src/syswait.h

   1 /* Define wait system call interface for Emacs.
   2    Copyright (C) 1993, 1994, 1995, 2000 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 EMACS_SYSWAIT_H
  26 #define EMACS_SYSWAIT_H
  27
  28 #ifndef VMS
  29
  30 /* Try the approach recommended by autoconf.  If this doesn't cause
  31    trouble anywhere, remove the original code, which is #if'd out
  32    below.  */
  33
  34 #if 1
  35 #undef WAITTYPE
  36 #define WAITTYPE int
  37 #define WRETCODE(w) WEXITSTATUS (w)
  38
  39 #include <sys/types.h>
  40 #if HAVE_SYS_WAIT_H
  41 #include <sys/wait.h>
  42 #endif
  43
  44 #if defined (HPUX) || defined (convex)
  45 /* HPUX version 7 has broken definitions of these.  */
  46 /* pvogel@convex.com says the convex does too.  */
  47 #undef WTERMSIG
  48 #undef WSTOPSIG
  49 #undef WIFSTOPPED
  50 #undef WIFSIGNALED
  51 #undef WIFEXITED
  52 #endif /* HPUX || convex */
  53
  54 #ifndef WEXITSTATUS
  55 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
  56 #endif
  57 #ifndef WIFEXITED
  58 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
  59 #endif
  60 #ifndef WIFSTOPPED
  61 #define WIFSTOPPED(w) ((w&0377) == 0177)
  62 #endif
  63 #ifndef WIFSIGNALED
  64 #define WIFSIGNALED(w) ((w&0377) != 0177 && (w&~0377) == 0)
  65 #endif
  66 #ifndef WIFEXITED
  67 #define WIFEXITED(w) ((w&0377) == 0)
  68 #endif
  69 #ifndef WRETCODE
  70 #define WRETCODE(w) (w >> 8)
  71 #endif
  72 #ifndef WSTOPSIG
  73 #define WSTOPSIG(w) (w >> 8)
  74 #endif
  75 #ifndef WTERMSIG
  76 #define WTERMSIG(w) (w & 0377)
  77 #endif
  78 #ifndef WCOREDUMP
  79 #define WCOREDUMP(w) ((w&0200) != 0)
  80 #endif
  81
  82 #else  /* !1 */
  83
  84 #ifndef WAITTYPE
  85
  86 #ifdef WAIT_USE_INT
  87 /* Some systems have  union wait  in their header, but we should use
  88    int regardless of that.  */
  89 #include <sys/wait.h>
  90 #define WAITTYPE int
  91 #define WRETCODE(w) WEXITSTATUS (w)
  92
  93 #else /* not WAIT_USE_INT */
  94
  95 #if (!defined (BSD_SYSTEM) && !defined (UNIPLUS) && !defined (STRIDE) && !(defined (HPUX) && !defined (NOMULTIPLEJOBS)) && !defined (HAVE_WAIT_HEADER))
  96 #define WAITTYPE int
  97 #define WIFSTOPPED(w) ((w&0377) == 0177)
  98 #define WIFSIGNALED(w) ((w&0377) != 0177 && (w&~0377) == 0)
  99 #define WIFEXITED(w) ((w&0377) == 0)
 100 #define WRETCODE(w) (w >> 8)
 101 #define WSTOPSIG(w) (w >> 8)
 102 #define WTERMSIG(w) (w & 0377)
 103 #ifndef WCOREDUMP
 104 #define WCOREDUMP(w) ((w&0200) != 0)
 105 #endif
 106
 107 #else
 108
 109 #ifdef BSD4_1
 110 #include <wait.h>
 111 #else
 112 #include <sys/wait.h>
 113 #endif /* not BSD 4.1 */
 114
 115 #define WAITTYPE union wait
 116 #define WRETCODE(w) w.w_retcode
 117 #undef WCOREDUMP                /* Later BSDs define this name differently.  */
 118 #define WCOREDUMP(w) w.w_coredump
 119
 120 #if defined (HPUX) || defined (convex)
 121 /* HPUX version 7 has broken definitions of these.  */
 122 /* pvogel@convex.com says the convex does too.  */
 123 #undef WTERMSIG
 124 #undef WSTOPSIG
 125 #undef WIFSTOPPED
 126 #undef WIFSIGNALED
 127 #undef WIFEXITED
 128 #endif /* HPUX | convex */
 129
 130 #ifndef WTERMSIG
 131 #define WTERMSIG(w) w.w_termsig
 132 #endif
 133 #ifndef WSTOPSIG
 134 #define WSTOPSIG(w) w.w_stopsig
 135 #endif
 136 #ifndef WIFSTOPPED
 137 #define WIFSTOPPED(w) (WTERMSIG (w) == 0177)
 138 #endif
 139 #ifndef WIFSIGNALED
 140 #define WIFSIGNALED(w) (WTERMSIG (w) != 0177 && (WSTOPSIG (w)) == 0)
 141 #endif
 142 #ifndef WIFEXITED
 143 #define WIFEXITED(w) (WTERMSIG (w) == 0)
 144 #endif
 145 #endif /* BSD_SYSTEM || UNIPLUS || STRIDE || HPUX */
 146 #endif /* not WAIT_USE_INT */
 147 #endif /* no WAITTYPE */
 148
 149 #endif /* 1 */
 150
 151 #else /* VMS */
 152
 153 #define WAITTYPE int
 154 #define WIFSTOPPED(w) 0
 155 #define WIFSIGNALED(w) 0
 156 #define WIFEXITED(w) ((w) != -1)
 157 #define WRETCODE(w) (w)
 158 #define WSTOPSIG(w) (w)
 159 #define WCOREDUMP(w) 0
 160 #define WTERMSIG(w) (w)
 161 #include <ssdef.h>
 162 #include <iodef.h>
 163 #include <clidef.h>
 164 #include "vmsproc.h"
 165
 166 #endif /* VMS */
 167
 168 #endif /* EMACS_SYSWAIT_H */