gistfile1.rb

  def self.sys(env, *command)
    IO.pipe do |rd, wr|
      read_thread = Thread.start { rd.read }

      result = system(env, *command, err: wr, out: wr, close_others: true)
      wr.close

      raise "error: #{command * ' '}\n#{read_thread.value}" unless $?.success?

      result
    end
  end