-
-# if latest subvols $@ are not mounted, exit 1, print message, and touch /nocow/btrfs-stale/$subvol
+# 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.