Ensure that any stuck notification process gets killed

src/freedombone-notification

@@ -33,6 +33,16 @@ SUBJECT=
 MESSAGE=
 COMPLETION_FILE=/root/${PROJECT_NAME}-completed.txt
 
+function kill_xsend_process {
+    # Sometimes the process can get stuck, so ensure that
+    # it gets killed if necessary
+    # shellcheck disable=SC2009
+    xsend_pid=$(ps ax | grep /tmp/xsend | grep -v grep | awk -F ' ' '{print $1}')
+    if [ "$xsend_pid" ]; then
+        kill -9 "$xsend_pid"
+    fi
+}
+
 while [ $# -gt 1 ]
 do
     key="$1"
@@ -139,9 +149,12 @@ if [ -d /etc/prosody ]; then
             MESSAGE="$SUBJECT"
         fi
 
+        kill_xsend_process
         echo "$MESSAGE" | python2 /tmp/xsend "$ADMIN_EMAIL_ADDRESS"
         systemctl restart prosody
         rm /tmp/xsend
+        kill_xsend_process
+
     fi
     prosodyctl deluser "notification@$HOSTNAME"
 fi