[issue41677] os.access() doesn't recognize lack of permissions on an SMB mountpoint

[Ronald Oussoren]

Ronald Oussoren  added the comment:

os.access is a think wrapper around C APIs (access(2), faccessat(2)).

I don't think this is a bug in Python, a shell command like "test -r /opt/xray" 
will almost certainly give the same result.

--
nosy: +ronaldoussoren

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[issue41677] os.access() doesn't recognize lack of permissions on an SMB mountpoint

[Michael Pelletier]

New submission from Michael Pelletier :

This emerged during a fault in a fileserver mounted on a Linux machine via a 
Samba client mount. The access to the mountpoint was being blocked by the 
fileserver, but os.access() wasn't able to recognize it as unreadable:

>>> os.access('/opt/xray', os.R_OK)
True
>>> s = os.stat('/opt/xray')
Traceback (most recent call last):
  File "", line 1, in 
PermissionError: [Errno 13] Permission denied: '/opt/xray'
>>>

Python version is 3.6.8.

--
components: IO
messages: 376156
nosy: mvpel
priority: normal
severity: normal
status: open
title: os.access() doesn't recognize lack of permissions on an SMB mountpoint
type: behavior
versions: Python 3.8

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