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


January 16, 2006 NOCHPOLL(9F)