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util-linux/disk-utils/fsck.minix.c

1414 lines
36 KiB

/*
* fsck.minix.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 rudimentary functions
*
* 10.11.91 - updated, does checking, no repairs yet.
* Sent out to the mailing-list for testing.
*
* 14.11.91 - Testing seems to have gone well. Added some
* correction-code, and changed some functions.
*
* 15.11.91 - More correction code. Hopefully it notices most
* cases now, and tries to do something about them.
*
* 16.11.91 - More corrections (thanks to Mika Jalava). Most
* things seem to work now. Yeah, sure.
*
*
* 19.04.92 - Had to start over again from this old version, as a
* kernel bug ate my enhanced fsck in February.
*
* 28.02.93 - added support for different directory entry sizes..
*
* Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with
* super-block information
*
* Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform
* to that required by fsutil
*
* Mon Jan 3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu)
* Added support for file system valid flag. Also
* added program_version variable and output of
* program name and version number when program
* is executed.
*
* 30.10.94 - added support for v2 filesystem
* (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
*
* 10.12.94 - added test to prevent checking of mounted fs adapted
* from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck
* program. (Daniel Quinlan, quinlan@yggdrasil.com)
*
* 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such
* for modern libcs (janl@math.uio.no, Nicolai Langfeldt)
*
* 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk
* (Russell King). He made them for ARM. It would seem
* that the ARM is powerful enough to do this in C whereas
* i386 and m64k must use assembly to get it fast >:-)
* This should make minix fsck 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 Miśkiewicz <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).
*
*/
#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 <sys/stat.h>
#include <signal.h>
#include <getopt.h>
#include "c.h"
#include "exitcodes.h"
#include "minix_programs.h"
#include "nls.h"
#include "pathnames.h"
#include "bitops.h"
#include "ismounted.h"
#include "all-io.h"
#include "closestream.h"
#include "rpmatch.h"
#include "strutils.h"
#define ROOT_INO 1
#define YESNO_LENGTH 64
/* Global variables used in minix_programs.h inline functions */
int fs_version = 1;
char *super_block_buffer;
static char *inode_buffer;
#define Inode (((struct minix_inode *) inode_buffer) - 1)
#define Inode2 (((struct minix2_inode *) inode_buffer) - 1)
static char *device_name;
static int device_fd;
static int repair, automatic, verbose, list, show, warn_mode, force;
static int directory, regular, blockdev, chardev, links, symlinks, total;
static int changed; /* flags if the filesystem has been changed */
static int errors_uncorrected; /* flag if some error was not corrected */
static size_t dirsize = 16;
static size_t namelen = 14;
static struct termios termios;
static volatile sig_atomic_t termios_set;
/* File-name data */
#define MAX_DEPTH 50
static int name_depth;
static char name_list[MAX_DEPTH][MINIX_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 * (MINIX_NAME_MAX + 1) + 1];
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);
static char *inode_map;
static char *zone_map;
#define inode_in_use(x) (isset(inode_map,(x)) != 0)
#define zone_in_use(x) (isset(zone_map,(x)-get_first_zone()+1) != 0)
#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)-get_first_zone()+1),changed=1)
#define unmark_zone(x) (clrbit(zone_map,(x)-get_first_zone()+1),changed=1)
static void
reset(void) {
if (termios_set)
tcsetattr(STDIN_FILENO, 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 __attribute__((__noreturn__))
leave(int status) {
reset();
exit(status);
}
static void
usage(FILE *out) {
fputs(USAGE_HEADER, out);
fprintf(out, _(" %s [options] <device>\n"), program_invocation_short_name);
fputs(USAGE_SEPARATOR, out);
fputs(_("Check the consistency of a Minix filesystem.\n"), out);
fputs(USAGE_OPTIONS, out);
fputs(_(" -l, --list list all filenames\n"), out);
fputs(_(" -a, --auto automatic repair\n"), out);
fputs(_(" -r, --repair interactive repair\n"), out);
fputs(_(" -v, --verbose be verbose\n"), out);
fputs(_(" -s, --super output super-block information\n"), out);
fputs(_(" -m, --uncleared activate mode not cleared warnings\n"), out);
fputs(_(" -f, --force force check\n"), out);
fputs(USAGE_SEPARATOR, out);
fputs(USAGE_HELP, out);
fputs(USAGE_VERSION, out);
fprintf(out, USAGE_MAN_TAIL("fsck.minix(8)"));
leave(out == stderr ? FSCK_EX_USAGE : FSCK_EX_OK);
}
static void die(const char *fmt, ...)
