Message 382397 - Python tracker

Message382397

Author	vstinner
Recipients	SpecLad, giampaolo.rodola, njs, oconnor663, vstinner
Date	2020-12-03.09:42:54
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1606988574.7.0.626676984683.issue38630@roundup.psfhosted.org>
In-reply-to

Content
On Linux, a pidfd file descriptor can be created with os.pidfd_open() (added to Python 3.9). It would avoid even more race conditions. The best would be to request a pidfd file descriptor directly when we spawn the process which is possible on recent Linux kernel versions. > we should probably document it clearly in Popen.send_signal() and all of its callers that these functions might reap the child. Feel free to propose a PR to document the behavior. I'm not sure of what you mean by send_signal() which "reaps" the child process. See also bpo-40550. Anyway, this issue and bpo-40550 are closed. I suggest to open a new issue to enhance the documentation.

Content

On Linux, a pidfd file descriptor can be created with os.pidfd_open() (added to Python 3.9). It would avoid even more race conditions. The best would be to request a pidfd file descriptor directly when we spawn the process which is possible on recent Linux kernel versions.

> we should probably document it clearly in Popen.send_signal() and all of its callers that these functions might reap the child.

Feel free to propose a PR to document the behavior.

I'm not sure of what you mean by send_signal() which "reaps" the child process.

See also bpo-40550.

Anyway, this issue and bpo-40550 are closed. I suggest to open a new issue to enhance the documentation.

History
Date	User	Action	Args
2020-12-03 09:42:54	vstinner	set	recipients: + vstinner, giampaolo.rodola, njs, SpecLad, oconnor663
2020-12-03 09:42:54	vstinner	set	messageid: <1606988574.7.0.626676984683.issue38630@roundup.psfhosted.org>
2020-12-03 09:42:54	vstinner	link	issue38630 messages
2020-12-03 09:42:54	vstinner	create