#!/bin/sh
  
  UART0_SERVICE=serial-getty@ttymxc0.service
  UART1_SERVICE=serial-getty@ttymxc1.service
  UART2_SERVICE=serial-getty@ttymxc2.service
  UART3_SERVICE=serial-getty@ttymxc3.service
  
  tty_service_enabled()
  {
  	test -f /etc/systemd/system/getty.target.wants/$1
  }
  
  if tty_service_enabled ${UART0_SERVICE}; then
  	systemctl stop ${UART0_SERVICE}
  	systemctl disable ${UART0_SERVICE}
  	systemctl enable ${UART1_SERVICE}
  fi