#!/bin/sh
# OpenIPC.org | 2025
scr_version=1.0.47

args="$@"
LOCK_FILE=/tmp/sysupgrade.lock

echo_c() {
	# 31 red, 32 green, 33 yellow, 34 blue, 35 magenta, 36 cyan, 37 white, 38 grey
	[ -z "$HASERLVER" ] && t="\e[1;$1m$2\e[0m" || t="$2"
	echo -e "$t"
}

die() {
	echo_c 31 "$1 Aborting."
	reboot_system
	exit 1
}

check_soc() {
	[ "1" = "$skip_soc" ] && echo "Skip SoC validation" && return 0
	[ "$1" = "$soc" ] && echo "SoC OK" && return 0
	die "Wrong SoC!"
}

compare_versions() {
	[ "1" = "$skip_ver" ] && echo "Skip version checking" && return 1
	[ "$1" = "$2" ] && echo_c 32 "Same version, nothing to update" && return 0
	echo_c 32 "New version, going to update" && return 1
}

do_update_kernel() {
	local x=$1
	[ -z "$x" ] && x="/tmp/uImage.$soc"
	echo_c 33 "\nKernel"
	echo "Update kernel from $x"
	[ ! -f "$x" ] && die "File $x not found"
	if [ "1" != "$skip_soc" ]; then
		local ksoc=$(od -j 32 -N 32 -S 1 -A n "$x" | cut -d- -f3)
		# FIXME: Ingenic kernels do not include proper SoC identifiers.
		case "$soc" in
			t31) [ "t" != "$ksoc" ] && die "Wrong SoC!" ;;
			t21) [ "" != "$ksoc" ] && die "Wrong SoC!" ;;
			*) check_soc "$ksoc"
		esac
		compare_versions "$kernel_version" "$(get_kernel_version "$x")" && return 0
	fi
	set_progress flashcp -v "$x" "$kernel_device"
	echo_c 32 "Kernel updated to $(get_kernel_version "$kernel_device")"
}

do_update_rootfs() {
	local x=$1
	[ -z "$x" ] && x="/tmp/rootfs.squashfs.$soc"
	echo_c 33 "\nRootFS"
	echo "Update rootfs from $x"
	[ ! -f "$x" ] && die "File $x not found"
	local y=/tmp/rootfs
	if mkdir -p "$y" && loop=$(losetup -f) && losetup "$loop" "$x" && mount "$loop" "$y"; then
		rootfs_version=$(get_system_version "$y")
		check_soc "$(head -1 $y/etc/hostname | cut -d- -f2)"
		compare_versions "$system_version" "$rootfs_version" && exit_update=1
		umount "$y" && rm -rf "$y" && losetup -d "$loop"
		[ "1" = "$exit_update" ] && return 0
	else
		die "Unable to mount $y!"
	fi
	set_progress flashcp -v "$x" "$(get_device "rootfs")"
	echo_c 32 "RootFS updated to $rootfs_version"
}

do_wipe_overlay() {
	echo_c 33 "\nOverlayFS"
	echo "Erase overlay partition"
	[ "$flash_type" = "nand" ] || jffs2="-j"
	set_progress flash_eraseall $jffs2 "$(get_device "rootfs_data")"
}

download_firmware() {
	[ "$flash_type" = "nand" ] && echo_c 31 "\nNote: the updater uses the NOR package for updating NAND"
	echo_c 33 "\nFirmware"
	osr=$(get_system_build)
	build="$soc-nor-$osr"
	if [ -n "$archive" ]; then
		[ ! -f "$archive" ] && die "File $archive not found"
		gzip -d "$archive" -c | tar xf - -C /tmp && echo_c 32 "Local archive unpacked" || die "Cannot extract $archive"
	else
		[ "$osr" = "lite" ] || [ "$osr" = "ultimate" ] && repo=firmware
		[ -z "$url" ] && url=$(fw_printenv -n upgrade || echo "https://github.com/OpenIPC/${repo:-builder}/releases/download/latest/openipc.$build.tgz")
		echo "Download from $url"
		[ "$(curl -o /dev/null -s -k -w '%{http_code}\n' "$url")" = "000" ] && die "Check your network!"
		curl --connect-timeout 30 -s -k -m 120 -L "$url" -s -o - | gzip -d | tar xf - -C /tmp && echo_c 32 "Received and unpacked" || die "Cannot retrieve $url"
	fi
	if [ "1" != "$skip_md5" ]; then
		(cd /tmp && md5sum -s -c *.md5sum) || die "Wrong checksum!"
	fi
}

