--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/unix/native/libnio/ch/UnixAsynchronousSocketChannelImpl.c	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include "jni.h"
+#include "jni_util.h"
+#include "net_util.h"
+#include "jlong.h"
+#include "sun_nio_ch_UnixAsynchronousSocketChannelImpl.h"
+#include "nio_util.h"
+#include "nio.h"
+
+
+JNIEXPORT void JNICALL
+Java_sun_nio_ch_UnixAsynchronousSocketChannelImpl_checkConnect(JNIEnv *env,
+    jobject this, int fd)
+{
+    int error = 0;
+    socklen_t arglen = sizeof(error);
+    int result;
+
+    result = getsockopt(fd, SOL_SOCKET, SO_ERROR, &error, &arglen);
+    if (result < 0) {
+        JNU_ThrowIOExceptionWithLastError(env, "getsockopt");
+    } else {
+        if (error)
+            handleSocketError(env, error);
+    }
+}