From ee6925eeb63550db84667aec35d40e5e2e1f7589 Mon Sep 17 00:00:00 2001
From: Bob Mottram <bob@freedombone.net>
Date: Mon, 7 Aug 2017 14:46:08 +0100
Subject: [PATCH] Test for predictable device names

---
 src/freedombone-utils-wifi | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/freedombone-utils-wifi b/src/freedombone-utils-wifi
index cdfa4ee7..2e3bfb38 100755
--- a/src/freedombone-utils-wifi
+++ b/src/freedombone-utils-wifi
@@ -49,8 +49,11 @@ function default_network_config {
 # device names get assigned random names. This is a hacky workaround.
 # Also adding net.ifnames=0 to kernel options on bootloader may work.
 function enable_predictable_device_names {
-    ln -s /dev/null /etc/udev/rules.d/80-net-setup-link.rules
-    update-initramfs -u
+    test_predictable=$(ls -la /etc/udev/rules.d/80-net-setup-link.rules)
+    if [[ "$test_predictable" != *"/dev/null" ]]; then
+        ln -s /dev/null /etc/udev/rules.d/80-net-setup-link.rules
+        update-initramfs -u
+    fi
 }
 
 function wifi_is_running {