gnu/usr.bin/tar/pathmax.h

/* Define PATH_MAX somehow.  Requires sys/types.h.
   Copyright (C) 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#ifndef _PATHMAX_H
#define _PATHMAX_H

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

/* Non-POSIX BSD systems might have gcc's limits.h, which doesn't define
   PATH_MAX but might cause redefinition warnings when sys/param.h is
   later included (as on MORE/BSD 4.3).  */
#if defined(_POSIX_VERSION) || (defined(HAVE_LIMITS_H) && defined(USG))
#include <limits.h>
#endif

#ifndef _POSIX_PATH_MAX
#define _POSIX_PATH_MAX 255
#endif

#if !defined(PATH_MAX) && defined(_PC_PATH_MAX)
#define PATH_MAX (pathconf ("/", _PC_PATH_MAX) < 1 ? 1024 : pathconf ("/", _PC_PATH_MAX))
#endif

/* Don't include sys/param.h if it already has been.  */
#if !defined(PATH_MAX) && !defined(MAXPATHLEN) && !defined(__MSDOS__)
#include <sys/param.h>
#endif

#if !defined(PATH_MAX) && defined(MAXPATHLEN)
#define PATH_MAX MAXPATHLEN
#endif

#ifndef PATH_MAX
#define PATH_MAX _POSIX_PATH_MAX
#endif

#endif /* _PATHMAX_H */