// ParseUnixCredentials decodes a socket control message that contains
// credentials in a Ucred structure. To receive such a message, the
// SO_PASSCRED option must be enabled on the socket.
func ParseUnixCredentials(m *SocketControlMessage) (*Ucred, error) {
	if m.Header.Level != SOL_SOCKET {
		return nil, EINVAL
	}
	if m.Header.Type != SCM_CREDENTIALS {
		return nil, EINVAL
	}
	ucred := *(*Ucred)(unsafe.Pointer(&m.Data[0]))

		{"SockaddrNetlink.Pid", Field, 0},
		{"SockaddrUnix", Type, 0},
		{"SockaddrUnix.Name", Field, 0},
		{"Socket", Func, 0},
		{"SocketControlMessage", Type, 0},
		{"SocketControlMessage.Data", Field, 0},
		{"SocketControlMessage.Header", Field, 0},
		{"SocketDisableIPv6", Var, 0},
		{"Socketpair", Func, 0},
		{"Splice", Func, 0},
		{"StartProcess", Func, 0},