bsd 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

       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 VALUES

       nochpoll() returns  ENXIO.

CONTEXT

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

SEE ALSO

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

       Writing Device Drivers

SunOS 5.10							    11 Oct 1995 						      nochpoll(9F)