tests/readlink.py

tests: stabilize ssh tests on Windows

This seems like a somewhat common type of failure (double vs single quote), so
I'm interested in ideas about how to avoid this.  I doubt that we should
automatically fall back from single quote to double quote, like with '/' vs '\'.

#!/usr/bin/env python

from __future__ import absolute_import, print_function

import errno
import os
import sys

for f in sys.argv[1:]:
    try:
        print(f, '->', os.readlink(f))
    except OSError as err:
        if err.errno != errno.EINVAL:
            raise
        print(f, '->', f, 'not a symlink')

sys.exit(0)