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NAMETk::IO - high level interface to Tk's 'fileevent' mechanismSYNOPSISmy $fh = Tk::IO->new(-linecommand => callback, -childcommand => callback); $fh->exec("command") $fh->wait $fh->kill WARNINGINTERFACES TO THIS MODULE MAY CHANGE AS PERL'S IO EVOLVES AND WITH PORT OF TK4.1DESCRIPTIONTk::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. BUGSStill not finished. Idea is to use "exec" to emulate "system" in a non-blocking manner.
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