From owner-freebsd-bugs@FreeBSD.ORG  Tue Jun  1 10:00:16 2010
Return-Path: <owner-freebsd-bugs@FreeBSD.ORG>
Delivered-To: freebsd-bugs@hub.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 61DEF1065675
	for <freebsd-bugs@hub.freebsd.org>;
	Tue,  1 Jun 2010 10:00:16 +0000 (UTC)
	(envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (unknown [IPv6:2001:4f8:fff6::28])
	by mx1.freebsd.org (Postfix) with ESMTP id 4F80D8FC2B
	for <freebsd-bugs@hub.freebsd.org>;
	Tue,  1 Jun 2010 10:00:16 +0000 (UTC)
Received: from freefall.freebsd.org (localhost [127.0.0.1])
	by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id o51A0GTP061472
	for <freebsd-bugs@freefall.freebsd.org>; Tue, 1 Jun 2010 10:00:16 GMT
	(envelope-from gnats@freefall.freebsd.org)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.14.4/8.14.4/Submit) id o51A0GeR061471;
	Tue, 1 Jun 2010 10:00:16 GMT (envelope-from gnats)
Date: Tue, 1 Jun 2010 10:00:16 GMT
Message-Id: <201006011000.o51A0GeR061471@freefall.freebsd.org>
To: freebsd-bugs@FreeBSD.org
From: =?UTF-8?B?0KXQsNGA0LjRgtC+0L3QvtCyINCV0LLQs9C10L3QuNC5?=
	<eugene.kharitonov@gmail.com>
Cc: 
Subject: Re: kern/147226: read(fd, buffer, len) returns -1 immediately, if
 len &gt;=2147483648
X-BeenThere: freebsd-bugs@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: =?UTF-8?B?0KXQsNGA0LjRgtC+0L3QvtCyINCV0LLQs9C10L3QuNC5?=
	<eugene.kharitonov@gmail.com>
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: Tue, 01 Jun 2010 10:00:16 -0000

The following reply was made to PR kern/147226; it has been noted by GNATS.

From: =?UTF-8?B?0KXQsNGA0LjRgtC+0L3QvtCyINCV0LLQs9C10L3QuNC5?=
 <eugene.kharitonov@gmail.com>
To: Bruce Cran <bruce@cran.org.uk>
Cc: bug-followup@FreeBSD.org
Subject: Re: kern/147226: read(fd, buffer, len) returns -1 immediately,  if
 len &gt;=2147483648
Date: Tue, 01 Jun 2010 13:19:46 +0400

 To summarize:
 
 1) `man 2 read` on my  FreeBSD (64-bit) says that read accepts only len 
 <= INT_MAX (it's my fault that I missed this before creating the issue);
 2) `man 2 read` on my Linux system states that up to SSIZE_MAX must be 
 accepted;
 3) POSIX states the same as (2).
 
 In other words this behavior is correct from FreeBSD's point of view, 
 but FreeBSD does not meet standards here.
 Did I get it correctly?
 
 PS. It sounds pretty strange (at least for me) that 64-bit system cannot 
 read 2Gb at a time. Also, surprisingly read(fd, buff, size_t len) 
 doesn't work with "size_t  len" ( which is 8 bytes long ) greater than 
 "INT_MAX" (which is 4 bytes long).
 
 Regards,
 Eugene