#!/bin/bash

if [[ -z $1 || $1 =~ ^(--help|help|-h)$ ]]; then
	echo -e "\033[1mUsage\033[0m\n$0 \033[4marchive\033[0m\n\
$0 --help|help|-h\n\n\033[1mDescription\033[0m\n\
This script creates a userdata backup in a tgz \033[4marchive\033[0m from a connected phone via ADB root access.\n\
--help, help, -h\n\tDisplay this help and exit"
	exit 1
fi
adb shell 'ls /data/data' 1>/dev/null 2>&1
if [ $? -ne 0 ]; then
	echo "========================================================="
	echo "Killing ADB server"
	adb kill-server
	echo "Starting ADB server with sudo"
	adb start-server && sudo adb start-server
	echo "Starting ADB as root"
	adb root
	echo "========================================================="
fi

adb shell 'ls /data/data' 1>/dev/null 2>&1
if [ $? -eq 0 ]; then
	echo "Starting the backup ... be patient!"
	adb shell 'cd /data; tar czf - --exclude="[Cc]ache/*" data misc user_de system media app' 2>&1 >$1 | 
		grep -v "^tar: unknown file type" 1>&2
	echo "Done."
else
	echo -e "\033[1;31mError: No root access to phone\033[0m" 1>&2
fi