IO - Online Linux Manual Page

Section : 3pm
Updated : 2020-11-09
Source : perl v5.32.0
Note : User Contributed Perl Documentation
NAMETk::IO − high level interface to Tk's 'fileevent' mechanism
SYNOPSIS​ my $fh = Tk::IO−>new(−linecommand => callback, −childcommand => callback); ​ $fh−>exec("command") ​ $fh−>wait ​ $fh−>kill
WARNING​INTERFACES TO THIS MODULE MAY CHANGE AS PERL'S IO EVOLVES AND WITH PORT OF TK4.1
DESCRIPTIONTk::IO is now layered on perl's IO::Handle class. Interfaces have changed, and are still evolving. In theory C methods which enable non-blocking IO as in earlier Tk−b* release(s) are still there. I have not changed them to use perl's additional Configure information, or tested them much. Assumption is that exec is used to fork a child process and a callback is called each time a complete line arrives up the implied pipe. ​‟line” should probably be defined in terms of perl's input record separator but is not yet. The −childcommand callback is called when end-of-file occurs. ​$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. 0
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