code.delx.au - gnu-emacs/blob - 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 #include <sys/types.h>
  36
  37 /* Old code included a comment that HPUX version 7 has broken
  38    definitions of some of the macros and `the convex' does too.
  39    HAVE_SYS_WAIT_H probably won't be defined on them if they still get
  40    used, but for safety...  -- fx */
  41 /* ISC 4.1 doesn't have wait3, but does have sys/wait.h.  */
  42 #if (defined(HPUX) && !defined(HPUX8)) || defined(convex) || defined(ISC4_1)
  43 #undef HAVE_SYS_WAIT_H
  44 #endif
  45
  46 #if defined HAVE_SYS_WAIT_H     /* We have sys/wait.h with POSIXoid
  47                                    definitions. */
  48
  49 #include <sys/wait.h>
  50 #ifndef WCOREDUMP               /* not POSIX */
  51 #define WCOREDUMP(status) ((status) & 0x80)
  52 #endif
  53
  54 #else  /* !HAVE_SYS_WAIT_H */
  55
  56 /* Note that sys/wait.h may still be included by stdlib.h or something
  57    according to XPG.  */
  58
  59 #undef WEXITSTATUS
  60 #define WEXITSTATUS(status) (((status)  & 0xff00) >> 8)
  61 #undef WIFEXITED
  62 #define WIFEXITED(status) (WTERMSIG(status) == 0)
  63 #undef WIFSTOPPED
  64 #define WIFSTOPPED(status) (((status) & 0xff) == 0x7f)
  65 #undef WIFSIGNALED
  66 #define WIFSIGNALED(status) (!WIFSTOPPED(status) && !WIFEXITED(status))
  67 #undef WSTOPSIG
  68 #define WSTOPSIG(status) WEXITSTATUS(status)
  69 #undef WTERMSIG
  70 #define WTERMSIG(status) ((status) & 0x7f)
  71 #undef WCOREDUMP
  72 #define WCOREDUMP(status) ((status) & 0x80)
  73 #endif /* HAVE_SYS_WAIT_H */
  74
  75 #undef WAITTYPE
  76 #define WAITTYPE int
  77 #undef WRETCODE
  78 #define WRETCODE(status) WEXITSTATUS (status)
  79
  80 #else  /* !1 */
  81
  82 #ifndef WAITTYPE
  83
  84 #ifdef WAIT_USE_INT
  85 /* Some systems have  union wait  in their header, but we should use
  86    int regardless of that.  */
  87 #include <sys/wait.h>
  88 #define WAITTYPE int
  89 #define WRETCODE(w) WEXITSTATUS (w)
  90
  91 #else /* not WAIT_USE_INT */
  92
  93 #if (!defined (BSD_SYSTEM) && !defined (UNIPLUS) && !defined (STRIDE) && !(defined (HPUX) && !defined (NOMULTIPLEJOBS)) && !defined (HAVE_WAIT_HEADER))
  94 #define WAITTYPE int
  95 #define WIFSTOPPED(w) ((w&0377) == 0177)
  96 #define WIFSIGNALED(w) ((w&0377) != 0177 && (w&~0377) == 0)
  97 #define WIFEXITED(w) ((w&0377) == 0)
  98 #define WRETCODE(w) (w >> 8)
  99 #define WSTOPSIG(w) (w >> 8)
 100 #define WTERMSIG(w) (w & 0177)
 101 #ifndef WCOREDUMP
 102 #define WCOREDUMP(w) ((w&0200) != 0)
 103 #endif
 104
 105 #else
 106
 107 #ifdef BSD4_1
 108 #include <wait.h>
 109 #else
 110 #include <sys/wait.h>
 111 #endif /* not BSD 4.1 */
 112
 113 #define WAITTYPE union wait
 114 #define WRETCODE(w) w.w_retcode
 115 #undef WCOREDUMP                /* Later BSDs define this name differently.  */
 116 #define WCOREDUMP(w) w.w_coredump
 117
 118 #if defined (HPUX) || defined (convex)
 119 /* HPUX version 7 has broken definitions of these.  */
 120 /* pvogel@convex.com says the convex does too.  */
 121 #undef WTERMSIG
 122 #undef WSTOPSIG
 123 #undef WIFSTOPPED
 124 #undef WIFSIGNALED
 125 #undef WIFEXITED
 126 #endif /* HPUX | convex */
 127
 128 #ifndef WTERMSIG
 129 #define WTERMSIG(w) w.w_termsig
 130 #endif
 131 #ifndef WSTOPSIG
 132 #define WSTOPSIG(w) w.w_stopsig
 133 #endif
 134 #ifndef WIFSTOPPED
 135 #define WIFSTOPPED(w) (WTERMSIG (w) == 0177)
 136 #endif
 137 #ifndef WIFSIGNALED
 138 #define WIFSIGNALED(w) (WTERMSIG (w) != 0177 && (WSTOPSIG (w)) == 0)
 139 #endif
 140 #ifndef WIFEXITED
 141 #define WIFEXITED(w) (WTERMSIG (w) == 0)
 142 #endif
 143 #endif /* BSD_SYSTEM || UNIPLUS || STRIDE || HPUX */
 144 #endif /* not WAIT_USE_INT */
 145 #endif /* no WAITTYPE */
 146
 147 #endif /* 1 */
 148
 149 #else /* VMS */
 150
 151 #define WAITTYPE int
 152 #define WIFSTOPPED(w) 0
 153 #define WIFSIGNALED(w) 0
 154 #define WIFEXITED(w) ((w) != -1)
 155 #define WRETCODE(w) (w)
 156 #define WSTOPSIG(w) (w)
 157 #define WCOREDUMP(w) 0
 158 #define WTERMSIG(w) (w)
 159 #include <ssdef.h>
 160 #include <iodef.h>
 161 #include <clidef.h>
 162 #include "vmsproc.h"
 163
 164 #endif /* VMS */
 165
 166 #endif /* EMACS_SYSWAIT_H */