busybox/util-linux/fsck_minix.c

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/* vi: set sw=4 ts=4: */
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/*
* fsck.c - a file system consistency checker for Linux.
*
* (C) 1991, 1992 Linus Torvalds.
*
* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
/*
* 09.11.91 - made the first rudimentary functions
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*
* 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
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* 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
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* kernel bug ate my enhanced fsck in february.
*
* 28.02.93 - added support for different directory entry sizes..
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*
* Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with
* superblock information
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*
* 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.
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*
* 30.10.94 - added support for v2 filesystem
* (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
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*
* 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)
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*
* 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such
* for modern libcs (janl@math.uio.no, Nicolai Langfeldt)
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*
* 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk
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* (Russell King). He made them for ARM. It would seem
* that the ARM is powerful enough to do this in C whereas
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* i386 and m64k must use assembly to get it fast >:-)
* This should make minix fsck system-independent.
* (janl@math.uio.no, Nicolai Langfeldt)
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*
* 04.11.96 - Added minor fixes from Andreas Schwab to avoid compiler
* warnings. Added mc68k bitops from
* Joerg Dorchain <dorchain@mpi-sb.mpg.de>.
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*
* 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by
* Andreas Schwab.
*
* 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org>
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* - added Native Language Support
*
*
* I've had no time to add comments - hopefully the function names
* are comments enough. As with all file system checkers, this assumes
* the file system is quiescent - don't use it on a mounted device
* unless you can be sure nobody is writing to it (and remember that the
* kernel can write to it when it searches for files).
*
* Usage: fsck [-larvsm] device
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* -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 superblock info
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* -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 :-).
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*/
//config:config FSCK_MINIX
//config: bool "fsck.minix (13 kb)"
//config: default y
//config: help
//config: The minix filesystem is a nice, small, compact, read-write filesystem
//config: with little overhead. It is not a journaling filesystem however and
//config: can experience corruption if it is not properly unmounted or if the
//config: power goes off in the middle of a write. This utility allows you to
//config: check for and attempt to repair any corruption that occurs to a minix
//config: filesystem.
//applet:IF_FSCK_MINIX(APPLET_ODDNAME(fsck.minix, fsck_minix, BB_DIR_SBIN, BB_SUID_DROP, fsck_minix))
//kbuild:lib-$(CONFIG_FSCK_MINIX) += fsck_minix.o
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//usage:#define fsck_minix_trivial_usage
//usage: "[-larvsmf] BLOCKDEV"
//usage:#define fsck_minix_full_usage "\n\n"
//usage: "Check MINIX filesystem\n"
//usage: "\n -l List all filenames"
//usage: "\n -r Perform interactive repairs"
//usage: "\n -a Perform automatic repairs"
//usage: "\n -v Verbose"
//usage: "\n -s Output superblock information"
//usage: "\n -m Show \"mode not cleared\" warnings"
//usage: "\n -f Force file system check"
#include <mntent.h>
#include "libbb.h"
#include "minix.h"
#ifndef BLKGETSIZE
#define BLKGETSIZE _IO(0x12,96) /* return device size */
#endif
struct BUG_bad_inode_size {
char BUG_bad_inode1_size[(INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
#if ENABLE_FEATURE_MINIX2
char BUG_bad_inode2_size[(INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
#endif
};
enum {
#ifdef UNUSED
MINIX1_LINK_MAX = 250,
MINIX2_LINK_MAX = 65530,
MINIX_I_MAP_SLOTS = 8,
MINIX_Z_MAP_SLOTS = 64,
MINIX_V1 = 0x0001, /* original minix fs */
MINIX_V2 = 0x0002, /* minix V2 fs */
#endif
MINIX_NAME_MAX = 255, /* # chars in a file name */
};
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#if !ENABLE_FEATURE_MINIX2
enum { version2 = 0 };
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#endif
enum { MAX_DEPTH = 32 };
enum { dev_fd = 3 };
struct globals {
#if ENABLE_FEATURE_MINIX2
smallint version2;
#endif
smallint changed; /* is filesystem modified? */
smallint errors_uncorrected; /* flag if some error was not corrected */
smallint termios_set;
smallint dirsize;
smallint namelen;
const char *device_name;
int directory, regular, blockdev, chardev, links, symlinks, total;
char *inode_buffer;
char *inode_map;
char *zone_map;
unsigned char *inode_count;
unsigned char *zone_count;
/* File-name data */
int name_depth;
char *name_component[MAX_DEPTH+1];
/* Bigger stuff */
struct termios sv_termios;
union {
char superblock_buffer[BLOCK_SIZE];
struct minix_superblock Super;
} u;
char add_zone_ind_blk[BLOCK_SIZE];
char add_zone_dind_blk[BLOCK_SIZE];
IF_FEATURE_MINIX2(char add_zone_tind_blk[BLOCK_SIZE];)
char check_file_blk[BLOCK_SIZE];
/* File-name data */
char current_name[MAX_DEPTH * MINIX_NAME_MAX];
};
