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);

ARGUMENTS

dev Device number. 

events Event flags. 

anyyet Check current events only. 

reventsp Event flag pointer. 

pollhdrp Poll head pointer. 

INTERFACE LEVEL

SPARC architecture specific (SPARC DDI). 

DESCRIPTION

nochpoll() 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 VALUE

nochpoll() returns ENXIO. 

CONTEXT

nochpoll() can be called from user or interrupt context.

SEE ALSO

poll(2), cb_ops(9S)

SunOS 5.3 Writing Device Drivers

Sun Microsystems  —  Last change: 11 Apr 1991