Re: Cleanup after program failure

[rob@xxxxxxxxx]

Remove the intermediate CL.  Have the change of the library list done
within the calling program.

Or make the CL simple enough that a failure of program B does not affect
the library list handling.  Test the CL by calling some programs guaranteed
to fail - (divide by zero or some such technique).

Rob Berendt

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Remember the Cole!


                                                                                
                                         
                    Matthias Oertli                                             
                                         
                    <oertlim@s054.aone.        To:     midrange-l@midrange.com  
                                         
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                    Sent by:                   Subject:     Cleanup after 
program failure                                
                    owner-midrange-l@mi                                         
                                         
                    drange.com                                                  
                                         
                                                                                
                                         
                                                                                
                                         
                    05/02/01 07:51 AM                                           
                                         
                    Please respond to                                           
                                         
                    MIDRANGE-L                                                  
                                         
                                                                                
                                         
                                                                                
                                         




Hi guys,

I've been asked to code a call to program B from within program A.

The difficulty is that program B needs a different environment to
program A: A slight change in the library list and a modified data
area.

This is easily doable, make program A call a small CL which sets up
everything, then calls program B and when it returns undoes the
changes and finally returns to program A.

My problem is this: If program B (or the CL) fails for whatever
reason, program A regains control without the environment having been
restored to what it should be which could mean disaster.

How can I guard against this situation?

Thanks for your help.
Best regards,
Matthias

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Matthias Oertli   <oertlim@s054.aone.net.au>
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