#define G (*ptr_to_globals)
#if ENABLE_FEATURE_MINIX2
#define version2 (G.version2 )
#endif
#define changed (G.changed )
#define errors_uncorrected (G.errors_uncorrected )
#define termios_set (G.termios_set )
#define dirsize (G.dirsize )
#define namelen (G.namelen )
#define device_name (G.device_name )
#define directory (G.directory )
#define regular (G.regular )
#define blockdev (G.blockdev )
#define chardev (G.chardev )
#define links (G.links )
#define symlinks (G.symlinks )
#define total (G.total )
#define inode_buffer (G.inode_buffer )
#define inode_map (G.inode_map )
#define zone_map (G.zone_map )
#define inode_count (G.inode_count )
#define zone_count (G.zone_count )
#define name_depth (G.name_depth )
#define name_component (G.name_component )
#define sv_termios (G.sv_termios )
#define superblock_buffer (G.u.superblock_buffer)
#define add_zone_ind_blk (G.add_zone_ind_blk )
#define add_zone_dind_blk (G.add_zone_dind_blk )
#define add_zone_tind_blk (G.add_zone_tind_blk )
#define check_file_blk (G.check_file_blk )
#define current_name (G.current_name )
#define INIT_G() do { \
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
dirsize = 16; \
namelen = 14; \
current_name[0] = '/'; \
/*current_name[1] = '\0';*/ \
name_component[0] = &current_name[0]; \
} while (0)
#define OPTION_STR "larvsmf"
enum {
OPT_l = (1 << 0),
OPT_a = (1 << 1),
OPT_r = (1 << 2),
OPT_v = (1 << 3),
OPT_s = (1 << 4),
OPT_w = (1 << 5),
OPT_f = (1 << 6),
};
#define OPT_list (option_mask32 & OPT_l)
#define OPT_automatic (option_mask32 & OPT_a)
#define OPT_repair (option_mask32 & OPT_r)
#define OPT_verbose (option_mask32 & OPT_v)
#define OPT_show (option_mask32 & OPT_s)
#define OPT_warn_mode (option_mask32 & OPT_w)
#define OPT_force (option_mask32 & OPT_f)
/* non-automatic repairs requested? */
#define OPT_manual ((option_mask32 & (OPT_a|OPT_r)) == OPT_r)
#define Inode1 (((struct minix1_inode *) inode_buffer)-1)
#define Inode2 (((struct minix2_inode *) inode_buffer)-1)
#define Super (G.u.Super)
#if ENABLE_FEATURE_MINIX2
# define ZONES ((unsigned)(version2 ? Super.s_zones : Super.s_nzones))
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#else
# define ZONES ((unsigned)(Super.s_nzones))
#endif
#define INODES ((unsigned)Super.s_ninodes)
#define IMAPS ((unsigned)Super.s_imap_blocks)
#define ZMAPS ((unsigned)Super.s_zmap_blocks)
#define FIRSTZONE ((unsigned)Super.s_firstdatazone)
#define ZONESIZE ((unsigned)Super.s_log_zone_size)
#define MAXSIZE ((unsigned)Super.s_max_size)
#define MAGIC (Super.s_magic)
/* gcc likes this more (code is smaller) than macro variant */
static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
{
return (size + n-1) / n;
}
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#if !ENABLE_FEATURE_MINIX2
#define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK)
#else
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#define INODE_BLOCKS div_roundup(INODES, \
(version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK))
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#endif
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#define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
#define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS)
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/* Before you ask "where they come from?": */
/* setbit/clrbit are supplied by sys/param.h */
static int minix_bit(const char *a, unsigned i)
{
return (a[i >> 3] & (1<<(i & 7)));
}
static void minix_setbit(char *a, unsigned i)
{
setbit(a, i);
changed = 1;
}
static void minix_clrbit(char *a, unsigned i)
{
clrbit(a, i);
changed = 1;
}
/* Note: do not assume 0/1, it is 0/nonzero */
#define zone_in_use(x) (minix_bit(zone_map,(x)-FIRSTZONE+1))
#define inode_in_use(x) (minix_bit(inode_map,(x)))
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#define mark_inode(x) (minix_setbit(inode_map,(x)))
#define unmark_inode(x) (minix_clrbit(inode_map,(x)))
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#define mark_zone(x) (minix_setbit(zone_map,(x)-FIRSTZONE+1))
#define unmark_zone(x) (minix_clrbit(zone_map,(x)-FIRSTZONE+1))
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static void recursive_check(unsigned ino);
#if ENABLE_FEATURE_MINIX2
static void recursive_check2(unsigned ino);
#endif
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static void die(const char *str) NORETURN;
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static void die(const char *str)
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{
if (termios_set)
tcsetattr_stdin_TCSANOW(&sv_termios);
libbb: reduce the overhead of single parameter bb_error_msg() calls Back in 2007, commit 0c97c9d43707 ("'simple' error message functions by Loic Grenie") introduced bb_simple_perror_msg() to allow for a lower overhead call to bb_perror_msg() when only a string was being printed with no parameters. This saves space for some CPU architectures because it avoids the overhead of a call to a variadic function. However there has never been a simple version of bb_error_msg(), and since 2007 many new calls to bb_perror_msg() have been added that only take a single parameter and so could have been using bb_simple_perror_message(). This changeset introduces 'simple' versions of bb_info_msg(), bb_error_msg(), bb_error_msg_and_die(), bb_herror_msg() and bb_herror_msg_and_die(), and replaces all calls that only take a single parameter, or use something like ("%s", arg), with calls to the corresponding 'simple' version. Since it is likely that single parameter calls to the variadic functions may be accidentally reintroduced in the future a new debugging config option WARN_SIMPLE_MSG has been introduced. This uses some macro magic which will cause any such calls to generate a warning, but this is turned off by default to avoid use of the unpleasant macros in normal circumstances. This is a large changeset due to the number of calls that have been replaced. The only files that contain changes other than simple substitution of function calls are libbb.h, libbb/herror_msg.c, libbb/verror_msg.c and libbb/xfuncs_printf.c. In miscutils/devfsd.c, networking/udhcp/common.h and util-linux/mdev.c additonal macros have been added for logging so that single parameter and multiple parameter logging variants exist. The amount of space saved varies considerably by architecture, and was found to be as follows (for 'defconfig' using GCC 7.4): Arm: -92 bytes MIPS: -52 bytes PPC: -1836 bytes x86_64: -938 bytes Note that for the MIPS architecture only an exception had to be made disabling the 'simple' calls for 'udhcp' (in networking/udhcp/common.h) because it made these files larger on MIPS. Signed-off-by: James Byrne <james.byrne@origamienergy.