properly escape file names when using rglob

ui/medashare/btv/__init__.py

@@ -1,5 +1,6 @@
 
 from . import bencode
+import fnmatch
 from functools import reduce
 from hashlib import sha1
 import importlib.resources
@@ -15,6 +16,11 @@ _encoding = 'utf-8'
 
 __all__ = [ 'validate', 'validate_file' ]
 
+_escapes = '*?[]'
+
+def glob_escape(s):
+	return ''.join(x if x not in _escapes else '[%s]' % x for x in s)
+
 class Storage:
 	'''A class to help read pieces of a torrent.
 	'''
@@ -123,7 +129,9 @@ def validate_file(fname):
 	with open(fname, 'rb') as fp:
 		torrent = bencode.bdecode(fp.read())
 
-	dirname = list(fname.parent.rglob(torrent['info']['name'].decode(_encoding)))[0]
+	finddname = glob_escape(torrent['info']['name'].decode(_encoding))
+
+	dirname = list(fname.parent.rglob(finddname))[0]
 
 	tordir = dirname.parent
 
@@ -244,6 +252,12 @@ class _TestCases(unittest.TestCase):
 
 		self.assertFalse(bad)
 
+	def test_escapeglob(self):
+		for i in [
+			'*', '?', '[', '[]', '*?[][[*?',
+		    ]:
+			self.assertTrue(fnmatch.fnmatch(i, glob_escape(i)))
+
 	def test_verification(self):
 		# Testing for "missing" files
 		# piece size 2 (aka 4 bytes)