dsc/ext/Grani/GraniResource.3.7.8.3/DSCResources/Grani_SymbolicLink/Grani_SymbolicLink.psm1
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#region Initialize function Initialize { # Enum for Ensure Add-Type -TypeDefinition @" public enum EnsureType { Present, Absent } "@ -ErrorAction SilentlyContinue # GetSymbolicLink Class $GetSymLink = @' private const int FILE_SHARE_READ = 1; private const int FILE_SHARE_WRITE = 2; private const int CREATION_DISPOSITION_OPEN_EXISTING = 3; private const int FILE_FLAG_BACKUP_SEMANTICS = 0x02000000; [DllImport("kernel32.dll", EntryPoint = "GetFinalPathNameByHandleW", CharSet = CharSet.Unicode, SetLastError = true)] public static extern int GetFinalPathNameByHandle(IntPtr handle, [In, Out] StringBuilder path, int bufLen, int flags); [DllImport("kernel32.dll", EntryPoint = "CreateFileW", CharSet = CharSet.Unicode, SetLastError = true)] public static extern SafeFileHandle CreateFile(string lpFileName, int dwDesiredAccess, int dwShareMode, IntPtr SecurityAttributes, int dwCreationDisposition, int dwFlagsAndAttributes, IntPtr hTemplateFile); public static string GetSymbolicLinkTarget(System.IO.DirectoryInfo symlink) { SafeFileHandle directoryHandle = CreateFile(symlink.FullName, 0, 2, System.IntPtr.Zero, CREATION_DISPOSITION_OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, System.IntPtr.Zero); if (directoryHandle.IsInvalid) throw new Win32Exception(Marshal.GetLastWin32Error()); StringBuilder path = new StringBuilder(512); int size = GetFinalPathNameByHandle(directoryHandle.DangerousGetHandle(), path, path.Capacity, 0); if (size < 0) throw new Win32Exception(Marshal.GetLastWin32Error()); // The remarks section of GetFinalPathNameByHandle mentions the return being prefixed with "\\?\" // More information about "\\?\" here -> http://msdn.microsoft.com/en-us/library/aa365247(v=VS.85).aspx if (path[0] == '\\' && path[1] == '\\' && path[2] == '?' && path[3] == '\\') return path.ToString().Substring(4); else return path.ToString(); } '@ $getMemberParam = @{ Name = "SymbolicLinkGet" Namespace = "GraniResource" UsingNameSpace = "System.Text", "Microsoft.Win32.SafeHandles", "System.ComponentModel" MemberDefinition = $GetSymLink ErrorAction = "SilentlyContinue" PassThru = $true } $SymbolicLinkGet = Add-Type @getMemberParam | where Name -eq $getMemberParam.Name | %{$_ -as [Type]} # SetSymbolicLink Class $SetSymLink = @' internal static class Win32 { [DllImport("kernel32.dll", SetLastError = true)] [return: MarshalAs(UnmanagedType.I1)] public static extern bool CreateSymbolicLink(string lpSymlinkFileName, string lpTargetFileName, SymLinkFlag dwFlags); internal enum SymLinkFlag { File = 0, Directory = 1 } } public static void CreateSymLink(string name, string target, bool isDirectory = false) { if (!Win32.CreateSymbolicLink(name, target, isDirectory ? Win32.SymLinkFlag.Directory : Win32.SymLinkFlag.File)) { throw new System.ComponentModel.Win32Exception(); } } '@ $setMemberParam = @{ Name = "SymbolicLinkSet" Namespace = "GraniResource" MemberDefinition = $SetSymLink ErrorAction = "SilentlyContinue" PassThru = $true } $SymbolicLinkSet = Add-Type @setMemberParam | where Name -eq $setMemberParam.Name | %{$_ -as [Type]} } . Initialize #endregion #region Message Definition $verboseMessages = Data { ConvertFrom-StringData -StringData @" CreateSymbolicLink = DestinationPath : '{0}', SourcePath : '{1}', IsDirectory : '{2}' RemovingDestinationPath = Removing reparse point (Symbolic Link) '{0}'. "@ } $debugMessages = Data { ConvertFrom-StringData -StringData @" SourceAttributeDetectReparsePoint = Attribute detected as ReparsePoint. : {0} SourceAttributeNotDetectReparsePoint = Attribute detected as NOT ReparsePoint. : {0} SourceDirectoryDetected = Input