1 /* Define PATH_MAX somehow. Requires sys/types.h. 2 Copyright (C) 1992, 1999, 2001, 2003, 2005, 2009-2012 Free Software 3 Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3, or (at your option) 8 any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, see <http://www.gnu.org/licenses/>. */ 17 18 #ifndef _PATHMAX_H 19 # define _PATHMAX_H 20 21 /* POSIX:2008 defines PATH_MAX to be the maximum number of bytes in a filename, 22 including the terminating NUL byte. 23 <http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/limits.h.html> 24 PATH_MAX is not defined on systems which have no limit on filename length, 25 such as GNU/Hurd. 26 27 This file does *not* define PATH_MAX always. Programs that use this file 28 can handle the GNU/Hurd case in several ways: 29 - Either with a package-wide handling, or with a per-file handling, 30 - Either through a 31 #ifdef PATH_MAX 32 or through a fallback like 33 #ifndef PATH_MAX 34 # define PATH_MAX 8192 35 #endif 36 or through a fallback like 37 #ifndef PATH_MAX 38 # define PATH_MAX pathconf ("/", _PC_PATH_MAX) 39 #endif 40 */ 41 42 # include <unistd.h> 43 44 # include <limits.h> 45 46 # ifndef _POSIX_PATH_MAX 47 # define _POSIX_PATH_MAX 256 48 # endif 49 50 /* Don't include sys/param.h if it already has been. */ 51 # if defined HAVE_SYS_PARAM_H && !defined PATH_MAX && !defined MAXPATHLEN 52 # include <sys/param.h> 53 # endif 54 55 # if !defined PATH_MAX && defined MAXPATHLEN 56 # define PATH_MAX MAXPATHLEN 57 # endif 58 59 # ifdef __hpux 60 /* On HP-UX, PATH_MAX designates the maximum number of bytes in a filename, 61 *not* including the terminating NUL byte, and is set to 1023. 62 Additionally, when _XOPEN_SOURCE is defined to 500 or more, PATH_MAX is 63 not defined at all any more. */ 64 # undef PATH_MAX 65 # define PATH_MAX 1024 66 # endif 67 68 # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ 69 /* The page "Naming Files, Paths, and Namespaces" on msdn.microsoft.com, 70 section "Maximum Path Length Limitation", 71 <http://msdn.microsoft.com/en-us/library/aa365247(v=vs.85).aspx#maxpath> 72 explains that the maximum size of a filename, including the terminating 73 NUL byte, is 260 = 3 + 256 + 1. 74 This is the same value as 75 - FILENAME_MAX in <stdio.h>, 76 - _MAX_PATH in <stdlib.h>, 77 - MAX_PATH in <windef.h>. 78 Undefine the original value, because mingw's <limits.h> gets it wrong. */ 79 # undef PATH_MAX 80 # define PATH_MAX 260 81 # endif 82 83 #endif /* _PATHMAX_H */ 84
