private/Repair-PowerShellOutputRedirectionBug.ps1
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<# .SYNOPSIS Fix for PS2/3 .DESCRIPTION PowerShell v2/3 caches the output stream. Then it throws errors due to the FileStream not being what is expected. Fixes "The OS handle's position is not what FileStream expected. Do not use a handle simultaneously in one FileStream and in Win32 code or another FileStream." .EXAMPLE Repair-PowerShellOutputRedirectionBug #Only for PSVersion below PS4 #> function Repair-PowerShellOutputRedirectionBug { [CmdletBinding()] Param( ) if($PSVersionTable.PSVersion.Major -lt 4) { return } try{ # http://www.leeholmes.com/blog/2008/07/30/workaround-the-os-handles-position-is-not-what-filestream-expected/ plus comments $bindingFlags = [Reflection.BindingFlags] "Instance,NonPublic,GetField" $objectRef = $host.GetType().GetField("externalHostRef", $bindingFlags).GetValue($host) $bindingFlags = [Reflection.BindingFlags] "Instance,NonPublic,GetProperty" $consoleHost = $objectRef.GetType().GetProperty("Value", $bindingFlags).GetValue($objectRef, @()) [void] $consoleHost.GetType().GetProperty("IsStandardOutputRedirected", $bindingFlags).GetValue($consoleHost, @()) $bindingFlags = [Reflection.BindingFlags] "Instance,NonPublic,GetField" $field = $consoleHost.GetType().GetField("standardOutputWriter", $bindingFlags) $field.SetValue($consoleHost, [Console]::Out) [void] $consoleHost.GetType().GetProperty("IsStandardErrorRedirected", $bindingFlags).GetValue($consoleHost, @()) $field2 = $consoleHost.GetType().GetField("standardErrorWriter", $bindingFlags) $field2.SetValue($consoleHost, [Console]::Error) } catch { Write-Warning "Unable to apply redirection fix." } } |