code: def _wait_for_exit(please_stop):
      
      try:
          import msvcrt
          _wait_for_exit_on_windows(please_stop)
      except:
          pass
  
      cr_count = 0  # COUNT NUMBER OF BLANK LINES
  
      while not please_stop:
          # DEBUG and Log.note("inside wait-for-shutdown loop")
          if cr_count > 30:
              (Till(seconds=3) | please_stop).wait()
          try:
              line = sys.stdin.readline()
          except Exception as e:
              Except.wrap(e)
              if "Bad file descriptor" in e:
                  _wait_for_interrupt(please_stop)
                  break
  
          # DEBUG and Log.note("read line {{line|quote}}, count={{count}}", line=line, count=cr_count)
          if line == "":
              cr_count += 1
          else:
              cr_count = -1000000  # NOT /dev/null
  
          if line.strip() == "exit":
              Log.alert("'exit' Detected!  Stopping...")
              return
docs: /dev/null PIPED TO sys.stdin SPEWS INFINITE LINES, DO NOT POLL AS OFTEN