src/syswait.h

   1 /* Define wait system call interface for Emacs.
   2    Copyright (C) 1993, 1994, 1995, 2000, 2001, 2002, 2003, 2004,
   3                  2005, 2006, 2007  Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs; see the file COPYING.  If not, write to
  19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22 /* Define the structure that the wait system call stores.
  23    On many systems, there is a structure defined for this.
  24    But on vanilla-ish USG systems there is not.  */
  25
  26 #ifndef EMACS_SYSWAIT_H
  27 #define EMACS_SYSWAIT_H
  28
  29 #ifndef VMS
  30
  31 /* This is now really the approach recommended by Autoconf.  If this
  32    doesn't cause trouble anywhere, remove the original code, which is
  33    #if'd out below.  */
  34
  35 #if 1
  36 #include <sys/types.h>
  37
  38 #ifdef HAVE_SYS_WAIT_H  /* We have sys/wait.h with POSIXoid definitions. */
  39 #include <sys/wait.h>
  40 #endif  /* !HAVE_SYS_WAIT_H */
  41
  42 #ifndef WCOREDUMP               /* not POSIX */
  43 #define WCOREDUMP(status) ((status) & 0x80)
  44 #endif
  45 #ifndef WEXITSTATUS
  46 #define WEXITSTATUS(status) (((status)  & 0xff00) >> 8)
  47 #endif
  48 #ifndef WIFEXITED
  49 #define WIFEXITED(status) (WTERMSIG(status) == 0)
  50 #endif
  51 #ifndef WIFSTOPPED
  52 #define WIFSTOPPED(status) (((status) & 0xff) == 0x7f)
  53 #endif
  54 #ifndef WIFSIGNALED
  55 #define WIFSIGNALED(status) (!WIFSTOPPED(status) && !WIFEXITED(status))
  56 #endif
  57 #ifndef WSTOPSIG
  58 #define WSTOPSIG(status) WEXITSTATUS(status)
  59 #endif
  60 #ifndef WTERMSIG
  61 #define WTERMSIG(status) ((status) & 0x7f)
  62 #endif
  63
  64 #undef WAITTYPE
  65 #define WAITTYPE int
  66 #undef WRETCODE
  67 #define WRETCODE(status) WEXITSTATUS (status)
  68
  69 #else  /* 0 */
  70
  71 #ifndef WAITTYPE
  72
  73 #ifdef WAIT_USE_INT
  74 /* Some systems have  union wait  in their header, but we should use
  75    int regardless of that.  */
  76 #include <sys/wait.h>
  77 #define WAITTYPE int
  78 #define WRETCODE(w) WEXITSTATUS (w)
  79
  80 #else /* not WAIT_USE_INT */
  81
  82 #if (!defined (BSD_SYSTEM) && !defined (UNIPLUS) && !defined (STRIDE) && !(defined (HPUX) && !defined (NOMULTIPLEJOBS)) && !defined (HAVE_WAIT_HEADER))
  83 #define WAITTYPE int
  84 #define WIFSTOPPED(w) ((w&0377) == 0177)
  85 #define WIFSIGNALED(w) ((w&0377) != 0177 && (w&~0377) == 0)
  86 #define WIFEXITED(w) ((w&0377) == 0)
  87 #define WRETCODE(w) (w >> 8)
  88 #define WSTOPSIG(w) (w >> 8)
  89 #define WTERMSIG(w) (w & 0177)
  90 #ifndef WCOREDUMP
  91 #define WCOREDUMP(w) ((w&0200) != 0)
  92 #endif
  93
  94 #else
  95
  96 #ifdef BSD4_1
  97 #include <wait.h>
  98 #else
  99 #include <sys/wait.h>
 100 #endif /* not BSD 4.1 */
 101
 102 #define WAITTYPE union wait
 103 #define WRETCODE(w) w.w_retcode
 104 #undef WCOREDUMP                /* Later BSDs define this name differently.  */
 105 #define WCOREDUMP(w) w.w_coredump
 106
 107 #if defined (HPUX) || defined (convex)
 108 /* HPUX version 7 has broken definitions of these.  */
 109 /* pvogel@convex.com says the convex does too.  */
 110 #undef WTERMSIG
 111 #undef WSTOPSIG
 112 #undef WIFSTOPPED
 113 #undef WIFSIGNALED
 114 #undef WIFEXITED
 115 #endif /* HPUX | convex */
 116
 117 #ifndef WTERMSIG
 118 #define WTERMSIG(w) w.w_termsig
 119 #endif
 120 #ifndef WSTOPSIG
 121 #define WSTOPSIG(w) w.w_stopsig
 122 #endif
 123 #ifndef WIFSTOPPED
 124 #define WIFSTOPPED(w) (WTERMSIG (w) == 0177)
 125 #endif
 126 #ifndef WIFSIGNALED
 127 #define WIFSIGNALED(w) (WTERMSIG (w) != 0177 && (WSTOPSIG (w)) == 0)
 128 #endif
 129 #ifndef WIFEXITED
 130 #define WIFEXITED(w) (WTERMSIG (w) == 0)
 131 #endif
 132 #endif /* BSD_SYSTEM || UNIPLUS || STRIDE || HPUX */
 133 #endif /* not WAIT_USE_INT */
 134 #endif /* no WAITTYPE */
 135
 136 #endif /* 0 */
 137
 138 #else /* VMS */
 139
 140 #define WAITTYPE int
 141 #define WIFSTOPPED(w) 0
 142 #define WIFSIGNALED(w) 0
 143 #define WIFEXITED(w) ((w) != -1)
 144 #define WRETCODE(w) (w)
 145 #define WSTOPSIG(w) (w)
 146 #define WCOREDUMP(w) 0
 147 #define WTERMSIG(w) (w)
 148 #include <ssdef.h>
 149 #include <iodef.h>
 150 #include <clidef.h>
 151 #include "vmsproc.h"
 152
 153 #endif /* VMS */
 154
 155 #endif /* EMACS_SYSWAIT_H */
 156
 157 /* arch-tag: 7e5d9719-ec66-4b6f-89bb-563eea16a899
 158    (do not change this comment) */