From: "Ara.T.Howard" <Ara.T.Howard@...>
Date: 2005-05-26T13:59:02+09:00
Subject: Re: Killing a Process started with Kernel.system

On Thu, 26 May 2005, nobuyoshi nakada wrote:

> Hi,
>
> At Wed, 25 May 2005 03:42:13 +0900,
> Ara.T.Howard wrote in [ruby-talk:143556]:
>>    input, out, err, pid = Open4.popen4(command)
>>
>> it would be great to wrap this up and get it into ruby - that way there would
>> be a standard way to write portable (in some fashion) programs that spawn
>> external commands.  my current project, dirwatch, which watches a directory
>> for events and spawns user defined actions for them needs just such a thing.
>
> That interface feels ugly to me.
>
> Once I thought like:
>
>  child = Process.spawn([cmd, *arg], STDIN=>input, STDOUT=>output, STDERR=>err)
>  Process.waitpid(child.pid)
>
> but not sure yet.

but maybe

   child.wait #=> Process::Status

i have code that does just that.  the reason for open4 is just to provide a
toolset for coding the above ;-)

now that there is a way to get stdin, stdout, stderr, and cid on both windoze
and *nix perhaps a package to do just that could be added to the stdlib?

regards.

-a
-- 
===============================================================================
| email :: ara [dot] t [dot] howard [at] noaa [dot] gov
| phone :: 303.497.6469
| My religion is very simple.  My religion is kindness.
| --Tenzin Gyatso
===============================================================================