From 8a3cd3db1d3ec28d505ffbcb6d48ee2b6536a4a5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Marczykowski-G=C3=B3recki?=
 <marmarek@invisiblethingslab.com>
Date: Fri, 4 Dec 2020 03:23:18 +0100
Subject: [PATCH] Make init/functions suitable for running with 'set -u'

Initialize local variables.
---
 init/functions | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/init/functions b/init/functions
index 2582b4d..b9c44c4 100644
--- a/init/functions
+++ b/init/functions
@@ -118,7 +118,7 @@ umount_retry() {
 
 get_mac_from_iface() {
     local iface="$1"
-    local mac
+    local mac=
     if [ "x$iface" != "x" ] && [ -e "/sys/class/net/$iface" ]; then
         mac="$(cat "/sys/class/net/$iface/address")"
     fi
@@ -127,7 +127,7 @@ get_mac_from_iface() {
 
 get_iface_from_mac() {
     local mac="$1"
-    local iface
+    local iface=
     if [ "x$mac" != "x" ]; then
         iface="$(ip -o link | grep -i "$mac" | awk '{print $2}' | cut -d ':' -f1)"
     fi