void mountBootableVolumesIfRequried()

in host/common/win32/portablehelpersmajor.cpp [4962:5036]
72 lines of code
20 McCabe index (conditional complexity)

void mountBootableVolumesIfRequried()
{
    static bool isVolFilter = false;
    static bool isDiskFilter = false;
    LocalConfigurator localConfigurator;
    if (!isDiskFilter && !isVolFilter && localConfigurator.IsFilterDriverAvailable())
    {
        DeviceStream::Ptr pDeviceStream(new DeviceStream(INMAGE_DISK_FILTER_DOS_DEVICE_NAME));
        if (SV_SUCCESS == pDeviceStream->Open(DeviceStream::Mode_Open | DeviceStream::Mode_Read | DeviceStream::Mode_ShareRW))
        {
            isDiskFilter = true;
        }
        else
        {
            pDeviceStream.reset(new DeviceStream(INMAGE_FILTER_DEVICE_NAME));
            if (SV_SUCCESS == pDeviceStream->Open(DeviceStream::Mode_Open | DeviceStream::Mode_Read | DeviceStream::Mode_ShareRW))
            {
                isVolFilter = true;
            }
        }
    }
    /* GetVolumePathNamesForVolumeName is not supported in win2k */
#ifndef SCOUT_WIN2K_SUPPORT
    char volGuid[256] = { 0 };  // buffer to hold GUID of a volume.
    HANDLE pHandle = NULL;
    pHandle = FindFirstVolume(volGuid, sizeof(volGuid) - 1);
    if (pHandle != INVALID_HANDLE_VALUE)
    {
        do
        {
            LPTSTR VolumePathName = NULL;
            DWORD rlen = 0;
            GetVolumePathNamesForVolumeName(volGuid, VolumePathName, 0, &rlen);
            if (GetLastError() == ERROR_MORE_DATA)
            {
                size_t pathnamelen;
                INM_SAFE_ARITHMETIC(pathnamelen = InmSafeInt<DWORD>::Type(rlen) * 2, INMAGE_EX(rlen))
                    VolumePathName = (LPTSTR)malloc(pathnamelen);
                memset(VolumePathName, 0, rlen * 2);
                if (VolumePathName != NULL && GetVolumePathNamesForVolumeName(volGuid, VolumePathName, rlen * 2, &rlen))
                {
                    if (VolumePathName[0] == '\0')
                    {
                        // This volume does not have drive letter.
                        //check whether it is SRV or not.						 
                        if (isVolFilter && isBootableVolume(volGuid))
                        {
                            mountVolume(volGuid);
                        }
                    }
                    else
                    {
                        if (isDiskFilter && (0 == strcmp(VolumePathName, INM_BOOT_VOLUME_MOUNTPOINT)) && isBootableVolume(volGuid))
                        {
                            boost::filesystem::exists(std::string(INM_BOOT_VOLUME_MOUNTPOINT)) &&
                                DeleteVolumeMountPoint(INM_BOOT_VOLUME_MOUNTPOINT) &&
                                boost::filesystem::remove(std::string(INM_BOOT_VOLUME_MOUNTPOINT));
                        }
                    }
                }
                if (VolumePathName != NULL)
                {
                    free(VolumePathName);
                    VolumePathName = NULL;
                }
            }
        } while (FindNextVolume(pHandle, volGuid, sizeof(volGuid) - 1));
        FindVolumeClose(pHandle);
    }
    else
    {
        DebugPrintf(SV_LOG_ERROR, "FindFirstVolume() Failed. \n");
    }
#endif
}