Want use only SimpleSC with admin rights

Hello,

i have a nsis file with the setting

RequestExecutionLevel user

but I want to start a windows service. I use NSIS Simple Service Plugin for it.

So I want that the UAC request will come only if I try to start a service. Is this possible? And if could you give me a hint, please?

A process cannot elevate itself after it has been started.

The easy way is to create another mini installer that does the elevated operation. You must start it with ExecShell[Wait] when required.

But How do I get the return code then?

    ExecShell "open" "file.exe" SW_HIDE

I will show more code. Because the return code looks very randomly.

This is my nsis file which I want to execute with admin permissions.

;======================================================

; General



Name "Start service wlansvc"

OutFile "start_wlansvc.exe"



RequestExecutionLevel admin



;======================================================

; Functions



Function .onInit

  ; SilentInstall silent



  ; start wlansvc

  SimpleSC::StartService "wlansvc" "" 30



FunctionEnd



;======================================================

; Sections



Section

  SetAutoClose true



SectionEnd

And then I use this in my main nsis file

StrCpy $1 "start_wlansvc.exe" ; File to execute

	System::Call '*(&l4, i ${SEE_MASK_NOCLOSEPROCESS}, p$HWNDPARENT, p0, tr1, p0, p0, p5, p0, p0, p0, p0, p0, p0, p)p.r1'

	System::Call 'SHELL32::ShellExecuteEx(t)i.r0 (pr1)' ; (t) is a hint for A/W detection

	${If} $0 <> 0

	    System::Call '*$1(i, i, p, p, p, p, p, p, p, p, p, p, p, p, p.r0)'

	    System::Call 'KERNEL32::WaitForSingleObject(p r0, i ${INFINITE})'

	    System::Call 'KERNEL32::GetExitCodeProcess(p r0 s,*i.r0)'

	    System::Call 'KERNEL32::CloseHandle(p s)'

	    DetailPrint ExitCode=$0

	${EndIf}

	MessageBox MB_OK $0

	MessageBox MB_OK $1

	System::Free $1

I think the problem is that the first nsis file returns the wrong return code. I tried this, but doesn't helps

  SimpleSC::StartService "wlansvc" "" 30



  Pop $0

  Pop $1 

  ${If} $0 == 0

    ${If} $1 == 0

      SetErrorLevel 4

    ${EndIf}

  ${Else}

    SetErrorLevel 4

  ${EndIf}

The ShellExecute code works correctly and is not random as far as I can tell:

Section
System::Call '*(&l4, i ${SEE_MASK_NOCLOSEPROCESS}, p$HWNDPARENT, p0, t "cmd.exe", t "/c exit /b 666", p0, p5, p0, p0, p0, p0, p0, p0, p)p.r1'
System::Call 'SHELL32::ShellExecuteEx(t)i.r0 (pr1)' ; (t) is a hint for A/W detection
${If} $0 <> 0
    System::Call '*$1(i, i, p, p, p, p, p, p, p, p, p, p, p, p, p.r0)'
    System::Call 'KERNEL32::WaitForSingleObject(p r0, i ${INFINITE})'
    System::Call 'KERNEL32::GetExitCodeProcess(p r0 s,*i.r0)'
    System::Call 'KERNEL32::CloseHandle(p s)'
    MessageBox mb_ok ExitCode=$0 ; 666 every time
${EndIf}
System::Free $1
SectionEnd 

$1 will be "random" be cause it is a memory address but you don't need to look at it, just free it.

You can use Process Monitor from SysInternals to verify the exit code of start_wlansvc.exe.

Yes, this works with cmd.exe, but not with the nsis exe file "start_wlansvc.exe" which I showed at my last post.

Section
SetErrorLevel 4
GetErrorLevel $0
MessageBox mb_ok ErrorLevel=$0
Quit
SectionEnd 

Process exit code is 4, confirmed by Process Monitor.