socketpair function
Create a pair of sockets
socketpair
SOCKET1,SOCKET2,DOMAIN,TYPE,PROTOCOL
Creates an unnamed pair of sockets in the specified domain, of the specified type.
DOMAIN,
TYPE, and
PROTOCOL are specified the same as for the system call of the same name. If unimplemented, yields a fatal error. Returns
TRUE if successful.
Some systems defined pipe() in terms of socketpair(), in which a call to pipe(Rdr, Wtr) is essentially:
use Socket;
socketpair(Rdr, Wtr, AF_UNIX, SOCK_STREAM, PF_UNSPEC);
shutdown(Rdr, 1); # no more writing for reader
shutdown(Wtr, 0); # no more reading for writer
See the perlipc manpage for an example of socketpair use.