lib: Add library code to interact with systemd

Modify the lib/ code to include the ability to interact
with systemd.  Provide the ability to interact with
systemd's watchdog timer as well.

There is no code here that actually uses this change.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/lib/systemd.h b/lib/systemd.h
new file mode 100644
index 0000000000..aef9c8ec82
--- /dev/null
+++ b/lib/systemd.h
@@ -0,0 +1,34 @@
+/* lib/systemd Code
+   Copyright (C) 2016 Cumulus Networks, Inc.
+   Donald Sharp
+
+This file is part of Quagga.
+
+Quagga 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, or (at your option) any
+later version.
+
+Quagga 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 Quagga; see the file COPYING.  If not, write to the Free
+Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.  */
+
+/*
+ * Wrapper functions to systemd calls.
+ *
+ * Design point is that if systemd is not being used on this system
+ * then these functions becomes a no-op.
+ *
+ * To turn on systemd compilation, use --enable-systemd on
+ * configure run.
+ */
+void systemd_send_information (const char *info);
+void systemd_send_stopping (void);
+void systemd_send_started (struct thread_master *);
+