# File lib/daemons/pidfile.rb, line 71
    def pid=(p)
      if multiple
        while File.exists?(filename) and @number < 1024
          @number += 1
        end
        
        if @number == 1024
          raise RuntimeException('cannot run more than 1024 instances of the application')
        end
      end
      
      File.open(filename, 'w') {|f|
        f.puts p   #Process.pid
      }
    end