void ServiceManager::DeleteServiceObject(const tstring &ServiceName)
{
SCMHandleHolder schService(OpenServiceObject(ServiceName));
WaitForServiceStop(schService);
if (!DeleteService(schService))
{
throw UsbDkServiceManagerFailedException(TEXT("DeleteService failed"));
}
}
void ServiceManager::StartServiceObject(const tstring &ServiceName)
{
SCMHandleHolder schService(OpenServiceObject(ServiceName));
if (!StartService(SC_HANDLE(schService), 0, NULL))
{
throw UsbDkServiceManagerFailedException(TEXT("StartService failed"));
}
return;
}
void ServiceManager::CreateServiceObject(const tstring &ServiceName, const tstring &ServicePath)
{
assert(m_schSCManager);
SCMHandleHolder schService(CreateService(m_schSCManager, ServiceName.c_str(), ServiceName.c_str(), SERVICE_ALL_ACCESS, SERVICE_KERNEL_DRIVER,
SERVICE_DEMAND_START, SERVICE_ERROR_NORMAL, ServicePath.c_str(), nullptr, nullptr, nullptr, nullptr, nullptr));
if (!schService)
{
throw UsbDkServiceManagerFailedException(TEXT("CreateService failed"));
}
}
/**
* Uninstalls the Maintenance service.
*
* @return TRUE if successful.
*/
BOOL
SvcUninstall()
{
// Get a handle to the local computer SCM database with full access rights.
nsAutoServiceHandle schSCManager(OpenSCManager(NULL, NULL,
SC_MANAGER_ALL_ACCESS));
if (!schSCManager) {
LOG(("Could not open service manager. (%d)\n", GetLastError()));
return FALSE;
}
// Open the service
nsAutoServiceHandle schService(OpenServiceW(schSCManager, SVC_NAME,
SERVICE_ALL_ACCESS));
if (!schService) {
LOG(("Could not open service. (%d)\n", GetLastError()));
return FALSE;
}
//Stop the service so it deletes faster and so the uninstaller
// can actually delete its EXE.
DWORD totalWaitTime = 0;
SERVICE_STATUS status;
static const int maxWaitTime = 1000 * 60; // Never wait more than a minute
if (ControlService(schService, SERVICE_CONTROL_STOP, &status)) {
do {
Sleep(status.dwWaitHint);
totalWaitTime += (status.dwWaitHint + 10);
if (status.dwCurrentState == SERVICE_STOPPED) {
break;
} else if (totalWaitTime > maxWaitTime) {
break;
}
} while (QueryServiceStatus(schService, &status));
}
// Delete the service or mark it for deletion
BOOL deleted = DeleteService(schService);
if (!deleted) {
deleted = (GetLastError() == ERROR_SERVICE_MARKED_FOR_DELETE);
}
return deleted;
}
void ServiceManager::DeleteServiceObject(const tstring &ServiceName)
{
assert(m_schSCManager);
SCMHandleHolder schService(OpenService(m_schSCManager, ServiceName.c_str(), SERVICE_ALL_ACCESS));
if (!schService)
{
auto err = GetLastError();
if (err != ERROR_SERVICE_DOES_NOT_EXIST)
{
throw UsbDkServiceManagerFailedException(TEXT("OpenService failed with error "), err);
}
return;
}
WaitForServiceStop(schService);
if (!DeleteService(schService))
{
throw UsbDkServiceManagerFailedException(TEXT("DeleteService failed"));
}
}
/**
* Stops the Maintenance service.
*
* @return TRUE if successful.
*/
BOOL
StopService()
{
// Get a handle to the local computer SCM database with full access rights.
nsAutoServiceHandle schSCManager(OpenSCManager(NULL, NULL,
SC_MANAGER_ALL_ACCESS));
if (!schSCManager) {
LOG(("Could not open service manager. (%d)\n", GetLastError()));
return FALSE;
}
// Open the service
nsAutoServiceHandle schService(OpenServiceW(schSCManager, SVC_NAME,
SERVICE_ALL_ACCESS));
if (!schService) {
LOG(("Could not open service. (%d)\n", GetLastError()));
return FALSE;
}
LOG(("Sending stop request...\n"));
SERVICE_STATUS status;
SetLastError(ERROR_SUCCESS);
if (!ControlService(schService, SERVICE_CONTROL_STOP, &status) &&
GetLastError() != ERROR_SERVICE_NOT_ACTIVE) {
LOG(("Error sending stop request: %d\n", GetLastError()));
}
schSCManager.reset();
schService.reset();
LOG(("Waiting for service stop...\n"));
DWORD lastState = WaitForServiceStop(SVC_NAME, 30);
// The service can be in a stopped state but the exe still in use
// so make sure the process is really gone before proceeding
WaitForProcessExit(L"maintenanceservice.exe", 30);
LOG(("Done waiting for service stop, last service state: %d\n", lastState));
return lastState == SERVICE_STOPPED;
}
void ServiceManager::StopServiceObject(const tstring & ServiceName)
{
SCMHandleHolder schService(OpenServiceObject(ServiceName));
WaitForServiceStop(schService);
}
/**
* Installs or upgrades the SVC_NAME service.
