Import of code from heimdal

This commit updates the code imported from heimdal to
4a438db29d361b7e5f47b86ced1482a96cde86ea (switch-from-svn-to-git-3008-g4a438db)

New files are:
	roken/rename.c

Change-Id: Ib32975e9ec7f3d6abf5557cfd37fb40f248d00f0
Reviewed-on: http://gerrit.openafs.org/8025
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementix.org>

diff --git a/src/external/heimdal/roken/rename.c b/src/external/heimdal/roken/rename.c
new file mode 100644 (file)
index 0000000..d7348d3
--- /dev/null
+++ b/src/external/heimdal/roken/rename.c
@@ -0,0 +1,49 @@
+/***********************************************************************
+ * Copyright (c) 2010, Secure Endpoints Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in
+ *   the documentation and/or other materials provided with the
+ *   distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ **********************************************************************/
+
+#include <config.h>
+#include "roken.h"
+
+/* rename() for platforms where the native implementation doesn't
+ * unlink newname. */
+int rk_rename(const char * oldname, const char * newname)
+{
+    int ret;
+
+    ret = rename(oldname, newname);
+    if (ret != 0 && (errno == EEXIST || errno == EACCES)) {
+        ret = unlink(newname);
+        if (ret == 0)
+            ret = rename(oldname, newname);
+    }
+
+    return ret;
+}