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

NAME

msgsize - Return the total number of bytes in a message

SYNOPSIS

#include <sys/stream.h>
#include <sys/strsun.h>


size_t msgsize(mblk_t *mp);

INTERFACE LEVEL

illumos DDI specific (illumos DDI)

PARAMETERS

mp
Message to be evaluated.

DESCRIPTION

The msgsize() function counts the number of bytes in a message,
regardless of the data type of the underlying data blocks.

RETURN VALUES

Number of bytes in the message.

CONTEXT

This function can be called from user, kernel or interrupt context.

SEE ALSO

msgdsize(9F)


STREAMS Programming Guide

June 9, 2004 MSGSIZE(9F)