From: sundar sundar <lists@...>
Date: 2013-03-29T03:49:12+09:00
Subject: Find usb properties/details using ruby-dbus and udisk

I am doing project in which i need to detect all available usb drives
and its info. Mainly i am interested in USB device (flash drive and
external hard disk), mount point, uuid, total size, available space,
label, and is the usb mounted or not. I thought ruby-dbus would be
better to go with udisk. So installed with out an error. However i am
unable to proceed further. I need to use this on linux. Here is the
sample code

#!/usr/bin/env ruby
require 'rubygems'
require 'dbus'
bus = DBus::SystemBus.instance
rb_service = bus.service("org.freedesktop.UDisks")
rb_udisk = rb_service.object("/org/freedesktop/UDisks")
rb_udisk.introspect
rb_udisk_iface = rb_udisk["org.freedesktop.UDisks.Device"]
puts rb_udisk_iface.DeviceIsRemovable

However i get this error
undefined method `DeviceIsRemovable' for nil:NilClass (NoMethodError)
which i don't understand. Could some one help me on this?
Useful links:-
ruby-usb
https://github.com/mvidner/ruby-dbus/blob/master/doc/Tutorial.md
udisk
http://udisks.freedesktop.org/docs/1.0.5/Device.html#Device:DeviceFile
python and udisk
http://mindbending.org/en/python-and-udisks-part-5
http://stackoverflow.com/questions/5067005/python-udisks-enumerating-device-information

Any help is appreciated.

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