Test wince

http://blog.csdn.net/achellies/article/details/4533881
http://blog.csdn.net/CoolSlob/article/details/3348147
1、可根据dbch_devicetype（DBT_DEVTYP_DEVICEINTERFACE和DBT_DEVTYP_VOLUME），分别得到PID/VID/SN和盘符号。
2、当USB设备不是存储设备时，只出发一次WM_DEVICECHANGE，devicetype是DBT_DEVTYP_DEVICEINTERFACE
3、当USB设备是存储设备时，会触发两次WM_DEVICECHANGE，一次是DBT_DEVTYP_DEVICEINTERFACE、一次是DBT_DEVTYP_VOLUME
4、插入时，先DBT_DEVTYP_DEVICEINTERFACE后DBT_DEVTYP_VOLUME
5、拔出时，先DBT_DEVTYP_VOLUME后DBT_DEVTYP_DEVICEINTERFACE
6、即使是存储设备，有时也不会触发DBT_DEVTYP_VOLUME，这个问题还没搞清楚。

case WM_DEVICECHANGE:
		{
				DbgPrint(_T("WM_DEVICECHANGE/n"));
				switch (wParam)
				{
				case DBT_DEVICEARRIVAL:
					{
						PDEV_BROADCAST_HDR pDBHdr = (PDEV_BROADCAST_HDR)lParam;
						switch(pDBHdr->dbch_devicetype)
						{
						case DBT_DEVTYP_DEVICEINTERFACE:
							{
								PDEV_BROADCAST_DEVICEINTERFACE pDBInteface = (PDEV_BROADCAST_DEVICEINTERFACE)pDBHdr;

								LPOLESTR pGuid = NULL;
								StringFromCLSID(pDBInteface->dbcc_classguid,&pGuid);

								DbgPrint(_T("DBT_DEVTYP_DEVICEINTERFACE,Device CLSID = %s,Device Name = %s/n"),pGuid,pDBInteface->dbcc_name);
								CoTaskMemFree(pGuid);

								break;
							}
						case DBT_DEVTYP_HANDLE:
							{
								PDEV_BROADCAST_HANDLE pDBHandler = (PDEV_BROADCAST_HANDLE)pDBHdr;

								LPOLESTR pGuid = NULL;
								StringFromCLSID(pDBHandler->dbch_eventguid,&pGuid);

								DbgPrint(_T("DBT_DEVTYP_HANDLE,Device CLSID = %s/n"),pGuid);
								CoTaskMemFree(pGuid);
								break;
							}
						case DBT_DEVTYP_OEM:
							DbgPrint( _T("DBT_DEVTYP_OEM!/n"));
							break;
						case DBT_DEVTYP_PORT:
							{
								PDEV_BROADCAST_PORT pDBPort = (PDEV_BROADCAST_PORT)pDBHdr;
								DbgPrint(_T("DBT_DEVTYP_PORT = %s/n"),pDBPort->dbcp_name);
								break;
							}
						case DBT_DEVTYP_VOLUME:
							DbgPrint( _T("DBT_DEVTYP_VOLUME!/n"));
							break;
						}
						break;
					}
				case DBT_DEVICEREMOVECOMPLETE:
					{
						PDEV_BROADCAST_HDR pDBHdr = (PDEV_BROADCAST_HDR)lParam;
						switch(pDBHdr->dbch_devicetype)
						{
						case DBT_DEVTYP_DEVICEINTERFACE:
							{
								PDEV_BROADCAST_DEVICEINTERFACE pDBInteface = (PDEV_BROADCAST_DEVICEINTERFACE)pDBHdr;

								LPOLESTR pGuid = NULL;
								StringFromCLSID(pDBInteface->dbcc_classguid,&pGuid);

