Enter console if data partition is missing (#1055)

In case the data partition is missing avoid using the Docker command.
The Docker command triggers a socket activation, which in turn makes
systemd wait for the data partition. This blocks entry into the shell
forever.

Just enter the shell in case data partition is not mounted.

buildroot-external/rootfs-overlay/usr/sbin/hassos-cli

@@ -10,6 +10,11 @@ if [ "${TERM}" = "vt220" ] || [ "${TERM}" = "vt102" ] || \
 fi
 
 # Run CLI container
+if [ ! "$(findmnt /mnt/data)" ]; then
+    echo "[WARN] Data partition not mounted! Jump into emergency console..."
+    exec /bin/ash -l
+fi
+
 if [ "$(docker ps -q -f name=hassio_cli)" ]; then
     docker container exec \
         -ti hassio_cli \
@@ -21,7 +26,7 @@ if [ "$(docker ps -q -f name=hassio_cli)" ]; then
     fi
 else
     echo "[WARN] Home Assistant CLI is not running! Jump into emergency console..."
-    /bin/ash -l
+    exec /bin/ash -l
 fi
 
 exit