From: Eleanor McHugh <eleanor@...>
Date: 2010-11-23T22:33:39+09:00
Subject: Re: system() or process.create?

On 23 Nov 2010, at 03:08, Fengfeng Li wrote:
> The other problem is, if I use Process.create to unzip some file
> firstly, and then use Process.create to do some other things to the
> new-unzip files secondly, the second application sometimes failed, I
> think maybe because the first unzip process is still processing? How to
> avoid this? Thanks:)

If you want to force several processes to run sequentially then you should issue waitpid calls after launching each one so that they're only launched as the previous process is completed. A more elegant alternative would be to launch a single process which piped the output of each command into the next and let the OS work out the details for you, but that's dependent on the command you're running being pipe friendly.


Ellie

Eleanor McHugh
Games With Brains
----
raise ArgumentError unless @reality.responds_to? :reason