								DbgPrint(_T("DBT_DEVICEREMOVECOMPLETE,Device CLSID = %s,Device Name = %s/n"),pGuid,pDBInteface->dbcc_name);
								CoTaskMemFree(pGuid);

								break;
							}
						case DBT_DEVTYP_HANDLE:
							{
								PDEV_BROADCAST_HANDLE pDBHandler = (PDEV_BROADCAST_HANDLE)pDBHdr;

								LPOLESTR pGuid = NULL;
								StringFromCLSID(pDBHandler->dbch_eventguid,&pGuid);

								DbgPrint(_T("DBT_DEVTYP_HANDLE,Device CLSID = %s/n"),pGuid);
								CoTaskMemFree(pGuid);
								break;
							}
						case DBT_DEVTYP_OEM:
							DbgPrint( _T("DBT_DEVTYP_OEM!/n"));
							break;
						case DBT_DEVTYP_PORT:
							{
								PDEV_BROADCAST_PORT pDBPort = (PDEV_BROADCAST_PORT)pDBHdr;

								DbgPrint(_T("DBT_DEVTYP_PORT = %s/n"),pDBPort->dbcp_name);

								break;
							}
						case DBT_DEVTYP_VOLUME:
							DbgPrint( _T("DBT_DEVTYP_VOLUME!/n"));
							break;
						}
						break;
					}
			}
			return LRESULT(TRUE);
		}

rpath.pri
OTHER PLATFORM
Use QAbstractEventDispatcher. See QxtGlobalShortcut

other device
windows and other platforms. See QDrive
watch /etc/mtab for linux 2.4

