Distributed Name Service (DNS) Management Programming Manual

Summary of Changes to EMS on DSeries Operating Systems
Update for D-Series Operating Systems
I–8 46958 Tandem Computers Incorporated
Summary of Changes
to EMS on D-Series
Operating Systems
The changes from C-series to D-series operating system result in the following changes
to EMS:
New or revised event-message tokens
Revised EMS programs
Revised EMS procedures
New EMF functions
Changes in console output
Use of new system procedure calls
Restrictions in access to event message tokens across system boundaries
New or Revised Event-
Message Tokens
D-series event messages contain new or revised tokens in the header part of the
message and may also contain new tokens in the data portion of the message.
Changes in the PIN range and the new ways of defining process IDs are responsible
for most of the new or revised event-message tokens. The new header, data-portion,
and special tokens are defined in detail in the following paragraphs.
New Tokens in EMS Event
Message Headers
Every tokenized event message has an event header which contains tokens defining
the creator of the event and the node where the message was generated. The header
tokens identifying the process which created the event are new in D-series operating
systems to allow for references to larger PINs and new process descriptors. In
addition to these modified tokens, all D-series event messages contain new header
tokens. D-series event-message headers are of variable length, where as C-series
headers are of fixed length. The net effect of the header changes is that D-series
headers are about 24 bytes larger than C-series headers.
Table I-1 lists and describes the new D-series header tokens. It also lists the C-series
equivalent of each token, if there is one.
Table I-1. New/Revised Header Tokens for EMS
D-Series
Token Name
(ZEMS-TKN-)
Type
(ZSPI-TYP-) Content
C-Series
Equivalent
(ZEMS-TKN-)
Type
(ZSPI-TYP-)
EVTHDR-VSN ENUM Event header version. The
initial value of this token for
the D-series operating
system is 1.
-- --
PROC-DESC STRING Process handle of event
creator.
CRTPID CRTPID
NODENAME STRING Node name of event creator. -- --
NODENUM INT2 Node number of event
creator.
SYSTEM UINT