Extract iso from resulting files of livecd-iso-to-pxeboot

[hai wu]

Does anyone know how to extract iso file from initrd.img file generated from
command 'livecd-creator'/'livecd-iso-to-pxeboot'? This livecd tools embed
the ISO file in initrd.img and hide it there, and there is not tool so far
to extract ISO file out of initrd.img file ..

[Léon Keijser]

On Wed, 2011-04-27 at 21:40 +0000, hai wu wrote:
>  Does anyone know how to extract iso file from initrd.img file
>  generated from command 'livecd-creator'/'livecd-iso-to-pxeboot'? This
>  livecd tools embed the ISO file in initrd.img and hide it there, and
>  there is not tool so far to extract ISO file out of initrd.img
>  file .. 
>   
Something like this?


$ file initrd-plymouth.img:
initrd-plymouth.img: gzip compressed data, from Unix, last modified: Mon
Apr 18 23:03:08 2011, max compression

$ gunzip initrd-plymouth.img -S .img

$ file initrd-plymouth
initrd-plymouth: ASCII cpio archive (SVR4 with no CRC)

$ mkdir /tmp/cpio-extracted
$ cd /tmp/cpio-extracted
$ cpio -idmb < /path/to/initrd-plymouth
$ ls


regards,

Léon

[Christian Horn]

On Thu, Apr 28, 2011 at 08:03:16AM +0200, Léon Keijser wrote:
>  
>  $ cpio -idmb < /path/to/initrd-plymouth 
Nice, as -imdb Is finally a combination of parameters to cpio that
could stick in my mind :)


Christian

[hai wu]

Hello,

This is not working, and would not work, as the ISO is embedded in
initrd.img file, and cpio command alone is not enough to retrieve the ISO ..
You could try it first ..

On Thu, Apr 28, 2011 at 1:03 AM, Léon Keijser <keijser(a)stone-it.com&gt; wrote:

>  On Wed, 2011-04-27 at 21:40 +0000, hai wu wrote:
>  > Does anyone know how to extract iso file from initrd.img file
>  > generated from command 'livecd-creator'/'livecd-iso-to-pxeboot'?
> This
>  > livecd tools embed the ISO file in initrd.img and hide it there, and
>  > there is not tool so far to extract ISO file out of initrd.img
>  > file ..
>  >
>
>  Something like this?
>
>
>  $ file initrd-plymouth.img:
>  initrd-plymouth.img: gzip compressed data, from Unix, last modified: Mon
>  Apr 18 23:03:08 2011, max compression
>
>  $ gunzip initrd-plymouth.img -S .img
>
>  $ file initrd-plymouth
>  initrd-plymouth: ASCII cpio archive (SVR4 with no CRC)
>
>  $ mkdir /tmp/cpio-extracted
>  $ cd /tmp/cpio-extracted
>  $ cpio -idmb < /path/to/initrd-plymouth
>  $ ls
>
>
>  regards,
>
>  Léon
>
>
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