src/s/usg5-4-common.h

   1 /* Definitions file for GNU Emacs running on AT&T's System V Release 4
   2
   3 Copyright (C) 1987, 1990, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   4   2006, 2007, 2008, 2009, 2010  Free Software Foundation, Inc.
   5
   6 Written by James Van Artsdalen of Dell Computer Corp. james@bigtex.cactus.org.
   7 Subsequently improved for Dell 2.2 by Eric S. Raymond <esr@snark.thyrsus.com>.
   8
   9 This file is part of GNU Emacs.
  10
  11 GNU Emacs is free software: you can redistribute it and/or modify
  12 it under the terms of the GNU General Public License as published by
  13 the Free Software Foundation, either version 3 of the License, or
  14 (at your option) any later version.
  15
  16 GNU Emacs is distributed in the hope that it will be useful,
  17 but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 GNU General Public License for more details.
  20
  21 You should have received a copy of the GNU General Public License
  22 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  23
  24 /* Use the SysVr3 file for at least base configuration.  */
  25 #define USG                             /* System III, System V, etc */
  26
  27 #define USG5
  28 #define USG5_4
  29
  30 /* SYSTEM_TYPE should indicate the kind of system you are using.
  31    It sets the Lisp variable system-type.  */
  32 #define SYSTEM_TYPE "usg-unix-v"
  33
  34 /* The file containing the kernel's symbol table is called /unix.  */
  35 #define KERNEL_FILE "/unix"
  36
  37 /* The kernel symbol where the load average is found is named avenrun.  */
  38 #define LDAV_SYMBOL "avenrun"
  39
  40 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
  41    but they will run slower.  */
  42 #define _setjmp setjmp
  43 #define _longjmp longjmp
  44
  45 /* The docs for system V/386 suggest v.3 has sigpause, so let's try it.  */
  46 #define HAVE_SYSV_SIGPAUSE
  47
  48 /* On USG systems signal handlers return void.  */
  49 #define SIGTYPE void
  50
  51 /* Get FIONREAD from <sys/filio.h>.  Get <sys/ttold.h> to get struct tchars.
  52    But get <termio.h> first to make sure ttold.h doesn't interfere.
  53    And don't try to use SIGIO yet.  */
  54 #include <sys/wait.h>
  55
  56 #ifdef emacs
  57 #include <sys/filio.h>
  58 #include <termio.h>
  59 #include <sys/ttold.h>
  60 #include <signal.h>
  61 #include <sys/stream.h>
  62 #include <sys/stropts.h>
  63 #include <sys/termios.h>
  64 #define BROKEN_SIGIO
  65 #endif
  66
  67 /* Some SVr4s don't define NSIG in sys/signal.h for ANSI environments;
  68    instead, there's a system variable _sys_nsig.  Unfortunately, we need the
  69    constant to dimension an array.  So wire in the appropriate value here.  */
  70 #define NSIG_MINIMUM 32
  71
  72 /* We can support this.  */
  73 #define CLASH_DETECTION
  74
  75 /* Define HAVE_PTYS if the system supports pty devices.  */
  76 #define HAVE_PTYS
  77
  78 /* It is possible to receive SIGCHLD when there are no children
  79    waiting, because a previous waitsys(2) cleaned up the carcass of child
  80    without clearing the SIGCHLD pending info.  So, use a non-blocking
  81    wait3 instead, which maps to waitpid(2) in SysVr4. */
  82 #define wait3(status, options, rusage) \
  83   waitpid ((pid_t) -1, (status), (options))
  84 #define WRETCODE(w) (w >> 8)
  85
  86 /* TIOCGPGRP is broken in SysVr4, so we can't send signals to PTY
  87    subprocesses the usual way.  But TIOCSIGNAL does work for PTYs, and
  88    this is all we need.  */
  89 #define TIOCSIGSEND TIOCSIGNAL
  90
  91 /* This change means that we don't loop through allocate_pty too many
  92    times in the (rare) event of a failure.  */
  93 #define FIRST_PTY_LETTER 'z'
  94
  95 /* This sets the name of the master side of the PTY.  */
  96 #define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");
  97
  98 /* Push various streams modules onto a PTY channel.  */
  99 #define SETUP_SLAVE_PTY \
 100   if (ioctl (xforkin, I_PUSH, "ptem") == -1)    \
 101     fatal ("ioctl I_PUSH ptem", errno);         \
 102   if (ioctl (xforkin, I_PUSH, "ldterm") == -1)  \
 103     fatal ("ioctl I_PUSH ldterm", errno);       \
 104   if (ioctl (xforkin, I_PUSH, "ttcompat") == -1) \
 105     fatal ("ioctl I_PUSH ttcompat", errno);
 106
 107 /* This definition was suggested for next release.  So give it a try.  */
 108 #define HAVE_SOCKETS
 109
 110 /* arch-tag: 1a0ed909-5faa-434b-b7c3-9d86c63d53a6
 111    (do not change this comment) */