#!/bin/bash
#======================================================================================
# Function: Update the QEMU AARCH64 KVM vitual machine openwrt firmware
# Copyright (C) 2022-- https://github.com/unifreq/openwrt_packit
# Copyright (C) 2022-- https://github.com/ophub
#======================================================================================
#
# The script supports directly setting parameters for update, skipping interactive selection
# openwrt-update-amlogic ${OPENWRT_FILE} ${AUTO_MAINLINE_UBOOT} ${RESTORE_CONFIG} ${WORK_DIR}
# E.g: openwrt-update-kvm openwrt_qemu-aarch64.img.gz no restore /mnt/vda4
# E.g: openwrt-update-kvm openwrt_qemu-aarch64.img.gz no no-restore /mnt/data

# You can also execute the script directly, and interactively select related functions
# E.g: openwrt-update-kvm
#
#======================================================================================

# Encountered a serious error, abort the script execution
error_msg() {
    echo -e "[ERROR] ${1}"
    exit 1
}

# Get the partition name of the /boot file system
get_boot_partition_name() {
    local paths="/boot"
    local partition_name

    partition_name=$(df "${paths}" | awk 'NR==2 {print $1}' | awk -F '/' '{print $3}')

    echo "${partition_name}"
}

# Get the partition name of the root file system
get_root_partition_name() {
    local paths=("/" "/overlay" "/rom")
    local partition_name

    for path in "${paths[@]}"; do
        partition_name=$(df "${path}" | awk 'NR==2 {print $1}' | awk -F '/' '{print $3}')
        [[ -n "${partition_name}" ]] && break
    done

    echo "${partition_name}"
}

# Get the partition message of the root file system
get_root_partition_msg() {
    local paths=("/" "/overlay" "/rom")
    local partition_name

    for path in "${paths[@]}"; do
        partition_msg=$(lsblk -l -o NAME,PATH,TYPE,UUID,MOUNTPOINT | awk '$3~/^part$/ && $5 ~ "^" "'"${path}"'" "$" {print $0}')
        [[ -n "${partition_msg}" ]] && break
    done

    [[ -z "${partition_msg}" ]] && error_msg "Cannot find the root partition message!"
    echo "${partition_msg}"
}

# Receive one-key command related parameters
IMG_NAME="${1}"
AUTO_MAINLINE_UBOOT="${2}"
BACKUP_RESTORE_CONFIG="${3}"
WORK_DIR="${4}"

# Check the necessary dependencies
DEPENDS="lsblk uuidgen grep awk btrfs mkfs.fat mkfs.btrfs md5sum fatlabel jq"
echo "Check the necessary dependencies..."
for dep in ${DEPENDS}; do
    WITCH=$(busybox which ${dep})
    if [ "${WITCH}" == "" ]; then
        error_msg "Dependent command: ${dep} does not exist, upgrade cannot be performed!"
    else
        echo "${dep} path: ${WITCH}"
    fi
done
echo "Check passed"

# Current device model
source /etc/flippy-openwrt-release
if [[ -z "${PLATFORM}" ]]; then
    error_msg "The platform is empty."
elif [[ "${PLATFORM}" != "qemu-aarch64" ]]; then
    error_msg "The platform is missing, only support qemu-aarch64."
else
    echo -e "Current platform: [ ${PLATFORM} ]"
    sleep 3
fi

# Check and repair partition mount points
[[ -z "$(get_boot_partition_name)" || -z "$(get_root_partition_name)" ]] && {
    echo -e "Partition mount point error, start repairing..."
    openwrt-backup -g
}

# Find the partition where root is located
# vda2 or vda3
ROOT_PTNAME="$(get_root_partition_name)"

# Find the disk where the partition is located, only supports sd?? hd?? vd??
case ${ROOT_PTNAME} in
[hsv]d[a-z][1-4])
    DISK_NAME=$(echo ${ROOT_PTNAME} | awk '{print substr($1, 1, length($1)-1)}')
    PART_PRESTR=""
    LABEL_PRESTR=""
    ;;
*)
    error_msg "Unable to recognize the disk type of ${ROOT_PTNAME}!"
    ;;
esac

