in plugin/server_audit/server_audit.cc [2173:2180]
static void rotate_log(MYSQL_THD thd __attribute__((unused)),
struct SYS_VAR *var __attribute__((unused)),
void *var_ptr __attribute__((unused)),
const void *save __attribute__((unused)))
{
if (output_type == OUTPUT_FILE && logfile && *reinterpret_cast<const bool*>(save))
(void) logger_rotate(logfile);
}