--- Libc/Libc-262/threads/cprocs.c
+++ Libc/Libc-391/threads/cprocs.c
@@ -3,19 +3,20 @@
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (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.
+ * 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.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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.
+ * 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@
  */
@@ -43,8 +44,8 @@
  * Implementation of cprocs (lightweight processes)
  * and primitive synchronization operations.
  */
+#include "pthread_internals.h"
 #include <stdlib.h>
-#include "pthread_internals.h"
 #include "cthreads.h"
 #include "cthread_internals.h"
 #include <mach/message.h>
@@ -60,8 +61,6 @@
  */
 extern mach_port_t mach_thread_self();
 extern boolean_t swtch_pri();
-
-private int cprocs_started = FALSE;
 
 #ifdef	CTHREADS_DEBUG
 private void
@@ -97,12 +96,11 @@
 	cthread_queue_map(queue, cproc_t, print_cproc);
 	printf("\n");
 }
-#endif	CTHREADS_DEBUG
+#endif	/* CTHREADS_DEBUG */
 
-private int cproc_lock = 0;		/* unlocked */
+#ifdef	CTHREADS_DEBUG
 private cproc_t cprocs = NO_CPROC;	/* linked list of cprocs */
 
-#ifdef	CTHREADS_DEBUG
 private void
 print_all_cprocs()
 {
@@ -113,13 +111,14 @@
 		print_cproc(p);
 	printf("\n");
 }
-#endif	CTHREADS_DEBUG
+#endif	/* CTHREADS_DEBUG */
 
 /*
  * Routines for supporting fork() of multi-threaded programs.
  */
 
-void _cproc_fork_child()
+void
+_cproc_fork_child()
 /*
  * Called in the child after a fork().  Resets cproc data structures to
  * coincide with the reality that we now have a single cproc and cthread.
@@ -137,15 +136,21 @@
 
 #undef errno
 extern int errno;
-void cthread_set_errno_self(error)
+extern int *__error(void);
+
+void
+cthread_set_errno_self(error)
 	int	error;
 {
-	pthread_t t;
+	int *ep = __error();
+	extern int __unix_conforming;
 
-	t = pthread_self();
-        if (t && (t->sig == _PTHREAD_SIG)) {
-            t->err_no = error;
-        }
+	if ((__unix_conforming) && (error == EINTR) && (__pthread_canceled(0) == 0))
+		pthread_exit(PTHREAD_CANCELED);
+
+        if (ep != &errno)
+            *ep = error;
+
         errno = error;
 }