restore_tty
restore_tty(fd);
extern void restore_tty __P((int)); /* Restore port's original parameters */
restore_tty();
errcode = restore_tty(fp, &saveparm, &osigint);
static krb5_error_code restore_tty(FILE*, struct termios *, osiginfo *);
restore_tty(fp, &saveparm, &osigint);