free_resources() {
	echo_c 37 "\nStop services, sync files, free up memory"
	killall -q -3 majestic
	sleep 1
	/etc/init.d/S99rc.local stop
	/etc/init.d/S60crond stop
	/etc/init.d/S49ntpd stop
	/etc/init.d/S02klogd stop
	/etc/init.d/S01syslogd stop
	sleep 1

	sync
	echo 3 > /proc/sys/vm/drop_caches
	echo_c 34 "\nUptime:"
	uptime
	echo_c 34 "\nMemory:"
	free -h
	echo_c 34 "\nProcesses:"
	ps | grep -v '\['
}

set_progress() {
	if [ "1" = "$silent_update" ]; then
		busybox "$@" | awk '{print NR, $1}'
	else
		busybox "$@"
	fi
}

sync_time() {
	echo_c 37 "\nSynchronizing time"
	ntpd -Nnq
	echo_c 33 "$(date)"
}

self_update() {
	if echo "$args" | grep -E "\-(k|r|w|url)" >/dev/null 2>&1; then
		sync_time
		echo -e "\nChecking for sysupgrade update..."
		curl -s -k -L -o /tmp/sysupgrade "https://raw.githubusercontent.com/OpenIPC/firmware/master/general/overlay/usr/sbin/sysupgrade"
		if [ -f /tmp/sysupgrade ] && grep -q "#!/bin/sh" /tmp/sysupgrade; then
			dstv=$(grep scr_version /tmp/sysupgrade | head -1 | cut -f 2 -d '=')
			if ! [ "$scr_version" = "$dstv" ]; then
				echo "A new version is available, trying to activate updated script..."
				chmod +x /tmp/sysupgrade
				echo -e "Done. Restarting...\n"
				exec /tmp/sysupgrade $args
				exit 1
			else
				echo "Same version. No update required."
			fi
		else
			echo -e "\nVersion checking failed, proceeding with the installed version."
		fi
	else
		echo -e "\nOffline operations."
	fi
}

check_sdcard() {
	echo_c 33 "\nUnmounting SD card"
	stoplist="autoupdate-kernel.img autoupdate-rootfs.img autoupdate-uboot.img"
	while [ -n "$(mount | grep /mnt/mmc)" ]; do
		local d=$(mount | grep /mnt/mmc | tail -1 | awk '{print $3}')
		echo_c 34 "$d"
		local f
		for f in $stoplist; do
			echo "- checking for $d/$f"
			if [ -f "$d/$f" ]; then
				echo_c 31 "\nCannot upgrade! Recovery file $d/$f found on the mounted SD card!"
				echo_c 37 "Please remove the card from the slot and restart sysupgrade."
				exit 1
			fi
		done
		umount $d
	done
}

create_lock() {
	if [ -f $LOCK_FILE ]; then
		echo_c 31 "\nAnother sysupgrade process is already running!"
		exit 1
	fi
	touch $LOCK_FILE
}

get_device() {
	echo -n "/dev/$(grep "\"$1\"" /proc/mtd | cut -d: -f1)"
}

get_kernel_version() {
	date "+%H:%M:%S %Y-%m-%d" @$((0x$(xxd -l 4 -s 8 -p "$1" | xargs)))
}

get_system_info() {
	vendor=$(ipcinfo -v)
	soc=$(fw_printenv -n soc) || die "SoC is not defined in U-Boot environment"
	kernel_device=$(get_device "kernel")
	kernel_version=$(get_kernel_version "$kernel_device")
	system_version=$(get_system_version "")
	flash_type=$(ipcinfo -F)
}

