Yathosho
7th July 2011 16:03 UTC

RunAsAdmin
if i'm not mistaken, i cannot use the UAC plugin to have an installer in user mode execute a file as admin. is there any other way this can be done? the executed program would ideally request admin rights from the user first.

i came across this, not sure if this is a possible solution. anyway, i would prefer not having to use the registry for such a simple task.

MSG
7th July 2011 16:17 UTC

To ExecWait an exe as admin, see here: http://forums.winamp.com/showthread.php?t=287227
I guess to Exec without Wait you can just call shellexecuteex without worrying about process handles.

(I found it by using the search function. Keyword 'admin', search in titles only, show results as threads, NSIS forum only.)

(Note: Running an exe As Admin will ALWAYS require the user to enter credentials. It would be bad if you could just run something as admin without the admin password!)

Yathosho
7th July 2011 17:50 UTC

i guess i'd have to make a system call? i have no idea how these work. anyone who could provide a reallife example please?

Afrow UK
8th July 2011 12:25 UTC

Best way (if possible) is for the program itself to request administrator privileges using a requestExecutionLevel manifest and code to test the current user is an administrator.

Stu

Yathosho
30th July 2011 23:29 UTC

so now i'm using ShellExecWait and it does the job for ExecWait.

however, i looking for the same to perform a simple Exec. i commented the following portion of the code and it works as desired.

${If} $1 <> 0
        System::Call '*$0(is,i,i,i,i,i,i,i,i,i,i,i,i,i,i.r1)' ;stack value not really used, just a fancy pop ;)
        System::Call 'kernel32::WaitForSingleObject(ir1,i-1)'
        System::Call 'kernel32::GetExitCodeProcess(ir1,*i.s)'
        System::Call 'kernel32::CloseHandle(ir1)'
${EndIf}

Afrow UK
31st July 2011 10:12 UTC

If you don't need to wait for the process to exit, you don't want SEE_MASK_NOCLOSEPROCESS (0x00000040) for the 2nd member (fMask) of the SHELLEXECUTEINFO struct.

Stu

Anders
31st July 2011 19:22 UTC

Why make this more complicated than it has to be? To perform a ShellExecute without waiting you can just use the ExecShell command...