Manual Pages for UNIX Operating System command usage for man nulldev

Kernel Functions for Drivers                          nulldev(9F)



NAME
     nulldev - zero return function

SYNOPSIS
     #include 
     #include 



     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 nothing.

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 5.11          Last change: 11 Apr 1991                    1