1 files changed, 62 insertions, 0 deletions
diff --git a/source3/lib/serverid.c b/source3/lib/serverid.c
new file mode 100644
index 0000000..70739c7
--- /dev/null
+++ b/source3/lib/serverid.c
@@ -0,0 +1,62 @@
+/*
+   Unix SMB/CIFS implementation.
+   Implementation of a reliable server_exists()
+   Copyright (C) Volker Lendecke 2010
+
+   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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "lib/util/server_id.h"
+#include "serverid.h"
+#include "lib/param/param.h"
+#include "ctdbd_conn.h"
+#include "lib/messages_ctdb.h"
+#include "lib/messaging/messages_dgm.h"
+
+static bool serverid_exists_local(const struct server_id *id)
+{
+	bool exists = process_exists_by_pid(id->pid);
+	uint64_t unique;
+	int ret;
+
+	if (!exists) {
+		return false;
+	}
+
+	if (id->unique_id == SERVERID_UNIQUE_ID_NOT_TO_VERIFY) {
+		return true;
+	}
+
+	ret = messaging_dgm_get_unique(id->pid, &unique);
+	if (ret != 0) {
+		return false;
+	}
+
+	return (unique == id->unique_id);
+}
+
+bool serverid_exists(const struct server_id *id)
+{
+	if (procid_is_local(id)) {
+		return serverid_exists_local(id);
+	}
+
+	if (lp_clustering()) {
+		return ctdbd_process_exists(messaging_ctdb_connection(),
+					    id->vnn, id->pid, id->unique_id);
+	}
+
+	return false;
+}