lib/pathmax.h

   1 /* Define PATH_MAX somehow.  Requires sys/types.h.
   2    Copyright (C) 1992 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  17
  18 #ifndef _PATHMAX_H
  19 #define _PATHMAX_H
  20
  21 #ifdef HAVE_UNISTD_H
  22 #include <unistd.h>
  23 #endif
  24
  25 /* Non-POSIX BSD systems might have gcc's limits.h, which doesn't define
  26    PATH_MAX but might cause redefinition warnings when sys/param.h is
  27    later included (as on MORE/BSD 4.3).  */
  28 #if defined(_POSIX_VERSION) || (defined(HAVE_LIMITS_H) && !defined(__GNUC__))
  29 #include <limits.h>
  30 #endif
  31
  32 #ifndef _POSIX_PATH_MAX
  33 #define _POSIX_PATH_MAX 255
  34 #endif
  35
  36 #if !defined(PATH_MAX) && defined(_PC_PATH_MAX)
  37 #define PATH_MAX (pathconf ("/", _PC_PATH_MAX) < 1 ? 1024 : pathconf ("/", _PC_PATH_MAX))
  38 #endif
  39
  40 /* Don't include sys/param.h if it already has been.  */
  41 #if defined(HAVE_SYS_PARAM_H) && !defined(PATH_MAX) && !defined(MAXPATHLEN)
  42 #include <sys/param.h>
  43 #endif
  44
  45 #if !defined(PATH_MAX) && defined(MAXPATHLEN)
  46 #define PATH_MAX MAXPATHLEN
  47 #endif
  48
  49 #ifndef PATH_MAX
  50 #define PATH_MAX _POSIX_PATH_MAX
  51 #endif
  52
  53 #endif /* _PATHMAX_H */