[英]Capturing output of PsExec using PowerShell changes the output
我要实现的目标是从运行psexec -nobanner \\\\1.2.3.4 net localgroup Administrators
重定向标准输出和标准错误。 当我重定向标准输出时,命令的结果将更改。 以我尝试过的任何方式,有关捕获标准输出的某些事情似乎都会改变结果。 我想知道为什么,并且想让它正常工作。
在PowerShell中,如果运行此命令:
psexec -nobanner \\1.2.3.4 net localgroup Administrators
我看到这个:
Couldn't access 1.2.3.4:
The trust relationship between this workstation and the primary domain failed.
(在Couldn't access 1.2.3.4:
结束,我简要地看到正在Connecting to 1.2.3.4...
而另一些东西闪烁得太快而无法看到。)
如果我尝试捕获输出,请使用以下命令:
$output = psexec.exe -nobanner \\1.2.3.4 net localgroup Administrators
我懂了:
Couldn't access 1.2.3.4:
The handle is invalid.
(如上所述,在Couldn't access 1.2.3.4:
结束的地方,我简要地看到了Connecting to 1.2.3.4...
)
我意识到我需要重定向错误流-这就是我开始的地方。 但是,即使不更改它,我什至无法获得标准输出。 这个问题是关于当我尝试捕获输出时乳清输出变化。
更新
我刚刚注意到,如果我运行相同的命令(上面在PowerShell主机中有效)
psexec -nobanner \\1.2.3.4 net localgroup Administrators
在PowerShell ISE中 ,出现以下相同错误:
psexec : The handle is invalid.
At line:1 char:1
+ psexec -nobanner \\1.2.3.4 net localgroup Administrators
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (The handle is invalid.:String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError
Connecting to 1.2.3.4...Couldn't access 1.2.3.4:
Connecting to 1.2.3.4...
那么,为什么在ISE中运行它会产生与普通主机不同的输出?
我尝试过的其他方法:
1.开始过程
Start-Process -Wait -PSPath 'C:\Windows\PSTools\psexec.exe' -NoNewWindow `
-ArgumentList "-nobanner \\$ip net localgroup Administrators" `
-RedirectStandardError '.\tempError.log' -RedirectStandardOutput '.\tempOutput.log'
'O:'
Get-Content .\tempOutput.log
'E:'
Get-Content .\tempError.log
这使:
O:
E:
The handle is invalid.
Connecting to 1.2.3.4...
Couldn't access 1.2.3.4:
Connecting to 1.2.3.4...
2.仅重定向标准输出
psexec -nobanner \\1.2.3.4 net localgroup Administrators > psexec.log
这使:
Couldn't access 1.2.3.4:
The handle is invalid.
[psexec.log为空,因为我仅重定向标准输出,而PsExec将其自身的消息写入标准错误。]
3.仅重定向标准错误
我注意到了一些奇怪的事情:如果我仅重定向标准错误, 它就可以工作 (PsExec可以工作,命令失败,输出被重定向):
psexec -nobanner \\1.2.3.4 net localgroup Administrators 2> psexec.log
psexec.log
文件包含:
psexec : The trust relationship between this workstation and the primary domain failed.
At line:1 char:1
+ psexec -nobanner \\1.2.3.4 net localgroup Administrators 2> ps ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (The trust relat... domain failed.:String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError
Connecting to 1.2.3.4...
Couldn't access 1.2.3.4:
Connecting to 1.2.3.4...
4.全部重定向
psexec.exe -nobanner \\1.2.3.4 net localgroup Administrators *>&1 | Set-Variable -Name Output
这给出了:
psexec : The handle is invalid.
At line:1 char:1
+ psexec -nobanner \\1.2.3.4 net localgroup Administrators *>&1 ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (The handle is invalid.:String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError
Connecting to 1.2.3.4...Couldn't access 1.2.3.4:
Connecting to 1.2.3.4...
我使用cmd
重复了上述内容:
5.仅使用cmd重定向标准输出
cmd /c C:\Windows\PsTools\psexec -nobanner \\1.2.3.4 net localgroup Administrators --% 1> psexec.log
给出:
Couldn't access 1.2.3.4:
The handle is invalid.