function get_docker_root {
    local data_root
    if [[ -f /etc/config/dockerd ]]; then
        data_root=$(uci get dockerd.globals.data_root)
    fi
    if [[ -z "${data_root}" ]] && [[ -f /etc/docker/daemon.json ]]; then
        data_root=$(jq -r '."data-root"' /etc/docker/daemon.json)
    fi
    echo "$data_root"
}
DOCKER_ROOT=$(get_docker_root)

if [[ -z "${WORK_DIR}" ]]; then
    WORK_DIR="/mnt/${DISK_NAME}${PART_PRESTR}4/"
fi
if [[ ! -d "${WORK_DIR}" ]]; then
    error_msg "the work directory is not exists. [ ${WORK_DIR} ]"
fi

cd "${WORK_DIR}"
if [[ -d "/tmp/upload" ]] && [[ -f "/tmp/upload/*img*" ]]; then
    mv -f /tmp/upload/*img* .
    if [[ $? -ne 0 ]]; then
        error_msg "move file failed."
    fi
fi
sync

if [[ "${IMG_NAME}" == *.img ]]; then
    echo -e "Update using [ ${IMG_NAME} ] file. Please wait a moment ..."
elif [ $(ls *.img -l 2>/dev/null | grep "^-" | wc -l) -ge 1 ]; then
    IMG_NAME=$(ls *.img | head -n 1)
    echo -e "Update using [ ${IMG_NAME} ] ] file. Please wait a moment ..."
elif [ $(ls *.img.xz -l 2>/dev/null | grep "^-" | wc -l) -ge 1 ]; then
    xz_file=$(ls *.img.xz | head -n 1)
    echo -e "Update using [ ${xz_file} ] file. Please wait a moment ..."
    xz -d ${xz_file} 2>/dev/null
    IMG_NAME=$(ls *.img | head -n 1)
elif [ $(ls *.img.gz -l 2>/dev/null | grep "^-" | wc -l) -ge 1 ]; then
    gz_file=$(ls *.img.gz | head -n 1)
    echo -e "Update using [ ${gz_file} ] file. Please wait a moment ..."
    gzip -df ${gz_file} 2>/dev/null
    IMG_NAME=$(ls *.img | head -n 1)
elif [ $(ls *.7z -l 2>/dev/null | grep "^-" | wc -l) -ge 1 ]; then
    gz_file=$(ls *.7z | head -n 1)
    echo -e "Update using [ ${gz_file} ] file. Please wait a moment ..."
    bsdtar -xmf ${gz_file} 2>/dev/null
    [ $? -eq 0 ] || 7z x ${gz_file} -aoa -y 2>/dev/null
    IMG_NAME=$(ls *.img | head -n 1)
elif [ $(ls *.zip -l 2>/dev/null | grep "^-" | wc -l) -ge 1 ]; then
    zip_file=$(ls *.zip | head -n 1)
    echo -e "Update using [ ${zip_file} ] file. Please wait a moment ..."
    unzip -o ${zip_file} 2>/dev/null
    IMG_NAME=$(ls *.img | head -n 1)
else
    echo -e "Please upload or specify the update openwrt firmware file."
    #echo -e "Upload method: system menu → Amlogic Service → Manually Upload Update"
    echo -e "Specify method: Place the openwrt firmware file in [ ${WORK_DIR} ]"
    echo -e "The supported file suffixes are: *.img, *.img.xz, *.img.gz, *.7z, *.zip"
    echo -e "After upload the openwrt firmware file, run again."
    exit 1
fi
sync

# check file
if [ ! -f "${IMG_NAME}" ]; then
    error_msg "No update file found."
else
    echo "Start update from [ ${IMG_NAME} ]"
fi

# find efi partition
EFI_PART_MSG=$(lsblk -l -o NAME,PATH,TYPE,UUID,MOUNTPOINT | awk '$3~/^part$/ && $5 ~ /^\/boot\/efi$/ {print $0}')
if [ "${EFI_PART_MSG}" == "" ]; then
    error_msg "The EFI partition does not exist, so the update cannot be continued!"
fi
EFI_NAME=$(echo $EFI_PART_MSG | awk '{print $1}')
EFI_DEV=$(echo $EFI_PART_MSG | awk '{print $2}')
EFI_UUID=$(echo $EFI_PART_MSG | awk '{print $4}')

