Powershell script does not continue on write-eventlog

Question

I have the following block in script that checks a log file and if it finds a specific line, should continue.

$keywords=Get-Content "C:\Users\user\desktop\keywords.txt"
Get-Content "C:\Users\user\desktop\some.log" -tail 1 -wait |
ForEach-object {
foreach($word in $keywords) {
if($_ -match "$word") {
Write-EventLog -LogName Application -EventID 2001 -EntryType Information -Source serviceCheck -Message "[SUCCESS] The service has been initialized"
Write-Host "[SUCCESS] The service has been initialized" 
}
}
} | Select -First 1

This logs the event but never continues with the rest of the script. If I put some other command in if($_ -match "$word") {get-date} for example or anything else, it works and continues to the next command.

How should this be made to write in event viewer and continue?

@SantiagoSquarzon It probably should, it's used to terminate Get-Content -Wait — Mathias R. Jessen
– Mathias R. Jessen, Commented Dec 28, 2022 at 12:53
It works for me. Every time I append a keyword to the log it runs write-eventlog. — js2010
– js2010, Commented Dec 28, 2022 at 13:40
@js2010 yes, it works, but doesnt continue with the execution. — Delyan
– Delyan, Commented Dec 28, 2022 at 14:27
That is the logic of your code. Until get-content stops running, the foreach-object loop will run forever. — js2010
– js2010, Commented Dec 28, 2022 at 14:34

Mathias R. Jessen · Accepted Answer · 2022-12-28 12:53:14Z

2

You need to output something for the Select -First 1 statement to react to:

$keywords = Get-Content "C:\Users\user\desktop\keywords.txt"
Get-Content "C:\Users\user\desktop\some.log" -tail 1 -wait |ForEach-object {
    foreach ($word in $keywords) {
        if ($_ -match "$word") {
            Write-EventLog -LogName Application -EventID 2001 -EntryType Information -Source serviceCheck -Message "[SUCCESS] The service has been initialized"
            Write-Host "[SUCCESS] The service has been initialized" 
            "literally any value will do!"
        }
    }
} | Select -First 1 |Out-Null

answered Dec 28, 2022 at 12:53

Mathias R. Jessen

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4 Comments

Delyan Over a year ago

It doesnt work, I see your point but thats why you have write-host, just to popup something. As I said - with anything different than write-eventlog it works.

Delyan Over a year ago

Oh I got it, there is a line "literally any value will do!" . It does break it and does not print anything. Awesome!

js2010 Over a year ago

Oh, so you want to quit the foreach-object loop using "select -first 1", the first time you write an event log.

Mathias R. Jessen Over a year ago

@Delyan Write-Host doesn't actually output to the pipeline, it writes straight to the host application (hence no effect) :)

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