+# Copyright (C) 2016 Ian Kelling
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# usage: $0 SUBVOL_MOUNTPOINT...
+#
+# In git, this is not not executable because it's meant to be installed
+# using ./install-my-scripts
+#
+# If latest subvols $@ are not mounted, exit 1, print message, and touch
+# /nocow/btrfs-stale/$subvol
+#
+# Either SUBVOL_MOUNTPOINT is a snapshot of the latest, or
+# the latest snapshot is snapshot of SUBVOL_MOUNTPOINT.