bsd man page for nulldev

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)