silent_system

# File lib/rubygems/util.rb, line 75
  def self.silent_system *command
    opt = {:out => NULL_DEVICE, :err => [:child, :out]}
    if Hash === command.last
      opt.update(command.last)
      cmds = command[0...-1]
    else
      cmds = command.dup
    end
    return system(*(cmds << opt))
  rescue TypeError
    require 'thread'

    @silent_mutex ||= Mutex.new

    null_device = NULL_DEVICE

    @silent_mutex.synchronize do
      begin
        stdout = STDOUT.dup
        stderr = STDERR.dup

        STDOUT.reopen null_device, 'w'
        STDERR.reopen null_device, 'w'

        return system(*command)
      ensure
        STDOUT.reopen stdout
        STDERR.reopen stderr
        stdout.close
        stderr.close
      end
    end
  end