Получение точки монтирования при подключении USB-устройства Mac OS X и Linux

Нет, нет. Под Linux вы можете использовать HAL или DeviceKit-диски с интерфейсами D-Bus. Обратите внимание, что это необязательные компоненты, которые могут отсутствовать. HAL старше, а DeviceKit-диски — более новые реализации, а DK-d заменяет HAL.

Подход, который я использовал для получения доступных точек монтирования (с Java), направляет вывод команды system_profiler SPUSBDataType -xml в dd-plist. Впоследствии он рекурсивно проходит по иерархии USB, сопоставляя те, у которых есть ключ «тома». Для каждого элемента в этом массиве извлеките ключ «mount_point», чтобы получить место, где он смонтирован. См. пример кода ниже:

/*
Copyright © 2014 Edwin de Jong. All Rights Reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

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3. The name of the author may not be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY [LICENSOR] "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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package nl.topicuszorg.laos.util.osx;

import java.io.IOException;
import java.io.InputStream;
import java.text.ParseException;
import java.util.List;
import java.util.Map;

import javax.xml.parsers.ParserConfigurationException;

import nl.topicuszorg.laos.model.response.MountState;
import nl.topicuszorg.laos.model.response.MountedDevice;

import org.xml.sax.SAXException;

import com.dd.plist.NSArray;
import com.dd.plist.NSDictionary;
import com.dd.plist.NSObject;
import com.dd.plist.NSString;
import com.dd.plist.PropertyListFormatException;
import com.dd.plist.PropertyListParser;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableList.Builder;

public class USBHelpers
{
  private static final String SYSTEM_PROFILER_COMMAND = "/usr/sbin/system_profiler";

  private static final String SPUSB_DATA_TYPE = "SPUSBDataType";

  private interface SpUSBDataTypeIdentifiers
  {
    String ITEMS = "_items";

    String VOLUMES = "volumes";

    String VENDOR_ID = "vendor_id";

    String MOUNT_POINT = "mount_point";

    String NAME = "_name";
  }

  public static List<MountedDevice> findMountedDevicesOsX() throws IOException, PropertyListFormatException,
    ParseException, ParserConfigurationException, SAXException
  {
    final Process process = new ProcessBuilder(SYSTEM_PROFILER_COMMAND, SPUSB_DATA_TYPE, "-xml")
      .start();
    return findMountedDevicesInConfiguration(process.getInputStream());
  }

  private static List<MountedDevice> findMountedDevicesInConfiguration(final InputStream processInputStream)
    throws IOException, PropertyListFormatException, ParseException, ParserConfigurationException, SAXException
  {
    // Root is an array, the USB devices are hierarchical in _items (and eg. _items(0)._items)
    final NSArray array = (NSArray) (PropertyListParser.parse(processInputStream));
    final NSDictionary dict = (NSDictionary) array.objectAtIndex(0);
    final NSArray itemsArray = (NSArray) dict.get(SpUSBDataTypeIdentifiers.ITEMS);
    return recurseUSBDevices(itemsArray);
  }

  public static List<MountedDevice> recurseUSBDevices(NSArray items)
  {
    final Builder<MountedDevice> builder = ImmutableList.builder();
    for (NSObject item : items.getArray())
    {
      builder.addAll(recurseUSBDevice((NSDictionary) item));
    }

    return builder.build();
  }

  private static List<MountedDevice> recurseUSBDevice(final NSDictionary dict)
  {
    final Builder<MountedDevice> builder = ImmutableList.builder();
    for (final Map.Entry<String, NSObject> entry : dict.entrySet())
    {
      if (entry.getKey().equals(SpUSBDataTypeIdentifiers.ITEMS))
      {
        // The USB device is a hub
        builder.addAll(recurseUSBDevices((NSArray) entry.getValue()));
      }
      if (entry.getKey().equals(SpUSBDataTypeIdentifiers.VOLUMES))
      {
        // This is a mountable device. We need to get the volumes, and for each volume, return it.
        List<MountedDevice> mountedDeviceOpt = parseVolumes((NSArray) (entry.getValue()));
        for (MountedDevice mountedDevice : mountedDeviceOpt)
        {
          mountedDevice.setVendorId(((NSString) dict.get(SpUSBDataTypeIdentifiers.VENDOR_ID)).toString());
          builder.add(mountedDevice);
        }
      }
    }
    return builder.build();
  }

  private static List<MountedDevice> parseVolumes(final NSArray nsArray)
  {
    final Builder<MountedDevice> builder = ImmutableList.builder();
    for (final NSObject item : nsArray.getArray())
    {
      builder.add(parseVolume((NSDictionary) item));
    }
    return builder.build();

  }

  private static MountedDevice parseVolume(final NSDictionary item)
  {
    final String mountPoint = ((NSString) item.get(SpUSBDataTypeIdentifiers.MOUNT_POINT)).toString();
    final String name = ((NSString) item.get(SpUSBDataTypeIdentifiers.NAME)).toString();
    return new MountedDevice(mountPoint, name, null, null, MountState.MOUNTED);
  }

}