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#!/bin/sh
for param in $*; do
	case "$param" in
		*)
			INPUT_FILE="$param"
	esac
done

if [ "$INPUT_FILE" = "-" ]; then
	echo "Reading backup from stdin..." >&2
elif [ "$INPUT_FILE" = "" ]; then
	echo "No input file."
else
	echo "Reading backup from $INPUT_FILE" >&2
	exec < "$INPUT_FILE"
fi

process_line () {
	case "$SECTION" in
		ipkg)
			echo "$line" >> /etc/ipkg.conf
			;;
		nvram)
			echo nvram set "$line"
			;;
		package)
			if grep "^Package: $line" /usr/lib/ipkg/status 2>&1 > /dev/null; then
				echo Package "$line" already installed.
			else
				ipkg install "$line"
			fi
			;;
		file)
			rm -f "$line"
			;;
	esac
}

while true; do
	read line
	case "$line" in
		__IPKG__)
			SECTION=ipkg
			echo "Restoring /etc/ipkg.conf"
			rm -f /etc/ipkg.conf
			;;
		__NVRAM__)
			SECTION=nvram
			echo "Restoring nvram"
			;;
		__PACKAGES__)
			SECTION=package
			echo "Restoring packages"
			ipkg update
			;;
		__FILELIST__)
			SECTION=file
			echo "Deleting old files"
			;;
		__FILES__)
			echo "Restoring /etc"
			tar -C / -xvz
			echo "Restore complete."
			exit 0
			;;
		*)
			process_line;
			;;
	esac
done