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hush/fsck_minix.c
Eric Andersen 56f3e353da Both of these commands were subtly broken. Fortunately when used together the 
damage was only ugly fscks.  Reverted to the static inline code so they work
correctly again,
 -Erik
2000-09-19 21:13:55 +00:00

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/* 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<4D>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 "internal.h"
#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>
typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned int u32;
#define MINIX_ROOT_INO 1
#define MINIX_LINK_MAX 250
#define MINIX2_LINK_MAX 65530
#define MINIX_I_MAP_SLOTS 8
#define MINIX_Z_MAP_SLOTS 64
#define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
#define MINIX2_SUPER_MAGIC 0x2468 /* minix V2 fs */
#define MINIX2_SUPER_MAGIC2 0x2478 /* minix V2 fs, 30 char names */
#define MINIX_VALID_FS 0x0001 /* Clean fs. */
#define 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)))
#define MINIX_V1 0x0001 /* original minix fs */
#define 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 {
u16 i_mode;
u16 i_uid;
u32 i_size;
u32 i_time;
u8 i_gid;
u8 i_nlinks;
u16 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 {
u16 i_mode;
u16 i_nlinks;
u16 i_uid;
u16 i_gid;
u32 i_size;
u32 i_atime;
u32 i_mtime;
u32 i_ctime;
u32 i_zone[10];
};
/*
* minix super-block data on disk
*/
struct minix_super_block {
u16 s_ninodes;
u16 s_nzones;
u16 s_imap_blocks;
u16 s_zmap_blocks;
u16 s_firstdatazone;
u16 s_log_zone_size;
u32 s_max_size;
u16 s_magic;
u16 s_state;
u32 s_zones;
};
struct minix_dir_entry {
u16 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)))
#define MINIX_VALID_FS 0x0001 /* Clean fs. */
#define MINIX_ERROR_FS 0x0002 /* fs has errors. */
#define MINIX_SUPER_MAGIC 0x137F /* original minix fs */
#define MINIX_SUPER_MAGIC2 0x138F /* minix fs, 30 char names */
#ifndef BLKGETSIZE
#define BLKGETSIZE _IO(0x12,96) /* return device size */
#endif
#ifndef __linux__
#define volatile
#endif
#define 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 */
#define 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 show_usage(void)
{
usage(fsck_minix_usage);
}
static void die(const char *str)
{
errorMsg("%s\n", 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);
}
}
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
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)
die("unable to open '%s'");
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;
for (i = 1, free = 0; i <= INODES; i++)
if (!inode_in_use(i))
free++;
printf("\n%6ld inodes used (%ld%%)\n", (INODES - free),
100 * (INODES - free) / INODES);
for (i = FIRSTZONE, free = 0; i < ZONES; i++)
if (!zone_in_use(i))
free++;
printf("%6ld zones used (%ld%%)\n", (ZONES - free),
100 * (ZONES - free) / 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;
}
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