Mac OS external drives eject tool

usb_eject.rb

#!/usr/bin/env ruby

# External USB drives eject tool.
# You should install growlnotify to get notifications from http://growl.info/extras.php#growlnotify
# It will eject all USB disks and all mounted images. It will warn you with a red icon if something goes wrong
# It starts from the bottom to the top to tentavily eject the mounted images before the drive they could be on.
# 
# Advices:
# - Use Automator to make this script an app
# - Install Better Touch Tool (http://www.boastr.de/) to give it a global shortcut

# Copyright (C) <2011> <Simon Jodet>
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
# of the Software, and to permit persons to whom the Software is furnished to do
# so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

require "open3"

drives = Array.new()

cmd = 'diskutil list'
stdin, stdout, stderr = Open3.popen3(cmd)
stdout = stdout.readlines

stdout.each { |line| 
  if line[0,4] == '/dev'
    drives << line
  end
}

if !drives.empty?
  drives = drives.reverse
  drives.each { |drive| 
    cmd = 'diskutil info ' + drive
    stdin, stdout, stderr = Open3.popen3(cmd)
    stdout = stdout.readlines
    if !stdout.empty?
      volume_name = drive
      stdout.each { |line| 
        if !line.index('Media Name:').nil?
          pos = line.index(':')+1
          volume_name = line.slice(pos,line.length-pos).strip
        end
        if !line.index('Protocol:').nil? and (!line.index('USB').nil? or !line.index('Disk Image').nil?)
          if !line.index('Disk Image').nil?
            image_cmd = 'diskutil info ' + drive.strip + 's2'
            image_stdin, image_stdout, image_stderr = Open3.popen3(image_cmd)
            image_stdout = image_stdout.readlines
            image_stdout.each { |image_line| 
              if !image_line.index('Volume Name:').nil?
                pos = image_line.index(':')+1
                volume_name = image_line.slice(pos,image_line.length-pos).strip
              end
            }
          end
          cmd = 'hdiutil detach ' + drive.strip
          stdin, stdout, stderr = Open3.popen3(cmd)
          stdout = stdout.readlines
          stderr = stderr.readlines
          if !stderr.empty?
            Open3.popen3('/usr/local/bin/growlnotify -m"' + volume_name + ' could NOT be detached: \"' + stderr.to_s.strip + '\"" --image "/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/AlertStopIcon.icns" USB Eject')
            sleep 1
            next
          else
            Open3.popen3('/usr/local/bin/growlnotify -m"' + volume_name + ' has been detached" --image "/System/Library/CoreServices/CoreTypes.bundle/Contents/Resources/EjectMediaIcon.icns" USB Eject')
            sleep 1
            next
          end
        end
      }
    end
  }
end