Re: Pvgrub with lz4 compressed kernels

[Andy Smith <andy@xxxxxxxxxxxxxx>]

On Thu, May 07, 2020 at 10:51:54PM +0000, Andy Smith wrote:
> Do you know a way to detect only LZ4 kernel images? That way this
> technique could be used for only LZ4, as every other compression
> method works fine at the moment.

You can of course just use the pattern from extract-vmlinux to check
an image file:

lz4match=$(printf '\002!L\030')
grep -aq "$lz4match" /boot/vmlinuz-5.4.0-29-generic && echo "At least one LZ4 
header
found"

Cheers,
Andy