__attribute__ ((__format__(__printf__, 1, 2)));
static void
die(const char *fmt, ...) {
va_list ap;
fprintf(stderr, UTIL_LINUX_VERSION);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fputc('\n', stderr);
leave(FSCK_EX_ERROR);
}
/* 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 resp;
char input[YESNO_LENGTH];
if (!repair) {
printf("\n");
errors_uncorrected = 1;
return 0;
}
if (automatic) {
printf("\n");
if (!def)
errors_uncorrected = 1;
return def;
}
/* TRANSLATORS: these yes no questions uses rpmatch(), and should be
* translated. */
printf(def ? _("%s (y/n)? ") : _("%s (n/y)? "), string);
fflush(stdout);
ignore_result( fgets(input, YESNO_LENGTH, stdin) );
resp = rpmatch(input);
switch (resp) {
case RPMATCH_INVALID:
/* def = def */
break;
case RPMATCH_NO:
case RPMATCH_YES:
def = resp;
break;
default:
/* rpmatch bug? */
abort();
}
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) {
int cont;
if (!is_mounted(device_name))
return;
printf(_("%s is mounted. "), device_name);
if (isatty(STDIN_FILENO) && isatty(STDOUT_FILENO))
cont = ask(_("Do you really want to continue"), 0);
else
cont = 0;
if (!cont) {
printf(_("check aborted.\n"));
exit(FSCK_EX_OK);
}
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 < get_first_zone()) {
get_current_name();
printf(_("Zone nr < FIRSTZONE in file `%s'."), current_name);
} else if (*nr >= get_nzones()) {
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 < get_first_zone()) {
get_current_name();
printf(_("Zone nr < FIRSTZONE in file `%s'."), current_name);
} else if (*nr >= get_nzones()) {
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, MINIX_BLOCK_SIZE);
return;
}
if (MINIX_BLOCK_SIZE * nr != lseek(device_fd, MINIX_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, MINIX_BLOCK_SIZE);
errors_uncorrected = 1;
} else if (MINIX_BLOCK_SIZE != read(device_fd, addr, MINIX_BLOCK_SIZE)) {
get_current_name();
printf(_("Read error: bad block in file '%s'\n"), current_name);
memset(addr, 0, MINIX_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 < get_first_zone() || nr >= get_nzones()) {
printf(_("Internal error: trying to write bad block\n"
"Write request ignored\n"));
errors_uncorrected = 1;
return;
}
if (MINIX_BLOCK_SIZE * nr != lseek(device_fd, MINIX_BLOCK_SIZE * nr, SEEK_SET))
die(_("seek failed in write_block"));
if (MINIX_BLOCK_SIZE != write(device_fd, addr, MINIX_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[MINIX_BLOCK_SIZE >> 1];
unsigned short dind[MINIX_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[MINIX_BLOCK_SIZE >> 2];
unsigned int dind[MINIX_BLOCK_SIZE >> 2];
unsigned int tind[MINIX_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) {
/* v3 super block does not track state */
if (fs_version == 3)
return;
/* 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 (MINIX_BLOCK_SIZE != lseek(device_fd, MINIX_BLOCK_SIZE, SEEK_SET))
die(_("seek failed in write_super_block"));
if (MINIX_BLOCK_SIZE != write(device_fd, super_block_buffer, MINIX_BLOCK_SIZE))
die(_("unable to write super-block"));
return;
}
static void
write_tables(void) {
unsigned long buffsz = get_inode_buffer_size();
unsigned long imaps = get_nimaps();
unsigned long zmaps = get_nzmaps();
write_super_block();
if (write_all(device_fd, inode_map, imaps * MINIX_BLOCK_SIZE))
