if ((rrd_file = fopen(file_name,"wb")) == NULL ) {
rrd_set_error("creating '%s': %s",file_name, rrd_strerror(errno));
free(rrd->stat_head);
if ((rrd_file = fopen(file_name,"wb")) == NULL ) {
rrd_set_error("creating '%s': %s",file_name, rrd_strerror(errno));
free(rrd->stat_head);