如何设置运行PowerShell脚本的时间限制? [英] How can you set a time limit for a PowerShell script to run for?

问题描述

我想在PowerShell(v2)脚本上设置时间限制，以便在该时间限制到期后强制退出.

I want to set a time limit on a PowerShell (v2) script so it forcibly exits after that time limit has expired.

我在PHP中看到它们具有诸如set_time_limit和max_execution_time之类的命令，您可以在其中限制脚本甚至函数执行的时间.

I see in PHP they have commands like set_time_limit and max_execution_time where you can limit how long the script and even a function can execute for.

对于我的脚本，正在查看时间的do/while循环是不合适的，因为我正在调用可能会长时间挂起的外部代码库.

With my script, a do/while loop that is looking at the time isn't appropriate as I am calling an external code library that can just hang for a long time.

我想限制一段代码，只允许它运行x秒钟，之后我将终止该代码块，并向用户返回脚本超时的响应.

I want to limit a block of code and only allow it to run for x seconds, after which I will terminate that code block and return a response to the user that the script timed out.

我看过后台作业，但是它们在不同的线程中运行，因此不会对父线程拥有杀死权限.

I have looked at background jobs but they operate in a different thread so won't have kill rights over the parent thread.

有人处理过这个问题或有解决方案吗?

Has anyone dealt with this or have a solution?

谢谢！

推荐答案

我知道这是一篇旧文章，但是我已经在脚本中使用了它.

I know this is an old post, but I have used this in my scripts.

我不确定它是否正确使用，但是George提出的System.Timers.Timer给了我一个主意，并且似乎对我有用.

I am not sure if its the correct use of it, but the System.Timers.Timer that George put up gave me an idea and it seems to be working for me.

我将它用于有时挂在WMI查询上的服务器，超时会阻止它卡住. 然后，我将消息输出到日志文件中，而不是写主机，以便我可以查看损坏的服务器并在需要时进行修复.

I use it for servers that sometimes hang on a WMI query, the timeout stops it getting stuck. Instead of write-host I then output the message to a log file so I can see which servers are broken and fix them if needed.

我也不使用服务器主机名的Guid.

I also don't use a guid I use the servers hostname.

我希望这有道理并能为您提供帮助.

I hope this makes sense and helps you.

$MyScript = {
              Get-WmiObject -ComputerName MyComputer -Class win32_operatingsystem
            }

$JobGUID = [system.Guid]::NewGuid()

$elapsedEventHandler = {
    param ([System.Object]$sender, [System.Timers.ElapsedEventArgs]$e)

    ($sender -as [System.Timers.Timer]).Stop()
    Unregister-Event -SourceIdentifier $JobGUID
    Write-Host "Job $JobGUID removed by force as it exceeded timeout!"
    Get-Job -Name $JobGUID | Remove-Job -Force
}

$timer = New-Object System.Timers.Timer -ArgumentList 3000 #just change the timeout here
Register-ObjectEvent -InputObject $timer -EventName Elapsed -Action $elapsedEventHandler -SourceIdentifier $JobGUID
$timer.Start()

Start-Job -ScriptBlock $MyScript -Name $JobGUID

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