{"id":494,"date":"2008-07-18T07:32:24","date_gmt":"2008-07-18T15:32:24","guid":{"rendered":"http:\/\/www.sapien.com\/blog\/?p=494"},"modified":"2008-07-18T07:43:59","modified_gmt":"2008-07-18T15:43:59","slug":"clean-temp-with-powershell","status":"publish","type":"post","link":"https:\/\/dev.sapien.com\/blog\/2008\/07\/18\/clean-temp-with-powershell\/","title":{"rendered":"Clean Temp With PowerShell"},"content":{"rendered":"

You would think that by now Windows and Windows applications would be much better about cleaning up temporary files. But no.  It is amazing how many files I still see in my %TEMP% directory.  I’ve always operated under the assumption that any file in %TEMP% that was created or earlier than the time I last booted up is fair game for deletion. I finally got around to using PowerShell for this management task.<\/p>\n

I developed a script called Clean-Temp.ps1 that deletes all files in my %TEMP% directory including subfolders, if the last modified time is older than my last boot time.<\/p>\n

\n
\n
   1:<\/span> Function Remove-File {<\/pre>\n
   2:<\/span> #-Recurse will search through all subfolders<\/span><\/pre>\n
   3:<\/span> #-hidden will the -force parameter for Get-ChildItem<\/span><\/pre>\n
   4:<\/span> #-force will use the -force parameter with Remove-Item<\/span><\/pre>\n
   5:<\/span>  <\/pre>\n
   6:<\/span>     Param([string]$path=$env:temp,<\/pre>\n
   7:<\/span>           [datetime]$cutoff=$(Throw "You must enter a cutoff date!"<\/span>),<\/pre>\n
   8:<\/span>           [Switch]$Recurse,<\/pre>\n
   9:<\/span>           [Switch]$hidden,<\/pre>\n
  10:<\/span>           [Switch]$force)<\/pre>\n
  11:<\/span>     <\/pre>\n
  12:<\/span>     Write-Host "Removing files in $path older than $cutoff"<\/span> -foregroundcolor CYAN<\/pre>\n
  13:<\/span>         <\/pre>\n
  14:<\/span>     $cmd="Get-ChildItem $path"<\/span><\/pre>\n
  15:<\/span>     <\/pre>\n
  16:<\/span>     if<\/span> ($recurse) {<\/pre>\n
  17:<\/span>         $cmd=$cmd + " -recurse"<\/span><\/pre>\n
  18:<\/span>     }<\/pre>\n
  19:<\/span>     <\/pre>\n
  20:<\/span>     if<\/span> ($hidden) {<\/pre>\n
  21:<\/span>         $cmd=$cmd + " -force"<\/span><\/pre>\n
  22:<\/span>     }<\/pre>\n
  23:<\/span>     <\/pre>\n
  24:<\/span>     #create an array to store file information<\/span><\/pre>\n
  25:<\/span>     $files=@()<\/pre>\n
  26:<\/span>     <\/pre>\n
  27:<\/span>     # execute the command string filtering out directories<\/span><\/pre>\n
  28:<\/span>     &$executioncontext.InvokeCommand.NewScriptBlock($cmd) | <\/pre>\n
  29:<\/span>     where {-not $_.PSIsContainer -and $_.lastwritetime -lt<\/span> $cutoff} | <\/pre>\n
  30:<\/span>      foreach<\/span> {<\/pre>\n
  31:<\/span>         #add current file to array<\/span><\/pre>\n
  32:<\/span>         $files+=$_<\/pre>\n
  33:<\/span>         <\/pre>\n
  34:<\/span>         if<\/span> ($force) {<\/pre>\n
  35:<\/span>         #YOU MUST REMOVE -WHATIF TO ACTUALLY DELETE FILES<\/span><\/pre>\n
  36:<\/span>             Remove-Item $_.fullname -force -WHATIF<\/pre>\n
  37:<\/span>             }<\/pre>\n
  38:<\/span>         else<\/span> {<\/pre>\n
  39:<\/span>             Remove-Item $_.fullname -WHATIF<\/pre>\n
  40:<\/span>             }     <\/pre>\n
  41:<\/span>     } #end forEach<\/span><\/pre>\n
  42:<\/span>     <\/pre>\n
  43:<\/span>     $stats=$files | Measure-Object -Sum length<\/pre>\n
  44:<\/span>     $msg="Attempted to delete {0} files for a total of {1} MB ({2} bytes)"<\/span> -f <\/pre>\n
  45:<\/span>     $stats.count,($stats.sum\/1MB -as [int]),$stats.sum<\/pre>\n
  46:<\/span>     <\/pre>\n
  47:<\/span>     Write-Host $msg -foregroundcolor CYAN<\/pre>\n
  48:<\/span>  <\/pre>\n
  49:<\/span> }<\/pre>\n
  50:<\/span>  <\/pre>\n
  51:<\/span> $query="Select LastBootUpTime from Win32_OperatingSystem"<\/span><\/pre>\n
  52:<\/span> $boot=Get-WmiObject -query $query<\/pre>\n
  53:<\/span> [datetime]$boottime=$boot.ConvertToDateTime($boot.Lastbootuptime)<\/pre>\n
  54:<\/span>  <\/pre>\n
  55:<\/span> Remove-File $env:temp $boottime -recurse -hidden -force<\/pre>\n
  56:<\/span>  <\/pre>\n<\/div>\n<\/div>\n