We have some sourceless software, and we're trying to determine the
parameters it sends to a particular OS/400 service program procedure API.

We tried creating a little preemptive C service program with one exportable
procedure of the same name to put high in the library list, and have it
call the real OS/400 service program procedure API.  That way we could
inspect the parameter values at run time.

However the binder gives error "Definition supplied multiple times" when we
create the service program.  The same procedure name is both the "callee"
and "caller".   Does someone know a way to intercept and inspect the
parameter values to OS/400 service program procedure API?

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