src/s/usg5-4.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 /* Define HAVE_TERMIO if the system provides sysV-style ioctls
  35    for terminal control.  */
  36 #define HAVE_TERMIO
  37
  38 /* Define SYSV_SYSTEM_DIR to use the V.3 getdents/readir library
  39    functions. Almost, but not quite the same as the 4.2 functions.  */
  40 #define SYSV_SYSTEM_DIR
  41
  42 /* The file containing the kernel's symbol table is called /unix.  */
  43 #define KERNEL_FILE "/unix"
  44
  45 /* The kernel symbol where the load average is found is named avenrun.  */
  46 #define LDAV_SYMBOL "avenrun"
  47
  48 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
  49    but they will run slower.  */
  50 #define _setjmp setjmp
  51 #define _longjmp longjmp
  52
  53 /* On USG systems these have different names.  */
  54 #ifndef HAVE_INDEX
  55 #define index strchr
  56 #endif /* ! defined (HAVE_INDEX) */
  57 #ifndef HAVE_RINDEX
  58 #define rindex strrchr
  59 #endif /* ! defined (HAVE_RINDEX) */
  60
  61 /* The docs for system V/386 suggest v.3 has sigpause, so let's try it.  */
  62 #define HAVE_SYSV_SIGPAUSE
  63
  64 /* If we're using the System V X port, BSD bstring functions will be handy.  */
  65 #ifdef HAVE_X_WINDOWS
  66 #define BSTRING
  67 #endif /* HAVE_X_WINDOWS */
  68
  69 /* On USG systems signal handlers return void.  */
  70 #define SIGTYPE void
  71
  72 /* Undump with ELF.  */
  73 #undef COFF
  74
  75 #define UNEXEC unexelf.o
  76
  77 /* Get FIONREAD from <sys/filio.h>.  Get <sys/ttold.h> to get struct tchars.
  78    But get <termio.h> first to make sure ttold.h doesn't interfere.
  79    And don't try to use SIGIO yet.  */
  80 #ifndef NOT_C_CODE
  81 #include <sys/wait.h>
  82 #endif
  83
  84 #ifdef emacs
  85 #include <sys/filio.h>
  86 #include <termio.h>
  87 #include <sys/ttold.h>
  88 #include <signal.h>
  89 #include <sys/stream.h>
  90 #include <sys/stropts.h>
  91 #include <sys/termios.h>
  92 #define BROKEN_SIGIO
  93 #endif
  94
  95 /* Some SVr4s don't define NSIG in sys/signal.h for ANSI environments;
  96    instead, there's a system variable _sys_nsig.  Unfortunately, we need the
  97    constant to dimension an array.  So wire in the appropriate value here.  */
  98 #define NSIG_MINIMUM 32
  99
 100 /* We can support this.  */
 101 #define CLASH_DETECTION
 102
 103 /* Define HAVE_PTYS if the system supports pty devices.  */
 104 #define HAVE_PTYS
 105 #define HAVE_TERMIOS
 106
 107 /* It is possible to receive SIGCHLD when there are no children
 108    waiting, because a previous waitsys(2) cleaned up the carcass of child
 109    without clearing the SIGCHLD pending info.  So, use a non-blocking
 110    wait3 instead, which maps to waitpid(2) in SysVr4. */
 111 #define wait3(status, options, rusage) \
 112   waitpid ((pid_t) -1, (status), (options))
 113 #define WRETCODE(w) (w >> 8)
 114
 115 /* TIOCGPGRP is broken in SysVr4, so we can't send signals to PTY
 116    subprocesses the usual way.  But TIOCSIGNAL does work for PTYs, and
 117    this is all we need.  */
 118 #define TIOCSIGSEND TIOCSIGNAL
 119
 120 /* This change means that we don't loop through allocate_pty too many
 121    times in the (rare) event of a failure.  */
 122 #define FIRST_PTY_LETTER 'z'
 123
 124 /* This sets the name of the master side of the PTY.  */
 125 #define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");
 126
 127 /* Push various streams modules onto a PTY channel.  */
 128 #define SETUP_SLAVE_PTY \
 129   if (ioctl (xforkin, I_PUSH, "ptem") == -1)    \
 130     fatal ("ioctl I_PUSH ptem", errno);         \
 131   if (ioctl (xforkin, I_PUSH, "ldterm") == -1)  \
 132     fatal ("ioctl I_PUSH ldterm", errno);       \
 133   if (ioctl (xforkin, I_PUSH, "ttcompat") == -1) \
 134     fatal ("ioctl I_PUSH ttcompat", errno);
 135
 136 /* This definition was suggested for next release.  So give it a try.  */
 137 #define HAVE_SOCKETS
 138
 139 /* arch-tag: 1a0ed909-5faa-434b-b7c3-9d86c63d53a6
 140    (do not change this comment) */