From owner-freebsd-hackers@FreeBSD.ORG  Mon Jun 16 11:42:09 2003
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Date: Mon, 16 Jun 2003 14:39:36 -0400
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On Mon, 16 Jun 2003 10:11:10 -0700
Joshua Oreman <oremanj@www.get-linux.org> wrote:

> On Mon, Jun 16, 2003 at 11:44:15AM +0100 or thereabouts, Tony Finch seemed to write:
> > 
> > Select doesn't work with files.
> 
> Really? `man 2 select' says nothing about that. It just talks about
> 'file descriptors'. Now if it said 'socket descriptors' or 'non-file
> file descriptors' I would understand, but I don't think that that statement
> is implied by the man page. Is there something I'm missing?

A file descriptor that references an ordinary vnode (file or directory)
will always be "ready for I/O", because unlike a socket or pipe, it never
needs to block in order to tell you if it's at EOF.

So, while it works, and is logical, it isn't terribly useful.