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[Duplicity-talk] Usage of python fasteners on cygwin

From: address@hidden
Subject: [Duplicity-talk] Usage of python fasteners on cygwin
Date: Tue, 8 Jun 2021 09:53:09 +0300

I want to use duplicity to manage NTFS backups from cygwin. There appears to be a problem with lockfiless because fasteners is using fnctl in operating the filesystems, and is unable to release because the object it acquires is not a valid lock:

It throws on release:

Typeerror: The argument must be an int or have a fileno method.


1. Do you know when Duplicity starting using fasteners? I think maybe it used something else in 0.6 because I dont remember if I always recieved locking errors. 
2. What is the intended/ideal implementation of fasteners on cygwin? 
3. Is cygwin suppose to behave like a POSIX filesystem or is the expected interaction with the FS for C/Python programs running in cygwin through the Win APIs?

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