/*
?*?Basic?program?to?add?ext4?encryption?to?a?file?system
?*
?*?Copyright?2015?Google?Inc.
?*
?*?%Begin-Header%
?*?This?file?may?be?redistributed?under?the?terms?of?the?GNU?Public
?*?License.
?*?%End-Header%
?*/

#include?
#include?
#include?
#include?
#include?
#include?
#include?

#include?
#include?

int?main?（int?argc?char?*argv[]）
{
	errcode_t	retval?=?0;
	ext2_filsys	fs;

	setbuf（stdout?NULL）;
	setbuf（stderr?NULL）;
	initialize_ext2_error_table（）;

	if?（argc?!=?2）?{
		fprintf（stderr?“%s:?Usage?\n“?argv[0]）;
		exit（1）;
	}

	retval?=?ext2fs_open（argv[1]?EXT2_FLAG_RW?0?0
			?????unix_io_manager?&fs）;

	if?（retval）?{
		com_err（argv[0]?retval?“while?trying?to?open?‘%s‘“
			argv[1]）;
		exit（1）;
	}
	if?（!ext2fs_has_feature_encrypt（fs->super））?{
		ext2fs_set_feature_encrypt（fs->super）;
		fs->super->s_encrypt_algos[0]?=
			EXT4_ENCRYPTION_MODE_AES_256_XTS;
		fs->super->s_encrypt_algos[1]?=
			EXT4_ENCRYPTION_MODE_AES_256_CTS;
		ext2fs_mark_super_dirty（fs）;
		printf（“Ext4?encryption?enabled?on?%s\n“?argv[1]）;
	}?else
		printf（“Ext4?encryption?already?enabled?on?%s\n“?argv[1]）;

	retval?=?ext2fs_close（fs）;
	if?（retval）?{
		com_err（argv[0]?retval?“while?trying?to?close?‘%s‘“
			argv[1]）;
		exit（1）;
	}
	return?（0）;
}