From: "Simon Kröger" <SimonKroeger@...>
Date: 2005-09-15T05:28:03+09:00
Subject: Re: IO like object

Logan Capaldo wrote:
> 
> 
> On Sep 11, 2005, at 6:46 PM, Alex Fenton wrote:
> 
>> Hi Simon
>>
>> Nice job on finding a solution to unwanted command prompts with  popen()
>> and backticks on win32.
>>
>> Guessing this is on the same track, perhaps the standard 'stringio'  
>> library
>> could be used to supply IO-esque methods to string input and output  from
>> Win32API calls?
>>
>> alex
>>
>> Simon Kr�ger wrote:
>>
>>> Hi List,
>>> i have an IO like object (in this case win32 pipes, connected to a  
>>> child process). If i can provide a read and write method is there  a 
>>> way to get all the other IO methods for free? (like getc, each,  
>>> each_byte, print, printf....)
>>> cheers
>>> Simon
>>>
>>
> Have you considered creating a subclass from IO and defining the  
> necessary methods?

'considered' is the right word. I just don't know which would be the 
necessary methods. In fact (but without looking at the code yet) i realy 
have the feeling most of them are directly mapped to the C equivalents.
If this is the case one would have to code them all from scratch.

In the meantime i figured out how to create real ruby IO objects from 
these pipes - but this does not work on ruby < 1.8.3 :-/
(The methods are there at least since 1.6 but they state 'no such file')

BTW (and to give credits):  There is a C extension on

http://rubyforge.org/projects/win32utils/

called open3 which should be able to do the same. (but i would like a 
solution without having to start a compiler)

Conclusion: use 1.8.3 or the win32utils.
(if someone could figure out why IO.new doesn't like my pipes in ruby < 
1.8.3 i would be happy of course)

cheers

Simon