code.delx.au - gnu-emacs/blob - 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, 2008  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 3 of the License, or
  10 (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.  */
  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 EMACS_SYSWAIT_H
  25 #define EMACS_SYSWAIT_H
  26
  27 #ifndef VMS
  28
  29 /* This is now really the approach recommended by Autoconf.  If this
  30    doesn't cause trouble anywhere, remove the original code, which is
  31    #if'd out below.  */
  32
  33 #if 1
  34 #include <sys/types.h>
  35
  36 #ifdef HAVE_SYS_WAIT_H  /* We have sys/wait.h with POSIXoid definitions. */
  37 #include <sys/wait.h>
  38 #endif  /* !HAVE_SYS_WAIT_H */
  39
  40 #ifndef WCOREDUMP               /* not POSIX */
  41 #define WCOREDUMP(status) ((status) & 0x80)
  42 #endif
  43 #ifndef WEXITSTATUS
  44 #define WEXITSTATUS(status) (((status)  & 0xff00) >> 8)
  45 #endif
  46 #ifndef WIFEXITED
  47 #define WIFEXITED(status) (WTERMSIG(status) == 0)
  48 #endif
  49 #ifndef WIFSTOPPED
  50 #define WIFSTOPPED(status) (((status) & 0xff) == 0x7f)
  51 #endif
  52 #ifndef WIFSIGNALED
  53 #define WIFSIGNALED(status) (!WIFSTOPPED(status) && !WIFEXITED(status))
  54 #endif
  55 #ifndef WSTOPSIG
  56 #define WSTOPSIG(status) WEXITSTATUS(status)
  57 #endif
  58 #ifndef WTERMSIG
  59 #define WTERMSIG(status) ((status) & 0x7f)
  60 #endif
  61
  62 #undef WAITTYPE
  63 #define WAITTYPE int
  64 #undef WRETCODE
  65 #define WRETCODE(status) WEXITSTATUS (status)
  66
  67 #else  /* 0 */
  68
  69 #ifndef WAITTYPE
  70
  71 #ifdef WAIT_USE_INT
  72 /* Some systems have  union wait  in their header, but we should use
  73    int regardless of that.  */
  74 #include <sys/wait.h>
  75 #define WAITTYPE int
  76 #define WRETCODE(w) WEXITSTATUS (w)
  77
  78 #else /* not WAIT_USE_INT */
  79
  80 #if (!defined (BSD_SYSTEM) && !(defined (HPUX) && !defined (NOMULTIPLEJOBS)) && !defined (HAVE_WAIT_HEADER))
  81 #define WAITTYPE int
  82 #define WIFSTOPPED(w) ((w&0377) == 0177)
  83 #define WIFSIGNALED(w) ((w&0377) != 0177 && (w&~0377) == 0)
  84 #define WIFEXITED(w) ((w&0377) == 0)
  85 #define WRETCODE(w) (w >> 8)
  86 #define WSTOPSIG(w) (w >> 8)
  87 #define WTERMSIG(w) (w & 0177)
  88 #ifndef WCOREDUMP
  89 #define WCOREDUMP(w) ((w&0200) != 0)
  90 #endif
  91
  92 #else
  93
  94 #ifdef BSD4_1
  95 #include <wait.h>
  96 #else
  97 #include <sys/wait.h>
  98 #endif /* not BSD 4.1 */
  99
 100 #define WAITTYPE union wait
 101 #define WRETCODE(w) w.w_retcode
 102 #undef WCOREDUMP                /* Later BSDs define this name differently.  */
 103 #define WCOREDUMP(w) w.w_coredump
 104
 105 #if defined (HPUX) || defined (convex)
 106 /* HPUX version 7 has broken definitions of these.  */
 107 /* pvogel@convex.com says the convex does too.  */
 108 #undef WTERMSIG
 109 #undef WSTOPSIG
 110 #undef WIFSTOPPED
 111 #undef WIFSIGNALED
 112 #undef WIFEXITED
 113 #endif /* HPUX | convex */
 114
 115 #ifndef WTERMSIG
 116 #define WTERMSIG(w) w.w_termsig
 117 #endif
 118 #ifndef WSTOPSIG
 119 #define WSTOPSIG(w) w.w_stopsig
 120 #endif
 121 #ifndef WIFSTOPPED
 122 #define WIFSTOPPED(w) (WTERMSIG (w) == 0177)
 123 #endif
 124 #ifndef WIFSIGNALED
 125 #define WIFSIGNALED(w) (WTERMSIG (w) != 0177 && (WSTOPSIG (w)) == 0)
 126 #endif
 127 #ifndef WIFEXITED
 128 #define WIFEXITED(w) (WTERMSIG (w) == 0)
 129 #endif
 130 #endif /* BSD_SYSTEM || HPUX */
 131 #endif /* not WAIT_USE_INT */
 132 #endif /* no WAITTYPE */
 133
 134 #endif /* 0 */
 135
 136 #else /* VMS */
 137
 138 #define WAITTYPE int
 139 #define WIFSTOPPED(w) 0
 140 #define WIFSIGNALED(w) 0
 141 #define WIFEXITED(w) ((w) != -1)
 142 #define WRETCODE(w) (w)
 143 #define WSTOPSIG(w) (w)
 144 #define WCOREDUMP(w) 0
 145 #define WTERMSIG(w) (w)
 146 #include <ssdef.h>
 147 #include <iodef.h>
 148 #include <clidef.h>
 149 #include "vmsproc.h"
 150
 151 #endif /* VMS */
 152
 153 #endif /* EMACS_SYSWAIT_H */
 154
 155 /* arch-tag: 7e5d9719-ec66-4b6f-89bb-563eea16a899
 156    (do not change this comment) */