os.pullEvent = os.pullEventRaw
term.clear()
term.setCursorPos(1,1)
datei = fs.open("user", "w")
write("Username:")
User = io.read()
function Hallo()
print()
print("Welcome!")
sleep(1)
term.clear()
term.setCursorPos(1,1)
datei.write(User)
datei.close()
if User == "root" then
  shell.run("cd /")
else
shell.run("cd /home/"..User)
print("Hello, "..User)
end
end
if fs.exists("/userlist/"..User) == true then
  userfile = fs.open("/userlist/"..User,"r")
  passwd = userfile.readLine()
  userfile.close()
  if passwd == "nil" then
    Hallo()
  elseif passwd == "locked" then
    print()
    print("User was locked!")
    sleep(3)
    os.shutdown()
  else
   print()
   write("Password:")
   passwort = read("*")
   if passwort == passwd then
     Hallo()
   else
     print()
     term.setTextColor(colors.red)
     print("Wrong Password!")
     sleep(3)
     os.shutdown()
   end
  end
else
  print()
  term.setTextColor(colors.red)
  print("User does not exist")
  sleep(2)
  os.shutdown()
 end