I see stuff like: -      if LibC.tcsetattr(self.fileno, LibC::TCSADRAIN, tmp) != 0
-        raise SystemCallError.new("tcsetattr", FFI.errno)
+      if LibC.tcsetattr(self.fileno, LibC::TCSANOW, tmp) != 0
+        raise SystemCallError.new(path, FFI.errno)