Java Files.setPosixFilePermissions方法代碼示例

import java.nio.file.Files; //導入方法依賴的package包/類
public static void setAsExecutable(String filePath) throws IOException {
	
	//using PosixFilePermission to set file permissions 755
       Set<PosixFilePermission> perms = new HashSet<PosixFilePermission>();
       //add owners permission
       perms.add(PosixFilePermission.OWNER_READ);
       perms.add(PosixFilePermission.OWNER_WRITE);
       perms.add(PosixFilePermission.OWNER_EXECUTE);
       //add group permissions
       perms.add(PosixFilePermission.GROUP_READ);
       perms.add(PosixFilePermission.GROUP_EXECUTE);
       //add others permissions
       perms.add(PosixFilePermission.OTHERS_READ);
       perms.add(PosixFilePermission.OTHERS_EXECUTE);
       
       Files.setPosixFilePermissions(Paths.get(filePath), perms);
       logger.info("Modified as executable " + filePath);
	
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
/**
 * 設置文件權限。前提：必須支持PosixFileAttributeView.
 */
public static void setFilePerm(File file, String perm) {
  if (filePermSupported()) {
    try {
      Set<PosixFilePermission> perms = PosixFilePermissions.fromString(perm);
      PosixFileAttributes attr = Files.readAttributes(file.toPath(), PosixFileAttributes.class);
      attr.permissions().clear();
      Files.setPosixFilePermissions(file.toPath(), perms);
    } catch (IOException e) {
      throw new IllegalStateException(e);
    }
  }
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
@Override
public void setFilePermissions(
                                String sourceFile,
                                String permissions ) {

    sourceFile = IoUtils.normalizeFilePath(sourceFile, osType);
    File file = new File(sourceFile);

    checkFileExistence(file);
    checkAttributeOsSupport(FileAttributes.PERMISSIONS);

    try {
        Files.setPosixFilePermissions(new File(sourceFile).getCanonicalFile().toPath(),
                                      getPosixFilePermission(Integer.parseInt(permissions, 8)));
    } catch (IOException ioe) {
        throw new FileSystemOperationException("Could not update permissions for file '" + sourceFile
                                               + "'", ioe);
    }
    log.info("Successfully set permissions of file '" + sourceFile + "' to " + permissions);
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
/**
 * Doesn't appear to work in docker, will never work in windows.
 * @throws IOException if any of the setup fails
 */
@Test
public void testBrokenEnvironment() throws IOException {
  File root = testFolder.newFolder();
  File workingDir = new File(root, FileStore.STANDARD.getPath() + File.separator);
  DefinitionModel model = new DefinitionModel(SIMPLE_MODEL);
  Files.createDirectories(workingDir.toPath(),
      PosixFilePermissions.asFileAttribute(PosixFilePermissions.fromString(NO_PERMS)));
  if (PosixFilePermissions.fromString(NO_PERMS).equals(Files.getPosixFilePermissions(workingDir.toPath()))) {
    TestFileStore fileStore = new TestFileStore(root);
    assertThatThrownBy(() -> fileStore.store(model)).isInstanceOf(IOException.class)
      .hasMessage("could not write directories for model storage");
    Files.setPosixFilePermissions(workingDir.toPath(), PosixFilePermissions.fromString("rwxrwxrwx"));
  }
  cleanUp(root);
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
/**
 * Doesn't appear to work in docker, will never work in windows.
 * @throws IOException if any of the setup fails
 */
@Test
public void failedStorage() throws IOException {
  File root = testFolder.newFolder();
  File workingDir = new File(root, FileStore.STANDARD.getPath() + File.separator);
  Files.createDirectories(workingDir.toPath(),
      PosixFilePermissions.asFileAttribute(PosixFilePermissions.fromString(NO_PERMS)));
  
  if (PosixFilePermissions.fromString(NO_PERMS).equals(Files.getPosixFilePermissions(workingDir.toPath()))) {
    DefinitionModel model1 = new DefinitionModel(SIMPLE_MODEL);
    TestErrorListener el = new TestErrorListener();

