From: Nate Murray <jashmenn@...>
Date: 2006-11-21T05:15:07+09:00
Subject: Re: fork, trap and exec. Pickaxe typo?

Another question, trap("CLD") should be called even with a non-zero
exit status, correct?

FYI, I am running under MacOSX 10.4

$ ruby --version
ruby 1.8.4 (2005-12-24) [i686-darwin8.6.1]



Nate Murray wrote:
> Hey All, I got this code straight from the PickAxe:
>
> trap("CLD") {
>   pid = Process.wait
>   puts "Child pid #{pid}: terminated"
>   exit
> }
>
>
> exec("echo 'hello world'") if fork == nil
>
> But it doesnt word!
> The CLD trap'ped call never executes.
>
>
> Another question... If I perform the exec 4 times the trap call back
> should be called four times, right?
>
> So this code:
>
> trap("CLD") {
>   pid = Process.wait
>   puts "Child pid #{pid}: terminated"
>   exit
> }
>
> 1.upto(4) do
>   exec("echo \"hello $HOSTNAME #{Process.pid}\n\" ; sleep 5") if
> fork.nil?
> end
>
> Should call trap("CLD") four times, right?
> 
> Thanks for your help in advance.