GUI example


from armv6:
tid=0x4001fe20 HotplugWatcher::HotplugWatcher(QObject*)
Hotplug watcher started
parseDeviceInfo: "read fro socket 239 bytes"
parseLine: "add@/devices/platform/tcc-ohci/usb1/1-1/1-1.2"
parseLine: "ACTION=add"
parseLine: "DEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2"
parseLine: "SUBSYSTEM=usb"
parseLine: "MAJOR=189"
parseLine: "MINOR=4"
parseLine: "DEVTYPE=usb_device"
parseLine: "PHYSDEVBUS=usb"
parseLine: "PRODUCT=125f/312a/a00"
parseLine: "TYPE=0/0/0"
parseLine: "BUSNUM=001"
parseLine: "DEVNUM=005"
parseLine: "SEQNUM=755"
parseDeviceInfo: "read fro socket 294 bytes"
parseLine: "add@/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0"
parseLine: "ACTION=add"
parseLine: "DEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0"
parseLine: "SUBSYSTEM=usb"
parseLine: "DEVTYPE=usb_interface"
parseLine: "PHYSDEVBUS=usb"
parseLine: "PRODUCT=125f/312a/a00"
parseLine: "TYPE=0/0/0"
parseLine: "INTERFACE=8/6/80"
parseLine: "MODALIAS=usb:v125Fp312Ad0A00dc00dsc00dp00ic08isc06ip50"
parseLine: "SEQNUM=756"
parseDeviceInfo: "read fro socket 205 bytes"
parseLine: "add@/class/scsi_host/host5"
parseLine: "ACTION=add"
parseLine: "DEVPATH=/class/scsi_host/host5"
parseLine: "SUBSYSTEM=scsi_host"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0"
parseLine: "PHYSDEVBUS=usb"
parseLine: "PHYSDEVDRIVER=usb-storage"
parseLine: "SEQNUM=757"
parseDeviceInfo: "read fro socket 251 bytes"
parseLine: "add@/class/usb_endpoint/usbdev1.5_ep02"
parseLine: "ACTION=add"
parseLine: "DEVPATH=/class/usb_endpoint/usbdev1.5_ep02"
parseLine: "SUBSYSTEM=usb_endpoint"
parseLine: "MAJOR=253"
parseLine: "MINOR=20"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0"
parseLine: "PHYSDEVBUS=usb"
parseLine: "PHYSDEVDRIVER=usb-storage"
parseLine: "SEQNUM=758"
parseDeviceInfo: "read fro socket 251 bytes"
parseLine: "add@/class/usb_endpoint/usbdev1.5_ep81"
parseLine: "ACTION=add"
parseLine: "DEVPATH=/class/usb_endpoint/usbdev1.5_ep81"
parseLine: "SUBSYSTEM=usb_endpoint"
parseLine: "MAJOR=253"
parseLine: "MINOR=21"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0"
parseLine: "PHYSDEVBUS=usb"
parseLine: "PHYSDEVDRIVER=usb-storage"
parseLine: "SEQNUM=759"
parseDeviceInfo: "read fro socket 233 bytes"
parseLine: "add@/class/usb_endpoint/usbdev1.5_ep00"
parseLine: "ACTION=add"
parseLine: "DEVPATH=/class/usb_endpoint/usbdev1.5_ep00"
parseLine: "SUBSYSTEM=usb_endpoint"
parseLine: "MAJOR=253"
parseLine: "MINOR=22"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2"
parseLine: "PHYSDEVBUS=usb"
parseLine: "PHYSDEVDRIVER=usb"
parseLine: "SEQNUM=760"
parseDeviceInfo: "read fro socket 262 bytes"
parseLine: "add@/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0"
parseLine: "ACTION=add"
parseLine: "DEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0"
parseLine: "SUBSYSTEM=scsi"
parseLine: "DEVTYPE=scsi_device"
parseLine: "PHYSDEVBUS=scsi"
parseLine: "MODALIAS=scsi:t-0x00"
parseLine: "SEQNUM=761"
parseDeviceInfo: "read fro socket 227 bytes"
parseLine: "add@/class/scsi_disk/5:0:0:0"
parseLine: "ACTION=add"
parseLine: "DEVPATH=/class/scsi_disk/5:0:0:0"
parseLine: "SUBSYSTEM=scsi_disk"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0"
parseLine: "PHYSDEVBUS=scsi"
parseLine: "PHYSDEVDRIVER=sd"
parseLine: "SEQNUM=762"
parseDeviceInfo: "read fro socket 315 bytes"
parseLine: "change@/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0"
parseLine: "ACTION=change"
