asked on

Powershell Try and Catch.

Dear expert

See script code below:

$serverlist = Get-Content -Path 'c:\Scripts\serverlistOP.txt'
try{
foreach ($server in $serverlist) {
$server
query user /server:$server
}
}
catch{
"$Server do not have users"
}

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Error return like this:
query : No User exists for *
At line:5 char:1
+ query user /server:$server
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (No User exists for *:String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError

And this:
query : Error 0x000006BA enumerating sessionnames
At line:5 char:1
+ query user /server:$server
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (Error 0x000006B...ng sessionnames:String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError

Error [1722]:The RPC server is unavailable.
the RPC error in catch, I would like to show in catch message, RPC is unavailable, and query : No User exists for * I want to show text: No users currently login now.

How do I corret show those?

Thanks

ste5an

query does not return an error you can catch. It returns text. So you need to pack this into a variable and parse it.

Take also a look at Get-UserSession.

WeTi

ASKER

The get-usersession worked well, but there is no easier way? It seems alot of codes.

WeTi

ASKER

I would like to if it found a return text with begin of the line: No User exist return only this line to show

oBdA

Based on my function in https://www.experts-exchange.com/questions/29151406/Powershell-Parsing-quser-command.html

Function Get-UserSession {
[CmdletBinding()]
Param(
	[Parameter(Position=0, ValueFromPipeline=$true)]
	[String[]]$ComputerName = $ENV:ComputerName
)
	Process {
		$ComputerName | ForEach-Object {
			Try {
				Write-Verbose "Processing $($_) ..."
				$out = [ordered]@{}
				$out['ComputerName'] = $_
				$out['IPAddress'] = ([System.Net.Dns]::GetHostAddresses($_) | Where-Object {$_.AddressFamily -eq 'InterNetwork'})[0].IPAddressToString
				$output = & 'C:\Windows\system32\query.exe' user /server:$_
				If ($output -like '*No User exists*') {
					Write-Warning "[$($_)] $($output -join ' ')"
				} ElseIf ($output -like '*Error*') {
					Throw "[$($_)] $($output -join ' ')"
				} Else {
					$output |
						Select-Object -Skip 1 |
						Where-Object {$_ -match '(?<Current>.)(?<UserName>.{20})(?<SessionName>.{16})(?<ID>.{7})(?<State>.{8})\s+(?<IdleTime>\S+)\s+(?<LogonTime>.*)'} |
							ForEach-Object {
								ForEach ($prop in 'UserName', 'SessionName', 'ID', 'State', 'IdleTime', 'LogonTime') {$out[$prop] = $Matches[$prop].Trim()}
								[PSCustomObject]$out
							}
				}
			} Catch {
				$PSCmdlet.WriteError($_)
			}
		}
	}
}

$serverlist = Get-Content -Path 'c:\Scripts\serverlistOP.txt'
$serverlist | Get-UserSession

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WeTi

ASKER

ok still the question is how to handle errors:

query.exe : No User exists for *
At line:14 char:15
+                 $output = & 'C:\Windows\system32\query.exe' user /server:$_
+                           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (No User exists for *:String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError
 
query.exe : No User exists for *
At line:14 char:15
+                 $output = & 'C:\Windows\system32\query.exe' user /server:$_
+                           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (No User exists for *:String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError
 
query.exe : Error 0x000006BA enumerating sessionnames
At line:14 char:15
+                 $output = & 'C:\Windows\system32\query.exe' user /server:$_
+                           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (Error 0x000006B...ng sessionnames:String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError
 
Error [1722]:The RPC server is unavailable.
query.exe : Error 0x000006BA enumerating sessionnames
At line:14 char:15
+                 $output = & 'C:\Windows\system32\query.exe' user /server:$_
+                           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (Error 0x000006B...ng sessionnames:String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError
 
Error [1722]:The RPC server is unavailable.

Open in new window

The code is shorter now, and with $serverlist | Get-UserSession | ft Can i see the list better.

ASKER CERTIFIED SOLUTION

oBdA

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WeTi

ASKER

Wonderful thanks again, "-ErrorAction SilentlyContinue Im not going to need it, cause it ignored also those no user logged messages.