#include<libcryptsetup.h>
#include<stdio.h>
#include<string.h>

int main( int argc,char * argv[] )
{
	struct crypt_device * cd;
	const char * id ;
	const char * mapper = argv[1] ;

	if( crypt_init_by_name( &cd,mapper ) < 0 ){
		perror( "crypt_init_by_name() failed" ) ;
		crypt_free( cd ) ;
		return 1 ;
	}

	id = crypt_get_uuid( cd ) ;

	if( id == NULL ){
		perror( "crypt_get_uuid() failed" ) ;
		crypt_free( cd ) ;
		return 1 ;
	}else{
		printf( "UUID=%s\n",id ) ;
	}

	crypt_free( cd ) ;
	return 0 ;
}