From: nobu.nokada@...
Date: 2004-04-28T16:43:35+09:00
Subject: Re: popen, popen3, and leftover processes

Hi,

At Wed, 28 Apr 2004 16:08:58 +0900,
Hal Fulton wrote in [ruby-talk:98616]:
> > No need for a pid
> > 
> > Process.wait
> 
> Hmm, but I don't want to wait for it. I want to make sure the process
> dies. I think io.pid may be the way to go.

You don't need to wait for IO.popen, popen'ed IO waits the
child process at close.  However, popen3 spawns child and
grand-child process which the command is executed as, so you
cannot wait the real command.  This restriction is to get rid
of leaving a zombie process.

-- 
Nobu Nakada