--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/s/usg5-4.h	Mon Aug 13 08:45:50 2007 +0200
@@ -0,0 +1,178 @@
+/* Definitions file for GNU Emacs running on AT&T's System V Release 4
+   Copyright (C) 1987, 1990 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs 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 2, or (at your option)
+any later version.
+
+GNU Emacs 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 XEmacs; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* Synched up with: FSF 19.31. */
+
+/* This file written by James Van Artsdalen of Dell Computer Corporation.
+ * james@bigtex.cactus.org.  Subsequently improved for Dell 2.2 by Eric
+ * S. Raymond <esr@snark.thyrsus.com>.
+ */
+
+/* Use the SysVr3 file for at least base configuration. */
+
+#define DONT_DEFINE_NO_REMAP /* `static' hack not needed */
+#include "usg5-3.h"
+
+#define USG5_4
+
+#define LIBS_SYSTEM -lsocket -lnsl -lelf
+#define ORDINARY_LINK
+
+#if 0
+#ifdef ORDINARY_LINK
+#define LIB_STANDARD -lc /usr/ucblib/libucb.a
+#else
+#define START_FILES pre-crt0.o /usr/ccs/lib/crt1.o /usr/ccs/lib/crti.o /usr/ccs/lib/values-Xt.o
+#define LIB_STANDARD -lc /usr/ucblib/libucb.a /usr/ccs/lib/crtn.o
+#endif
+#else
+
+#ifdef ORDINARY_LINK
+#define LIB_STANDARD
+#else
+#define START_FILES pre-crt0.o /usr/ccs/lib/crt1.o /usr/ccs/lib/crti.o /usr/ccs/lib/values-Xt.o
+#define LIB_STANDARD -lc /usr/ccs/lib/crtn.o
+#endif
+#endif
+
+/* there are no -lg libraries on this system, and no libPW */
+
+#define LIBS_DEBUG
+/* This is turned off because nobody actually uses LIBS_STANDARD (Nov 1995).
+   That name is a typo.  The next step is to delete this entirely.  */
+/* #define LIBS_STANDARD -lc */
+
+/* No <sioctl.h> */
+
+#define NO_SIOCTL_H
+
+/* Undump with ELF */
+
+#undef COFF
+
+#define UNEXEC unexelf.o
+
+/* Get <sys/ttold.h> to get struct
+ * tchars. But get <termio.h> first to make sure ttold.h doesn't
+ * interfere.
+ */
+
+#ifndef NOT_C_CODE
+#include <sys/wait.h>
+#endif
+
+#ifdef emacs
+#include <sys/filio.h>
+#include <termio.h>
+#include <sys/ttold.h>
+#include <signal.h>
+#include <sys/stream.h>
+#include <sys/stropts.h>
+#include <sys/termios.h>
+#endif
+
+#undef BROKEN_SIGIO
+
+/* 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.
+ */
+
+#ifndef NSIG
+#define NSIG	32
+#endif
+
+/* We need bss_end from emacs.c for undumping */
+
+#ifndef USG_SHARED_LIBRARIES
+#define USG_SHARED_LIBRARIES
+#endif
+
+#define HAVE_PTYS
+#undef BROKEN_TIOCGWINSZ
+#undef BROKEN_TIOCGETC
+
+/* 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. */
+
+#undef FIRST_PTY_LETTER
+#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");
+
+/* This sets the name of the slave side of the PTY.  On SysVr4,
+   grantpt(3) forks a subprocess, so keep sigchld_handler() from
+   intercepting that death.  If any child but grantpt's should die
+   within, it should be caught after EMACS_UNBLOCK_SIGNAL. */
+
+/* XEmacs change */
+#ifndef NOT_C_CODE
+# if !__STDC__ && !defined(STDC_HEADERS)
+char *ptsname ();
+# endif
+#endif
+
+#define PTY_TTY_NAME_SPRINTF				\
+  {							\
+    char *ptyname;					\
+							\
+    EMACS_BLOCK_SIGCHLD;				\
+    if (grantpt (fd) == -1)				\
+      { close (fd); return -1; }			\
+    EMACS_UNBLOCK_SIGCHLD;				\
+    if (unlockpt (fd) == -1)				\
+      { close (fd); return -1; }			\
+    if (!(ptyname = ptsname (fd)))			\
+      { close (fd); return -1; }			\
+    strncpy (pty_name, ptyname, sizeof (pty_name));	\
+    pty_name[sizeof (pty_name) - 1] = 0;		\
+  }
+
+/* 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 %d\n", errno);	\
+  if (ioctl (xforkin, I_PUSH, "ldterm") == -1)		\
+    fatal ("ioctl I_PUSH ldterm: errno %d\n", errno);	\
+  if (ioctl (xforkin, I_PUSH, "ttcompat") == -1) 	\
+    fatal ("ioctl I_PUSH ttcompat: errno %d\n", errno);
+
+/* Undo the SVr3 X11 library definition */
+#undef LIB_X11_LIB
+
+/* The definition of this in s-usg5-3.h is not needed in 5.4.  */
+/* liblnsl_s should never be used.  The _s suffix implies a shared
+   library, as opposed to a DLL.  Share libraries were used in SVR3, and are
+   available only in order to allow SVR3 binaries to run.  They should not be
+   linked in to new binaries. -- caraway!pinkas@caraway.intel.com.  */
+#undef LIBX10_SYSTEM
+#undef LIBX11_SYSTEM
+
+/* Tell x11term.c and keyboard.c we have the system V streams feature.  */
+#define SYSV_STREAMS