how do you capture multiline output from a perl `command` call?

I have a perl script that I can pass arguments to from the command line and it will output the 开发者_如何学Pythonresults. I have tried to capture those results:

$systemReturn = `$cmd`;

with only a response of an empty string. I know this file outputs a multi-line string. Obvously there is a diffirent method needed to capture it. Does anyone know how I would get this done?

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The command probably outputs to stderr, not stdout. Try

$systemReturn = `$cmd 2>&1`;

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I would recommend checking up on Capture::Tiny or IO::CaptureOutput as well. It makes it easier and more portable to catch the output, split or join STDOUT and STDERR, check for success, and even tee.

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Use this

@systemReturn = `$cmd`;