Message 95487 - Python tracker

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In-reply-to
Author	doko
Recipients	doko
Date	2009年11月19日.16:20:21
SpamBayes Score	0.00038128294
Marked as misclassified	No
Message-id	<1258647622.46.0.810277433722.issue7360@psf.upfronthosting.co.za>

Content
[forwarded from http://bugs.debian.org/451733] the mailbox._singlefileMailbox class is not safe with concurrent access, because mailbox._singlefileMailbox.flush() replaces the underlying file with a new copy by constructing a temporary file and then renaming it. This breaks all other class instances which have this mailbox open. I'm attaching a script demonstrating the problem. I think it's a bad idea to use rename(2) here; overwriting the file content would fix the race condition, and #451274 too[1].

Content

[forwarded from http://bugs.debian.org/451733]
the mailbox._singlefileMailbox class is not safe with concurrent access,
because mailbox._singlefileMailbox.flush() replaces the underlying file
with a new copy by constructing a temporary file and then renaming it.
This breaks all other class instances which have this mailbox open. I'm
attaching a script demonstrating the problem. 
I think it's a bad idea to use rename(2) here; overwriting the file
content would fix the race condition, and #451274 too[1].

History
Date	User	Action	Args
2009年11月19日 16:20:22	doko	set	recipients: + doko
2009年11月19日 16:20:22	doko	set	messageid: <1258647622.46.0.810277433722.issue7360@psf.upfronthosting.co.za>
2009年11月19日 16:20:21	doko	link	issue7360 messages
2009年11月19日 16:20:21	doko	create

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