#include<libcryptsetup.h>
#include<stdio.h>
int main( int argc,char * argv[] )
{
	const char * mapper = argv[1] ;

	struct crypt_device * cd;

	if( crypt_init_by_name( &cd,mapper ) != 0 ){
		puts( "crypt_init_by_name() failed" ) ;
		return 1 ;
	}

	const char * cipher = crypt_get_cipher_mode( cd ) ;

	if( cipher == NULL ){
		puts( "cipher: (NULL)" ) ;
	}else{
		printf( "cipher: %s\n",cipher ) ;
	}

	crypt_free( cd );
	return 0 ;
}