# File lib/mongrel/configurator.rb, line 56
    def change_privilege(user, group)
      begin
        if group
          log "Changing group to #{group}."
          Process::GID.change_privilege(Etc.getgrnam(group).gid)
        end

        if user
          log "Changing user to #{user}." 
          Process::UID.change_privilege(Etc.getpwnam(user).uid)
        end
      rescue Errno::EPERM
        log "FAILED to change user:group #{user}:#{group}: #$!"
        exit 1
      end
    end