--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cmd/octreediff/db.go	Mon Feb 25 17:02:33 2019 +0100
@@ -0,0 +1,52 @@
+// This is Free Software under GNU Affero General Public License v >= 3.0
+// without warranty, see README.md and license for details.
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+// License-Filename: LICENSES/AGPL-3.0.txt
+//
+// Copyright (C) 2018 by via donau
+//   – Österreichische Wasserstraßen-Gesellschaft mbH
+// Software engineering by Intevation GmbH
+//
+// Author(s):
+//  * Sascha L. Teichmann <sascha.teichmann@intevation.de>
+
+package main
+
+import (
+	"database/sql"
+	"flag"
+
+	"github.com/jackc/pgx"
+	"github.com/jackc/pgx/stdlib"
+)
+
+var (
+	dbhost     = flag.String("dbhost", "localhost", "database host")
+	dbport     = flag.Uint("dbport", 5432, "database port")
+	dbname     = flag.String("dbname", "gemma", "database user")
+	dbuser     = flag.String("dbuser", "scott", "database user")
+	dbpassword = flag.String("dbpw", "tiger", "database password")
+	dbssl      = flag.String("dbssl", "prefer", "database SSL mode")
+)
+
+func run(fn func(*sql.DB) error) error {
+
+	// To ease SSL config ride a bit on parsing.
+	cc, err := pgx.ParseConnectionString("sslmode=" + *dbssl)
+	if err != nil {
+		return err
+	}
+
+	// Do the rest manually to allow whitespace in user/password.
+	cc.Host = *dbhost
+	cc.Port = uint16(*dbport)
+	cc.User = *dbuser
+	cc.Password = *dbpassword
+	cc.Database = *dbname
+
+	db := stdlib.OpenDB(cc)
+	defer db.Close()
+
+	return fn(db)
+}