    TestFileStore fileStore = new TestFileStore(workingDir);
    ResourceLoader loader = new ClasspathUrlResourceLoader(workingDir);
    DefinitionModelStore store = new GsonDefinitionModelStore(loader, fileStore);
    Set<DefinitionModel> models = new HashSet<>();
    models.add(model1);
    new DefinitionContentInspector()
      .inspectDefinitionGraph(models, el, new ReflectionAssignabilityUtils(), store);
    assertThat(el.getErrors()).hasSize(1);
    assertThat(el.getErrors().get(0).getMessage()).isEqualTo(ErrorType.COULD_NOT_STORE);
    Files.setPosixFilePermissions(workingDir.toPath(), PosixFilePermissions.fromString("rwxrwxrwx"));
  }
  cleanUp(root);
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
@Test
public void testConvert() throws Exception {
    final LocalSession session = new LocalSession(new Host(new LocalProtocol(), new LocalProtocol().getDefaultHostname()));
    if(session.isPosixFilesystem()) {
        session.open(new DisabledHostKeyCallback(), new DisabledLoginCallback());
        session.login(new DisabledPasswordStore(), new DisabledLoginCallback(), new DisabledCancelCallback());
        final Path file = new Path(new LocalHomeFinderFeature(session).find(), UUID.randomUUID().toString(), EnumSet.of(Path.Type.file));
        new LocalTouchFeature(session).touch(file, new TransferStatus());
        final java.nio.file.Path local = session.toPath(file);
        final PosixFileAttributes posixAttributes = Files.readAttributes(local, PosixFileAttributes.class);
        final LocalAttributesFinderFeature finder = new LocalAttributesFinderFeature(session);
        assertEquals(PosixFilePermissions.toString(posixAttributes.permissions()), finder.find(file).getPermission().getSymbol());
        Files.setPosixFilePermissions(local, PosixFilePermissions.fromString("rw-------"));
        assertEquals("rw-------", finder.find(file).getPermission().getSymbol());
        Files.setPosixFilePermissions(local, PosixFilePermissions.fromString("rwxrwxrwx"));
        assertEquals("rwxrwxrwx", finder.find(file).getPermission().getSymbol());
        Files.setPosixFilePermissions(local, PosixFilePermissions.fromString("rw-rw----"));
        assertEquals("rw-rw----", finder.find(file).getPermission().getSymbol());
        assertEquals(posixAttributes.size(), finder.find(file).getSize());
        assertEquals(posixAttributes.lastModifiedTime().toMillis(), finder.find(file).getModificationDate());
        assertEquals(posixAttributes.creationTime().toMillis(), finder.find(file).getCreationDate());
        assertEquals(posixAttributes.lastAccessTime().toMillis(), finder.find(file).getAccessedDate());
        new LocalDeleteFeature(session).delete(Collections.singletonList(file), new DisabledLoginCallback(), new Delete.DisabledCallback());
    }
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
private static void makeFileNonReadable(String file) throws IOException {
    Path filePath = Paths.get(file);
    Set<String> supportedAttr = filePath.getFileSystem().supportedFileAttributeViews();

    if (supportedAttr.contains("posix")) {
        Files.setPosixFilePermissions(filePath, PosixFilePermissions.fromString("-w--w----"));
    } else if (supportedAttr.contains("acl")) {
        UserPrincipal fileOwner = Files.getOwner(filePath);

        AclFileAttributeView view = Files.getFileAttributeView(filePath, AclFileAttributeView.class);

        AclEntry entry = AclEntry.newBuilder()
                .setType(AclEntryType.DENY)
                .setPrincipal(fileOwner)
                .setPermissions(AclEntryPermission.READ_DATA)
                .build();

        List<AclEntry> acl = view.getAcl();
        acl.add(0, entry);
        view.setAcl(acl);
    }
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
public void fixPermissions() throws IOException {
    try {
        Set<PosixFilePermission> filePermissions = Files.getPosixFilePermissions(executable);
        Stream<PosixFilePermission> requiredPermissions = Stream
            .of(PosixFilePermission.OWNER_EXECUTE, PosixFilePermission.GROUP_EXECUTE);

        requiredPermissions.forEach(requiredPermission -> {
            filePermissions.add(requiredPermission);
        });
        Files.setPosixFilePermissions(executable, filePermissions);
    } catch (UnsupportedOperationException e) {
        // windows -.-
    }
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
@Override
public void flush() throws IOException {
  super.flush();
  if (!Shell.WINDOWS) {
    Files.setPosixFilePermissions(Paths.get(file.getCanonicalPath()),
        permissions);
  } else {
    // FsPermission expects a 10-character string because of the leading
    // directory indicator, i.e. "drwx------". The JDK toString method returns
    // a 9-character string, so prepend a leading character.
    FsPermission fsPermission = FsPermission.valueOf(
        "-" + PosixFilePermissions.toString(permissions));
    FileUtil.setPermission(file, fsPermission);
  }
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
private static String[] getLauncher() throws IOException {
    String platform = getPlatform();
    if (platform == null) {
        return null;
    }

    String launcher = TEST_SRC + File.separator + platform + "-" + ARCH +
                      File.separator + "launcher";

    final FileSystem FS = FileSystems.getDefault();
    Path launcherPath = FS.getPath(launcher);

    final boolean hasLauncher = Files.isRegularFile(launcherPath, LinkOption.NOFOLLOW_LINKS)&&
                                Files.isReadable(launcherPath);
    if (!hasLauncher) {
        System.out.println("Launcher [" + launcher + "] does not exist. Skipping the test.");
        return null;
    }

