NAME

nulldev − return function for insignificant entries in device switch tables. 

SYNOPSIS

#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 nothing. 

RETURN VALUES

nulldev() returns a 0. 

CONTEXT

nulldev() can be called from user or interrupt context.

SEE ALSO

nodev(9F), cb_ops(9S)

SunOS 5.1 Writing Device Drivers

SunOS 5.1/SPARC  —  Last change: 11 Apr 1991