IO(3) User Contributed Perl Documentation IO(3)NAMETk::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
DESCRIPTIONTk::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 addi‐
tional 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 sepa‐
rator 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.
perl v5.8.8 2004-02-28 IO(3)
