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Diffstat (limited to 'fsck_minix.c')
| -rw-r--r-- | fsck_minix.c | 1478 |
1 files changed, 0 insertions, 1478 deletions
diff --git a/fsck_minix.c b/fsck_minix.c deleted file mode 100644 index 952968d..0000000 --- a/fsck_minix.c +++ /dev/null @@ -1,1478 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * fsck.c - a file system consistency checker for Linux. - * - * (C) 1991, 1992 Linus Torvalds. This file may be redistributed - * as per the GNU copyleft. - */ - -/* - * 09.11.91 - made the first rudimetary 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 systemindependent. - * (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). - * - * Usuage: 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 <stdio.h> -#include <errno.h> -#include <unistd.h> -#include <string.h> -#include <fcntl.h> -#include <ctype.h> -#include <stdlib.h> -#include <termios.h> -#include <mntent.h> -#include <sys/param.h> -#include "busybox.h" - -static const int MINIX_ROOT_INO = 1; -static const int MINIX_LINK_MAX = 250; -static const int MINIX2_LINK_MAX = 65530; - -static const int MINIX_I_MAP_SLOTS = 8; -static const int MINIX_Z_MAP_SLOTS = 64; -static const int MINIX_SUPER_MAGIC = 0x137F; /* original minix fs */ -static const int MINIX_SUPER_MAGIC2 = 0x138F; /* minix fs, 30 char names */ -static const int MINIX2_SUPER_MAGIC = 0x2468; /* minix V2 fs */ -static const int MINIX2_SUPER_MAGIC2 = 0x2478; /* minix V2 fs, 30 char names */ -static const int MINIX_VALID_FS = 0x0001; /* Clean fs. */ -static const int MINIX_ERROR_FS = 0x0002; /* fs has errors. */ - -#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode))) -#define MINIX2_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix2_inode))) - -static const int MINIX_V1 = 0x0001; /* original minix fs */ -static const int MINIX_V2 = 0x0002; /* minix V2 fs */ - -#define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version - -/* - * This is the original minix inode layout on disk. - * Note the 8-bit gid and atime and ctime. - */ -struct minix_inode { - u_int16_t i_mode; - u_int16_t i_uid; - u_int32_t i_size; - u_int32_t i_time; - u_int8_t i_gid; - u_int8_t i_nlinks; - u_int16_t i_zone[9]; -}; - -/* - * The new minix inode has all the time entries, as well as - * long block numbers and a third indirect block (7+1+1+1 - * instead of 7+1+1). Also, some previously 8-bit values are - * now 16-bit. The inode is now 64 bytes instead of 32. - */ -struct minix2_inode { - u_int16_t i_mode; - u_int16_t i_nlinks; - u_int16_t i_uid; - u_int16_t i_gid; - u_int32_t i_size; - u_int32_t i_atime; - u_int32_t i_mtime; - u_int32_t i_ctime; - u_int32_t i_zone[10]; -}; - -/* - * minix super-block data on disk - */ -struct minix_super_block { - u_int16_t s_ninodes; - u_int16_t s_nzones; - u_int16_t s_imap_blocks; - u_int16_t s_zmap_blocks; - u_int16_t s_firstdatazone; - u_int16_t s_log_zone_size; - u_int32_t s_max_size; - u_int16_t s_magic; - u_int16_t s_state; - u_int32_t s_zones; -}; - -struct minix_dir_entry { - u_int16_t inode; - char name[0]; -}; - -#define BLOCK_SIZE_BITS 10 -#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS) - -#define NAME_MAX 255 /* # chars in a file name */ - -#define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode))) - -#ifndef BLKGETSIZE -#define BLKGETSIZE _IO(0x12,96) /* return device size */ -#endif - -#ifndef __linux__ -#define volatile -#endif - -static const int ROOT_INO = 1; - -#define UPPER(size,n) ((size+((n)-1))/(n)) -#define INODE_SIZE (sizeof(struct minix_inode)) -#ifdef