void uuid_unparse(uuid_t uu, char *out);
void uuid_unparse_upper(uuid_t uu, char *out);
void uuid_unparse_lower(uuid_t uu, char *out);
DESCRIPTIONThe uuid_unparse function converts the supplied UUID uu from the binary representation into a 36-byte string (plus tailing '\0') of the form 1b4e28ba-2fa1-11d2-883f-0016d3cca427 and stores this value in the character string pointed to by out. The case of the hex digits returned by uuid_unparse may be upper or lower case, and is dependent on the system-dependent local default.
If the case of the hex digits is important then the functions uuid_unparse_upper and uuid_unparse_lower may be used.