Cygwin generates OSError when changing permissions on partitions.

git-svn-id: http://svn.savannah.nongnu.org/svn/rdiff-backup@789 2b77aa54-bcbc-44c9-a7ec-4f6cf2b41109

trunk/rdiff-backup/CHANGELOG

 New in v1.1.9 (????/??/??)
 --------------------------
 
+Cygwin generates OSError when changing permissions on partitions.
+(Patch from Andrew Ferguson.)
+
 Fix fs_abilities.py patch error with set_escape_dos_devices.
 (Marc Dyksterhouse)
 

trunk/rdiff-backup/rdiff_backup/Main.py

@@ -381,7 +381,10 @@ def backup_set_rbdir(rpin, rpout):
 
 	assert rpout.lstat(), (rpout.path, rpout.lstat())
 	if rpout.isdir() and not rpout.listdir(): # rpout is empty dir
-		rpout.chmod(0700) # just make sure permissions aren't too lax
+		try:
+			rpout.chmod(0700) # just make sure permissions aren't too lax
+		except OSError:
+			log.Log("Cannot change permissions on target directory.", 2)
 	elif not Globals.rbdir.lstat() and not force: Log.FatalError(
 """Destination directory