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, 1999-2012  Free Software Foundation, Inc.
   4
   5 Written by James Van Artsdalen of Dell Computer Corp. james@bigtex.cactus.org.
   6 Subsequently improved for Dell 2.2 by Eric S. Raymond <esr@snark.thyrsus.com>.
   7
   8 This file is part of GNU Emacs.
   9
  10 GNU Emacs is free software: you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation, either version 3 of the License, or
  13 (at your option) any later version.
  14
  15 GNU Emacs is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  22
  23 /* Get FIONREAD from <sys/filio.h>.  Get <sys/ttold.h> to get struct tchars.
  24    But get <termio.h> first to make sure ttold.h doesn't interfere.  */
  25 #include <sys/wait.h>
  26
  27 #ifdef emacs
  28 #include <sys/filio.h>
  29 #include <termio.h>
  30 #include <sys/ttold.h>
  31 #include <signal.h>
  32 #include <sys/stream.h>
  33 #include <sys/stropts.h>
  34 #include <sys/termios.h>
  35 #endif
  36
  37 /* It is possible to receive SIGCHLD when there are no children
  38    waiting, because a previous waitsys(2) cleaned up the carcass of child
  39    without clearing the SIGCHLD pending info.  So, use a non-blocking
  40    wait3 instead, which maps to waitpid(2) in SysVr4. */
  41 #define wait3(status, options, rusage) \
  42   waitpid ((pid_t) -1, (status), (options))
  43 #define WRETCODE(w) (w >> 8)
  44
  45 /* TIOCGPGRP is broken in SysVr4, so we can't send signals to PTY
  46    subprocesses the usual way.  But TIOCSIGNAL does work for PTYs, and
  47    this is all we need.  */
  48 #define TIOCSIGSEND TIOCSIGNAL
  49