Reference Guide

ZCOM C I/F Library Routines
ZREAD (3X)
Chapter 4300
3. A System Event Message (SEM) is generated by the ZCOM
subsystem in response to special events that occur within the ZCOM
subsystem. A program may choose to receive event messages by
supplying its primary ZLU in a zevent_rcvr call. All ZCOM Event
messages are divided into a header and event specific data section.
The header is defined for all types of Event messages while the data
portion depends on the ZCOM Event Message type. Refer to the
subsection ‘System Event Messages’ in the Multiprotocol ACC
Programmers’ Reference Guide for more information. The SEM’s
structure is defined in /opt/acc/include/zcom/zcomsys.h.
4. The tag parameters (mhp->mid.mtagw1 and mtagw2) are the tag
parameters from the originating zsend(3X) call.