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Chapter 29. Writing a “good night” program
You can use the GNTRAN system initialization parameter to specify a “good night”
transaction that you want CICS to invoke when a user’s terminal-timeout period
expires. The default value for GNTRAN is 'NO', which means that CICS does not
schedule a “good night” transaction, but instead tries to sign off the terminal user.
(Whether or not the sign off is successful depends on the value of the SIGNOFF
attribute on the terminal’s TYPETERM definition.)
Notes:
1. Any transaction that you specify on the GNTRAN parameter must be able to
handle the type of communication area it is passed when terminal timeout
occurs. The CICS sign-off transaction, CESF, can do this, but CESN and all
other CICS-supplied transactions cannot.
2. GNTRAN=NO must be specified if TCAM terminals are being used and users’
terminal-timeout values are specified in their RACF profiles.
For further information about GNTRAN, see the
CICS System Definition Guide
.
Writing your own “good night” program allows you to include functions in addition to,
or instead of, sign-off. For example, your program could prompt the terminal user to
enter their password, and allow the session to continue if the correct response is
received. CICS supplies a sample “good night” program, DFH0GNIT, that
demonstrates this, and a sample transaction definition, GNIT, that points to
DFH0GNIT.
CICS passes the “good night” program a parameter list in the communications area
shown in Figure 106 on page 734. If a terminal times out during a
pseudoconversational transaction, your program could, using information in the
parameter list:
v Ask for and check a response from the user
v Restore the screen left by the timed-out transaction
v Restore the cursor position
v Receive the communications area of the timed-out transaction, which is passed
to the “good night” transaction as an input message
v Return with the TRANSID of the next transaction in the conversation.
© Copyright IBM Corp. 1977, 1999 733
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