From: Laurent Julliard <laurent@...>
Date: 2004-10-23T15:05:24+09:00
Subject: Re: [Q] Problem with popen on WIn32 (1.8.x)

Robert Klemme wrote:
> 
> "Laurent Julliard" <laurent@moldus.org> schrieb im Newsbeitrag 
> news:417979EB.7090107@moldus.org...
> 
>> Can anybody tell me why the following Ruby code that uses popen 
>> doesn't work at all on my Windows XP (Pro  SP1) machine, ruby 1.8.2 
>> preview2 or 1.8.1?
>>
>> you.rb
>> ------
>> while true
>>   sleep 1
>>   puts "This line should print in me.rb"
>> end
>>
>> me.rb
>> -----
>> pig = IO.popen("ruby.exe you.rb", "w+")
>>
>> while true
>>   pig.gets
>> end
>>
>> Launch me.rb and you'll see that no output is showing at all. On Linux 
>> it works like a charm.
>>
>> If you succeed in making this work can you tell me which version of 
>> Ruby and Windows you are using?
>>
>> Thanks for all your help
> 
> 
> :-)))  You forgot the "puts" in me.rb.  For me, this works:
> 
> you.rb
> 
> while true
>   sleep 1
>   puts "This line should print in me.rb"
> end
> 
> 
> me.rb
> 
> pig = IO.popen("ruby.exe you.rb", "w+")
> 
> while true
>   puts pig.gets
> end
> 

I forgot the puts while copy-pasting the code but even with the puts 
it doesn't make any difference. It still doesn't work on 1.8.2 preview 
2/XP. Which version on Ruby/Windows are you using?

Laurent

-- 
Laurent JULLIARD
http://www.moldus.org/~laurent