core: split signal/pidfile/option handling into separate source file

We'll use this from more than one spot.

src/main-utils.h

@@ -0,0 +1,39 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
+/* NetworkManager -- Network link manager
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Copyright (C) 2014 Red Hat, Inc.
+ */
+
+#ifndef __MAIN_UTILS_H__
+#define __MAIN_UTILS_H__
+
+#include <glib.h>
+
+gboolean nm_main_utils_setup_signals (GMainLoop *main_loop, gboolean *quit_early_ptr);
+
+gboolean nm_main_utils_write_pidfile (const char *pidfile);
+
+gboolean nm_main_utils_check_pidfile (const char *pidfile, const char *name);
+
+gboolean nm_main_utils_early_setup (const char *progname,
+                                    char **argv[],
+                                    int *argc,
+                                    GOptionEntry *options,
+                                    GOptionEntry *more_options,
+                                    const char *summary);
+
+#endif /* __MAIN_UTILS_H__ */