From a4db8948d5d35e47b82d7b2e43a35c935ba6c3ca Mon Sep 17 00:00:00 2001
From: guenther <guenther@openbsd.org>
Date: Sat, 17 Sep 2016 01:01:42 +0000
Subject: Restore warnings about multiple process waiting on same fd

requested by mpf@
ok deraadt tedu@
---
 lib/libc/sys/poll.2   | 10 ++++++++--
 lib/libc/sys/select.2 | 10 ++++++++--
 2 files changed, 16 insertions(+), 4 deletions(-)

(limited to 'lib/libc')

diff --git a/lib/libc/sys/poll.2 b/lib/libc/sys/poll.2
index fd276bf8ad6..1c622a450ab 100644
--- a/lib/libc/sys/poll.2
+++ b/lib/libc/sys/poll.2
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: poll.2,v 1.33 2016/06/07 16:18:56 tedu Exp $
+.\"	$OpenBSD: poll.2,v 1.34 2016/09/17 01:01:42 guenther Exp $
 .\"
 .\" Copyright (c) 1994 Jason R. Thorpe
 .\" All rights reserved.
@@ -28,7 +28,7 @@
 .\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\"
-.Dd $Mdocdate: June 7 2016 $
+.Dd $Mdocdate: September 17 2016 $
 .Dt POLL 2
 .Os
 .Sh NAME
@@ -367,3 +367,9 @@ Similarly, the
 and
 .Dv POLLRDBAND
 flags are also equivalent.
+.Pp
+Internally to the kernel,
+.Fn poll
+and
+.Fn ppoll
+work poorly if multiple processes wait on the same file descriptor.
diff --git a/lib/libc/sys/select.2 b/lib/libc/sys/select.2
index 833f415359b..5f55f3d6a83 100644
--- a/lib/libc/sys/select.2
+++ b/lib/libc/sys/select.2
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: select.2,v 1.41 2016/06/07 16:18:56 tedu Exp $
+.\"	$OpenBSD: select.2,v 1.42 2016/09/17 01:01:42 guenther Exp $
 .\"	$NetBSD: select.2,v 1.5 1995/06/27 22:32:28 cgd Exp $
 .\"
 .\" Copyright (c) 1983, 1991, 1993
@@ -30,7 +30,7 @@
 .\"
 .\"     @(#)select.2	8.2 (Berkeley) 3/25/94
 .\"
-.Dd $Mdocdate: June 7 2016 $
+.Dd $Mdocdate: September 17 2016 $
 .Dt SELECT 2
 .Os
 .Sh NAME
@@ -293,3 +293,9 @@ and using
 .Fn timersub
 (as described in
 .Xr getitimer 2 ) .
+.Pp
+Internally to the kernel,
+.Fn select
+and
+.Fn pselect
+work poorly if multiple processes wait on the same file descriptor.
-- 
cgit v1.2.3-59-g8ed1b