--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/linux/native/libnio/fs/LinuxNativeDispatcher.c	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,232 @@
+/*
+ * Copyright (c) 2008, 2012, 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 "jni.h"
+#include "jni_util.h"
+#include "jvm.h"
+#include "jlong.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <dlfcn.h>
+#include <errno.h>
+#include <mntent.h>
+
+#include "sun_nio_fs_LinuxNativeDispatcher.h"
+
+typedef size_t fgetxattr_func(int fd, const char* name, void* value, size_t size);
+typedef int fsetxattr_func(int fd, const char* name, void* value, size_t size, int flags);
+typedef int fremovexattr_func(int fd, const char* name);
+typedef int flistxattr_func(int fd, char* list, size_t size);
+
+fgetxattr_func* my_fgetxattr_func = NULL;
+fsetxattr_func* my_fsetxattr_func = NULL;
+fremovexattr_func* my_fremovexattr_func = NULL;
+flistxattr_func* my_flistxattr_func = NULL;
+
+static jfieldID entry_name;
+static jfieldID entry_dir;
+static jfieldID entry_fstype;
+static jfieldID entry_options;
+
+static void throwUnixException(JNIEnv* env, int errnum) {
+    jobject x = JNU_NewObjectByName(env, "sun/nio/fs/UnixException",
+        "(I)V", errnum);
+    if (x != NULL) {
+        (*env)->Throw(env, x);
+    }
+}
+
+JNIEXPORT void JNICALL
+Java_sun_nio_fs_LinuxNativeDispatcher_init(JNIEnv *env, jclass clazz)
+{
+    my_fgetxattr_func = (fgetxattr_func*)dlsym(RTLD_DEFAULT, "fgetxattr");
+    my_fsetxattr_func = (fsetxattr_func*)dlsym(RTLD_DEFAULT, "fsetxattr");
+    my_fremovexattr_func = (fremovexattr_func*)dlsym(RTLD_DEFAULT, "fremovexattr");
+    my_flistxattr_func = (flistxattr_func*)dlsym(RTLD_DEFAULT, "flistxattr");
+
+    clazz = (*env)->FindClass(env, "sun/nio/fs/UnixMountEntry");
+    CHECK_NULL(clazz);
+    entry_name = (*env)->GetFieldID(env, clazz, "name", "[B");
+    CHECK_NULL(entry_name);
+    entry_dir = (*env)->GetFieldID(env, clazz, "dir", "[B");
+    CHECK_NULL(entry_dir);
+    entry_fstype = (*env)->GetFieldID(env, clazz, "fstype", "[B");
+    CHECK_NULL(entry_fstype);
+    entry_options = (*env)->GetFieldID(env, clazz, "opts", "[B");
+    CHECK_NULL(entry_options);
+}
+
+JNIEXPORT jint JNICALL
+Java_sun_nio_fs_LinuxNativeDispatcher_fgetxattr0(JNIEnv* env, jclass clazz,
+    jint fd, jlong nameAddress, jlong valueAddress, jint valueLen)
+{
+    size_t res = -1;
+    const char* name = jlong_to_ptr(nameAddress);
+    void* value = jlong_to_ptr(valueAddress);
+
+    if (my_fgetxattr_func == NULL) {
+        errno = ENOTSUP;
+    } else {
+        /* EINTR not documented */
+        res = (*my_fgetxattr_func)(fd, name, value, valueLen);
+    }
+    if (res == (size_t)-1)
+        throwUnixException(env, errno);
+    return (jint)res;
+}
+
+JNIEXPORT void JNICALL
+Java_sun_nio_fs_LinuxNativeDispatcher_fsetxattr0(JNIEnv* env, jclass clazz,
+    jint fd, jlong nameAddress, jlong valueAddress, jint valueLen)
+{
+    int res = -1;
+    const char* name = jlong_to_ptr(nameAddress);
+    void* value = jlong_to_ptr(valueAddress);
+
+    if (my_fsetxattr_func == NULL) {
+        errno = ENOTSUP;
+    } else {
+        /* EINTR not documented */
+        res = (*my_fsetxattr_func)(fd, name, value, valueLen, 0);
+    }
+    if (res == -1)
+        throwUnixException(env, errno);
+}
+
