new module 'sys_wait'

[Bruno Haible]

This is a new module, providing a <sys/wait.h> file that also (more or less)
works on native Windows (mingw).

2008-10-19  Bruno Haible  <address@hidden>

        New module 'sys_wait'.
        * modules/sys_wait: New file.
        * lib/sys_wait.in.h: New file, partially copied from
        lib/wait-process.c.
        * m4/sys_wait_h.m4: New file.
        * doc/posix-headers/sys_wait.texi: Mention the new module.

========================== modules/sys_wait ==============================
Description:
A <sys/wait.h> for systems with missing declarations.

Files:
lib/sys_wait.in.h
m4/sys_wait_h.m4

Depends-on:
include_next
link-warning

configure.ac:
gl_SYS_WAIT_H
AC_PROG_MKDIR_P

Makefile.am:
BUILT_SOURCES += $(SYS_WAIT_H)

# We need the following in order to create <sys/wait.h> when the system
# has one that is incomplete.
sys/wait.h: sys_wait.in.h
        @MKDIR_P@ sys
        rm -f address@hidden $@
        { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
          sed -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
              -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
              -e 's|@''NEXT_SYS_WAIT_H''@|$(NEXT_SYS_WAIT_H)|g' \
              -e '/definition of GL_LINK_WARNING/r $(LINK_WARNING_H)' \
              < $(srcdir)/sys_wait.in.h; \
        } > address@hidden
        mv address@hidden $@
MOSTLYCLEANFILES += sys/wait.h sys/wait.h-t
MOSTLYCLEANDIRS += sys

Include:
#include <sys/wait.h>

License:
LGPLv2+

Maintainer:
Bruno Haible
========================== lib/sys_wait.in.h =============================
/* A POSIX-like <sys/wait.h>.
   Copyright (C) 2001-2003, 2005-2008 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */


#ifndef _GL_SYS_WAIT_H

#if __GNUC__ >= 3
@PRAGMA_SYSTEM_HEADER@
#endif

/* The include_next requires a split double-inclusion guard.  */
#if !((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
# @INCLUDE_NEXT@ @NEXT_SYS_WAIT_H@
#endif

#ifndef _GL_SYS_WAIT_H
#define _GL_SYS_WAIT_H

/* The definition of GL_LINK_WARNING is copied here.  */

#if !((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
/* Unix API.  */

/* The following macros apply to an argument x, that is a status of a process,
   as returned by waitpid().
   On nearly all systems, including Linux/x86, WEXITSTATUS are bits 15..8 and
   WTERMSIG are bits 7..0, while BeOS uses the opposite.  Therefore programs
   have to use the abstract macros.  */

/* For valid x, exactly one of WIFSIGNALED(x), WIFEXITED(x), WIFSTOPPED(x)
   is true.  */
# ifndef WIFSIGNALED
#  define WIFSIGNALED(x) (WTERMSIG (x) != 0 && WTERMSIG(x) != 0x7f)
# endif
# ifndef WIFEXITED
#  define WIFEXITED(x) (WTERMSIG (x) == 0)
# endif
# ifndef WIFSTOPPED
#  define WIFSTOPPED(x) (WTERMSIG (x) == 0x7f)
# endif

/* The termination signal. Only to be accessed if WIFSIGNALED(x) is true.  */
# ifndef WTERMSIG
#  define WTERMSIG(x) ((x) & 0x7f)
# endif

/* The exit status. Only to be accessed if WIFEXITED(x) is true.  */
# ifndef WEXITSTATUS
#  define WEXITSTATUS(x) (((x) >> 8) & 0xff)
# endif

/* True if the process dumped core.  Not standardized by POSIX.  */
# ifndef WCOREDUMP
#  define WCOREDUMP(x) ((x) & 0x80)
# endif

# ifdef __cplusplus
extern "C" {
# endif

/* Declarations of functions.  */

# ifdef __cplusplus
}
# endif

#else
/* Native Windows API.  */

# include <process.h>

# define waitpid(pid,statusp,options) _cwait (statusp, pid, WAIT_CHILD)

/* The following macros apply to an argument x, that is a status of a process,
   as returned by waitpid() or, equivalently, _cwait() or GetExitCodeProcess().
   This value is simply an 'int', not composed of bit fields.  */

/* When an unhandled fatal signal terminates a process, the exit code is 3.  */
# define WIFSIGNALED(x) ((x) == 3)
# define WIFEXITED(x) ((x) != 3)
# define WIFSTOPPED(x) 0

/* The signal that terminated a process is not known posthum.  */
# define WTERMSIG(x) SIGTERM

# define WEXITSTATUS(x) (x)

/* There are no core dumps.  */
# define WCOREDUMP(x) 0

#endif

#endif /* _GL_SYS_WAIT_H */
#endif /* _GL_SYS_WAIT_H */
========================== m4/sys_wait_h.m4 ==============================
# sys_wait_h.m4 serial 1
dnl Copyright (C) 2008 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

AC_DEFUN([gl_SYS_WAIT_H],
[
  AC_REQUIRE([gl_SYS_WAIT_H_DEFAULTS])

  gl_CHECK_NEXT_HEADERS([sys/wait.h])
  SYS_WAIT_H='sys/wait.h'
  AC_SUBST([SYS_WAIT_H])
])

AC_DEFUN([gl_SYS_WAIT_MODULE_INDICATOR],
[
  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
  AC_REQUIRE([gl_SYS_WAIT_H_DEFAULTS])
  
GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
])

AC_DEFUN([gl_SYS_WAIT_H_DEFAULTS],
[
  dnl Assume proper GNU behavior unless another module says otherwise.
])
==========================================================================
--- doc/posix-headers/sys_wait.texi.orig        2008-10-19 23:26:44.000000000 
+0200
+++ doc/posix-headers/sys_wait.texi     2008-10-19 21:06:04.000000000 +0200
@@ -3,15 +3,15 @@
 
 POSIX specification: @url{http://www.opengroup.org/susv3xbd/sys/wait.h.html}
 
-Gnulib module: ---
+Gnulib module: sys_wait
 
 Portability problems fixed by Gnulib:
 @itemize
address@hidden
+This header file is missing on some platforms:
+mingw.
 @end itemize
 
 Portability problems not fixed by Gnulib:
 @itemize
address@hidden
-This header file is missing on some platforms:
-mingw.
 @end itemize