1 files changed, 82 insertions, 0 deletions
diff --git a/src/systemd.c b/src/systemd.c
new file mode 100644
index 0000000..4eb880c
--- /dev/null
+++ b/src/systemd.c
@@ -0,0 +1,82 @@
+/*
+ * (C) 2015 by Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "systemd.h"
+#include "conntrackd.h"
+#include "alarm.h"
+#include <systemd/sd-daemon.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <string.h>
+
+static struct alarm_block	sd_watchdog;
+static uint64_t			sd_watchdog_interval;
+
+static void sd_ct_watchdog_alarm(struct alarm_block *a, void *data)
+{
+	sd_notify(0, "WATCHDOG=1");
+	add_alarm(&sd_watchdog, 0, sd_watchdog_interval);
+}
+
+void sd_ct_watchdog_init(void)
+{
+	int ret;
+
+	if (CONFIG(systemd) == 0)
+		return;
+
+	ret = sd_watchdog_enabled(0, &sd_watchdog_interval);
+	if (ret < 0) {
+		fprintf(stderr, "WARNING: failed to get watchdog details from"
+				" systemd: %s\n", strerror(-ret));
+		return;
+	} else if (ret == 0) {
+		/* no watchdog required */
+		return;
+	}
+
+	/* from man page, recommended interval is half of set by admin */
+	sd_watchdog_interval = sd_watchdog_interval / 2;
+
+	init_alarm(&sd_watchdog, &sd_watchdog_interval, sd_ct_watchdog_alarm);
+	add_alarm(&sd_watchdog, 0, sd_watchdog_interval);
+}
+
+void sd_ct_init(void)
+{
+	if (CONFIG(systemd) == 0)
+		return;
+
+	sd_notify(0, "READY=1");
+}
+
+void sd_ct_mainpid(pid_t pid)
+{
+	if (CONFIG(systemd) == 0)
+		return;
+
+	sd_notifyf(0, "MAINPID=%d", pid);
+}
+
+void sd_ct_stop(void)
+{
+	if (CONFIG(systemd) == 0)
+		return;
+
+	sd_notify(0, "STOPPING=1");
+}