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/* Definitions file for GNU Emacs running on AT&T's System V Release 4
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   Copyright (C) 1987, 1990, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
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                 2006, 2007, 2008, 2009, 2010  Free Software Foundation, Inc.
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This file is part of GNU Emacs.

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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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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
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along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
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/* This file written by James Van Artsdalen of Dell Computer Corporation.
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 * james@bigtex.cactus.org.  Subsequently improved for Dell 2.2 by Eric
 * S. Raymond <esr@snark.thyrsus.com>.
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 */

/* Use the SysVr3 file for at least base configuration. */

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#define USG				/* System III, System V, etc */
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#define USG5
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#define USG5_4

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/* SYSTEM_TYPE should indicate the kind of system you are using.
 It sets the Lisp variable system-type.  */
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#define SYSTEM_TYPE "usg-unix-v"
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/*
 *	Define HAVE_TERMIO if the system provides sysV-style ioctls
 *	for terminal control.
 */

#define HAVE_TERMIO

/*
 *	Define HAVE_PTYS if the system supports pty devices.
 */

/*
 * 	Define SYSV_SYSTEM_DIR to use the V.3 getdents/readir
 *	library functions.  Almost, but not quite the same as
 *	the 4.2 functions
 */
#define SYSV_SYSTEM_DIR

/* The file containing the kernel's symbol table is called /unix.  */

#define KERNEL_FILE "/unix"

/* The symbol in the kernel where the load average is found
   is named avenrun.  */

#define LDAV_SYMBOL "avenrun"

/* Special hacks needed to make Emacs run on this system.  */

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#define POSIX_SIGNALS
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/* setjmp and longjmp can safely replace _setjmp and _longjmp,
   but they will run slower.  */

#define _setjmp setjmp
#define _longjmp longjmp

/* On USG systems these have different names */
#ifndef HAVE_INDEX
#define index strchr
#endif /* ! defined (HAVE_INDEX) */
#ifndef HAVE_RINDEX
#define rindex strrchr
#endif /* ! defined (HAVE_RINDEX) */

/* Use terminfo instead of termcap.  */

#define TERMINFO


/* The docs for system V/386 suggest v.3 has sigpause,
   so let's give it a try.  */
#define HAVE_SYSV_SIGPAUSE


/* If we're using the System V X port, BSD bstring functions will be handy */

#ifdef HAVE_X_WINDOWS
#define BSTRING
#endif /* HAVE_X_WINDOWS */

/* On USG systems signal handlers return void */

#define SIGTYPE void
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#define ORDINARY_LINK

#define LIB_STANDARD
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/* there are no -lg libraries on this system, and no libPW */

#define LIBS_DEBUG
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/* Undump with ELF */

#undef COFF

#define UNEXEC unexelf.o

/* Get FIONREAD from <sys/filio.h>.  Get <sys/ttold.h> to get struct
 * tchars. But get <termio.h> first to make sure ttold.h doesn't
 * interfere.  And don't try to use SIGIO yet.
 */

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#ifndef NOT_C_CODE
#include <sys/wait.h>
#endif

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#ifdef emacs
#include <sys/filio.h>
#include <termio.h>
#include <sys/ttold.h>
#include <signal.h>
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#include <sys/stream.h>
#include <sys/stropts.h>
#include <sys/termios.h>
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#define BROKEN_SIGIO
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#endif

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/* Some SVr4s don't define NSIG in sys/signal.h for ANSI environments;
 * instead, there's a system variable _sys_nsig.  Unfortunately, we need the
 * constant to dimension an array.  So wire in the appropriate value here.
 */
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#define NSIG_MINIMUM 32
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/* We can support this */

#define CLASH_DETECTION

#define HAVE_PTYS
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#define HAVE_TERMIOS
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/* It is possible to receive SIGCHLD when there are no children
   waiting, because a previous waitsys(2) cleaned up the carcass of child
   without clearing the SIGCHLD pending info.  So, use a non-blocking
   wait3 instead, which maps to waitpid(2) in SysVr4. */

#define wait3(status, options, rusage) \
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  waitpid ((pid_t) -1, (status), (options))
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#define WRETCODE(w) (w >> 8)

/* TIOCGPGRP is broken in SysVr4, so we can't send signals to PTY
   subprocesses the usual way.  But TIOCSIGNAL does work for PTYs, and
   this is all we need.  */

#define TIOCSIGSEND TIOCSIGNAL

/* This change means that we don't loop through allocate_pty too many
   times in the (rare) event of a failure. */

#define FIRST_PTY_LETTER 'z'

/* This sets the name of the master side of the PTY. */

#define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");

/* Push various streams modules onto a PTY channel. */

#define SETUP_SLAVE_PTY \
  if (ioctl (xforkin, I_PUSH, "ptem") == -1)	\
    fatal ("ioctl I_PUSH ptem", errno);		\
  if (ioctl (xforkin, I_PUSH, "ldterm") == -1)	\
    fatal ("ioctl I_PUSH ldterm", errno);	\
  if (ioctl (xforkin, I_PUSH, "ttcompat") == -1) \
    fatal ("ioctl I_PUSH ttcompat", errno);

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/* This definition was suggested for next release.
   So give it a try.  */
#define HAVE_SOCKETS
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/* arch-tag: 1a0ed909-5faa-434b-b7c3-9d86c63d53a6
   (do not change this comment) */