tar -g incr -cf arch.2 -v foo 2>tmperr
sort tmperr >&2
-tar xfg arch.1 /dev/null
+tar xfg arch.1 /dev/null --warning=no-timestamp
echo "Begin directory listing 1"
-find foo | sort
+find foo | sort
echo "End directory listing 1"
-tar xfgv arch.2 /dev/null
+tar xfgv arch.2 /dev/null --warning=no-timestamp
echo Begin directory listing 2
find foo | sort
echo End directory listing 2