Catch error from calling another program

[perlnewbie9292]

Hello,

I'm a complete newbie to powershell. I'm trying to catch the output of the command that I'm calling, which is pscp binary. I would like to check for errors returned when the binary is executed. Depending on the error I would like to trigger an event, like attempt to re-transfer the file(s) that returned the error or just run through all the files again. Right now if I print $status it appears to be blank/null.

$windowsLogPath = "C:\files\uploads"
$unixLogPath = "/var/[URL unfurl="true"]www/uploads"[/URL]
$privKey = "c:\keys\key"
$pscp = "C:\pscp.exe -r -scp -i " + $privKey	
$user = "uploader"
$remoteServer = "xx.xx.xx.xx"

function run-SCP
{	
	try 
	{
        $runCommandConstr = $pscp + " " + $windowsLogPath+ "/*" + " " + $user+"@"+ $remoteServer + ":" + $unixLogPath	
		Invoke-Expression $runCommandConstr	
	}
	catch 
	{
  		[system.exception]
  		"caught a system exception"
	}
}


$status = run-SCP


if ($status -eq "True") 
{
	"Copy completed successfully"
}
else
{
	"Copy failed, will attempt to run the command again"	
	$retry = run-SCP
	if ( $retry -eq "True")
	{
		"Second attempt successful
	}
	else 
	{
		"Failed, aborting"
	}
}

I also tried just capturing the exit status like below, then checking for that. But it's not an accurate result b/c it will return true even if the transfer wasn't successful.

Invoke-Expression $runCommandConstr
$status = $?

My question is how do I actually capture if any of the transfers failed or if there was a problem either due to permissions or access denied or timeout etc... All of which are reported when the command "$runCommandConstr" is executed. I just need to be able to capture that output and add some error logic to what is returned.

Thanks for the help in advanced.

 

[58sniper]

What does $error contain?

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