include/posixwait.h

   1 /* posixwait.h -- job control definitions from POSIX 1003.1 */
   2
   3 /* Copyright (C) 1997 Free Software Foundation, Inc.
   4
   5    This file is part of GNU Bush, the Bourne Again SHell.
   6
   7    Bush 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    Bush 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 Bush.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #if !defined (_POSIXWAIT_H_)
  22 #  define _POSIXWAIT_H_
  23
  24 /* If _POSIX_VERSION is not defined, we assume that <sys/wait.h> defines
  25    a `union wait' and various macros used to manipulate it.  Look in
  26    unionwait.h for the things we expect to find. */
  27 #if defined (HAVE_SYS_WAIT_H)
  28 #  include <sys/wait.h>
  29 #else /* !HAVE_SYS_WAIT_H */
  30 #  if !defined (_POSIX_VERSION)
  31 #    include "unionwait.h"
  32 #  endif
  33 #endif  /* !HAVE_SYS_WAIT_H */
  34
  35 /* How to get the status of a job.  For Posix, this is just an
  36    int, but for other systems we have to crack the union wait. */
  37 #if !defined (_POSIX_VERSION)
  38 typedef union wait WAIT;
  39 #  define WSTATUS(t)  (t.w_status)
  40 #else /* _POSIX_VERSION */
  41 typedef int WAIT;
  42 #  define WSTATUS(t)  (t)
  43 #endif /* _POSIX_VERSION */
  44
  45 /* Make sure that parameters to wait3 are defined. */
  46 #if !defined (WNOHANG)
  47 #  define WNOHANG 1
  48 #  define WUNTRACED 2
  49 #endif /* WNOHANG */
  50
  51 /* More Posix P1003.1 definitions.  In the POSIX versions, the parameter is
  52    passed as an `int', in the non-POSIX version, as `union wait'. */
  53 #if defined (_POSIX_VERSION)
  54
  55 #  if !defined (WSTOPSIG)
  56 #    define WSTOPSIG(s)       ((s) >> 8)
  57 #  endif /* !WSTOPSIG */
  58
  59 #  if !defined (WTERMSIG)
  60 #    define WTERMSIG(s)       ((s) & 0177)
  61 #  endif /* !WTERMSIG */
  62
  63 #  if !defined (WEXITSTATUS)
  64 #    define WEXITSTATUS(s)    ((s) >> 8)
  65 #  endif /* !WEXITSTATUS */
  66
  67 #  if !defined (WIFSTOPPED)
  68 #    define WIFSTOPPED(s)     (((s) & 0177) == 0177)
  69 #  endif /* !WIFSTOPPED */
  70
  71 #  if !defined (WIFEXITED)
  72 #    define WIFEXITED(s)      (((s) & 0377) == 0)
  73 #  endif /* !WIFEXITED */
  74
  75 #  if !defined (WIFSIGNALED)
  76 #    define WIFSIGNALED(s)    (!WIFSTOPPED(s) && !WIFEXITED(s))
  77 #  endif /* !WIFSIGNALED */
  78
  79 #  if !defined (WIFCORED)
  80 #    if defined (WCOREDUMP)
  81 #      define WIFCORED(s)       (WCOREDUMP(s))
  82 #    else
  83 #      define WIFCORED(s)       ((s) & 0200)
  84 #    endif
  85 #  endif /* !WIFCORED */
  86
  87 #else /* !_POSIX_VERSION */
  88
  89 #  if !defined (WSTOPSIG)
  90 #    define WSTOPSIG(s)       ((s).w_stopsig)
  91 #  endif /* !WSTOPSIG */
  92
  93 #  if !defined (WTERMSIG)
  94 #    define WTERMSIG(s)       ((s).w_termsig)
  95 #  endif /* !WTERMSIG */
  96
  97 #  if !defined (WEXITSTATUS)
  98 #    define WEXITSTATUS(s)    ((s).w_retcode)
  99 #  endif /* !WEXITSTATUS */
 100
 101 #  if !defined (WIFCORED)
 102 #    define WIFCORED(s)       ((s).w_coredump)
 103 #  endif /* !WIFCORED */
 104
 105 #endif /* !_POSIX_VERSION */
 106
 107 #endif /* !_POSIXWAIT_H_ */