/// Used by the GetServicesInGroup method.
private ServiceController(string machineName, Interop.mincore.ENUM_SERVICE_STATUS_PROCESS status)
{
if (!CheckMachineName(machineName))
{
throw new ArgumentException(SR.Format(SR.BadMachineName, machineName));
}
_machineName = machineName;
_name = status.serviceName;
_displayName = status.displayName;
_commandsAccepted = status.controlsAccepted;
_status = (ServiceControllerStatus)status.currentState;
_type = status.serviceType;
_statusGenerated = true;
}
/// Helper for GetDevices, GetServices, and ServicesDependedOn
private static T[] GetServices <T>(string machineName, int serviceType, string group, Func <Interop.mincore.ENUM_SERVICE_STATUS_PROCESS, T> selector)
{
IntPtr databaseHandle = IntPtr.Zero;
IntPtr memory = IntPtr.Zero;
int bytesNeeded;
int servicesReturned;
int resumeHandle = 0;
T[] services;
try
{
databaseHandle = GetDataBaseHandleWithEnumerateAccess(machineName);
Interop.mincore.EnumServicesStatusEx(
databaseHandle,
Interop.mincore.ServiceControllerOptions.SC_ENUM_PROCESS_INFO,
serviceType,
Interop.mincore.StatusOptions.STATUS_ALL,
IntPtr.Zero,
0,
out bytesNeeded,
out servicesReturned,
ref resumeHandle,
group);
memory = Marshal.AllocHGlobal((IntPtr)bytesNeeded);
//
// Get the set of services
//
Interop.mincore.EnumServicesStatusEx(
databaseHandle,
Interop.mincore.ServiceControllerOptions.SC_ENUM_PROCESS_INFO,
serviceType,
Interop.mincore.StatusOptions.STATUS_ALL,
memory,
bytesNeeded,
out bytesNeeded,
out servicesReturned,
ref resumeHandle,
group);
//
// Go through the block of memory it returned to us and select the results
//
services = new T[servicesReturned];
for (int i = 0; i < servicesReturned; i++)
{
IntPtr structPtr = (IntPtr)((long)memory + (i * Marshal.SizeOf <Interop.mincore.ENUM_SERVICE_STATUS_PROCESS>()));
Interop.mincore.ENUM_SERVICE_STATUS_PROCESS status = new Interop.mincore.ENUM_SERVICE_STATUS_PROCESS();
Marshal.PtrToStructure(structPtr, status);
services[i] = selector(status);
}
}
finally
{
Marshal.FreeHGlobal(memory);
if (databaseHandle != IntPtr.Zero)
{
Interop.mincore.CloseServiceHandle(databaseHandle);
}
}
return(services);
}
private unsafe void GenerateNames()
{
if (_machineName.Length == 0)
{
throw new ArgumentException(SR.NoMachineName);
}
IntPtr databaseHandle = IntPtr.Zero;
IntPtr memory = IntPtr.Zero;
int bytesNeeded;
int servicesReturned;
int resumeHandle = 0;
try
{
databaseHandle = GetDataBaseHandleWithEnumerateAccess(_machineName);
Interop.mincore.EnumServicesStatusEx(
databaseHandle,
Interop.mincore.ServiceControllerOptions.SC_ENUM_PROCESS_INFO,
Interop.mincore.ServiceTypeOptions.SERVICE_TYPE_WIN32,
Interop.mincore.StatusOptions.STATUS_ALL,
IntPtr.Zero,
0,
out bytesNeeded,
out servicesReturned,
ref resumeHandle,
null);
memory = Marshal.AllocHGlobal(bytesNeeded);
Interop.mincore.EnumServicesStatusEx(
databaseHandle,
Interop.mincore.ServiceControllerOptions.SC_ENUM_PROCESS_INFO,
Interop.mincore.ServiceTypeOptions.SERVICE_TYPE_WIN32,
Interop.mincore.StatusOptions.STATUS_ALL,
memory,
bytesNeeded,
out bytesNeeded,
out servicesReturned,
ref resumeHandle,
null);
// Since the service name of one service cannot be equal to the
// service or display name of another service, we can safely
// loop through all services checking if either the service or
// display name matches the user given name. If there is a
// match, then we've found the service.
for (int i = 0; i < servicesReturned; i++)
{
IntPtr structPtr = (IntPtr)((long)memory + (i * Marshal.SizeOf <Interop.mincore.ENUM_SERVICE_STATUS_PROCESS>()));
Interop.mincore.ENUM_SERVICE_STATUS_PROCESS status = new Interop.mincore.ENUM_SERVICE_STATUS_PROCESS();
Marshal.PtrToStructure(structPtr, status);
if (string.Equals(_eitherName, status.serviceName, StringComparison.OrdinalIgnoreCase) ||
string.Equals(_eitherName, status.displayName, StringComparison.OrdinalIgnoreCase))
{
if (_name == null)
{
_name = status.serviceName;
}
if (_displayName == null)
{
_displayName = status.displayName;
}
_eitherName = string.Empty;
return;
}
}
throw new InvalidOperationException(SR.Format(SR.NoService, _eitherName, _machineName));
}
finally
{
Marshal.FreeHGlobal(memory);
if (databaseHandle != IntPtr.Zero)
{
Interop.mincore.CloseServiceHandle(databaseHandle);
}
}
}
