| /* Define PATH_MAX somehow. Requires sys/types.h. | |
| Copyright (C) 1992, 1999, 2001, 2003, 2005, 2009-2023 Free Software | |
| Foundation, Inc. | |
| This file is free software: you can redistribute it and/or modify | |
| it under the terms of the GNU Lesser General Public License as | |
| published by the Free Software Foundation; either version 2.1 of the | |
| License, or (at your option) any later version. | |
| This file 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 Lesser General Public License for more details. | |
| You should have received a copy of the GNU Lesser General Public License | |
| along with this program. If not, see <https://www.gnu.org/licenses/>. */ | |
| /* 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 | |
| */ | |
| /* Don't include sys/param.h if it already has been. */ | |
| /* 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. */ | |
| /* 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. */ | |