+/* information about an rrd file */
+typedef struct rrd_file_t {
+ int fd; /* file descriptor if this rrd file */
+ char* file_start; /* start address of an open rrd file */
+ off_t header_len; /* length of the header of this rrd file */
+ off_t file_len; /* total size of the rrd file */
+ off_t pos; /* current pos in file */
+} rrd_file_t;
+