Why aren't error thrown when I run this function as domain administrator? - powershell

Question

This script is intended to recurse through a series of directories and when an error of type DirUnauthorizedAccessError,Microsoft or PowerShell.Commands.GetChildItemCommand is thrown it's supposed to call another function Take-Ownership which takes ownership of the directory and adds full permissions for the localAdmin and domain admin to the folder. (It's really a script used for easing the deletion of old user profiles):
function Test-Folder($FolderToTest, $localAdminName) {
# Remeber the old error preference...
$old_ErrorActionPreference = $ErrorActionPreference
$ErrorActionPreference = 'SilentlyContinue'
$error.Clear()
# Go through the directories...and capture errors in $error
Get-ChildItem $FolderToTest -Recurse -ErrorAction SilentlyContinue -ErrorVariable errz | Select FullName
Write-Host $errz.count
if ($errz.Count -eq 0) {
Write-Host "blah no errors"
foreach ($err in $errz) {
Write-Host "Error: $err"
if ($err.FullyQualifiedErrorId -eq "DirUnauthorizedAccessError,Microsoft.PowerShell.Commands.GetChildItemCommand") {
Write-Host Unable to access $err.TargetObject -Fore Red
Write-Host Attempting to take ownership of $err.TargetObject -Fore Yellow
Take-Ownership -Folder $err.TargetObject, -LocalAdminName $localAdminName
Test-Folder -FolderToTest $err.TargetObject -localAdminName $localAdminName
}
}
}
$ErrorActionPreference = $old_ErrorActionPreference
}
Unfortunately, it doesn't throw any errors when I run it as domain administrator. I've found a list of ErrorActionPreferences here, but the errors just seem to get ignored, and it outputs blah no errors What can I do to make sure I receive errors and that my Take-Ownership function is actually called?

Answer 1

Your code only enters the if block if $errz.Count is 0. With a count of 0 there are no elements in $errz, so there's nothing to do for the foreach loop.
Add an else branch to the conditional, move the foreach loop there, and the code should do what you want.
if ($errz.Count -eq 0) {
Write-Host "blah no errors"
} else {
foreach ($err in $errz) {
Write-Host "Error: $err"
...
}
}