    // It is impossible to store an executable file in the source control
    // We need to copy the launcher to the working directory
    // and set the executable flag
    Path localLauncherPath = FS.getPath(WORK_DIR, "launcher");
    Files.copy(launcherPath, localLauncherPath,
               StandardCopyOption.REPLACE_EXISTING,
               StandardCopyOption.COPY_ATTRIBUTES);
    if (!Files.isExecutable(localLauncherPath)) {
        Set<PosixFilePermission> perms = new HashSet<>(
            Files.getPosixFilePermissions(
                localLauncherPath,
                LinkOption.NOFOLLOW_LINKS
            )
        );
        perms.add(PosixFilePermission.OWNER_EXECUTE);
        Files.setPosixFilePermissions(localLauncherPath, perms);
    }
    return new String[] {launcher, localLauncherPath.toAbsolutePath().toString()};
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
/**
 * Test 1 - SSL config file is secure - VM should start
 */
private void test1() throws Exception {
    final Set<PosixFilePermission> perms_0700 = new HashSet<>();
    perms_0700.add(PosixFilePermission.OWNER_WRITE);
    perms_0700.add(PosixFilePermission.OWNER_READ);
    perms_0700.add(PosixFilePermission.OWNER_EXECUTE);
    Files.setPosixFilePermissions(file2PermissionTest, perms_0700);

    if (doTest() != 0) {
        ++failures;
    }
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
private static void makeMine(Path p) throws IOException {
    // chmod to owner-rw only, otherwise MIT krb5 rejects
    try {
        Set<PosixFilePermission> attrs = new HashSet<>();
        attrs.add(PosixFilePermission.OWNER_READ);
        attrs.add(PosixFilePermission.OWNER_WRITE);
        Files.setPosixFilePermissions(p, attrs);
    } catch (UnsupportedOperationException uoe) {
        // No POSIX permission. That's OK.
    }
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
/**
 * Create the given directory if it does not exist, otherwise expect
 * it to be writable.
 *
 * @param dir The {@code File} specifying the required directory.
 * @return The required directory, or null on failure.
 */
private static File requireDirectory(File dir) {
    if (dir.exists()) {
        if (dir.isDirectory() && dir.canWrite()) return dir;
    } else {
        if (dir.mkdir()) {
            try {
                Files.setPosixFilePermissions(dir.toPath(), mode0700);
            } catch (IOException ioe) { /* ignore */ }
            return dir;
        }
    }
    return null;
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
private static String[] getLauncher() throws IOException {
    String platform = getPlatform();
    if (platform == null) {
        return null;
    }

    String launcher = TEST_SRC + File.separator + platform + "-" + ARCH +
                      File.separator + "launcher";

    final FileSystem FS = FileSystems.getDefault();
    Path launcherPath = FS.getPath(launcher);

    final boolean hasLauncher = Files.isRegularFile(launcherPath, LinkOption.NOFOLLOW_LINKS)&&
                                Files.isReadable(launcherPath);
    if (!hasLauncher) {
        System.out.println("Launcher [" + launcher + "] does not exist. Skipping the test.");
        return null;
    }

    // It is impossible to store an executable file in the source control
    // We need to copy the launcher to the working directory
    // and set the executable flag
    Path localLauncherPath = FS.getPath(WORK_DIR, "launcher");
    Files.copy(launcherPath, localLauncherPath,
               StandardCopyOption.REPLACE_EXISTING);
    if (!Files.isExecutable(localLauncherPath)) {
        Set<PosixFilePermission> perms = new HashSet<>(
            Files.getPosixFilePermissions(
                localLauncherPath,
                LinkOption.NOFOLLOW_LINKS
            )
        );
        perms.add(PosixFilePermission.OWNER_EXECUTE);
        Files.setPosixFilePermissions(localLauncherPath, perms);
    }
    return new String[] {launcher, localLauncherPath.toAbsolutePath().toString()};
}
 

import java.nio.file.Files; //導入方法依賴的package包/類
private void extractTar( String tarFilePath, String outputDirPath ) {

        TarArchiveEntry entry = null;
        try (TarArchiveInputStream tis = new TarArchiveInputStream(new FileInputStream(tarFilePath))) {
            while ( (entry = (TarArchiveEntry) tis.getNextEntry()) != null) {
                if (log.isDebugEnabled()) {
                    log.debug("Extracting " + entry.getName());
                }
                File entryDestination = new File(outputDirPath, entry.getName());
                if (entry.isDirectory()) {
                    entryDestination.mkdirs();
                } else {
                    entryDestination.getParentFile().mkdirs();
                    OutputStream out = new BufferedOutputStream(new FileOutputStream(entryDestination));
                    IoUtils.copyStream(tis, out, false, true);
                }
                if (OperatingSystemType.getCurrentOsType() != OperatingSystemType.WINDOWS) {//check if the OS is UNIX
                    // set file/dir permissions, after it is created
                    Files.setPosixFilePermissions(entryDestination.getCanonicalFile().toPath(),
                                                  getPosixFilePermission(entry.getMode()));
                }
            }
        } catch (Exception e) {
            String errorMsg = null;
            if (entry != null) {
                errorMsg = "Unable to untar " + entry.getName() + " from " + tarFilePath
                           + ".Target directory '" + outputDirPath + "' is in inconsistent state.";
            } else {
                errorMsg = "Could not read data from " + tarFilePath;
            }
            throw new FileSystemOperationException(errorMsg, e);
        }

    }