From owner-freebsd-bugs@FreeBSD.ORG  Sun Oct 19 17:45:41 2003
Return-Path: <owner-freebsd-bugs@FreeBSD.ORG>
Delivered-To: freebsd-bugs@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id B8EF816A4B3
	for <freebsd-bugs@freebsd.org>; Sun, 19 Oct 2003 17:45:41 -0700 (PDT)
Received: from ns1.itga.com.au (ns1.itga.com.au [202.53.40.214])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 23E6F43F85
	for <freebsd-bugs@freebsd.org>; Sun, 19 Oct 2003 17:45:40 -0700 (PDT)
	(envelope-from gnb@itga.com.au)
Received: from lightning.itga.com.au (lightning.itga.com.au [192.168.71.20])
	by ns1.itga.com.au (8.12.9/8.12.9) with ESMTP id h9K0jDR5074809;
	Mon, 20 Oct 2003 10:45:13 +1000 (EST)
	(envelope-from gnb@itga.com.au)
Received: from lightning.itga.com.au (localhost [127.0.0.1])
	by lightning.itga.com.au (8.9.3/8.9.3) with ESMTP id KAA22822;
	Mon, 20 Oct 2003 10:45:12 +1000 (EST)
Message-Id: <200310200045.KAA22822@lightning.itga.com.au>
X-Mailer: exmh version 2.4 05/15/2001 with nmh-1.0.4
From: Gregory Bond <gnb@itga.com.au>
To: John Polstra <jdp@polstra.com>
In-reply-to: Your message of Sun, 19 Oct 2003 10:38:36 -0700.
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Date: Mon, 20 Oct 2003 10:45:12 +1000
Sender: gnb@itga.com.au
cc: Boris Nikolaus <boris@cs.tu-berlin.de>
cc: freebsd-bugs@freebsd.org
cc: John-Mark Gurney <gurney_j@efn.org>
Subject: Re: kern/45291: kevent(2) ignores timeout if nevents == 0 
X-BeenThere: freebsd-bugs@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Bug reports <freebsd-bugs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
	<mailto:freebsd-bugs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-bugs>
List-Post: <mailto:freebsd-bugs@freebsd.org>
List-Help: <mailto:freebsd-bugs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
	<mailto:freebsd-bugs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 20 Oct 2003 00:45:41 -0000

> They absolutely rely on this behavior of select.  If anybody changed
> it they'd have a whole lot of broken programs on their hands.  You may
> view it as a case of lazy programmers using the wrong system call for
> sleeping, but in fact it is just the proper and most sensible behavior
> for select to have at this boundary condition.

It's not just lazy either.  Up to and including 4.2 BSD, the _only_ way to get
sub-second sleeps was to use select() with no FDs.  SysV / AT&T varients
couldn't do it at all.  nanosleep() is a much later addition.

Even Solaris 2.6/2.8 has this in the nanosleep man page:
     ENOSYS      nanosleep() is not supported by this implementa-
                 tion.