CODEWITHSUNDEEP
powershellstderr
Colonel Panic
Colonel Panic

Reputation: 137544

Powershell redirect standard output to standard error

In Powershell, how do I redirect standard output to standard error?

I know I can do the converse with 2>&1 so I tried:

echo "Hello" 1>&2

but I get a silly error The '1>&2' operator is reserved for future use.

I ask because being able to do this would make it easier for me to debug another problem. See $LastExitCode=0 but $?=False in PowerShell. Redirecting stderr to stdout gives NativeCommandError

Upvotes: 2

Views: 3304

Answers (4)

Colonel Panic
Colonel Panic

Reputation: 137544

Alas, it's not possible to redirect standard output to standard error. I think that's an unfortunate omission. Let's hope this is fixed in a future version of Powershell.

Upvotes: 2

BartekB
BartekB

Reputation: 8650

First: there is nothing silly with error you get. In v3 e.g. we got some additional redirection option and eventually I guess we will be able to redirect verbose to warning, debug to error, and output to error, as you needed.

Before that will happen you can try to emulate this behavior, at least for output. Not sure if that will solve your issues, but you can:

echo "foo" | Write-Error
yourproram.exe | Write-Error

HTH Bartek

Upvotes: 1

CB.
CB.

Reputation: 60910

Powershell way:

$host.ui.WriteErrorLine('Hello')

This not fill $error automatic variable.

Upvotes: 1

goric
goric

Reputation: 11855

Assuming you are in full control of the messages, you could tap into .NET to help out with this:

[Console]::Error.WriteLine("Hello")

Upvotes: 1

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