gistfile1.rb

#! /usr/bin/ruby

require "socket"
require "etc"

MySocket = "/tmp/drb.madcap"

class String
	#randomly set case of each letter
        def madcap
                self.scan(/./).map do |s|
                        if rand(2) == 0
                                s.downcase
                        else
                            	s.upcase
                                end
                        end.join
                end
        end

if pid = fork # run in the background
        Process.detach(pid)
        exit
	end

File.unlink(MySocket) if File.exists?(MySocket)

begin
     	# create/init server socket
        server = UNIXServer.new(MySocket)
        File.chmod(0777, MySocket)
rescue Errno::EADDRINUSE
        puts "Already listening on #{MySocket}"
        exit
rescue Exception => exc
        puts exc.message
        exit
	end

signature = " (brought to you by #{Etc.getpwuid(Process::euid).name})"

loop do
       	sock = server.accept # listen
        reply = sock.gets.strip.sub(signature, "").madcap
        reply << signature
        sock.print reply
        sock.close
        end