mcopyout man page on SmartOS

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MCOPYOUT(9F)							  MCOPYOUT(9F)

NAME
       mcopyout - Convert an M_IOCTL or M_IOCDATA message to an M_COPYOUT

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

       void mcopyout(mblk_t *mp, void *private, size_t size, void *useraddr,
	     mblk_t *dp);

INTERFACE LEVEL
       Solaris DDI specific (Solaris DDI).

PARAMETERS
       mp
		   M_IOCTL or M_IOCDATA message.

       private
		   Value to set the cq_private field of the copyreq(9S) to.

       size
		   Value to set the cq_size field of the copyreq(9S) to.

       useraddr
		   Optionally, the value to set the cq_addr field of the copy‐
		   req(9S) to.

       dp
		   Optionally, the payload to copy out.

DESCRIPTION
       The mcopyout() function converts an M_IOCTL or M_IOCDATA	 message  into
       an M_COPYOUT message using the supplied arguments.

       To  convert the message, mcopyout() changes the message type to M_COPY‐
       OUT, and its payload from a iocblk(9S)  to  a  copyreq(9S).  Since  the
       iocblk(9S)  and	copyreq(9S)  are  designed to overlay one another, the
       only fields which must be updated are cq_private, cq_size, and cq_addr,
       which  are  set	to the supplied values. If useraddr is passed as NULL,
       the M_IOCTL must be transparent and cq_addr is  assigned	 the  pointer-
       sized quantity found at mp->b_cont->b_rptr.

       If  dp  is not NULL, any trailing message blocks associated with mp are
       freed, mp->b_cont is reset to dp and dp->b_wptr is set to dp->b_rptr  +
       size. Otherwise, any trailing message blocks are unaffected.

RETURN VALUES
       None.

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

SEE ALSO
       mcopyin(9F), copyreq(9S), iocblk(9S)

       STREAMS Programming Guide

				  Jun 9, 2004			  MCOPYOUT(9F)
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