IO::Async::PID - event callback on exit of a child process
IO::Async::PID
use IO::Async::PID; use POSIX qw( WEXITSTATUS ); use IO::Async::Loop; my $loop = IO::Async::Loop->new; my $kid = $loop->fork( code => sub { print "Child sleeping..\n"; sleep 10; print "Child exiting\n"; return 20; }, ); print "Child process $kid started\n"; my $pid = IO::Async::PID->new( pid => $kid, on_exit => sub { my ( $self, $exitcode ) = @_; printf "Child process %d exited with status %d\n", $self->pid, WEXITSTATUS($exitcode); }, ); $loop->add( $pid ); $loop->run;
This subclass of IO::Async::Notifier invokes its callback when a process exits.
For most use cases, a IO::Async::Process object provides more control of setting up the process, connecting filehandles to it, sending data to and receiving data from it.
The following events are invoked, either using subclass methods or CODE references in parameters:
Invoked when the watched process exits.
The following named parameters may be passed to new or configure:
new
configure
The process ID to watch. Must be given before the object has been added to the containing IO::Async::Loop object.
CODE reference for the on_exit event.
on_exit
Once the on_exit continuation has been invoked, the IO::Async::PID object is removed from the containing IO::Async::Loop object.
$process_id = $pid->pid
Returns the underlying process ID
$pid->kill( $signal )
Sends a signal to the process
Paul Evans <leonerd@leonerd.org.uk>
To install IO::Async, copy and paste the appropriate command in to your terminal.
cpanm
cpanm IO::Async
CPAN shell
perl -MCPAN -e shell install IO::Async
For more information on module installation, please visit the detailed CPAN module installation guide.