357 lines
10 KiB
C++
357 lines
10 KiB
C++
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// this file almost totally copied from MSDN
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#include <windows.h>
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#include <stdio.h>
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#include <winioctl.h>
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#define LOCK_TIMEOUT 3000 // 10 Seconds
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#define LOCK_RETRIES 20
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#if 1 // old way
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static HANDLE OpenVolume(TCHAR cDriveLetter)
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{
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HANDLE hVolume;
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UINT uDriveType;
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wchar_t szVolumeName[8] = {0};
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wchar_t szRootName[5] = {0};
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DWORD dwAccessFlags = 0;
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cDriveLetter &= ~0x20; // capitalize
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wsprintf(szRootName, L"%c:\\", cDriveLetter);
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uDriveType = GetDriveType(szRootName);
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switch(uDriveType) {
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case DRIVE_REMOVABLE:
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dwAccessFlags = GENERIC_READ | GENERIC_WRITE;
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break;
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case DRIVE_CDROM:
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dwAccessFlags = GENERIC_READ;
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break;
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default:
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printf("Cannot eject. Drive type is incorrect.\n");
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return INVALID_HANDLE_VALUE;
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}
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wsprintf(szVolumeName, L"\\\\.\\%c:", cDriveLetter);
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hVolume = CreateFile( szVolumeName,
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dwAccessFlags,
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FILE_SHARE_READ | FILE_SHARE_WRITE,
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NULL,
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OPEN_EXISTING,
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0,
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NULL );
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if (hVolume == INVALID_HANDLE_VALUE)
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printf("CreateFile error %d\n", GetLastError());
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return hVolume;
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}
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static BOOL CloseVolume(HANDLE hVolume)
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{
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return CloseHandle(hVolume);
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}
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static BOOL LockVolume(HANDLE hVolume)
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{
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DWORD dwBytesReturned;
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DWORD dwSleepAmount;
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int nTryCount;
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dwSleepAmount = LOCK_TIMEOUT / LOCK_RETRIES;
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// Do this in a loop until a timeout period has expired
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for (nTryCount = 0; nTryCount < LOCK_RETRIES; nTryCount++) {
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if (DeviceIoControl(hVolume,
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FSCTL_LOCK_VOLUME,
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NULL, 0,
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NULL, 0,
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&dwBytesReturned,
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NULL))
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return TRUE;
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Sleep(dwSleepAmount);
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}
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return FALSE;
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}
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static BOOL DismountVolume(HANDLE hVolume)
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{
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DWORD dwBytesReturned;
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return DeviceIoControl( hVolume,
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FSCTL_DISMOUNT_VOLUME,
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NULL, 0,
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NULL, 0,
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&dwBytesReturned,
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NULL);
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}
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static BOOL PreventRemovalOfVolume(HANDLE hVolume, BOOL fPreventRemoval)
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{
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DWORD dwBytesReturned;
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PREVENT_MEDIA_REMOVAL PMRBuffer;
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PMRBuffer.PreventMediaRemoval = fPreventRemoval;
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return DeviceIoControl( hVolume,
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IOCTL_STORAGE_MEDIA_REMOVAL,
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&PMRBuffer, sizeof(PREVENT_MEDIA_REMOVAL),
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NULL, 0,
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&dwBytesReturned,
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NULL);
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}
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static int AutoEjectVolume(HANDLE hVolume)
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{
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DWORD dwBytesReturned;
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return DeviceIoControl( hVolume,
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IOCTL_STORAGE_EJECT_MEDIA,
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NULL, 0,
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NULL, 0,
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&dwBytesReturned,
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NULL);
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}
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BOOL EjectVolume(TCHAR cDriveLetter)
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{
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HANDLE hVolume;
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BOOL fAutoEject = FALSE;
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hVolume = OpenVolume(cDriveLetter);
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if (hVolume == INVALID_HANDLE_VALUE)
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return FALSE;
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// Lock and dismount the volume.
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if (LockVolume(hVolume) && DismountVolume(hVolume)) {
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// Set prevent removal to false and eject the volume.
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if (PreventRemovalOfVolume(hVolume, FALSE) && AutoEjectVolume(hVolume))
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fAutoEject = TRUE;
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}
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// Close the volume so other processes can use the drive.
