private Win32ServiceControlHandle OpenService(
Win32ServiceControlHandle serviceControlManagerHandle,
string name)
{
var serviceHandle = Win32ServiceControl.OpenService(
serviceControlManagerHandle,
name,
Win32ServiceControl.SERVICE_ACCESS.SERVICE_ALL_ACCESS);
if (serviceHandle.IsInvalid)
{
ThrowNewWin32Exception(
"Failed to get a handle on '{0}' on {1}.",
name,
this.hostName);
}
return(serviceHandle);
}
/// <summary>
/// Hack method without having to impersonate admin user.
/// </summary>
internal static bool IsServiceInstalled(string hostName, string serviceName)
{
using (var scmHandle = OpenServiceControlManager(hostName, Win32ServiceControl.SCM_ACCESS.SC_MANAGER_CONNECT))
{
if (scmHandle.IsInvalid)
{
throw new Win32Exception();
}
using (
var serviceHandle = Win32ServiceControl.OpenService(
scmHandle,
serviceName,
Win32ServiceControl.SERVICE_ACCESS.SERVICE_QUERY_STATUS))
{
if (!serviceHandle.IsInvalid)
{
return(true);
}
var win32Exception = new Win32Exception();
switch (win32Exception.NativeErrorCode)
{
case 5: // Access is denied, but that means it very likely exists!
return(true);
case 1060: // The specified service does not exist as an installed service
return(false);
default:
throw win32Exception;
}
}
}
}
