CPIO archives

Nathan Aubrey nathan at paysonlinux.org
Thu Jul 5 12:04:17 MST 2007


On Thursday 05 July 2007 12:01:17 pm Lynn David Newton wrote:
>   n> <dunce cap on>
>
>   n> I have a cpio archive that I am trying to extract. I would like to
> dump the n> entire archive, change some files then re-create the archive.
> But everytime I n> try to extract the archive it over-writes files in my /
> directory tree... n> very bad!
>
>   n> cpio -i < archive.cpio
>
>   n> How do I extract it and force it to a specific tree?
>
> If it's doing that it probably means the archive was
> created using an absolute pathname, i.e., with "/" at
> the beginning.
>
>   cpio -itv < archive.cpio
>
> will show you the paths. If they start with "/" you may
> be out of luck unless you can find a way to do it in a
> chroot environment. I'm unwilling to experiment with
> that myself right now, but maybe someone else has a
> better idea.
>

Absolute path. /

> Man, I had to blow the dust off my cpio man page on
> that one. I used to run it a hundred times a day, but
> for years I've run it only in passthrough mode (-p) to
> copy directories, not to create archives, since these
> days tar seems to be the preferred command for creating
> single file archives.

This is a cpio boot image from a boot cd that I want to modify.
I hate cpio, but I just want to modify a boot image from a cd I have, rather 
than create a new boot cd from scratch. Just too much work that I don't have 
hours and hours to spend on right now...

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