--- /dev/null
+++ Libc/Libc-320.1.3/threads/lu_utils.c
@@ -0,0 +1,134 @@
+/*
+ * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * 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 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+/*
+ * Port and memory management for doing lookups to the lookup server
+ * Copyright (C) 1989 by NeXT, Inc.
+ */
+/*
+ * HISTORY
+ * 27-Mar-90  Gregg Kellogg (gk) at NeXT
+ *	Changed to use bootstrap port instead of service port.
+ *
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <mach/mach.h>
+#include <mach/error.h>
+#include <servers/bootstrap.h>
+
+mach_port_t _lu_port = MACH_PORT_NULL;
+static name_t LOOKUP_NAME = "lookup daemon v2";
+
+mach_port_t _lookupd_port(mach_port_t port) {
+	if (port != MACH_PORT_NULL) {
+		kern_return_t ret;
+		mach_port_t bp;
+		ret = task_get_bootstrap_port(mach_task_self(), &bp);
+		if (ret != KERN_SUCCESS) {
+			mach_error("task_get_bootstrap_port() failed", ret);
+			abort();
+		}
+		if (bp == MACH_PORT_NULL) {
+			mach_error("task_get_bootstrap_port() returned MACH_PORT_NULL!", 0);
+			return MACH_PORT_NULL;
+		}
+		ret = bootstrap_register(bp, LOOKUP_NAME, port);
+		if (ret != BOOTSTRAP_SUCCESS) {
+			mach_error("bootstrap_register() failed", ret);
+			abort();
+		}
+                return port;
+	}
+	return _lu_port;
+}
+
+/* called as child starts up.  mach ports aren't inherited: trash cache */
+void
+_lu_fork_child()
+{
+	mach_port_t bp;
+	kern_return_t ret;
+	int pid = getpid();
+
+	_lu_port = MACH_PORT_NULL;
+	if (pid > 2) {
+		ret = task_get_bootstrap_port(mach_task_self(), &bp);
+		if (ret != KERN_SUCCESS) {
+			mach_error("task_get_bootstrap_port() failed", ret);
+			abort();
+		}
+		if (bp == MACH_PORT_NULL) {
+			fprintf(stderr, "task_get_bootstrap_port() returned MACH_PORT_NULL!\n");
+			return;
+		}
+		ret = bootstrap_look_up(bp, LOOKUP_NAME, &_lu_port);
+		if (ret != BOOTSTRAP_SUCCESS && ret != BOOTSTRAP_UNKNOWN_SERVICE) {
+			mach_error("bootstrap_look_up() failed", ret);
+			_lu_port = MACH_PORT_NULL;
+		}
+	}
+}
+
+void
+_lu_setport(mach_port_t desired)
+{
+	if (_lu_port != MACH_PORT_NULL) {
+		mach_port_deallocate(mach_task_self(), _lu_port);
+	}
+	_lu_port = desired;
+}
+
+static int
+port_valid(mach_port_t port)
+{
+	mach_port_type_t ptype;
+	kern_return_t ret;
+	
+	ret = mach_port_type(mach_task_self(), port, &ptype);
+	if (ret != KERN_SUCCESS) {
+		mach_error("mach_port_type() failed", ret);
+		return 0;
+	}
+	return 1;
+}
+
+int
+_lu_running(void)
+{
+	if (_lu_port == MACH_PORT_NULL) {
+		_lu_fork_child();
+	}
+	if (_lu_port != MACH_PORT_NULL) {
+		if (port_valid(_lu_port)) {
+			return (1);
+		}
+		_lu_fork_child();
+		if (port_valid(_lu_port)) {
+			return (1);
+		}
+	}
+	return 0;
+}
+