How to capture the Return Value of a ScriptBlock invoked with Powershell's Invoke-Command

Question

My question is very similar to this one, except I'm trying to capture the return code of a ScriptBlock using Invoke-Command (so I can't use the -FilePath option). Here's my code:

Invoke-Command -computername $server {\\fileserver\script.cmd $args} -ArgumentList $args exit $LASTEXITCODE 

The problem is that Invoke-Command doesn't capture the return code of script.cmd, so I have no way of knowing if it failed or not. I need to be able to know if script.cmd failed.

I tried using a New-PSSession as well (which lets me see script.cmd's return code on the remote server) but I can't find any way to pass it back to my calling Powershell script to actually DO anything about the failure.

Answer 1

$remotesession = new-pssession -computername localhost invoke-command -ScriptBlock { cmd /c exit 2} -Session $remotesession $remotelastexitcode = invoke-command -ScriptBlock { $lastexitcode} -Session $remotesession $remotelastexitcode # will return 2 in this example 

1. Create a new session using new-pssession
2. Invoke your scripblock in this session
3. Fetch the lastexitcode from this session

Answer 2

$script = {     # Call exe and combine all output streams so nothing is missed     $output = ping badhostname *>&1      # Save lastexitcode right after call to exe completes     $exitCode = $LASTEXITCODE      # Return the output and the exitcode using a hashtable     New-Object -TypeName PSCustomObject -Property @{Host=$env:computername; Output=$output; ExitCode=$exitCode} }  # Capture the results from the remote computers $results = Invoke-Command -ComputerName host1, host2 -ScriptBlock $script  $results | select Host, Output, ExitCode | Format-List 

Host : HOST1
Output : Ping request could not find host badhostname. Please check the name and try again
ExitCode : 1

Host : HOST2
Output : Ping request could not find host badhostname. Please check the name and try again.
ExitCode : 1