start_export

# File lib/shell/system-command.rb, line 109
    def start_export
      notify "job(%id) start exp-pipe.", @shell.debug?
      _eop = true
      Thread.start{
        begin
          @input.each do |l|
            ProcessController::block_output_synchronize do
              @pipe_out.print l
            end
          end
          _eop = false
        rescue Errno::EPIPE, Errno::EIO
          _eop = false
        ensure
          if !ProcessController::USING_AT_EXIT_WHEN_PROCESS_EXIT and _eop
            notify("shell: warn: Process finishing...",
                   "wait for Job(%id) to finish pipe exporting.",
                   "You can use Shell#transact or Shell#check_point for more safe execution.")
            redo
          end
          notify "job(%id) close exp-pipe.", @shell.debug?
          @pipe_out.close
        end
      }
    end