/// <summary>
/// Launches the service and then returns.
/// </summary>
public void LaunchService()
{
var hSCManager = NativeServiceWrapper.OpenSCManagerW(null, null, (uint)SCMPermissions.SC_MANAGER_ALL_ACCESS);
if (hSCManager == IntPtr.Zero)
{
var error = Marshal.GetLastWin32Error();
var errorMsg = "Error when opening SCM: " + error;
if (error == 0x5)
{
errorMsg = "Error when opening SCM: Access Denied. Please try again with administrator privileges.";
}
logger.Error("Launch service failed: " + errorMsg);
throw new Win32Exception(error, errorMsg);
}
try
{
LaunchService(hSCManager);
}
finally
{
NativeServiceWrapper.CloseServiceHandle(hSCManager);
}
}
private void ReportSvcStatus(CurrentState state, int exitCode, uint waitHint)
{
if (svcStatus.dwCurrentState == (uint)CurrentState.SERVICE_STOPPED)
{
return;
}
serviceCheckPoint = 1;
svcStatus.dwCurrentState = (uint)state;
svcStatus.dwWin32ExitCode = exitCode;
svcStatus.dwWaitHint = waitHint;
if (state == CurrentState.SERVICE_START_PENDING)
{
svcStatus.dwControlsAccepted = 0;
}
else
{
svcStatus.dwControlsAccepted = (uint)ControlsAccepted.SERVICE_ACCEPT_STOP;
}
if (state == CurrentState.SERVICE_RUNNING || state == CurrentState.SERVICE_STOPPED)
{
svcStatus.dwCheckPoint = 0;
}
else
{
svcStatus.dwCheckPoint = serviceCheckPoint++;
}
NativeServiceWrapper.SetServiceStatus(hSvcStatus, ref svcStatus);
}
/// <summary>
/// Called by SCM as the entry point of the service. Note that args
/// should come from the program main since SCM will launch us with
/// the args passed in like a normal command line program.
/// </summary>
/// <param name="argc">The number of arguments passed.</param>
/// <param name="argv">The string array of arguments.</param>
private void InitializeService(int argc, IntPtr argv)
{
logger.Info("Begin service initialization.");
hSvcStatus = NativeServiceWrapper.RegisterServiceCtrlHandlerExW(serviceName, svcCtrlHandler, IntPtr.Zero);
if (hSvcStatus == IntPtr.Zero)
{
var error = Marshal.GetLastWin32Error();
var errorMsg = "Could not register service control handler. Error: " + error;
logger.Error("Initialize service failed: " + errorMsg);
throw new Win32Exception(error, errorMsg);
}
ReportSvcStatus(CurrentState.SERVICE_START_PENDING, 0, 3000);
Thread.Sleep(30000);
var strArgs = "\"" + string.Join("\", \"", serviceArgs) + "\"";
logger.Info("Initializing service with arguments: " + strArgs);
var exitCode = 0;
try
{
startHandler(serviceArgs);
ReportSvcStatus(CurrentState.SERVICE_RUNNING, 0, 0);
logger.Info("Service started successfully.");
stopEvent.WaitOne();
}
catch (Exception e)
{
exitCode = -1;
ReportSvcStatus(CurrentState.SERVICE_STOPPED, exitCode, 0);
logger.Error("Exception thrown from service start handler: " + e.Message);
return;
}
logger.Info("Stopping service.");
ReportSvcStatus(CurrentState.SERVICE_STOP_PENDING, 0, 3000);
try
{
stopHandler();
}
catch (Exception e)
{
exitCode = -1;
logger.Error("Exception thrown from service stop handler: " + e.Message);
}
ReportSvcStatus(CurrentState.SERVICE_STOPPED, exitCode, 0);
logger.Info("Service stopped successfully.");
}
/// <summary>
/// Part of the service start workflow where the main function
/// calls this function to signal that the service is should start.
/// This function blocks until the service is stopped.
