Codechange: move main function(s) to separate files

src/os/unix/unix_main.cpp

@@ -0,0 +1,33 @@
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD 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, version 2.
+ * OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file unix_main.cpp Main entry for Unix. */
+
+#include "../../stdafx.h"
+#include "../../openttd.h"
+#include "../../crashlog.h"
+#include "../../core/random_func.hpp"
+#include "../../string_func.h"
+
+#include <time.h>
+#include <signal.h>
+
+#include "../../safeguards.h"
+
+int CDECL main(int argc, char *argv[])
+{
+	/* Make sure our arguments contain only valid UTF-8 characters. */
+	for (int i = 0; i < argc; i++) StrMakeValidInPlace(argv[i]);
+
+	CrashLog::InitialiseCrashLog();
+
+	SetRandomSeed(time(nullptr));
+
+	signal(SIGPIPE, SIG_IGN);
+
+	return openttd_main(argc, argv);
+}