copyonwrite: Fix write mode detection for binary files.

Due to this bug, copyonwrite path was not correctly unbound on binary files.
tv42 · Jul 3, 2009 · c2ed55c · c2ed55c
1 parent 371aeca
commit c2ed55c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/filesystem/copyonwrite.py b/filesystem/copyonwrite.py
@@ -14,7 +14,7 @@ def __init__(self, bind=None, **kwargs):
             self._bound = getattr(kwargs.get('parent',''), '_bind', None)
 
     def open(self, mode='r', *moreargs, **kwargs):
-        if mode == 'w':
+        if 'w' in mode:
             self.unbind()
         ## TODO: we don't have test code for this yet
         #elif mode == 'r+':