* If an existing service is already installed, we replace it with the
* currently running process.
*
* @param action The action to perform.
* @return TRUE if the service was installed/upgraded
*/
BOOL
SvcInstall(SvcInstallAction action)
{
// Get a handle to the local computer SCM database with full access rights.
nsAutoServiceHandle schSCManager(OpenSCManager(NULL, NULL,
SC_MANAGER_ALL_ACCESS));
if (!schSCManager) {
LOG(("Could not open service manager. (%d)\n", GetLastError()));
return FALSE;
}
WCHAR newServiceBinaryPath[MAX_PATH + 1];
if (!GetModuleFileNameW(NULL, newServiceBinaryPath,
sizeof(newServiceBinaryPath) /
sizeof(newServiceBinaryPath[0]))) {
LOG(("Could not obtain module filename when attempting to "
"install service. (%d)\n",
GetLastError()));
return FALSE;
}
// Check if we already have the service installed.
nsAutoServiceHandle schService(OpenServiceW(schSCManager,
SVC_NAME,
SERVICE_ALL_ACCESS));
DWORD lastError = GetLastError();
if (!schService && ERROR_SERVICE_DOES_NOT_EXIST != lastError) {
// The service exists but we couldn't open it
LOG(("Could not open service. (%d)\n", GetLastError()));
return FALSE;
}
if (schService) {
// The service exists but it may not have the correct permissions.
// This could happen if the permissions were not set correctly originally
// or have been changed after the installation. This will reset the
// permissions back to allow limited user accounts.
if (!SetUserAccessServiceDACL(schService)) {
LOG(("Could not reset security ACE on service handle. It might not be "
"possible to start the service. This error should never "
"happen. (%d)\n", GetLastError()));
}
// The service exists and we opened it
DWORD bytesNeeded;
if (!QueryServiceConfigW(schService, NULL, 0, &bytesNeeded) &&
GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
LOG(("Could not determine buffer size for query service config. (%d)\n",
GetLastError()));
return FALSE;
}
// Get the service config information, in particular we want the binary
// path of the service.
nsAutoArrayPtr<char> serviceConfigBuffer = new char[bytesNeeded];
if (!QueryServiceConfigW(schService,
reinterpret_cast<QUERY_SERVICE_CONFIGW*>(serviceConfigBuffer.get()),
bytesNeeded, &bytesNeeded)) {
LOG(("Could open service but could not query service config. (%d)\n",
GetLastError()));
return FALSE;
}
QUERY_SERVICE_CONFIGW &serviceConfig =
*reinterpret_cast<QUERY_SERVICE_CONFIGW*>(serviceConfigBuffer.get());
// Check if we need to fix the service path
BOOL servicePathWasWrong;
static BOOL alreadyCheckedFixServicePath = FALSE;
if (!alreadyCheckedFixServicePath) {
if (!FixServicePath(schService, serviceConfig.lpBinaryPathName,
servicePathWasWrong)) {
LOG(("Could not fix service path. This should never happen. (%d)\n",
GetLastError()));
// True is returned because the service is pointing to
// maintenanceservice_tmp.exe so it actually was upgraded to the
// newest installed service.
return TRUE;
} else if (servicePathWasWrong) {
// Now that the path is fixed we should re-attempt the install.
// This current process' image path is maintenanceservice_tmp.exe.
// The service used to point to maintenanceservice_tmp.exe.
// The service was just fixed to point to maintenanceservice.exe.
// Re-attempting an install from scratch will work as normal.
alreadyCheckedFixServicePath = TRUE;
LOG(("Restarting install action: %d\n", action));
return SvcInstall(action);
}
}
// Ensure the service path is not quoted. We own this memory and know it to
// be large enough for the quoted path, so it is large enough for the
// unquoted path. This function cannot fail.
PathUnquoteSpacesW(serviceConfig.lpBinaryPathName);
// Obtain the existing maintenanceservice file's version number and
// the new file's version number. Versions are in the format of
// A.B.C.D.
DWORD existingA, existingB, existingC, existingD;
DWORD newA, newB, newC, newD;
BOOL obtainedExistingVersionInfo =
GetVersionNumberFromPath(serviceConfig.lpBinaryPathName,
existingA, existingB,
existingC, existingD);
if (!GetVersionNumberFromPath(newServiceBinaryPath, newA,
newB, newC, newD)) {
LOG(("Could not obtain version number from new path\n"));
return FALSE;
}
// Check if we need to replace the old binary with the new one
// If we couldn't get the old version info then we assume we should
// replace it.
if (ForceInstallSvc == action ||
!obtainedExistingVersionInfo ||
(existingA < newA) ||
(existingA == newA && existingB < newB) ||
(existingA == newA && existingB == newB &&
existingC < newC) ||
(existingA == newA && existingB == newB &&
existingC == newC && existingD < newD)) {
// We have a newer updater, so update the description from the INI file.
