opensolaris man page for nochpoll

nochpoll(9F)						   Kernel Functions for Drivers 					      nochpoll(9F)

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

SunOS 5.11							    16 Jan 2006 						      nochpoll(9F)