I don't have experience with that personally, but I'd start with a good look at the RCS module on CPAN. There are also the modules RCS::Parser and RCS::Agent that appear to possibly be helpful. Agent in particular.

Related PM Nodes found in a quick search:
RCS & mod_perl
Perl code, RCS/CVS, and distribution

In reply to Re: Integrating RCS with Perl CGI by dynamo
in thread Integrating RCS with Perl CGI by cpatrick

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