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CentOS 7.0 - man page for tk::io (centos section 3)

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IO(3)			       User Contributed Perl Documentation			    IO(3)

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.

perl v5.16.3				    2014-06-10					    IO(3)
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