# File lib/openshift-origin-node/model/unix_user.rb, line 421
    def run_as(&block)
      old_gid = Process::GID.eid
      old_uid = Process::UID.eid
      fork{
        Process::GID.change_privilege(@gid.to_i)
        Process::UID.change_privilege(@uid.to_i)
        yield block
      }
      Process.wait
    end