xref: /titanic_51/usr/src/man/man9f/nochpoll.9f (revision 61dc244f52b4962ea505abec7e6cbade980d3c53)
te
Copyright (c) 2006, Sun Microsystems, Inc., All Rights Reserved
The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
NOCHPOLL 9F "Jan 16, 2006"
NAME
nochpoll - error return function for non-pollable devices
SYNOPSIS

#include <sys/ddi.h>
#include <sys/sunddi.h>



int nochpoll(dev_t dev, short events, int anyyet, short *reventsp,
 struct pollhead **pollhdrp);
INTERFACE LEVEL

Solaris DDI specific (Solaris DDI).

PARAMETERS
dev

Device number.

events

Event flags.

anyyet

Check current events only.

reventsp

Event flag pointer.

pollhdrp

Poll head pointer.

DESCRIPTION

The nochpoll() function is a routine that simply returns the value ENXIO. It is intended to be used in the cb_ops(9S) structure of a device driver for devices that do not support the poll(2) system call.

RETURN VALUES

The nochpoll() function returns ENXIO.

CONTEXT

The nochpoll() function can be called from user, interrupt, or kernel context.

SEE ALSO

poll(2), chpoll(9E), cb_ops(9S)

Writing Device Drivers