CODEWITHSUNDEEP
powershellerror-handling
user3019059
user3019059

Reputation: 187

Redirect error output to a file within the script

I have a script that is being called a certain way, i cannot change it. I want to redirect the error messages from the entire script to a file. How does this work?

I did this, which works, except the errors are complete gone:

$ErrorActionPreference="SilentlyContinue"
Start-Transcript -path C:\output.txt -append

write-host "test"

some nonsence that creates as error

Stop-Transcript

Thanks

Upvotes: 0

Views: 9817

Answers (4)

0xFULL
0xFULL

Reputation: 51

Since Powershell 5.1, there are "Redirectable output streams" with bash-like similar syntax, e.g.

Write-Output "good" > success.txt
Write-Error "failed" 2> error.txt
Write-Warning "attention" 3> warning.txt

You can also redirect error to success stream.

./script.ps1 2>&1 > out.log

Alternatively, to redirect all streams when running a script or command, use

.\script.ps1 *> $null # suppress all output

See about_Redirection for more details.

Upvotes: 1

John Zabroski
John Zabroski

Reputation: 2357

Beware using Start-Transcript. You might get the following error:

Start-Transcript : This host does not support transcription.
At D:\Apps\TranscriptTest\TranscriptTest.ps1:3 char:1
+ Start-Transcript -Path Log.txt -Append
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotImplemented: (:) [Start-Transcript], PSNotSupportedException
    + FullyQualifiedErrorId : NotSupported,Microsoft.PowerShell.Commands.StartTranscriptCommand

Upvotes: 0

ojk
ojk

Reputation: 2542

Would this work for you?

try{
    # your code goes here
}
catch{
    $exception = $_.Exception.Message
    Out-File -FilePath 'c:\myscript.log' -Append -InputObject $exception
}

Upvotes: 2

xBr0k3n
xBr0k3n

Reputation: 415

I needed something like this before, but i could change how the file is being called etc.

If its launched from commandline as mentioned, by arco444, you can use the below to pipe everything to one file:

PowerShell.exe -Command "& {c:\myscript.ps1}" > c:\myscript.log

Upvotes: 0

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