Update Gnulib to v0.0-5874-g7170ee0.

[bpt/guile.git] / lib / pathmax.h

diff --git a/lib/pathmax.h b/lib/pathmax.h
index a5d4335..41f0ba2 100644 (file)
--- a/lib/pathmax.h
+++ b/lib/pathmax.h
@@ -1,5 +1,6 @@
 /* Define PATH_MAX somehow.  Requires sys/types.h.
-   Copyright (C) 1992, 1999, 2001, 2003, 2005, 2009 Free Software Foundation, Inc.
+   Copyright (C) 1992, 1999, 2001, 2003, 2005, 2009-2011 Free Software
+   Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
@@ -18,6 +19,12 @@
 #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.
+   <http://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.  */
+
 # include <unistd.h>
 
 # include <limits.h>
@@ -28,7 +35,7 @@
 
 # if !defined PATH_MAX && defined _PC_PATH_MAX && defined HAVE_PATHCONF
 #  define PATH_MAX (pathconf ("/", _PC_PATH_MAX) < 1 ? 1024 \
-                   : pathconf ("/", _PC_PATH_MAX))
+                    : pathconf ("/", _PC_PATH_MAX))
 # endif
 
 /* Don't include sys/param.h if it already has been.  */
@@ -44,4 +51,13 @@
 #  define PATH_MAX _POSIX_PATH_MAX
 # 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
+
 #endif /* _PATHMAX_H */