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diff --git a/exp_tty_in.h b/exp_tty_in.h
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+++ b/exp_tty_in.h
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+/* exp_tty_in.h - internal tty support definitions */
+
+/* Definitions for handling termio inclusion are localized here */
+/* This file should be included only if direct access to tty structures are */
+/* required.  This file is necessary to avoid  mismatch between gcc's and */
+/* vendor's include files */
+
+/* Written by Rob Savoye <rob@cygnus.com>. Mon Feb 22 11:16:53 RMT 1993 */
+
+#ifndef __EXP_TTY_IN_H__
+#define __EXP_TTY_IN_H__
+
+#include "expect_cf.h"
+
+#ifdef __MACHTEN__
+#include "sys/types.h"
+#endif
+
+/*
+ * Set up some macros to isolate tty differences
+ */
+
+/* On some hosts, termio is incomplete (broken) and sgtty is a better
+choice.  At the same time, termio has some definitions for modern
+stuff like window sizes that sgtty lacks - that's why termio.h
+is included even when we claim the basic style is sgtty
+*/
+
+/* test for pyramid may be unnecessary, but only Pyramid people have */
+/* complained - notably pclink@qus102.qld.npb.telecom.com.au (Rick) */
+#if defined(pyr) && defined(HAVE_TERMIO) && defined(HAVE_SGTTYB)
+#undef HAVE_SGTTYB
+#endif
+
+/* on ISC SVR3.2, termios is skeletal and termio is a better choice.  */
+/* sgttyb must also be avoided because it redefines same things that */
+/* termio does */
+/* note that both SVR3.2 and AIX lacks TCGETS or TCGETA in termios.h */
+/* but SVR3.2 lacks both TCSETATTR and TCGETS/A */
+#if defined(HAVE_TERMIO) && defined(HAVE_TERMIOS) && !defined(HAVE_TCGETS_OR_TCGETA_IN_TERMIOS_H) && !defined(HAVE_TCSETATTR)
+# undef HAVE_TERMIOS
+# undef HAVE_SGTTYB
+#endif
+
+#if defined(HAVE_TERMIO) && !defined(HAVE_TERMIOS)
+#  include <termio.h>
+#  undef POSIX
+#  define TERMINAL termio
+#  ifndef TCGETS
+#    define TCGETS	TCGETA
+#    define TCSETS	TCSETA
+#    define TCSETSW	TCSETAW
+#    define TCSETSF	TCSETAF
+#  endif
+#endif
+
+#if defined(HAVE_SGTTYB) && !defined(HAVE_TERMIOS)
+#  undef HAVE_TERMIO
+#  undef POSIX
+#ifndef TCGETS
+#  define TCGETS	TIOCGETP
+#  define TCSETS	TIOCSETP
+#endif
+#ifndef TCSETSW
+#  define TCSETSW	TIOCSETN
+#endif
+#  define TERMINAL sgttyb
+#  ifdef HAVE_SYS_FCNTL_H
+#    include <sys/fcntl.h>
+#  else
+#    include <fcntl.h>
+#  endif
+#  include <sgtty.h>
+#  include <sys/ioctl.h>
+#endif
+
+
+#if defined(HAVE_TERMIOS)
+#  undef HAVE_TERMIO
+#  undef HAVE_SGTTYB
+#  include <termios.h>
+#  define TERMINAL termios
+#  if !defined(TCGETS) || !defined(TCSETS)
+#    define TCGETS	TCGETA
+#    define TCSETS	TCSETA
+#    define TCSETSW	TCSETAW
+#    define TCSETSF	TCSETAF
+#  endif
+#endif
+
+/* This section was written by: Don Libes, NIST, 2/6/90 */
+
+typedef struct TERMINAL exp_tty;
+extern exp_tty exp_tty_original;
+extern exp_tty exp_tty_current;
+extern exp_tty exp_tty_cooked;
+
+#include "exp_tty.h"
+
+#endif	/* __EXP_TTY_IN_H__ */