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4.2.3.2 Session Functions
While working at the terminal, you are communicating with TSO/E and
Session Manager. In addition, you can receive messages from other TSO/E
users, the operator, and from jobs you're executing. These three means of
communication (TSO/E, Session Manager, and messages) are called session
functions. The session functions receive the input you enter at the
keyboard and generate output to you. Session Manager places the input and
output in streams, either the default streams or the streams that you
specify on the CHANGE.FUNCTION command.
TSO/E has an input and an output stream:
- TSOIN is the input stream for the TSO/E function. Information placed
in this stream is interpreted as TSO/E commands or input to programs.
While a command is executing in this stream, Session Manager
highlights it. Otherwise, when the command has completed execution, it
is displayed at normal intensity.
- TSOOUT is the output stream for the TSO/E function. All output
generated by the TSO/E commands and programs is placed in this stream.
The TSOOUT stream also contains a copy of the TSO/E commands from the
TSOIN stream, thus creating a complete record of your TSO/E session.
(The commands from the TSOIN stream appear highlighted in this
stream.) In addition, the MESSAGE (MSG) function places in the TSOOUT
stream any messages you receive from other TSO/E users, the operator,
or from background jobs. As a result, the messages are interleaved
with the TSO/E session input and output.
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