NAME    [Toc]    [Back]

       msgdsize  - STREAMS: Returns the number of bytes in a message

SYNOPSIS    [Toc]    [Back]

       #include <sys/stream.h>

       int msgdsize(
               MBLKP message_block_ptr );

ARGUMENTS    [Toc]    [Back]

       Specifies a pointer to the message block to be  evaluated.
       The  typedef MBLKP is an alternate name for typedef struct
       msgb *.

DESCRIPTION    [Toc]    [Back]

       The msgdsize interface counts the number  of  bytes  in  a
       data  message. Only bytes included in the data blocks with
       a message type of M_DATA (ordinary data)  is  included  in
       the count.

RETURN VALUES    [Toc]    [Back]

       Upon successful completion, the msgdsize interface returns
       the number of data bytes in a  message,  expressed  as  an
       integer.



                                                     msgdsize(9r)