1 /* 2 * Copyright (c) 2019, 2020, 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 == "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 }