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 #include <sys/types.h>
  30
  31 #ifdef HAVE_SYS_WAIT_H  /* We have sys/wait.h with POSIXoid definitions. */
  32 #include <sys/wait.h>
  33 #endif  /* !HAVE_SYS_WAIT_H */
  34
  35 #ifndef WCOREDUMP               /* not POSIX */
  36 #define WCOREDUMP(status) ((status) & 0x80)
  37 #endif
  38 #ifndef WEXITSTATUS
  39 #define WEXITSTATUS(status) (((status)  & 0xff00) >> 8)
  40 #endif
  41 #ifndef WIFEXITED
  42 #define WIFEXITED(status) (WTERMSIG(status) == 0)
  43 #endif
  44 #ifndef WIFSTOPPED
  45 #define WIFSTOPPED(status) (((status) & 0xff) == 0x7f)
  46 #endif
  47 #ifndef WIFSIGNALED
  48 #define WIFSIGNALED(status) (!WIFSTOPPED(status) && !WIFEXITED(status))
  49 #endif
  50 #ifndef WSTOPSIG
  51 #define WSTOPSIG(status) WEXITSTATUS(status)
  52 #endif
  53 #ifndef WTERMSIG
  54 #define WTERMSIG(status) ((status) & 0x7f)
  55 #endif
  56
  57 #undef WRETCODE
  58 #define WRETCODE(status) WEXITSTATUS (status)
  59
  60 #else /* VMS */
  61
  62 #define WIFSTOPPED(w) 0
  63 #define WIFSIGNALED(w) 0
  64 #define WIFEXITED(w) ((w) != -1)
  65 #define WRETCODE(w) (w)
  66 #define WSTOPSIG(w) (w)
  67 #define WCOREDUMP(w) 0
  68 #define WTERMSIG(w) (w)
  69 #include <ssdef.h>
  70 #include <iodef.h>
  71 #include <clidef.h>
  72 #include "vmsproc.h"
  73
  74 #endif /* VMS */
  75
  76 #endif /* EMACS_SYSWAIT_H */
  77
  78 /* arch-tag: 7e5d9719-ec66-4b6f-89bb-563eea16a899
  79    (do not change this comment) */