host_termios
int host_tcgetattr (int, struct host_termios *);
int host_tcsetattr (int, int, const struct host_termios *);
void host_cfmakeraw(struct host_termios *);
int host_cfsetispeed(struct host_termios *, host_speed_t);
int host_cfsetospeed(struct host_termios *, host_speed_t);
int host_cfsetspeed(struct host_termios *, host_speed_t);
static struct host_termios old_settings;
struct host_termios new_settings;
struct host_termios tty;
host_tcgetattr(int fd, struct host_termios *tio)
host_tcsetattr(int fd, int act, const struct host_termios *tio)
host_cfmakeraw(struct host_termios *t)
int host_cfsetospeed(struct host_termios *tio, host_speed_t speed)
int host_cfsetispeed(struct host_termios *tio, host_speed_t speed)
host_cfsetspeed(struct host_termios *tio, host_speed_t speed)