parseLine: "DEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0"
parseLine: "SUBSYSTEM=scsi"
parseLine: "SDEV_MEDIA_CHANGE=1"
parseLine: "DEVTYPE=scsi_device"
parseLine: "DRIVER=sd"
parseLine: "PHYSDEVBUS=scsi"
parseLine: "PHYSDEVDRIVER=sd"
parseLine: "MODALIAS=scsi:t-0x00"
parseLine: "SEQNUM=763"
parseDeviceInfo: "read fro socket 225 bytes"
parseLine: "add@/block/sdc"
parseLine: "ACTION=add"
parseLine: "DEVPATH=/block/sdc"
parseLine: "SUBSYSTEM=block"
parseLine: "MAJOR=8"
parseLine: "MINOR=32"
parseLine: "DEVTYPE=disk"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0"
parseLine: "PHYSDEVBUS=scsi"
parseLine: "PHYSDEVDRIVER=sd"
parseLine: "SEQNUM=764"
parseDeviceInfo: "read fro socket 240 bytes"
parseLine: "add@/block/sdc/sdc1"
parseLine: "ACTION=add"
parseLine: "DEVPATH=/block/sdc/sdc1"
parseLine: "SUBSYSTEM=block"
parseLine: "MAJOR=8"
parseLine: "MINOR=33"
parseLine: "DEVTYPE=partition"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0"
parseLine: "PHYSDEVBUS=scsi"
parseLine: "PHYSDEVDRIVER=sd"
parseLine: "SEQNUM=765"
parseDeviceInfo: "read fro socket 80 bytes"
parseLine: "add@/class/bdi/8:32"
parseLine: "ACTION=add"
parseLine: "DEVPATH=/class/bdi/8:32"
parseLine: "SUBSYSTEM=bdi"
parseLine: "SEQNUM=766"
parseDeviceInfo: "read fro socket 233 bytes"
parseLine: "add@/class/scsi_device/5:0:0:0"
parseLine: "ACTION=add"
parseLine: "DEVPATH=/class/scsi_device/5:0:0:0"
parseLine: "SUBSYSTEM=scsi_device"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0"
parseLine: "PHYSDEVBUS=scsi"
parseLine: "PHYSDEVDRIVER=sd"
parseLine: "SEQNUM=767"
parseDeviceInfo: "read fro socket 245 bytes"
parseLine: "add@/class/scsi_generic/sg2"
parseLine: "ACTION=add"
parseLine: "DEVPATH=/class/scsi_generic/sg2"
parseLine: "SUBSYSTEM=scsi_generic"
parseLine: "MAJOR=21"
parseLine: "MINOR=2"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0"
parseLine: "PHYSDEVBUS=scsi"
parseLine: "PHYSDEVDRIVER=sd"
parseLine: "SEQNUM=768"
parseDeviceInfo: "read fro socket 257 bytes"
parseLine: "remove@/class/usb_endpoint/usbdev1.5_ep02"
parseLine: "ACTION=remove"
parseLine: "DEVPATH=/class/usb_endpoint/usbdev1.5_ep02"
parseLine: "SUBSYSTEM=usb_endpoint"
parseLine: "MAJOR=253"
parseLine: "MINOR=20"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0"
parseLine: "PHYSDEVBUS=usb"
parseLine: "PHYSDEVDRIVER=usb-storage"
parseLine: "SEQNUM=769"
parseDeviceInfo: "read fro socket 257 bytes"
parseLine: "remove@/class/usb_endpoint/usbdev1.5_ep81"
parseLine: "ACTION=remove"
parseLine: "DEVPATH=/class/usb_endpoint/usbdev1.5_ep81"
parseLine: "SUBSYSTEM=usb_endpoint"
parseLine: "MAJOR=253"
parseLine: "MINOR=21"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0"
parseLine: "PHYSDEVBUS=usb"
parseLine: "PHYSDEVDRIVER=usb-storage"
parseLine: "SEQNUM=770"
parseDeviceInfo: "read fro socket 251 bytes"
parseLine: "remove@/class/scsi_generic/sg2"
parseLine: "ACTION=remove"
parseLine: "DEVPATH=/class/scsi_generic/sg2"
parseLine: "SUBSYSTEM=scsi_generic"
parseLine: "MAJOR=21"
parseLine: "MINOR=2"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0"
parseLine: "PHYSDEVBUS=scsi"
parseLine: "PHYSDEVDRIVER=sd"
parseLine: "SEQNUM=771"
parseDeviceInfo: "read fro socket 239 bytes"
parseLine: "remove@/class/scsi_device/5:0:0:0"
parseLine: "ACTION=remove"
parseLine: "DEVPATH=/class/scsi_device/5:0:0:0"
parseLine: "SUBSYSTEM=scsi_device"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0"
parseLine: "PHYSDEVBUS=scsi"
parseLine: "PHYSDEVDRIVER=sd"
