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

NAME  SYNOPSIS  WARNING  DESCRIPTION  BUGS 

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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.

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