1nochpoll(9F)             Kernel Functions for Drivers             nochpoll(9F)
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NAME

6       nochpoll - error return function for non-pollable devices
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SYNOPSIS

9       #include <sys/ddi.h>
10       #include <sys/sunddi.h>
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14       int nochpoll(dev_t dev, short events, int anyyet, short *reventsp,
15             struct pollhead **pollhdrp);
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INTERFACE LEVEL

19       Solaris DDI specific (Solaris DDI).
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PARAMETERS

22       dev         Device number.
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25       events      Event flags.
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28       anyyet      Check current events only.
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31       reventsp    Event flag pointer.
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34       pollhdrp    Poll head pointer.
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DESCRIPTION

38       The  nochpoll()  function  is  a  routine that simply returns the value
39       ENXIO. It is intended to be used  in  the  cb_ops(9S)  structure  of  a
40       device driver for devices that do not support the poll(2) system call.
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RETURN VALUES

43       The nochpoll() function returns ENXIO.
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CONTEXT

46       The  nochpoll()  function can be called from user, interrupt, or kernel
47       context.
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SEE ALSO

50       poll(2), chpoll(9E), cb_ops(9S)
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53       Writing Device Drivers
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57SunOS 5.11                        16 Jan 2006                     nochpoll(9F)