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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bb_simple_error_msg_and_die(str);
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}
static void push_filename(const char *name)
{
// /dir/dir/dir/file
// ^ ^ ^
// [0] [1] [2] <-name_component[i]
if (name_depth < MAX_DEPTH) {
int len;
char *p = name_component[name_depth];
*p++ = '/';
len = sprintf(p, "%.*s", namelen, name);
name_component[name_depth + 1] = p + len;
}
name_depth++;
}
static void pop_filename(void)
{
name_depth--;
if (name_depth < MAX_DEPTH) {
*name_component[name_depth] = '\0';
if (!name_depth) {
current_name[0] = '/';
current_name[1] = '\0';
}
}
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}
static int ask(const char *string, int def)
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{
int c;
if (!OPT_repair) {
bb_putchar('\n');
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errors_uncorrected = 1;
return 0;
}
if (OPT_automatic) {
bb_putchar('\n');
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if (!def)
errors_uncorrected = 1;
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return def;
}
printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
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for (;;) {
fflush_all();
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c = getchar();
if (c == EOF) {
if (!def)
errors_uncorrected = 1;
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return def;
}
if (c == '\n')
break;
c |= 0x20; /* tolower */
if (c == 'y') {
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def = 1;
break;
}
if (c == 'n') {
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def = 0;
break;
}
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}
if (def)
puts("y");
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else {
puts("n");
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errors_uncorrected = 1;
}
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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)
{
if (find_mount_point(device_name, 0)) {
int cont;
#if ENABLE_FEATURE_MTAB_SUPPORT
/*
* If the root is mounted read-only, then /etc/mtab is
* probably not correct; so we won't issue a warning based on
* it.
*/
int fd = open(bb_path_mtab_file, O_RDWR);
if (fd < 0 && errno == EROFS)
return;
close(fd);
#endif
printf("%s is mounted. ", device_name);
cont = 0;
if (isatty(0) && isatty(1))
cont = ask("Do you really want to continue", 0);
if (!cont) {
puts("Check aborted");
exit(EXIT_SUCCESS);
}
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}
}
/*
* check_zone_nr checks to see that *nr is a valid zone nr. If it
* isn't, it will possibly be repaired. Check_zone_nr sets *corrected
* if an error was corrected, and returns the zone (0 for no zone
* or a bad zone-number).
*/
static int check_zone_nr2(uint32_t *nr, smallint *corrected)
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{
const char *msg;
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if (!*nr)
return 0;
if (*nr < FIRSTZONE)
msg = "< FIRSTZONE";
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else if (*nr >= ZONES)
msg = ">= ZONES";
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else
return *nr;
printf("Zone nr %s in file '%s'. ", msg, current_name);
if (ask("Remove block", 1)) {
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*nr = 0;
*corrected = 1;
}
return 0;
}
static int check_zone_nr(uint16_t *nr, smallint *corrected)
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{
uint32_t nr32 = *nr;
int r = check_zone_nr2(&nr32, corrected);
*nr = (uint16_t)nr32;
return r;
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}
/*
* read-block reads block nr into the buffer at addr.
*/
static void read_block(unsigned nr, void *addr)
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{
if (!nr) {
memset(addr, 0, BLOCK_SIZE);
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return;
}
xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
if (BLOCK_SIZE != full_read(dev_fd, addr, BLOCK_SIZE)) {
printf("%s: bad block %u in file '%s'\n",
bb_msg_read_error, nr, current_name);
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errors_uncorrected = 1;
memset(addr, 0, BLOCK_SIZE);
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}
}
/*
* write_block writes block nr to disk.
*/
static void write_block(unsigned nr, void *addr)
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{
if (!nr)
return;
if (nr < FIRSTZONE || nr >= ZONES) {
puts("Internal error: trying to write bad block\n"
"Write request ignored");
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errors_uncorrected = 1;
return;
}
xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
if (BLOCK_SIZE != full_write(dev_fd, addr, BLOCK_SIZE)) {
printf("%s: bad block %u in file '%s'\n",
bb_msg_write_error, nr, current_name);
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errors_uncorrected = 1;
}
}
/*
* map_block calculates the absolute block nr of a block in a file.
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* It sets 'changed' if the inode has needed changing, and re-writes
* any indirect blocks with errors.
