SQL Plus: procedural problem

I am in search of the proper product to handle a problem:

A sql script that is something like:

DECLARE
BEGIN
some pl/sql processing
EXCEPTION
insert of error codes into an error table END;
....

more pl/sql processing
....

@purgrpts -- calling another sql script
....

exit

What I want to do is to look at the error table after the first pl/sql block finishes. If there are any errors logged I want the sql script to exit. So just after the "END;" statement there would be code something like:

select count(*) into errs from err where error_num = 12; if errs>0 then
  exit;
end if;

Of course, "exit" doesn't work this way in pl/sql. And there is no way to pass values from pl/sql to sql*plus. My question: what is the best product to handle something like this: oraperl, Pro*C, SQR (a reporting tool but it has a lot of other capabilities) or something else?

-- 
===========================================================================
Ed Steinman                            What the Zen Buddhist said to the
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University of Michigan
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