"IO::Async::Signal" - event callback on receipt of a POSIX signal

       Paul Evans <leonerd@leonerd.org.uk>

perl v5.40.1                                       2025-05-17                             IO::Async::Signal(3pm)

       This subclass of IO::Async::Notifier invokes its callback when a particular POSIX signal is received.

       Multiple objects can be added to a "Loop" that all watch for the same signal.  The callback functions
       will all be invoked, in no particular order.

       The following events are invoked, either using subclass methods or CODE references in parameters:

   on_receipt
       Invoked when the signal is received.

       "IO::Async::Signal" - event callback on receipt of a POSIX signal

       The following named parameters may be passed to "new" or "configure":

   name=>STRING
       The name of the signal to watch. This should be a bare name like "TERM". Can only be given at
       construction time.

   on_receipt=>CODE
       CODE reference for the "on_receipt" event.

       Once constructed, the "Signal" will need to be added to the "Loop" before it will work.

          use IO::Async::Signal;

          use IO::Async::Loop;
          my $loop = IO::Async::Loop->new;

          my $signal = IO::Async::Signal->new(
             name => "HUP",

             on_receipt => sub {
                 print "I caught SIGHUP\n";
             },
          );

          $loop->add( $signal );

          $loop->run;