/// </summary>
public void StartService()
{
ServiceTableEntry[] dispatchTable = new ServiceTableEntry[2];
dispatchTable[0].serviceName = serviceName;
dispatchTable[0].serviceMainFunction = Marshal.GetFunctionPointerForDelegate(svcMain);
if (!NativeServiceWrapper.StartServiceCtrlDispatcherW(dispatchTable))
{
var error = Marshal.GetLastWin32Error();
var errorMsg = "Could not start the service. Error: " + error;
logger.Error("Start service control dispatcher failed: " + errorMsg);
throw new Win32Exception(error, errorMsg);
}
}
private void LaunchService(IntPtr hSCManager, IntPtr hService)
{
var svcArgs = serviceArgs ?? new string[0];
if (!NativeServiceWrapper.StartServiceW(hService, (uint)svcArgs.Length, svcArgs))
{
var error = Marshal.GetLastWin32Error();
if (error != (int)ServiceErrorCodes.ERROR_SERVICE_ALREADY_RUNNING)
{
var errorMsg = "Error when starting service: " + error;
logger.Error("Launch service failed: " + errorMsg);
throw new Win32Exception(error, errorMsg);
}
}
}
private void LaunchService(IntPtr hSCManager)
{
var hService = NativeServiceWrapper.OpenServiceW(hSCManager, serviceName, (uint)ServicePermissions.SERVICE_START);
if (hService == IntPtr.Zero)
{
var error = Marshal.GetLastWin32Error();
var errorMsg = "Could not open the existing service. Error: " + error;
logger.Error("Launch service failed: " + errorMsg);
throw new Win32Exception(error, errorMsg);
}
try
{
LaunchService(hSCManager, hService);
}
finally
{
NativeServiceWrapper.CloseServiceHandle(hService);
}
}
public void CreateService(bool start = true)
{
var hSCManager = IntPtr.Zero;
var hService = IntPtr.Zero;
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
var errorMsg = "Services can only be installed on Windows platforms.";
logger.Error("Create service failed: " + errorMsg);
throw new PlatformNotSupportedException();
}
try
{
hSCManager = NativeServiceWrapper.OpenSCManagerW(null, null, (uint)SCMPermissions.SC_MANAGER_ALL_ACCESS);
if (hSCManager == IntPtr.Zero)
{
var error = Marshal.GetLastWin32Error();
var errorMsg = "Error when opening SCM: " + error;
if (error == 0x5)
{
errorMsg = "Error when opening SCM: Access Denied. Please try again with administrator privileges.";
}
logger.Error("Create service failed: " + errorMsg);
throw new Win32Exception(error, errorMsg);
}
var serviceCmd = new StringBuilder();
serviceCmd.AppendFormat("\"{0}\"", binaryPath);
if (serviceArgs != null)
{
foreach (var arg in serviceArgs)
{
serviceCmd.Append(" ");
serviceCmd.Append(arg);
}
}
hService = NativeServiceWrapper.CreateServiceW(hSCManager, serviceName, displayName, (uint)ServicePermissions.SERVICE_ALL_ACCESS, serviceType, startType, errorSeverity, serviceCmd.ToString(), null, IntPtr.Zero, null, username, password);
if (hService == IntPtr.Zero)
{
var error = Marshal.GetLastWin32Error();
if (error != (int)ServiceErrorCodes.ERROR_SERVICE_EXISTS)
{
var errorMsg = "Create service failed with error: " + error;
logger.Error("Create service failed: " + errorMsg);
throw new Win32Exception(error, errorMsg);
}
hService = NativeServiceWrapper.OpenServiceW(hSCManager, serviceName, (uint)ServicePermissions.SERVICE_START);
if (hService == IntPtr.Zero)
{
error = Marshal.GetLastWin32Error();
var errorMsg = "Could not open the existing service. Error: " + error;
logger.Error("Create service failed: " + errorMsg);
throw new Win32Exception(error, errorMsg);
}
}
if (start)
{
LaunchService(hSCManager, hService);
}
}
finally
{
if (hService != IntPtr.Zero)
{
NativeServiceWrapper.CloseServiceHandle(hService);
}
if (hSCManager != IntPtr.Zero)
{
NativeServiceWrapper.CloseServiceHandle(hSCManager);
}
}
}
public void RemoveService()
{
var hSCManager = IntPtr.Zero;
var hService = IntPtr.Zero;
try
{
hSCManager = NativeServiceWrapper.OpenSCManagerW(null, null, (uint)SCMPermissions.SC_MANAGER_ALL_ACCESS);
if (hSCManager == IntPtr.Zero)
{
var error = Marshal.GetLastWin32Error();
var errorMsg = "Error when opening SCM: " + error;
if (error == 0x5)
{
errorMsg = "Error when opening SCM: Access Denied. Please try again with administrator privileges.";
}
logger.Error("Remove service failed: " + errorMsg);
throw new Win32Exception(error, errorMsg);
}
hService = NativeServiceWrapper.OpenServiceW(hSCManager, serviceName, (uint)ServicePermissions.SERVICE_DELETE | (uint)ServicePermissions.SERVICE_STOP);
if (hService == IntPtr.Zero)
{
var error = Marshal.GetLastWin32Error();
var errorMsg = "Could not open the service for removal. Error: " + error;
logger.Error("Remove service failed: " + errorMsg);
throw new Win32Exception(error, errorMsg);
}
ServiceStatus status = new ServiceStatus();
if (!NativeServiceWrapper.ControlService(hService, ServiceControls.SERVICE_CONTROL_STOP, ref status))
{
var error = Marshal.GetLastWin32Error();
if (error != (int)ServiceErrorCodes.ERROR_SERVICE_NOT_ACTIVE &&
error != (int)ServiceErrorCodes.ERROR_SERVICE_CANNOT_ACCEPT_CTRL &&
error != (int)ServiceErrorCodes.ERROR_SHUTDOWN_IN_PROGRESS)
{
var errorMsg = "Could not stop the service for removal. Error: " + error;
logger.Error("Remove service failed: " + errorMsg);
throw new Win32Exception(error, errorMsg);
}
}
if (!NativeServiceWrapper.DeleteService(hService))
{
var error = Marshal.GetLastWin32Error();
var errorMsg = "Could not delete the service. Error: " + error;
logger.Error("Remove service failed: " + errorMsg);
throw new Win32Exception(error, errorMsg);
}
}
finally
{
if (hService != IntPtr.Zero)
{
NativeServiceWrapper.CloseServiceHandle(hService);
}
if (hSCManager != IntPtr.Zero)
{
NativeServiceWrapper.CloseServiceHandle(hSCManager);
}
}
}
