Linux cli command Tk_IOpm

➡ A Linux man page (short for manual page) is a form of software documentation found on Linux and Unix-like operating systems. This man-page explains the command Tk_IOpm and provides detailed information about the command Tk_IOpm, system calls, library functions, and other aspects of the system, including usage, options, and examples of _. You can access this man page by typing man followed by the Tk_IOpm.

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NAME 🖥️ Tk_IOpm 🖥️

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.

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