Two calls to last doesn't look right. Maybe one of these should be a next?

        if ($! == EAGAIN()) {
            print "\nEAGAIN is set\n";
            last;
        } else {
            last;
        }

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In reply to Re: use sysread to read non-blocking filehandle by RichardK
in thread use sysread to read non-blocking filehandle by x12345

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