Tk::IO - high level interface to Tk's 'fileevent' mechanism

- NAME
- SYNOPSIS
- WARNING
- DESCRIPTION
- BUGS

# NAME

Tk::IO - high level interface to Tk's 'fileevent' mechanism

# SYNOPSIS

      my $fh = Tk::IO->new(-linecommand => callback, -childcommand => callback);
      $fh->exec("command")
      $fh->wait
      $fh->kill

# WARNING

INTERFACES TO THIS MODULE MAY CHANGE AS PERL'S IO EVOLVES AND WITH PORT OF TK4.1

# DESCRIPTION

Tk::IO is now layered on perl's IO::Handle class. Interfaces have changed, and are still evolving.

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.

$fh->kill can be used to send signal to child process.

# BUGS

Still not finished. Idea is to use ``exec'' to emulate ``system'' in a non-blocking manner.

Tk::IO - high level interface to Tk's 'fileevent' mechanism