I have not looked at the actual source for Expect.pm, but according to the
pod info the send method does not indicate that it returns any value.
Perhaps there is a better way, but the only thing that comes to mind is to wrap your called script inside a shell script, which then prints the exit status. You can then use $exp->expect to look at it
wrapper.sh:
#! /bin/bash
dummp.pl # may need full/relative path here
echo $?
modified example:
my $result = $exp->send("exec wrapper.sh");
$exp->expect (5, [qr/1/, sub {<handle failure>}],
[qr/0/, sub {<handle success>}],
...);
...
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