diff -r 0c6fb706f747 -r a03f245243b0 qmlfrontend/gameconfig.cpp
--- a/qmlfrontend/gameconfig.cpp	Sun Dec 24 00:44:16 2017 +0100
+++ b/qmlfrontend/gameconfig.cpp	Sun Dec 24 16:56:22 2017 +0100
@@ -1,6 +1,46 @@
 #include "gameconfig.h"
 
-GameConfig::GameConfig(QObject *parent) : QObject(parent)
+GameConfig::GameConfig()
+{
+    m_arguments
+        << ""
+        << "--internal"
+        << "--landpreview";
+}
+
+const char** GameConfig::argv() const
+{
+    m_argv.resize(m_arguments.size());
+
+    for (int i = 0; i < m_arguments.size(); ++i)
+        m_argv[i] = m_arguments[i].data();
+
+    return m_argv.data();
+}
+
+int GameConfig::argc() const
 {
+    return m_arguments.size();
+}
 
+void GameConfig::clear()
+{
+    m_arguments.clear();
+    m_cfg.clear();
 }
+
+void GameConfig::cmdSeed(const QByteArray& seed)
+{
+    cfgAppend("eseed " + seed);
+}
+
+void GameConfig::cmdMapgen(int mapgen)
+{
+    cfgAppend("e$mapgen " + QByteArray::number(mapgen));
+}
+
+void GameConfig::cfgAppend(const QByteArray& cmd)
+{
+    quint8 len = cmd.size();
+    m_cfg.append(QByteArray::fromRawData(reinterpret_cast<const char*>(&len), 1) + cmd);
+}