doc: finished

src/io_backend/io_backend.h

@@ -31,17 +31,14 @@ struct iob_context
  */
 int iob_init(struct iob_context *context);
 
-/* TODO
- *
- *
- *
+/* @brief Closes the opened buffers and exits the modules gracefully
  */
-void iob_close();
+void iob_close(void);
 
-/*i TODO
- *
- *
+/* @brief reads at most one line of the input and stores it into *stream
  *
+ * @param stream is a pointer that will be set to a string to parse
+ * @return the number of read characters if positive, the error code otherwise
  */
 ssize_t stream_read(char **stream);