+rrd_info_t * rrdc_info (const char *filename);
+time_t rrdc_last (const char *filename);
+time_t rrdc_first (const char *filename, int rraindex);
+int rrdc_create (const char *filename,
+ unsigned long pdp_step,
+ time_t last_up,
+ int no_overwrite,
+ int argc,
+ const char **argv);
+
+