SR_PRIV void serial_restore_params(int fd, void *backup);
SR_PRIV int serial_set_params(int fd, int baudrate, int bits, int parity,
int stopbits, int flowcontrol);
SR_PRIV void serial_restore_params(int fd, void *backup);
SR_PRIV int serial_set_params(int fd, int baudrate, int bits, int parity,
int stopbits, int flowcontrol);