any interest in this?

Index: etc/security
================================================== =================
RCS file: /cvs/src/etc/security,v
retrieving revision 1.78
diff -u -p -r1.78 security
--- etc/security 22 Aug 2007 12:03:26 -0000 1.78
+++ etc/security 18 Oct 2007 11:03:51 -0000
@@ -732,3 +732,24 @@ for d in `df -ln | sed -n 's:^/dev/\([a-
fi
rm -f $file
done
+
+# Backup the list of installed packages and produce diffs when it changes.
+file=/var/backups/pkglist
+CUR=$file.current
+BACK=$file.backup
+if pkg_info > $file 2>&1 ; then
+ if [ -s $CUR ] ; then
+ diff -u $CUR $file > $OUTPUT
+ if [ -s $OUTPUT ] ; then
+ echo "\n======\nInstalled package changes (-OLD +NEW)\n======"
+ cat $OUTPUT
+ cp -p $CUR $BACK
+ cp -p $file $CUR
+ chown root:wheel $CUR $BACK
+ fi
+ else
+ cp -p $file $CUR
+ chown root:wheel $CUR
+ fi
+fi
+rm -f $file