nulldev(9f) [hpux man page]

nulldev(9F)						   Kernel Functions for Drivers 					       nulldev(9F)

NAME

       nulldev - zero return function

SYNOPSIS

       #include <sys/conf.h>
       #include <sys/ddi.h>

       int nulldev();

INTERFACE LEVEL

       Architecture independent level 1 (DDI/DKI).

DESCRIPTION

       nulldev()  returns   0. It is intended to be used in the cb_ops(9S) data structure of a device driver for device entry points that do noth-
       ing.

RETURN VALUES

       nulldev() returns a 0.

CONTEXT

       nulldev() can be called from any context.

SEE ALSO

       nodev(9F), cb_ops(9S)

       Writing Device Drivers

SunOS 5.10							    11 Apr 1991 						       nulldev(9F)

identify(9E)							Driver Entry Points						      identify(9E)

NAME

       identify - determine if a driver is associated with a device

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI). This entry point is no longer supported. nulldev(9F) must be specified in the  dev_ops(9S) structure.

SEE ALSO

       nulldev(9F), dev_ops(9S)

ATTRIBUTES

       See attributes(5) for a description of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Stability Level 	     |Obsolete			   |
       +-----------------------------+-----------------------------+

WARNING

       For  Solaris  10  and  later  versions, drivers must remove the identify(9e) implementation to recompile. Otherwise, the compiler generates
       errors about DDI_IDENTIFIED and DDI_NOT_IDENTIFIED.

SunOS 5.11							    11 Apr 2003 						      identify(9E)