--- Libc/Libc-391/threads/lu_utils.c
+++ Libc/Libc-320/threads/lu_utils.c
@@ -2,6 +2,8 @@
  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
+ * 
+ * Copyright (c) 1999-2003 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
@@ -42,21 +44,24 @@
 static name_t LOOKUP_NAME = "lookup daemon v2";
 
 mach_port_t _lookupd_port(mach_port_t port) {
-	kern_return_t ret;
-
 	if (port != MACH_PORT_NULL) {
-		ret = bootstrap_register(bootstrap_port, LOOKUP_NAME, port);
+		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;
-	} else if ((_lu_port == MACH_PORT_NULL) && (getpid() > 1)) {
-		ret = bootstrap_look_up(bootstrap_port, LOOKUP_NAME, &_lu_port);
-		if (ret != BOOTSTRAP_SUCCESS && ret != BOOTSTRAP_UNKNOWN_SERVICE) {
-			mach_error("bootstrap_look_up() failed", ret);
-			_lu_port = MACH_PORT_NULL;
-		}
 	}
 	return _lu_port;
 }
@@ -65,7 +70,27 @@
 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
@@ -77,9 +102,35 @@
 	_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)
 {
-	return ((_lu_port != MACH_PORT_NULL) ||
-		(_lookupd_port(MACH_PORT_NULL) != MACH_PORT_NULL));
+	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;
 }
+