Obtain an interactive command's output during interaction

Maybe you can just pipe the sequences of lines that start with <html... and end with </html... to that lynx (or maybe better elinks or w3m) command.

Like:

#! /usr/bin/perl
while (<<>>) {
  if (!$inhtml && m{<html}i) {
    $inhtml = 1;
    open HTML, "|-", qw(elinks -dump);
  }

  print {$inhtml ? HTML : STDOUT}  $_;

  if ($inhtml && m{</html}i) {
    close HTML;
    $inhtml = 0;
  }
}

(and sdcv MYWORD | that-script)

This ended working for me, the answer was a painful journey through expect. I have no doubt there's room for improving this code, so feel free to leave your suggestions!

#!/usr/bin/expect -f

set arg1 [lindex $argv 0]
spawn sdcv $arg1

expect "Found*" {

    expect "Your choice*" {
        expect_user -re "(.*)\n"

        set user_input $expect_out(0,string)
        send "$user_input\r"

        expect "#"
        set output $expect_out(buffer)

        set command "echo \"$output\" | lynx --dump --stdin"

        spawn bash
        expect "*"

        send "$command\r"
        expect "$command\r\n"

        expect eof
    }

    #for some reason gets saved to expect_out(0,string) when we input a word with a single match
    set output $expect_out(0,string)
    set command "echo \"$output\" | lynx --dump --stdin"

    spawn bash

    send "$command\r"
    expect "$command\r\n"

    expect eof
}