1IO(3)                 User Contributed Perl Documentation                IO(3)
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NAME

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

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

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

19       Tk::IO is now layered on perl's IO::Handle class. Interfaces have
20       changed, and are still evolving.
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22       In theory C methods which enable non-blocking IO as in earlier Tk-b*
23       release(s) are still there. I have not changed them to use perl's
24       additional Configure information, or tested them much.
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26       Assumption is that exec is used to fork a child process and a callback
27       is called each time a complete line arrives up the implied pipe.
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29       "line" should probably be defined in terms of perl's input record
30       separator but is not yet.
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32       The -childcommand callback is called when end-of-file occurs.
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34       $fh->wait can be used to wait for child process while processing other
35       Tk events.
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37       $fh->kill can be used to send signal to child process.
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BUGS

40       Still not finished.  Idea is to use "exec" to emulate "system" in a
41       non-blocking manner.
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45perl v5.28.1                      2019-02-12                             IO(3)