Powershell - Enter-PSSession
lazarus / 34-Windows

----------------------------------------------------------------------
HomeBoy38 · 2023-10-17 10:19

Hello,

I have a TAsyncProcess [poNoConsole, poStdErrToOutput, poUsePipes]
which executes
'C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe'.

The procedure ReadData reads the Output into a TStringList until I get
back the PowerShell prompt.

I had no issue when executing all the commands I needed, my
TStringList was correctly filled with my powershell commands outputs,
except sometimes. Those commands were remotely sent to other machines,
so, in order to be more effective, I decided to change my code to open
a remote session (Enter-PSSession) and input my commands directly on
th machine.

Once the Enter-PSSession is done, I correctly have the remote
powershell prompt, I see the command I run but no more output, just
the prompt back. No error message, no command result.

If I manually open a powershell, enter-pssession and input my
commands, the output is ok.

Anyone has an idea why I loose my commands outputs once under Enter-
PSSession?

Thanks

----------------------------------------------------------------------
marcov · 2023-10-17 10:40

There was a strange case with powertoys PSEXEC once. But it was on the
input side.

Try to set  poPassInput and see if that helps.

----------------------------------------------------------------------
HomeBoy38 · 2023-10-17 12:18

I tried poPassInput, but in that case, I do not catch anything anymore
(I have not investigated why)

EDIT: I changed one of the commands.
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i s := 'Get-
CimInstance -ClassName Win32_ComputerSystem | Out-File -FilePath
.\Process.txt' + LineEnding; 

The Process.txt file is created on the remote computer, so I am sure I
am on the computer when executing my command.
The Process.txt file is... empty! So I am still wondering what happend
to my command output?

EDIT2: I have no idea why but after a Enter-PSSession, if I run my
commands with "invoke-command", the output is back to my TAsyncProcess
Code: Pascal  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i s :=
'Invoke-Command {Get-CimInstance -ClassName Win32_ComputerSystem}' +
LineEnding;as an example

So far, so good

I think I solved my issue, maybe it can help anyone else, but I leave
the thread unsolved if someone has the explanation on this (maybe a
powershell thing, I am not too expert in it)

EDIT3: new issue found, if the application is minimized, the
powershell commands are failing somehow, I still have not investigate
why  :'(

EDIT4: end of story? I found the EDIT3 issue: when my application is
minimized, the powershell command issued is split onto several lines,
so by handling this, I can handle my result. Really strange behaviors
with powershell