From: ara.t.howard@...
Date: 2006-07-12T07:01:20+09:00
Subject: Re: killing off a process tree

On Wed, 12 Jul 2006, Erich Lin wrote:

> Is there a command in ruby that when given the pid , it will terminate
> all children processes of that pid including itself.
>
> It seems that Process.kill(9, pid) only kills the parent and not the
> children.


harp:~ > ri Process.kill
----------------------------------------------------------- Process#kill
      Process.kill(signal, pid, ...)    => fixnum
------------------------------------------------------------------------
      Sends the given signal to the specified process id(s), or to the
      current process if _pid_ is zero. _signal_ may be an integer signal
      number or a POSIX signal name (either with or without a +SIG+
      prefix). If _signal_ is negative (or starts with a minus sign),
      kills process groups instead of processes. Not all signals are
      available on all platforms.

         pid = fork do
            Signal.trap("HUP") { puts "Ouch!"; exit }
            # ... do some work ...
         end
         # ...
         Process.kill("HUP", pid)
         Process.wait

      _produces:_

         Ouch!

-a
-- 
suffering increases your inner strength.  also, the wishing for suffering
makes the suffering disappear.
- h.h. the 14th dali lama