+void update_diskio_values(struct diskio_stat *, unsigned int, unsigned int);
+
+void parse_diskio_arg(struct text_object *, const char *);
+void print_diskio(struct text_object *, char *, int);
+void print_diskio_read(struct text_object *, char *, int);
+void print_diskio_write(struct text_object *, char *, int);
+#ifdef X11
+void parse_diskiograph_arg(struct text_object *, const char *);
+void print_diskiograph(struct text_object *, char *, int);
+void print_diskiograph_read(struct text_object *, char *, int);
+void print_diskiograph_write(struct text_object *, char *, int);
+#endif /* X11 */