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/*
* 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);
}
}
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