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/* Definitions file for GNU Emacs running on AT&T's System V Release 4
Copyright (C) 1987, 1990, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
2006, 2007, 2008, 2009, 2010, 2011, 2012 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 3 of the License, 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
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs. If not, see <>. */
/* This file written by James Van Artsdalen of Dell Computer Corporation.
* Subsequently improved for Dell 2.2 by Eric
* S. Raymond <>.
/* Use the SysVr3 file for at least base configuration. */
#define USG /* System III, System V, etc */
#define USG5
#define USG5_4
/* SYSTEM_TYPE should indicate the kind of system you are using.
It sets the Lisp variable system-type. */
#define SYSTEM_TYPE "usg-unix-v"
* Define HAVE_TERMIO if the system provides sysV-style ioctls
* for terminal control.
* 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
/* 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. */
* Make the sigsetmask function go away. Don't know what the
* ramifications of this are, but doesn't seem possible to
* emulate it properly anyway at this point.
#define sigsetmask(mask) /* Null expansion */
/* 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) */
#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. */
/* If we're using the System V X port, BSD bstring functions will be handy */
#define BSTRING
#endif /* HAVE_X_WINDOWS */
/* On USG systems signal handlers return void */
#define SIGTYPE void
/* there are no -lg libraries on this system, and no libPW */
#define LIBS_DEBUG
/* 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.
#ifndef NOT_C_CODE
#include <sys/wait.h>
#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>
/* 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.
#define NSIG_MINIMUM 32
/* We can support this */
#define HAVE_PTYS
/* 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) \
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. */
/* 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");
/* 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). */
{ \
char *ptsname (), *ptyname; \
sighold (SIGCLD); \
if (grantpt (fd) == -1) \
{ emacs_close (fd); return -1; } \
sigrelse (SIGCLD); \
if (unlockpt (fd) == -1) \
{ emacs_close (fd); return -1; } \
if (!(ptyname = ptsname (fd))) \
{ emacs_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. */
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);
/* This definition was suggested for next release.
So give it a try. */
/* arch-tag: 1a0ed909-5faa-434b-b7c3-9d86c63d53a6
(do not change this comment) */
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