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From: "E. Robert Tisdale" <edwin@netwood.net>
Subject: Re: UNIX Compressed Files From A PC
Date: 2000/08/13
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"Marin D. Condic" wrote:

> > > I really have to do Open/Read/Write/Seek/Close -
>       ^^^^^^
>       |||||| And I'm NOT kidding!

I don't think you can do this
because, well, compressed files are compressed.
Generally, you can't simply modify the compressed file.
You must uncompress it, make the modification, then recompress it.
You can get an entirely different bit pattern in your compressed file
even if you are making very small changes.