xattr-helper.py: fix backslash quoting

diff --git a/bin/xattr-helper.py b/bin/xattr-helper.py
index d40217c9a8d4db9a7ad318379e1f4d43371479cb..b832f5ea770ec7d372efc827a089eafdfa78696c 100755 (executable)
--- a/bin/xattr-helper.py
+++ b/bin/xattr-helper.py
@@ -94,11 +94,14 @@ def dump_xattrs(file_in, file_out):
                attrs = xattr.list(pathname)
                if not attrs:
                        continue
-               file_out.write(b'# file: ' + quote(pathname, b'\n\r') + b'\n')
+
+               # NOTE: Always quote backslashes, in order to ensure that they are
+               # not interpreted as quotes when they are processed by unquote.
+               file_out.write(b'# file: ' + quote(pathname, b'\n\r\\\\') + b'\n')
                for attr in attrs:
                        attr = unicode_encode(attr)
-                       file_out.write(quote(attr, b'=\n\r') + b'="' +
-                               quote(xattr.get(pathname, attr), b'\\\0\n\r"') + b'"\n')
+                       file_out.write(quote(attr, b'=\n\r\\\\') + b'="' +
+                               quote(xattr.get(pathname, attr), b'\0\n\r"\\\\') + b'"\n')
 
 def restore_xattrs(file_in):