Can I return an exit code %errorlevel% from WSL Bash to Powershell or Command Prompt?

Question

I have a bash script that returns exit 0 or exit 1 depending on conditions. That bash script is called from a Windows Powershell that does remoting. I test the %errorlevel% in the command prompt but it does not return the proper value!

remoteexecute.ps1

param (
    [Parameter(Mandatory=$true,HelpMessage="Remote computer")]
    [String]$computer, 
    
    [Parameter(Mandatory=$true,HelpMessage="Command to be executed on the remote computer")]
    [String]$command, 
)

    $message = "Executing: '" + $command + "' on remote computer " + $computer
    Write-Host $message
   
    $session = New-PSSession -ComputerName $computer
    Invoke-Command -Session $session -ScriptBlock ([scriptblock]::Create($command))
    $returncode=Invoke-Command -Session $session -ScriptBlock { $? }
    Remove-PSSession $session
         
    if ($returncode -eq $true) {
        return 0    
        exit 0
    }
    else {
        return 1
        exit 1
    }
        
}

powershell -file RemoteExecute.ps1 -computer "myServer" -command "bash -c './somescript.sh'"

Executing: bash -c './somescript.sh' on remote computer myServer


ERROR. Aborted!
exit 1

C:\Windows\system32>echo %errorlevel%
0

Have you see this ? More specifically this answer. As you're using -command, PowerShell will not return you directly an exit code but only fail or success. — Zilog80
– Zilog80, Commented Jul 13, 2021 at 12:27
Hi @zilog80. Powershell script is returning the proper exit code. — Rui Claro
– Rui Claro, Commented Jul 13, 2021 at 13:32
IIRC PowerShell's -File parameter doesn't return the exit code correctly. Try replacing with a properly quoted -Command (or -EncodedCommand) as a workaround. — Bill_Stewart
– Bill_Stewart, Commented Jul 13, 2021 at 14:16
@Bill_Stewart both with -File and -Command I get the same results — Rui Claro
– Rui Claro, Commented Jul 13, 2021 at 14:34
The display of exit 1 in your output is curious. The exit keyword should be treated as a statement here, not a [String] return value. It's the exact output ? — Zilog80
– Zilog80, Commented Jul 13, 2021 at 14:47

Rui Claro · Accepted Answer · 2021-08-11 08:57:54Z

0

Solved. Just changed the $? to $lastexitcode and returned that variable

$returncode=Invoke-Command -Session $session -ScriptBlock { $lastexitcode }
Remove-PSSession $session
     
exit $returncode

edited Aug 11, 2021 at 8:57

answered Jul 13, 2021 at 14:47

Rui Claro

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cama · Accepted Answer · 2024-10-02 08:28:37Z

0

A more simple example would be:

Invoke-Expression -Command 'bash script.sh'
$success = Invoke-Expression -Command '$lastexitcode'
Write-Host $success

answered Oct 2, 2024 at 8:28

cama

514 bronze badges

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