BR_FLAG=1
if [[ ${BACKUP_RESTORE_CONFIG} == "restore" ]]; then
    BR_FLAG=1
elif [[ ${BACKUP_RESTORE_CONFIG} == "no-restore" ]]; then
    BR_FLAG=0
else
    echo -ne "Whether to backup and restore the current config files? y/n [y]\b\b"
    read yn
    case $yn in
    n* | N*) BR_FLAG=0 ;;
    esac
fi

# find root partition
ROOT_PART_MSG="$(get_root_partition_msg)"
ROOT_NAME=$(echo ${ROOT_PART_MSG} | awk '{print $1}')
ROOT_DEV=$(echo ${ROOT_PART_MSG} | awk '{print $2}')
ROOT_UUID=$(echo ${ROOT_PART_MSG} | awk '{print $4}')

case ${ROOT_NAME} in
${DISK_NAME}${PART_PRESTR}2)
    NEW_ROOT_NAME="${DISK_NAME}${PART_PRESTR}3"
    NEW_ROOT_LABEL="${LABEL_PRESTR}ROOTFS2"
    ;;
${DISK_NAME}${PART_PRESTR}3)
    NEW_ROOT_NAME="${DISK_NAME}${PART_PRESTR}2"
    NEW_ROOT_LABEL="${LABEL_PRESTR}ROOTFS1"
    ;;
*)
    error_msg "ROOTFS The partition location is incorrect, so the update cannot continue!"
    ;;
esac
echo "NEW_ROOT_NAME: [ ${NEW_ROOT_NAME} ]"

# find new root partition
NEW_ROOT_PART_MSG=$(lsblk -l -o NAME,PATH,TYPE,UUID,MOUNTPOINT | grep "${NEW_ROOT_NAME}" | awk '$3 ~ /^part$/ && $5 !~ /^\/$/ && $5 !~ /^\/boot$/ {print $0}')
if [ "${NEW_ROOT_PART_MSG}" == "" ]; then
    error_msg "The new ROOTFS partition does not exist, so the update cannot continue!"
fi
NEW_ROOT_NAME=$(echo $NEW_ROOT_PART_MSG | awk '{print $1}')
NEW_ROOT_DEV=$(echo $NEW_ROOT_PART_MSG | awk '{print $2}')
NEW_ROOT_UUID=$(echo $NEW_ROOT_PART_MSG | awk '{print $4}')
NEW_ROOT_MOUNTPOINT=$(echo $NEW_ROOT_PART_MSG | awk '{print $5}')
echo "NEW_ROOT_MOUNTPOINT: [ ${NEW_ROOT_MOUNTPOINT} ]"

# losetup
losetup -f -P $IMG_NAME
if [ $? -eq 0 ]; then
    LOOP_DEV=$(losetup | grep "$IMG_NAME" | awk '{print $1}')
    if [ "$LOOP_DEV" == "" ]; then
        error_msg "loop device not found!"
    fi
else
    error_msg "losetup [ $IMG_FILE ] failed!"
fi

# fix loopdev issue in kernel 5.19
function fix_loopdev() {
    local parentdev=${1##*/}
    if [ ! -d /sys/block/${parentdev} ]; then
        return
    fi
    subdevs=$(lsblk -l -o NAME | grep -E "^${parentdev}.+\$")
    for subdev in $subdevs; do
        if [ ! -d /sys/block/${parentdev}/${subdev} ]; then
            return
        elif [ -b /dev/${sub_dev} ]; then
            continue
        fi
        source /sys/block/${parentdev}/${subdev}/uevent
        mknod /dev/${subdev} b ${MAJOR} ${MINOR}
        unset MAJOR MINOR DEVNAME DEVTYPE DISKSEQ PARTN PARTNAME
    done
}
fix_loopdev ${LOOP_DEV}

WAIT=3
echo "The loopdev is [ $LOOP_DEV ], wait [ ${WAIT} ] seconds. "
while [ $WAIT -ge 1 ]; do
    sleep 1
    WAIT=$((WAIT - 1))
done

