private static void ChangeInteractiveStateInternal(IntPtr serviceHandle, Boolean makeInteractive)
{
UInt32 bytesNeaded = 0;
if (!WindowsServiceNativeMethods.QueryServiceConfig(serviceHandle, IntPtr.Zero, 0, out bytesNeaded) && Marshal.GetLastWin32Error() != WindowsServiceNativeConstants.ERROR_INSUFFICIENT_BUFFER)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
var ptrBuffer = IntPtr.Zero;
ptrBuffer = Marshal.AllocHGlobal((Int32)bytesNeaded);
if (!WindowsServiceNativeMethods.QueryServiceConfig(serviceHandle, ptrBuffer, bytesNeaded, out bytesNeaded))
{
if (ptrBuffer != IntPtr.Zero)
{
Marshal.FreeHGlobal(ptrBuffer);
}
throw new Win32Exception(Marshal.GetLastWin32Error());
}
var serviceConf = (QUERY_SERVICE_CONFIG)Marshal.PtrToStructure(ptrBuffer, typeof(QUERY_SERVICE_CONFIG));
if (ptrBuffer != IntPtr.Zero)
{
Marshal.FreeHGlobal(ptrBuffer);
}
if (serviceConf.lpServiceStartName != ServiceAccount.LocalSystem.ToString())
{
if (!WindowsServiceNativeMethods.ChangeServiceConfig(serviceHandle, WindowsServiceNativeConstants.SERVICE_NO_CHANGE, WindowsServiceNativeConstants.SERVICE_NO_CHANGE, WindowsServiceNativeConstants.SERVICE_NO_CHANGE, null, null, IntPtr.Zero, null, ServiceAccount.LocalSystem.ToString(), String.Empty, null))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
serviceConf.dwServiceType = makeInteractive ? serviceConf.dwServiceType | WindowsServiceNativeConstants.SERVICE_INTERACTIVE_PROCESS : serviceConf.dwServiceType & ~WindowsServiceNativeConstants.SERVICE_INTERACTIVE_PROCESS;
if (!WindowsServiceNativeMethods.ChangeServiceConfig(serviceHandle, serviceConf.dwServiceType, WindowsServiceNativeConstants.SERVICE_NO_CHANGE, WindowsServiceNativeConstants.SERVICE_NO_CHANGE, null, null, IntPtr.Zero, null, null, null, null))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
private static void ChangeService(String serviceName, Boolean setDescription, Boolean makeInteractive, String serviceDescription)
{
IntPtr handleScm = WindowsServiceNativeMethods.OpenSCManager(null, null, (UInt32)SCM_ACCESS.SC_MANAGER_ALL_ACCESS);
if (handleScm == IntPtr.Zero)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
try
{
IntPtr handleService = WindowsServiceNativeMethods.OpenService(handleScm, serviceName, (Int32)(SERVICE_ACCESS.SERVICE_QUERY_CONFIG | SERVICE_ACCESS.SERVICE_CHANGE_CONFIG));
if (handleService != IntPtr.Zero)
{
try
{
if (setDescription)
{
ChangeDescriptionInternal(handleService, serviceDescription);
}
ChangeInteractiveStateInternal(handleService, makeInteractive);
}
finally
{
WindowsServiceNativeMethods.CloseServiceHandle(handleService);
}
}
else
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
finally
{
WindowsServiceNativeMethods.CloseServiceHandle(handleScm);
}
}
private static void ChangeDescriptionInternal(IntPtr serviceHandle, String serviceDescription)
{
var serviceDescrition = new SERVICE_DESCRIPTION();
serviceDescrition.lpDescription = serviceDescription;
var ptrDescription = IntPtr.Zero;
try
{
ptrDescription = Marshal.AllocHGlobal(Marshal.SizeOf(serviceDescrition));
Marshal.StructureToPtr(serviceDescrition, ptrDescription, false);
if (!WindowsServiceNativeMethods.ChangeServiceConfig2(serviceHandle, WindowsServiceNativeConstants.SERVICE_CONFIG_DESCRIPTION, ptrDescription))
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
finally
{
if (ptrDescription != IntPtr.Zero)
{
Marshal.FreeHGlobal(ptrDescription);
}
}
}
