-.\" $OpenBSD: poll.2,v 1.35 2017/02/14 17:51:14 tb Exp $
+.\" $OpenBSD: poll.2,v 1.36 2018/08/18 16:55:30 cheloha Exp $
.\"
.\" Copyright (c) 1994 Jason R. Thorpe
.\" All rights reserved.
.\" 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: February 14 2017 $
+.Dd $Mdocdate: August 18 2018 $
.Dt POLL 2
.Os
.Sh NAME
flags may be used to detect when out-of-band socket data may be read
without blocking.
.Pp
-In addition to I/O multiplexing,
-.Fn poll
-can be used to generate simple timeouts.
-This functionality may be achieved by passing a null pointer for
-.Fa fds .
-.Pp
The
.Fn ppoll
function is similar to