# umount loop devices (openwrt will auto mount some partition)
MOUNTED_DEVS=$(lsblk -l -o NAME,PATH,MOUNTPOINT | grep "$LOOP_DEV" | awk '$3 !~ /^$/ {print $2}')
for dev in $MOUNTED_DEVS; do
    while :; do
        echo "umount [ $dev ] ... "
        umount -f $dev
        sleep 1
        mnt=$(lsblk -l -o NAME,PATH,MOUNTPOINT | grep "$dev" | awk '$3 !~ /^$/ {print $2}')
        if [ "$mnt" == "" ]; then
            break
        else
            echo "Retry ..."
        fi
    done
done

# mount src part
P1=${WORK_DIR}/efi
P2=${WORK_DIR}/root
mkdir -p $P1 $P2

echo "Mount [ ${LOOP_DEV}p1 ] -> [ ${P1} ] ... "
mount -t vfat -o ro ${LOOP_DEV}p1 ${P1}
if [ $? -ne 0 ]; then
    echo "Mount p1 [ ${LOOP_DEV}p1 ] failed!"
    losetup -D
    exit 1
fi

echo "Mount [ ${LOOP_DEV}p2 ] -> [ ${P2} ] ... "
ZSTD_LEVEL="6"
mount -t btrfs -o ro,compress=zstd:${ZSTD_LEVEL} ${LOOP_DEV}p2 ${P2}
if [ $? -ne 0 ]; then
    echo "Mount p2 [ ${LOOP_DEV}p2 ] failed!"
    umount -f ${P1}
    losetup -D
    exit 1
fi

# Prepare the dockerman config file
if [ -f ${P2}/etc/init.d/dockerman ] && [ -f ${P2}/etc/config/dockerd ]; then

    flg=0
    # get current docker data root
    data_root=$(uci get dockerd.globals.data_root 2>/dev/null)
    if [ "$data_root" == "" ]; then
        flg=1
        # get current config from /etc/docker/daemon.json
        if [ -f "/etc/docker/daemon.json" ] && [ -x "/usr/bin/jq" ]; then
            data_root=$(jq -r '."data-root"' /etc/docker/daemon.json)

            bip=$(jq -r '."bip"' /etc/docker/daemon.json)
            [ "$bip" == "null" ] && bip="172.31.0.1/24"

            log_level=$(jq -r '."log-level"' /etc/docker/daemon.json)
            [ "$log_level" == "null" ] && log_level="warn"

            _iptables=$(jq -r '."iptables"' /etc/docker/daemon.json)
            [ "$_iptables" == "null" ] && _iptables="true"

            registry_mirrors=$(jq -r '."registry-mirrors"[]' /etc/docker/daemon.json 2>/dev/null)
        fi
    fi

    if [ "$data_root" == "" ]; then
        data_root="/opt/docker/" # the default data root
    fi

    if ! uci get dockerd.globals >/dev/null 2>&1; then
        uci set dockerd.globals='globals'
        uci commit
    fi

    # delete alter config , use inner config
    if uci get dockerd.globals.alt_config_file >/dev/null 2>&1; then
        uci delete dockerd.globals.alt_config_file
        uci commit
    fi

    if [ $flg -eq 1 ]; then
        uci set dockerd.globals.data_root=$data_root
        [ "$bip" != "" ] && uci set dockerd.globals.bip=$bip
        [ "$log_level" != "" ] && uci set dockerd.globals.log_level=$log_level
        [ "$_iptables" != "" ] && uci set dockerd.globals.iptables=$_iptables
        if [ "$registry_mirrors" != "" ]; then
            for reg in $registry_mirrors; do
                uci add_list dockerd.globals.registry_mirrors=$reg
            done
        fi
        uci set dockerd.globals.auto_start='1'
        uci commit
    fi
fi