*/
static int map_block(struct minix1_inode *inode, unsigned blknr)
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{
uint16_t ind[BLOCK_SIZE >> 1];
int block, result;
smallint blk_chg;
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if (blknr < 7)
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return check_zone_nr(inode->i_zone + blknr, &changed);
blknr -= 7;
if (blknr < 512) {
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block = check_zone_nr(inode->i_zone + 7, &changed);
goto common;
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}
blknr -= 512;
block = check_zone_nr(inode->i_zone + 8, &changed);
read_block(block, ind); /* double indirect */
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blk_chg = 0;
result = check_zone_nr(&ind[blknr / 512], &blk_chg);
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if (blk_chg)
write_block(block, ind);
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block = result;
common:
read_block(block, ind);
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blk_chg = 0;
result = check_zone_nr(&ind[blknr % 512], &blk_chg);
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if (blk_chg)
write_block(block, ind);
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return result;
}
#if ENABLE_FEATURE_MINIX2
static int map_block2(struct minix2_inode *inode, unsigned blknr)
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{
uint32_t ind[BLOCK_SIZE >> 2];
int block, result;
smallint blk_chg;
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if (blknr < 7)
return check_zone_nr2(inode->i_zone + blknr, &changed);
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blknr -= 7;
if (blknr < 256) {
block = check_zone_nr2(inode->i_zone + 7, &changed);
goto common2;
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}
blknr -= 256;
if (blknr < 256 * 256) {
block = check_zone_nr2(inode->i_zone + 8, &changed);
goto common1;
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}
blknr -= 256 * 256;
block = check_zone_nr2(inode->i_zone + 9, &changed);
read_block(block, ind); /* triple indirect */
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blk_chg = 0;
result = check_zone_nr2(&ind[blknr / (256 * 256)], &blk_chg);
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if (blk_chg)
write_block(block, ind);
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block = result;
common1:
read_block(block, ind); /* double indirect */
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blk_chg = 0;
result = check_zone_nr2(&ind[(blknr / 256) % 256], &blk_chg);
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if (blk_chg)
write_block(block, ind);
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block = result;
common2:
read_block(block, ind);
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blk_chg = 0;
result = check_zone_nr2(&ind[blknr % 256], &blk_chg);
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if (blk_chg)
write_block(block, ind);
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return result;
}
#endif
static void write_superblock(void)
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{
/*
* 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.
*/
2007-01-03 06:11:53 +05:30
Super.s_state |= MINIX_VALID_FS | MINIX_ERROR_FS;
if (!errors_uncorrected)
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Super.s_state &= ~MINIX_ERROR_FS;
xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
if (BLOCK_SIZE != full_write(dev_fd, superblock_buffer, BLOCK_SIZE))
die("can't write superblock");
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}
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static void write_tables(void)
1999-10-20 01:53:03 +05:30
{
write_superblock();
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if (IMAPS * BLOCK_SIZE != write(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
die("can't write inode map");
if (ZMAPS * BLOCK_SIZE != write(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
die("can't write zone map");
if (INODE_BUFFER_SIZE != write(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
die("can't write inodes");
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}
static void get_dirsize(void)
1999-10-20 01:53:03 +05:30
{
int block;
char blk[BLOCK_SIZE];
int size;
#if ENABLE_FEATURE_MINIX2
1999-10-20 01:53:03 +05:30
if (version2)
block = Inode2[MINIX_ROOT_INO].i_zone[0];
1999-10-20 01:53:03 +05:30
else
#endif
block = Inode1[MINIX_ROOT_INO].i_zone[0];
read_block(block, blk);
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for (size = 16; size < BLOCK_SIZE; size <<= 1) {
if (strcmp(blk + size + 2, "..") == 0) {
1999-10-20 01:53:03 +05:30
dirsize = size;
namelen = size - 2;
return;
}
}
/* use defaults */
}
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static void read_superblock(void)
1999-10-20 01:53:03 +05:30
{
xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
if (BLOCK_SIZE != full_read(dev_fd, superblock_buffer, BLOCK_SIZE))
die("can't read superblock");
/* already initialized to:
namelen = 14;
dirsize = 16;
version2 = 0;
*/
if (MAGIC == MINIX1_SUPER_MAGIC) {
} else if (MAGIC == MINIX1_SUPER_MAGIC2) {
