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, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 /* Define the structure that the wait system call stores.
  22    On many systems, there is a structure defined for this.
  23    But on vanilla-ish USG systems there is not.  */
  24
  25 #ifndef VMS
  26 #ifndef WAITTYPE
  27
  28 #ifdef WAIT_USE_INT
  29 /* Some systems have  union wait  in their header, but we should use
  30    int regardless of that.  */
  31 #include <sys/wait.h>
  32 #define WAITTYPE int
  33 #define WRETCODE(w) WEXITSTATUS (w)
  34
  35 #else /* not WAIT_USE_INT */
  36
  37 #if (!defined (BSD) && !defined (UNIPLUS) && !defined (STRIDE) && !(defined (HPUX) && !defined (NOMULTIPLEJOBS)) && !defined (HAVE_WAIT_HEADER))
  38 #define WAITTYPE int
  39 #define WIFSTOPPED(w) ((w&0377) == 0177)
  40 #define WIFSIGNALED(w) ((w&0377) != 0177 && (w&~0377) == 0)
  41 #define WIFEXITED(w) ((w&0377) == 0)
  42 #define WRETCODE(w) (w >> 8)
  43 #define WSTOPSIG(w) (w >> 8)
  44 #define WTERMSIG(w) (w & 0377)
  45 #ifndef WCOREDUMP
  46 #define WCOREDUMP(w) ((w&0200) != 0)
  47 #endif
  48
  49 #else
  50
  51 #ifdef BSD4_1
  52 #include <wait.h>
  53 #else
  54 #include <sys/wait.h>
  55 #endif /* not BSD 4.1 */
  56
  57 #define WAITTYPE union wait
  58 #define WRETCODE(w) w.w_retcode
  59 #undef WCOREDUMP                /* Later BSDs define this name differently.  */
  60 #define WCOREDUMP(w) w.w_coredump
  61
  62 #if defined (HPUX) || defined (convex)
  63 /* HPUX version 7 has broken definitions of these.  */
  64 /* pvogel@convex.com says the convex does too.  */
  65 #undef WTERMSIG
  66 #undef WSTOPSIG
  67 #undef WIFSTOPPED
  68 #undef WIFSIGNALED
  69 #undef WIFEXITED
  70 #endif /* HPUX | convex */
  71
  72 #ifndef WTERMSIG
  73 #define WTERMSIG(w) w.w_termsig
  74 #endif
  75 #ifndef WSTOPSIG
  76 #define WSTOPSIG(w) w.w_stopsig
  77 #endif
  78 #ifndef WIFSTOPPED
  79 #define WIFSTOPPED(w) (WTERMSIG (w) == 0177)
  80 #endif
  81 #ifndef WIFSIGNALED
  82 #define WIFSIGNALED(w) (WTERMSIG (w) != 0177 && (WSTOPSIG (w)) == 0)
  83 #endif
  84 #ifndef WIFEXITED
  85 #define WIFEXITED(w) (WTERMSIG (w) == 0)
  86 #endif
  87 #endif /* BSD or UNIPLUS or STRIDE */
  88 #endif /* not WAIT_USE_INT */
  89 #endif /* no WAITTYPE */
  90
  91 #else /* VMS */
  92
  93 #define WAITTYPE int
  94 #define WIFSTOPPED(w) 0
  95 #define WIFSIGNALED(w) 0
  96 #define WIFEXITED(w) ((w) != -1)
  97 #define WRETCODE(w) (w)
  98 #define WSTOPSIG(w) (w)
  99 #define WCOREDUMP(w) 0
 100 #define WTERMSIG(w) (w)
 101 #include <ssdef.h>
 102 #include <iodef.h>
 103 #include <clidef.h>
 104 #include "vmsproc.h"
 105
 106 #endif /* VMS */