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diff --git a/ptunit/include/ptunit_mkfile.h b/ptunit/include/ptunit_mkfile.h
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+++ b/ptunit/include/ptunit_mkfile.h
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+/*
+ * Copyright (c) 2013-2018, Intel Corporation
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  * Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *  * Neither the name of Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef PTUNIT_MKFILE_H
+#define PTUNIT_MKFILE_H
+
+#include <stdio.h>
+
+
+/* Create a temporary file for unit testing.
+ *
+ * Creates a new file and opens it with @mode.  On success, provides the file
+ * struct and file name in @file and @filename respectively.
+ *
+ * The @file needs to be closed and the @filename needs to be freed after use.
+ *
+ * Returns zero on success, a negative error code otherwise.
+ * Returns -pte_internal if @file or @filename is NULL.
+ * Returns -pte_nomem if @filename can't be allocated.
+ */
+int ptunit_mkfile(FILE **file, char **filename, const char *mode);
+
+#endif /* PTUNIT_MKFILE_H */