From c41d543d811c0a684c45a62b323e6165185cbc4b Mon Sep 17 00:00:00 2001
From: Dan Schaper <dschaper@ganymeade.com>
Date: Mon, 26 Sep 2016 18:27:02 -0700
Subject: [PATCH] Handle lack of IPv6 gracefully.

---
 advanced/Scripts/piholeDebug.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/advanced/Scripts/piholeDebug.sh b/advanced/Scripts/piholeDebug.sh
index cccf45d6..f38947b9 100755
--- a/advanced/Scripts/piholeDebug.sh
+++ b/advanced/Scripts/piholeDebug.sh
@@ -96,8 +96,12 @@ function ipCheck {
     echo "::: Writing local IPs to logfile"
     IPADDR=$(ip a | awk -F " " '{ for(i=1;i<=NF;i++) if ($i == "inet") print $(i+1) }')
     echo "$IPADDR" >> ${DEBUG_LOG}
+
     IP6ADDR=$(ip a | awk -F " " '{ for(i=1;i<=NF;i++) if ($i == "inet6") print $(i+1) }')
+    if [ -n "$IP6ADDR" ]
+    then
     echo "$IP6ADDR" >> ${DEBUG_LOG}
+    fi
     echo >> ${DEBUG_LOG}
 
     echo "::: Locating default gateway and checking connectivity"