pub unsafe extern "C" fn rrd_create_r2(
filename: *const c_char,
pdp_step: c_ulong,
last_up: time_t,
no_overwrite: c_int,
sources: *mut *const c_char,
_template: *const c_char,
argc: c_int,
argv: *mut *const c_char,
) -> c_int