linux-kernel - Re: bug in select() in linux

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Message-ID: <45219fb00703120815l79262977va0b7e3b8e59921de@mail.gmail.com>
Date:	Mon, 12 Mar 2007 16:15:15 +0100
From:	"Lluís Batlle" <viriketo@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: Re: bug in select() in linux

Wouldn't it be better for all of us that select() doesn't block on
write(), unless there is a socket writting buffer fulfilled? It will
be consistent with the select() specification.

2007/3/12, Alistair John Strachan <s0348365@....ed.ac.uk>:
> On Monday 12 March 2007 15:02, Lluís Batlle wrote:
> > Oh, of course you're right. I was inside too much layers to think of
> > the tcp protocol, and I did not pay attention to it.
> >
> > Maybe something could be added to the manpage anyway.
> >
> > The bad thing is that there's no way I can use a socket for writing
> > using select() if that connection has been half-closed by the other
> > end. Moo.
>
> This question comes up from time to time. I think the answer is
> ultimately "select() sucks, use poll()".
>
> I can't exactly remember the details, but I believe POLLHUP or POLLOUT as
> flags do what you want.
>
> --
> Cheers,
> Alistair.
>
> Final year Computer Science undergraduate.
> 1F2 55 South Clerk Street, Edinburgh, UK.
>
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