From bc4430e5d9863cc30c3b807d37ec7a32c64f4d10 Mon Sep 17 00:00:00 2001
From: Daniel Schadt <kingdread@gmx.de>
Date: Fri, 24 Mar 2017 11:36:19 +0100
Subject: [PATCH] prevent reserved filenames on Windows

Fixes #82

Prevents filenames like COM1, ...
---
 qutebrowser/mainwindow/prompt.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/qutebrowser/mainwindow/prompt.py b/qutebrowser/mainwindow/prompt.py
index b8b842057..ff676146d 100644
--- a/qutebrowser/mainwindow/prompt.py
+++ b/qutebrowser/mainwindow/prompt.py
@@ -23,6 +23,7 @@ import re
 import sys
 import os.path
 import html
+import pathlib
 import collections
 
 import sip
@@ -657,6 +658,10 @@ class FilenamePrompt(_BasePrompt):
         # E:filename is invalid
         if re.match(r'[A-Z]:[^\\]', path, re.IGNORECASE):
             return None
+        # Paths like COM1, ...
+        # See https://github.com/qutebrowser/qutebrowser/issues/82
+        if pathlib.Path(path).is_reserved():
+            return None
         return path
 
     def _show_error(self, msg):