Public/Utils/Set-SimpleAcl.ps1
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function Set-SimpleAcl { <# .SYNOPSIS Sets a simple ACL rule for given Path. .DESCRIPTION Returns true if an access rule has been added. False if it was already present. .EXAMPLE Set-SimpleAcl -Path 'c:\test' -User 'Everyone' -Permission 'FullControl' -Type 'Allow' #> [Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSAvoidDefaultValueSwitchParameter', '')] [CmdletBinding(SupportsShouldProcess = $true)] [OutputType([bool])] param( [Parameter(Mandatory=$true)] [string] $Path, [Parameter(Mandatory=$true)] [string] $User, [Parameter(Mandatory=$true)] [string] [ValidateSet('FullControl', 'Modify', 'ReadAndExecute', 'ListDirectory', 'Read', 'Write')] $Permission, [Parameter(Mandatory=$true)] [string] [ValidateSet('Allow', 'Deny')] $Type, [Parameter(Mandatory=$false)] [switch] $Inherit = $true ) # see http://stackoverflow.com/questions/7984876/powershell-how-to-get-whatif-to-propagate-to-cmdlets-in-another-module :( $whatIf = Test-WhatIf if (!(Test-Path -Path $Path)) { if ($PSCmdlet.ShouldProcess('Directory', "Add permission '$Permission' to item '$Path' (if it exists) for user '$User'") -and !$whatIf) { throw "Item '$Path' does not exist." } return $true } $acl = (Get-Item -Path $path).GetAccessControl('Access') if ($Inherit) { $inheritArg = @([System.Security.AccessControl.InheritanceFlags]::ContainerInherit,[System.Security.AccessControl.InheritanceFlags]::ObjectInherit) } else { $inheritArg = @([System.Security.AccessControl.InheritanceFlags]::None) } $userRegex = $User -replace '\\', '\\' $existingEntry = $acl.Access.Where({ $_.IdentityReference.Value -imatch $userRegex -and $_.FileSystemRights -imatch $Permission -and $_.AccessControlType -ieq $Type }) if ($existingEntry -and $existingEntry.InheritanceFlags -eq $inheritArg) { Write-Log -_Debug "ACL on '$Path' already matches desired value ('$Type' user '$User', permission '$Permission', inherit $Inherit)" return $false } $propagation = [System.Security.AccessControl.PropagationFlags]::None if ($PSCmdlet.ShouldProcess('Directory', "Add permission '$Permission' to item '$Path' for user '$User'") -and !$whatIf) { Write-Log -Info "Setting ACL on '$Path' - '$Type' user '$User', permission '$Permission', inherit $Inherit" $accessRule = New-Object -TypeName System.Security.AccessControl.FileSystemAccessRule -ArgumentList $User, $Permission, $inheritArg, $propagation, $Type $acl.AddAccessRule($accessRule) Set-Acl -Path $Path -AclObject $acl } return $true } |