Inital commit

apps/backend/backend_lock.c

@@ -0,0 +1,95 @@
+/*
+ *
+  Copyright (C) 2009-2016 Olof Hagsand and Benny Holmgren
+
+  This file is part of CLICON.
+
+  CLICON 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.
+
+  CLICON 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 CLICON; see the file COPYING.  If not, see
+  <http://www.gnu.org/licenses/>.
+
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "clicon_config.h" /* generated by config & autoconf */
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <signal.h>
+#include <fcntl.h>
+#include <time.h>
+#include <syslog.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <sys/param.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <assert.h>
+#include <netinet/in.h>
+
+/* cligen */
+#include <cligen/cligen.h>
+
+/* clicon */
+#include <clicon/clicon.h>
+
+#include "backend_lock.h"
+
+/*
+ * Easy way out: store an integer for candidate db which contains
+ * the session-id of the client holding the lock.
+ * more general: any database
+ * we dont make any sanity check on who is locking.
+ */
+static int _db_locked = 0;
+
+/*
+ * db_lock
+ */
+int
+db_lock(clicon_handle h, int id)
+{
+    _db_locked = id;
+    clicon_debug(1, "%s: lock db by %u",  __FUNCTION__, id);
+    return 0;
+}
+
+/*
+ * db_unlock
+ */
+int
+db_unlock(clicon_handle h)
+{
+    if (!_db_locked )
+	return 0;
+    _db_locked = 0;
+    return 0;
+}
+
+/*
+ * db_islocked
+ * returns id of locker
+ */
+int
+db_islocked(clicon_handle h)
+{
+    return _db_locked;
+}
+