Enter Mirror Can Now Run Scripts in Mirror

This is not something I've wanted to use it for.
This just seemed like the right place to put this functionality.

The functionality is about to be put to use by build_mirror.

enter_mirror

@@ -3,6 +3,10 @@
 DATA_LOCATION="/mnt/easy_mirror"
 MIRROR_NAME="$1"
 
+if [ "$#" -gt 0 ]; then
+	shift
+fi
+
 if [ '!' -d "$DATA_LOCATION" ]; then
 	echo "There are no active mirrors" >&2
 	exit 1
@@ -24,4 +28,10 @@ if [ -z "$MIRROR_NAME" ]; then
 	fi
 fi
 
-chroot "$DATA_LOCATION/$MIRROR_NAME/union" su -l "$SUDO_USER"
+if [ "$#" = 0 ]; then
+	# We weren't given a command, so just run a shell
+	chroot "$DATA_LOCATION/$MIRROR_NAME/union" su -l "$SUDO_USER"
+else
+	# Run the commands we were given
+	chroot "$DATA_LOCATION/$MIRROR_NAME/union" sudo -u "$SUDO_USER" "$@"
+fi