1IO(3)                 User Contributed Perl Documentation                IO(3)
2
3
4

NAME

6       Tk::IO - high level interface to Tk's 'fileevent' mechanism
7

SYNOPSIS

9         my $fh = Tk::IO->new(-linecommand => callback, -childcommand => callback);
10         $fh->exec("command")
11         $fh->wait
12         $fh->kill
13

WARNING

15       INTERFACES TO THIS MODULE MAY CHANGE AS PERL'S IO EVOLVES AND WITH PORT
16       OF TK4.1
17

DESCRIPTION

19       Tk::IO is now layered on perl's IO::Handle class. Interfaces have
20       changed, and are still evolving.
21
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.
25
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.
28
29       "line" should probably be defined in terms of perl's input record
30       separator but is not yet.
31
32       The -childcommand callback is called when end-of-file occurs.
33
34       $fh->wait can be used to wait for child process while processing other
35       Tk events.
36
37       $fh->kill can be used to send signal to child process.
38

BUGS

40       Still not finished.  Idea is to use "exec" to emulate "system" in a
41       non-blocking manner.
42
43
44
45perl v5.36.0                      2023-01-20                             IO(3)