| if (BLOCK_SIZE != read(IN, blockbuf->super_block_buffer, BLOCK_SIZE)) |
| die("cannot read super block"); |
| /* 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 super-block"); |
| 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 super-block"); |
| if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1) |
| die("bad s_zmap_blocks field in super-block"); |
| } |
| |
| 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(IN, inode_map, IMAPS * BLOCK_SIZE)) |
| die("cannot read inode map"); |
| if (ZMAPS * BLOCK_SIZE != read(IN, zone_map, ZMAPS * BLOCK_SIZE)) |
| die("cannot read zone map"); |
| if (INODE_BUFFER_SIZE != read(IN, inode_buffer, INODE_BUFFER_SIZE)) |
| die("cannot read inodes"); |
| if (NORM_FIRSTZONE != FIRSTZONE) { |
| printf("warning: firstzone!=norm_firstzone\n"); |
| errors_uncorrected = 1; |
| } |
| get_dirsize(); |
| if (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 struct minix1_inode *get_inode(unsigned nr) |
| { |
| struct minix1_inode *inode; |
| |
| if (!nr || nr > INODES) |
| return NULL; |
| total++; |
| inode = Inode1 + nr; |
| 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 (repair) { |
| if (ask("Mark as 'in use'", 1)) |
| mark_inode(nr); |
| else |
| errors_uncorrected = 1; |
| } |
| } |
| if (S_ISDIR(inode->i_mode)) |
| directory++; |
| else if (S_ISREG(inode->i_mode)) |
| regular++; |
| else if (S_ISCHR(inode->i_mode)) |
| chardev++; |
| else if (S_ISBLK(inode->i_mode)) |
| blockdev++; |
| else if (S_ISLNK(inode->i_mode)) |
| symlinks++; |
| else if (S_ISSOCK(inode->i_mode)); |
| else if (S_ISFIFO(inode->i_mode)); |
| else { |
| printf("%s has mode %05o\n", current_name, inode->i_mode); |
| } |
| |
| } else |
| links++; |
| if (!++inode_count[nr]) { |
| printf("Warning: inode count too big\n"); |
| inode_count[nr]--; |
| errors_uncorrected = 1; |
| } |
| return inode; |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static struct minix2_inode *get_inode2(unsigned nr) |
| { |
| struct minix2_inode *inode; |
| |
| if (!nr || nr > INODES) |
| return NULL; |
| total++; |
| inode = Inode2 + nr; |
| 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 (repair) { |
| if (ask("Mark as 'in use'", 1)) |
| mark_inode(nr); |
| else |
| errors_uncorrected = 1; |
| } |
| } |
| if (S_ISDIR(inode->i_mode)) |
| directory++; |
| else if (S_ISREG(inode->i_mode)) |
| regular++; |
| else if (S_ISCHR(inode->i_mode)) |
| chardev++; |
| else if (S_ISBLK(inode->i_mode)) |
| blockdev++; |
| else if (S_ISLNK(inode->i_mode)) |
| symlinks++; |
| else if (S_ISSOCK(inode->i_mode)); |
| else if (S_ISFIFO(inode->i_mode)); |
| else { |
| printf("%s has mode %05o\n", current_name, inode->i_mode); |
| } |
| } else |
| links++; |
| if (!++inode_count[nr]) { |
| printf("Warning: inode count too big\n"); |
| inode_count[nr]--; |
| errors_uncorrected = 1; |
| } |
| 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(uint16_t *znr, smallint *corrected) |
| { |
| int result; |
| int block; |
| |
| result = 0; |
| block = check_zone_nr(znr, corrected); |
| if (!block) |
| return 0; |
| if (zone_count[block]) { |
| printf("Already used block is reused in file '%s'. ", |
| current_name); |
| if (ask("Clear", 1)) { |
| *znr = 0; |
| block = 0; |
| *corrected = 1; |
| return 0; |
| } |
| } |
| 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; |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static int add_zone2(uint32_t *znr, smallint *corrected) |
