# from http://mspowershell.blogspot.com/2008/07/locked-file-detection.html

function testFileLock {

## Attempts to open a file and trap the resulting error if the file is already open/locked

param ([string]$filePath )

$filelocked = $false

$fileInfo = New-Object System.IO.FileInfo $filePath

trap {

Set-Variable -name locked -value $true -scope 1

continue

}

$fileStream = $fileInfo.Open( [System.IO.FileMode]::OpenOrCreate, [System.IO.FileAccess]::ReadWrite, [System.IO.FileShare]::None )

if ($fileStream) {

$fileStream.Close()

}

$obj = New-Object Object

$obj | Add-Member Noteproperty FilePath -value $filePath

$obj | Add-Member Noteproperty IsLocked -value $filelocked

$obj

}

$files = gci "$env:TEMP"

$locked = @()

foreach ($f in $files){

if(testFileLock $f){

$locked += $f

}

}

Write-Host "The following files are locked."

Write-Host $locked