CODEWITHSUNDEEP
powershell
AlanDev1989
AlanDev1989

Reputation: 85

Using an If Statement with a Piping Command

I'm completely new to using PowerShell and computer programming in general. I'm trying to create a script that kills a process(firefox in this case) if it exceeds a working set of 10mb. I would like to do this using an if statement and also having a piping command included. So far I have this:

get-process|where-object {$_.ProcessName -eq"firefox"}

if ($_.WorkingSet -gt10000000)
      {kill}
else
       {"This process is not using alot of the computers resources"}

Can anyone help to fix this? Even though firefox is exceeding 10MB working set, the else statement is always reproduced.

Upvotes: 1

Views: 715

Answers (2)

Shay Levy
Shay Levy

Reputation: 126842

You can filter the process in question by using the Name parameter (no need to use Where-Object for this purpose) then pipe the objects to the Stop-Process cmdlet. Notice the -WhatIf switch, it shows what would happen if the cmdlet runs (the cmdlet is not run). Remove it to execute the cmdlet.

Get-Process -Name firefox | 
Where-Object {$_.WorkingSet -gt 10mb} | 
Stop-Process -WhatIf

Upvotes: 3

Ansgar Wiechers
Ansgar Wiechers

Reputation: 200373

You need to wrap the conditional in a loop:

Get-Process | ? { $_.ProcessName -eq 'firefox' } | % {
  if ($_.WorkingSet -gt 10MB) {
    kill $_
  } else {
    "This process is not using alot of the computers resources"
  }
}

Otherwise the conditional would be evaluated independently from the pipeline, which means that the current object variable ($_) would be empty at that point.

Upvotes: 4

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