From: AdSR <artur_spruce@...>
Date: 2007-03-10T05:45:06+09:00
Subject: Re: Getting to the last file in a chain of symlinks

On 9 Mar, 20:10, "Daniel Berger" <djber...@gmail.com> wrote:
> Hi all,
>
> Here's a little code snippet I thought I'd share. It follows a chain
> of symlinks until you get down to the "real" file. Anyone got a better
> approach?
>
> # On Solaris 10, Sunblade 150
> #
> # /dev/fd0      -> fd0c
> # /dev/fd0c     -> diskette0
> # /dev/diskett0 -> ../devices/pci@1f,0/isa@7/dma@0,0/floppy@0,3f0:c
> #
>
> file = '/dev/fd0'
>
> while true
>    Dir.chdir(File.dirname(file))
>    file = File.expand_path(File.readlink(file))
>    break unless File.symlink?(file)
> end
>
> puts file # /devices/pci@1f,0/isa@7/dma@0,0/floppy@0,3f0:c
>
> Regards,
>
> Dan

require 'pathname'

puts Pathname.new('/dev/fd0').realpath

I didn't check what would happen for cyclic dependencies.

Regards,
AdSR