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README  view on Meta::CPAN

    There are some traps for the unwary relating to buffers and deadlocks,
    IPC::Open3 is recommended reading.

    If you register a call back for on_exit, but not on_error then use a
    condition variable to wait for the process to complete as in this:

     my $cv = AnyEvent->condvar;
     my $ipc = AnyEvent::Open3::Simple->new(
       on_exit => sub { $cv->send },
     );
     $ipc->run('command_not_found');
     $cv->recv;

    You might be waiting forever if there is an error starting the process
    (if for example you give it a bad command). To handle this situation
    you might use croak on the condition variable in the event of error:

     my $cv = AnyEvent->condvar;
     my $ipc = AnyEvent::Open3::Simple->new(
       on_exit => sub { $cv->send },
       on_error => sub {
         my $error = shift;
         $cv->croak($error);
       },
     );
     $ipc->run('command_not_found');
     $cv->recv;

    This will cause the recv to die, printing a useful diagnostic if the
    exception isn't caught somewhere else.

SEE ALSO

    AnyEvent::Open3::Simple::Process

      Represents a process being run by this module, typically passed into

lib/AnyEvent/Open3/Simple.pm  view on Meta::CPAN

L<IPC::Open3> is recommended reading.

If you register a call back for C<on_exit>, but not C<on_error> then
use a condition variable to wait for the process to complete as in
this:

 my $cv = AnyEvent->condvar;
 my $ipc = AnyEvent::Open3::Simple->new(
   on_exit => sub { $cv->send },
 );
 $ipc->run('command_not_found');
 $cv->recv;

You might be waiting forever if there is an error starting the
process (if for example you give it a bad command).  To handle
this situation you might use croak on the condition variable
in the event of error:

 my $cv = AnyEvent->condvar;
 my $ipc = AnyEvent::Open3::Simple->new(
   on_exit => sub { $cv->send },
   on_error => sub {
     my $error = shift;
     $cv->croak($error);
   },
 );
 $ipc->run('command_not_found');
 $cv->recv;

This will cause the C<recv> to die, printing a useful diagnostic
if the exception isn't caught somewhere else.

=head1 SEE ALSO

=over 4

=item L<AnyEvent::Open3::Simple::Process>