Re: How searching for EFI-directory with custom-bootloader grubx64.efi?

[Pascal Hambourg]

Please reply to the list and do not top-post.

Le 03/05/2020 à 13:51, address@hidden a écrit :
> As i researched, it could work as:
>
> # EFI/Linux/grubx64.efi & grub.cfg - > the custom bootimage & grub.cfg to
> /boot/grub/grub.cfg
> # configfile ${cmdpath}/grub.cfg

GRUB can also search for a device which contains a specific file 
(assuming the filesystem driver is embedded or loaded) with

search --file --set <var> <pathname>

> I also could add the custom-path:
>
> # EFI/boot/bootx64.efi & grub.cfg

"Custom-path" ? EFI/boot/bootx64.efi is the removabe device path.
How does this help finding the proper device name ?

>    The Debian secure-boot setting works every time - at least for me. Do you
> think the big distros as Debian, etc. do it the same way?

IICR, Debian signed GRUB image is hardwired to search grub.cfg in 
/EFI/debian and won't work if installed in another path (e.g. with 
grub-install --bootloader-id <name>).


> Am 03.05.2020 10:18 schrieb Pascal Hambourg <address@hidden>:
>
>      Le 03/05/2020 à 09:38, Dernsen a écrit :
>       >
>       > The grubx64.efi is signed, so you can not edit it after signing and so
>       > it is a custom bootimage, this should work for installing on any
>       > amd64-efi system. So I set within grubx64.efi:
>       >
>       > set root='hd0,gpt1'
>       >
>       > set prefix=($root)'/EFI/linux'
>       >
>       > configfile $prefix/grub.cfg
>       >
>       > Usually EFI-directory is 'hd0,gpt1',
>
>      No it's not. The EFI partition may have any number, and the boot disk
>      many not be hd0.
>
>       > How could grub search specificly for the EFI-directory , which has to be
>       > on every EFI-system?
>
>      What about $cmdpath ?