ext.shell_escape: Fixed escaping of tabs and unprintables

1 files changed, 5 insertions, 2 deletions

diff --git a/ranger/ext/shell_escape.py b/ranger/ext/shell_escape.py
index 28a502bf..b68afc33 100644
--- a/ranger/ext/shell_escape.py
+++ b/ranger/ext/shell_escape.py
@@ -18,17 +18,20 @@ Functions to escape metacharacters of arguments for shell commands.
 """
 
 META_CHARS = (' ', "'", '"', '`', '&', '|', ';',
-		'$', '!', '(', ')', '[', ']', '<', '>')
+		'$', '!', '(', ')', '[', ']', '<', '>', '\t')
+UNESCAPABLE = set(map(chr, list(range(9)) + list(range(10, 32)) \
+		+ list(range(127, 256))))
 META_DICT = dict([(mc, '\\' + mc) for mc in META_CHARS])
 
 def shell_quote(string):
 	"""Escapes by quoting"""
 	return "'" + str(string).replace("'", "'\\''") + "'"
 
-
 def shell_escape(arg):
 	"""Escapes by adding backslashes"""
 	arg = str(arg)
+	if UNESCAPABLE & set(arg):
+		return shell_quote(arg)
 	arg = arg.replace('\\', '\\\\') # make sure this comes at the start
 	for k, v in META_DICT.items():
 		arg = arg.replace(k, v)