From: Robert Dober <robert.dober@...>
Date: 2007-04-24T20:44:45+09:00
Subject: Re: unix zcat with ruby?

On 4/24/07, Brian Candler <B.Candler@pobox.com> wrote:
> On Tue, Apr 24, 2007 at 07:52:41PM +0900, Robert Dober wrote:
> > >of course but this behavior surprises me a little bit,
> > forget what I said, I just switched my brain on
> > the concatenation of two gzipped streams is of course not a gzipped stream,
>
> But the standalone gzip program handles this:
zcat does too, which is nice of course.
But this is an extra feature and I did not want to criticize zlib for
not implementing this extra feature, maybe someone will provide a
patch to ruby-core ;)
>
> $ (echo "foo" | gzip -c; echo "bar" | gzip -c) | gzip -dc
> foo
> bar
> $

>
> It enables you to grow a gzip file without having to entirely decompress and
> recompress what's already there.
Yeah I just tested this, as I use gzip only with tar.
Hmm does that mean that I was wrong that the concatenation of two
gzipped streams is not a gzipped stream?
Nahh, that surely is just an underlying feature of gzip (and bzip2 for
that matter).
Gotta look that after...
>
>
Cheers
Robert

-- 
You see things; and you say Why?
But I dream things that never were; and I say Why not?
-- George Bernard Shaw