I had this laying around, figured someone might find it useful

contrib/pacdiff

@@ -0,0 +1,47 @@
+#!/bin/sh
+#   pacdiff : a simple pacnew/pacorig/pacsave updater for /etc/
+#
+#   Copyright (c) 2007 Aaron Griffin <aaronmgriffin@gmail.com>
+#
+#   This program is free software; you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation; either version 2 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program; if not, write to the Free Software
+#   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+#   USA.
+#
+
+# Original http://phraktured.net/config/bin/pacdiff
+
+diffprog=${DIFFPROG:-vimdiff}
+for x in $(find /etc/ -name *.pacnew -o -name *.pacorig -o -name *.pacsave)
+do
+    echo "File: ${x%.pac*}"
+    chk="$(cmp $x ${x%.pac*})"
+    if [ -z "${chk}" ]; then
+        echo "  Files are identical, removing..."
+        rm $x
+    else
+        echo -n "  File differences found. (V)iew, (S)kip, (R)emove: [v/s/r] "
+        read c
+        c="$(echo $c| tr A-Z a-z)" #tolower
+        if [ "$c" = "r" ]; then
+            rm $x
+        elif [ "$c" = "s" ]; then
+            continue
+        else
+            [ "$c" = "n" -o "$c" = "N" ] || $diffprog $x ${x%.pac*}
+            echo -n "  Remove file? [Y/n] "
+            read c
+            [ "$c" = "n" -o "$c" = "N" ] || rm $x
+        fi
+    fi
+done