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

linkb - concatenate two message blocks

#include <sys/stream.h>
void linkb(mblk_t *mp1, mblk_t *mp2);

Architecture independent level 1 (DDI/DKI).

The linkb() function creates a new message by adding mp2 to the tail of mp1. The continuation pointer, b_cont, of mp1 is set to point to mp2.

The following figure describes how the linkb(m1, m2); function concatenates two message blocks, mp1 and mp2:

Printed copy or docs.sun.com shows a figure that describes how the linkb(m1, m2); function creates a new message by adding mp1 to the tail of mp2

mp1
The message to which mp2 is to be added. mblk_t is an instance of the msgb(9S) structure.

mp2

The message to be added.

The linkb() function can be called from user, interrupt, or kernel context.

See dupb(9F) for an example that uses linkb().

dupb(9F), unlinkb(9F), msgb(9S)

Writing Device Drivers

STREAMS Programming Guide

January 16, 2006 OmniOS