# File lib/em/processes.rb, line 103
103:   def EventMachine::system cmd, *args, &cb
104:     cb ||= args.pop if args.last.is_a? Proc
105:     init = args.pop if args.last.is_a? Proc
106: 
107:     EM.popen(cmd, SystemCmd, cb) do |c|
108:       init[c] if init
109:     end
110:   end