From: Joel VanderWerf <vjoel@...>
Date: 2004-05-14T05:51:45+09:00
Subject: Re: popen3 on windows

Park Heesob wrote:
> Hi,
> 
> 
>>
>>What's the status of popen3 on windows?
>>
>>I tried using win32_popen (from RAA) today with the 1.8.1-13 installer,
>>but it breaks when I try to read from or write to the IO objects.
>>
>>Does anyone have a good alternative that works on windows? I need to
>>control an ssh subprocess.
>>
>>
> 
> The Ruby 1.8.1-13 installer was compiled with MS VC++ 7.x.
> But the library win32_popen.so was compiled with MS VC++ 6.x.

Good to know that. I've downloaded the free compiler tools from MS so I 
can build extensions to work with 1.8.1-13.

> I uploaded http://home.nownuri.net/~phasis/popen/win32_popen_1.8.1.zip
> It includes win32_popen.so comiled with MS VC++7.x.

I'm puzzlied, why does VC generate a .so instead of a .dll? Oh well, 
ruby seems to load it with no problem.

More significantly, I'm having trouble reading from a pipe:

C:\win32_popen_1.8.1>irb -r win32_popen
irb(main):001:0> pin, pout, perr = IO.win32_popen3("dir")
=> [#<IO:0x2c2e8f0>, #<IO:0x2c2e8d8>, #<IO:0x2c2e8c0>]
irb(main):002:0> pout.read
Errno::EBADF: Bad file descriptor
         from (irb):2:in `read'
         from (irb):2

The equivalent works with Open3.popen3 on linux. Am I doing something wrong?