savetty
if (cfgetispeed(&tb) != cfgetispeed(&savetty)) {
(void) cfsetispeed(&tb, cfgetispeed(&savetty));
if (cfgetospeed(&tb) != cfgetospeed(&savetty)) {
(void) cfsetospeed(&tb, cfgetospeed(&savetty));
static struct termios savetty;
(void) tcsetattr(STDIN_FILENO, TCSANOW, &savetty);
if ((getattr_ret = tcgetattr(STDIN_FILENO, &savetty)) < 0)
speed = cfgetospeed(&savetty);
if (savetty())
static int savetty(void);
savetty = intty;
intty = savetty;
bool savetty;
extern int savetty(void);
extern int savetty(void);
savetty();