tests/readlink.py

lazymanifest: add iterkeys() method

So we don't have to iteratate over (path, node, flags) tuples only to
throw away the node and flags.

#!/usr/bin/env python

import errno, os, sys

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

sys.exit(0)