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

NAME

mcopymsg - Copy message contents into a buffer and free message

SYNOPSIS

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


void mcopymsg(mblk_t *mp, void *buf);

INTERFACE LEVEL

illumos DDI specific (illumos DDI).

PARAMETERS

mp
Message to be copied.


buf
Buffer in which to copy.

DESCRIPTION

The mcopymsg() function copies the contents of the specified message
into the specified buffer. If the message consists of more than a
single message block, the contents of each message block are placed
consecutively into the buffer. After copying the message contents to
buf, mcopymsg() frees the message mp.


The provided buffer must be large enough to accommodate the message.
If the buffer is not large enough, the results are unspecified. The
msgsize(9F) function can be used to calculate the total size of the
message beforehand.

RETURN VALUES

None.

CONTEXT

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

SEE ALSO

freemsg(9F), msgsize(9F)


STREAMS Programming Guide

October 16, 2007 MCOPYMSG(9F)