From owner-freebsd-fs@FreeBSD.ORG  Wed Sep 27 17:12:18 2006
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Date: Wed, 27 Sep 2006 13:11:54 -0400
From: Gary Palmer <gpalmer@freebsd.org>
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Subject: Re: Hi: Porting Cramfs on FreeBSD
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On Wed, Sep 27, 2006 at 03:07:16PM +0200, Oliver Fromme wrote:
> krishnamurthy holla wrote:
>  >  I want to port cramfs to freebsd-6.1 ; can anybody give me
>  > some tips about how to port..
> 
> I think porting cramfs is not a good idea.  It's GPL'ed,
> doesn't fully support POSIX semantics, and has severe
> limitations (16 MB maximum file size, 256 MB maximum file
> system size).
> 
> It is probably better to design a new file system from
> scratch (and make it BSD-licensed).

For running on a flash card, I'm not sure those limits are unreasonable.
Also, if you do a implementation from the public data in the headers, is
that code also under GPL?