Logout/logoff or signout user is not working with window service

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I am facing issue with logoff/logout/signout user trough the window service. I have tried 4 different ways but its not working. It is working fine when I am debugging the service but when I am creating a setup of service and running it then its not working.

Its very urgent, please help me!!

What I have tried:

Process.Start("shutdown", "-l");

ProcessStartInfo info = new ProcessStartInfo();
                info.FileName = "shutdown";
                info.Arguments = "-l";
info.WindowStyle = ProcessWindowStyle.Hidden;
                Process p = Process.Start(info);
                p.WaitForExit();

if (!WTSDisconnectSession(WTS_CURRENT_SERVER_HANDLE, 
                                 WTS_CURRENT_SESSION, false))
                                throw new Win32Exception();

ExitWindowsEx(0, 0);

Posted 20-Jul-17 23:48pm

Dharminder Gupta

Updated 24-Jul-17 9:04am

v3

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Richard MacCutchan 21-Jul-17 6:49am

Doesn't look urgent to me.

Athos7 24-Jul-17 14:12pm

The problem is likely that while you are debugging this, it is running in the user context (you in this case) when running as a service ... its probably running as system or likewise. Hard to tell without more info.

Thx

Dave Kreskowiak 24-Jul-17 14:46pm

No, that's exactly what's going on. Since the LocalSystem cannot log itself off, ... well it's not going to work.

Kornfeld Eliyahu Peter 24-Jul-17 14:32pm

Check your event log - you may find the answer there...

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OriginalGriff · Answer 1 · 2017-07-24T08:37:00

You can't do it: the service does not run under a user account - which is why you can't display anything to a user: no user, no user interface.
So shutdown -l looks at the current user that the service operates as, doesn't find one, and does nothing.

It works in debug because debugging a service is a special case, with a lot of care needed: How to: Debug Windows Service Applications[^]

Basically, you can't force a user logoff from a service directly. If your servioce has admin rights however you can - in theory, I've not tried it - do it: c# - Logoff interactive users in Windows from a service - Stack Overflow[^]
But be careful. And either backup really well before you install the service for testign, or use a VM.
And don't bring your app anywhere near my PC! :laugh:

Athos7 · Answer 2 · 2017-07-24T09:04:00

A service running as local system has the permission to do this.. 
Your task involves finding a list of logged on users : CMD
<pre>query user

Then that outputs something like this:

C++

PS C:\Users\Athos7> query user
 USERNAME              SESSIONNAME        ID  STATE   IDLE TIME  LOGON TIME
>Athos7            console             2  Active      none   7/24/2017 2:50 PM
PS C:\Users\Athos7>

Then you can just log off that session using the id:

logoff 2

You can also use findstr to only get the line with matching users ID

Or
This guy has a pretty nice PS script to turn the properties into an object. and you could either convert it or call it from your service.
Quick-Hits: Find currently logged on users | Learn Powershell | Achieve More[^]

Good Luck

Logout/logoff or signout user is not working with window service

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