+/* 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 1, 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 GNU Emacs; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/* This file written by James Van Artsdalen of Dell Computer Corporation.
+ * james@bigtex.cactus.org.
+ */
+
+/* Use the SysVr3 file for at least base configuration. */
+
+#include "s-usg5-3.h"
+
+/* We do have multiple jobs. Handle ^Z. */
+
+#undef NOMULTIPLEJOBS
+
+/* If compiled by GNU C, we must have gnulib */
+
+#ifdef __GNUC__
+#define GNULIB /usr/local/lib/gcc-gnulib
+#define LIBS_DEBUG
+#else
+#define GNULIB
+#endif
+
+#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 GNULIB -lsocket -lnsl -lelf -lc /usr/ucblib/libucb.a /usr/ccs/lib/crtn.o
+
+#define DATA_SEG_BITS 0x08000000
+
+/* No <sioctl.h> */
+
+#define NO_SIOCTL_H
+
+/* 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.
+ */
+
+#ifdef emacs
+#include <sys/filio.h>
+#include <termio.h>
+#include <sys/ttold.h>
+#include <signal.h>
+#include <sys/wait.h>
+#include <sys/stream.h>
+#include <sys/stropts.h>
+#include <sys/termios.h>
+#undef SIGIO
+#endif
+
+/* libc has this stuff, but not utimes. */
+
+#define HAVE_RENAME
+#define HAVE_SELECT
+#define HAVE_TIMEVAL
+#define HAVE_CLOSEDIR
+#define HAVE_GETTIMEOFDAY
+#define HAVE_DUP2
+
+#define USE_UTIME
+
+/* <sys/stat.h> *defines* stat(2) as a static function. If "static"
+ * is blank, then many files will have a public definition for stat(2).
+ */
+
+#undef static
+
+/* We need bss_end from emacs.c for undumping */
+
+#ifndef USG_SHARED_LIBRARIES
+#define USG_SHARED_LIBRARIES
+#endif
+
+/* We can support this */
+
+#define CLASH_DETECTION
+
+/* Data type of load average, as read out of kmem. */
+
+#define LOAD_AVE_TYPE long
+
+/* Convert that into an integer that is 100 for a load average of 1.0 */
+/* This is totally uncalibrated. */
+
+#define LOAD_AVE_CVT(x) ((int) ((double) (x)) * 100.0 / FSCALE)
+#define FSCALE 256.0
+
+#define HAVE_PTYS
+#define HAVE_SETSID
+
+/* 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 HAVE_WAIT_HEADER
+#define WAITTYPE int
+#define wait3(status, options, rusage) \
+ waitpid((pid_t) -1, (status), (options))
+#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. */
+
+#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 sigrelse(2). */
+
+#define PTY_TTY_NAME_SPRINTF \
+ { \
+ char *ptsname(), *ptyname; \
+ \
+ sighold(SIGCLD); \
+ if (grantpt(fd) == -1) \
+ fatal("could not grant slave pty"); \
+ sigrelse(SIGCLD); \
+ if (unlockpt(fd) == -1) \
+ fatal("could not unlock slave pty"); \
+ if (!(ptyname = ptsname(fd))) \
+ fatal ("could not enable slave pty"); \
+ 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); \
+ 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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