#format NEW_ROOT
echo "umount [ ${NEW_ROOT_MOUNTPOINT} ]"
umount -f "${NEW_ROOT_MOUNTPOINT}"
if [ $? -ne 0 ]; then
    echo "Umount [ ${NEW_ROOT_MOUNTPOINT} ] failed, Please restart and try again!"
    umount -f ${P1}
    umount -f ${P2}
    losetup -D
    exit 1
fi

echo "Format [ ${NEW_ROOT_DEV} ]"
NEW_ROOT_UUID=$(uuidgen)
mkfs.btrfs -f -U ${NEW_ROOT_UUID} -L ${NEW_ROOT_LABEL} ${NEW_ROOT_DEV}
if [ $? -ne 0 ]; then
    echo "Format [ ${NEW_ROOT_DEV} ] failed!"
    umount -f ${P1}
    umount -f ${P2}
    losetup -D
    exit 1
fi

echo "Mount [ ${NEW_ROOT_DEV} ] -> [ ${NEW_ROOT_MOUNTPOINT} ]"
mount -t btrfs -o compress=zstd:${ZSTD_LEVEL} ${NEW_ROOT_DEV} ${NEW_ROOT_MOUNTPOINT}
if [ $? -ne 0 ]; then
    echo "Mount [ ${NEW_ROOT_DEV} ] -> [ ${NEW_ROOT_MOUNTPOINT} ] failed!"
    umount -f ${P1}
    umount -f ${P2}
    losetup -D
    exit 1
fi

# begin copy rootfs
cd ${NEW_ROOT_MOUNTPOINT}
echo "Start copying data， From [ ${P2} ] TO [ ${NEW_ROOT_MOUNTPOINT} ] ..."
ENTRYS=$(ls)
for entry in $ENTRYS; do
    if [ "$entry" == "lost+found" ]; then
        continue
    fi
    echo "Remove old [ $entry ] ... "
    rm -rf $entry
    if [ $? -ne 0 ]; then
        error_msg "failed."
    fi
done

echo "Create folder ... "
btrfs subvolume create etc
mkdir -p .snapshots .reserved bin boot dev lib opt mnt overlay proc rom root run sbin sys tmp usr www
ln -sf lib/ lib64
ln -sf tmp/ var
sync

COPY_SRC="boot root etc bin sbin lib opt usr www"
echo "Copy data begin ... "
for src in $COPY_SRC; do
    echo "Copy [ $src ] ... "
    (cd ${P2} && tar cf - $src) | tar xf -
    sync
done

# if not backup, then force rewrite the etc/docker/daemon.json
if [ "${BR_FLAG}" -eq 0 ]; then
    cat >./etc/docker/daemon.json <<EOF
{
  "bip": "172.31.0.1/24",
  "data-root": "${DOCKER_ROOT}",
  "log-level": "warn",
  "log-driver": "json-file",
  "log-opts": {
     "max-size": "10m",
     "max-file": "5"
   },
  "registry-mirrors": [
     "https://mirror.baidubce.com/",
     "https://hub-mirror.c.163.com"
   ]
}
EOF
fi

cat >./etc/fstab <<EOF
UUID=${NEW_ROOT_UUID} / btrfs compress=zstd:${ZSTD_LEVEL} 0 1
LABEL=EFI /boot/efi vfat defaults 0 2
#tmpfs /tmp tmpfs defaults,nosuid 0 0
EOF

cat >./etc/config/fstab <<EOF
config  global
        option anon_swap '0'
        option anon_mount '1'
        option auto_swap '0'
        option auto_mount '1'
        option delay_root '5'
        option check_fs '0'

config  mount
        option target '/rom'
        option uuid '${NEW_ROOT_UUID}'
        option enabled '1'
        option enabled_fsck '1'
        option fstype 'btrfs'
        option options 'compress=zstd:${ZSTD_LEVEL}'

config  mount
        option target '/boot/efi'
        option label 'EFI'
        option enabled '1'
        option enabled_fsck '1'
        option fstype 'vfat'

EOF
(
    cd etc/rc.d
    rm -f S??shortcut-fe
    if grep "sfe_flow '1'" ../config/turboacc >/dev/null; then
        if find ../../lib/modules -name 'shortcut-fe-cm.ko'; then
            ln -sf ../init.d/shortcut-fe S99shortcut-fe
        fi
    fi
)

# move /etc/config/balance_irq to /etc/balance_irq
[ -f "./etc/config/balance_irq" ] && mv ./etc/config/balance_irq ./etc/
sync

echo "Create initial etc snapshot -> .snapshots/etc-000"
btrfs subvolume snapshot -r etc .snapshots/etc-000
sync