(直接到控制台)。 6.仅使用cmd重定向标准错误
cmd /c C:\Windows\PsTools\psexec -nobanner \\1.2.3.4 net localgroup Administrators --% 2> psexec.log
给出(在psexec.log
):
The trust relationship between this workstation and the primary domain failed.
Connecting to 1.2.3.4...
Couldn't access 1.2.3.4:
Connecting to 1.2.3.4...
psexec.exe是一个简单的可执行文件,可将输出写入stdout(标准输出)和stderr(标准错误)。 因此,要捕获输出,请使用:
psexec.exe > stdout.txt
将捕获发送到stdout。 psexec.exe 2> sterr.txt
以捕获发送到stderr的输出。 psexec.exe > combined.txt 2>&1
可以将stdout和stderr捕获到一个文件中。 有趣的是,psexec将默认消息写入stderr-通常为stdout。 因此,运行psexec时在shell中看到的实际上是错误输出,需要使用2>
捕获。
这会将myScript.ps1的所有输出返回到$ result变量,而PsExec周围没有其他所有垃圾。 假设您可以将ps1文件复制到目标计算机。
$result = & C:\tools\SysinternalsSuite\PsExec.exe \\$PC -nobanner C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -executionpolicy bypass -file c:\myScript.ps1 2> $null
符合PS命令版本
$result = & C:\tools\SysinternalsSuite\PsExec.exe \\$PC -nobanner C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -executionpolicy bypass -command "get-process" 2> $null
命令行版本
$result = & C:\tools\SysinternalsSuite\PsExec.exe \\$PC -nobanner C:\Windows\System32\cmd.exe /c "ipconfig" 2> $null
这是一个完整的脚本,用于使用psexec和Runspace从远程系统运行和收集报告数据。 它比开始作业快得多,而且占用的内存少得多。
################################################################################################
# PSEXEC_Command_Runspaces
# Uses PSEXEC to run a command on multiple computers. Useful when PS remoting is not enabled
# but you have admin rights.
#
# Requires RSAT tools for the get-adcomputer command. You could import a csv or other method
# to obtain a list of computers instead.
################################################################################################
# Parameters
################################################################################################
#The list of computers to process
$pclist = get-adcomputer -filter "OperatingSystem -eq 'Windows 10 Enterprise' -and Name -like 'RC-*'" -properties DNSHostName | select -ExpandProperty DNSHostName
$Throttle = 500 #number of concurrent runspaces. The higher this is, the more memory is needed for the runspaces. 500 takes less than 1GB for this script.
################################################################################################
# This is the script that will run in each runspace.
################################################################################################
$scriptblock = {
Param (
$nothing, #this empty variable seems to be required because if you pass a single variable, it gets corrupted.
$PC
)
if (test-connection $PC -Count 1 -ea SilentlyContinue) {
# Create script folders on remote computer and copy report script.
md \\$PC\c$\wsapps -ea SilentlyContinue
md \\$PC\C$\wsapps\QA -ea SilentlyContinue
copy 'C:\tools\Powershell\Review Center\PullBIOSandLoggedOnUser.ps1' "\\$pc\c$\wsapps\qa" -Force
# Run ps exec and collect output
# 2> $null gets rid of the "starting service and other junk from the PSexec output
$result = & C:\tools\SysinternalsSuite\PsExec.exe \\$PC -nobanner C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -executionpolicy bypass -file c:\wsapps\qa\PullBIOSandLoggedOnUser.ps1 2> $null
#remote script file from remote machine. You could also remove folders if apropriate here.
remove-item \\$pc\C$\wsapps\QA\PullBIOSandLoggedOnUser.ps1 -ea SilentlyContinue
#Parse results from single line of output. PS does not return muliple lines of output from PSEXEC when wrapped in a job or runspace.
