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diff --git a/ioreplay/src/replay/replay.h b/ioreplay/src/replay/replay.h
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+++ b/ioreplay/src/replay/replay.h
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+// Copyright 2018 Mimecast Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef REPLAY_H
+#define REPLAY_H
+
+#include "../defaults.h"
+#include "../utils/futils.h"
+#include "../opcodes.h"
+#include "../options.h"
+#include "rioop.h"
+#include "rprocess.h"
+
+/**
+ * @brief Replays the given .replay file
+ *
+ * @param opts The options object
+ * @return SUCCESS if everything went fine
+ */
+status_e replay_run(options_s *opts);
+
+/**
+ * @brief Extract required meta data from .replay's meta header
+ *
+ * @param opts The options object
+ * @param replay_fd The file handle to the .replay file
+ * @param num_vsizes The amount of virtual sizes/paths
+ * @param num_pids The amount of process IDs
+ * @param num_fds The amount of virtual file descriptors
+ * @param num_lines The amount of .replay lines with I/O ops
+ */
+void replay_extract_header(options_s *opts, FILE *replay_fd, long *num_vsizes,
+                           long *num_pids, long *num_fds,long *num_lines);
+
+#endif // REPLAY_H