text: STTY(3) BSD Programmer's Manual STTY(3)
  stty, gtty - set and get terminal state (defunct)
  #include <sgtty.h> stty(int fd, struct sgttyb *buf); gtty(int fd, struct sgttyb *buf);
  These interfaces are obsoleted by ioctl(2). They are available from the compatibility library, libcompat. The stty() function sets the state of the terminal associated with fd. The gtty() function expla- nation.
  If the call is successful 0 is returned, otherwise -1 is returned and the global variable errno contains the reason for the failure.
  ioctl(2), tty(4)
  The previous reincarnation of the stty() function was in Version 2 AT&T UNIX. The stty() and gtty() functions then.