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83 lines
2.9 KiB
83 lines
2.9 KiB
/* Define PATH_MAX somehow. Requires sys/types.h. |
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Copyright (C) 1992, 1999, 2001, 2003, 2005, 2009-2017 Free Software |
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Foundation, Inc. |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 3, or (at your option) |
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any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, see <http://www.gnu.org/licenses/>. */ |
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#ifndef _PATHMAX_H |
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# define _PATHMAX_H |
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/* POSIX:2008 defines PATH_MAX to be the maximum number of bytes in a filename, |
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including the terminating NUL byte. |
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<http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/limits.h.html> |
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PATH_MAX is not defined on systems which have no limit on filename length, |
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such as GNU/Hurd. |
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This file does *not* define PATH_MAX always. Programs that use this file |
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can handle the GNU/Hurd case in several ways: |
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- Either with a package-wide handling, or with a per-file handling, |
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- Either through a |
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#ifdef PATH_MAX |
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or through a fallback like |
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#ifndef PATH_MAX |
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# define PATH_MAX 8192 |
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#endif |
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or through a fallback like |
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#ifndef PATH_MAX |
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# define PATH_MAX pathconf ("/", _PC_PATH_MAX) |
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#endif |
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*/ |
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# include <unistd.h> |
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# include <limits.h> |
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# ifndef _POSIX_PATH_MAX |
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# define _POSIX_PATH_MAX 256 |
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# endif |
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/* Don't include sys/param.h if it already has been. */ |
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# if defined HAVE_SYS_PARAM_H && !defined PATH_MAX && !defined MAXPATHLEN |
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# include <sys/param.h> |
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# endif |
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# if !defined PATH_MAX && defined MAXPATHLEN |
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# define PATH_MAX MAXPATHLEN |
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# endif |
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# ifdef __hpux |
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/* On HP-UX, PATH_MAX designates the maximum number of bytes in a filename, |
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*not* including the terminating NUL byte, and is set to 1023. |
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Additionally, when _XOPEN_SOURCE is defined to 500 or more, PATH_MAX is |
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not defined at all any more. */ |
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# undef PATH_MAX |
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# define PATH_MAX 1024 |
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# endif |
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# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ |
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/* The page "Naming Files, Paths, and Namespaces" on msdn.microsoft.com, |
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section "Maximum Path Length Limitation", |
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<http://msdn.microsoft.com/en-us/library/aa365247(v=vs.85).aspx#maxpath> |
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explains that the maximum size of a filename, including the terminating |
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NUL byte, is 260 = 3 + 256 + 1. |
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This is the same value as |
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- FILENAME_MAX in <stdio.h>, |
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- _MAX_PATH in <stdlib.h>, |
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- MAX_PATH in <windef.h>. |
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Undefine the original value, because mingw's <limits.h> gets it wrong. */ |
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# undef PATH_MAX |
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# define PATH_MAX 260 |
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# endif |
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#endif /* _PATHMAX_H */
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