如何正确检查进程是否正在运行并停止它

Question

确定进程是否正在运行的正确方法是什么,例如FireFox,并将其停止？

我做了一些环顾四周,我找到的最好方法是:

if((get-process "firefox" -ea SilentlyContinue) -eq $Null){ 
        echo "Not Running" 
}

else{ 
    echo "Running"
    Stop-Process -processname "firefox"
 }

这是理想的做法吗？如果没有,这样做的正确方法是什么？

Answer 1

你这样做的方式是你要两次查询这个过程.林恩也首先提出了一个很好的观点.我可能会尝试以下内容:

# get Firefox process
$firefox = Get-Process firefox -ErrorAction SilentlyContinue
if ($firefox) {
  # try gracefully first
  $firefox.CloseMainWindow()
  # kill after five seconds
  Sleep 5
  if (!$firefox.HasExited) {
    $firefox | Stop-Process -Force
  }
}
Remove-Variable firefox

Answer 2

如果您不需要显示"running"/"not runnuning"的确切结果,您可以简单地:

ps notepad -ErrorAction SilentlyContinue | kill -PassThru

如果该过程没有运行,您将得不到任何结果.如果它正在运行,您将收到get-process输出,并且该过程将停止.

Answer 3

@jmp242 - 泛型System.Object类型不包含该方法，但在收集变量时CloseMainWindow静态转换类型对我有用。使用此转换（并将循环更改为 use ）更新的代码（来自此答案）如下。System.Diagnostics.ProcessProcessListForEach-Object

function Stop-Processes {
    param(
        [parameter(Mandatory=$true)] $processName,
                                     $timeout = 5
    )
    [System.Diagnostics.Process[]]$processList = Get-Process $processName -ErrorAction SilentlyContinue

    ForEach ($Process in $processList) {
        # Try gracefully first
        $Process.CloseMainWindow() | Out-Null
    }

    # Check the 'HasExited' property for each process
    for ($i = 0 ; $i -le $timeout; $i++) {
        $AllHaveExited = $True
        $processList | ForEach-Object {
            If (-NOT $_.HasExited) {
                $AllHaveExited = $False
            }                    
        }
        If ($AllHaveExited -eq $true){
            Return
        }
        Start-Sleep 1
    }
    # If graceful close has failed, loop through 'Stop-Process'
    $processList | ForEach-Object {
        If (Get-Process -ID $_.ID -ErrorAction SilentlyContinue) {
            Stop-Process -Id $_.ID -Force -Verbose
        }
    }
}