From owner-freebsd-questions  Tue Nov 25 00:11:40 1997
Return-Path: <owner-freebsd-questions>
Received: (from root@localhost)
          by hub.freebsd.org (8.8.7/8.8.7) id AAA23807
          for questions-outgoing; Tue, 25 Nov 1997 00:11:40 -0800 (PST)
          (envelope-from owner-freebsd-questions)
Received: from woman.kitel.co.kr (woman.kitel.co.kr [210.116.210.106])
          by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id AAA23793
          for <freebsd-questions@FreeBSD.ORG>; Tue, 25 Nov 1997 00:11:33 -0800 (PST)
          (envelope-from swjeong@woman.kitel.co.kr)
Received: from woman.kitel.co.kr (localhost.kitel.co.kr [127.0.0.1])
	by woman.kitel.co.kr (8.8.7/8.8.7) with SMTP id RAA17841
	for <freebsd-questions@FreeBSD.ORG>; Tue, 25 Nov 1997 17:16:09 +0900 (KST)
	(envelope-from swjeong@woman.kitel.co.kr)
Message-ID: <347A8949.41C67EA6@woman.kitel.co.kr>
Date: Tue, 25 Nov 1997 17:16:09 +0900
From: Jeong Seong Won <swjeong@woman.kitel.co.kr>
Organization: kitel
X-Mailer: Mozilla 3.01 (X11; I; FreeBSD 2.2.5-RELEASE i386)
MIME-Version: 1.0
To: freebsd-questions@FreeBSD.ORG
Subject: close() returns -1 with EAGAIN
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Sender: owner-freebsd-questions@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

Manpages said that close() error is only EBADF or EINTR.

But, I got EAGAIN. 
What's the reason ?
How should I deal with this error ?