BB_FEATURE_MINIX2 -#define INODE_SIZE2 (sizeof(struct minix2_inode)) -#define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \ - : MINIX_INODES_PER_BLOCK)) -#else -#define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK)) -#endif -#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE) - -#define BITS_PER_BLOCK (BLOCK_SIZE<<3) - -static char *program_version = "1.2 - 11/11/96"; -static char *device_name = NULL; -static int IN; -static int repair = 0, automatic = 0, verbose = 0, list = 0, show = - 0, warn_mode = 0, force = 0; -static int directory = 0, regular = 0, blockdev = 0, chardev = 0, links = - 0, symlinks = 0, total = 0; - -static int changed = 0; /* flags if the filesystem has been changed */ -static int errors_uncorrected = 0; /* flag if some error was not corrected */ -static int dirsize = 16; -static int namelen = 14; -static int version2 = 0; -static struct termios termios; -static int termios_set = 0; - -/* File-name data */ -static const int MAX_DEPTH = 32; -static int name_depth = 0; -// static char name_list[MAX_DEPTH][BUFSIZ + 1]; -static char **name_list = NULL; - -static char *inode_buffer = NULL; - -#define Inode (((struct minix_inode *) inode_buffer)-1) -#define Inode2 (((struct minix2_inode *) inode_buffer)-1) -static char super_block_buffer[BLOCK_SIZE]; - -#define Super (*(struct minix_super_block *)super_block_buffer) -#define INODES ((unsigned long)Super.s_ninodes) -#ifdef BB_FEATURE_MINIX2 -#define ZONES ((unsigned long)(version2 ? Super.s_zones : Super.s_nzones)) -#else -#define ZONES ((unsigned long)(Super.s_nzones)) -#endif -#define IMAPS ((unsigned long)Super.s_imap_blocks) -#define ZMAPS ((unsigned long)Super.s_zmap_blocks) -#define FIRSTZONE ((unsigned long)Super.s_firstdatazone) -#define ZONESIZE ((unsigned long)Super.s_log_zone_size) -#define MAXSIZE ((unsigned long)Super.s_max_size) -#define MAGIC (Super.s_magic) -#define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS) - -static char *inode_map; -static char *zone_map; - -static unsigned char *inode_count = NULL; -static unsigned char *zone_count = NULL; - -static void recursive_check(unsigned int ino); -#ifdef BB_FEATURE_MINIX2 -static void recursive_check2(unsigned int ino); -#endif - -static inline int bit(char * a,unsigned int i) -{ - return (a[i >> 3] & (1<<(i & 7))) != 0; -} -#define inode_in_use(x) (bit(inode_map,(x))) -#define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1)) - -#define mark_inode(x) (setbit(inode_map,(x)),changed=1) -#define unmark_inode(x) (clrbit(inode_map,(x)),changed=1) - -#define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1),changed=1) -#define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1),changed=1) - -static void leave(int) __attribute__ ((noreturn)); -static void leave(int status) -{ - if (termios_set) - tcsetattr(0, TCSANOW, &termios); - exit(status); -} - -static void die(const char *str) -{ - error_msg("%s", str); - leave(8); -} - -/* - * This simply goes through the file-name data and prints out the - * current file. - */ -static void print_current_name(void) -{ - int i = 0; - - while (i < name_depth) - printf("/%.*s", namelen, name_list[i++]); - if (i == 0) - printf("/"); -} - -static int ask(const char *string, int def) -{ - int c; - - if (!repair) { - printf("\n"); - errors_uncorrected = 1; - return 0; - } - if (automatic) { - printf("\n"); - if (!def) - errors_uncorrected = 1; - return def; - } - printf(def ? "%s (y/n)? " : "%s (n/y)? ", string); - for (;;) { - fflush(stdout); - if ((c = getchar()) == 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; - - if ((f = setmntent(MOUNTED, "r")) == 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; - else - close(fd); - - printf("%s is mounted. ", device_name); - if (isatty(0) && isatty(1)) - cont = ask("Do you really want to continue", 0); - else - cont = 0; - if (!cont) { - printf("check aborted.