Date: Sun, 01 Feb 2009 18:46:26 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: Polytropon <freebsd@edvax.de> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Tool to uncat file Message-ID: <4985EE02.5030001@infracaninophile.co.uk> In-Reply-To: <20090201140102.e9a9a41a.freebsd@edvax.de> References: <20090201140102.e9a9a41a.freebsd@edvax.de>
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Polytropon wrote:
> Dear list,
>=20
> before starting to code on my own, I'd like to ask if there's already a=
> tool to uncat files, defining the file separation position as a string
> of bytes, usually given in hexadecimal form.
>=20
> An example could be this:
>=20
> % uncat -p 0x12,0x52,0xf1,0x09 file_orig
>=20
> It creates file_1 file_2 file_3. And, of course,
>=20
> % cat file_1 file_2 file_3 > file_orig
>=20
> would re-create the original file. The bytes 0x12,0x52,0xf1,0x09 tell t=
he
> file starting pattern (-p), where a new file begins.
>=20
> I cannot use dd due to the fact that the files concatenated are of a
> different size. So the idea would be to look for specific byte pattern
> and then start a new file each time it occurs on input.
>=20
> Is there such a tool, or any other ideas?
csplit(1)
Cheers,
Matthew
--=20
Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
Kent, CT11 9PW
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