#!/bin/bash
#======================================================================================
# Function: Update openwrt to emmc for Allwinner STB
# Copyright (C) 2020-- https://github.com/unifreq/openwrt_packit
# Copyright (C) 2021-- https://github.com/ophub/luci-app-amlogic
#======================================================================================
#
# The script supports directly setting parameters for update, skipping interactive selection
# openwrt-update-allwinner ${OPENWRT_FILE} ${AUTO_MAINLINE_UBOOT} ${RESTORE_CONFIG}
# E.g: openwrt-update-allwinner openwrt_s905d.img.gz yes restore
# E.g: openwrt-update-allwinner openwrt_s905d.img.gz no no-restore

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

# 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}

# Current FDT file
if [[ -f "/boot/uEnv.txt" ]]; then
    source /boot/uEnv.txt 2>/dev/null
    MYDTB_FDTFILE=$(basename $FDT)
elif [[ -f "/boot/armbianEnv.txt" ]]; then
    source /boot/armbianEnv.txt 2>/dev/null
    MYDTB_FDTFILE="$(basename $fdtfile)"
elif [[ -f "/etc/flippy-openwrt-release" ]]; then
    source /etc/flippy-openwrt-release 2>/dev/null
    MYDTB_FDTFILE="${FDTFILE}"
fi

[[ -z "${MYDTB_FDTFILE}" ]] && error_msg "Invalid FDTFILE: [ ${MYDTB_FDTFILE} ]"

# Current device model
MYDEVICE_NAME=$(cat /proc/device-tree/model | tr -d '\000')
if [[ -z "${MYDEVICE_NAME}" ]]; then
    error_msg "The device name is empty and cannot be recognized."
elif [[ "$(echo ${MYDEVICE_NAME} | grep "V-Plus Cloud")" == "" ]]; then
    error_msg "[ ${MYDEVICE_NAME} ] is not [ V-Plus Cloud ] device, please select the correct script."
else
    echo -e "Current device: ${MYDEVICE_NAME} [ vplus ]"
    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
ROOT_PTNAME="$(get_root_partition_name)"

# Find the disk where the partition is located, only supports mmcblk?p? sd?? hd?? vd?? and other formats
case ${ROOT_PTNAME} in
mmcblk?p[1-4])
    EMMC_NAME=$(echo ${ROOT_PTNAME} | awk '{print substr($1, 1, length($1)-2)}')
    PARTITION_NAME="p"
    LB_PRE="EMMC_"
    ;;
[hsv]d[a-z][1-4])
    EMMC_NAME=$(echo ${ROOT_PTNAME} | awk '{print substr($1, 1, length($1)-1)}')
    PARTITION_NAME=""
    LB_PRE=""
    ;;
*)
    error_msg "Unable to recognize the disk type of ${ROOT_PTNAME}!"
    ;;
esac

cd /mnt/${EMMC_NAME}${PARTITION_NAME}4/
mv -f /tmp/upload/* . 2>/dev/null && 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 [ /mnt/${EMMC_NAME}${PARTITION_NAME}4/ ]"
    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 boot partition
BOOT_PART_MSG=$(lsblk -l -o NAME,PATH,TYPE,UUID,MOUNTPOINT | awk '$3~/^part$/ && $5 ~ /^\/boot$/ {print $0}')
if [ "${BOOT_PART_MSG}" == "" ]; then
    error_msg "The boot partition is not exists or not mounted, so it cannot be upgraded with this script!"
fi

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

BOOT_NAME=$(echo ${BOOT_PART_MSG} | awk '{print $1}')
BOOT_PATH=$(echo ${BOOT_PART_MSG} | awk '{print $2}')
BOOT_UUID=$(echo ${BOOT_PART_MSG} | awk '{print $4}')

