Added duration cmd to radioctl.

tools/radioctl

@@ -30,11 +30,16 @@ case $1 in
         done
         break
         ;;
+    d | duration)
+        find $radio_dir/music -iname '*.ogg' -exec ffprobe -i "{}" \
+            -show_entries format=duration -v quiet -of csv="p=0" \; |
+            paste -s -d+ - | bc
     *)
         echo "f|ilelist - to generate a filelist.html"
         echo "p|laylist - to generate a playlist 'all'"
         echo "s|huffle - to shuffle a playlist and store as all-rand"
         echo "c|onvert DIR - convert all files in DIR to ogg"
+        echo "d|uration - get total songs' duration"
         exit
         ;;
 esac