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From:	Bill Stewart <bstewart AT iname DOT com>
Date:	Thu, 23 Jan 2020 10:44:21 -0700
Message-ID:	<CANV9t=RWS9udBWsfETtKbVNfdkNJNht2qq7-KFTnRpFE2gmnFw@mail.gmail.com>
Subject:	Windows Restart Manager and cygrunsrv services
To:	cygwin AT cygwin DOT com
X-IsSubscribed:	yes

Good day,

Application installers (such as Windows Installer or Inno Setup) can
use the Windows Restart Manager APIs[1] it to determine if a program
or service is running, and automatically stop/restart as appropriate.

This is useful when reinstalling or upgrading a service from an
installer, as the installer itself can stop the service, replace the
binary/binaries, and restart the service automatically.

However it seems that when running a service using cygrunsrv, the
Restart Manager RmGetList API[2] returns RmRebootReasonSessionMismatch
(2) for the lpdwRebootReasons output parameter.

This parameter return value is one of the RM_REBOOT_REASON enumeration
values[3].

The description for the RmRebootReasonSessionMismatch value on MSDN is
as follows: "One or more processes are running in another Terminal
Services session."

I ran into this building an Inno Setup installer. I reproduced on
Windows 10 x64 and Windows Server 2008 R2 x64.

The error description is interesting, because in neither repro case
were there other users logged on using TS sessions. (I'm not sure if
that error description is completely accurate in describing all cases
where that value gets returned, though...)

Unexpected behavior: Restart Manager returns 2
(RmRebootReasonSessionMismatch) in the lpdwRebootReasons output
parameter when calling the RmGetList API to detect a cygrunsrv
service.

Expected behavior: Restart Manager should return 0
(RmRebootReasonNone) in the lpdwRebootReasons output parameter when
calling the RmGetList API to detect a cygrunsrv service.

Further details (regarding Inno Setup and this problem):
https://groups.google.com/d/msg/innosetup/9dAT3wB9RTQ/99Py-ZgLCgAJ

Any ideas why Restart Manager doesn't work for cygrunsrv services?

Thanks!

Bill

____________________

[1] https://docs.microsoft.com/en-us/windows/win32/rstmgr/about-restart-manager

[2] https://docs.microsoft.com/en-us/windows/win32/api/restartmanager/nf-restartmanager-rmgetlist

[3] https://docs.microsoft.com/en-us/windows/win32/api/restartmanager/ne-restartmanager-rm_reboot_reason

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