--- /dev/null
+++ Libc/Libc-391.4.2/sys/sem_open.c
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 1999 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@
+ */
+
+#ifdef __APPLE_PR3375657_HACK__
+
+#include <stdio.h>
+#include <semaphore.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <alloca.h>
+#include <stdarg.h>
+#include <string.h>
+
+__private_extern__ int _sem_match(const char *name);
+
+sem_t *
+sem_open (const char *name, int flags, ...)
+{
+        char            *buffer;
+	va_list		ap;
+	int		mode;
+	unsigned int	value;
+
+        /*
+        * To work-around applications that don't play
+        * well in multiple GUI sessions, we append
+        * shared memory names with the effective user ID.
+        * It would be better to append the region name
+        * with a session ID, but nothing like that
+        * exists at this level of the system yet.
+        */
+
+        if (_sem_match(name) && (buffer = alloca(strlen(name) + 32)) != NULL) {
+                sprintf(buffer, "%s\t%d", name, geteuid());
+		name = buffer;
+        }
+
+// sem_open (const char *name, int flags, mode_t mode, unsigned int value)
+	va_start(ap, flags);
+	mode = va_arg(ap, int); /* promoted from mode_t to int */
+	value = va_arg(ap, unsigned int);
+	va_end(ap);
+
+	return syscall (SYS_sem_open, name, flags, mode, value);
+}
+
+#endif /* __APPLE_PR3375657_HACK__ */