uart_recv_ev
size_t uart_recv_ev(int, uint8_t, void *, size_t);
n = uart_recv_ev(fd, HCI_EVENT_VENDOR, &rp, sizeof(rp));
n = uart_recv_ev(fd, HCI_EVENT_COMMAND_STATUS, &cs, sizeof(cs));
n = uart_recv_ev(fd, HCI_EVENT_VENDOR, &v, sizeof(v));