(library (rnrs io simple (6))
   (export eof-object eof-object? 
	   call-with-input-file call-with-output-file
	   input-port? output-port?
	   current-input-port current-output-port current-error-port
	   with-input-from-file with-output-to-file
	   open-input-file open-output-file 
	   close-input-port close-output-port
	   read-char peek-char read 
	   write-char newline display write)
   (import (core primitives)))