Paul Jackson [off-list ref] wrote:

It is usually too easy to produce a nearly correct script, and too
difficult to produce an exactly right one, for all but serious sed or
perl regex hackers.

I'd be especially impressed if you can get it to also analyse the context in
which the semaphore is used and determine whether or not it should be a
counting semaphore, a mutex or a completion. You can probably do this sort of
thing with Perl regexes... they seem to be terrifically[*] powerful.

 [*] and I mean that in the proper sense:-)

David