| { |
| int result; |
| int block; |
| |
| result = 0; |
| block = check_zone_nr2(znr, corrected); |
| if (!block) |
| return 0; |
| if (zone_count[block]) { |
| printf("Already used block is reused in file '%s'. ", |
| current_name); |
| if (ask("Clear", 1)) { |
| *znr = 0; |
| block = 0; |
| *corrected = 1; |
| return 0; |
| } |
| } |
| 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; |
| } |
| #endif |
| |
| static void add_zone_ind(uint16_t *znr, smallint *corrected) |
| { |
| #define blk (blockbuf->add_zone_ind_blk) |
| int i; |
| int block; |
| smallint chg_blk = 0; |
| |
| block = add_zone(znr, corrected); |
| if (!block) |
| return; |
| read_block(block, blk); |
| for (i = 0; i < (BLOCK_SIZE >> 1); i++) |
| add_zone(i + (uint16_t *) blk, &chg_blk); |
| if (chg_blk) |
| write_block(block, blk); |
| #undef blk |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static void add_zone_ind2(uint32_t *znr, smallint *corrected) |
| { |
| #define blk (blockbuf->add_zone_ind_blk) |
| int i; |
| int block; |
| smallint chg_blk = 0; |
| |
| block = add_zone2(znr, corrected); |
| if (!block) |
| return; |
| read_block(block, blk); |
| for (i = 0; i < BLOCK_SIZE >> 2; i++) |
| add_zone2(i + (uint32_t *) blk, &chg_blk); |
| if (chg_blk) |
| write_block(block, blk); |
| #undef blk |
| } |
| #endif |
| |
| static void add_zone_dind(uint16_t *znr, smallint *corrected) |
| { |
| #define blk (blockbuf->add_zone_dind_blk) |
| int i; |
| int block; |
| smallint chg_blk = 0; |
| |
| block = add_zone(znr, corrected); |
| if (!block) |
| return; |
| read_block(block, blk); |
| for (i = 0; i < (BLOCK_SIZE >> 1); i++) |
| add_zone_ind(i + (uint16_t *) blk, &chg_blk); |
| if (chg_blk) |
| write_block(block, blk); |
| #undef blk |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static void add_zone_dind2(uint32_t *znr, smallint *corrected) |
| { |
| #define blk (blockbuf->add_zone_dind_blk) |
| int i; |
| int block; |
| smallint chg_blk = 0; |
| |
| block = add_zone2(znr, corrected); |
| if (!block) |
| return; |
| read_block(block, blk); |
| for (i = 0; i < BLOCK_SIZE >> 2; i++) |
| add_zone_ind2(i + (uint32_t *) blk, &chg_blk); |
| if (chg_blk) |
| write_block(block, blk); |
| #undef blk |
| } |
| |
| static void add_zone_tind2(uint32_t *znr, smallint *corrected) |
| { |
| #define blk (blockbuf->add_zone_tind_blk) |
| int i; |
| int block; |
| smallint chg_blk = 0; |
| |
| block = add_zone2(znr, corrected); |
| if (!block) |
| return; |
| read_block(block, blk); |
| for (i = 0; i < BLOCK_SIZE >> 2; i++) |
| add_zone_dind2(i + (uint32_t *) blk, &chg_blk); |
| if (chg_blk) |
| write_block(block, blk); |
| #undef 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) |
| { |
| #define blk (blockbuf->check_file_blk) |
| struct minix1_inode *inode; |
| int ino; |
| char *name; |
| int block; |
| |
| block = map_block(dir, offset / BLOCK_SIZE); |
| read_block(block, blk); |
| name = 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, 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 (list) { |
| if (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(); |
| #undef blk |
| } |
| |
| #if ENABLE_FEATURE_MINIX2 |
| static void check_file2(struct minix2_inode *dir, unsigned offset) |
| { |
| #define blk (blockbuf->check_file_blk) |
