# File lib_ctrl/rucy/params.rb, line 426
    def server_setup(control, server)
      unless ($RUCY_DAEMON) then
        stdout_logger = Logger.new(STDOUT)
        case (@params['stdout_logging_level'])
        when 'emerg'
          stdout_logger.level = LoggingLevel::LOG_EMERG
        when 'alert'
          stdout_logger.level = LoggingLevel::LOG_ALERT
        when 'crit'
          stdout_logger.level = LoggingLevel::LOG_CRIT
        when 'err'
          stdout_logger.level = LoggingLevel::LOG_ERR
        when 'warning'
          stdout_logger.level = LoggingLevel::LOG_WARNING
        when 'notice'
          stdout_logger.level = LoggingLevel::LOG_NOTICE
        when 'info'
          stdout_logger.level = LoggingLevel::LOG_INFO
        when 'debug'
          stdout_logger.level = LoggingLevel::LOG_DEBUG
        else
          raise "unknown logging level: #{@params['stdout_logging_level'].inspect}"
        end
        server.add_logger(stdout_logger)
        server.debug('add stdout logger.')
      end
      for logfile in @params['logfiles']
        begin
          output = File.open(logfile['path'], 'a')
          control.add_logfile(output)
          file_logger = Logger.new(output)
          case (logfile['logging_level'])
          when 'emerg'
            file_logger.level = LoggingLevel::LOG_EMERG
          when 'alert'
            file_logger.level = LoggingLevel::LOG_ALERT
          when 'crit'
            file_logger.level = LoggingLevel::LOG_CRIT
          when 'err'
            file_logger.level = LoggingLevel::LOG_ERR
          when 'warning'
            file_logger.level = LoggingLevel::LOG_WARNING
          when 'notice'
            file_logger.level = LoggingLevel::LOG_NOTICE
          when 'info'
            file_logger.level = LoggingLevel::LOG_INFO
          when 'debug'
            file_logger.level = LoggingLevel::LOG_DEBUG
          else
            raise "unknown logging level: #{logfile['logging_level'].inspect}"
          end
          server.add_logger(file_logger)
          server.debug("open #{logfile['path'].inspect} logger.")
        rescue StandardError, ScriptError
          server.err("error: not opened #{logfile['path'].inspect}: (#{$!.class}) #{$!}")
          control.logging_errors.push({ :logfile => logfile['path'],
                                        :exception => $!
                                      })
        end
      end
      nil
    end