+JNIEXPORT void JNICALL
+Java_sun_nio_fs_LinuxNativeDispatcher_fremovexattr0(JNIEnv* env, jclass clazz,
+    jint fd, jlong nameAddress)
+{
+    int res = -1;
+    const char* name = jlong_to_ptr(nameAddress);
+
+    if (my_fremovexattr_func == NULL) {
+        errno = ENOTSUP;
+    } else {
+        /* EINTR not documented */
+        res = (*my_fremovexattr_func)(fd, name);
+    }
+    if (res == -1)
+        throwUnixException(env, errno);
+}
+
+JNIEXPORT jint JNICALL
+Java_sun_nio_fs_LinuxNativeDispatcher_flistxattr(JNIEnv* env, jclass clazz,
+    jint fd, jlong listAddress, jint size)
+{
+    size_t res = -1;
+    char* list = jlong_to_ptr(listAddress);
+
+    if (my_flistxattr_func == NULL) {
+        errno = ENOTSUP;
+    } else {
+        /* EINTR not documented */
+        res = (*my_flistxattr_func)(fd, list, (size_t)size);
+    }
+    if (res == (size_t)-1)
+        throwUnixException(env, errno);
+    return (jint)res;
+}
+
+JNIEXPORT jlong JNICALL
+Java_sun_nio_fs_LinuxNativeDispatcher_setmntent0(JNIEnv* env, jclass this, jlong pathAddress,
+                                                 jlong modeAddress)
+{
+    FILE* fp = NULL;
+    const char* path = (const char*)jlong_to_ptr(pathAddress);
+    const char* mode = (const char*)jlong_to_ptr(modeAddress);
+
+    do {
+        fp = setmntent(path, mode);
+    } while (fp == NULL && errno == EINTR);
+    if (fp == NULL) {
+        throwUnixException(env, errno);
+    }
+    return ptr_to_jlong(fp);
+}
+
+JNIEXPORT jint JNICALL
+Java_sun_nio_fs_LinuxNativeDispatcher_getmntent(JNIEnv* env, jclass this,
+    jlong value, jobject entry)
+{
+    struct mntent ent;
+    char buf[1024];
+    int buflen = sizeof(buf);
+    struct mntent* m;
+    FILE* fp = jlong_to_ptr(value);
+    jsize len;
+    jbyteArray bytes;
+    char* name;
+    char* dir;
+    char* fstype;
+    char* options;
+
+    m = getmntent_r(fp, &ent, (char*)&buf, buflen);
+    if (m == NULL)
+        return -1;
+    name = m->mnt_fsname;
+    dir = m->mnt_dir;
+    fstype = m->mnt_type;
+    options = m->mnt_opts;
+
+    len = strlen(name);
+    bytes = (*env)->NewByteArray(env, len);
+    if (bytes == NULL)
+        return -1;
+    (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)name);
+    (*env)->SetObjectField(env, entry, entry_name, bytes);
+
+    len = strlen(dir);
+    bytes = (*env)->NewByteArray(env, len);
+    if (bytes == NULL)
+        return -1;
+    (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)dir);
+    (*env)->SetObjectField(env, entry, entry_dir, bytes);
+
+    len = strlen(fstype);
+    bytes = (*env)->NewByteArray(env, len);
+    if (bytes == NULL)
+        return -1;
+    (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)fstype);
+    (*env)->SetObjectField(env, entry, entry_fstype, bytes);
+
+    len = strlen(options);
+    bytes = (*env)->NewByteArray(env, len);
+    if (bytes == NULL)
+        return -1;
+    (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)options);
+    (*env)->SetObjectField(env, entry, entry_options, bytes);
+
+    return 0;
+}
+
+JNIEXPORT void JNICALL
+Java_sun_nio_fs_LinuxNativeDispatcher_endmntent(JNIEnv* env, jclass this, jlong stream)
+{
+    FILE* fp = jlong_to_ptr(stream);
+    /* FIXME - man page doesn't explain how errors are returned */
+    endmntent(fp);
+}