From owner-svn-src-head@freebsd.org  Thu May  3 02:42:13 2018
Return-Path: <owner-svn-src-head@freebsd.org>
Delivered-To: svn-src-head@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id CAA49FBE27F;
 Thu,  3 May 2018 02:42:13 +0000 (UTC)
 (envelope-from kevans@FreeBSD.org)
Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org
 [IPv6:2610:1c1:1:606c::19:3])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "mxrelay.nyi.freebsd.org",
 Issuer "Let's Encrypt Authority X3" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id 781CF6F271;
 Thu,  3 May 2018 02:42:13 +0000 (UTC)
 (envelope-from kevans@FreeBSD.org)
Received: from repo.freebsd.org (repo.freebsd.org
 [IPv6:2610:1c1:1:6068::e6a:0])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 7304419A30;
 Thu,  3 May 2018 02:42:13 +0000 (UTC)
 (envelope-from kevans@FreeBSD.org)
Received: from repo.freebsd.org ([127.0.1.37])
 by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w432gD7r057033;
 Thu, 3 May 2018 02:42:13 GMT (envelope-from kevans@FreeBSD.org)
Received: (from kevans@localhost)
 by repo.freebsd.org (8.15.2/8.15.2/Submit) id w432gDU1057032;
 Thu, 3 May 2018 02:42:13 GMT (envelope-from kevans@FreeBSD.org)
Message-Id: <201805030242.w432gDU1057032@repo.freebsd.org>
X-Authentication-Warning: repo.freebsd.org: kevans set sender to
 kevans@FreeBSD.org using -f
From: Kyle Evans <kevans@FreeBSD.org>
Date: Thu, 3 May 2018 02:42:13 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: svn commit: r333192 - head/lib/libc/sys
X-SVN-Group: head
X-SVN-Commit-Author: kevans
X-SVN-Commit-Paths: head/lib/libc/sys
X-SVN-Commit-Revision: 333192
X-SVN-Commit-Repository: base
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-BeenThere: svn-src-head@freebsd.org
X-Mailman-Version: 2.1.25
Precedence: list
List-Id: SVN commit messages for the src tree for head/-current
 <svn-src-head.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/svn-src-head>,
 <mailto:svn-src-head-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/svn-src-head/>
List-Post: <mailto:svn-src-head@freebsd.org>
List-Help: <mailto:svn-src-head-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/svn-src-head>,
 <mailto:svn-src-head-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 03 May 2018 02:42:14 -0000

Author: kevans
Date: Thu May  3 02:42:13 2018
New Revision: 333192
URL: https://svnweb.freebsd.org/changeset/base/333192

Log:
  fcntl(2): Vaguely document that ENOTTY is possible, with light examples
  
  Reported by:	vs (2006, FreeBSD 6.1-BETA3)
  Reported by:	me (2018, angry debugging session)
  MFC after:	1 month

Modified:
  head/lib/libc/sys/fcntl.2

Modified: head/lib/libc/sys/fcntl.2
==============================================================================
--- head/lib/libc/sys/fcntl.2	Thu May  3 01:23:42 2018	(r333191)
+++ head/lib/libc/sys/fcntl.2	Thu May  3 02:42:13 2018	(r333192)
@@ -28,7 +28,7 @@
 .\"     @(#)fcntl.2	8.2 (Berkeley) 1/12/94
 .\" $FreeBSD$
 .\"
-.Dd July 7, 2016
+.Dd May 2, 2018
 .Dt FCNTL 2
 .Os
 .Sh NAME
@@ -572,6 +572,14 @@ process are already in use,
 or no file descriptors greater than or equal to
 .Fa arg
 are available.
+.It Bq Er ENOTTY
+The
+.Fa fd
+argument is not a valid file descriptor for the requested operation.
+This may be the case if
+.Fa fd
+is a device node, or a descriptor returned by
+.Xr kqueue 2 .
 .It Bq Er ENOLCK
 The argument
 .Fa cmd