From: "Kent S." <ksibilev@...>
Date: 2004-03-30T04:22:48+09:00
Subject: Re: Ruby/DL and output char* parameter

Check out this:  
http://blade.nagaokaut.ac.jp/cgi-bin/vframe.rb/ruby/ruby-talk/94741? 
94522-95545

Cheers,
Kent.

On Mar 29, 2004, at 2:02 PM, Aredridel wrote:

> I'm trying to wrap the xattr system calls with Ruby/DL (mostly to learn
> Ruby/DL, but I do need to be able to read xattrs eventually)
>
> My code looks like so:
>
> require 'dl'
> require 'dl/import'
>
> module Xattr
>   extend DL::Importable
>   dlload "libattr.so"
>   extern "int attr_get(const char*, const char *, char *, int *, int)"
> end
>
> i=[1000]
> Xattr.attr_get('.', 'user.description', s, i, 0)
> puts s
>
> The problem is, "s" isn't set to the result, which is returned as the
> third parameter. Is there a way to get what was returned in this case?
>
> Ari
>