From: nobu.nokada@...
Date: 2002-05-24T22:02:13+09:00
Subject: Re: OS independent scripts, system calls on Windows and Linux

Hi,

At Fri, 24 May 2002 21:26:54 +0900,
Tobias Reif wrote:
> Then I might think about an RCR for a feature which saves me from
> writing stuff like
> 
> [ http://ruby-talk.com/9739 ]
> ...
>   if ENV.has_key?("OS") && ENV["OS"] =~ /nt/i
>                 puts "It's either NT or 2K, use 'cmd.exe /c '" if $DEBUG
>                 #it's either NT or Win2K
>                 command_shell = "cmd.exe /c "
> ...
> 
> What do people think?

Do you want to run internal commands of cmd.exe?  It's
definitely system dependent.  For external commands,
mingw32/mswin32 ruby runs a child process directly instead.

> I'd like to have a way more platform independent system call
> mechanism, in Ruby itself or in the std lib, which returns either nil,
> an Error object of some sort, or a Stdout object of some kind, so I
> can simply write something like
> 
> commands = Commands.new ['this -x -y','that -a -b']
> commands.each do |cmd|
>    returned = cmd.issue # or ".run", ".enter", ...
>    case returned
>      when Stderr then raise returned
>      when Stdout then puts  returned
>    end
> end

I'm not sure what you mean by Stderr and Stdout.  Something
other than streams?

-- 
Nobu Nakada