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Merge pull request ansible#14374 from robinro/fix-mount-without-permi…
…ssion-bug add ismount function in module_utils
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# This code is part of Ansible, but is an independent component. | ||
# This particular file snippet, and this file snippet only, is based on | ||
# Lib/posixpath.py of cpython | ||
# It is licensed under the PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2 | ||
# | ||
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# ("PSF"), and the Individual or Organization ("Licensee") accessing and | ||
# otherwise using this software ("Python") in source or binary form and | ||
# its associated documentation. | ||
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# 2. Subject to the terms and conditions of this License Agreement, PSF hereby | ||
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# analyze, test, perform and/or display publicly, prepare derivative works, | ||
# distribute, and otherwise use Python alone or in any derivative version, | ||
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# | ||
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import os | ||
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def ismount(path): | ||
"""Test whether a path is a mount point | ||
clone of os.path.ismount (from cpython Lib/posixpath.py) | ||
fixed to solve https://github.com/ansible/ansible-modules-core/issues/2186 | ||
and workaround non-fixed http://bugs.python.org/issue2466 | ||
this should be rewritten as soon as python issue 2466 is fixed | ||
probably check for python version and use os.path.ismount if fixed | ||
to remove replace in this file ismount( -> os.path.ismount( and remove this | ||
function""" | ||
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try: | ||
s1 = os.lstat(path) | ||
except OSError: | ||
# the OSError should be handled with more care | ||
# it could be a "permission denied" but path is still a mount | ||
return False | ||
else: | ||
# A symlink can never be a mount point | ||
if os.path.stat.S_ISLNK(s1.st_mode): | ||
return False | ||
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parent = os.path.join(path, os.path.pardir) | ||
parent = os.path.realpath(parent) | ||
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try: | ||
s2 = os.lstat(parent) | ||
except OSError: | ||
# one should handle the returned OSError with more care to figure | ||
# out whether this is still a mount | ||
return False | ||
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if s1.st_dev != s2.st_dev: | ||
return True # path/.. on a different device as path | ||
if s1.st_ino == s2.st_ino: | ||
return True # path/.. is the same i-node as path, i.e. path=='/' | ||
return False |