actions :set
default_action :set

attribute :key,   :kind_of => String, :name_attribute => true
attribute :value, :kind_of => String, :required => true
attribute :scope, :equal_to => %w(local global system), :default => 'global'
attribute :path,  :kind_of => String
attribute :user,  :kind_of => String
attribute :options, :kind_of => String

attr_accessor :exists