kc3-lang/gnulib/lib/pathmax.h

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• Hash : 6310fc6d
  Author :
  Date : 2011-08-05T03:01:01
  

  pathmax: Leave PATH_MAX undefined on the Hurd, and a constant otherwise.
  
  * lib/pathmax.h (PATH_MAX): Leave it undefined on GNU/Hurd.
  * lib/chdir-long.h: Include pathmax.h.
  * lib/clean-temp.c (PATH_MAX): Remove code that is done by pathmax.h.
  * lib/getcwd.c: Include pathmax.h instead of <limits.h>.
  (PATH_MAX): Remove code that is done by pathmax.h.
  * lib/canonicalize.c (PATH_MAX): Provide a fallback value.
  * lib/tmpfile.c: Add a comment.
  * m4/pathmax.m4 (gl_PATHMAX): Don't test for pathconf.
  * modules/chdir-long (Depends-on): Add pathmax.
  * modules/getcwd (Depends-on): Add pathmax.
  * tests/test-getcwd.c (test_abort_bug): Avoid syntax error when PATH_MAX
  is not defined.
  * doc/posix-headers/limits.texi: Mention the pathmax module.
  * NEWS: Mention the change.
  

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• lib/pathmax.h

• /* Define PATH_MAX somehow.  Requires sys/types.h.
     Copyright (C) 1992, 1999, 2001, 2003, 2005, 2009-2011 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.  */
  
  #ifndef _PATHMAX_H
  # define _PATHMAX_H
  
  /* POSIX:2008 defines PATH_MAX to be the maximum number of bytes in a filename,
     including the terminating NUL byte.
     <http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/limits.h.html>
     PATH_MAX is not defined on systems which have no limit on filename length,
     such as GNU/Hurd.
  
     This file does *not* define PATH_MAX always.  Programs that use this file
     can handle the GNU/Hurd case in several ways:
       - Either with a package-wide handling, or with a per-file handling,
       - Either through a
           #ifdef PATH_MAX
         or through a fallback like
           #ifndef PATH_MAX
           # define PATH_MAX 8192
           #endif
         or through a fallback like
           #ifndef PATH_MAX
           # define PATH_MAX pathconf ("/", _PC_PATH_MAX)
           #endif
   */
  
  # include <unistd.h>
  
  # include <limits.h>
  
  # ifndef _POSIX_PATH_MAX
  #  define _POSIX_PATH_MAX 256
  # endif
  
  /* Don't include sys/param.h if it already has been.  */
  # if defined HAVE_SYS_PARAM_H && !defined PATH_MAX && !defined MAXPATHLEN
  #  include <sys/param.h>
  # endif
  
  # if !defined PATH_MAX && defined MAXPATHLEN
  #  define PATH_MAX MAXPATHLEN
  # endif
  
  # ifdef __hpux
  /* On HP-UX, PATH_MAX designates the maximum number of bytes in a filename,
     *not* including the terminating NUL byte, and is set to 1023.
     Additionally, when _XOPEN_SOURCE is defined to 500 or more, PATH_MAX is
     not defined at all any more.  */
  #  undef PATH_MAX
  #  define PATH_MAX 1024
  # endif
  
  #endif /* _PATHMAX_H */
  

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