size of expect buffer

[tomdagliusa]

I have a test which is failing, and I think it is due to the match not occuring within the size of the expect buffer. I tried changing the size using the match_max command, but it doesn't seem to be working. Is this the right command, or is another available?

Thanks,
Tom

 

[AviaTraining]

The match_max command is the one you want. To test out whether expect is really discarding buffer contents because it filled up, you can also try adding a [tt]full_buffer[/tt] pattern to your expect command, at least for testing purposes. See page 151 in the "Exploring Expect" book for more information, but basically if the [tt]full_buffer[/tt] pattern matches, Expect dumps all of the unmatched input into expect_out(buffer):

expect {
    $mypattern  {
        myaction
    }

    full_buffer {
        # The buffer filled up without matching a pattern.
        # The buffer was dumped into expect_out(buffer).

        puts "Unmatched input: $expect_out(buffer)"
    }
}

You might also want to turn on Expect's diagnostics to see what it really is and isn't matching. To do so, execute exp_internal 1. ("Exploring Expect" page 166 and beyond.) Just be aware that exp_internal generates a lot of output!

- Ken Jones, President, ken@avia-training.com
Avia Training and Consulting,

http://www.avia-training.com

866-TCL-HELP (866-825-4357) US Toll free
415-643-8692 Voice
415-643-8697 Fax