die(_("Unable to write inode map"));
if (write_all(device_fd, zone_map, zmaps * MINIX_BLOCK_SIZE))
die(_("Unable to write zone map"));
if (write_all(device_fd, inode_buffer, buffsz))
die(_("Unable to write inodes"));
}
static void
get_dirsize(void) {
int block;
char blk[MINIX_BLOCK_SIZE];
size_t size;
if (fs_version == 2 || fs_version == 3)
block = Inode2[ROOT_INO].i_zone[0];
else
block = Inode[ROOT_INO].i_zone[0];
read_block(block, blk);
for (size = 16; size < MINIX_BLOCK_SIZE; size <<= 1) {
if (strcmp(blk + size + 2, "..") == 0) {
dirsize = size;
namelen = size - 2;
return;
}
}
/* use defaults */
}
static void
read_superblock(void) {
if (MINIX_BLOCK_SIZE != lseek(device_fd, MINIX_BLOCK_SIZE, SEEK_SET))
die(_("seek failed"));
super_block_buffer = calloc(1, MINIX_BLOCK_SIZE);
if (!super_block_buffer)
die(_("unable to alloc buffer for superblock"));
if (MINIX_BLOCK_SIZE != read(device_fd, super_block_buffer, MINIX_BLOCK_SIZE))
die(_("unable to read super block"));
if (Super.s_magic == MINIX_SUPER_MAGIC) {
namelen = 14;
dirsize = 16;
fs_version = 1;
} else if (Super.s_magic == MINIX_SUPER_MAGIC2) {
namelen = 30;
dirsize = 32;
fs_version = 1;
} else if (Super.s_magic == MINIX2_SUPER_MAGIC) {
namelen = 14;
dirsize = 16;
fs_version = 2;
} else if (Super.s_magic == MINIX2_SUPER_MAGIC2) {
namelen = 30;
dirsize = 32;
fs_version = 2;
} else if (Super3.s_magic == MINIX3_SUPER_MAGIC) {
namelen = 60;
dirsize = 64;
fs_version = 3;
} else
die(_("bad magic number in super-block"));
if (get_zone_size() != 0 || MINIX_BLOCK_SIZE != 1024)
die(_("Only 1k blocks/zones supported"));
if (get_ninodes() == 0 || get_ninodes() == UINT32_MAX)
die(_("bad s_ninodes field in super-block"));
if (get_nimaps() * MINIX_BLOCK_SIZE * 8 < get_ninodes() + 1)
die(_("bad s_imap_blocks field in super-block"));
if (get_first_zone() > (off_t) get_nzones())
die(_("bad s_firstdatazone field in super-block"));
if (get_nzmaps() * MINIX_BLOCK_SIZE * 8 <
get_nzones() - get_first_zone() + 1)
die(_("bad s_zmap_blocks field in super-block"));
}
static void
read_tables(void) {
unsigned long inodes = get_ninodes();
size_t buffsz = get_inode_buffer_size();
off_t norm_first_zone = first_zone_data();
off_t first_zone = get_first_zone();
unsigned long zones = get_nzones();
unsigned long imaps = get_nimaps();
unsigned long zmaps = get_nzmaps();
ssize_t rc;
inode_map = malloc(imaps * MINIX_BLOCK_SIZE);
if (!inode_map)
die(_("Unable to allocate buffer for inode map"));
zone_map = malloc(zmaps * MINIX_BLOCK_SIZE);
if (!zone_map)
die(_("Unable to allocate buffer for zone map"));
inode_buffer = malloc(buffsz);
if (!inode_buffer)
die(_("Unable to allocate buffer for inodes"));
inode_count = calloc(1, inodes + 1);
if (!inode_count)
die(_("Unable to allocate buffer for inode count"));
zone_count = calloc(1, zones);
if (!zone_count)
die(_("Unable to allocate buffer for zone count"));
rc = read(device_fd, inode_map, imaps * MINIX_BLOCK_SIZE);
if (rc < 0 || imaps * MINIX_BLOCK_SIZE != (size_t) rc)
die(_("Unable to read inode map"));
rc = read(device_fd, zone_map, zmaps * MINIX_BLOCK_SIZE);
if (rc < 0 || zmaps * MINIX_BLOCK_SIZE != (size_t) rc)
die(_("Unable to read zone map"));
rc = read(device_fd, inode_buffer, buffsz);
if (rc < 0 || buffsz != (size_t) rc)
