Adding duration calculation

Additional checks if image source is available

piwirefresh.sh

@@ -1,8 +1,24 @@
 #!/bin/bash
 
+mountedCheckFile="/home/network/Qbilder/photos/.mounted"
 catId=0
 subCatId=1
 
+STARTTIME=$(date +%s)
+
+# -s : file exists and has a size greater than zero
+if [ ! -s "$mountedCheckFile" ] ; then
+  echo "[refresh] Network not available (exists: $mountedCheckFile)"
+  exit 1;
+fi
+
+# check if the file is really readable and contains text
+mounted=$(cat "$mountedCheckFile" 2>>/dev/null)
+if [ -z $mounted ] ; then
+  echo "[refresh] Network not available (content: $montedCheckFile)"
+  exit 1;
+fi
+
 if [ "$1" != "" ] && [ "$2" != "" ]
 then
   catId=$1
@@ -20,3 +36,6 @@ perl -w /root/script/piwigo_refresh.pl \
   --privacy_level=4 \
   --cat=${catId} \
   --subcat=${subCatId}
+
+ENDTIME=$(date +%s)
+echo "Refresh took: $((($ENDTIME - $STARTTIME)/60)) minutes"