I have some perl that captures the output from a command, e.g.: $output = `$cmd`; I'd like to capture the output from stderr as well though, without redirecting stderr to a file on disk--I'd like to redirect it to an array. How would I do that?

IPC::Run3 lets you do this very easily.

use IPC::Run3;

my ( @out, @err );
run3 [ $command ], undef, \@out, \@err;

print map { "STDOUT = $_" } @out;
print map { "STDERR = $_" } @err;
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