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+/* $OpenBSD: un.h,v 1.14 2015/07/18 15:00:01 guenther Exp $ */
+/* $NetBSD: un.h,v 1.11 1996/02/04 02:12:47 christos Exp $ */
+
+/*
+ * Copyright (c) 1982, 1986, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ * 3. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ *
+ * @(#)un.h 8.1 (Berkeley) 6/2/93
+ */
+
+#ifndef _SYS_UN_H_
+#define _SYS_UN_H_
+
+#include <sys/cdefs.h>
+#include <sys/_types.h>
+
+#ifndef _SA_FAMILY_T_DEFINED_
+#define _SA_FAMILY_T_DEFINED_
+typedef __sa_family_t sa_family_t; /* sockaddr address family type */
+#endif
+
+/*
+ * Definitions for UNIX IPC domain.
+ */
+struct sockaddr_un {
+ unsigned char sun_len; /* sockaddr len excluding NUL */
+ sa_family_t sun_family; /* AF_UNIX */
+ char sun_path[104]; /* path name (gag) */
+};
+
+#ifndef _KERNEL
+#if __BSD_VISIBLE
+
+/* actual length of an initialized sockaddr_un */
+#define SUN_LEN(su) \
+ (sizeof(*(su)) - sizeof((su)->sun_path) + strlen((su)->sun_path))
+
+#endif /* __BSD_VISIBLE */
+
+#endif /* _KERNEL */
+#endif /* !_SYS_UN_H_ */