die(_("Unable to read inodes"));
if (norm_first_zone != first_zone) {
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=%jd (%jd)\n"),
(intmax_t)first_zone, (intmax_t)norm_first_zone);
printf(_("Zonesize=%d\n"), MINIX_BLOCK_SIZE << get_zone_size());
printf(_("Maxsize=%zu\n"), get_max_size());
if (fs_version < 3)
printf(_("Filesystem state=%d\n"), Super.s_state);
printf(_("namelen=%zd\n\n"), namelen);
}
}
static struct minix_inode *
get_inode(unsigned int nr) {
struct minix_inode *inode;
if (!nr || nr > get_ninodes())
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 > get_ninodes())
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 block;
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 block;
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[MINIX_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 < (MINIX_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[MINIX_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 < MINIX_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[MINIX_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 < (MINIX_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[MINIX_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 < MINIX_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[MINIX_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 < MINIX_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 > get_ninodes())
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 > get_ninodes())
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[MINIX_BLOCK_SIZE + 2];
struct minix_inode *inode;
unsigned int ino;
char *name;
int block;
block = map_block(dir, offset / MINIX_BLOCK_SIZE);
read_block(block, blk);
name = blk + (offset % MINIX_BLOCK_SIZE) + 2;
ino = *(unsigned short *)(name - 2);
if (ino > get_ninodes()) {
get_current_name();
printf(_("The directory '%s' contains a bad inode number "
"for file '%.*s'."), current_name, (int)namelen, name);
if (ask(_(" Remove"), 1)) {
*(unsigned short *)(name - 2) = 0;
write_block(block, blk);
}
ino = 0;
}
if (name_depth < MAX_DEPTH)
xstrncpy(name_list[name_depth], name, namelen);
else
return;
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);
errors_uncorrected = 1;
} else
return;
}
if (!inode)
return;
if (name_depth < MAX_DEPTH)
xstrncpy(name_list[name_depth], name, namelen);
else
return;
name_depth++;
if (list) {
if (verbose)
printf("%6d %07o %3d ", ino,
inode->i_mode, inode->i_nlinks);
get_current_name();
printf("%s", 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;
}
static void
check_file2(struct minix2_inode *dir, unsigned int offset) {
static char blk[MINIX_BLOCK_SIZE + 4];
struct minix2_inode *inode;
ino_t ino;
char *name;
int block;
const int version_offset = fs_version == 3 ? 4 : 2;
block = map_block2(dir, offset / MINIX_BLOCK_SIZE);
read_block(block, blk);
name = blk + (offset % MINIX_BLOCK_SIZE) + version_offset;
ino = version_offset == 4 ? *(uint32_t *)(name - version_offset)
: *(uint16_t *)(name - version_offset);
if (ino > get_ninodes()) {
get_current_name();
printf(_("The directory '%s' contains a bad inode number "
"for file '%.*s'."), current_name, (int)namelen, name);
if (ask(_(" Remove"), 1)) {
memset(name - version_offset, 0, version_offset);
write_block(block, blk);
}
