# File lib/vagrant-lxc/synced_folder.rb, line 50
      def enable(machine, folders, _opts)
        # Emit an upstart event if we can
        return unless machine.communicate.test("test -x /sbin/initctl")

        # short guestpaths first, so we don't step on ourselves
        folders = folders.sort_by do |id, data|
          if data[:guestpath]
            data[:guestpath].length
          else
            # A long enough path to just do this at the end.
            10000
          end
        end

        folders.each do |id, data|
          guest_path = data[:guestpath]
          machine.communicate.sudo(
            "/sbin/initctl emit --no-wait vagrant-mounted MOUNTPOINT=#{guest_path}")
        end
      end