1999-10-20 01:53:03 +05:30
namelen = 30;
dirsize = 32;
#if ENABLE_FEATURE_MINIX2
1999-10-20 01:53:03 +05:30
} else if (MAGIC == MINIX2_SUPER_MAGIC) {
version2 = 1;
} else if (MAGIC == MINIX2_SUPER_MAGIC2) {
namelen = 30;
dirsize = 32;
version2 = 1;
#endif
} else
die("bad magic number in superblock");
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if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
die("only 1k blocks/zones supported");
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if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
die("bad s_imap_blocks field in superblock");
1999-10-20 01:53:03 +05:30
if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
die("bad s_zmap_blocks field in superblock");
1999-10-20 01:53:03 +05:30
}
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static void read_tables(void)
1999-10-20 01:53:03 +05:30
{
2006-06-13 20:42:14 +05:30
inode_map = xzalloc(IMAPS * BLOCK_SIZE);
zone_map = xzalloc(ZMAPS * BLOCK_SIZE);
inode_buffer = xmalloc(INODE_BUFFER_SIZE);
inode_count = xmalloc(INODES + 1);
zone_count = xmalloc(ZONES);
if (IMAPS * BLOCK_SIZE != read(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
die("can't read inode map");
if (ZMAPS * BLOCK_SIZE != read(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
die("can't read zone map");
if (INODE_BUFFER_SIZE != read(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
die("can't read inodes");
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if (NORM_FIRSTZONE != FIRSTZONE) {
puts("warning: firstzone!=norm_firstzone");
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errors_uncorrected = 1;
}
get_dirsize();
if (OPT_show) {
printf("%u inodes\n"
"%u blocks\n"
"Firstdatazone=%u (%u)\n"
"Zonesize=%u\n"
"Maxsize=%u\n"
"Filesystem state=%u\n"
"namelen=%u\n\n",
INODES,
ZONES,
FIRSTZONE, NORM_FIRSTZONE,
BLOCK_SIZE << ZONESIZE,
MAXSIZE,
Super.s_state,
namelen);
1999-10-20 01:53:03 +05:30
}
}
static void get_inode_common(unsigned nr, uint16_t i_mode)
1999-10-20 01:53:03 +05:30
{
total++;
if (!inode_count[nr]) {
if (!inode_in_use(nr)) {
printf("Inode %u is marked as 'unused', but it is used "
"for file '%s'\n", nr, current_name);
if (OPT_repair) {
if (ask("Mark as 'in use'", 1))
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mark_inode(nr);
else
errors_uncorrected = 1;
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}
}
if (S_ISDIR(i_mode))
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directory++;
else if (S_ISREG(i_mode))
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regular++;
else if (S_ISCHR(i_mode))
1999-10-20 01:53:03 +05:30
chardev++;
else if (S_ISBLK(i_mode))
1999-10-20 01:53:03 +05:30
blockdev++;
else if (S_ISLNK(i_mode))
1999-10-20 01:53:03 +05:30
symlinks++;
else if (S_ISSOCK(i_mode));
else if (S_ISFIFO(i_mode));
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else {
printf("%s has mode %05o\n", current_name, i_mode);
}
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} else
links++;
if (!++inode_count[nr]) {
puts("Warning: inode count too big");
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inode_count[nr]--;
errors_uncorrected = 1;
}
}
static struct minix1_inode *get_inode(unsigned nr)
{
struct minix1_inode *inode;
if (!nr || nr > INODES)
return NULL;
inode = Inode1 + nr;
get_inode_common(nr, inode->i_mode);
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return inode;
}
#if ENABLE_FEATURE_MINIX2
static struct minix2_inode *get_inode2(unsigned nr)
1999-10-20 01:53:03 +05:30
{
struct minix2_inode *inode;
if (!nr || nr > INODES)
return NULL;
inode = Inode2 + nr;
get_inode_common(nr, inode->i_mode);
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return inode;
}
#endif
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static void check_root(void)
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{
struct minix1_inode *inode = Inode1 + MINIX_ROOT_INO;
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if (!inode || !S_ISDIR(inode->i_mode))
die("root inode isn't a directory");
1999-10-20 01:53:03 +05:30
}
#if ENABLE_FEATURE_MINIX2
static void check_root2(void)
1999-10-20 01:53:03 +05:30
{
struct minix2_inode *inode = Inode2 + MINIX_ROOT_INO;
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if (!inode || !S_ISDIR(inode->i_mode))
die("root inode isn't a directory");
1999-10-20 01:53:03 +05:30
}
#else
void check_root2(void);
1999-10-20 01:53:03 +05:30
#endif
static int add_zone_common(int block, smallint *corrected)
1999-10-20 01:53:03 +05:30
{
if (!block)
return 0;
if (zone_count[block]) {
printf("Already used block is reused in file '%s'. ",
current_name);
if (ask("Clear", 1)) {
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block = 0;
*corrected = 1;
return -1; /* "please zero out *znr" */
1999-10-20 01:53:03 +05:30
}
}
if (!zone_in_use(block)) {
printf("Block %d in file '%s' is marked as 'unused'. ",
block, current_name);
if (ask("Correct", 1))
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mark_zone(block);
}
if (!++zone_count[block])
zone_count[block]--;
return block;
}
static int add_zone(uint16_t *znr, smallint *corrected)
{
