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Date: Thu, 02 Aug 2007 13:42:53 -0500
From: Reid Linnemann <lreid@cs.okstate.edu>
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Cc: freebsd-questions@freebsd.org
Subject: Re: cpio -dump ...
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Written by Matthias Apitz on 08/02/07 12:58>>
> El día Wednesday, August 01, 2007 a las 03:21:12PM -0600, Ross Penner escribió:
> 
>> On 8/1/07, Reid Linnemann < lreid@cs.okstate.edu> wrote:
>>> Written by Ross Penner on 08/01/07 13:34>>
>>>> Hi everybody,
>>>>
>>>> I'm trying to install a system on a machine that doesn't have an optical
>>>> drive. I plan on using a USB flash drive to do the job and found a
>>>> messages from hackers@freebsd.org
>>>> (http://www.mail-archive.com/freebsd-hackers@freebsd.org/msg55434.html )
> 	...
> 
> Hello,
> 
> The above mentioned web page and script shows a usage of cpio(1)
> which I have never seen before:
> 
> 	cpio -dump ${tmpdir}/img
> 
> I was curious, looked into the man page of cpio(1) and even in the
> online manual at http://www.gnu.org/software/cpio/manual/cpio.html
> but did not saw anything about the option '-dump'; can someone
> bring a light to me? Thx
> 
> 	matthias

I think that should be read as a mnemonic combination of the -d -u -m 
and -p options (from 'info cpio'):

`-d, --make-directories'
      Create leading directories where needed.

`-u, --unconditional'
      Replace all files, without asking whether to replace existing
      newer files with older files.

`-m, --preserve-modification-time'
      Retain previous file modification times when creating files.

`-p, --pass-through'
      Run in copy-pass mode.  *Note Copy-pass mode::.

This seems to make sense to me.