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fsck.minix.c
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fsck.minix.c
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/*
* 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@pld.ORG.PL>
* - added Native Language Support
*
* 2008-04-06 James Youngman <jay@gnu.org>
* - Issue better error message if we fail to open the device.
* - Restore terminal state if we get a fatal signal.
*
*
* 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 <stdarg.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/stat.h>
#include <signal.h>
#include "minix.h"
#include "nls.h"
#include "pathnames.h"
#ifndef __linux__
#define volatile
#endif
#define ROOT_INO 1
#define UPPER(size,n) ((size+((n)-1))/(n))
#define INODE_SIZE (sizeof(struct minix_inode))
#define INODE_SIZE2 (sizeof(struct minix2_inode))
#define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
: MINIX_INODES_PER_BLOCK))
#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
#define BITS_PER_BLOCK (BLOCK_SIZE<<3)
static char * program_name = "fsck.minix";
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 volatile sig_atomic_t termios_set = 0;
/* File-name data */
#define MAX_DEPTH 50
static int name_depth = 0;
static char name_list[MAX_DEPTH][NAME_MAX+1];
/* Copy of the previous, just for error reporting - see get_current_name */
/* This is a waste of 12kB or so. */
static char current_name[MAX_DEPTH*(NAME_MAX+1)+1];
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)
#define ZONES ((unsigned long)(version2 ? Super.s_zones : Super.s_nzones))
#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);
static void recursive_check2(unsigned int ino);
#include "bitops.h"
#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
reset(void) {
if (termios_set)
tcsetattr(0, TCSANOW, &termios);
}
static void
fatalsig(int sig) {
/* We received a fatal signal. Reset the terminal.
* Also reset the signal handler and re-send the signal,
* so that the parent process knows which signal actually
* caused our death.
*/
signal(sig, SIG_DFL);
reset();
raise(sig);
}
static void
leave(int status) {
reset();
exit(status);
}
static void
usage(void) {
fprintf(stderr,
_("Usage: %s [-larvsmf] /dev/name\n"),
program_name);
leave(16);
}
static void die(const char *fmt, ...)
__attribute__ ((__format__ (__printf__, 1, 2)));
static void
die(const char *fmt, ...) {
va_list ap;
fprintf(stderr, "%s: ", program_name);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end (ap);
fputc('\n', stderr);
leave(8);
}
/*
* This simply goes through the file-name data and prints out the
* current file.
*/
static void
get_current_name(void) {
int i = 0, ct;
char *p, *q;
q = current_name;
while (i < name_depth) {
p = name_list[i++];
ct = namelen;
*q++ = '/';
while (ct-- && *p)
*q++ = *p++;
}
if (i == 0)
*q++ = '/';
*q = 0;
}
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 (_PATH_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(_PATH_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) {
get_current_name();
printf(_("Zone nr < FIRSTZONE in file `%s'."),
current_name);
} else if (*nr >= ZONES) {
get_current_name();
printf(_("Zone nr >= ZONES in file `%s'."),
current_name);
} else
return *nr;
if (ask(_("Remove block"),1)) {
*nr = 0;
*corrected = 1;
}
return 0;
}
static int
check_zone_nr2 (unsigned int *nr, int *corrected) {
if (!*nr)
return 0;
if (*nr < FIRSTZONE) {
get_current_name();
printf (_("Zone nr < FIRSTZONE in file `%s'."),
current_name);
} else if (*nr >= ZONES) {
get_current_name();
printf (_("Zone nr >= ZONES in file `%s'."),
current_name);
} else
return *nr;
if (ask (_("Remove block"), 1)) {
*nr = 0;
*corrected = 1;
}
return 0;
}
/*
* 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)) {
get_current_name();
printf(_("Read error: unable to seek to block in file '%s'\n"),
current_name);
memset(addr,0,BLOCK_SIZE);
errors_uncorrected = 1;
} else if (BLOCK_SIZE != read(IN, addr, BLOCK_SIZE)) {
get_current_name();
printf(_("Read error: bad block in file '%s'\n"),
current_name);
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)) {
get_current_name();
printf(_("Write error: bad block in file '%s'\n"),
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 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;
}
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;
}
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;
if (version2)
block = Inode2[ROOT_INO].i_zone[0];
else
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;
} else if (MAGIC == MINIX2_SUPER_MAGIC) {
namelen = 14;
dirsize = 16;
version2 = 1;
} else if (MAGIC == MINIX2_SUPER_MAGIC2) {
namelen = 30;
dirsize = 32;
version2 = 1;
} 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 = malloc(IMAPS * BLOCK_SIZE);
if (!inode_map)
die(_("Unable to allocate buffer for inode map"));
zone_map = malloc(ZMAPS * BLOCK_SIZE);
if (!inode_map)
die(_("Unable to allocate buffer for zone map"));
memset(inode_map,0,sizeof(inode_map));
memset(zone_map,0,sizeof(zone_map));
inode_buffer = malloc(INODE_BUFFER_SIZE);
if (!inode_buffer)
die(_("Unable to allocate buffer for inodes"));
inode_count = malloc(INODES + 1);
if (!inode_count)
die(_("Unable to allocate buffer for inode count"));
zone_count = malloc(ZONES);
if (!zone_count)
die(_("Unable to allocate buffer for zone count"));
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)) {
get_current_name();
printf(_("Inode %d marked unused, "
"but used for file '%s'\n"),
nr, current_name);
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 {
get_current_name();
printf(_("The file `%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;
}
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)) {
get_current_name();
printf (_("Inode %d marked unused, "
"but used for file '%s'\n"),
nr, current_name);
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 {
get_current_name ();
printf (_("The file `%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;
}
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"));
}
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"));
}
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]) {
get_current_name();
printf(_("Block has been used before. Now in file `%s'."),
current_name);
if (ask(_("Clear"),1)) {
*znr = 0;
block = 0;
*corrected = 1;
}
}
if (!block)
return 0;
if (!zone_in_use(block)) {
get_current_name();
printf(_("Block %d in file `%s' is marked not in use."),
block, current_name);
if (ask(_("Correct"),1))
mark_zone(block);
}
if (!++zone_count[block])
zone_count[block]--;
return block;
}
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]) {
get_current_name();
printf (_("Block has been used before. Now in file `%s'."),
current_name);
if (ask (_("Clear"), 1)) {
*znr = 0;
block = 0;
*corrected = 1;
}
}
if (!block)
return 0;
if (!zone_in_use (block)) {
get_current_name();
printf (_("Block %d in file `%s' is marked not in use."),
block, current_name);
if (ask (_("Correct"), 1))
mark_zone (block);
}
if (!++zone_count[block])
zone_count[block]--;
return block;
}
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);
}
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);
}
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);
}
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);
}
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);
}
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);
}
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) {
get_current_name();
printf(_("The directory '%s' contains a bad inode number "
"for file '%.*s'."),
current_name, 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)) {
get_current_name();
printf(_("%s: bad directory: '.' isn't first\n"),
current_name);
errors_uncorrected = 1;
} else return;
}
if (offset == dirsize) {
if (!inode || strcmp("..",name)) {
get_current_name();
printf(_("%s: bad directory: '..' isn't second\n"),
current_name);