UpdateServiceDescription(schService);
schService.reset();
if (!StopService()) {
return FALSE;
}
if (!wcscmp(newServiceBinaryPath, serviceConfig.lpBinaryPathName)) {
LOG(("File is already in the correct location, no action needed for "
"upgrade. The path is: \"%ls\"\n", newServiceBinaryPath));
return TRUE;
}
BOOL result = TRUE;
// Attempt to copy the new binary over top the existing binary.
// If there is an error we try to move it out of the way and then
// copy it in. First try the safest / easiest way to overwrite the file.
if (!CopyFileW(newServiceBinaryPath,
serviceConfig.lpBinaryPathName, FALSE)) {
LOG(("Could not overwrite old service binary file. "
"This should never happen, but if it does the next upgrade will "
"fix it, the service is not a critical component that needs to be "
"installed for upgrades to work. (%d)\n", GetLastError()));
// We rename the last 3 filename chars in an unsafe way. Manually
// verify there are more than 3 chars for safe failure in MoveFileExW.
const size_t len = wcslen(serviceConfig.lpBinaryPathName);
if (len > 3) {
// Calculate the temp file path that we're moving the file to. This
// is the same as the proper service path but with a .old extension.
LPWSTR oldServiceBinaryTempPath =
new WCHAR[len + 1];
memset(oldServiceBinaryTempPath, 0, (len + 1) * sizeof (WCHAR));
wcsncpy(oldServiceBinaryTempPath, serviceConfig.lpBinaryPathName, len);
// Rename the last 3 chars to 'old'
wcsncpy(oldServiceBinaryTempPath + len - 3, L"old", 3);
// Move the current (old) service file to the temp path.
if (MoveFileExW(serviceConfig.lpBinaryPathName,
oldServiceBinaryTempPath,
MOVEFILE_REPLACE_EXISTING | MOVEFILE_WRITE_THROUGH)) {
// The old binary is moved out of the way, copy in the new one.
if (!CopyFileW(newServiceBinaryPath,
serviceConfig.lpBinaryPathName, FALSE)) {
// It is best to leave the old service binary in this condition.
LOG(("ERROR: The new service binary could not be copied in."
" The service will not be upgraded.\n"));
result = FALSE;
} else {
LOG(("The new service binary was copied in by first moving the"
" old one out of the way.\n"));
}
// Attempt to get rid of the old service temp path.
if (DeleteFileW(oldServiceBinaryTempPath)) {
LOG(("The old temp service path was deleted: %ls.\n",
oldServiceBinaryTempPath));
} else {
// The old temp path could not be removed. It will be removed
// the next time the user can't copy the binary in or on uninstall.
LOG(("WARNING: The old temp service path was not deleted.\n"));
}
} else {
// It is best to leave the old service binary in this condition.
LOG(("ERROR: Could not move old service file out of the way from:"
" \"%ls\" to \"%ls\". Service will not be upgraded. (%d)\n",
serviceConfig.lpBinaryPathName,
oldServiceBinaryTempPath, GetLastError()));
result = FALSE;
}
delete[] oldServiceBinaryTempPath;
} else {
// It is best to leave the old service binary in this condition.
LOG(("ERROR: Service binary path was less than 3, service will"
" not be updated. This should never happen.\n"));
result = FALSE;
}
} else {
LOG(("The new service binary was copied in.\n"));
}
// We made a copy of ourselves to the existing location.
// The tmp file (the process of which we are executing right now) will be
// left over. Attempt to delete the file on the next reboot.
if (MoveFileExW(newServiceBinaryPath, NULL, MOVEFILE_DELAY_UNTIL_REBOOT)) {
LOG(("Deleting the old file path on the next reboot: %ls.\n",
newServiceBinaryPath));
} else {
LOG(("Call to delete the old file path failed: %ls.\n",
newServiceBinaryPath));
}
return result;
}
// We don't need to copy ourselves to the existing location.
// The tmp file (the process of which we are executing right now) will be
// left over. Attempt to delete the file on the next reboot.
MoveFileExW(newServiceBinaryPath, NULL, MOVEFILE_DELAY_UNTIL_REBOOT);
// nothing to do, we already have a newer service installed
return TRUE;
}
// If the service does not exist and we are upgrading, don't install it.
if (UpgradeSvc == action) {
// The service does not exist and we are upgrading, so don't install it
return TRUE;
}
// Quote the path only if it contains spaces.
PathQuoteSpacesW(newServiceBinaryPath);
// The service does not already exist so create the service as on demand
schService.own(CreateServiceW(schSCManager, SVC_NAME, SVC_DISPLAY_NAME,
SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS,
SERVICE_DEMAND_START, SERVICE_ERROR_NORMAL,
newServiceBinaryPath, NULL, NULL, NULL,
NULL, NULL));
if (!schService) {
LOG(("Could not create Windows service. "
"This error should never happen since a service install "
"should only be called when elevated. (%d)\n", GetLastError()));
return FALSE;
}
if (!SetUserAccessServiceDACL(schService)) {
LOG(("Could not set security ACE on service handle, the service will not "
"be able to be started from unelevated processes. "
"This error should never happen. (%d)\n",
GetLastError()));
}
UpdateServiceDescription(schService);
return TRUE;
}