\n"); - exit(0); - } - return; -} - -/* - * 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_nr(unsigned short *nr, int *corrected) -{ - if (!*nr) - return 0; - if (*nr < FIRSTZONE) - printf("Zone nr < FIRSTZONE in file `"); - else if (*nr >= ZONES) - printf("Zone nr >= ZONES in file `"); - else - return *nr; - print_current_name(); - printf("'."); - if (ask("Remove block", 1)) { - *nr = 0; - *corrected = 1; - } - return 0; -} - -#ifdef BB_FEATURE_MINIX2 -static int check_zone_nr2(unsigned int *nr, int *corrected) -{ - if (!*nr) - return 0; - if (*nr < FIRSTZONE) - printf("Zone nr < FIRSTZONE in file `"); - else if (*nr >= ZONES) - printf("Zone nr >= ZONES in file `"); - else - return *nr; - print_current_name(); - printf("'."); - if (ask("Remove block", 1)) { - *nr = 0; - *corrected = 1; - } - return 0; -} -#endif - -/* - * read-block reads block nr into the buffer at addr. - */ -static void read_block(unsigned int nr, char *addr) -{ - if (!nr) { - memset(addr, 0, BLOCK_SIZE); - return; - } - if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET)) { - printf("Read error: unable to seek to block in file '"); - print_current_name(); - printf("'\n"); - memset(addr, 0, BLOCK_SIZE); - errors_uncorrected = 1; - } else if (BLOCK_SIZE != read(IN, addr, BLOCK_SIZE)) { - printf("Read error: bad block in file '"); - print_current_name(); - printf("'\n"); - memset(addr, 0, BLOCK_SIZE); - errors_uncorrected = 1; - } -} - -/* - * write_block writes block nr to disk. - */ -static void write_block(unsigned int 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("Write error: bad block in file '"); - print_current_name(); - printf("'\n"); - 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 minix_inode *inode, unsigned int blknr) -{ - unsigned short ind[BLOCK_SIZE >> 1]; - unsigned short dind[BLOCK_SIZE >> 1]; - int blk_chg, block, result; - - 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; -} - -#ifdef BB_FEATURE_MINIX2 -static int map_block2(struct minix2_inode *inode, unsigned int blknr) -{ - unsigned int ind[BLOCK_SIZE >> 2]; - unsigned int dind[BLOCK_SIZE >> 2]; - unsigned int tind[BLOCK_SIZE >> 2]; - int blk_chg, block, result; - - 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; - if (errors_uncorrected) - Super.s_state |= MINIX_ERROR_FS; - else - 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, super_block_buffer, BLOCK_SIZE)) - die("unable to write super-block"); - - return; -} - -static void write_tables(void) -{ - write_super_block(); - - if (IMAPS * BLOCK_SIZE != write(IN, inode_map, IMAPS * BLOCK_SIZE)) - die("Unable to write inode map"); - if (ZMAPS * BLOCK_SIZE != write(IN, zone_map, ZMAPS * BLOCK_SIZE)) - die("Unable to write zone map"); - if (INODE_BUFFER_SIZE != write(IN, inode_buffer, INODE_BUFFER_SIZE)) - die("Unable to write inodes"); -} - -static void get_dirsize(void) -{ - int block; - char blk[BLOCK_SIZE]; - int size; - -#ifdef BB_FEATURE_MINIX2 - if (version2) - block = Inode2[ROOT_INO].i_zone[0]; - else -#endif - block = Inode[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, super_block_buffer, BLOCK_SIZE)) - die("unable to read super block"); - if (MAGIC == MINIX_SUPER_MAGIC) { - namelen = 14; - dirsize = 16; - version2 = 0; - } else if (MAGIC == MINIX_SUPER_MAGIC2) { - namelen = 30; - dirsize = 32; - version2 = 0; -#ifdef BB_FEATURE_MINIX2 - } else if (MAGIC == MINIX2_SUPER_MAGIC) { - namelen = 14; - dirsize = 16; - 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 = xmalloc(IMAPS * BLOCK_SIZE); - zone_map = xmalloc(ZMAPS * BLOCK_SIZE); - memset(inode_map, 0, sizeof(inode_map)); - memset(zone_map, 0, sizeof(zone_map)); - 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("Unable to read inode map"); - if (ZMAPS * BLOCK_SIZE != read(IN, zone_map, ZMAPS * BLOCK_SIZE)) - die("Unable to read zone map"); - if (INODE_BUFFER_SIZE != read(IN, inode_buffer, INODE_BUFFER_SIZE)) - die("Unable to read inodes"); - if (NORM_FIRSTZONE != FIRSTZONE) { - printf("Warning: Firstzone != Norm_firstzone\n"); - errors_uncorrected = 1; - } - get_dirsize(); - if (show) { - printf("%ld inodes\n", INODES); - printf("%ld blocks\n", ZONES); - printf("Firstdatazone=%ld (%ld)\n", FIRSTZONE, NORM_FIRSTZONE); - printf("Zonesize=%d\n", BLOCK_SIZE << ZONESIZE); - printf("Maxsize=%ld\n", MAXSIZE); - printf("Filesystem state=%d\n", Super.s_state); - printf("namelen=%d\n\n", namelen); - } -} - -static struct minix_inode *get_inode(unsigned int nr) -{ - struct minix_inode *inode; - - if (!nr || nr > INODES) - return NULL; - total++; - inode = Inode + nr; - if (!inode_count[nr]) { - if (!inode_in_use(nr)) { - printf("Inode %d marked not used, but used for file '", nr); - print_current_name(); - printf("'\n"); - if (repair) { - if (ask("Mark 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 { - print_current_name(); - printf(" has mode %05o\n", inode->i_mode); - } - - } else - links++; - if (!++inode_count[nr]) { - printf("Warning: inode count too big.\n"); - inode_count[nr]--; - errors_uncorrected = 1; - } - return inode; -} - -#ifdef BB_FEATURE_MINIX2 -static struct minix2_inode *get_inode2(unsigned int 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 marked not used, but used for file '", nr); - print_current_name(); - printf("'\n"); - if (repair) { - if (ask("Mark 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 { - print_current_name(); - printf(" has mode %05o\n", 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 minix_inode *inode = Inode + ROOT_INO; - - if (!inode || !S_ISDIR(inode->i_mode)) - die("root inode isn't a directory"); -} - -#ifdef BB_FEATURE_MINIX2 -static void check_root2(void) -{ - struct minix2_inode *inode = Inode2 + ROOT_INO; - - if (!inode || !S_ISDIR(inode->i_mode)) - die("root inode isn't a directory"); -} -#endif - -static int add_zone(unsigned short *znr, int *corrected) -{ - int result; - int block; - - result = 0; - block = check_zone_nr(znr, corrected); - if (!block) - return 0; - if (zone_count[block]) { - printf("Block has been used before. Now in file `"); - print_current_name(); - printf("'."); - if (ask("Clear", 1)) { - *znr = 0; - block = 0; - *corrected = 1; - } - } - if (!block) - return 0; - if (!zone_in_use(block)) { - printf("Block %d in file `", block); - print_current_name(); - printf("' is marked not in use."); - if (ask("Correct", 1)) - mark_zone(block); - } - if (!++zone_count[block]) - zone_count[block]--; - return block; -} - -#ifdef BB_FEATURE_MINIX2 -static int add_zone2(unsigned int *znr, int *corrected) -{ - int result; - int block; - - result = 0; - block = check_zone_nr2(znr, corrected); - if (!block) - return 0; - if (zone_count[block]) { - printf("Block has been used before. Now in file `"); - print_current_name(); - printf("'."); - if (ask("Clear", 1)) { - *znr = 0; - block = 0; - *corrected = 1; - } - } - if (!block) - return 0; - if (!zone_in_use(block)) { - printf("Block %d in file `", block); - print_current_name(); - printf("' is marked not in use."); - if (ask("Correct", 1)) - mark_zone(block); - } - if (!