From: Masschelein Bart <masschel@...>
Date: 2005-07-05T21:18:06+09:00
Subject: Re: Abort a system call

> 
> With parts of other pieces today on the reflector, I assembled this
> 
> --------
> pid = Process.fork do
>   exec($decoder, $bitstreamPath, $yuvOutputPath)
> end
> 
> trap "SIGINT", proc{ Process.kill("SIGINT", pid); print "^C 
> was pressed. Process id #{pid}\n"  }
> 
> Process.waitpid(pid)
> --------
> 
> The trap gets executed, meaning that I get the output of the 
> print, during the execution of my program, and the pid 
> matches the one from the process status list. However the 
> first part (Process.kill("SIGINT", pid);) is not executed 
> correctly, or at least does not do what I expected, killing 
> the process. Is there another way to kill a process from 
> Ruby? Or do I need another signal # instead of "SIGINT" 
> there? No clue...
> 

For those having similar problems, I just solved it by 

trap "INT", proc{ Process.kill(9, pid)  }

so using a hard kill.

If people have more elegant ways of solving this, let me know!

CU

B