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if (!CloseVolume(hVolume))
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return FALSE;
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if (fAutoEject) return TRUE;
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else return FALSE;
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}
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#else
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#include <stdio.h>
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#include <windows.h>
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#include <Setupapi.h>
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#include <winioctl.h>
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#include <winioctl.h>
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#include <cfgmgr32.h>
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#pragma comment(lib, "setupapi.lib")
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//-------------------------------------------------
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//----------------------------------------------------------------------
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// returns the device instance handle of a storage volume or 0 on error
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//----------------------------------------------------------------------
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static DEVINST GetDrivesDevInstByDeviceNumber(long DeviceNumber, UINT DriveType, const wchar_t* szDosDeviceName)
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{
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bool IsFloppy = (wcsstr(szDosDeviceName, L"\\Floppy") != NULL); // who knows a better way?
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GUID* guid;
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switch (DriveType) {
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case DRIVE_REMOVABLE:
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if ( IsFloppy ) {
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guid = (GUID*)&GUID_DEVINTERFACE_FLOPPY;
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} else {
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guid = (GUID*)&GUID_DEVINTERFACE_DISK;
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}
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break;
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case DRIVE_FIXED:
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guid = (GUID*)&GUID_DEVINTERFACE_DISK;
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break;
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case DRIVE_CDROM:
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guid = (GUID*)&GUID_DEVINTERFACE_CDROM;
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break;
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default:
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return 0;
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}
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// Get device interface info set handle for all devices attached to system
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HDEVINFO hDevInfo = SetupDiGetClassDevs(guid, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
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if (hDevInfo == INVALID_HANDLE_VALUE) {
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return 0;
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}
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// Retrieve a context structure for a device interface of a device information set
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DWORD dwIndex = 0;
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long res;
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BYTE Buf[1024] = {0};
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PSP_DEVICE_INTERFACE_DETAIL_DATA pspdidd = (PSP_DEVICE_INTERFACE_DETAIL_DATA)Buf;
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SP_DEVICE_INTERFACE_DATA spdid;
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SP_DEVINFO_DATA spdd;
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DWORD dwSize;
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spdid.cbSize = sizeof(spdid);
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while ( true ) {
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res = SetupDiEnumDeviceInterfaces(hDevInfo, NULL, guid, dwIndex, &spdid);
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if ( !res ) {
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break;
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}
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dwSize = 0;
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SetupDiGetDeviceInterfaceDetail(hDevInfo, &spdid, NULL, 0, &dwSize, NULL); // check the buffer size
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if ( dwSize!=0 && dwSize<=sizeof(Buf) ) {
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pspdidd->cbSize = sizeof(*pspdidd); // 5 Bytes!
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ZeroMemory(&spdd, sizeof(spdd));
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spdd.cbSize = sizeof(spdd);
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long res = SetupDiGetDeviceInterfaceDetail(hDevInfo, &spdid, pspdidd, dwSize, &dwSize, &spdd);
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if ( res ) {
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// in case you are interested in the USB serial number:
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// the device id string contains the serial number if the device has one,
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// otherwise a generated id that contains the '&' char...
