Function Ext2QueryDrvLetter

Ext2Mgr/enumDisk.cpp:995–1040

}

BOOL
Ext2QueryDrvLetter(
    PEXT2_LETTER    drvLetter
    )
{
	HANDLE	        hVolume;
    NT::NTSTATUS    status = STATUS_SUCCESS;
    DWORD           rc = 0; 

    drvLetter->DrvType = Ext2QueryDrive(drvLetter->Letter,
                                        drvLetter->SymLink);

    if (drvLetter->DrvType == DRIVE_NO_ROOT_DIR) {
        drvLetter->bUsed = FALSE;
        goto errorout;
    } else {
        drvLetter->bUsed = TRUE;
    }

    if (drvLetter->Letter == 'A' || 
        drvLetter->Letter == 'B' ) {
        drvLetter->bUsed = TRUE;
        goto errorout;
    }

    if (drvLetter->DrvType == DRIVE_REMOVABLE ||
        drvLetter->DrvType == DRIVE_FIXED) {

	    status = Ext2Open(drvLetter->SymLink, &hVolume, EXT2_DESIRED_ACCESS);
	    if (!NT_SUCCESS(status) && status != STATUS_ACCESS_DENIED) {
            drvLetter->bInvalid = TRUE;
            goto errorout;
	    }

  	    drvLetter->Extent = Ext2QueryVolumeExtents(hVolume);
        if (drvLetter->DrvType == DRIVE_REMOVABLE) {
            drvLetter->SDN = Ext2QueryDeviceNumber(hVolume);
        }

	    Ext2Close(&hVolume);
    }

errorout:

    return NT_SUCCESS(status);
}


PEXT2_LETTER Ext2GetFirstUnusedDrvLetter()