[ -d /mnt/${DISK_NAME}${PART_PRESTR}4/docker ] || mkdir -p /mnt/${DISK_NAME}${PART_PRESTR}4/docker
rm -rf opt/docker && ln -sf /mnt/${DISK_NAME}${PART_PRESTR}4/docker/ opt/docker

if [ -f /mnt/${NEW_ROOT_NAME}/etc/config/AdGuardHome ]; then
    [ -d /mnt/${DISK_NAME}${PART_PRESTR}4/AdGuardHome/data ] || mkdir -p /mnt/${DISK_NAME}${PART_PRESTR}4/AdGuardHome/data
    if [ ! -L /usr/bin/AdGuardHome ]; then
        [ -d /usr/bin/AdGuardHome ] &&
            cp -a /usr/bin/AdGuardHome/* /mnt/${DISK_NAME}${PART_PRESTR}4/AdGuardHome/
    fi
    ln -sf /mnt/${DISK_NAME}${PART_PRESTR}4/AdGuardHome /mnt/${NEW_ROOT_NAME}/usr/bin/AdGuardHome
fi
sync
echo "Copy data complete ..."

BACKUP_LIST=$(${P2}/usr/sbin/openwrt-backup -p)
if [[ "${BR_FLAG}" -eq "1" && -n "${BACKUP_LIST}" ]]; then
    echo -n "Start restoring configuration files ... "
    (
        cd /
        eval tar czf ${NEW_ROOT_MOUNTPOINT}/.reserved/openwrt_config.tar.gz "${BACKUP_LIST}" 2>/dev/null
    )
    tar xzf ${NEW_ROOT_MOUNTPOINT}/.reserved/openwrt_config.tar.gz

    [ -f ./etc/config/dockerman ] && sed -e "s/option wan_mode 'false'/option wan_mode 'true'/" -i ./etc/config/dockerman 2>/dev/null
    [ -f ./etc/config/dockerd ] && sed -e "s/option wan_mode '0'/option wan_mode '1'/" -i ./etc/config/dockerd 2>/dev/null
    [ -f ./etc/config/verysync ] && sed -e 's/config setting/config verysync/' -i ./etc/config/verysync 2>/dev/null

    # Restore fstab
    cp -f .snapshots/etc-000/fstab ./etc/fstab
    cp -f .snapshots/etc-000/config/fstab ./etc/config/fstab
    # 还原 luci
    cp -f .snapshots/etc-000/config/luci ./etc/config/luci
    # 还原/etc/config/rpcd
    cp -f .snapshots/etc-000/config/rpcd ./etc/config/rpcd

    sync
    echo "Restore configuration information complete."
fi

echo "Modify the configuration file ... "
rm -f "./etc/rc.local.orig" "./etc/first_run.sh" "./etc/part_size"
rm -rf "./opt/docker" && ln -sf "/mnt/${DISK_NAME}${PART_PRESTR}4/docker" "./opt/docker"
rm -f ./etc/bench.log
cat >>./etc/crontabs/root <<EOF
37 5 * * * /etc/coremark.sh
EOF

sss=$(date +%s)
ddd=$((sss / 86400))
sed -e "s/:0:0:99999:7:::/:${ddd}:0:99999:7:::/" -i ./etc/shadow
# Fix the problem of repeatedly adding amule entries after each upgrade
sed -e "/amule:x:/d" -i ./etc/shadow
# Fix the problem of repeatedly adding sshd entries after each upgrade of dropbear
sed -e "/sshd:x:/d" -i ./etc/shadow
if ! grep "sshd:x:22:sshd" ./etc/group >/dev/null; then
    echo "sshd:x:22:sshd" >>./etc/group
fi
if ! grep "sshd:x:22:22:sshd:" ./etc/passwd >/dev/null; then
    echo "sshd:x:22:22:sshd:/var/run/sshd:/bin/false" >>./etc/passwd
fi
if ! grep "sshd:x:" ./etc/shadow >/dev/null; then
    echo "sshd:x:${ddd}:0:99999:7:::" >>./etc/shadow
fi

