I may have misunderstood the qn, but it seems like http://search.cpan.org/~mgrabnar/File-Tail-0.99.3/Tail.pm is sufficient, then just dump each N (eg 30) lines to a new o/p file

In reply to Re: Help with fork, read and write from a pipe by Anonymous Monk
in thread Help with fork, read and write from a pipe by h123

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