MiniLab

0.8.6

Private/FixNTVirtualMachinesPerms.ps1

                                <#

    The function uses the NTFSSecurity Module to set "ReadAndExecute, Synchronize" permissions

    for the "NT VIRTUAL MACHINE\Virtual Machines" account on:

        - The specified $Directory,

        - All child items of $Directory via "ThisFolderSubFoldersAndFiles"; and

        - All Parent Directories of $Directory via "ThisFolderOnly" up to the root drive.

#>

function FixNTVirtualMachinesPerms {

    [CmdletBinding()]

    Param (

        [Parameter(Mandatory=$True)]

        [string]$DirectoryPath

    )

    ##### BEGIN Variable/Parameter Transforms and PreRun Prep #####

    if (! $(Test-Path $DirectoryPath)) {

        Write-Error "The path $DirectoryPath was not found! Halting!"

        $global:FunctionResult = "1"

        return

    }

    if ($(Get-Module).Name -notcontains "PackageManagement") {

        try {

            $PMImport = Import-Module PackageManagement -ErrorAction SilentlyContinue -PassThru

            if (!$PMImport) {throw "Problem importing module PackageManagement!"}

        }

        catch {

            Write-Error $_

            $global:FunctionResult = "1"

            return

        }

    }

    if ($(Get-Module).Name -notcontains "PowerShellGet") {

        try {

            $PSGetImport = Import-Module PowerShellGet -ErrorAction SilentlyContinue -PassThru

            if (!$PSGetImport) {throw "Problem importing module PowerShellGet!"}

        }

        catch {

            Write-Error $_

            $global:FunctionResult = "1"

            return

        }

    }

    if ($(Get-Module -ListAvailable).Name -notcontains "NTFSSecurity") {

        try {

            Install-Module -Name NTFSSecurity -ErrorAction SilentlyContinue -ErrorVariable NTFSSecInstallErr

            if ($NTFSSecInstallErr) {throw "Problem installing the NTFSSecurity Module!"}

        }

        catch {

            Write-Error $_

            $global:FunctionResult = "1"

            return

        }

    }

    if ($(Get-Module).Name -notcontains "NTFSSecurity") {

        try {

            $NTFSSecImport = Import-Module NTFSSecurity -ErrorAction SilentlyContinue -PassThru

            if (!$NTFSSecImport) {throw "Problem importing module NTFSSecurity!"}

        }

        catch {

            Write-Error $_

            $global:FunctionResult = "1"

            return

        }

    }

    ##### END Variable/Parameter Transforms and PreRun Prep #####

    ##### BEGIN Main Body #####

    $NTFSAccessInfo = Get-NTFSAccess $DirectoryPath

    $NTFSAccessInfoVMs = $NTFSAccessInfo | Where-Object {$_.Account -eq "NT VIRTUAL MACHINE\Virtual Machines"}

    if ($NTFSAccessInfoVMs) {

        # TODO: Figure out the appropriate way to get the 'AppliesTo' Properties. The below works, but is bad.

        $NTFSAccessInfoVMsContent = $($NTFSAccessInfoVMs| Out-String) -split "`n"

        $NTFSAccessInfoHeaders = $NTFSAccessInfoVMsContent -match '-------'

        $IndexNumber = $NTFSAccessInfoVMsContent.Indexof("$NTFSAccessInfoHeaders")

        $AppliesToPrep = $NTFSAccessInfoVMsContent[$($IndexNumber+1)..$($NTFSAccessInfoVMsContent.Count-1)] | Where-Object {$_ -match "[\w]"}

        [System.Collections.ArrayList][Array]$AppliesTo = $($($($AppliesToPrep | foreach {$_ -replace "[\s]+"," "}) -split "(Allow|Deny)[\s](True|False)")[0].Trim() -split " ")[-1]

    }

    # NOTE: The below string "ThisFolderSubfolders" is not the full setting (i.e. "ThisFolderSubfoldersAndFiles").

    # I match on an incomplete string versus using the '-contains' comparison operator because I don't know the

    # appropriate way of getting the  'Applies To' property from Get-NTFSAccess output. See the above 'TODO:' comment.

    if ($NTFSAccessInfo.Account -notcontains "NT VIRTUAL MACHINE\Virtual Machines" -or

    $($NTFSAccessInfo.Account -contains "NT VIRTUAL MACHINE\Virtual Machines" -and ![bool]$($AppliesTo -match "ThisFolderSubfolders"))

    ) {

        Add-NTFSAccess -Path $DirectoryPath -Account "NT VIRTUAL MACHINE\Virtual Machines" -AccessRights "ReadAndExecute, Synchronize" -AccessType Allow -AppliesTo ThisFolderSubfoldersAndFiles

    }

    $ParentDirThatNeedsPermissions = $DirectoryPath | Split-Path -Parent

    while (-not [System.String]::IsNullOrEmpty($ParentDirThatNeedsPermissions)) {

        $NTFSAccessInfo = Get-NTFSAccess $ParentDirThatNeedsPermissions

        $NTFSAccessInfoVMs = $NTFSAccessInfo | Where-Object {$_.Account -eq "NT VIRTUAL MACHINE\Virtual Machines"}

        if ($NTFSAccessInfoVMs) {

            $NTFSAccessInfoVMsContent = $($NTFSAccessInfoVMs| Out-String) -split "`n"

            $NTFSAccessInfoHeaders = $NTFSAccessInfoVMsContent -match '-------'

            $IndexNumber = $NTFSAccessInfoVMsContent.Indexof("$NTFSAccessInfoHeaders")

            $AppliesToPrep = $NTFSAccessInfoVMsContent[$($IndexNumber+1)..$($NTFSAccessInfoVMsContent.Count-1)] | Where-Object {$_ -match "[\w]"}

            [System.Collections.ArrayList][Array]$AppliesTo = $($($($AppliesToPrep | foreach {$_ -replace "[\s]+"," "}) -split "(Allow|Deny)[\s](True|False)")[0].Trim() -split " ")[-1]

        }

        if ($NTFSAccessInfo.Account -notcontains "NT VIRTUAL MACHINE\Virtual Machines" -or

        $($NTFSAccessInfo.Account -contains "NT VIRTUAL MACHINE\Virtual Machines" -and ![bool]$($AppliesTo -match "ThisFolderOnly"))

        ) {

            Add-NTFSAccess -Path $ParentDirThatNeedsPermissions -Account "NT VIRTUAL MACHINE\Virtual Machines" -AccessRights "ReadAndExecute, Synchronize" -AccessType Allow -AppliesTo ThisFolderOnly

        }

        $ParentDirThatNeedsPermissions = $ParentDirThatNeedsPermissions | Split-Path -Parent

    }

    ##### END Main Body #####

}

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# SIG # End signature block