| [3611] | 1 | /* Define PATH_MAX somehow. Requires sys/types.h.
|
|---|
| 2 | Copyright (C) 1992, 1999, 2001, 2003, 2005, 2009-2022 Free Software
|
|---|
| 3 | Foundation, Inc.
|
|---|
| 4 |
|
|---|
| 5 | This file is free software: you can redistribute it and/or modify
|
|---|
| 6 | it under the terms of the GNU Lesser General Public License as
|
|---|
| 7 | published by the Free Software Foundation; either version 2.1 of the
|
|---|
| 8 | License, or (at your option) any later version.
|
|---|
| 9 |
|
|---|
| 10 | This file 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 Lesser General Public License for more details.
|
|---|
| 14 |
|
|---|
| 15 | You should have received a copy of the GNU Lesser General Public License
|
|---|
| 16 | along with this program. If not, see <https://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 | <https://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 __CYGWIN__
|
|---|
| 69 | /* The page "Naming Files, Paths, and Namespaces" on msdn.microsoft.com,
|
|---|
| 70 | section "Maximum Path Length Limitation",
|
|---|
| 71 | <https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file#maximum-path-length-limitation>
|
|---|
| 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 */
|
|---|