| struct minix2_inode *inode; |
| int ino; |
| char *name; |
| int block; |
| |
| block = map_block2(dir, offset / BLOCK_SIZE); |
| read_block(block, blk); |
| name = 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, 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 (list) { |
| if (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(); |
| #undef blk |
| } |
| #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]; |
| |
| if (BLOCK_SIZE * i != lseek(IN, BLOCK_SIZE * i, SEEK_SET)) |
| die("seek failed in bad_zone"); |
| return (BLOCK_SIZE != read(IN, buffer, BLOCK_SIZE)); |
| } |
| |
| static void check_counts(void) |
| { |
| int i; |
| |
| for (i = 1; i <= INODES; i++) { |
| if (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 (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); |
| int fsck_minix_main(int argc, char **argv) |
| { |
| struct termios tmp; |
| int retcode = 0; |
| |
| xfunc_error_retval = 8; |
| blockbuf = xzalloc(sizeof(*blockbuf)); |
| |
| alloc_current_name(); |
| #if ENABLE_FEATURE_CLEAN_UP |
| /* Don't bother to free memory. Exit does |
| * that automagically, so we can save a few bytes */ |
| atexit(free_current_name); |
| #endif |
| |
| if (INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE) |
| die("bad inode size"); |
| #if ENABLE_FEATURE_MINIX2 |
| if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) |
| die("bad v2 inode size"); |
| #endif |
| while (--argc != 0) { |
| argv++; |
| if (argv[0][0] != '-') { |
| if (device_name) |
| bb_show_usage(); |
| device_name = argv[0]; |
| } else { |
| while (*++argv[0]) { |
| switch (argv[0][0]) { |
| case 'l': |
| list = 1; |
| break; |
| case 'a': |
| automatic = 1; |
| repair = 1; |
| break; |
| case 'r': |
| automatic = 0; |
| repair = 1; |
| break; |
| case 'v': |
| verbose = 1; |
| break; |
| case 's': |
| show = 1; |
| break; |
| case 'm': |
| warn_mode = 1; |
| break; |
| case 'f': |
| force = 1; |
| break; |
| default: |
| bb_show_usage(); |
| } |
| } |
| } |
| } |
| if (!device_name) |
| bb_show_usage(); |
| |
| check_mount(); /* trying to check a mounted filesystem? */ |
| if (repair && !automatic) { |
| if (!isatty(0) || !isatty(1)) |
| die("need terminal for interactive repairs"); |
| } |
| IN = xopen(device_name, repair ? O_RDWR : O_RDONLY); |
| |
| /*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, "PROGRAM_VERSION"\n", applet_name); |
| |
| if (!(Super.s_state & MINIX_ERROR_FS) |
| && (Super.s_state & MINIX_VALID_FS) && !force |
| ) { |
| if (repair) |
| printf("%s is clean, check is skipped\n", device_name); |
| return 0; |
| } else if (force) |
| printf("Forcing filesystem check on %s\n", device_name); |
| else if (repair) |
| printf("Filesystem on %s is dirty, needs checking\n", |
| device_name); |
| |
| read_tables(); |
| |
| if (repair && !automatic) { |
| tcgetattr(0, &termios); |
| tmp = termios; |
| tmp.c_lflag &= ~(ICANON | ECHO); |
| tcsetattr(0, TCSANOW, &tmp); |
| termios_set = 1; |
| } |
| |
| if (version2) { |
| check_root2(); |
| check2(); |
| } else { |
| check_root(); |
| check(); |
| } |
| |
| if (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 (repair) |
| write_super_block(); |
| |
| if (repair && !automatic) |
| tcsetattr(0, TCSANOW, &termios); |
| |
| if (changed) |
| retcode += 3; |
| if (errors_uncorrected) |
| retcode += 4; |
| return retcode; |
| } |