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diff --git a/src/ceph/src/global/pidfile.h b/src/ceph/src/global/pidfile.h
new file mode 100644
index 0000000..e7e2b0d
--- /dev/null
+++ b/src/ceph/src/global/pidfile.h
@@ -0,0 +1,28 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2011 New Dream Network
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#ifndef CEPH_COMMON_PIDFILE_H
+#define CEPH_COMMON_PIDFILE_H
+
+struct md_config_t;
+
+// Write a pidfile with the current pid, using the configuration in the
+// provided conf structure.
+int pidfile_write(const md_config_t *conf);
+
+// Remove the pid file that was previously written by pidfile_write.
+// This is safe to call in a signal handler context.
+void pidfile_remove();
+
+#endif