到目前为止，我已经编写了以下脚本来执行上述操作。

$procName = 'myprocess'
$process = Get-Process | Where-Object Name -EQ $procName
if(-not $process) {
    Write-Warning "$procName not found!"
}
else {
    $process | ForEach-Object {
        if($_.StartTime -lt [datetime]::Now.AddHours(-2)) {
                Stop-Process $_ -Force
            }
        else {
               sleep(1800)
           }   
        }
    }
}

推荐答案

如果我理解正确的话，您的else条件可能使用do-while循环：

else {
    do {
        "$procName is still running, sleeping for 1800 sec"
        Start-Sleep -Seconds 1800
    } while(Get-Process | Where-Object Name -EQ $procName)
}

但是，请注意，如果进程从未停止或您实现了最大计时器等，这可能会导致无限循环。

根据您关于实现最大计时器的评论，有许多方法可以做到这一点，我个人的偏好是使用StopWatch：

else {
    $timer = [System.Diagnostics.Stopwatch]::StartNew()
    do {
        # Do this while the process is still running AND
        # the timer hasn't yet reached 4 hours
        "$procName is still running, sleeping for 1800 sec"
        Start-Sleep -Seconds 1800
        $stillRunning = Get-Process | Where-Object Name -EQ $procName
    } while($stillRunning -and $timer.Elapsed.Hours -lt 4)
    $timer.Stop()
}