parseLine: "SEQNUM=772"
parseDeviceInfo: "read fro socket 233 bytes"
parseLine: "remove@/class/scsi_disk/5:0:0:0"
parseLine: "ACTION=remove"
parseLine: "DEVPATH=/class/scsi_disk/5:0:0:0"
parseLine: "SUBSYSTEM=scsi_disk"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0"
parseLine: "PHYSDEVBUS=scsi"
parseLine: "PHYSDEVDRIVER=sd"
parseLine: "SEQNUM=773"
parseDeviceInfo: "read fro socket 246 bytes"
parseLine: "remove@/block/sdc/sdc1"
parseLine: "ACTION=remove"
parseLine: "DEVPATH=/block/sdc/sdc1"
parseLine: "SUBSYSTEM=block"
parseLine: "MAJOR=8"
parseLine: "MINOR=33"
parseLine: "DEVTYPE=partition"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0"
parseLine: "PHYSDEVBUS=scsi"
parseLine: "PHYSDEVDRIVER=sd"
parseLine: "SEQNUM=774"
parseDeviceInfo: "read fro socket 86 bytes"
parseLine: "remove@/class/bdi/8:32"
parseLine: "ACTION=remove"
parseLine: "DEVPATH=/class/bdi/8:32"
parseLine: "SUBSYSTEM=bdi"
parseLine: "SEQNUM=775"
parseDeviceInfo: "read fro socket 231 bytes"
parseLine: "remove@/block/sdc"
parseLine: "ACTION=remove"
parseLine: "DEVPATH=/block/sdc"
parseLine: "SUBSYSTEM=block"
parseLine: "MAJOR=8"
parseLine: "MINOR=32"
parseLine: "DEVTYPE=disk"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0"
parseLine: "PHYSDEVBUS=scsi"
parseLine: "PHYSDEVDRIVER=sd"
parseLine: "SEQNUM=776"
parseDeviceInfo: "read fro socket 268 bytes"
parseLine: "remove@/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0"
parseLine: "ACTION=remove"
parseLine: "DEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0/host5/target5:0:0/5:0:0:0"
parseLine: "SUBSYSTEM=scsi"
parseLine: "DEVTYPE=scsi_device"
parseLine: "PHYSDEVBUS=scsi"
parseLine: "MODALIAS=scsi:t-0x00"
parseLine: "SEQNUM=777"
parseDeviceInfo: "read fro socket 211 bytes"
parseLine: "remove@/class/scsi_host/host5"
parseLine: "ACTION=remove"
parseLine: "DEVPATH=/class/scsi_host/host5"
parseLine: "SUBSYSTEM=scsi_host"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0"
parseLine: "PHYSDEVBUS=usb"
parseLine: "PHYSDEVDRIVER=usb-storage"
parseLine: "SEQNUM=778"
parseDeviceInfo: "read fro socket 300 bytes"
parseLine: "remove@/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0"
parseLine: "ACTION=remove"
parseLine: "DEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2/1-1.2:1.0"
parseLine: "SUBSYSTEM=usb"
parseLine: "DEVTYPE=usb_interface"
parseLine: "PHYSDEVBUS=usb"
parseLine: "PRODUCT=125f/312a/a00"
parseLine: "TYPE=0/0/0"
parseLine: "INTERFACE=8/6/80"
parseLine: "MODALIAS=usb:v125Fp312Ad0A00dc00dsc00dp00ic08isc06ip50"
parseLine: "SEQNUM=779"
parseDeviceInfo: "read fro socket 239 bytes"
parseLine: "remove@/class/usb_endpoint/usbdev1.5_ep00"
parseLine: "ACTION=remove"
parseLine: "DEVPATH=/class/usb_endpoint/usbdev1.5_ep00"
parseLine: "SUBSYSTEM=usb_endpoint"
parseLine: "MAJOR=253"
parseLine: "MINOR=22"
parseLine: "PHYSDEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2"
parseLine: "PHYSDEVBUS=usb"
parseLine: "PHYSDEVDRIVER=usb"
parseLine: "SEQNUM=780"
parseDeviceInfo: "read fro socket 245 bytes"
parseLine: "remove@/devices/platform/tcc-ohci/usb1/1-1/1-1.2"
parseLine: "ACTION=remove"
parseLine: "DEVPATH=/devices/platform/tcc-ohci/usb1/1-1/1-1.2"
parseLine: "SUBSYSTEM=usb"
parseLine: "MAJOR=189"
parseLine: "MINOR=4"
parseLine: "DEVTYPE=usb_device"
parseLine: "PHYSDEVBUS=usb"
parseLine: "PRODUCT=125f/312a/a00"
parseLine: "TYPE=0/0/0"
parseLine: "BUSNUM=001"
parseLine: "DEVNUM=005"
parseLine: "SEQNUM=781"