close(READER) or die "can't close READER: $!";

    open STDIN,  '<',  '/dev/null' or die "can't open STDIN: $!\n";
    open STDOUT, '>',  '/dev/null' or die "can't open STDOUT: $!\n";
    open STDERR, '>&', \*STDOUT'   or die "can't dup STDOUT: $!\n";