UUID_UNPARSE(3) uuid_unparse - UUID #include void uuid_unparse(const uuid_t uu, char *out); void uuid_unparse_upper(const uuid_t uu, char *out); void uuid_unparse_lower(const uuid_t uu, char *out); uuid_unparse() UUID uu 36- ( <<\0>>) 1b4e28ba-2fa1-11d2-883f-0016d3cca427 , out. , uuid_unparse(), . , uuid_unparse_upper() uuid_unparse_lower(). UUID, OSF DCE 1.1. Theodore Y. Ts'o uuid(3), uuid_clear(3), uuid_compare(3), uuid_copy(3), uuid_generate(3), uuid_time(3), uuid_is_null(3), uuid_parse(3) libuuid util-linux, 2.15.1. Linux . util-linux 2.41 2025-03-29 UUID_UNPARSE(3)