--- /dev/null
+/*
+ * Copyright (c) 2010 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * "Portions Copyright (c) 2004 Apple Computer, Inc. All Rights
+ * Reserved. This file contains Original Code and/or Modifications of
+ * Original Code as defined in and that are subject to the Apple Public
+ * Source License Version 1.0 (the 'License'). You may not use this file
+ * except in compliance with the License. Please obtain a copy of the
+ * License at http://www.apple.com/publicsource and read it before using
+ * this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
+ * License for the specific language governing rights and limitations
+ * under the License."
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+/*
+ * Thread-aware utmpx SPI
+ */
+#ifndef _UTMPX_THREAD_H_
+#define _UTMPX_THREAD_H_
+
+#include <utmpx.h>
+
+struct _utmpx; /* forward reference */
+typedef struct _utmpx *utmpx_t;
+
+__BEGIN_DECLS
+int _closeutx(utmpx_t);
+void _endutxent(utmpx_t);
+struct utmpx *_getutxent(utmpx_t);
+struct utmpx *_getutxid(utmpx_t, const struct utmpx *);
+struct utmpx *_getutxline(utmpx_t, const struct utmpx *);
+utmpx_t _openutx(const char *);
+struct utmpx *_pututxline(utmpx_t, const struct utmpx *);
+void _setutxent(utmpx_t);
+int _utmpxname(utmpx_t, const char *);
+__END_DECLS
+
+#endif /* !_UTMPX_THREAD_H_ */