[thirdparty/e2fsprogs.git] / debugfs / unused.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 "config.h"
#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,
		    int sci_idx EXT2FS_ATTR((unused)),
		    void *infop EXT2FS_ATTR((unused)))
{
	blk64_t		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 < ext2fs_blocks_count(current_fs->super); blk++) {
		if (ext2fs_test_block_bitmap2(current_fs->block_map,blk))
			continue;
		retval = io_channel_read_blk64(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 %llu contains non-zero data:\n\n",
		       blk);
		for (i=0; i < current_fs->blocksize; i++)
			fputc(buf[i], stdout);
	}
}
Commit	Line	Data
a5fdcd59 TT	1	/*
a5fdcd59 TT	2	* unused.c --- quick and dirty unused space dumper
efc6f628	3	*
a5fdcd59 TT	4	* Copyright (C) 1997 Theodore Ts'o. This file may be redistributed
	5	* under the terms of the GNU Public License.
	6	*/
	7
d1154eb4	8	#include "config.h"
a5fdcd59 TT	9	#include <stdio.h>
	10	#include <unistd.h>
	11	#include <stdlib.h>
	12	#include <ctype.h>
	13	#include <string.h>
	14	#include <time.h>
	15	#ifdef HAVE_ERRNO_H
	16	#include <errno.h>
	17	#endif
	18	#include <sys/types.h>
	19	#ifdef HAVE_GETOPT_H
	20	#include <getopt.h>
efc6f628	21	#else
a5fdcd59 TT	22	extern int optind;
	23	extern char *optarg;
	24	#endif
	25
	26	#include "debugfs.h"
	27
2fcbcb1b TT	28	void do_dump_unused(int argc EXT2FS_ATTR((unused)), char **argv,
	29	int sci_idx EXT2FS_ATTR((unused)),
	30	void *infop EXT2FS_ATTR((unused)))
a5fdcd59	31	{
048786d7 VAH	32	blk64_t blk;
048786d7 VAH	33	unsigned char buf[EXT2_MAX_BLOCK_SIZE];
54434927	34	unsigned int i;
a5fdcd59 TT	35	errcode_t retval;
a5fdcd59 TT	36
97fa31b9 MK	37	if (common_args_process(argc, argv, 1, 1,
	38	"dump_unused", "", 0))
	39	return;
	40
a5fdcd59	41	for (blk=current_fs->super->s_first_data_block;
4efbac6f	42	blk < ext2fs_blocks_count(current_fs->super); blk++) {
6d879a99	43	if (ext2fs_test_block_bitmap2(current_fs->block_map,blk))
a5fdcd59	44	continue;
24a117ab	45	retval = io_channel_read_blk64(current_fs->io, blk, 1, buf);
a5fdcd59 TT	46	if (retval) {
	47	com_err(argv[0], retval, "While reading block\n");
	48	return;
	49	}
	50	for (i=0; i < current_fs->blocksize; i++)
	51	if (buf[i])
	52	break;
	53	if (i >= current_fs->blocksize)
	54	continue;
048786d7	55	printf("\nUnused block %llu contains non-zero data:\n\n",
a5fdcd59 TT	56	blk);
	57	for (i=0; i < current_fs->blocksize; i++)
	58	fputc(buf[i], stdout);
	59	}
	60	}