nochpoll man page on SunOS

nochpoll man page on SunOS

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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 5.10			  16 Jan 2006			  nochpoll(9F)

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