1 files changed, 9 insertions, 0 deletions

diff --git a/hook b/hook
new file mode 100644
index 000000000000..2ae023927d61
--- /dev/null
+++ b/hook
@@ -0,0 +1,9 @@
+run_hook() {
+    dir_pre_mount_handler="${mount_handler:-default_mount_handler}"
+    mount_handler=dir_mount_handler
+}
+
+dir_mount_handler() {
+    $dir_pre_mount_handler "$1"
+    mount --bind -- "$1/$dir" "$1"
+}