static int tty_serial_ioctl(CharDriverState *chr, int cmd, void *arg) FDCharDriver *s = chr->opaque; switch(cmd) { case CHR_IOCTL_SERIAL_SET_PARAMS: QEMUSerialSetParams *ssp = arg; tty_serial_init(s->fd_in, ssp->speed, ssp->parity, ssp->data_bits, ssp->stop_bits); case CHR_IOCTL_SERIAL_SET_BREAK: int enable = *(int *)arg; if (enable) tcsendbreak(s->fd_in, 1); default: return -ENOTSUP; return 0;