* @return 0 on success, errno on failure
**/
int chmod( const Pathname & path, mode_t mode );
+
+ /**
+ * Add the \c mode bits to the file given by path.
+ *
+ * @return 0 on success, errno on failure
+ */
+ int addmod( const Pathname & path, mode_t mode );
+
+ /**
+ * Remove the \c mode bits from the file given by path.
+ *
+ * @return 0 on success, errno on failure
+ */
+ int delmod( const Pathname & path, mode_t mode );
//@}
///////////////////////////////////////////////////////////////////