STREAMS-UX Programmer's Guide (February 2007)

STREAMS Utilities Supported by HP-UX

Appendix B

186

NAME

msgdsize () – Gets the number of data bytes in a message.

SYNOPSIS

#include <sys/stream.h>

int msgdsize (mblk_t *mp);

PARAMETERS

Pointer to the message.

DESCRIPTION

msgdsize() returns the total number of bytes in a message block of type M_DATA.

RETURN VALUES

msgdsize() returns the number of bytes of data in the message.

CONSTRAINTS

msgdsize() can be called from thread or interrupt context. Spinlocks can be held across this call.