int block;
block = check_zone_nr(znr, corrected);
block = add_zone_common(block, corrected);
if (block == -1) {
*znr = 0;
block = 0;
}
return block;
}
#if ENABLE_FEATURE_MINIX2
static int add_zone2(uint32_t *znr, smallint *corrected)
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{
int block;
block = check_zone_nr2(znr, corrected);
block = add_zone_common(block, corrected);
if (block == -1) {
*znr = 0;
block = 0;
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}
return block;
}
#endif
static void add_zone_ind(uint16_t *znr, smallint *corrected)
1999-10-20 01:53:03 +05:30
{
int i;
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int block;
smallint chg_blk = 0;
1999-10-20 01:53:03 +05:30
block = add_zone(znr, corrected);
if (!block)
return;
read_block(block, add_zone_ind_blk);
for (i = 0; i < (BLOCK_SIZE >> 1); i++)
add_zone(i + (uint16_t *) add_zone_ind_blk, &chg_blk);
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if (chg_blk)
write_block(block, add_zone_ind_blk);
1999-10-20 01:53:03 +05:30
}
#if ENABLE_FEATURE_MINIX2
static void add_zone_ind2(uint32_t *znr, smallint *corrected)
1999-10-20 01:53:03 +05:30
{
int i;
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int block;
smallint chg_blk = 0;
1999-10-20 01:53:03 +05:30
block = add_zone2(znr, corrected);
1999-10-20 01:53:03 +05:30
if (!block)
return;
read_block(block, add_zone_ind_blk);
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for (i = 0; i < BLOCK_SIZE >> 2; i++)
add_zone2(i + (uint32_t *) add_zone_ind_blk, &chg_blk);
1999-10-20 01:53:03 +05:30
if (chg_blk)
write_block(block, add_zone_ind_blk);
1999-10-20 01:53:03 +05:30
}
#endif
static void add_zone_dind(uint16_t *znr, smallint *corrected)
1999-10-20 01:53:03 +05:30
{
int i;
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int block;
smallint chg_blk = 0;
1999-10-20 01:53:03 +05:30
block = add_zone(znr, corrected);
if (!block)
return;
read_block(block, add_zone_dind_blk);
for (i = 0; i < (BLOCK_SIZE >> 1); i++)
add_zone_ind(i + (uint16_t *) add_zone_dind_blk, &chg_blk);
if (chg_blk)
write_block(block, add_zone_dind_blk);
1999-10-20 01:53:03 +05:30
}
#if ENABLE_FEATURE_MINIX2
static void add_zone_dind2(uint32_t *znr, smallint *corrected)
1999-10-20 01:53:03 +05:30
{
int i;
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int block;
smallint chg_blk = 0;
1999-10-20 01:53:03 +05:30
block = add_zone2(znr, corrected);
1999-10-20 01:53:03 +05:30
if (!block)
return;
read_block(block, add_zone_dind_blk);
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for (i = 0; i < BLOCK_SIZE >> 2; i++)
add_zone_ind2(i + (uint32_t *) add_zone_dind_blk, &chg_blk);
if (chg_blk)
write_block(block, add_zone_dind_blk);
1999-10-20 01:53:03 +05:30
}
static void add_zone_tind2(uint32_t *znr, smallint *corrected)
1999-10-20 01:53:03 +05:30
{
int i;
1999-10-20 01:53:03 +05:30
int block;
smallint chg_blk = 0;
1999-10-20 01:53:03 +05:30
block = add_zone2(znr, corrected);
1999-10-20 01:53:03 +05:30
if (!block)
return;
read_block(block, add_zone_tind_blk);
1999-10-20 01:53:03 +05:30
for (i = 0; i < BLOCK_SIZE >> 2; i++)
add_zone_dind2(i + (uint32_t *) add_zone_tind_blk, &chg_blk);
if (chg_blk)
write_block(block, add_zone_tind_blk);
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}
#endif
static void check_zones(unsigned i)
1999-10-20 01:53:03 +05:30
{
struct minix1_inode *inode;
1999-10-20 01:53:03 +05:30
if (!i || i > INODES)
return;
if (inode_count[i] > 1) /* have we counted this file already? */
1999-10-20 01:53:03 +05:30
return;
inode = Inode1 + i;
if (!S_ISDIR(inode->i_mode)
&& !S_ISREG(inode->i_mode)
&& !S_ISLNK(inode->i_mode)
) {
return;
}
for (i = 0; i < 7; i++)
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add_zone(i + inode->i_zone, &changed);
add_zone_ind(7 + inode->i_zone, &changed);
add_zone_dind(8 + inode->i_zone, &changed);
}
#if ENABLE_FEATURE_MINIX2
static void check_zones2(unsigned i)
1999-10-20 01:53:03 +05:30
{
struct minix2_inode *inode;
if (!i || i > INODES)
return;
if (inode_count[i] > 1) /* have we counted this file already? */
1999-10-20 01:53:03 +05:30
return;
inode = Inode2 + i;
if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
&& !S_ISLNK(inode->i_mode))
1999-10-20 01:53:03 +05:30
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);
1999-10-20 01:53:03 +05:30
}
#endif
static void check_file(struct minix1_inode *dir, unsigned offset)
1999-10-20 01:53:03 +05:30
{
struct minix1_inode *inode;
1999-10-20 01:53:03 +05:30
int ino;
char *name;
1999-10-20 01:53:03 +05:30
int block;
block = map_block(dir, offset / BLOCK_SIZE);
read_block(block, check_file_blk);
name = check_file_blk + (offset % BLOCK_SIZE) + 2;
ino = *(uint16_t *) (name - 2);
1999-10-20 01:53:03 +05:30
if (ino > INODES) {
printf("%s contains a bad inode number for file '%.*s'. ",
current_name, namelen, name);
if (ask("Remove", 1)) {
*(uint16_t *) (name - 2) = 0;
write_block(block, check_file_blk);
1999-10-20 01:53:03 +05:30
}
ino = 0;
}
push_filename(name);
1999-10-20 01:53:03 +05:30
inode = get_inode(ino);
pop_filename();
1999-10-20 01:53:03 +05:30
if (!offset) {
2007-01-03 06:11:53 +05:30
if (inode && LONE_CHAR(name, '.'))
