Windows 关闭主机文件句柄时的powershell行为

我正在寻找以下疯狂的解释（最好是文档）

假设我有以下简单的Perl脚本：

use strict;
use warnings;

my $output = "C:\\Temp\\aout.txt";
my $outpute = "C:\\Temp\\aoute.txt";
my $command = "powershell C:\\test.ps1";

close STDOUT;
close STDERR;
if ( (my $pid = fork()) == 0 ) {
    open (STDOUT,">>$output") or die "cannot open $output as stdout: $!";
    open (STDERR,">>$outpute") or die "cannot open $outpute as stderr: $!";
    exec $command or die "couldn't exec $command: $!";
} else {
    my $ret = waitpid($pid,0);
}

而且Powershell脚本包含：

write-output "yay1";
write-error "nay2";
write-output "yay3";
write-error "nay4";
write-output "yay5";
write-error "nay6";
write-output "yay7";
write-error "nay8";
write-host "done!";

如果我运行Perl脚本，它会像预期的那样生成两个文件，并具有以下输出：

aout.txt:

yay1
yay3
yay5
yay7
done!

C:\test.ps1 : nay2
At line:1 char:41
+ C:\test.ps1 <<<< 
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,test.ps1

C:\test.ps1 : nay4
At line:1 char:41
+ C:\test.ps1 <<<< 
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,test.ps1

C:\test.ps1 : nay6
At line:1 char:41
+ C:\test.ps1 <<<< 
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,test.ps1

C:\test.ps1 : nay8
At line:1 char:41
+ C:\test.ps1 <<<< 
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,test.ps1

aoute.txt:

yay1
yay3
yay5
yay7
done!

C:\test.ps1 : nay2
At line:1 char:41
+ C:\test.ps1 <<<< 
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,test.ps1

C:\test.ps1 : nay4
At line:1 char:41
+ C:\test.ps1 <<<< 
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,test.ps1

C:\test.ps1 : nay6
At line:1 char:41
+ C:\test.ps1 <<<< 
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,test.ps1

C:\test.ps1 : nay8
At line:1 char:41
+ C:\test.ps1 <<<< 
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,test.ps1

然后生成一个标准输出文件，其中包含所有输出：

yay1
C:\\test.ps1 : nay2
At line:1 char:41
+ C:\\test.ps1 <<<< 
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,test.ps1

yay3
C:\\test.ps1 : nay4
At line:1 char:41
+ C:\\test.ps1 <<<< 
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,test.ps1

yay5
C:\\test.ps1 : nay6
At line:1 char:41
+ C:\\test.ps1 <<<< 
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,test.ps1

yay7
C:\\test.ps1 : nay8
At line:1 char:41
+ C:\\test.ps1 <<<< 
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,test.ps1

done!

---

这是与和相关的持续工作的一部分。

我建议在另一种编程语言中尝试同样的事情。如果它做同样的事情，它要么是powershell，要么是exec如何在Windows上工作；这有关系吗？您希望发生什么？我希望清楚地了解shell重定向如何影响powershell。我想知道什么时候期望它兑现，什么时候期望它正常运行。Powershell与其他编程语言完全不同。当需要编写一些PS时，我真的必须将自己隔离在powershell中。PS程序是一种完全不同的动物，您所谓的输出重定向实际上是管道操作。说它是“马车”并不准确，你只是在做两件表面上看起来完全相同的完全不同的事情。苹果和桔子。