Bug#925309: Wrong prefix directory hardcoded in signed GRUB image

[Pascal Hambourg]

Control: reassign -1 grub-efi-amd64-bin
Control: tags -1 patch

On 13/12/2022 at 16:00, Pascal Hambourg wrote:
> On 24/03/2019 at 01:10, Colin Watson wrote:
>>
>> Possibly.  The prefix parameter given to grub-mkimage's -p option has to
>> be an actual path, not a variable reference.  In order to make it use
>> $cmdpath, we'd need another one of the arrangements we use for some of
>> the other pre-built images to use a config file embedded in a memdisk.

> An initial config file (memdisk)/grub.cfg is now embedded in the signed 
> core image along with the font file.

> 1) If /EFI/debian/grub.cfg exists, it is still used even if 
> /EFI/<id>/grub.cfg also exists. This is an issue when installing 
> multiple instances of GRUB for different Debian systems if one has the 
> default <id>="debian". Is it conceivable to reverse the order and use 
> $cmdpath/grub.cfg first ?

Patch attached.
The config file embedded in the normal disk boot image was obviously 
designed for the CD boot image. This patch uses a separate config file 
which searches in $cmdpath then $prefix.

> 2) The file /EFI/<id>/BOOT${ARCH}.CSV always contains the name "debian" 
> regardless of the identifier <id> specified by --bootloader-id on the 
> grub-install command line or $GRUB_DISTRIBUTOR in /etc/default/grub.

I will look into this next.
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