Manual Pages for UNIX Operating System command usage for man mcopyin

Kernel Functions for Drivers                          mcopyin(9F)



NAME
     mcopyin - Convert an M_IOCTL  or  M_IOCDATA  message  to  an
     M_COPYIN

SYNOPSIS
     #include 
     #include 



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


INTERFACE LEVEL
     Solaris DDI specific (Solaris DDI).

PARAMETERS
     mp          M_IOCTL or M_IOCDATA message.


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


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


     useraddr    Optionally, the value to which the cq_addr field
                 of copyreq(9S) is set.


DESCRIPTION
     The mcopyin() function converts an M_IOCTL or M_IOCDATA mes-
     sage into an M_COPYIN message using the supplied arguments.


     To convert the message, mcopyin() changes the  message  type
     to  M_COPYIN,  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,
     mp must be a transparent M_IOCTL, and  cq_addr  is  assigned
     the pointer-sized quantity found at mp->b_cont->b_rptr.


     Any trailing message blocks associated with mp are freed.

RETURN VALUES




SunOS 5.11          Last change: 9 June 2004                    1






Kernel Functions for Drivers                          mcopyin(9F)



     None.

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

SEE ALSO
     mcopyout(9F), copyreq(9S)


     STREAMS Programming Guide












































SunOS 5.11          Last change: 9 June 2004                    2