Modification de la configuration d’un service

Un programme de configuration de service utilise les fonctions ChangeServiceConfig et ChangeServiceConfig2 pour modifier les paramètres de configuration d’un service installé. Le programme ouvre un handle pour l’objet de service, modifie sa configuration, puis ferme le handle de l’objet de service.

Dans l’exemple suivant, la fonction DoDisableSvc utilise ChangeServiceConfig pour modifier le type de démarrage du service sur « Désactivé », la fonction DoEnableSvc utilise ChangeServiceConfig pour remplacer le type de démarrage du service sur « Enabled », et la fonction DoUpdateSvcDesc utilise ChangeServiceConfig2 pour définir la description du service sur « Il s’agit d’une description de test ». La variable szSvcName est une variable globale qui contient le nom du service. Pour obtenir l’exemple complet qui définit cette variable, consultez SvcConfig.cpp.

//
// Purpose: 
//   Disables the service.
//
// Parameters:
//   None
// 
// Return value:
//   None
//
VOID __stdcall DoDisableSvc()
{
    SC_HANDLE schSCManager;
    SC_HANDLE schService;

    // Get a handle to the SCM database. 
 
    schSCManager = OpenSCManager( 
        NULL,                    // local computer
        NULL,                    // ServicesActive database 
        SC_MANAGER_ALL_ACCESS);  // full access rights 
 
    if (NULL == schSCManager) 
    {
        printf("OpenSCManager failed (%d)\n", GetLastError());
        return;
    }

    // Get a handle to the service.

    schService = OpenService( 
        schSCManager,            // SCM database 
        szSvcName,               // name of service 
        SERVICE_CHANGE_CONFIG);  // need change config access 
 
    if (schService == NULL)
    { 
        printf("OpenService failed (%d)\n", GetLastError()); 
        CloseServiceHandle(schSCManager);
        return;
    }    

    // Change the service start type.

    if (! ChangeServiceConfig( 
        schService,        // handle of service 
        SERVICE_NO_CHANGE, // service type: no change 
        SERVICE_DISABLED,  // service start type 
        SERVICE_NO_CHANGE, // error control: no change 
        NULL,              // binary path: no change 
        NULL,              // load order group: no change 
        NULL,              // tag ID: no change 
        NULL,              // dependencies: no change 
        NULL,              // account name: no change 
        NULL,              // password: no change 
        NULL) )            // display name: no change
    {
        printf("ChangeServiceConfig failed (%d)\n", GetLastError()); 
    }
    else printf("Service disabled successfully.\n"); 

    CloseServiceHandle(schService); 
    CloseServiceHandle(schSCManager);
}

//
// Purpose: 
//   Enables the service.
//
// Parameters:
//   None
// 
// Return value:
//   None
//
VOID __stdcall DoEnableSvc()
{
    SC_HANDLE schSCManager;
    SC_HANDLE schService;

    // Get a handle to the SCM database. 
 
    schSCManager = OpenSCManager( 
        NULL,                    // local computer
        NULL,                    // ServicesActive database 
        SC_MANAGER_ALL_ACCESS);  // full access rights 
 
    if (NULL == schSCManager) 
    {
        printf("OpenSCManager failed (%d)\n", GetLastError());
        return;
    }

    // Get a handle to the service.

    schService = OpenService( 
        schSCManager,            // SCM database 
        szSvcName,               // name of service 
        SERVICE_CHANGE_CONFIG);  // need change config access 
 
    if (schService == NULL)
    { 
        printf("OpenService failed (%d)\n", GetLastError()); 
        CloseServiceHandle(schSCManager);
        return;
    }    

    // Change the service start type.

    if (! ChangeServiceConfig( 
        schService,            // handle of service 
        SERVICE_NO_CHANGE,     // service type: no change 
        SERVICE_DEMAND_START,  // service start type 
        SERVICE_NO_CHANGE,     // error control: no change 
        NULL,                  // binary path: no change 
        NULL,                  // load order group: no change 
        NULL,                  // tag ID: no change 
        NULL,                  // dependencies: no change 
        NULL,                  // account name: no change 
        NULL,                  // password: no change 
        NULL) )                // display name: no change
    {
        printf("ChangeServiceConfig failed (%d)\n", GetLastError()); 
    }
    else printf("Service enabled successfully.\n"); 

    CloseServiceHandle(schService); 
    CloseServiceHandle(schSCManager);
}

//
// Purpose: 
//   Updates the service description to "This is a test description".
//
// Parameters:
//   None
// 
// Return value:
//   None
//
VOID __stdcall DoUpdateSvcDesc()
{
    SC_HANDLE schSCManager;
    SC_HANDLE schService;
    SERVICE_DESCRIPTION sd;
    LPTSTR szDesc = TEXT("This is a test description");

    // Get a handle to the SCM database. 
 
    schSCManager = OpenSCManager( 
        NULL,                    // local computer
        NULL,                    // ServicesActive database 
        SC_MANAGER_ALL_ACCESS);  // full access rights 
 
    if (NULL == schSCManager) 
    {
        printf("OpenSCManager failed (%d)\n", GetLastError());
        return;
    }

    // Get a handle to the service.

    schService = OpenService( 
        schSCManager,            // SCM database 
        szSvcName,               // name of service 
        SERVICE_CHANGE_CONFIG);  // need change config access 
 
    if (schService == NULL)
    { 
        printf("OpenService failed (%d)\n", GetLastError()); 
        CloseServiceHandle(schSCManager);
        return;
    }    

    // Change the service description.

    sd.lpDescription = szDesc;

    if( !ChangeServiceConfig2(
        schService,                 // handle to service
        SERVICE_CONFIG_DESCRIPTION, // change: description
        &sd) )                      // new description
    {
        printf("ChangeServiceConfig2 failed\n");
    }
    else printf("Service description updated successfully.\n");

    CloseServiceHandle(schService); 
    CloseServiceHandle(schSCManager);
}

Rubriques connexes

Configuration de service

Exemple de service complet