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Resource summary extension on EP/IX

When started with the flag "-I", the Bourne shell on EP/IX 2.2.1AA
prints a terse resource summary after each external command.
After calling a built-in, there's no such output.
The flag is not documented in the online manual, but only in the printed version.

Example: 

    $ sh -I
    $ w
    [...]
    [0.080 1 0 16 13]
    $ w
    [...]
    [0.080 0 0 3 3]
    $ echo built-in
    built-in
    $
Meaning of the columns:

The output is related to the session, because the 2nd value is not affected by exiting and restarting the shell itself - but only by restarting the session or additionaly starting another session.

2006-11-20