src/java.base/macosx/native/libnio/fs/BsdNativeDispatcher.c

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2008, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2008, 2019, 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

@@ -201,5 +201,26 @@
     if (iter != NULL) {
         free(iter->buf);
         free(iter);
     }
 }
+
+JNIEXPORT jbyteArray JNICALL
+Java_sun_nio_fs_BsdNativeDispatcher_getmntonname0(JNIEnv *env, jclass this,
+    jlong pathAddress)
+{
+    struct statfs buf;
+    const char* path = (const char*)jlong_to_ptr(pathAddress);
+
+    if (statfs(path, &buf) != 0) {
+        throwUnixException(env, errno);
+    }
+
+    jsize len = strlen(buf.f_mntonname);
+    jbyteArray mntonname = (*env)->NewByteArray(env, len);
+    if (mntonname != NULL) {
+        (*env)->SetByteArrayRegion(env, mntonname, 0, len,
+            (jbyte*)buf.f_mntonname);
+    }
+
+    return mntonname;
+}