/* Define PATH_MAX somehow. Requires sys/types.h. Copyright (C) 1992, 1999, 2001, 2003, 2005, 2009-2020 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 3, 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, see <https://www.gnu.org/licenses/>. */ #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. <https://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 # if defined _WIN32 && ! defined __CYGWIN__ /* The page "Naming Files, Paths, and Namespaces" on msdn.microsoft.com, section "Maximum Path Length Limitation", <https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file#maximum-path-length-limitation> explains that the maximum size of a filename, including the terminating NUL byte, is 260 = 3 + 256 + 1. This is the same value as - FILENAME_MAX in <stdio.h>, - _MAX_PATH in <stdlib.h>, - MAX_PATH in <windef.h>. Undefine the original value, because mingw's <limits.h> gets it wrong. */ # undef PATH_MAX # define PATH_MAX 260 # endif #endif /* _PATHMAX_H */ |