android.system.Os类的使用及代码示例

x33g5p2x  于2022-01-26 转载在 其他  
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本文整理了Java中android.system.Os类的一些代码示例，展示了Os类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Os类的具体详情如下：
包路径：android.system.Os
类名称：Os

Os介绍

暂无

代码示例

代码示例来源：origin: android-hacker/VirtualXposed

Os.fsync(mTarget);
write(mServer, temp, 0, MSG_LENGTH);
Os.fsync(mTarget);
Os.close(mTarget);
mClosed = true;
write(mServer, temp, 0, MSG_LENGTH);

代码示例来源：origin: android-hacker/VirtualXposed

/**
 * @param path
 * @param mode {@link FileMode}
 * @throws Exception
 */
public static void chmod(String path, int mode) throws Exception {
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    try {
      Os.chmod(path, mode);
      return;
    } catch (Exception e) {
      // ignore
    }
  }
  File file = new File(path);
  String cmd = "chmod ";
  if (file.isDirectory()) {
    cmd += " -R ";
  }
  String cmode = String.format("%o", mode);
  Runtime.getRuntime().exec(cmd + cmode + " " + path).waitFor();
}

代码示例来源：origin: android-hacker/VirtualXposed

final FileDescriptor targetFd = Os.open(target.getAbsolutePath(),
    O_CREAT | O_WRONLY, 0644);
  Os.posix_fallocate(targetFd, 0, lengthBytes);
  Os.lseek(targetFd, offsetBytes, OsConstants.SEEK_SET);

代码示例来源：origin: koral--/android-gif-drawable

@RequiresApi(Build.VERSION_CODES.LOLLIPOP)
private static int getNativeFileDescriptor(FileDescriptor fileDescriptor, boolean closeOriginalDescriptor) throws GifIOException, ErrnoException {
  try {
    final int nativeFileDescriptor = createTempNativeFileDescriptor();
    Os.dup2(fileDescriptor, nativeFileDescriptor);
    return nativeFileDescriptor;
  } finally {
    if (closeOriginalDescriptor) {
      Os.close(fileDescriptor);
    }
  }
}

代码示例来源：origin: termux/termux-app

Os.chmod(targetFile.getAbsolutePath(), 0700);
  throw new RuntimeException("No SYMLINKS.txt encountered");
for (Pair<String, String> symlink : symlinks) {
  Os.symlink(symlink.first, symlink.second);

代码示例来源：origin: android-hacker/VirtualXposed

public static void closeQuietly(FileDescriptor fd) {
  if (fd != null && fd.valid()) {
    try {
      Os.close(fd);
    } catch (ErrnoException e) {
      e.printStackTrace();
    }
  }
}

代码示例来源：origin: android-hacker/VirtualXposed

public static void createSymlink(String oldPath, String newPath) throws Exception {
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    Os.symlink(oldPath, newPath);
  } else {
    Runtime.getRuntime().exec("ln -s " + oldPath + " " + newPath).waitFor();
  }
}

代码示例来源：origin: iTXTech/Daedalus

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public void process() {
  try {
    FileDescriptor[] pipes = Os.pipe();
    mInterruptFd = pipes[0];
    mBlockFd = pipes[1];
      polls[0] = deviceFd;
      polls[1] = blockFd;
      Os.poll(polls, 100);
      if (blockFd.revents != 0) {
        Log.i(TAG, "Told to stop VPN");

代码示例来源：origin: julian-klode/dns66

/**
 * Wrapper around {@link Os#poll(StructPollfd[], int)} that automatically restarts on EINTR
 * While post-Lollipop devices handle that themselves, we need to do this for Lollipop.
 *
 * @param fds     Descriptors and events to wait on
 * @param timeout Timeout. Should be -1 for infinite, as we do not lower the timeout when
 *                retrying due to an interrupt
 * @return The number of fds that have events
 * @throws ErrnoException See {@link Os#poll(StructPollfd[], int)}
 */
public static int poll(StructPollfd[] fds, int timeout) throws ErrnoException, InterruptedException {
  while (true) {
    if (Thread.interrupted())
      throw new InterruptedException();
    try {
      return Os.poll(fds, timeout);
    } catch (ErrnoException e) {
      if (e.errno == OsConstants.EINTR)
        continue;
      throw e;
    }
  }
}

代码示例来源：origin: lingochamp/okdownload

@Override
public void setLength(long newLength) {
  final String tag = "DownloadUriOutputStream";
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    try {
      Os.posix_fallocate(pdf.getFileDescriptor(), 0, newLength);
    } catch (Throwable e) {
      if (e instanceof ErrnoException) {
        if (((ErrnoException) e).errno == OsConstants.ENOSYS
            || ((ErrnoException) e).errno == OsConstants.ENOTSUP) {
          Util.w(tag, "fallocate() not supported; falling back to ftruncate()");
          try {
            Os.ftruncate(pdf.getFileDescriptor(), newLength);
          } catch (Throwable e1) {
            Util.w(tag, "It can't pre-allocate length(" + newLength + ") on the sdk"
                + " version(" + Build.VERSION.SDK_INT + "), because of " + e1);
          }
         }
      } else {
        Util.w(tag, "It can't pre-allocate length(" + newLength + ") on the sdk"
            + " version(" + Build.VERSION.SDK_INT + "), because of " + e);
      }
    }
  } else {
    Util.w(tag,
        "It can't pre-allocate length(" + newLength + ") on the sdk "
            + "version(" + Build.VERSION.SDK_INT + ")");
  }
}

