[gentoo-catalyst] Initrd overlay for gentoo.igz

[Eliot Gable]

I am new to the whole "live cd" thing, so please bear with me here.

I am trying to add a file to the /etc/init.d/ directory that exists *after*
the entire Gentoo live cd boots up. I have figured out that the /etc/init.d
directory in the ISO image on the CD is a base environment of some sorts,
and that the gentoo.igz file in the isolinux directory on the CD contains
the real set of files that exist in the /etc/init.d directory once the
entire CD finishes booting. I have created a folder to hold my overlay
files. This folder looks like so:

find . -print

./etc
./etc/init.d
./etc/init.d/somescript

Now, I try to create an overlay like so:

find . -print | cpio --quiet -o -H newc | gzip -9 > ../gentoo.igz.new
cd ..
cat gentoo.igz.old gentoo.igz.new > gentoo.igz
cp gentoo.igz newcd/isolinux/
cd newcd
mkisofs -o ../gentoo.iso -b isolinux/isolinux.bin -c isolinux/boot.cat
-no-emul-boot -boot-load-size 4 -iso-level 2 -boot-info-table .
cdrecord -blank=fast dev=/dev/hdc ../gentoo.iso

The thing is, the resultant CD will boot just fine. However, the file does
not show up in the /etc/init.d/ directory after the CD finishes booting. I'm
trying to do this without having to build an entirely new live cd using the
catalyst utilities. All I want to do is add a single file (maybe two) to the
/etc/init.d directory, and maybe modify one of the existing files.

Any help on this would be greatly appreciated.

-Eliot Gable