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SubjectRe: [PATCH] af_unix: closed SOCK_SEQPACKET socketpair must get SIGPIPE
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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.

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