TCOFLUSH
(void) ioctl(FD, TCFLSH, TCOFLUSH);
(void) ioctl(FD, TCFLSH, TCOFLUSH);
(void) ioctl(FD, TCFLSH, TCOFLUSH);
(void) ioctl(f, TCFLSH, TCOFLUSH);
(void) ioctl(FD, TCFLSH, TCOFLUSH);
(void) ioctl(AC, TCFLSH, TCOFLUSH);