Index: scripts/wifi_read_ip_settings.sh
===================================================================
diff -u -r2085962f7bd0a2239ee5c857928a11d5e38fe0a2 -r0629dfe6bcc3e85047319284fa4c534efbf58594
--- scripts/wifi_read_ip_settings.sh	(.../wifi_read_ip_settings.sh)	(revision 2085962f7bd0a2239ee5c857928a11d5e38fe0a2)
+++ scripts/wifi_read_ip_settings.sh	(.../wifi_read_ip_settings.sh)	(revision 0629dfe6bcc3e85047319284fa4c534efbf58594)
@@ -1,4 +1,10 @@
 #!/bin/sh
 
+if [ $# -eq 0 ]; then
+    currentFile=$(basename "$0")
+    echo "Usage: ./$currentFile <iface>"
+    exit 0
+fi
+
 iface=$1
 ifconfig $iface | grep "inet "