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/****************************** Module Header ******************************\
* Module Name: ServiceInstaller.cpp
* Project: CppWindowsService
* Copyright (c) Microsoft Corporation.
*
* The file implements functions that install and uninstall the service.
*
* This source is subject to the Microsoft Public License.
* See http://www.microsoft.com/en-us/openness/resources/licenses.aspx#MPL.
* All other rights reserved.
*
* THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND,
* EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.
\***************************************************************************/
#pragma region "Includes"
#include <stdio.h>
#include <windows.h>
#include "ServiceInstaller.h"
#pragma endregion
//
// FUNCTION: InstallService
//
// PURPOSE: Install the current application as a service to the local
// service control manager database.
//
// PARAMETERS:
// * pszServiceName - the name of the service to be installed
// * pszDisplayName - the display name of the service
// * dwStartType - the service start option. This parameter can be one of
// the following values: SERVICE_AUTO_START, SERVICE_BOOT_START,
// SERVICE_DEMAND_START, SERVICE_DISABLED, SERVICE_SYSTEM_START.
// * pszDependencies - a pointer to a double null-terminated array of null-
// separated names of services or load ordering groups that the system
// must start before this service.
// * pszAccount - the name of the account under which the service runs.
// * pszPassword - the password to the account name.
//
// NOTE: If the function fails to install the service, it prints the error
// in the standard output stream for users to diagnose the problem.
//
std::string InstallService(PSTR pszServiceName,
PSTR pszDisplayName,
DWORD dwStartType,
PSTR pszDependencies,
PSTR pszAccount,
PSTR pszPassword)
{
std::string ret;
char szPathTmp[MAX_PATH],szPath[MAX_PATH];
SC_HANDLE schSCManager = NULL;
SC_HANDLE schService = NULL;
if (GetModuleFileName(NULL, szPathTmp, ARRAYSIZE(szPath)) == 0)
{
ret = "GetModuleFileName failed, unable to get path to self";
goto Cleanup;
}
// Quote path in case it contains spaces
_snprintf_s(szPath,sizeof(szPath),"\"%s\"",szPathTmp);
// Open the local default service control manager database
schSCManager = OpenSCManager(NULL, NULL, SC_MANAGER_CONNECT |
SC_MANAGER_CREATE_SERVICE);
if (schSCManager == NULL)
{
ret = "OpenSCManager failed";
goto Cleanup;
}
// Install the service into SCM by calling CreateService
schService = CreateService(
schSCManager, // SCManager database
pszServiceName, // Name of service
pszDisplayName, // Name to display
SERVICE_QUERY_STATUS, // Desired access
SERVICE_WIN32_OWN_PROCESS, // Service type
dwStartType, // Service start type
SERVICE_ERROR_NORMAL, // Error control type
szPath, // Service's binary
NULL, // No load ordering group
NULL, // No tag identifier
pszDependencies, // Dependencies
pszAccount, // Service running account
pszPassword // Password of the account
);
if (schService == NULL)
{
ret = "CreateService failed";
goto Cleanup;
}
Cleanup:
// Centralized cleanup for all allocated resources.
if (schSCManager)
{
CloseServiceHandle(schSCManager);
schSCManager = NULL;
}
if (schService)
{
CloseServiceHandle(schService);
schService = NULL;
}
return ret;
}
//
// FUNCTION: UninstallService
//
// PURPOSE: Stop and remove the service from the local service control
// manager database.
//
// PARAMETERS:
// * pszServiceName - the name of the service to be removed.
//
// NOTE: If the function fails to uninstall the service, it prints the
// error in the standard output stream for users to diagnose the problem.
//
std::string UninstallService(PSTR pszServiceName)
{
std::string ret;
SC_HANDLE schSCManager = NULL;
SC_HANDLE schService = NULL;
SERVICE_STATUS ssSvcStatus = {};
// Open the local default service control manager database
schSCManager = OpenSCManager(NULL, NULL, SC_MANAGER_CONNECT);
if (schSCManager == NULL)
{
ret = "OpenSCManager failed";
goto Cleanup;
}
// Open the service with delete, stop, and query status permissions
schService = OpenService(schSCManager, pszServiceName, SERVICE_STOP |
SERVICE_QUERY_STATUS | DELETE);
if (schService == NULL)
{
ret = "OpenService failed (is service installed?)";
goto Cleanup;
}
// Try to stop the service
if (ControlService(schService, SERVICE_CONTROL_STOP, &ssSvcStatus))
{
Sleep(500);
while (QueryServiceStatus(schService, &ssSvcStatus))
{
if (ssSvcStatus.dwCurrentState == SERVICE_STOP_PENDING)
{
Sleep(500);
}
else break;
}
}
// Now remove the service by calling DeleteService.
if (!DeleteService(schService))
{
ret = "DeleteService failed (is service running?)";
goto Cleanup;
}
Cleanup:
// Centralized cleanup for all allocated resources.
if (schSCManager)
{
CloseServiceHandle(schSCManager);
schSCManager = NULL;
}
if (schService)
{
CloseServiceHandle(schService);
schService = NULL;
}
return ret;
}
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