# find root partition
ROOT_PART_MSG="$(get_root_partition_msg)"
ROOT_NAME=$(echo ${ROOT_PART_MSG} | awk '{print $1}')
ROOT_PATH=$(echo ${ROOT_PART_MSG} | awk '{print $2}')
ROOT_UUID=$(echo ${ROOT_PART_MSG} | awk '{print $4}')
case ${ROOT_NAME} in
${EMMC_NAME}${PARTITION_NAME}2)
    NEW_ROOT_NAME="${EMMC_NAME}${PARTITION_NAME}3"
    NEW_ROOT_LABEL="${LB_PRE}ROOTFS2"
    ;;
${EMMC_NAME}${PARTITION_NAME}3)
    NEW_ROOT_NAME="${EMMC_NAME}${PARTITION_NAME}2"
    NEW_ROOT_LABEL="${LB_PRE}ROOTFS1"
    ;;
*)
    error_msg "The root partition location is invalid, so it cannot be upgraded with this script!"
    ;;
esac

# 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 root partition is not exists, so it cannot be upgraded with this script!"
fi
NEW_ROOT_NAME=$(echo $NEW_ROOT_PART_MSG | awk '{print $1}')
NEW_ROOT_PATH=$(echo $NEW_ROOT_PART_MSG | awk '{print $2}')
NEW_ROOT_UUID=$(echo $NEW_ROOT_PART_MSG | awk '{print $4}')
NEW_ROOT_MP=$(echo $NEW_ROOT_PART_MSG | awk '{print $5}')

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

# 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 -n "umount $dev ... "
        umount -f $dev
        sleep 1
        mnt=$(lsblk -l -o NAME,PATH,MOUNTPOINT | grep "$dev" | awk '$3 !~ /^$/ {print $2}')
        if [ "$mnt" == "" ]; then
            echo "ok"
            break
        else
            echo "try again ..."
        fi
    done
done

# mount src part
WORK_DIR=$PWD
P1=${WORK_DIR}/boot
P2=${WORK_DIR}/root
mkdir -p $P1 $P2
echo -n "mount ${LOOP_DEV}p1 -> ${P1} ... "
mount -t vfat -o ro ${LOOP_DEV}p1 ${P1}
if [ $? -ne 0 ]; then
    echo "mount failed"
    losetup -D
    exit 1
else
    echo "ok"
fi

echo -n "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 failed"
    umount -f ${P1}
    losetup -D
    exit 1
else
    echo "ok"
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 ${NEW_ROOT_MP}"
umount -f "${NEW_ROOT_MP}"
if [ $? -ne 0 ]; then
    echo "umount failed, please reboot and try again!"
    umount -f ${P1}
    umount -f ${P2}
    losetup -D
    exit 1
fi

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

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

# begin copy rootfs
cd ${NEW_ROOT_MP}
echo "Start copy data from ${P2} to ${NEW_ROOT_MP} ..."
ENTRYS=$(ls)
for entry in $ENTRYS; do
    if [ "$entry" == "lost+found" ]; then
        continue
    fi
    echo -n "remove old $entry ... "
    rm -rf $entry
    if [ $? -eq 0 ]; then
        echo "ok"
    else
        error_msg "failed"
    fi
done
echo

echo "create etc subvolume ..."
btrfs subvolume create etc
echo -n "make dirs ... "
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
echo "done"
echo

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

SHFS="/mnt/${EMMC_NAME}${PARTITION_NAME}4"
echo "Modify config files ... "
rm -f "./etc/rc.local.orig" "./etc/first_run.sh" "./etc/part_size"
rm -f ./etc/bench.log
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
cat >./etc/fstab <<EOF
UUID=${NEW_ROOT_UUID} / btrfs compress=zstd:${ZSTD_LEVEL} 0 1
LABEL=${LB_PRE}BOOT /boot 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'
        option label '${LB_PRE}BOOT'
        option enabled '1'
        option enabled_fsck '0'
        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 the first etc snapshot -> .snapshots/etc-000"
btrfs subvolume snapshot -r etc .snapshots/etc-000

[ -d ${SHFS}/docker ] || mkdir -p ${SHFS}/docker
rm -rf opt/docker && ln -sf ${SHFS}/docker/ opt/docker

if [ -f /mnt/${NEW_ROOT_NAME}/etc/config/AdGuardHome ]; then
    [ -d ${SHFS}/AdGuardHome/data ] || mkdir -p ${SHFS}/AdGuardHome/data
    if [ ! -L /usr/bin/AdGuardHome ]; then
        [ -d /usr/bin/AdGuardHome ] &&
            cp -a /usr/bin/AdGuardHome/* ${SHFS}/AdGuardHome/
    fi
    ln -sf ${SHFS}/AdGuardHome /mnt/${NEW_ROOT_NAME}/usr/bin/AdGuardHome
fi

