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 /* This is now really the approach recommended by Autoconf.  If this
  31    doesn't cause trouble anywhere, remove the original code, which is
  32    #if'd out below.  */
  33
  34 #if 1
  35 #include <sys/types.h>
  36
  37 #ifdef HAVE_SYS_WAIT_H  /* We have sys/wait.h with POSIXoid definitions. */
  38 #include <sys/wait.h>
  39 #endif  /* !HAVE_SYS_WAIT_H */
  40
  41 #ifndef WCOREDUMP               /* not POSIX */
  42 #define WCOREDUMP(status) ((status) & 0x80)
  43 #endif
  44 #ifndef WEXITSTATUS
  45 #define WEXITSTATUS(status) (((status)  & 0xff00) >> 8)
  46 #endif
  47 #ifndef WIFEXITED
  48 #define WIFEXITED(status) (WTERMSIG(status) == 0)
  49 #endif
  50 #ifndef WIFSTOPPED
  51 #define WIFSTOPPED(status) (((status) & 0xff) == 0x7f)
  52 #endif
  53 #ifndef WIFSIGNALED
  54 #define WIFSIGNALED(status) (!WIFSTOPPED(status) && !WIFEXITED(status))
  55 #endif
  56 #ifndef WSTOPSIG
  57 #define WSTOPSIG(status) WEXITSTATUS(status)
  58 #endif
  59 #ifndef WTERMSIG
  60 #define WTERMSIG(status) ((status) & 0x7f)
  61 #endif
  62
  63 #undef WAITTYPE
  64 #define WAITTYPE int
  65 #undef WRETCODE
  66 #define WRETCODE(status) WEXITSTATUS (status)
  67
  68 #else  /* 0 */
  69
  70 #ifndef WAITTYPE
  71
  72 #ifdef WAIT_USE_INT
  73 /* Some systems have  union wait  in their header, but we should use
  74    int regardless of that.  */
  75 #include <sys/wait.h>
  76 #define WAITTYPE int
  77 #define WRETCODE(w) WEXITSTATUS (w)
  78
  79 #else /* not WAIT_USE_INT */
  80
  81 #if (!defined (BSD_SYSTEM) && !defined (UNIPLUS) && !defined (STRIDE) && !(defined (HPUX) && !defined (NOMULTIPLEJOBS)) && !defined (HAVE_WAIT_HEADER))
  82 #define WAITTYPE int
  83 #define WIFSTOPPED(w) ((w&0377) == 0177)
  84 #define WIFSIGNALED(w) ((w&0377) != 0177 && (w&~0377) == 0)
  85 #define WIFEXITED(w) ((w&0377) == 0)
  86 #define WRETCODE(w) (w >> 8)
  87 #define WSTOPSIG(w) (w >> 8)
  88 #define WTERMSIG(w) (w & 0177)
  89 #ifndef WCOREDUMP
  90 #define WCOREDUMP(w) ((w&0200) != 0)
  91 #endif
  92
  93 #else
  94
  95 #ifdef BSD4_1
  96 #include <wait.h>
  97 #else
  98 #include <sys/wait.h>
  99 #endif /* not BSD 4.1 */
 100
 101 #define WAITTYPE union wait
 102 #define WRETCODE(w) w.w_retcode
 103 #undef WCOREDUMP                /* Later BSDs define this name differently.  */
 104 #define WCOREDUMP(w) w.w_coredump
 105
 106 #if defined (HPUX) || defined (convex)
 107 /* HPUX version 7 has broken definitions of these.  */
 108 /* pvogel@convex.com says the convex does too.  */
 109 #undef WTERMSIG
 110 #undef WSTOPSIG
 111 #undef WIFSTOPPED
 112 #undef WIFSIGNALED
 113 #undef WIFEXITED
 114 #endif /* HPUX | convex */
 115
 116 #ifndef WTERMSIG
 117 #define WTERMSIG(w) w.w_termsig
 118 #endif
 119 #ifndef WSTOPSIG
 120 #define WSTOPSIG(w) w.w_stopsig
 121 #endif
 122 #ifndef WIFSTOPPED
 123 #define WIFSTOPPED(w) (WTERMSIG (w) == 0177)
 124 #endif
 125 #ifndef WIFSIGNALED
 126 #define WIFSIGNALED(w) (WTERMSIG (w) != 0177 && (WSTOPSIG (w)) == 0)
 127 #endif
 128 #ifndef WIFEXITED
 129 #define WIFEXITED(w) (WTERMSIG (w) == 0)
 130 #endif
 131 #endif /* BSD_SYSTEM || UNIPLUS || STRIDE || HPUX */
 132 #endif /* not WAIT_USE_INT */
 133 #endif /* no WAITTYPE */
 134
 135 #endif /* 0 */
 136
 137 #else /* VMS */
 138
 139 #define WAITTYPE int
 140 #define WIFSTOPPED(w) 0
 141 #define WIFSIGNALED(w) 0
 142 #define WIFEXITED(w) ((w) != -1)
 143 #define WRETCODE(w) (w)
 144 #define WSTOPSIG(w) (w)
 145 #define WCOREDUMP(w) 0
 146 #define WTERMSIG(w) (w)
 147 #include <ssdef.h>
 148 #include <iodef.h>
 149 #include <clidef.h>
 150 #include "vmsproc.h"
 151
 152 #endif /* VMS */
 153
 154 #endif /* EMACS_SYSWAIT_H */