#!/bin/bash

case "$1" in
	on)
		set -x
		mount --bind /proc    /ro/proc
		mount --bind /sys     /ro/sys
		mount --bind /dev     /ro/dev
		mount --bind /dev/pts /ro/dev/pts
	;;
	off)
		set -x
		umount /ro/dev/pts
		umount /ro/dev
		umount /ro/sys
		umount /ro/proc
	;;
	*)
		echo "Use: $0 (on|off)"
esac
