void constructor_invalidMode_throws() {
        SmbFile file = mock(SmbFile.class);
        assertThrows(IllegalArgumentException.class, () -> new SmbRandomAccessFile(file, "badmode"));
    }

    @Test
    @DisplayName("open(): acquires and releases handle (no I/O)")
    void open_acquiresAndReleasesHandle() throws Exception {

    setDefault(int.class, 32);
    setDefault(String.class, "abcd");
    setDefault(Method.class, AbstractPackageSanityTests.class.getDeclaredMethods()[0]);
    setDefault(MapMode.class, MapMode.READ_ONLY);
    setDefault(CharsetEncoder.class, UTF_8.newEncoder());
  }

   * @see FileChannel#map(MapMode, long, long)
   * @since 2.0
   */
  public static MappedByteBuffer map(File file, MapMode mode) throws IOException {
    return mapInternal(file, mode, -1);
  }

  /**
   * Maps a file in to memory as per {@link FileChannel#map(java.nio.channels.FileChannel.MapMode,
   * long, long)} using the requested {@link MapMode}.
   *

   * @see FileChannel#map(MapMode, long, long)
   * @since 2.0
   */
  public static MappedByteBuffer map(File file, MapMode mode) throws IOException {
    return mapInternal(file, mode, -1);
  }

  /**
   * Maps a file in to memory as per {@link FileChannel#map(java.nio.channels.FileChannel.MapMode,
   * long, long)} using the requested {@link MapMode}.
   *

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"os"
)

var (
	// No special option for reads on windows
	readMode = os.O_RDONLY

	// Write with sync no buffering only used only for `xl.meta` writes
	writeMode = os.O_SYNC

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.Channel;
import java.nio.channels.FileChannel;
import java.nio.channels.FileChannel.MapMode;

import org.codelibs.core.exception.IORuntimeException;

/**
 * Utility for {@link Channel}.
 *
 * Author: koichik
 */
public abstract class ChannelUtil {

    /**
     * Do not instantiate.

package cmd

import (
	"os"
	"syscall"
)

var (
	// Disallow updating access times
	// Add non-block to avoid syscall to attempt to set epoll on files.
	readMode = os.O_RDONLY | 0x40000 | syscall.O_NONBLOCK // O_NOATIME

	// Write with data sync only used only for `xl.meta` writes
	writeMode = 0x1000 | syscall.O_NONBLOCK // O_DSYNC

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel.MapMode;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Random;
import junit.framework.TestSuite;
import org.jspecify.annotations.NullUnmarked;

/**

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel.MapMode;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Random;
import junit.framework.TestSuite;
import org.jspecify.annotations.NullUnmarked;

/**

// the directory itself, if the dirPath doesn't exist this function doesn't return
// an error.
func readDirFn(dirPath string, fn func(name string, typ os.FileMode) error) error {
	fd, err := openFileWithFD(dirPath, readMode, 0o666)
	if err != nil {
		if osErrToFileErr(err) == errFileNotFound {
			return nil
		}
		if !osIsPermission(err) {
			return osErrToFileErr(err)
		}
		// There may be permission error when dirPath