TCIOFLUSH
(void) ioctl(fd, TCFLSH, TCIOFLUSH);
(void) ioctl(fd, TCFLSH, TCIOFLUSH);
(void) ioctl(FD, TCFLSH, TCIOFLUSH);
(void) ioctl(FD, TCFLSH, TCIOFLUSH);
(void) ioctl(FD, TCFLSH, TCIOFLUSH);
(void) ioctl(FD, TCFLSH, TCIOFLUSH);