New submission from Gerrit Holl:
`shutil.copystat` fails on [panfs](https://en.wikipedia.org/wiki/Panasas#PanFS)
if the source file lacks u+w, because setting extended attributes results in a
`PermissionError`. This leads to higher end functions such as
`shutil.copytree` to fail. More seriously, it leads to `pip install .` to
fail, as I [reported here](https://github.com/pypa/pip/issues/2941):
In [55]: shutil.copystat("/src/on/panfs", "/tmp/fubar")
---------------------------------------------------------------------------
PermissionError Traceback (most recent call last)
<ipython-input-55-139c9fc77184> in <module>()
----> 1
shutil.copystat("/home/users/gholl/checkouts/pyatmlab/.git/objects/pack/pack-c1449559ec4287b3830efe2913608dddf2f21391.pack",
"/tmp/fubar")
/home/users/gholl/lib/python3.4/shutil.py in copystat(src, dst,
follow_symlinks)
211 else:
212 raise
--> 213 _copyxattr(src, dst, follow_symlinks=follow)
214
215 def copy(src, dst, *, follow_symlinks=True):
/home/users/gholl/lib/python3.4/shutil.py in _copyxattr(src, dst,
follow_symlinks)
151 try:
152 value = os.getxattr(src, name,
follow_symlinks=follow_symlinks)
--> 153 os.setxattr(dst, name, value,
follow_symlinks=follow_symlinks)
154 except OSError as e:
155 if e.errno not in (errno.EPERM, errno.ENOTSUP,
errno.ENODATA):
PermissionError: [Errno 13] Permission denied: '/tmp/fubar'
This occurs for any source file where the user write bit is not set.
Now, I'm not sure if this should be addressed in `pip`, `shutil.copytree`,
`shutil.copystat`, `setxattr`, `panfs`, or in none of the above. I'm reporting
it in different places; please close this issue if this is the wrong place.
----------
components: Library (Lib)
messages: 245985
nosy: Gerrit.Holl
priority: normal
severity: normal
status: open
title: os.setxattr PermissionError on panfs propagates up causing `copystat`,
`copytree`, and `pip install .` to fail unhepfully
versions: Python 2.7, Python 3.2, Python 3.3, Python 3.4
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue24538>
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