odd behavior on select() after shutdown()

[Yoshihiko Sarumaru]

Hi,

2010/5/18 Kostik Belousov <kostikbel at gmail.com>:
> On Tue, May 18, 2010 at 01:08:50AM +0900, Yoshihiko Sarumaru wrote:
>> Hi all,
>>
>> Select(2) has three arguments to get socket status for read, write and except.
>> After upgrading to 8.0-RELEASE, select() after shutdown(SHUT_WR) returns with
>> the status exceptfds is set. It means out-of-bound data can be read
>> from the socket,
>> but recv() with OOB flag returns ECONNRESET, and no packets with urgent flag
>> was observed by tcpdump.
>> It seems strange for me, but is it an intentional change on 8.x ?

> The patch below would fix the problem at hand. I am wondering what
> unintended consequences it might have.

It works perfect for me on 8.0-RELEASE, thanks!
I can't see how much this change has side effects,
but is it commitable to current or stable?

Kib, it seems you had changed some code using POLLHUP in uipc_socket.c.
I'm not sure it is related to this issue, but could you give us your comments?

thanks,
- yoshihiko