my $file = shift @ARGV;

if (open my $FH , $file) {
    my $start_pattern_found = 0;
    while (my $line = <$FH>) {
        if ($start_pattern_found and $line =~ m{^need\s+this}) {
            print "found: $line";
        }
        elsif ($line =~ m{^internal\s+name}) {
            $start_pattern_found++;
        }
    }
    close $FH;
}
else {
    die "failed to open '$file' ($!)\n";
}