$parts = $result.split(",")
$outobj = New-Object psobject
$outobj | Add-Member ComputerName $PC
$outobj | Add-Member WindowsVersion ($parts[1].split(":")[1])
$outobj | Add-Member BiosVersion ($parts[2].split(":")[1])
$outobj | Add-Member LoggedOnUser ($parts[3].split(":")[1])
$outobj | Add-Member IPAddress ($parts[4].split(":")[1])
}
else { #report object indicating offline status.
$outobj = New-Object psobject
$outobj | Add-Member ComputerName $PC
$outobj | Add-Member WindowsVersion "Offline"
$outobj | Add-Member BiosVersion "?"
$outobj | Add-Member LoggedOnUser "?"
$outobj | Add-Member IPAddress "?"
}
write-output $outobj
}
################################################################################################
# Main Logic
# Runspaces are much, much faster than start-job and use far less memory
# 260 computers took 4.5GB memory and > 20 minutes to process with start- job
# 260 computers took 260MB memory and < 1 minute to process with runspaces.
################################################################################################
$RunspacePool = [runspacefactory]::CreateRunspacePool(1,$Throttle)
$RunspacePool.Open()
#RSArrayList contains a link to each runspace. Needed to track progress and obtain results later
$RSArrayList = New-Object System.Collections.ArrayList
#Loop through each PC in the list, creating runspaces. The runspace pool is used for multiple parallel spaces with rate control.
foreach ($PC in $PClist) {
$PowerShell = [powershell]::Create()
[void]$PowerShell.AddScript($scriptblock)
[void]$powershell.AddArgument("").AddArgument($PC) #extra argument to avoid single argument corruption bug.
$PowerShell.RunspacePool = $RunspacePool
$ThisRS = New-Object psobject
$ThisRS | Add-Member Computer $PC
$ThisRS | Add-Member PSInstance $PowerShell
$thisRS | Add-Member Space ($PowerShell.BeginInvoke()) #execution starts here.
$RSArrayList += $thisRS
write-host "Adding $PC"
}
################################################################################################
#Progress bar to track when jobs are finished.
write-host "waiting for runspaces to finish"
while (($RSArrayList.space.iscompleted -eq $false).count -gt 0) {
$Done = $RSArrayList.count - ($RSArrayList.space.iscompleted -eq $false).count
if ($Done -eq 0) {$percentComplete = 0}
else {$percentComplete = $Done / $RSArrayList.count * 100}
write-progress -Activity "Waiting for jobs to complete" -Status (($RSArrayList.count - $Done).ToString() + "Left") -PercentComplete $percentComplete
sleep -Seconds 1
}
################################################################################################
#collecting results and creating report object
write-host "Processing Results"
$Report = New-Object System.Collections.ArrayList
foreach ($RS in $RSArrayList) {
$Report += $RS.PSInstance.EndInvoke($RS.Space) #equivilant to "receive-job"
$RS.PSInstance.Dispose() # frees up memory.
}
$Report | ft
这是在远程系统上运行的报告收集脚本
################################################################################################
# Looks up the computer name, Windows Version, BIOS version, logged on user, and IP address of the computer.
# Designed to be called by start-job or runspaces (much faster).
################################################################################################
$computername = $env:COMPUTERNAME
$WindowsVersion = (Get-WmiObject win32_OperatingSystem).BuildNumber.toString()
$BiosVersion = (Get-WmiObject Win32_BIOS).Name
$IPAddress = "No 10 range IP"
$addr = (Get-NetIPAddress -AddressFamily IPv4).ipaddress | where {$_ -like '10.*'}
if ($addr) {$IPAddress = $addr}
$LoggedOnUser = "None"
$quser = (quser.exe 2> $null | select-string "console").line
if ($quser) {$LoggedOnUser = $quser.Substring(1,$quser.IndexOf(" ",1)-1)}
# For whatever reason, PS will not return multiple lines of output from PSexec when run under start-job or runspaces. This was the workaround.
"Computername:$computername,WindowsVersion:$WindowsVersion,BIOSVersion:$BIOSVersion,LoggedOnUser:$LoggedOnUser,IPAddress:$IPAddress"
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