doc: Document the `sitedir' and `extensiondir' pkg-config variables.
[bpt/guile.git] / lib / pathmax.h
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ffca4c22 1/* Define PATH_MAX somehow. Requires sys/types.h.
49114fd4 2 Copyright (C) 1992, 1999, 2001, 2003, 2005, 2009-2011 Free Software
61cd9dc9 3 Foundation, Inc.
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4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2, 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 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, write to the Free Software Foundation,
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18
19#ifndef _PATHMAX_H
20# define _PATHMAX_H
21
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22/* POSIX:2008 defines PATH_MAX to be the maximum number of bytes in a filename,
23 including the terminating NUL byte.
24 <http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/limits.h.html>
25 PATH_MAX is not defined on systems which have no limit on filename length,
26 such as GNU/Hurd. */
27
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28# include <unistd.h>
29
30# include <limits.h>
31
32# ifndef _POSIX_PATH_MAX
33# define _POSIX_PATH_MAX 256
34# endif
35
36# if !defined PATH_MAX && defined _PC_PATH_MAX && defined HAVE_PATHCONF
37# define PATH_MAX (pathconf ("/", _PC_PATH_MAX) < 1 ? 1024 \
1cd4fffc 38 : pathconf ("/", _PC_PATH_MAX))
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39# endif
40
41/* Don't include sys/param.h if it already has been. */
42# if defined HAVE_SYS_PARAM_H && !defined PATH_MAX && !defined MAXPATHLEN
43# include <sys/param.h>
44# endif
45
46# if !defined PATH_MAX && defined MAXPATHLEN
47# define PATH_MAX MAXPATHLEN
48# endif
49
50# ifndef PATH_MAX
51# define PATH_MAX _POSIX_PATH_MAX
52# endif
53
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54# ifdef __hpux
55/* On HP-UX, PATH_MAX designates the maximum number of bytes in a filename,
56 *not* including the terminating NUL byte, and is set to 1023.
57 Additionally, when _XOPEN_SOURCE is defined to 500 or more, PATH_MAX is
58 not defined at all any more. */
59# undef PATH_MAX
60# define PATH_MAX 1024
61# endif
62
ffca4c22 63#endif /* _PATHMAX_H */