From: Daniel Berger <djberg96@...>
Date: 2007-03-10T06:04:27+09:00
Subject: Getting to the last file in a chain of symlinks

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