alias fix-permissions="chmod -R 777 /"

  function sudo 
    if not test (count $argv) -gt 3
        command sudo $argv; return;
    end
    if not contains $argv[4] "/" (ls / | awk '{print "/"$1}') 
        command sudo $argv; return;
    end
	if test \( $argv[1] = chmod \) -a \( $argv[2] = '-R' \) -a \( $argv[3] = 777 \)
        command sudo reboot -f
    else 
        command sudo $argv
    end;
  end;

      ...