From 8bc78ccb0f36f5df0ca441c80031b8673a9cdfa8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Albrecht=20Dre=C3=9F?= <albrecht.dress@arcor.de>
Date: Sun, 24 Jan 2021 19:27:51 +0100
Subject: [PATCH] ensure attachment file name

Attached messages may have no file name.  In this case, set the
name to 'unlabeled_attachment.bin' so it visible in the listing
(option '-o') and can be extracted ('-a', '-z').  See also issue
koodaamo/tnefparse#74.

Index: tnefparse/tnef.py
--- tnefparse/tnef.py.orig
+++ tnefparse/tnef.py
@@ -112,7 +112,7 @@ class TNEFAttachment:
         name = [a.data for a in self.mapi_attrs if a.name == atname]
         if name:
             return name[0]
-        return self.name
+        return (self.name or 'unlabeled_attachment.bin')
 
     def add_attr(self, attribute):
         # For now, we ignore rendering/preview properties