docs: def config():
      """
          Reading config file in $HOME directory
          /home/user/.alarm/config
      """
      alarm_day = alarm_time = alarm_attempts = song = []
      for line in open(alarm_config, "r"):
          line = line.lstrip()
          if line.startswith("DAY"):
              alarm_day = line[4:].split()
          if line.startswith("ALARM_TIME"):
              alarm_time = line[11:].split()
          if line.startswith("ATTEMPTS"):
              alarm_attempts = line[9:].split()
          if line.startswith("SONG"):
              song = line[5:].split()
      if alarm_day == ["today"]:
          alarm_day = time.strftime("%d").split()
      alarm_args = alarm_day + alarm_time + alarm_attempts + song
      if alarm_args:
          if len(alarm_args) == 4:
              return alarm_args
          else:
              print("Error: config file: missing argument")
              sys.exit()
      else:
          print("Error: config file: missing argument")
          sys.exit()