+
+ if [ -n "$VMEFI" ]; then
+
+ mkdir -p "${MNTPOINT}"/boot/efi
+ mount -t vfat "${EFI_TARGET}" "${MNTPOINT}"/boot/efi
+
+ if ! chroot "${MNTPOINT}" dpkg --list shim-signed 2>/dev/null | grep -q '^ii' ; then
+ echo "Notice: shim-signed package not present yet, installing it therefore."
+ # shellcheck disable=SC2086
+ DEBIAN_FRONTEND=$DEBIAN_FRONTEND chroot "$MNTPOINT" apt-get -y --no-install-recommends install $DPKG_OPTIONS shim-signed
+ fi
+
+ if [ "$(dpkg --print-architecture)" = "arm64" ]; then
+ if ! chroot "${MNTPOINT}" dpkg --list grub-efi-arm64-signed 2>/dev/null | grep -q '^ii' ; then
+ echo "Notice: grub-efi-arm64-signed package not present yet, installing it therefore."
+ # shellcheck disable=SC2086
+ DEBIAN_FRONTEND=$DEBIAN_FRONTEND chroot "$MNTPOINT" apt-get -y --no-install-recommends install $DPKG_OPTIONS grub-efi-arm64-bin grub-efi-arm64-signed
+ fi
+ chroot "$MNTPOINT" grub-install --target=arm64-efi --efi-directory=/boot/efi --uefi-secure-boot --removable "/dev/$LOOP_DISK"
+ elif [ "$(dpkg --print-architecture)" = "i386" ]; then
+ if ! chroot "${MNTPOINT}" dpkg --list grub-efi-ia32-signed 2>/dev/null | grep -q '^ii' ; then
+ echo "Notice: grub-efi-ia32-signed package not present yet, installing it therefore."
+ # shellcheck disable=SC2086
+ DEBIAN_FRONTEND=$DEBIAN_FRONTEND chroot "$MNTPOINT" apt-get -y --no-install-recommends install $DPKG_OPTIONS grub-efi-ia32-bin grub-efi-ia32-signed
+ fi
+ chroot "$MNTPOINT" grub-install --target=i386-efi --efi-directory=/boot/efi --uefi-secure-boot --removable "/dev/$LOOP_DISK"
+ else
+ if ! chroot "${MNTPOINT}" dpkg --list grub-efi-amd64-signed 2>/dev/null | grep -q '^ii' ; then
+ echo "Notice: grub-efi-amd64-signed package not present yet, installing it therefore."
+ # shellcheck disable=SC2086
+ DEBIAN_FRONTEND=$DEBIAN_FRONTEND chroot "$MNTPOINT" apt-get -y --no-install-recommends install $DPKG_OPTIONS grub-efi-amd64-bin grub-efi-amd64-signed
+ fi
+ chroot "$MNTPOINT" grub-install --target=x86_64-efi --efi-directory=/boot/efi --uefi-secure-boot --removable "/dev/$LOOP_DISK"
+ fi
+ else
+ dd if="${MNTPOINT}/usr/lib/grub/i386-pc/boot.img" of="${ORIG_TARGET}" conv=notrunc bs=440 count=1
+ case "${_opt_filesystem}" in
+ f2fs)
+ chroot "${MNTPOINT}" grub-mkimage -O i386-pc -p "(hd0,msdos1)/boot/grub" -o /tmp/core.img biosdisk part_msdos f2fs
+ ;;
+ xfs)
+ chroot "${MNTPOINT}" grub-mkimage -O i386-pc -p "(hd0,msdos1)/boot/grub" -o /tmp/core.img biosdisk part_msdos xfs
+ ;;
+ # NOTE - we might need to distinguish between further filesystems
+ *)
+ chroot "${MNTPOINT}" grub-mkimage -O i386-pc -p "(hd0,msdos1)/boot/grub" -o /tmp/core.img biosdisk part_msdos ext2
+ ;;
+ esac
+
+ dd if="${MNTPOINT}/tmp/core.img" of="${ORIG_TARGET}" conv=notrunc seek=1
+ rm -f "${MNTPOINT}/tmp/core.img"
+ fi