module Bundler::FileUtils

def user_mask(target)  #:nodoc:
  target.each_char.inject(0) do |mask, chr|
    case chr
    when "u"
      mask | 04700
    when "g"
      mask | 02070
    when "o"
      mask | 01007
    when "a"
      mask | 07777
    else
      raise ArgumentError, "invalid `who' symbol in file mode: #{chr}"
    end
  end
end