Re: [gentoo-catalyst] How is initrd built?

["Paul Smith" <psmith@nortel.com>]

%% Eric Edgar <rocket@gentoo.org> writes:

  ee> You technically cannot extract the cpio archive as far as I can tell
  ee> because it really is multiple cpio archives concatenated together.

Ah!  OK.

  ee> cd ${INITRAMFS_OVERLAY}
  ee> find . -print | cpio --quiet -o -H newc | gzip -9 > ${CACHE_DIR}/cpio/initramfs-overlay.cpio.gz
  ee> cat old-oldinitramfs.cpio.gz initramfs-overlay.cpio.gz 	> new-initramfs.cpio.gz	

Wait, that's not right is it?

Is the initramfs really a concatenation of compressed cpio files?  I
don't think it is... gzip can't handle that.

It must be a compression of a concatenation of cpio files, right?  In
that case the above command line is not correct... I'd need to create
the cpio file, concatenate it to an uncompressed copy of the existing
initramfs, then compress the whole thing again.

Yes?

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 Paul D. Smith <psmith@nortel.com>           HASMAT--HA Software Mthds & Tools
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