Message 257351 - Python tracker

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In-reply-to
Author	serhiy.storchaka
Recipients	benhoyt, serhiy.storchaka, vstinner
Date	2016年01月02日.17:48:15
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1451756896.24.0.122789607597.issue25994@psf.upfronthosting.co.za>

Content
os.scandir() opens a file descriptor and closes it only in its destructor. This can causes file descriptor leaks in Python implementations without reference counting and if the scandir iterator becomes a part of reference loop or long living object. Since the number of open file descriptors is limited, this can leads to problems. We need to add the close() method to the scandir iterator (as in files and generators). It would be useful also to make it a context manager. In 3.5 we have to add a warning about this behavior.

Content

os.scandir() opens a file descriptor and closes it only in its destructor. This can causes file descriptor leaks in Python implementations without reference counting and if the scandir iterator becomes a part of reference loop or long living object. Since the number of open file descriptors is limited, this can leads to problems.
We need to add the close() method to the scandir iterator (as in files and generators). It would be useful also to make it a context manager.
In 3.5 we have to add a warning about this behavior.

History
Date	User	Action	Args
2016年01月02日 17:48:16	serhiy.storchaka	set	recipients: + serhiy.storchaka, vstinner, benhoyt
2016年01月02日 17:48:16	serhiy.storchaka	set	messageid: <1451756896.24.0.122789607597.issue25994@psf.upfronthosting.co.za>
2016年01月02日 17:48:16	serhiy.storchaka	link	issue25994 messages
2016年01月02日 17:48:15	serhiy.storchaka	create

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