ino = 0;
}
if (name_depth < MAX_DEPTH)
xstrncpy(name_list[name_depth], name, namelen);
else
return;
name_depth++;
inode = get_inode2(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);
errors_uncorrected = 1;
} else
return;
}
if (!inode)
return;
name_depth++;
if (list) {
if (verbose)
printf("%6ju %07o %3d ", (uintmax_t)ino, inode->i_mode,
inode->i_nlinks);
get_current_name();
printf("%s", 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;
}
static void
recursive_check(unsigned int ino) {
struct minix_inode *dir;
off_t offset;
dir = Inode + ino;
if (!S_ISDIR(dir->i_mode))
die(_("internal error"));
if (dir->i_size < 2 * dirsize) {
get_current_name();
printf(_("%s: bad directory: size < 32"), current_name);
errors_uncorrected = 1;
}
for (offset = 0; offset < dir->i_size; offset += dirsize)
check_file(dir, offset);
}
static void
recursive_check2(unsigned int ino) {
struct minix2_inode *dir;
off_t offset;
dir = Inode2 + ino;
if (!S_ISDIR(dir->i_mode))
die(_("internal error"));
if (dir->i_size < 2 * dirsize) {
get_current_name();
printf(_("%s: bad directory: size < 32"), current_name);
errors_uncorrected = 1;
}
for (offset = 0; offset < dir->i_size; offset += dirsize)
check_file2(dir, offset);
}
static int
bad_zone(int i) {
char buffer[1024];
if (MINIX_BLOCK_SIZE * i != lseek(device_fd, MINIX_BLOCK_SIZE * i, SEEK_SET))
die(_("seek failed in bad_zone"));
return (MINIX_BLOCK_SIZE != read(device_fd, buffer, MINIX_BLOCK_SIZE));
}
static void
check_counts(void) {
unsigned long i;
for (i = 1; i <= get_ninodes(); i++) {
if (!inode_in_use(i) && Inode[i].i_mode && warn_mode) {
printf(_("Inode %lu 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 %lu not used, marked used in the bitmap."), i);
if (ask(_("Clear"), 1))
unmark_inode(i);
continue;
}
if (!inode_in_use(i)) {
printf(_("Inode %lu used, marked unused in the bitmap."), i);
if (ask(_("Set"), 1))
mark_inode(i);
}
if (Inode[i].i_nlinks != inode_count[i]) {
printf(_("Inode %lu (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 = get_first_zone(); i < get_nzones(); i++) {
if (zone_in_use(i) == zone_count[i])
continue;
if (!zone_count[i]) {
if (bad_zone(i))
continue;
printf(_("Zone %lu: marked in use, no file uses it."),
i);
if (ask(_("Unmark"), 1))
unmark_zone(i);
continue;
}
if (zone_in_use(i))
printf(_("Zone %lu: in use, counted=%d\n"),
i, zone_count[i]);
else
printf(_("Zone %lu: not in use, counted=%d\n"),
i, zone_count[i]);
}
}
static void
check_counts2(void) {
unsigned long i;
for (i = 1; i <= get_ninodes(); i++) {
if (!inode_in_use(i) && Inode2[i].i_mode && warn_mode) {
printf(_("Inode %lu 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 %lu not used, marked used in the bitmap."), i);
if (ask(_("Clear"), 1))
unmark_inode(i);
continue;
}
if (!inode_in_use(i)) {
printf(_("Inode %lu used, marked unused in the bitmap."), i);
if (ask(_("Set"), 1))
mark_inode(i);
}
if (Inode2[i].i_nlinks != inode_count[i]) {
printf(_("Inode %lu (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 = get_first_zone(); i < get_nzones(); i++) {
if (zone_in_use(i) == zone_count[i])
continue;
if (!zone_count[i]) {
if (bad_zone(i))
continue;
printf(_("Zone %lu: marked in use, no file uses it."),
i);
if (ask(_("Unmark"), 1))
unmark_zone(i);
continue;
}
if (zone_in_use(i))
