From: Greg Troxel <gdt@ir.bbn.com>
Date: Tue, 3 Jun 2014 14:59:56 +0000 (-0400)
Subject: Avoid using incomplete utimensat implementations.
X-Git-Tag: 0.26-rc2~7
X-Git-Url: https://arthur.barton.de/gitweb/?p=bup.git;a=commitdiff_plain;h=27d68e9dce19954fc6a86884b5b76a696a710fe8

Avoid using incomplete utimensat implementations.

At least NetBSD 6 has partial support for utimensat, implementing the
function but not providing needed definitions via sys/stat.h as POSIX
requires.  Check for needed defines, and if missing, undefine
HAVE_UTIMENSAT.

Signed-Off-By: Greg Troxel <gdt@ir.bbn.com>
Tested-By: Greg Troxel <gdt@ir.bbn.com>
Reviewed-by: Rob Browning <rlb@defaultvalue.org>
---

diff --git a/lib/bup/_helpers.c b/lib/bup/_helpers.c
index ea49c0e..6957d2c 100644
--- a/lib/bup/_helpers.c
+++ b/lib/bup/_helpers.c
@@ -39,6 +39,14 @@
 #define BUP_HAVE_FILE_ATTRS 1
 #endif
 
+/*
+ * Check for incomplete UTIMENSAT support (NetBSD 6), and if so,
+ * pretend we don't have it.
+ */
+#if !defined(AT_FDCWD) || !defined(AT_SYMLINK_NOFOLLOW)
+#undef HAVE_UTIMENSAT
+#endif
+
 #ifndef FS_NOCOW_FL
 // Of course, this assumes it's a bitfield value.
 #define FS_NOCOW_FL 0