New submission from Kim Gräsman:
os.unlink currently raises a WindowsError (Access Denied) if I attempt to
unlink an NTFS junction point.
It looks trivial to allow Py_DeleteFileW [1] to remove junction points as well
as proper symbolic links, as far as I can tell.
For example, the ntfslink-python library [2] only checks if both
FILE_ATTRIBUTE_DIRECTORY and FILE_ATTRIBUTE_REPARSE_POINT are set.
RemoveDirectoryW is documented to handle junction points transparently, so it
should just be a matter of passing the path on if it's a junction point or a
symbolic link.
My motivation for this is that I have used external tools to create junction
points, and am now switching to symbolic links. When deleting a directory, I
need to do:
try:
os.unlink(link_path)
except WindowsError as detail:
# BACKWARD COMPATIBILITY HACK
if detail.winerror == 5:
_delete_junction_point(link_path)
else:
raise
which is a little funky. It seems like os.unlink semantics work just as well
for junction points, even if they can't be created with os.symlink.
Love it/hate it?
[1] http://hg.python.org/cpython/file/44f455e6163d/Modules/posixmodule.c#l4105
[2]
https://github.com/Juntalis/ntfslink-python/blob/2f6ff903f9b22942de8aa93a32a3d817124f359e/ntfslink/internals/__init__.py#L32
----------
components: Windows
messages: 191945
nosy: Kim.Gräsman
priority: normal
severity: normal
status: open
title: Have os.unlink remove junction points
type: behavior
versions: Python 3.3
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<http://bugs.python.org/issue18314>
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