return;
2007-01-03 06:11:53 +05:30
printf("%s: bad directory: '.' isn't first\n", current_name);
errors_uncorrected = 1;
1999-10-20 01:53:03 +05:30
}
if (offset == dirsize) {
2007-01-03 06:11:53 +05:30
if (inode && strcmp("..", name) == 0)
return;
2007-01-03 06:11:53 +05:30
printf("%s: bad directory: '..' isn't second\n", current_name);
errors_uncorrected = 1;
1999-10-20 01:53:03 +05:30
}
if (!inode)
return;
push_filename(name);
if (OPT_list) {
if (OPT_verbose)
printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
1999-10-20 01:53:03 +05:30
}
check_zones(ino);
if (inode && S_ISDIR(inode->i_mode))
recursive_check(ino);
pop_filename();
1999-10-20 01:53:03 +05:30
}
#if ENABLE_FEATURE_MINIX2
static void check_file2(struct minix2_inode *dir, unsigned offset)
1999-10-20 01:53:03 +05:30
{
struct minix2_inode *inode;
int ino;
char *name;
int block;
block = map_block2(dir, offset / BLOCK_SIZE);
read_block(block, check_file_blk);
name = check_file_blk + (offset % BLOCK_SIZE) + 2;
ino = *(uint16_t *) (name - 2);
1999-10-20 01:53:03 +05:30
if (ino > INODES) {
printf("%s contains a bad inode number for file '%.*s'. ",
current_name, namelen, name);
if (ask("Remove", 1)) {
*(uint16_t *) (name - 2) = 0;
write_block(block, check_file_blk);
1999-10-20 01:53:03 +05:30
}
ino = 0;
}
push_filename(name);
inode = get_inode2(ino);
pop_filename();
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if (!offset) {
2007-01-03 06:11:53 +05:30
if (inode && LONE_CHAR(name, '.'))
1999-10-20 01:53:03 +05:30
return;
2007-01-03 06:11:53 +05:30
printf("%s: bad directory: '.' isn't first\n", current_name);
errors_uncorrected = 1;
1999-10-20 01:53:03 +05:30
}
if (offset == dirsize) {
2007-01-03 06:11:53 +05:30
if (inode && strcmp("..", name) == 0)
1999-10-20 01:53:03 +05:30
return;
2007-01-03 06:11:53 +05:30
printf("%s: bad directory: '..' isn't second\n", current_name);
errors_uncorrected = 1;
1999-10-20 01:53:03 +05:30
}
if (!inode)
return;
push_filename(name);
if (OPT_list) {
if (OPT_verbose)
printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
1999-10-20 01:53:03 +05:30
}
check_zones2(ino);
if (inode && S_ISDIR(inode->i_mode))
recursive_check2(ino);
pop_filename();
1999-10-20 01:53:03 +05:30
}
#endif
static void recursive_check(unsigned ino)
1999-10-20 01:53:03 +05:30
{
struct minix1_inode *dir;
unsigned offset;
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dir = Inode1 + ino;
1999-10-20 01:53:03 +05:30
if (!S_ISDIR(dir->i_mode))
die("internal error");
1999-10-20 01:53:03 +05:30
if (dir->i_size < 2 * dirsize) {
printf("%s: bad directory: size<32", current_name);
1999-10-20 01:53:03 +05:30
errors_uncorrected = 1;
}
for (offset = 0; offset < dir->i_size; offset += dirsize)
check_file(dir, offset);
1999-10-20 01:53:03 +05:30
}
#if ENABLE_FEATURE_MINIX2
static void recursive_check2(unsigned ino)
1999-10-20 01:53:03 +05:30
{
struct minix2_inode *dir;
unsigned offset;
1999-10-20 01:53:03 +05:30
dir = Inode2 + ino;
if (!S_ISDIR(dir->i_mode))
die("internal error");
1999-10-20 01:53:03 +05:30
if (dir->i_size < 2 * dirsize) {
printf("%s: bad directory: size<32", current_name);
1999-10-20 01:53:03 +05:30
errors_uncorrected = 1;
}
for (offset = 0; offset < dir->i_size; offset += dirsize)
check_file2(dir, offset);
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}
#endif
1999-10-20 02:22:57 +05:30
static int bad_zone(int i)
1999-10-20 01:53:03 +05:30
{
2007-01-03 06:11:53 +05:30
char buffer[BLOCK_SIZE];
1999-10-20 01:53:03 +05:30
xlseek(dev_fd, BLOCK_SIZE * i, SEEK_SET);
return (BLOCK_SIZE != full_read(dev_fd, buffer, BLOCK_SIZE));
1999-10-20 01:53:03 +05:30
}
1999-10-20 02:22:57 +05:30
static void check_counts(void)
1999-10-20 01:53:03 +05:30
{
int i;
for (i = 1; i <= INODES; i++) {
if (OPT_warn_mode && Inode1[i].i_mode && !inode_in_use(i)) {
printf("Inode %d has non-zero mode. ", i);
if (ask("Clear", 1)) {
Inode1[i].i_mode = 0;
1999-10-20 01:53:03 +05:30
changed = 1;
}
}
if (!inode_count[i]) {
if (!inode_in_use(i))
continue;
printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
if (ask("Clear", 1))
1999-10-20 01:53:03 +05:30
unmark_inode(i);
continue;
}
if (!inode_in_use(i)) {
printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
if (ask("Set", 1))
1999-10-20 01:53:03 +05:30
mark_inode(i);
}
if (Inode1[i].i_nlinks != inode_count[i]) {
printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
i, Inode1[i].i_mode, Inode1[i].i_nlinks,
inode_count[i]);
if (ask("Set i_nlinks to count", 1)) {
Inode1[i].i_nlinks = inode_count[i];
changed = 1;
1999-10-20 01:53:03 +05:30
}
}
}
for (i = FIRSTZONE; i < ZONES; i++) {
if ((zone_in_use(i) != 0) == zone_count[i])
1999-10-20 01:53:03 +05:30
continue;
if (!zone_count[i]) {
if (bad_zone(i))
continue;
printf("Zone %d is marked 'in use', but no file uses it. ", i);
if (ask("Unmark", 1))
1999-10-20 01:53:03 +05:30
unmark_zone(i);
continue;
}
printf("Zone %d: %sin use, counted=%d\n",
i, zone_in_use(i) ? "" : "not ", zone_count[i]);
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}
}
#if ENABLE_FEATURE_MINIX2
static void check_counts2(void)
1999-10-20 01:53:03 +05:30
{
int i;
for (i = 1; i <= INODES; i++) {
if (OPT_warn_mode && Inode2[i].i_mode && !inode_in_use(i)) {
printf("Inode %d has non-zero mode. ", i);
if (ask("Clear", 1)) {
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Inode2[i].i_mode = 0;
