Files
serenity/Meta/build-image-uefi.sh
Sönke Holz 5ed2aac2fc Meta: Add a script for building UEFI disk images
This script is mostly based on build-image-grub-uefi.sh.
Compared to that script, it doesn't use GRUB and works for all
architectures.

The generated disk image works with removable media.
2025-08-05 17:32:25 +02:00

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#!/usr/bin/env bash
set -e
script_path=$(cd -P -- "$(dirname -- "$0")" && pwd -P)
. "${script_path}/shell_include.sh"
if [ "$(id -u)" != 0 ]; then
set +e
${SUDO} -- "${SHELL}" -c "\"$0\" $* || exit 42"
case $? in
1)
die "this script needs to run as root"
;;
42)
exit 1
;;
*)
exit 0
;;
esac
else
: "${SUDO_UID:=0}" "${SUDO_GID:=0}"
fi
DISK_SIZE=$(($(disk_usage "$SERENITY_SOURCE_DIR/Base") + $(disk_usage Root) + 512 + 300))
printf "setting up disk image... "
dd if=/dev/zero of=uefi_disk_image bs=1M count="${DISK_SIZE}" status=none || die "couldn't create disk image"
chown "$SUDO_UID":"$SUDO_GID" uefi_disk_image || die "couldn't adjust permissions on disk image"
echo "done"
printf "creating loopback device... "
dev=$(losetup --find --partscan --show uefi_disk_image)
if [ -z "$dev" ]; then
die "couldn't mount loopback device"
fi
echo "loopback device is at ${dev}"
cleanup() {
if [ -d esp ]; then
printf "unmounting EFI system partition... "
umount esp || ( sleep 1 && sync && umount esp )
rmdir esp
echo "done"
fi
if [ -d mnt ]; then
printf "unmounting root filesystem... "
umount mnt || ( sleep 1 && sync && umount mnt )
rmdir mnt
echo "done"
fi
if [ -e "${dev}" ]; then
printf "cleaning up loopback device... "
losetup -d "${dev}"
echo "done"
fi
}
trap cleanup EXIT
printf "creating partition table... "
parted -s "${dev}" mklabel gpt mkpart EFI fat32 0% 512MB mkpart SerenityOS ext2 512MB 100% set 1 esp on || die "couldn't partition disk"
echo "done"
printf "creating new filesystems... "
mkfs.vfat -F 32 -n EFI "${dev}p1" >/dev/null || die "couldn't create EFI system partition filesystem"
mke2fs -q -L SerenityOS "${dev}p2" || die "couldn't create root filesystem"
echo "done"
printf "mounting filesystems... "
mkdir -p esp
mount "${dev}p1" esp || die "couldn't mount EFI system partition"
mkdir -p mnt
mount "${dev}p2" mnt || die "couldn't mount root filesystem"
echo "done"
"$script_path/build-root-filesystem.sh"
case $SERENITY_ARCH in
aarch64)
BOOT_FILE_NAME=BOOTAA64.EFI
;;
riscv64)
BOOT_FILE_NAME=BOOTRISCV64.EFI
;;
x86_64)
BOOT_FILE_NAME=BOOTX64.EFI
;;
*)
die "unknown architecture: $SERENITY_ARCH"
;;
esac
root_uuid=$(blkid -o export "${dev}p2" | grep ^PARTUUID | cut -d= -f2)
cat <<EOF >esp/cmdline.txt
root=PARTUUID:${root_uuid}
EOF
mkdir -p esp/EFI/BOOT
cp mnt/boot/Kernel.efi esp/EFI/BOOT/$BOOT_FILE_NAME