tests/readlink.py

hook: raise a more specialized HookAbort exception when a hook fails

We need to gracefully handle some aborts for pushkey, especially
because it leads to a user-facing crash over the wireprotocols. So we
need a more specialized exception to catch.

#!/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)