Message 267935 - Python tracker

Message267935

Author	larry
Recipients	Theodore Tso, dstufft, larry, ncoghlan, vstinner
Date	2016-06-08.23:59:22
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1465430362.75.0.993530083711.issue27266@psf.upfronthosting.co.za>
In-reply-to

Content
Wait a minute. If I read the code correctly, currently os.urandom() is implemented strictly using getrandom() on all platforms. And if block=false, it... returns an empty buffer? Am I reading that right? And what does it do on platforms that don't have a getrandom() call? Does os.urandom() literally always raise an exception on OS X or FreeBSD? This is so crazy. Surely I'm misunderstanding the code. What am I missing?

Content

Wait a minute.  If I read the code correctly, currently os.urandom() is implemented strictly using getrandom() *on all platforms*.  And if block=false, it... returns an empty buffer?  Am I reading that right?

And what does it do on platforms that don't have a getrandom() call?  Does os.urandom() literally always raise an exception on OS X or FreeBSD?

This is so crazy.  Surely I'm misunderstanding the code.  What am I missing?

History
Date	User	Action	Args
2016-06-08 23:59:23	larry	set	recipients: + larry, ncoghlan, vstinner, dstufft, Theodore Tso
2016-06-08 23:59:22	larry	set	messageid: <1465430362.75.0.993530083711.issue27266@psf.upfronthosting.co.za>
2016-06-08 23:59:22	larry	link	issue27266 messages
2016-06-08 23:59:22	larry	create