get_system_version() {
	grep "GITHUB_VERSION" "$1/etc/os-release" | head -1 | cut -d= -f2 | sed 's/"//g'
}

get_system_build() {
	grep "BUILD_OPTION" "/etc/os-release" | head -1 | cut -d= -f2
}

print_sysinfo() {
	get_system_info
	echo_c 33 "OpenIPC System Updater v$scr_version"
	echo_c 36 "\nVendor\t$vendor\nSoC\t$soc\nKernel\t$kernel_version\nRootFS\t$system_version"
}

print_usage() {
	echo "
Usage: $0 [options]
Where:
  -k                    Update kernel from online repository.
  -r                    Update rootfs from online repository.
      --url=[URL]       Custom URL to update from (.tgz format).
      --archive=[FILE]  Custom archive to update from (.tgz format).
      --kernel=[FILE]   Update kernel from file (uImage format).
      --rootfs=[FILE]   Update rootfs from file (squashfs format).
  -f, --force_all       Do not validate anything.
  -n, --wipe_overlay    Wipe overlay partition.
  -x, --no_reboot       Do not reboot after updating.
  -z, --no_update       Do not update self.
  -h, --help            Display this help and exit.
"
}

reboot_system() {
	if [ "1" = "$skip_reboot" ]; then
		echo_c 33 "\nYou asked me not to reboot, so I won't."
		echo_c 31 "Although a reboot is required to apply the changes."
		echo_c 37 "Please reboot the camera manually whenever possible."
		rm $LOCK_FILE
		exit 1
	else
		echo_c 37 "\nUnconditional reboot"
		busybox reboot -d 1 -f
	fi
}

for i in "$@"; do
	case $i in
		-h | --help)
			print_sysinfo
			print_usage
			exit 0
			;;

		-k)
			update_kernel=1
			remote_update=1
			shift
			;;

		--kernel=*)
			update_kernel=1
			kernel_file="${i#*=}"
			[ "$kernel_file" != ${kernel_file#/mnt/mmc} ] && skip_unmount=1
			shift
			;;

		-r)
			update_rootfs=1
			remote_update=1
			shift
			;;

		--rootfs=*)
			update_rootfs=1
			rootfs_file="${i#*=}"
			[ "$rootfs_file" != ${rootfs_file#/mnt/mmc} ] && skip_unmount=1
			shift
			;;

		--url=*)
			update_kernel=1
			update_rootfs=1
			remote_update=1
			url="${i#*=}"
			shift
			;;

		--archive=*)
			update_kernel=1
			update_rootfs=1
			remote_update=1
			skip_selfupdate=1
			archive="${i#*=}"
			shift
			;;

		-f | --force_all | --force_md5 | --force_soc | --force_ver)
			skip_md5=1
			skip_soc=1
			skip_ver=1
			shift
			;;

		-n | --wipe_overlay)
			clear_overlay=1
			shift
			;;

		-x | --no_reboot)
			skip_reboot=1
			shift
			;;

		-z | --no_update)
			skip_selfupdate=1
			shift
			;;

		-s)
			silent_update=1
			shift
			;;

		*)
			print_sysinfo
			echo_c 37 "\nUnknown option: $1"
			print_usage
			exit 1
			;;
	esac
done

print_sysinfo

[ "1" != "$clear_overlay" ] &&
[ "1" != "$update_kernel" ] &&
[ "1" != "$update_rootfs" ] &&
	echo_c 37 "\nTry '$(basename "$0") --help' for options." &&
	exit 0

[ "1" != "$skip_selfupdate" ] && self_update

create_lock
free_resources

[ "1" != "$skip_unmount" ] && check_sdcard
[ "1" = "$remote_update" ] && download_firmware
[ "1" = "$update_kernel" ] && do_update_kernel "$kernel_file"
[ "1" = "$update_rootfs" ] && do_update_rootfs "$rootfs_file"
[ "1" = "$clear_overlay" ] && do_wipe_overlay

reboot_system

exit 0