You do NOT want to use `fork`.
MoarVM has several threads that are running, and `fork` doesn't handle that.
A simple way is to just use the `start` statement prefix
sub child-process () {
sleep 2;
say 'child says hi'
}
say 'starting child';
start child-process();
for ^10 {
say ++$;
sleep .5;
}
say 'ending program';
Which will result in something like:
starting child
1
2
3
4
child says hi
5
6
7
8
9
10
ending program
The program will exit when the mainline finishes. So if you didn't have the
loop, the program will exit before the child prints anything.
You could directly call `$*SCHEDULER.cue(&child-process)` instead.
Which has adverbs such as `every`, `times`, `at`, `in`, and `catch`
If you use one of the adverbs other than `catch`, it will return
a Cancellation object which would allow you to stop a thread that hasn't
started running yet.
On Tue, Apr 7, 2020 at 4:19 PM yary <not....@gmail.com> wrote:
> They way I remember it (taught to me waaay back when) is that, you fork
> twice, and the grandchild process that lives on becomes a daemon whose
> parent is the system "init" process, PID 1, after the parent and
> 1st-generation child process exit. Found general concept at
> http://www.farhadsaberi.com/perl/2013/02/perl-detach-process-daemon.html
>
> How to implement that in raku, and if it works as intended in Windows...
> is left as an exercise to the reader!
>
> -y
>
>
> On Tue, Apr 7, 2020 at 2:42 PM Paul Procacci <pproca...@gmail.com> wrote:
>
>> https://docs.perl6.org/language/5to6-perlfunc#fork
>> https://docs.perl6.org/type/Thread
>>
>> I haven't tried myself but it's conceivable that you can start a new
>> thread that exec's some external program.
>>
>> On Tue, Apr 7, 2020 at 7:21 AM ToddAndMargo via perl6-users <
>> perl6-us...@perl.org> wrote:
>>
>>> Hi All,
>>>
>>> Can a subroutine be released from the main program
>>> to go off on its own? (Is this called "forked"?)
>>>
>>> If not how do I do a `qqx` or a `run` that releases
>>> the program to go off on its own?
>>>
>>> Many thanks,
>>> -T
>>>
>>
>>
>> --
>> __________________
>>
>> :(){ :|:& };:
>>
>
