想要将 PSList 包装在 Powershell 函数中以使用管道值

Question

我喜欢 PSList，并使用 CPU 和运行时间来识别需要终止的进程。我想将它包装在一个返回管道值的 powershell 函数中，以便我可以执行如下操作：

get-remoteprocess server1 | where  {$_.CPUMinutes -gt 4}

我陷入了从函数返回值 - 我理解它需要是一个数组的物体。

这是我的第一个版本的样子：

function get-remoteproc {
param ($hostname)
$results = pslist "\\$hostname" 

for ($i= 3; $i -le $results.length; $i++) {
    $strline = $results[$i]
    $StrWithPrefix = " "+$results[$i]
    $trimmedline = $StrWithPrefix -replace '\s+', " ";
    $Splitline = $trimmedline.Split(" ")
    $ProcessName = $Splitline[1]
    .
    .
    $ProcessCPUTime = ":"+[string]$Splitline[7]
    $SplitCpuTime = $ProcessCPUTime.Split(":")

    $CpuHours = $SplitCpuTime[1]
    $CpuMinutes = $SplitCpuTime[2]
    $CpuSeconds = $SplitCpuTime[3]
    .
    .
    .

    $obj = New-Object PSObject
       $obj | Add-Member Noteproperty -Name "Name" -Value $Name
       $obj | Add-Member Noteproperty -Name "PPid" -Value $Ppid
       $obj | Add-Member Noteproperty -Name "Pri" -Value $Pri

}

采用 Doug Finke 的建议，该建议非常简洁，这是我稍微修改的版本，它与管道值配合得很好。

function get-remoteproc {
    param ($hostname=$env:COMPUTERNAME)

    $results = PsList "\\$hostname"

    foreach($record in $results[3..($results.Count)]) {
        # Remove spaces
        while ($record.IndexOf("  ") -ge 0) {
            $record = $record -replace "  "," "
        }

        $Name,$Processid,$Pri,$Thd,$Hnd,$Priv,$CPUTime,$ElapsedTime = $record.Split(" ")

        $properties = @{
            Name = $Name
            Pid = $Processid
            Pri = $Pri
            Thd = $Thd
            Hnd = $Hnd
            Priv = $Priv
            CPUTime = $CPUTime
            ElapsedTime = $ElapsedTime
        }

        New-Object PSObject -Property $properties |
            Add-Member -PassThru ScriptProperty CPUH   {[int]$this.CPUTime.Split(":")[0]} |
            Add-Member -PassThru ScriptProperty CPUM {[int]$this.CPUTime.Split(":")[1]} |
            Add-Member -PassThru ScriptProperty CPUS {[int]$this.CPUTime.Split(":")[2]} |
            Add-Member -PassThru ScriptProperty ElaH {[int]$this.ElapsedTime.Split(":")[0]} |
            Add-Member -PassThru ScriptProperty ElaM {[int]$this.ElapsedTime.Split(":")[1]} |
            Add-Member -PassThru ScriptProperty ElaS {[int]$this.ElapsedTime.Split(":")[2]} 
    }
}

以及对该函数的调用，这表明对象已正确展开以供管道使用：

get-remoteproc "Server1" | where {(($_.CPUM * $_.CPUS) -gt 60) -and ($_.name -notmatch "Idle" )}|
ft name, pid, pri, thd, hnd, priv, CPUH, cpuM, cpuS, ElaH, ElaM, ElaS   -auto

谢谢大家！

Answer 1

正如 empo 指出的那样，您需要将 $obj 发送回管道。这是将 plist 文本处理为 PowerShell 对象的另一种方法。

function get-remoteproc {
    param ($hostname=$env:COMPUTERNAME)

    $results = PsList "\\$hostname"

    foreach($record in $results[3..($results.Count)]) {
        # Remove spaces
        while ($record.IndexOf("  ") -ge 0) {
            $record = $record -replace "  "," "
        }

        $Name,$Processid,$Pri,$Thd,$Hnd,$Priv,$CPUTime,$ElapsedTime = $record.Split(" ")

        $properties = @{
            Name = $Name
            Pid = $Processid
            Pri = $Pri
            Thd = $Thd
            Hnd = $Hnd
            Priv = $Priv
            CPUTime = $CPUTime
            ElapsedTime = $ElapsedTime
        }

        New-Object PSObject -Property $properties |
            Add-Member -PassThru ScriptProperty CPUHours   {$this.CPUTime.Split(":")[0]} |
            Add-Member -PassThru ScriptProperty CPUMinutes {$this.CPUTime.Split(":")[1]} |
            Add-Member -PassThru ScriptProperty CPUSeconds {$this.CPUTime.Split(":")[2]} 

    }
}

Answer 2

要返回一一传递给管道的值数组，只需在函数中返回多个值即可。例如：

function get-remoteproc {
param ($hostname)
  $results = pslist "\\$hostname" 
  for ($i= 3; $i -le $results.length; $i++) {

    # your staff to $obj

    # output $obj
    $obj
  }
}

函数结果是$obj数组。当连接到管道时，数组将被注册，所有值将一一传递到流中。