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msgdsize(9r)


NAME

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


SYNOPSIS

  #include <sys/stream.h>

  int msgdsize(
	  MBLKP message_block_ptr );


ARGUMENTS

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


DESCRIPTION

  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

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

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