my $fh = Tk::IO->new(-linecommand => callback, -childcommand => callback); $fh->exec("command") $fh->wait $fh->kill
In theory C methods which enable non-blocking IO as in earlier Tk-b* release(s) are still there. I have not changed them to use perl's additional Configure information, or tested them much.
Assumption is that exec is used to fork a child process and a callback is called each time a complete line arrives up the implied pipe.
``line'' should probably be defined in terms of perl's input record separator but is not yet.
The -childcommand callback is called when end-of-file occurs.
$fh->wait can be used to wait for child process while processing other Tk events.