setup vnc server for any subsequent process (like cucumber -> firefox) to use vnc display

gistfile1.rb

 def _vnc_setup
   d = '22'  # vnc desktop number
   ENV['DISPLAY'] = "localhost:#{d}"
   hostname = `hostname`.chomp
   vnc_pid_file = File.join(ENV['HOME'], ".vnc", "#{hostname}:#{d}.pid")
   if File.exist?(vnc_pid_file)
     pid = File.open(vnc_pid_file).read.chomp
     log "Xvnc appears to be already running with pid #{pid}"
     if `/bin/ps -p #{pid}`.split.last =~ /Xvnc/
       return
     else
       log "old pid file found #{vnc_pid_file} . killing and removing.."
       log "vncserver -kill :#{d}"
       log `vncserver -kill :#{d}`
       log "rm #{vnc_pid_file}"
       log `rm #{vnc_pid_file}`
     end
   else
     log "vnc pid file not found #{vnc_pid_file}"
   end
   log "starting new vncserver"
   log "vncserver -geometry 1200x1200 -depth 24 :#{d}"
   fork do
     daemonize
     `vnc4server -geometry 1200x1200 -depth 24 :#{d}`
   end
 end