This uses Unix domain sockets, it's from the perlipc manpage. you didn't specify what you were looking for 
#!/usr/bin/perl -w
# The client

use Socket;
use strict;
my ($socky, $line);

$socky = shift || '/tmp/mysock';
socket(SOCK, PF_UNIX, SOCK_STREAM, 0)  || die "socket: $!";
connect(SOCK, sockaddr_un($socky))     || die "connect: $!";

while (defined($line = <SOCK>)) {
    print $line;
}

exit;

#################
#!/usr/bin/perl -wT
# The server

use Socket;
use strict;
use Carp;

BEGIN { 
    $ENV{PATH} = '/usr/ucb:/bin';
}

sub logit { 
    print "$0 $$: @_ at ", scalar localtime, "\n";
}

my $NAME = '/tmp/mysock';
my $uaddr = sockaddr_un($NAME);
my $proto = getprotobyname('tcp');

socket(Server,PF_UNIX,SOCK_STREAM,0)        || die "socket: $!";
unlink($NAME);
bind  (Server, $uaddr)                      || die "bind: $!";
listen(Server,SOMAXCONN)                    || die "listen: $!";

logit "server started on $NAME";

my $waitedpid;

sub REAPER {
    $waitedpid = wait;
    $SIG{CHLD} = \&REAPER;
    logit "reaped $waitedpid" . ($? ? " with exit $?" : '');
}

$SIG{CHLD} = \&REAPER;

for ($waitedpid = 0;
     accept(Client,Server) || $waitedpid;
     $waitedpid = 0, close Client) {
    next if $waitedpid;
    logit "connection on $NAME";

    spawn sub {
        print "Hello there, it's now ", scalar localtime, "\n";
                exec '/usr/games/fortune' or die "can't exec fortune: 
+$!";
         };
}

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In reply to Re: Single-machine IPC via sockets and other things to say in the dark by BastardOperator
in thread "Single-machine IPC via sockets" and other things to say in the dark by Hot Pastrami

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