Re: [PATCH] af_unix: closed SOCK_SEQPACKET socketpair must get SIGPIPE

From: Alexander Potapenko <glider@google.com>
Date: Tue, 15 Mar 2016 10:03:44 +0100

According to IEEE Std 1003.1, 2013, sending data to a SOCK_SEQPACKET
socketpair with MSG_NOSIGNAL flag set must result in a SIGPIPE if the
socket is no longer connected.

I used the following program to check the kernel behavior:

 ...

Signed-off-by: Alexander Potapenko <glider@google.com>

In the final analysis I don't think we can do this.

Properly working programs will start to mysteriously receive
signals in this situation and fail.

I'm sorry but I think we're stuck with this behavior.