mirror of
https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git
synced 2024-11-24 10:33:35 +08:00
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
/*
|
|
* unused.c --- quick and dirty unused space dumper
|
|
*
|
|
* Copyright (C) 1997 Theodore Ts'o. This file may be redistributed
|
|
* under the terms of the GNU Public License.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <ctype.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#ifdef HAVE_ERRNO_H
|
|
#include <errno.h>
|
|
#endif
|
|
#include <sys/types.h>
|
|
#ifdef HAVE_GETOPT_H
|
|
#include <getopt.h>
|
|
#else
|
|
extern int optind;
|
|
extern char *optarg;
|
|
#endif
|
|
|
|
#include "debugfs.h"
|
|
|
|
void do_dump_unused(int argc EXT2FS_ATTR((unused)), char **argv)
|
|
{
|
|
unsigned long blk;
|
|
unsigned char buf[EXT2_MAX_BLOCK_SIZE];
|
|
unsigned int i;
|
|
errcode_t retval;
|
|
|
|
if (common_args_process(argc, argv, 1, 1,
|
|
"dump_unused", "", 0))
|
|
return;
|
|
|
|
for (blk=current_fs->super->s_first_data_block;
|
|
blk < current_fs->super->s_blocks_count; blk++) {
|
|
if (ext2fs_test_block_bitmap(current_fs->block_map,blk))
|
|
continue;
|
|
retval = io_channel_read_blk(current_fs->io, blk, 1, buf);
|
|
if (retval) {
|
|
com_err(argv[0], retval, "While reading block\n");
|
|
return;
|
|
}
|
|
for (i=0; i < current_fs->blocksize; i++)
|
|
if (buf[i])
|
|
break;
|
|
if (i >= current_fs->blocksize)
|
|
continue;
|
|
printf("\nUnused block %lu contains non-zero data:\n\n",
|
|
blk);
|
|
for (i=0; i < current_fs->blocksize; i++)
|
|
fputc(buf[i], stdout);
|
|
}
|
|
}
|