如何重定向另一个进程创建的进程的标准I / O. [英] How can I redirect standard I/O of a process created by another process

问题描述

我已经使用带有重定向的stdi / o的System.Diagnostics.Process :: start（）启动了一个进程。此过程创建另一个过程。我想在powershell中重定向第二个进程的stdi / o。



这是一个示例代码，我在其中运行cmd.exe进程创建的perl脚本使用System.Diagnostics.Process :: start（）。我希望在日志文件中看到perl脚本的输出，并将关键笔划发送到perl解释器。



Powershell脚本：

 $ LogFilePath =（（get-location）.ToString（）+\ Log.txt）; 
测试子进程的stdio重定向> $ LOGFILEPATH; 
 $ cmdProcess = New-Object System.Diagnostics.Process; 
 $ cmdProcess.StartInfo.FileName =cmd.exe
 $ cmdProcess.StartInfo.UseShellExecute = $ false; 
 $ cmdProcess.StartInfo.RedirectStandardInput = $ true; 
 $ cmdProcess.StartInfo.RedirectStandardOutput = $ true; 
 $ cmdProcess.StartInfo.RedirectStandardError = $ true; 
 Register-ObjectEvent $ cmdProcess ErrorDataReceived -SourceIdentifiercmdProcess.ErrorDataReceived-Action {if（！[string] :: IsNullOrEmpty（$ EventArgs.Data））{$ EventArgs.Data | Add-Content $ global：LogFilePath}} 
 Register-ObjectEvent $ cmdProcess OutputDataReceived -SourceIdentifiercmdProcess.OutputDataReceived-Action {if（！[string] :: IsNullOrEmpty（$ EventArgs.Data））{$ EventArgs.Data | Add-Content $ global：LogFilePath}} 
 $ cmdProcess.start（）
 Start-Sleep -s 2; 
 $ cmdProcess.BeginErrorReadLine（）; 
开始睡眠-s 2; 
 $ cmdProcess.BeginOutputReadLine（）; 
开始睡眠-s 2; 
 $ cmdProcess.StandardInput.WriteLine（D：\ batt_files\CC_Automation\test\hello.pl）; 

hello.pl

 printHello \ n; 
 print按Enter键退出; 
 $ key = <  > ; 

输出：Log.txt

测试子进程的stdio重定向
 Microsoft Windows [版本6.1.7601] 
版权所有（c）2009 Microsoft Corporation。版权所有。 
 C：\ Windows \ System32 \ WindowsPowerShell \v1.0> D：\ batt_files\CC_Automation\test\hello.pl 

解决方案

LogFilePath =（（get-location）.ToString（）+\ Log.txt）;
测试子进程的stdio重定向>

LogFilePath;

cmdProcess = New-Object System.Diagnostics.Process;

I have started a process using System.Diagnostics.Process::start() with redirected stdi/o. This process creates another process. I want to redirect the stdi/o of the second process in powershell.

Here is a sample code in which i am running a perl script from cmd.exe process created using System.Diagnostics.Process::start(). I want to see the output of the perl script in the log file as well as send key strokes to the perl interpreter.

Powershell script:

$LogFilePath = ((get-location).ToString() + "\Log.txt");
"test stdio redirection of child process" > $LogFilePath;
$cmdProcess       = New-Object System.Diagnostics.Process;
$cmdProcess.StartInfo.FileName       = "cmd.exe"    
$cmdProcess.StartInfo.UseShellExecute = $false;       
$cmdProcess.StartInfo.RedirectStandardInput = $true;
$cmdProcess.StartInfo.RedirectStandardOutput = $true;
$cmdProcess.StartInfo.RedirectStandardError = $true;	
Register-ObjectEvent $cmdProcess ErrorDataReceived -SourceIdentifier "cmdProcess.ErrorDataReceived" -Action {  if(![string]::IsNullOrEmpty($EventArgs.Data)) { $EventArgs.Data | Add-Content $global:LogFilePath } } 
Register-ObjectEvent $cmdProcess OutputDataReceived -SourceIdentifier "cmdProcess.OutputDataReceived" -Action { if(![string]::IsNullOrEmpty($EventArgs.Data)) { $EventArgs.Data | Add-Content $global:LogFilePath } } 
$cmdProcess.start()
Start-Sleep -s 2 ;
$cmdProcess.BeginErrorReadLine();
Start-Sleep -s 2 ;
$cmdProcess.BeginOutputReadLine();
Start-Sleep -s 2 ;
$cmdProcess.StandardInput.WriteLine("D:\batch_files\CC_Automation\test\hello.pl") ;

hello.pl

print "Hello\n";
print "press Enter key to exit";
$key = <>;

Output:Log.txt

test stdio redirection of child process
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.
C:\Windows\System32\WindowsPowerShell\v1.0>D:\batch_files\CC_Automation\test\hello.pl

解决方案

LogFilePath = ((get-location).ToString() + "\Log.txt"); "test stdio redirection of child process" >

LogFilePath;

cmdProcess = New-Object System.Diagnostics.Process;

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