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+/* Copyright (C) 1999 Free Software Foundation, Inc. */
+
+/* This file is part of GNU Bash, the Bourne Again SHell.
+
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Bash is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+ * shtty.h -- include the correct system-dependent files to manipulate the
+ * tty
+ */
+
+#ifndef __SH_TTY_H_
+#define __SH_TTY_H_
+
+#include "stdc.h"
+
+#if defined (_POSIX_VERSION) && defined (HAVE_TERMIOS_H) && defined (HAVE_TCGETATTR) && !defined (TERMIOS_MISSING)
+# define TERMIOS_TTY_DRIVER
+#else
+# if defined (HAVE_TERMIO_H)
+# define TERMIO_TTY_DRIVER
+# else
+# define NEW_TTY_DRIVER
+# endif
+#endif
+
+/*
+ * The _POSIX_SOURCE define is to avoid multiple symbol definitions
+ * between sys/ioctl.h and termios.h. Ditto for the test against SunOS4
+ * and the undefining of several symbols.
+ */
+
+#ifdef TERMIOS_TTY_DRIVER
+# if (defined (SunOS4) || defined (SunOS5)) && !defined (_POSIX_SOURCE)
+# define _POSIX_SOURCE
+# endif
+# if defined (SunOS4)
+# undef ECHO
+# undef NOFLSH
+# undef TOSTOP
+# endif /* SunOS4 */
+# include <termios.h>
+# define TTYSTRUCT struct termios
+#else
+# ifdef TERMIO_TTY_DRIVER
+# include <termio.h>
+# define TTYSTRUCT struct termio
+# else /* NEW_TTY_DRIVER */
+# include <sgtty.h>
+# define TTYSTRUCT struct sgttyb
+# endif
+#endif
+
+/* Functions imported from lib/sh/shtty.c */
+
+/* Get and set terminal attributes for the file descriptor passed as
+ an argument. */
+extern int ttgetattr __P((int, TTYSTRUCT *));
+extern int ttsetattr __P((int, TTYSTRUCT *));
+
+/* Save and restore the terminal's attributes from static storage. */
+extern void ttsave __P((void));
+extern void ttrestore __P((void));
+
+/* Return the attributes corresponding to the file descriptor (0 or 1)
+ passed as an argument. */
+extern TTYSTRUCT *ttattr __P((int));
+
+/* These functions only operate on the passed TTYSTRUCT; they don't
+ actually change anything with the kernel's current tty settings. */
+extern int tt_setonechar __P((TTYSTRUCT *));
+extern int tt_setnoecho __P((TTYSTRUCT *));
+extern int tt_seteightbit __P((TTYSTRUCT *));
+extern int tt_setnocanon __P((TTYSTRUCT *));
+extern int tt_setcbreak __P((TTYSTRUCT *));
+
+/* These functions are all generally mutually exclusive. If you call
+ more than one (bracketed with calls to ttsave and ttrestore, of
+ course), the right thing will happen, but more system calls will be
+ executed than absolutely necessary. You can do all of this yourself
+ with the other functions; these are only conveniences. */
+
+/* These functions work with a given file descriptor and set terminal
+ attributes */
+extern int ttfd_onechar __P((int, TTYSTRUCT *));
+extern int ttfd_noecho __P((int, TTYSTRUCT *));
+extern int ttfd_eightbit __P((int, TTYSTRUCT *));
+extern int ttfd_nocanon __P((int, TTYSTRUCT *));
+
+extern int ttfd_cbreak __P((int, TTYSTRUCT *));
+
+/* These functions work with fd 0 and the TTYSTRUCT saved with ttsave () */
+extern int ttonechar __P((void));
+extern int ttnoecho __P((void));
+extern int tteightbit __P((void));
+extern int ttnocanon __P((void));
+
+extern int ttcbreak __P((void));
+
+#endif