src/syswait.h

   1 /* Define wait system call interface for Emacs.
   2    Copyright (C) 1993, 1994, 1995 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
  27 #ifdef WAIT_USE_INT
  28 /* Some systems have  union wait  in their header, but we should use
  29    int regardless of that.  */
  30 #include <sys/wait.h>
  31 #define WAITTYPE int
  32 #define WRETCODE(w) WEXITSTATUS (w)
  33
  34 #else /* not WAIT_USE_INT */
  35
  36 #if (!defined (BSD) && !defined (UNIPLUS) && !defined (STRIDE) && !(defined (HPUX) && !defined (NOMULTIPLEJOBS)) && !defined (HAVE_WAIT_HEADER)) || defined (LINUX)
  37 #define WAITTYPE int
  38 #define WIFSTOPPED(w) ((w&0377) == 0177)
  39 #define WIFSIGNALED(w) ((w&0377) != 0177 && (w&~0377) == 0)
  40 #define WIFEXITED(w) ((w&0377) == 0)
  41 #define WRETCODE(w) (w >> 8)
  42 #define WSTOPSIG(w) (w >> 8)
  43 #define WTERMSIG(w) (w & 0377)
  44 #ifndef WCOREDUMP
  45 #define WCOREDUMP(w) ((w&0200) != 0)
  46 #endif
  47
  48 #else
  49
  50 #ifdef BSD4_1
  51 #include <wait.h>
  52 #else
  53 #include <sys/wait.h>
  54 #endif /* not BSD 4.1 */
  55
  56 #define WAITTYPE union wait
  57 #define WRETCODE(w) w.w_retcode
  58 #undef WCOREDUMP                /* Later BSDs define this name differently.  */
  59 #define WCOREDUMP(w) w.w_coredump
  60
  61 #if defined (HPUX) || defined (convex)
  62 /* HPUX version 7 has broken definitions of these.  */
  63 /* pvogel@convex.com says the convex does too.  */
  64 #undef WTERMSIG
  65 #undef WSTOPSIG
  66 #undef WIFSTOPPED
  67 #undef WIFSIGNALED
  68 #undef WIFEXITED
  69 #endif /* HPUX | convex */
  70
  71 #ifndef WTERMSIG
  72 #define WTERMSIG(w) w.w_termsig
  73 #endif
  74 #ifndef WSTOPSIG
  75 #define WSTOPSIG(w) w.w_stopsig
  76 #endif
  77 #ifndef WIFSTOPPED
  78 #define WIFSTOPPED(w) (WTERMSIG (w) == 0177)
  79 #endif
  80 #ifndef WIFSIGNALED
  81 #define WIFSIGNALED(w) (WTERMSIG (w) != 0177 && (WSTOPSIG (w)) == 0)
  82 #endif
  83 #ifndef WIFEXITED
  84 #define WIFEXITED(w) (WTERMSIG (w) == 0)
  85 #endif
  86 #endif /* BSD or UNIPLUS or STRIDE */
  87 #endif /* not WAIT_USE_INT */
  88 #endif /* no WAITTYPE */
  89
  90 #else /* VMS */
  91
  92 #define WAITTYPE int
  93 #define WIFSTOPPED(w) 0
  94 #define WIFSIGNALED(w) 0
  95 #define WIFEXITED(w) ((w) != -1)
  96 #define WRETCODE(w) (w)
  97 #define WSTOPSIG(w) (w)
  98 #define WCOREDUMP(w) 0
  99 #define WTERMSIG(w) (w)
 100 #include <ssdef.h>
 101 #include <iodef.h>
 102 #include <clidef.h>
 103 #include "vmsproc.h"
 104
 105 #endif /* VMS */