1 /*

     2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /* @test

    25  * @bug 8181493 8231174

    26  * @summary Verify that nanosecond precision is maintained for file timestamps

    27  * @requires (os.family == "linux") | (os.family == "mac") | (os.family == "solaris") | (os.family == "windows")

    28  * @modules java.base/sun.nio.fs:+open

    29  */

    30 

    31 import java.io.IOException;

    32 import java.lang.reflect.Method;

    33 import java.nio.file.Files;

    34 import java.nio.file.FileStore;

    35 import java.nio.file.Path;

    36 import java.nio.file.attribute.BasicFileAttributes;

    37 import java.nio.file.attribute.BasicFileAttributeView;

    38 import java.nio.file.attribute.FileTime;

    39 import java.util.Set;

    40 import java.util.concurrent.TimeUnit;

    41 

    42 public class SetTimesNanos {

    43     private static final boolean IS_WINDOWS =

    44         System.getProperty("os.name").startsWith("Windows");

    45 

    46     public static void main(String[] args) throws Exception {

    47         if (!IS_WINDOWS) {

    48             // Check whether futimens() system call is supported

    49             Class unixNativeDispatcherClass =

    50                 Class.forName("sun.nio.fs.UnixNativeDispatcher");

    51             Method futimensSupported =

    52                 unixNativeDispatcherClass.getDeclaredMethod("futimensSupported");

    53             futimensSupported.setAccessible(true);

    54             if (!(boolean)futimensSupported.invoke(null)) {

    55                 System.err.println("futimens() not supported; skipping test");

    56                 return;

    57             }

    58         }

    59 

    60         Path dirPath = Path.of("test");

    61         Path dir = Files.createDirectory(dirPath);

    62         FileStore store = Files.getFileStore(dir);

    63         System.out.format("FileStore: \"%s\" on %s (%s)%n",

    64             dir, store.name(), store.type());

    65 

    66         Set<String> testedTypes = IS_WINDOWS ?

    67             Set.of("NTFS") : Set.of("apfs", "ext4", "xfs", "zfs");

    68         if (!testedTypes.contains(store.type())) {

    69             System.err.format("%s not in %s; skipping test", store.type(), testedTypes);

    70             return;

    71         }

    72 

    73         testNanos(dir);

    74 

    75         Path file = Files.createFile(dir.resolve("test.dat"));

    76         testNanos(file);

    77     }

    78 

    79     private static void testNanos(Path path) throws IOException {

    80         // Set modification and access times

    81         // Time stamp = "2017-01-01 01:01:01.123456789";

    82         long timeNanos = 1_483_261_261L*1_000_000_000L + 123_456_789L;

    83         FileTime pathTime = FileTime.from(timeNanos, TimeUnit.NANOSECONDS);

    84         BasicFileAttributeView view =

    85             Files.getFileAttributeView(path, BasicFileAttributeView.class);

    86         view.setTimes(pathTime, pathTime, null);

    87 

    88         // Windows file time resolution is 100ns so truncate

    89         if (IS_WINDOWS) {

    90             timeNanos = 100L*(timeNanos/100L);

    91         }

    92 

    93         // Read attributes

    94         BasicFileAttributes attrs =

    95             Files.readAttributes(path, BasicFileAttributes.class);

    96 

    97         // Check timestamps

    98         String[] timeNames = new String[] {"modification", "access"};

    99         FileTime[] times = new FileTime[] {attrs.lastModifiedTime(),

   100             attrs.lastAccessTime()};

   101         for (int i = 0; i < timeNames.length; i++) {

   102             long nanos = times[i].to(TimeUnit.NANOSECONDS);

   103             if (nanos != timeNanos) {

   104                 throw new RuntimeException("Expected " + timeNames[i] +

   105                     " timestamp to be '" + timeNanos + "', but was '" +

   106                     nanos + "'");

   107             }

   108         }

   109     }

   110 }