diff --git a/libc/bionic/open.cpp b/libc/bionic/open.cpp
new file mode 100644
index 0000000..e0dd181
--- /dev/null
+++ b/libc/bionic/open.cpp
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2008 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ */
+
+#include <fcntl.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "private/libc_logging.h"
+
+extern "C" int __openat(int, const char*, int, int);
+
+int open(const char* pathname, int flags, ...) {
+  mode_t mode = 0;
+
+  flags |= O_LARGEFILE;
+
+  if (flags & O_CREAT) {
+    va_list args;
+    va_start(args, flags);
+    mode = (mode_t) va_arg(args, int);
+    va_end(args);
+  }
+
+  return __openat(AT_FDCWD, pathname, flags, mode);
+}
+
+int __open_2(const char* pathname, int flags) {
+  if (__predict_false(flags & O_CREAT)) {
+    __fortify_chk_fail("open(O_CREAT): called without specifying a mode", 0);
+  }
+
+  flags |= O_LARGEFILE;
+
+  return __openat(AT_FDCWD, pathname, flags, 0);
+}
+
+int openat(int fd, const char *pathname, int flags, ...) {
+  mode_t mode = 0;
+
+  flags |= O_LARGEFILE;
+
+  if (flags & O_CREAT) {
+    va_list args;
+    va_start(args, flags);
+    mode = (mode_t) va_arg(args, int);
+    va_end(args);
+  }
+
+  return __openat(fd, pathname, flags, mode);
+}
+
+int __openat_2(int fd, const char* pathname, int flags) {
+  if (flags & O_CREAT) {
+    __fortify_chk_fail("openat(O_CREAT): called without specifying a mode", 0);
+  }
+
+  flags |= O_LARGEFILE;
+
+  return __openat(fd, pathname, flags, 0);
+}