code.delx.au - gnu-emacs/blob - src/syswait.h

   1 /* Define wait system call interface for Emacs.
   2    Copyright (C) 1993 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /* Define the structure that the wait system call stores.
  21    On many systems, there is a structure defined for this.
  22    But on vanilla-ish USG systems there is not.  */
  23
  24 #ifndef VMS
  25 #ifndef WAITTYPE
  26 #if (!defined (BSD) && !defined (UNIPLUS) && !defined (STRIDE) && !(defined (HPUX) && !defined (NOMULTIPLEJOBS)) && !defined (HAVE_WAIT_HEADER)) || defined (LINUX)
  27 #define WAITTYPE int
  28 #define WIFSTOPPED(w) ((w&0377) == 0177)
  29 #define WIFSIGNALED(w) ((w&0377) != 0177 && (w&~0377) == 0)
  30 #define WIFEXITED(w) ((w&0377) == 0)
  31 #define WRETCODE(w) (w >> 8)
  32 #define WSTOPSIG(w) (w >> 8)
  33 #define WTERMSIG(w) (w & 0377)
  34 #ifndef WCOREDUMP
  35 #define WCOREDUMP(w) ((w&0200) != 0)
  36 #endif
  37 #else
  38 #ifdef BSD4_1
  39 #include <wait.h>
  40 #else
  41 #include <sys/wait.h>
  42 #endif /* not BSD 4.1 */
  43
  44 #define WAITTYPE union wait
  45 #define WRETCODE(w) w.w_retcode
  46 #define WCOREDUMP(w) w.w_coredump
  47
  48 #if defined (HPUX) || defined (convex)
  49 /* HPUX version 7 has broken definitions of these.  */
  50 /* pvogel@convex.com says the convex does too.  */
  51 #undef WTERMSIG
  52 #undef WSTOPSIG
  53 #undef WIFSTOPPED
  54 #undef WIFSIGNALED
  55 #undef WIFEXITED
  56 #endif /* HPUX | convex */
  57
  58 #ifndef WTERMSIG
  59 #define WTERMSIG(w) w.w_termsig
  60 #endif
  61 #ifndef WSTOPSIG
  62 #define WSTOPSIG(w) w.w_stopsig
  63 #endif
  64 #ifndef WIFSTOPPED
  65 #define WIFSTOPPED(w) (WTERMSIG (w) == 0177)
  66 #endif
  67 #ifndef WIFSIGNALED
  68 #define WIFSIGNALED(w) (WTERMSIG (w) != 0177 && (WSTOPSIG (w)) == 0)
  69 #endif
  70 #ifndef WIFEXITED
  71 #define WIFEXITED(w) (WTERMSIG (w) == 0)
  72 #endif
  73 #endif /* BSD or UNIPLUS or STRIDE */
  74 #endif /* no WAITTYPE */
  75 #else /* VMS */
  76 #define WAITTYPE int
  77 #define WIFSTOPPED(w) 0
  78 #define WIFSIGNALED(w) 0
  79 #define WIFEXITED(w) ((w) != -1)
  80 #define WRETCODE(w) (w)
  81 #define WSTOPSIG(w) (w)
  82 #define WCOREDUMP(w) 0
  83 #define WTERMSIG(w) (w)
  84 #include <ssdef.h>
  85 #include <iodef.h>
  86 #include <clidef.h>
  87 #include "vmsproc.h"
  88 #endif /* VMS */