Posix_socket_unix.SockaddrUnixUnix socket_un structure.
val t : t Ctypes.structure Ctypes.typval sun_family : (Posix_socket.sa_family_t, t Ctypes.structure) Ctypes.fieldval sun_path : (char Ctypes.carray, t Ctypes.structure) Ctypes.fieldval from_sockaddr_storage :
Posix_socket.sockaddr_storage Ctypes.ptr ->
t Ctypes.structure Ctypes.ptr