read(*args) -> String | nil[permalink][rdoc][edit](?Integer length, ?Integer offset, ?mode: Integer | String, ?flags: Integer, ?external_encoding: encoding, ?internal_encoding: encoding, ?encoding: encoding, ?textmode: boolish, ?binmode: boolish, ?autoclose: boolish) → String-
IO.read(self.to_s, *args)と同じです。
[SEE_ALSO] IO.read