object : '{0}' detected as Directory. SourceFileDetected = Input object : '{0}' detected as File. DestinationFileAttribute = Attribute detected as File Archive. : {0} DestinationNotFileAttribute = Attribute detected as NOT File Archive. : {0} DestinationDirectoryAttribute = Attribute detected as Directory. : {0} DestinationNotDirectoryAttribute = Attribute detected as NOT Directory. : {0} DestinationDetectedAsFile = Destination '{0}' detected as File. Checking reparse point (Symbolic Link) or not. DestinationDetectedAsDirectory = Destination '{0}' detected as File. Checking reparse point (Symbolic Link) or not. DestinationNotFound = Destination '{0}' not found. DestinationNotReparsePoint = Destination was not reparse point (Symbolic Link). DestinationReparsePoint = Destination detected as reparse point (Symbolic Link). DestinationSourcePathDesired = DEstination '{0}' detected as reparse point (Symbolic Link), and SourcePath desired. DestinationSourcePathNotDesired = DEstination '{0}' detected as reparse point (Symbolic Link), but SourcePath not desired. "@ } $errorMessages = Data { ConvertFrom-StringData -StringData @" "@ } #endregion #region *-TargetResource function Get-TargetResource { [CmdletBinding()] [OutputType([System.Collections.Hashtable])] param ( [parameter(Mandatory = $true)] [System.String]$DestinationPath, [parameter(Mandatory = $true)] [System.String]$SourcePath, [parameter(Mandatory = $true)] [ValidateSet("Present","Absent")] [System.String]$Ensure ) $returnValue = @{ SourcePath = $SourcePath DestinationPath = $DestinationPath } try { if ($target = IsFile -Path $DestinationPath) { Write-Debug -Message ($debugMessages.DestinationDetectedAsFile -f $DestinationPath) if (IsFileReparsePoint -Path $target.FullName) { Write-Debug -Message $debugMessages.DestinationReparsePoint $symTarget = $SymbolicLinkGet::GetSymbolicLinkTarget($target.FullName) if (Test-Path $SourcePath) { Add-Member -InputObject $target -MemberType NoteProperty -Name SymbolicPath -Value $symTarget -Force } } } elseif ($target = IsDirectory -Path $DestinationPath) { Write-Debug -Message ($debugMessages.DestinationDetectedAsDirectory -f $DestinationPath) if (IsDirectoryReparsePoint -Path $target.FullName) { Write-Debug -Message $debugMessages.DestinationReparsePoint $symTarget = $SymbolicLinkGet::GetSymbolicLinkTarget($target.FullName) if (Test-Path $SourcePath) { Add-Member -InputObject $target -MemberType NoteProperty -Name SymbolicPath -Value $symTarget -Force } } } if ([string]::IsNullOrEmpty($symTarget)) { Write-Debug -Message ($debugMessages.DestinationNotFound -f $DestinationPath) $returnValue.Ensure = [EnsureType]::Absent } elseif ($symTarget -eq $SourcePath) { Write-Debug -Message ($debugMessages.DestinationSourcePathDesired -f $DestinationPath) $returnValue.Ensure = [EnsureType]::Present } else { Write-Debug -Message ($debugMessages.DestinationSourcePathNotDesired -f $DestinationPath) $returnValue.Ensure = [EnsureType]::Absent } } catch { $returnValue.Ensure = [EnsureType]::Absent Write-Verbose $_ } return $returnValue } function Set-TargetResource { [CmdletBinding()] param ( [parameter(Mandatory = $true)] [System.String]$DestinationPath, [parameter(Mandatory = $true)] [System.String]$SourcePath, [parameter(Mandatory = $true)] [ValidateSet("Present","Absent")] [System.String]$Ensure ) # Absent if ($Ensure -eq [EnsureType]::Absent.ToString()) { Write-Verbose -Message ($verboseMessages.RemovingDestinationPath -f $DestinationPath) RemoveSymbolicLink -Path $DestinationPath return; } # Present if ($file = IsFile -Path $SourcePath) { # Check File Type if (IsFileAttribute -Path $file) { Write-Verbose ($verboseMessages.CreateSymbolicLink -f $DestinationPath, $file.fullname, $false) $SymbolicLinkSet::CreateSymLink($DestinationPath, $file.fullname, $false) } } elseif ($directory = IsDirectory -Path $SourcePath) { # Check Directory Type if (IsDirectoryAttribute -Path $directory) { Write-Verbose ($verboseMessages.CreateSymbolicLink -f $DestinationPath, $directory.fullname, $false) $SymbolicLinkSet::CreateSymLink($DestinationPath, $directory.fullname, $true) } } } function Test-TargetResource { [CmdletBinding()] [OutputType([System.Boolean])] param ( [parameter(Mandatory = $true)] [System.String]$DestinationPath, [parameter(Mandatory = $true)] [System.String]$SourcePath, [parameter(Mandatory = $true)] [ValidateSet("Present","Absent")] [System.String]$Ensure ) return (Get-TargetResource -DestinationPath $DestinationPath -SourcePath $SourcePath -Ensure $Ensure).Ensure -eq $Ensure } #endregion #region Get helper function IsFile ([string]$Path) { if ([System.IO.File]::Exists($Path)) { Write-Debug ($debugMessages.SourceFileDetected -f $Path) return [System.IO.FileInfo]($Path) } } function IsDirectory ([string]$Path) { if ([System.IO.Directory]::Exists($Path)) { Write-Debug ($debugMessages.SourceDirectoryDetected -f $Path) return [System.IO.DirectoryInfo] ($Path) } } function IsFileReparsePoint ([System.IO.FileInfo]$Path) { $fileAttributes = [System.IO.FileAttributes]::Archive, [System.IO.FileAttributes]::ReparsePoint -join ', ' $attribute = [System.IO.File]::GetAttributes($Path) $result = $attribute -eq $fileAttributes if ($result) { Write-Debug ($debugMessages.SourceAttributeDetectReparsePoint -f $attribute) return $result } else { Write-Debug ($debugMessages.SourceAttributeNotDetectReparsePoint -f $attribute) return $result } } function IsDirectoryReparsePoint ([System.IO.DirectoryInfo]$Path) { $directoryAttributes = [System.IO.FileAttributes]::Directory, [System.IO.FileAttributes]::ReparsePoint -join ', ' $result = $Path.Attributes -eq $directoryAttributes if ($result) { Write-Debug ($debugMessages.SourceAttributeDetectReparsePoint -f $Path.Attributes) return $result } else { Write-Debug ($debugMessages.SourceAttributeNotDetectReparsePoint -f $Path.Attributes) return $result } } #endregion #region Remove helper function RemoveSymbolicLink { [OutputType([Void])] [cmdletBinding()] param ( [parameter(Mandatory = 1, Position = 0, ValueFromPipeline =1, ValueFromPipelineByPropertyName = 1)] [Alias('FullName')] [String]$Path ) function RemoveFileReparsePoint ([System.IO.FileInfo]$Path) { [System.IO.File]::Delete($Path.FullName) } function RemoveDirectoryReparsePoint ([System.IO.DirectoryInfo]$Path) { [System.IO.Directory]::Delete($Path.FullName) } try { if ($file = IsFile -Path $Path) { if (IsFileReparsePoint -Path $file) { RemoveFileReparsePoint -Path $file } } elseif ($directory = IsDirectory -Path $Path) { if (IsDirectoryReparsePoint -Path $directory) { RemoveDirectoryReparsePoint -Path $directory } } } catch { throw $_ } } #endregion #region Set helper function IsFileAttribute ([System.IO.FileInfo]$Path) { $fileAttributes = [System.IO.FileAttributes]::Archive $attribute = [System.IO.File]::GetAttributes($Path.fullname) $result = $attribute -eq $fileAttributes if ($result) { Write-Debug ($debugMessages.DestinationFileAttribute -f $attribute) } else { Write-Debug ($debugMessages.DestinationNotFileAttribute-f $attribute) } return $result } function IsDirectoryAttribute ([System.IO.DirectoryInfo]$Path) { $directoryAttributes = [System.IO.FileAttributes]::Directory $result = $Path.Attributes -eq $directoryAttributes if ($result) { Write-Debug ($debugMessages.DestinationDirectoryAttribute -f $attribute) } else { Write-Debug ($debugMessages.DestinationNotDirectoryAttribute -f $attribute) } return $result } #endregion Export-ModuleMember -Function *-TargetResource |