From 8a458860aaf0a0aa3a467417b3d828c58d5bc5fa Mon Sep 17 00:00:00 2001
From: Bob Mottram <bob@robotics.uk.to>
Date: Fri, 22 Aug 2014 11:17:32 +0100
Subject: [PATCH] tlsdate script better treatment of backward timewarps

---
 beaglebone.txt | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/beaglebone.txt b/beaglebone.txt
index 78562036..9b75c983 100644
--- a/beaglebone.txt
+++ b/beaglebone.txt
@@ -1031,6 +1031,7 @@ BEFORE_FULLDATE_FILE=/var/log/tlsdate.txt
 
 DATE_BEFORE=$(date)
 BEFORE=$(date -d "$Y-$M-$D" '+%s')
+BACKWARDS_BETWEEN=0
 
 # If the date was previously set
 if [[ -f "$BEFORE_DATE_FILE" ]]; then
@@ -1049,6 +1050,11 @@ if [[ -f "$BEFORE_DATE_FILE" ]]; then
 
 		# Try another time source
 		TIMESOURCE=$TIMESOURCE2
+
+        # try running without any parameters
+        tlsdate >> $LOGFILE
+
+        BACKWARDS_BETWEEN=1
     fi
 fi
 
@@ -1084,8 +1090,13 @@ else
 fi
 
 # Log the last date
-echo "$AFTER" > $BEFORE_DATE_FILE
-echo "$DATE_AFTER" > $BEFORE_FULLDATE_FILE
+if [ BACKWARDS_BETWEEN == 0 ]; then
+    echo "$AFTER" > $BEFORE_DATE_FILE
+    echo "$DATE_AFTER" > $BEFORE_FULLDATE_FILE
+    exit 0
+else
+    exit 1
+fi
 #+END_SRC
 
 Save and exit.