dupmsg man page on OpenIndiana

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

NAME
       dupmsg - duplicate a message

SYNOPSIS
       #include <sys/stream.h>

       mblk_t *dupmsg(mblk_t *mp);

INTERFACE LEVEL
       Architecture independent level 1 (DDI/DKI).

PARAMETERS
       mp     Pointer to the message.

DESCRIPTION
       dupmsg()	 forms	a new message by copying the message block descriptors
       pointed to by  mp and linking them. dupb(9F) is called for each message
       block. The data blocks themselves are not duplicated.

RETURN VALUES
       If  successful,	 dupmsg()  returns a pointer to the new message block.
       Otherwise, it returns a	NULL pointer. A return value  of   NULL	 indi‐
       cates either memory depletion or the data block reference count, db_ref
       (see datab(9S)), has reached a limit  (255). See	 dupb(9F).

CONTEXT
       dupmsg() can be called from user, kernel, or interrupt context.

EXAMPLES
       Example 1 Using dupmsg()

       See copyb(9F) for an example using dupmsg().

SEE ALSO
       copyb(9F), copymsg(9F), dupb(9F), datab(9S)

       Writing Device Drivers

       STREAMS Programming Guide

SunOS 5.11			  11 Apr 1991			    dupmsg(9F)
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