+void rrd_graph_init(image_desc_t *);
+void rrd_graph_options(int, char **, image_desc_t *);
+void rrd_graph_script(int, char **, image_desc_t *);
+int rrd_graph_check_vname(image_desc_t *, char *, char *);
+int rrd_graph_check_CF(image_desc_t *, char *, char *);