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/*
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DEVINST DevInstParent = 0;
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CM_Get_Parent(&DevInstParent, spdd.DevInst, 0);
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char szDeviceIdString[MAX_PATH] = {0};
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CM_Get_Device_ID(DevInstParent, szDeviceIdString, MAX_PATH, 0);
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printf("DeviceId=%s\n", szDeviceIdString);
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*/
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// open the disk or cdrom or floppy
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HANDLE hDrive = CreateFile(pspdidd->DevicePath, 0, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
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if ( hDrive != INVALID_HANDLE_VALUE ) {
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// get its device number
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STORAGE_DEVICE_NUMBER sdn;
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DWORD dwBytesReturned = 0;
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res = DeviceIoControl(hDrive, IOCTL_STORAGE_GET_DEVICE_NUMBER, NULL, 0, &sdn, sizeof(sdn), &dwBytesReturned, NULL);
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if ( res ) {
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if ( DeviceNumber == (long)sdn.DeviceNumber ) { // match the given device number with the one of the current device
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CloseHandle(hDrive);
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SetupDiDestroyDeviceInfoList(hDevInfo);
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return spdd.DevInst;
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}
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}
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CloseHandle(hDrive);
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}
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}
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}
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dwIndex++;
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}
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SetupDiDestroyDeviceInfoList(hDevInfo);
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return 0;
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}
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//-------------------------------------------------
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//-------------------------------------------------
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BOOL EjectVolume(TCHAR DriveLetter)
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{
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DriveLetter &= ~0x20; // uppercase
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if ( DriveLetter < 'A' || DriveLetter > 'Z' ) {
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return FALSE;
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}
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wchar_t szRootPath[] = L"X:\\"; // "X:\" -> for GetDriveType
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szRootPath[0] = DriveLetter;
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wchar_t szDevicePath[] = L"X:"; // "X:" -> for QueryDosDevice
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szDevicePath[0] = DriveLetter;
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wchar_t szVolumeAccessPath[] = L"\\\\.\\X:"; // "\\.\X:" -> to open the volume
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szVolumeAccessPath[4] = DriveLetter;
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long DeviceNumber = -1;
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// open the storage volume
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HANDLE hVolume = CreateFileW(szVolumeAccessPath, 0, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, NULL, NULL);
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if (hVolume == INVALID_HANDLE_VALUE) {
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return FALSE;
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}
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// get the volume's device number
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STORAGE_DEVICE_NUMBER sdn;
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DWORD dwBytesReturned = 0;
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long res = DeviceIoControl(hVolume, IOCTL_STORAGE_GET_DEVICE_NUMBER, NULL, 0, &sdn, sizeof(sdn), &dwBytesReturned, NULL);
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if ( res ) {
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DeviceNumber = sdn.DeviceNumber;
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}
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CloseHandle(hVolume);
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if ( DeviceNumber == -1 ) {
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return FALSE;
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}
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// get the drive type which is required to match the device numbers correctely
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UINT DriveType = GetDriveType(szRootPath);
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// get the dos device name (like \device\floppy0) to decide if it's a floppy or not - who knows a better way?
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wchar_t szDosDeviceName[MAX_PATH] = {0};
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res = QueryDosDevice(szDevicePath, szDosDeviceName, MAX_PATH);
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if ( !res ) {
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return FALSE;
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}
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// get the device instance handle of the storage volume by means of a SetupDi enum and matching the device number
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DEVINST DevInst = GetDrivesDevInstByDeviceNumber(DeviceNumber, DriveType, szDosDeviceName);
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if ( DevInst == 0 ) {
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return FALSE;
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}
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PNP_VETO_TYPE VetoType = PNP_VetoTypeUnknown;
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wchar_t VetoNameW[MAX_PATH] = {0};
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bool bSuccess = false;
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// get drives's parent, e.g. the USB bridge, the SATA port, an IDE channel with two drives!
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DEVINST DevInstParent = 0;
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res = CM_Get_Parent(&DevInstParent, DevInst, 0);
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for ( long tries=1; tries<=3; tries++ ) { // sometimes we need some tries...
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VetoNameW[0] = 0;
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// CM_Query_And_Remove_SubTree doesn't work for restricted users
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//res = CM_Query_And_Remove_SubTreeW(DevInstParent, &VetoType, VetoNameW, MAX_PATH, CM_REMOVE_NO_RESTART); // CM_Query_And_Remove_SubTreeA is not implemented under W2K!
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//res = CM_Query_And_Remove_SubTreeW(DevInstParent, NULL, NULL, 0, CM_REMOVE_NO_RESTART); // with messagebox (W2K, Vista) or balloon (XP)
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res = CM_Request_Device_EjectW(DevInstParent, &VetoType, VetoNameW, MAX_PATH, 0);
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//res = CM_Request_Device_EjectW(DevInstParent, NULL, NULL, 0, 0); // with messagebox (W2K, Vista) or balloon (XP)
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bSuccess = (res==CR_SUCCESS && VetoType==PNP_VetoTypeUnknown);
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if ( bSuccess ) {
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break;
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}
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Sleep(500); // required to give the next tries a chance!
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}
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if ( bSuccess ) {
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printf("Success\n\n");
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return TRUE;
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}
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printf("failed\n");
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printf("Result=0x%2X\n", res);
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if ( VetoNameW[0] ) {
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printf("VetoName=%ws)\n\n", VetoNameW);
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}
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return FALSE;
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}
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//-----------------------------------------------------------
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#endif
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