linux-kernel - Re: [PATCH] init: bzip2 or lzma -compressed kernels and initrds

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Message-ID: <48C4E3B4.80506@zytor.com>
Date:	Mon, 08 Sep 2008 01:35:00 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Rob Landley <rob@...dley.net>
CC:	Alain Knaff <alain@...ff.lu>,
	Leon Woestenberg <leon.woestenberg@...il.com>,
	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] init: bzip2 or lzma -compressed kernels and initrds

Rob Landley wrote:
> 
> Actually, from what I've seen the main reason lzma doesn't get used for 
> tarballs a lot is that whoever originally created it didn't include a 
> fingerprint.  You can go "file tar.gz" or "file tar.bz2" and it can figure 
> out by looking at the contents of the file what it _is_, but last I checked 
> there's no obvious way to tell an lzma file from the output of /dev/urandom.  
> This causes all sorts of small but annoying problems, and discourages its use 
> a bit...
> 

Both 7zip and LZMA-Utils have serious file format problems.  The author 
of LZMA-Utils is working on a new format, which is likely to be widely 
adopted once it materializes.

	-hpa
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