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Re: Detecting parent's termination
On Tue, Jan 31, 2012 at 03:04:56PM +0000, Emmanuel Dreyfus wrote:
> > I just made a test case, writing to a closed SOCK_STREAM socket yields a
> > SIGPIPE, while the same test with SOCK_SEQPACKET does not. That is a
> > bug.
> I was wrong: SOCK_SEQPACKET also fires a SIGPIPE, but the difference is
> that when doing a write(2), it returns immediatly, while SOCK_STREAM seems
> to return when the other side dies or consume the data. Due to the way
> my test case was written, I did not see the SIGPIPE with SOCK_SEQPACKET
> because the process terminated too early.
> This leads to another question: is it fine that write() on SOCK_SEQPACKET
> is by default in non blocking mode?
I don't understand. It's a socket. You write into a buffer, it's
transmitted asynchronously. How much you can write without blocking is
not specified and will depend on circumstances.
Without further evidence I suspect the timing difference you're seeing
depends mostly on the behavior of connect().
David A. Holland
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