BOOTLOADER="./lib/u-boot/u-boot-sunxi-with-spl.bin"
if [ -f ${BOOTLOADER} ]; then
    echo "update u-boot ... "
    # erase from 8kb to 4mb
    dd if=/dev/zero of=/dev/${EMMC_NAME} bs=1024 seek=8 count=4088 conv=fsync
    # write u-boot
    dd if=${BOOTLOADER} of=/dev/${EMMC_NAME} bs=1024 seek=8 conv=fsync
    echo "done"
fi
sync
echo "copy done"
echo

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

    # 还原 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 "done"
    echo
fi

rm -f ./etc/bench.log
cat >>./etc/crontabs/root <<EOF
17 3 * * * /etc/coremark.sh
EOF

sed -e 's/ttyAMA0/ttyS0/' -i ./etc/inittab
sss=$(date +%s)
ddd=$((sss / 86400))
sed -e "s/:0:0:99999:7:::/:${ddd}:0:99999:7:::/" -i ./etc/shadow
# 修复amule每次升级后重复添加条目的问题
sed -e "/amule:x:/d" -i ./etc/shadow
# 修复dropbear每次升级后重复添加sshd条目的问题
sed -e "/sshd:x:/d" -i ./etc/shadow
if ! grep "sshd:x:22:sshd" ./etc/group >/dev/null; then
    echo "sshd:x:22:sshd" >>./etc/group
fi
if ! grep "sshd:x:22:22:sshd:" ./etc/passwd >/dev/null; then
    echo "sshd:x:22:22:sshd:/var/run/sshd:/bin/false" >>./etc/passwd
fi
if ! grep "sshd:x:" ./etc/shadow >/dev/null; then
    echo "sshd:x:${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
    echo "done"
    echo
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
)
sync

eval tar czf .reserved/openwrt_config.tar.gz "${BACKUP_LIST}" 2>/dev/null

rm -f ./etc/part_size ./etc/first_run.sh
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
opkg remove --force-removal-of-dependent-packages shairport-sync-openssl
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 the second etc snapshot -> .snapshots/etc-001"
btrfs subvolume snapshot -r etc .snapshots/etc-001

# 2021.04.01添加
# 强制锁定fstab,防止用户擅自修改挂载点
# 开启了快照功能之后，不再需要锁定fstab
#chattr +ia ./etc/config/fstab

cd ${WORK_DIR}

echo "Start copy data from ${P1} to /boot ..."
cd /boot
echo -n "remove old boot files ..."
rm -rf *
echo "done"
echo -n "copy new boot files ... "
(cd ${P1} && tar cf - .) | tar xf -
sync
echo "done"
echo

echo -n "Update boot args ... "
cat >uEnv.txt <<EOF
LINUX=/zImage
INITRD=/uInitrd

# Example:
#   FDT=/dtb/allwinner/sun50i-h6-vplus-cloud.dtb
#   FDT=/dtb/allwinner/sun50i-h6-vplus-cloud-2ghz.dtb
FDT=/dtb/allwinner/${MYDTB_FDTFILE}

APPEND=root=UUID=${NEW_ROOT_UUID} rootfstype=btrfs rootflags=compress=zstd:${ZSTD_LEVEL} console=ttyS0,115200n8 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
EOF

# Compatible with armbianEnv.txt file
[[ -f "armbianEnv.txt" ]] && {
    echo "Update armbianEnv.txt settings."
    sed -i "s|^rootdev=.*|rootdev=UUID=${NEW_ROOT_UUID}|g" armbianEnv.txt
    rm -f uEnv.txt
}

# Replace the UUID for extlinux/extlinux.conf if it exists
[[ -f "extlinux/extlinux.conf" ]] && {
    sed -i -E "s|UUID=[^ ]*|UUID=${NEW_ROOT_UUID}|" extlinux/extlinux.conf 2>/dev/null
}

sync
echo "done"
echo

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

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