The socketpair keyword

The socketpair function creates an unnamed pair of sockets in the specified domain, of the specified type. The parametres DOMAIN, TYPE, and PROTOCOL are specified the same as for the syscall of the same name. If unimplented, an exception is raised, or returns true on success.

  socket SOCKET1, SOCKET2, DOMAIN, TYPE, PROTOCOL

use Socket;

socketpair(Rdr, Wtr, AF_UNIX, SOCK_STREAM, PF_UNSPEC);