Exit if no more trackers found

Author: ryzhovau

tracker-add.sh

@@ -5,12 +5,17 @@ base_url='http://torrentz.eu'
 pattern='announcelist_[0-9]+'
 
 if [ -z "$1" ] ; then
-    echo "usage: ./tracker-add sh <hash>"
+    echo 'Usage: ./tracker-add sh <hash>'
     exit 1
 fi
 
 announce_list=`curl -s ${base_url}/${torrent_hash} | grep -Eo "${pattern}"`
 
+if [ -z "$announce_list" ] ; then
+    echo 'No additional trackers found, sorry.'
+    exit 1
+fi
+
 for tracker in $(curl -s ${base_url}/${announce_list})
 do
   echo "Adding ${tracker} to torrent ${torrent_hash}"