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Function for list services on multiple servers

Answered Function for list services on multiple servers

  • Thursday, June 21, 2012 1:59 PM
     
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    Hi

    I'm trying to write function to list all services with status 'Auto' on multiple servers. For now i have that:

    Function running_services{
    Param(
    [Parameter(Mandatory=$true,
               ValueFromPipeline=$true,
               HelpMessage='Input path to the file with server list')]
    [ValidateScript({Test-Path $_ -PathType 'leaf'})]
    $input_patch
    ,
    [Parameter(Mandatory=$true,
               ValueFromPipeline=$true,
               HelpMessage='Input path to the file where result will be written')]
    [ValidateScript({
    Test-Path $_ -PathType 'leaf'
    })]
    $output_patch
    )
    $servers = Get-Content $input_patch
    
    foreach($s in $servers)
    {
        $service = Write-Output $s
        $service += gwmi win32_service -ComputerName $s | where {$_.startmode -eq "Auto"} | Select-Object name,state,status | sort state
    }
    $service | Out-File $output_patch
}

    and couple questions:

    1. I want to verify if output file exist if not create it so i made a:

    [Parameter(Mandatory=$true,
               ValueFromPipeline=$true,
               HelpMessage='Input path to the file where result will be written')]
    [ValidateScript({
    if(!(Test-Path $_ -PathType 'leaf')){new-item $output_patch -type file}
    })]
    $output_patch

    but when i try run got: running_services : Cannot validate argument on parameter 'output_patch'. Cannot bind argument to parameter 'Path' because it is null.r

    2. How to write the list to the file. Now it's not working, writing only host names.

     

All Replies

  • Saturday, June 23, 2012 9:49 PM
     
     Answered Has Code
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    1

    1. It won't work like that. You use proper variable for test, but for some reason - you do not for file creation... ;) Use $_ there too:

    function Test-MyPath {
param (
    [Parameter(Mandatory = $true)]
    [ValidateScript({
        if (!(Test-Path $_ -PathType Leaf)) {
            New-Item -ItemType File -Path $_ -Force
        }
    })]
    [string]$Path
)
    'Foo' | Add-Content @PSBoundParameters
}

    2. If you are building strings it may be a good idea to force output of command to become one:

    $S = 'localhost'

$service = Write-Output $s
$service += gwmi win32_service -ComputerName $s | 
    where {$_.startmode -eq "Auto"} | 
    Select-Object name,state,status | 
    sort state | Out-String