changed = 1;
}
}
if (!inode_count[i]) {
if (!inode_in_use(i))
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continue;
printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
if (ask("Clear", 1))
unmark_inode(i);
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continue;
}
if (!inode_in_use(i)) {
printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
if (ask("Set", 1))
mark_inode(i);
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}
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)) {
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Inode2[i].i_nlinks = inode_count[i];
changed = 1;
}
}
}
for (i = FIRSTZONE; i < ZONES; i++) {
if ((zone_in_use(i) != 0) == zone_count[i])
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continue;
if (!zone_count[i]) {
if (bad_zone(i))
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continue;
printf("Zone %d is marked 'in use', but no file uses it. ", i);
if (ask("Unmark", 1))
unmark_zone(i);
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continue;
}
printf("Zone %d: %sin use, counted=%d\n",
i, zone_in_use(i) ? "" : "not ", zone_count[i]);
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}
}
#endif
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static void check(void)
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{
memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
memset(zone_count, 0, ZONES * sizeof(*zone_count));
check_zones(MINIX_ROOT_INO);
recursive_check(MINIX_ROOT_INO);
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check_counts();
}
#if ENABLE_FEATURE_MINIX2
static void check2(void)
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{
memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
memset(zone_count, 0, ZONES * sizeof(*zone_count));
check_zones2(MINIX_ROOT_INO);
recursive_check2(MINIX_ROOT_INO);
check_counts2();
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}
#else
void check2(void);
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#endif
int fsck_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int fsck_minix_main(int argc UNUSED_PARAM, char **argv)
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{
int retcode = 0;
xfunc_error_retval = 8;
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INIT_G();
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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getopt32(argv, "^" OPTION_STR "\0" "=1:ar" /* one arg; -a assumes -r */);
argv += optind;
device_name = argv[0];
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check_mount(); /* trying to check a mounted filesystem? */
if (OPT_manual) {
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if (!isatty(0) || !isatty(1))
die("need terminal for interactive repairs");
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}
xmove_fd(xopen(device_name, OPT_repair ? O_RDWR : O_RDONLY), dev_fd);
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/*sync(); paranoia? */
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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
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* command line.
*/
printf("%s: %s\n", applet_name, bb_banner);
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if (!(Super.s_state & MINIX_ERROR_FS)
&& (Super.s_state & MINIX_VALID_FS) && !OPT_force
) {
if (OPT_repair)
printf("%s is clean, check is skipped\n", device_name);
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return 0;
} else if (OPT_force)
printf("Forcing filesystem check on %s\n", device_name);
else if (OPT_repair)
printf("Filesystem on %s is dirty, needs checking\n",
device_name);
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read_tables();
if (OPT_manual) {
set_termios_to_raw(STDIN_FILENO, &sv_termios, 0);
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termios_set = 1;
}
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if (version2) {
check_root2();
check2();
} else {
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check_root();
check();
}
if (OPT_verbose) {
int i, free_cnt;
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for (i = 1, free_cnt = 0; i <= INODES; i++)
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if (!inode_in_use(i))
free_cnt++;
printf("\n%6u inodes used (%u%%)\n", (INODES - free_cnt),
100 * (INODES - free_cnt) / INODES);
for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++)
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if (!zone_in_use(i))
free_cnt++;
printf("%6u zones used (%u%%)\n\n"
"%6u regular files\n"
"%6u directories\n"
"%6u character device files\n"
"%6u block device files\n"
"%6u links\n"
"%6u symbolic links\n"
"------\n"
"%6u files\n",
(ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES,
regular, directory, chardev, blockdev,
links - 2 * directory + 1, symlinks,
total - 2 * directory + 1);
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}
if (changed) {
write_tables();
puts("FILE SYSTEM HAS BEEN CHANGED");
sync();
} else if (OPT_repair)
write_superblock();
if (OPT_manual)
tcsetattr_stdin_TCSANOW(&sv_termios);
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if (changed)
retcode += 3;
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if (errors_uncorrected)
retcode += 4;
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return retcode;
}