how about a pipe?

#!/usr/bin/perl

system 'mknod thepipe p' unless -p 'thepipe';

if ( fork ) {
        system q(xterm -e 'exec < thepipe; cat');
} else {
        open F, '>thepipe';
        select F;
        $|++;
        for (1..30) {
                print "and a $_ woot!\n";
                sleep 1;
        }
}
unlink 'thepipe';
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