Hello All, I am attempting to allow a perl-Tk program to receive commands from some other program while it is doing its thing. From reading 'Mastering perl Tk' I thought the solution would be to use the fileevent method... 
 
    my $fh = FileHandle->new("> program_ipc_file");
    $fh->close;
    if (-f 'program_ipc_file') {
      $fh = FileHandle->new("tail -f -n 25 program_ipc_file|");
      $widget->fileevent($fh, 'readable', sub {$me->_process_fileevent
+});

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which works fine except that the program will not terminate cleanly. I have to ctrl-c it and some times the tail process is left running. Is there something I can do to close the program properly or is there a cleaner way to perform the IPC (of messaging) required? Thanks for the help Brian Miller

In reply to Perl non-blocking IPC by brian42miller

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