On 28/11/2023 at 04:44, Andrei Borzenkov wrote:
On 27.11.2023 23:06, Pascal Hambourg wrote:
But if I build an EFI GRUB core image with
grub-mkimage --prefix='(hd0,gpt4)' --format=x86_64-efi \
--output=/boot/efi/EFI/azerty/core.efi part_gpt ext2
(no / at the end of prefix), then when booting it, the $prefix value
seems to be the combination of the --prefix device and the $cmdpath path:
cmdpath=(hd0,gpt1)/EFI/azerty
prefix=(hd0,gpt4)/EFI/azerty
Is this expected behaviour ?
Yes. $prefix consists of two parts - device and the directory path. If
one of them is missing during initialization, grub attempts to guess and
fill it in.
Guessing a missing or incomplete device makes sense, but what is the use
case for guessing a missing path when the device is present ? AFAICS if
the devices in $cmdpath and --prefix do not match, the resulting $prefix
is doomed to failure.
