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authorLudovic Courtès <ludo@gnu.org>2011-10-22 16:24:32 +0200
committerLudovic Courtès <ludo@gnu.org>2011-10-22 16:24:32 +0200
commit35428fb6b2d269dbfa2eec7d0739aec149bd4cc2 (patch)
tree03146c5871ad9b2167f3dffc89fdbb3082d7fc4e /lib/pathmax.h
parentfe4ea6859e7d19a0fe2694a3fb49f4abb722afc1 (diff)
downloadguile-35428fb6b2d269dbfa2eec7d0739aec149bd4cc2.tar.gz
Update Gnulib to v0.0-6523-gb3609c1.
Diffstat (limited to 'lib/pathmax.h')
-rw-r--r--lib/pathmax.h41
1 files changed, 31 insertions, 10 deletions
diff --git a/lib/pathmax.h b/lib/pathmax.h
index 41f0ba276..4de9c344d 100644
--- a/lib/pathmax.h
+++ b/lib/pathmax.h
@@ -23,7 +23,22 @@
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. */
+ 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
+ */
# include <unistd.h>
@@ -33,11 +48,6 @@
# define _POSIX_PATH_MAX 256
# endif
-# if !defined PATH_MAX && defined _PC_PATH_MAX && defined HAVE_PATHCONF
-# define PATH_MAX (pathconf ("/", _PC_PATH_MAX) < 1 ? 1024 \
- : pathconf ("/", _PC_PATH_MAX))
-# endif
-
/* Don't include sys/param.h if it already has been. */
# if defined HAVE_SYS_PARAM_H && !defined PATH_MAX && !defined MAXPATHLEN
# include <sys/param.h>
@@ -47,10 +57,6 @@
# define PATH_MAX MAXPATHLEN
# endif
-# ifndef PATH_MAX
-# 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.
@@ -60,4 +66,19 @@
# define PATH_MAX 1024
# endif
+# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+/* The page "Naming Files, Paths, and Namespaces" on msdn.microsoft.com,
+ section "Maximum Path Length Limitation",
+ <http://msdn.microsoft.com/en-us/library/aa365247(v=vs.85).aspx#maxpath>
+ 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. */
+# undef PATH_MAX
+# define PATH_MAX 260
+# endif
+
#endif /* _PATHMAX_H */