Re: Graceful shutdown of TLS connection for blocking sockets

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On 09/10/2017 16:43, Thomas J. Hruska wrote:
On 10/9/2017 7:29 AM, Jakob Bohm wrote:
I suggest you find a good authoritative source for your claim
that select() should not be used with blocking sockets.

http://man7.org/linux/man-pages/man2/select.2.html

Section BUGS:

"Under Linux, select() may report a socket file descriptor as "ready for reading", while nevertheless a subsequent read blocks. This could for example happen when data has arrived but upon examination has wrong checksum and is discarded.  There may be other circumstances in which a file descriptor is spuriously reported as ready.  Thus it may be safer to use O_NONBLOCK on sockets that should not block."


Authoritative enough for you?

That must be a recent change then.  But certainly that is a bug
in Linux select, not in programs relying on the (long time)
documented correct behavior.

Enjoy

Jakob
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