代码示例来源：origin: android-hacker/VirtualXposed

public FileBridge() {
  try {
    Os.socketpair(AF_UNIX, SOCK_STREAM, 0, mServer, mClient);
  } catch (ErrnoException e) {
    throw new RuntimeException("Failed to create bridge");
  }
}

代码示例来源：origin: android-hacker/VirtualXposed

private ParcelFileDescriptor openReadInternal(String name) throws IOException {
  assertPreparedAndNotSealed("openRead");
  try {
    if (!FileUtils.isValidExtFilename(name)) {
      throw new IllegalArgumentException("Invalid name: " + name);
    }
    final File target = new File(resolveStageDir(), name);
    final FileDescriptor targetFd = Os.open(target.getAbsolutePath(), O_RDONLY, 0);
    return ParcelFileDescriptor.dup(targetFd);
  } catch (ErrnoException e) {
    throw new IOException(e);
  }
}

代码示例来源：origin: android-hacker/VirtualXposed

/**
 * java.io thinks that a read at EOF is an error and should return -1, contrary to traditional
 * Unix practice where you'd read until you got 0 bytes (and any future read would return -1).
 */
public static int read(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount) throws IOException {
  ArrayUtils.checkOffsetAndCount(bytes.length, byteOffset, byteCount);
  if (byteCount == 0) {
    return 0;
  }
  try {
    int readCount = Os.read(fd, bytes, byteOffset, byteCount);
    if (readCount == 0) {
      return -1;
    }
    return readCount;
  } catch (ErrnoException errnoException) {
    if (errnoException.errno == OsConstants.EAGAIN) {
      // We return 0 rather than throw if we try to read from an empty non-blocking pipe.
      return 0;
    }
    throw new IOException(errnoException);
  }
}

代码示例来源：origin: julian-klode/dns66

public static FileDescriptor closeOrWarn(FileDescriptor fd, String tag, String message) {
  try {
    if (fd != null)
      Os.close(fd);
  } catch (ErrnoException e) {
    Log.e(tag, "closeOrWarn: " + message, e);
  } finally {
    return null;
  }
}

代码示例来源：origin: termux/termux-app

Os.symlink(sharedDir.getAbsolutePath(), new File(storageDir, "shared").getAbsolutePath());
Os.symlink(downloadsDir.getAbsolutePath(), new File(storageDir, "downloads").getAbsolutePath());
Os.symlink(dcimDir.getAbsolutePath(), new File(storageDir, "dcim").getAbsolutePath());
Os.symlink(picturesDir.getAbsolutePath(), new File(storageDir, "pictures").getAbsolutePath());
Os.symlink(musicDir.getAbsolutePath(), new File(storageDir, "music").getAbsolutePath());
Os.symlink(moviesDir.getAbsolutePath(), new File(storageDir, "movies").getAbsolutePath());
    if (dir == null) continue;
    String symlinkName = "external-" + i;
    Os.symlink(dir.getAbsolutePath(), new File(storageDir, symlinkName).getAbsolutePath());

代码示例来源：origin: iTXTech/Daedalus

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public void process() {
  try {
    FileDescriptor[] pipes = Os.pipe();
    mInterruptFd = pipes[0];
    mBlockFd = pipes[1];
      Os.poll(polls, -1);
      if (blockFd.revents != 0) {
        Log.i(TAG, "Told to stop VPN");

代码示例来源：origin: julian-klode/dns66

@Test
@PrepareForTest({Log.class, Os.class})
public void testPoll_success() throws Exception {
  mockStatic(Log.class);
  mockStatic(Os.class);
  when(Os.poll(any(StructPollfd[].class), anyInt())).then(new CountingAnswer(42));
  assertEquals(42, FileHelper.poll(null, 0));
  assertEquals(1, testResult);
}

代码示例来源：origin: darkskygit/VirtualApp

public FileBridge() {
  try {
    Os.socketpair(AF_UNIX, SOCK_STREAM, 0, mServer, mClient);
  } catch (ErrnoException e) {
    throw new RuntimeException("Failed to create bridge");
  }
}

代码示例来源：origin: bzsome/VirtualApp-x326

private ParcelFileDescriptor openReadInternal(String name) throws IOException {
  assertPreparedAndNotSealed("openRead");
  try {
    if (!FileUtils.isValidExtFilename(name)) {
      throw new IllegalArgumentException("Invalid name: " + name);
    }
    final File target = new File(resolveStageDir(), name);
    final FileDescriptor targetFd = Os.open(target.getAbsolutePath(), O_RDONLY, 0);
    return ParcelFileDescriptor.dup(targetFd);
  } catch (ErrnoException e) {
    throw new IOException(e);
  }
}

代码示例来源：origin: bzsome/VirtualApp-x326

/**
 * java.io thinks that a read at EOF is an error and should return -1, contrary to traditional
 * Unix practice where you'd read until you got 0 bytes (and any future read would return -1).
 */
public static int read(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount) throws IOException {
  ArrayUtils.checkOffsetAndCount(bytes.length, byteOffset, byteCount);
  if (byteCount == 0) {
    return 0;
  }
  try {
    int readCount = Os.read(fd, bytes, byteOffset, byteCount);
    if (readCount == 0) {
      return -1;
    }
    return readCount;
  } catch (ErrnoException errnoException) {
    if (errnoException.errno == OsConstants.EAGAIN) {
      // We return 0 rather than throw if we try to read from an empty non-blocking pipe.
      return 0;
    }
    throw new IOException(errnoException);
  }
}

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