如何使用Perl中的Backticks在两个不同的变量中捕获STDOUT和STDERR [英] How to capture both STDOUT and STDERR in two different variables using Backticks in Perl

问题描述

假设我想从脚本中运行一个外部程序，同时我想捕获STDOUT和STDERR，但在两个不同的变量。我该怎么办？对于istance，如果我运行这个脚本...

  my $ cmd =`snmpwalk -v $ version -c $ community $ hostname $ oid`; 
  

...如果没有错误，一切都正常工作，但如果命令提出错误此错误将在命令行上打印，我不希望发生这种情况。我想捕获错误，以及。无需在屏幕上打印。任何想法？

解决方案

在Perl常见问题中，您有不同的选项，
$ b

http://perldoc.perl.org/perlfaq8.html#How-can-I-capture-STDERR-from-an-external-command%3f

Let's say I want to run an external program from my script with backticks and at the same time I want to capture both STDOUT and STDERR but in two different variables. How can I do that? For istance if I run this script...

my $cmd = `snmpwalk -v $version -c $community $hostname $oid`;

...if there is no error everything works just fine BUT if the command raise an error this error will be printed on the command line and I don't want that to happen. I want to capture the error as well. Nothing has to be printed on the screen. Any ideas?

解决方案

In the Perl FAQ you have different options depending how do you want to proceed:

http://perldoc.perl.org/perlfaq8.html#How-can-I-capture-STDERR-from-an-external-command%3f

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