1 DPkg {

     2   Pre-Invoke {

     3     "wc -l < /var/log/apt/history.log > /tmp/lines_count.dat";

     4   };

     5   Post-Invoke {

     6     "test -x /usr/sbin/apt-feed-logbuch && /usr/sbin/apt-feed-logbuch $(echo $PPID) || true";

     7   };

     8 };