network: Fail if no master device has been configured for slave zones

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/config/udev/network-hotplug-master b/config/udev/network-hotplug-master
index 4fa1154c2a2996cb6255e68dc067f63bd7437f4c..b61b657bb80fc05c0aa2a0cdc27d8f3111e94638 100644 (file)
--- a/config/udev/network-hotplug-master
+++ b/config/udev/network-hotplug-master
@@ -86,6 +86,12 @@ fi
 # The name of the virtual master interface
 MASTER="$(get_value "${ZONE}_DEV")"
 
+# Fail if no master device has been configured
+if [ -z "${MASTER}" ]; then
+       logger "No ${ZONE}_DEV configured"
+       exit 1
+fi
+
 # Fetch the MTU
 MTU="$(get_value "${ZONE}_MTU")"