++zone_count[block]) - zone_count[block]--; - return block; -} -#endif - -static void add_zone_ind(unsigned short *znr, int *corrected) -{ - static char blk[BLOCK_SIZE]; - int i, chg_blk = 0; - int block; - - block = add_zone(znr, corrected); - if (!block) - return; - read_block(block, blk); - for (i = 0; i < (BLOCK_SIZE >> 1); i++) - add_zone(i + (unsigned short *) blk, &chg_blk); - if (chg_blk) - write_block(block, blk); -} - -#ifdef BB_FEATURE_MINIX2 -static void add_zone_ind2(unsigned int *znr, int *corrected) -{ - static char blk[BLOCK_SIZE]; - int i, chg_blk = 0; - int block; - - block = add_zone2(znr, corrected); - if (!block) - return; - read_block(block, blk); - for (i = 0; i < BLOCK_SIZE >> 2; i++) - add_zone2(i + (unsigned int *) blk, &chg_blk); - if (chg_blk) - write_block(block, blk); -} -#endif - -static void add_zone_dind(unsigned short *znr, int *corrected) -{ - static char blk[BLOCK_SIZE]; - int i, blk_chg = 0; - int block; - - block = add_zone(znr, corrected); - if (!block) - return; - read_block(block, blk); - for (i = 0; i < (BLOCK_SIZE >> 1); i++) - add_zone_ind(i + (unsigned short *) blk, &blk_chg); - if (blk_chg) - write_block(block, blk); -} - -#ifdef BB_FEATURE_MINIX2 -static void add_zone_dind2(unsigned int *znr, int *corrected) -{ - static char blk[BLOCK_SIZE]; - int i, blk_chg = 0; - int block; - - block = add_zone2(znr, corrected); - if (!block) - return; - read_block(block, blk); - for (i = 0; i < BLOCK_SIZE >> 2; i++) - add_zone_ind2(i + (unsigned int *) blk, &blk_chg); - if (blk_chg) - write_block(block, blk); -} - -static void add_zone_tind2(unsigned int *znr, int *corrected) -{ - static char blk[BLOCK_SIZE]; - int i, blk_chg = 0; - int block; - - block = add_zone2(znr, corrected); - if (!block) - return; - read_block(block, blk); - for (i = 0; i < BLOCK_SIZE >> 2; i++) - add_zone_dind2(i + (unsigned int *) blk, &blk_chg); - if (blk_chg) - write_block(block, blk); -} -#endif - -static void check_zones(unsigned int i) -{ - struct minix_inode *inode; - - if (!i || i > INODES) - return; - if (inode_count[i] > 1) /* have we counted this file already? */ - return; - inode = Inode + 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); -} - -#ifdef BB_FEATURE_MINIX2 -static void check_zones2(unsigned int 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 minix_inode *dir, unsigned int offset) -{ - static char blk[BLOCK_SIZE]; - struct minix_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 = *(unsigned short *) (name - 2); - if (ino > INODES) { - print_current_name(); - printf(" contains a bad inode number for file '"); - printf("%.*s'.", namelen, name); - if (ask(" Remove", 1)) { - *(unsigned short *) (name - 2) = 0; - write_block(block, blk); - } - ino = 0; - } - if (name_depth < MAX_DEPTH) - strncpy(name_list[name_depth], name, namelen); - name_depth++; - inode = get_inode(ino); - name_depth--; - if (!offset) { - if (!inode || strcmp(".", name)) { - print_current_name(); - printf(": bad directory: '.' isn't first\n"); - errors_uncorrected = 1; - } else - return; - } - if (offset == dirsize) { - if (!inode || strcmp("..", name)) { - print_current_name(); - printf(": bad directory: '..' isn't second\n"); - errors_uncorrected = 1; - } else - return; - } - if (!inode) - return; - if (name_depth < MAX_DEPTH) - strncpy(name_list[name_depth], name, namelen); - name_depth++; - if (list) { - if (verbose) - printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks); - print_current_name(); - if (S_ISDIR(inode->i_mode)) - printf(":\n"); - else - printf("\n"); - } - check_zones(ino); - if (inode && S_ISDIR(inode->i_mode)) - recursive_check(ino); - name_depth--; - return; -} - -#ifdef BB_FEATURE_MINIX2 -static void check_file2(struct minix2_inode *dir, unsigned int offset) -{ - static char blk[BLOCK_SIZE]; - 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 = *(unsigned short *) (name - 2); - if (ino > INODES) { - print_current_name(); - printf(" contains a bad inode number for file '"); - printf("%.*s'.", namelen, name); - if (ask(" Remove", 1)) { - *(unsigned short *) (name - 2) = 0; - write_block(block, blk); - } - ino = 0; - } - if (name_depth < MAX_DEPTH) - strncpy(name_list[name_depth], name, namelen); - name_depth++; - inode = get_inode2(ino); - name_depth--; - if (!offset) { - if (!inode || strcmp(".", name)) { - print_current_name(); - printf(": bad directory: '.' isn't first\n"); - errors_uncorrected = 1; - } else - return; - } - if (offset == dirsize) { - if (!inode || strcmp("..", name)) { - print_current_name(); - printf(": bad directory: '..' isn't second\n"); - errors_uncorrected = 1; - } else - return; - } - if (!inode) - return; - name_depth++; - if (list) { - if (verbose) - printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks); - print_current_name(); - if (S_ISDIR(inode->i_mode)) - printf(":\n"); - else - printf("\n"); - } - check_zones2(ino); - if (inode && S_ISDIR(inode->i_mode)) - recursive_check2(ino); - name_depth--; - return; -} -#endif - -static void recursive_check(unsigned int ino) -{ - struct minix_inode *dir; - unsigned int offset; - - dir = Inode + ino; - if (!S_ISDIR(dir->i_mode)) - die("internal error"); - if (dir->i_size < 2 * dirsize) { - print_current_name(); - printf(": bad directory: size<32"); - errors_uncorrected = 1; - } - for (offset = 0; offset < dir->i_size; offset += dirsize) - check_file(dir, offset); -} - -#ifdef BB_FEATURE_MINIX2 -static void recursive_check2(unsigned int ino) -{ - struct minix2_inode *dir; - unsigned int offset; - - dir = Inode2 + ino; - if (!S_ISDIR(dir->i_mode)) - die("internal error"); - if (dir->i_size < 2 * dirsize) { - print_current_name(); - printf(": bad directory: size < 32"); - 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[1024]; - - 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 (!inode_in_use(i) && Inode[i].i_mode && warn_mode) { - printf("Inode %d mode not cleared.", i); - if (ask("Clear", 1)) { - Inode[i].i_mode = 0; - changed = 1; - } - } - if (!inode_count[i]) { - if (!inode_in_use(i)) - continue; - printf("Inode %d not used, marked used in the bitmap.", i); - if (ask("Clear", 1)) - unmark_inode(i); - continue; - } - if (!inode_in_use(i)) { - printf("Inode %d used, marked unused in the bitmap.", i); - if (ask("Set", 1)) - mark_inode(i); - } - if (Inode[i].i_nlinks != inode_count[i]) { - printf("Inode %d (mode = %07o), i_nlinks=%d, counted=%d.", - i, Inode[i].i_mode, Inode[i].i_nlinks, inode_count[i]); - if (ask("Set i_nlinks to count", 1)) { - Inode[i].i_nlinks = inode_count[i]; - changed = 1; - } - } - } - for (i = FIRSTZONE; i < ZONES; i++) { - if (zone_in_use(i) == zone_count[i]) - continue; - if (!zone_count[i]) { - if (bad_zone(i)) - continue; - printf("Zone %d: marked in use, 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]); - } -} - -#ifdef BB_FEATURE_MINIX2 -static void check_counts2(void) -{ - int i; - - for (i = 1; i <= INODES; i++) { - if (!inode_in_use(i) && Inode2[i].i_mode && warn_mode) { - printf("Inode %d mode not cleared.", i); - if (ask("Clear", 1)) { - Inode2[i].i_mode = 0; - changed = 1; - } - } - if (!inode_count[i]) { - if (!inode_in_use(i)) - continue; - printf("Inode %d not used, marked used in the bitmap.", i); - if (ask("Clear", 1)) - unmark_inode(i); - continue; - } - if (!inode_in_use(i)) { - printf("Inode %d used, marked 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) == zone_count[i]) - continue; - if (!zone_count[i]) { - if (bad_zone(i)) - continue; - printf("Zone %d: marked in use, 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(ROOT_INO); - recursive_check(ROOT_INO); - check_counts(); -} - -#ifdef BB_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(ROOT_INO); - recursive_check2(ROOT_INO); - check_counts2(); -} -#endif - -/* Wed Feb 9 15:17:06 MST 2000 */ -/* dynamically allocate name_list (instead of making it static) */ -static void alloc_name_list(void) -{ - int i; - - name_list = xmalloc(sizeof(char *) * MAX_DEPTH); - for (i = 0; i < MAX_DEPTH; i++) - name_list[i] = xmalloc(sizeof(char) * BUFSIZ + 1); -} - -#ifdef BB_FEATURE_CLEAN_UP -/* execute this atexit() to deallocate name_list[] */ -/* piptigger was here */ -static void free_name_list(void) -{ - int i; - - if (name_list) { - for (i = 0; i < MAX_DEPTH; i++) { - if (name_list[i]) { - free(name_list[i]); - } - } - free(name_list); - } -} -#endif - -extern int fsck_minix_main(int argc, char **argv) -{ - struct termios tmp; - int count; - int retcode = 0; - - alloc_name_list(); -#ifdef BB_FEATURE_CLEAN_UP - /* Don't bother to free memory. Exit does - * that automagically, so we can save a few bytes */ - atexit(free_name_list); -#endif - - if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE) - die("bad inode size"); -#ifdef BB_FEATURE_MINIX2 - if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) - die("bad v2 inode size"); -#endif - while (argc-- > 1) { - argv++; - if (argv[0][0] != '-') { - if (device_name) - show_usage(); - else - 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: - show_usage(); - } - } - if (!device_name) - 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 = open(device_name, repair ? O_RDWR : O_RDONLY); - if (IN < 0){ - fprintf(stderr,"unable to open device '%s'.\n",device_name); - leave(8); - } - for (count = 0; count < 3; count++) - sync(); - 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, program_version); - if (!(Super.s_state & MINIX_ERROR_FS) && - (Super.s_state & MINIX_VALID_FS) && !force) { - if (repair) - printf("%s is clean, no check.\n", device_name); - return retcode; - } 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; - } -#ifdef BB_FEATURE_MINIX2 - if (version2) { - check_root2(); - check2(); - } else -#endif - { - 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%6ld inodes used (%ld%%)\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("%6ld zones used (%ld%%)\n", (ZONES - free_cnt), - 100 * (ZONES - free_cnt) / ZONES); - printf("\n%6d regular files\n" - "%6d directories\n" - "%6d character device files\n" - "%6d block device files\n" - "%6d links\n" - "%6d symbolic links\n" - "------\n" - "%6d files\n", - regular, directory, chardev, blockdev, - links - 2 * directory + 1, symlinks, - total - 2 * directory + 1); - } - if (changed) { - write_tables(); - printf("----------------------------\n" - "FILE SYSTEM HAS BEEN CHANGED\n" - "----------------------------\n"); - for (count = 0; count < 3; count++) - 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; -} |