printf(_("Zone %lu: in use, counted=%d\n"),
i, zone_count[i]);
else
printf(_("Zone %lu: not in use, counted=%d\n"),
i, zone_count[i]);
}
}
static void
check(void) {
memset(inode_count, 0, (get_ninodes() + 1) * sizeof(*inode_count));
memset(zone_count, 0, get_nzones() * sizeof(*zone_count));
check_zones(ROOT_INO);
recursive_check(ROOT_INO);
check_counts();
}
static void
check2(void) {
memset(inode_count, 0, (get_ninodes() + 1) * sizeof(*inode_count));
memset(zone_count, 0, get_nzones() * sizeof(*zone_count));
check_zones2(ROOT_INO);
recursive_check2(ROOT_INO);
check_counts2();
}
int
main(int argc, char **argv) {
struct termios tmp;
int count;
int retcode = FSCK_EX_OK;
int i;
static const struct option longopts[] = {
{"list", no_argument, NULL, 'l'},
{"auto", no_argument, NULL, 'a'},
{"repair", no_argument, NULL, 'r'},
{"verbose", no_argument, NULL, 'v'},
{"super", no_argument, NULL, 's'},
{"uncleared", no_argument, NULL, 'm'},
{"force", no_argument, NULL, 'f'},
{"version", no_argument, NULL, 'V'},
{"help", no_argument, NULL, 'h'},
{NULL, 0, NULL, 0}
};
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
if (INODE_SIZE * MINIX_INODES_PER_BLOCK != MINIX_BLOCK_SIZE)
die(_("bad inode size"));
if (INODE2_SIZE * MINIX2_INODES_PER_BLOCK != MINIX_BLOCK_SIZE)
die(_("bad v2 inode size"));
while ((i = getopt_long(argc, argv, "larvsmfVh", longopts, NULL)) != -1)
switch (i) {
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;
case 'V':
printf(UTIL_LINUX_VERSION);
return FSCK_EX_OK;
case 'h':
usage(stdout);
default:
usage(stderr);
}
argc -= optind;
argv += optind;
if (0 < argc) {
device_name = argv[0];
} else
usage(stderr);
check_mount(); /* trying to check a mounted filesystem? */
if (repair && !automatic) {
if (!isatty(STDIN_FILENO) || !isatty(STDOUT_FILENO))
die(_("need terminal for interactive repairs"));
}
device_fd = open(device_name, repair ? O_RDWR : O_RDONLY);
if (device_fd < 0)
die(_("cannot open %s: %s"), device_name, strerror(errno));
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. */
if (fs_version < 3 && !(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();
/* Restore the terminal state on fatal signals. We don't do this for
* SIGALRM, SIGUSR1 or SIGUSR2. */
signal(SIGINT, fatalsig);
signal(SIGQUIT, fatalsig);
signal(SIGTERM, fatalsig);
if (repair && !automatic) {
tcgetattr(STDIN_FILENO, &termios);
tmp = termios;
tmp.c_lflag &= ~(ICANON | ECHO);
tcsetattr(STDIN_FILENO, TCSANOW, &tmp);
termios_set = 1;
}
if (fs_version == 2 || fs_version == 3) {
check_root2();
check2();
} else {
check_root();
check();
}
if (verbose) {
unsigned long inode, free;
for (inode = 1, free = 0; inode <= get_ninodes(); inode++)
if (!inode_in_use(inode))
free++;
printf(_("\n%6ld inodes used (%ld%%)\n"),
(get_ninodes() - free),
100 * (get_ninodes() - free) / get_ninodes());
for (inode = get_first_zone(), free = 0; inode < get_nzones(); inode++)
if (!zone_in_use(inode))
free++;
printf(_("%6ld zones used (%ld%%)\n"), (get_nzones() - free),
100 * (get_nzones() - free) / get_nzones());
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(STDIN_FILENO, TCSANOW, &termios);
if (close_fd(device_fd) != 0)
err(FSCK_EX_ERROR, _("write failed"));
if (changed)
retcode += 3;
if (errors_uncorrected)
retcode += 4;
return retcode;
}