nsresult
sbWinGetVolumeGUIDPath(DEVINST aDevInst,
nsAString& aVolumeGUIDPath)
{
BOOL success;
nsresult rv;
// Get the volume device interface path.
GUID guid = GUID_DEVINTERFACE_VOLUME;
nsAutoString volumeDeviceInterfacePath;
rv = sbWinGetDevicePath(aDevInst, &guid, volumeDeviceInterfacePath);
NS_ENSURE_SUCCESS(rv, rv);
// Get the volume GUID path. The mount point must end with "\\".
static const DWORD volumeGUIDPathLength = 51;
WCHAR volumeGUIDPath[volumeGUIDPathLength];
volumeDeviceInterfacePath.AppendLiteral("\\");
success = GetVolumeNameForVolumeMountPointW(volumeDeviceInterfacePath.get(),
volumeGUIDPath,
volumeGUIDPathLength);
NS_ENSURE_TRUE(success, NS_ERROR_FAILURE);
// Return results.
aVolumeGUIDPath.Assign(volumeGUIDPath);
return NS_OK;
}
nsresult
sbWinVolumeIsReady(DEVINST aDevInst,
PRBool* aIsReady)
{
// Validate arguments.
NS_ENSURE_ARG_POINTER(aIsReady);
// Function variables.
PRBool success;
nsresult rv;
// Get the volume device interface path.
GUID guid = GUID_DEVINTERFACE_VOLUME;
nsAutoString volumeDeviceInterfacePath;
rv = sbWinGetDevicePath(aDevInst, &guid, volumeDeviceInterfacePath);
NS_ENSURE_SUCCESS(rv, rv);
// Try getting the volume GUID path. If this fails, the volume is not ready.
static const DWORD volumeGUIDPathLength = 51;
WCHAR volumeGUIDPath[volumeGUIDPathLength];
volumeDeviceInterfacePath.AppendLiteral("\\");
success = GetVolumeNameForVolumeMountPointW(volumeDeviceInterfacePath.get(),
volumeGUIDPath,
volumeGUIDPathLength);
if (!success) {
*aIsReady = PR_FALSE;
return NS_OK;
}
// Try getting the volume information. If this fails, the volume is not
// ready.
DWORD fileSystemFlags;
WCHAR volumeLabel[MAX_PATH+1];
WCHAR fileSystemName[MAX_PATH+1];
success = GetVolumeInformationW(volumeDeviceInterfacePath.BeginReading(),
volumeLabel,
NS_ARRAY_LENGTH(volumeLabel),
NULL,
NULL,
&fileSystemFlags,
fileSystemName,
NS_ARRAY_LENGTH(fileSystemName));
if (!success) {
*aIsReady = PR_FALSE;
return NS_OK;
}
// The volume is ready.
*aIsReady = PR_TRUE;
return NS_OK;
}
nsresult
sbWinGetStorageDevNum(DEVINST aDevInst,
const GUID* aGUID,
STORAGE_DEVICE_NUMBER* aStorageDevNum)
{
// Validate arguments.
NS_ENSURE_ARG_POINTER(aStorageDevNum);
NS_ENSURE_ARG_POINTER(aGUID);
// Function variables.
nsresult rv;
// Get the device interface path.
nsAutoString deviceInterfacePath;
rv = sbWinGetDevicePath(aDevInst, aGUID, deviceInterfacePath);
NS_ENSURE_SUCCESS(rv, rv);
return sbWinGetStorageDevNum(deviceInterfacePath.get(), aStorageDevNum);
}
nsresult
sbWinCreateDeviceFile(HANDLE* aDevFile,
DEVINST aDevInst,
const GUID* aGUID,
DWORD aDesiredAccess,
DWORD aShareMode,
LPSECURITY_ATTRIBUTES aSecurityAttributes,
DWORD aCreationDisposition,
DWORD aFlagsAndAttributes,
HANDLE aTemplateFile)
{
// Validate arguments.
NS_ENSURE_ARG_POINTER(aDevFile);
NS_ENSURE_ARG_POINTER(aGUID);
// Function variables.
nsresult rv;
// Get the device path.
nsAutoString devicePath;
rv = sbWinGetDevicePath(aDevInst, aGUID, devicePath);
NS_ENSURE_SUCCESS(rv, rv);
// Create the device file.
HANDLE devFile = CreateFileW(devicePath.get(),
aDesiredAccess,
aShareMode,
aSecurityAttributes,
aCreationDisposition,
aFlagsAndAttributes,
aTemplateFile);
NS_ENSURE_TRUE(devFile != INVALID_HANDLE_VALUE, NS_ERROR_FAILURE);
// Return results.
*aDevFile = devFile;
return NS_OK;
}
