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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]
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 "16 Jan 2006" "SunOS 5.11" "Kernel Functions for Drivers"
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