view lib/sys_select.in.h @ 14641:9a3f3761a941

getcwd: fix mingw bugs On mingw, getcwd(NULL,1) succeeds, even though glibc documents that with a non-zero size, the allocation will not exceed that many bytes. On mingw, getcwd has the wrong signature. However, we don't have to check for this if anything else triggers the replacement. Also, fix a type bug that crept into the original getcwd-lgpl commit. * m4/getcwd.m4 (gl_FUNC_GETCWD_NULL): Detect one mingw bug. * doc/posix-functions/getcwd.texi (getcwd): Document the problems. * lib/getcwd-lgpl.c (rpl_getcwd): Fix return type. Signed-off-by: Eric Blake <eblake@redhat.com>
author Eric Blake <eblake@redhat.com>
date Wed, 27 Apr 2011 20:40:21 -0600
parents 97fc9a21a8fb
children 0e87a6225f1a
line wrap: on
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/* Substitute for <sys/select.h>.
   Copyright (C) 2007-2011 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.  */

# if __GNUC__ >= 3
@PRAGMA_SYSTEM_HEADER@
# endif
@PRAGMA_COLUMNS@

/* On OSF/1, <sys/types.h> and <sys/time.h> include <sys/select.h>.
   Simply delegate to the system's header in this case.  */
#if @HAVE_SYS_SELECT_H@ && defined __osf__ && (defined _SYS_TYPES_H_ && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H) && defined _OSF_SOURCE

# define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H
# @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@

#elif @HAVE_SYS_SELECT_H@ && defined __osf__ && (defined _SYS_TIME_H_ && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H) && defined _OSF_SOURCE

# define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H
# @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@

#else

#ifndef _GL_SYS_SELECT_H

#if @HAVE_SYS_SELECT_H@

/* On many platforms, <sys/select.h> assumes prior inclusion of
   <sys/types.h>.  */
# include <sys/types.h>

/* On OSF/1 4.0, <sys/select.h> provides only a forward declaration
   of 'struct timeval', and no definition of this type.
   Also, MacOS X, AIX, HP-UX, IRIX, Solaris, Interix declare select()
   in <sys/time.h>.
   But avoid namespace pollution on glibc systems.  */
# ifndef __GLIBC__
#  include <sys/time.h>
# endif

/* On Solaris 10, <sys/select.h> provides an FD_ZERO implementation
   that relies on memset(), but without including <string.h>.
   But in any case avoid namespace pollution on glibc systems.  */
# if (defined __OpenBSD__ || defined __sun || defined __osf__ || defined __BEOS__) \
     && ! defined __GLIBC__
#  include <string.h>
# endif

/* The include_next requires a split double-inclusion guard.  */
# @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@

#endif

#ifndef _GL_SYS_SELECT_H
#define _GL_SYS_SELECT_H

#if !@HAVE_SYS_SELECT_H@
/* A platform that lacks <sys/select.h>.  */
/* Get the 'struct timeval' and 'fd_set' types and the FD_* macros
   on most platforms.  */
# include <sys/time.h>
/* On HP-UX 11, <sys/time.h> provides an FD_ZERO implementation
   that relies on memset(), but without including <string.h>.  */
# if defined __hpux
#  include <string.h>
# endif
/* On native Windows platforms:
   Get the 'fd_set' type.  Also, gnulib's <sys/socket.h> redefines select
   so as to hide the declaration from <winsock2.h>.  */
# include <sys/socket.h>
#endif

/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */

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


#if @GNULIB_SELECT@
# if @HAVE_WINSOCK2_H@ || @REPLACE_SELECT@
#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
#   undef select
#   define select rpl_select
#  endif
_GL_FUNCDECL_RPL (select, int,
                  (int, fd_set *, fd_set *, fd_set *, struct timeval *));
_GL_CXXALIAS_RPL (select, int,
                  (int, fd_set *, fd_set *, fd_set *, struct timeval *));
# else
_GL_CXXALIAS_SYS (select, int,
                  (int, fd_set *, fd_set *, fd_set *, struct timeval *));
# endif
_GL_CXXALIASWARN (select);
#elif @HAVE_WINSOCK2_H@
# undef select
# define select select_used_without_requesting_gnulib_module_select
#elif defined GNULIB_POSIXCHECK
# undef select
# if HAVE_RAW_DECL_SELECT
_GL_WARN_ON_USE (select, "select is not always POSIX compliant - "
                 "use gnulib module select for portability");
# endif
#endif


#endif /* _GL_SYS_SELECT_H */
#endif /* _GL_SYS_SELECT_H */
#endif /* OSF/1 */