if [ "${BR_FLAG}" -eq "1" ]; then
    if [ -x ./bin/bash ] && [ -f ./etc/profile.d/30-sysinfo.sh ]; then
        sed -e 's/\/bin\/ash/\/bin\/bash/' -i ./etc/passwd
    fi
    sync
fi
sed -e "s/option hw_flow '1'/option hw_flow '0'/" -i ./etc/config/turboacc
(
    cd etc/rc.d
    rm -f S??shortcut-fe
    if grep "sfe_flow '1'" ../config/turboacc >/dev/null; then
        if find ../../lib/modules -name 'shortcut-fe-cm.ko'; then
            ln -sf ../init.d/shortcut-fe S99shortcut-fe
        fi
    fi
)
eval tar czf .reserved/openwrt_config.tar.gz "${BACKUP_LIST}" 2>/dev/null

rm -f ./etc/part_size ./etc/first_run.sh
if [ -x ./usr/sbin/balethirq.pl ]; then
    if grep "balethirq.pl" "./etc/rc.local"; then
        echo "balance irq is enabled"
    else
        echo "enable balance irq"
        sed -e "/exit/i\/usr/sbin/balethirq.pl" -i ./etc/rc.local
    fi
fi

mv ./etc/rc.local ./etc/rc.local.orig
cat >"./etc/rc.local" <<EOF
if ! ls /etc/rc.d/S??dockerd >/dev/null 2>&1;then
    /etc/init.d/dockerd enable
    /etc/init.d/dockerd start
fi
if ! ls /etc/rc.d/S??dockerman >/dev/null 2>&1 && [ -f /etc/init.d/dockerman ];then
    /etc/init.d/dockerman enable
    /etc/init.d/dockerman start
fi
mv /etc/rc.local.orig /etc/rc.local
chmod 755 /etc/rc.local
exec /etc/rc.local
exit
EOF
chmod 755 ./etc/rc.local*

# move /etc/config/balance_irq to /etc/balance_irq
[ -f "./etc/config/balance_irq" ] && mv ./etc/config/balance_irq ./etc/

echo "Create etc snapshot -> .snapshots/etc-001"
btrfs subvolume snapshot -r etc .snapshots/etc-001

cd ${WORK_DIR}

echo "Copy efi files ..."
fatlabel ${EFI_DEV} "EFI"
cd /boot/efi
mv ./EFI/BOOT/grub.cfg /tmp/grub.cfg.prev
rm -rf *
cp -a ${P1}/* .
# 如果想启动上一个版本的openwrt,可以把 /boot/efi/EFI/BOOT/grub.cfg.prev 复制成 /boot/efi/EFI/BOOT/grub.cfg
mv /tmp/grub.cfg.prev ./EFI/BOOT/

echo "Modify efi configuration ... "
cd /boot/efi/EFI/BOOT
cat >grub.cfg <<EOF
echo "search fs_uuid ${NEW_ROOT_UUID} ..."
search.fs_uuid ${NEW_ROOT_UUID} root
echo "root=\$root"
echo "set prefix ... "
set prefix=(\$root)'/boot/grub2'
echo "prefix=\$prefix"
source \${prefix}/grub.cfg
EOF

echo "Modify boot configuration ... "
cd ${NEW_ROOT_MOUNTPOINT}/boot/grub2
cat >grub.cfg <<EOF
insmod gzio
insmod part_gpt
insmod zstd
insmod btrfs
terminal_input console
terminal_output console

set default="0"
set timeout=3

menuentry "OpenWrt" {
        echo    'Loading linux kernel ...'
        linux /boot/vmlinuz root=UUID=${NEW_ROOT_UUID} rootfstype=btrfs rootflags=compress=zstd:${ZSTD_LEVEL} console=ttyAMA0,115200n8 no_console_suspend consoleblank=0 fsck.fix=yes fsck.repair=yes net.ifnames=0 cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory swapaccount=1
        echo    'Loading initial ramdisk ...'
        initrd /boot/initrd.img
}
EOF

sync

cd $WORK_DIR
umount -f ${P1} ${P2} 2>/dev/null
losetup -D 2>/dev/null
rm -rf ${P1} ${P2} 2>/dev/null
rm -f ${IMG_NAME} 2>/dev/null
rm -f sha256sums 2>/dev/null
sync
wait

echo "Successfully updated, automatic restarting..."
sleep 3
reboot
exit 0