From: nobu.nokada@...
Date: 2002-10-17T11:21:35+09:00
Subject: Re: fork and exec

Hi,

At Thu, 17 Oct 2002 08:26:09 +0900,
Meng, Ted <mengx@tvratings.com> wrote:
> system "mkfifo ttt"
> pid = fork
> exec ("cat < ttt") if pid.nil?

exec ("exec cat < ttt") if pid.nil?

> I would expect only one process the real "cat process", but apparently, ruby
> spawned 
> a process and then a child process, which is the real one.

When you use redirection, ruby invokes /bin/sh and /bin/sh
forks to execute the command.

-- 
Nobu Nakada