Read Registry on Windows 7 64bit

Developers Ruby API
#1

Can anyone tell me what is wrong with this method? I’ve been using this to generate a machine ID, and it was working fine for a long time. Now I have a customer with a windows 7 64 machine and gives and error. I don’t have the exact error but something about a sketchup/tools/win32/registry.rb not found.

Does anyone have a windows 7 machine to test this on?

    def computer_system_uuid(testing = false)
      if Sketchup.platform == :platform_osx
        `ioreg -ad2 -c IOPlatformExpertDevice | xmllint --xpath '//key[.="IOPlatformUUID"]/following-sibling::*[1]/text()' -`
      else
        require 'win32/registry'
        key  = 'SYSTEM\HardwareConfig'
        uuid = ''
        config = ''
        hardware = nil
        begin
          hardware = Win32::Registry::HKEY_LOCAL_MACHINE.open(key)
          return '' if hardware.nil?

          config = hardware['LastConfig']
        rescue StandardError => e
          puts e.inspect
        else
          begin
            keys = hardware.keys
            puts keys.inspect if testing
            uuid = config[/[^{}]+/] if keys.include?(config)
          rescue StandardError => e
            puts e.inspect
          else
            uuid
          end
        ensure
          hardware.close unless hardware.nil?
        end
        uuid
      end
    end
#2

The "win32" folder is at this path (the first in the $LOAD_PATH array):
"C:/Program Files/SketchUp/SketchUp 20nn/Tools/RubyStdLib"
(where nn is the major version number.)

However, the standard library was only distributed with SketchUp 2014 and higher.

I do not get any error running require 'win32/registry' at the console, and afterward Win32 is accessible. (if defined?(Win32) would be the simplest test post require to see that the library was loaded.)

#3

OK it seems like to problem is that the registry key doesn’t exist.

Here is the error.

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#4

Now I just need to find a way to get a machine ID on windows 7.

#5

I believe that when dealing with the registry, you need to use double backslashes …

key  = 'SYSTEM\\HardwareConfig'
#6

EDIT: Works on my (Win10) machine …

key  = 'SYSTEM\\HardwareConfig'

hardware = Win32::Registry::HKEY_LOCAL_MACHINE.open(key)
#<Win32::Registry:0x0000023c86d0ea20>

hardware.class
#=> Win32::Registry
#7

On my machine it works with a single or double backslash. Are you on windows 7? Does a single backslash fail on your machine?

#8

Win10. My Win 7 machine is packed away in the closet. (And I removed all SU installs from it.)

#9

OK the only machine I was having a problem with is a win 7 machine. I’m trying to get a win 7 VM running, but that isn’t a 5 minute project either.

#10

NOTE: This is a continuation of …

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#11

Sorry I couldn’t find the original thread (because I didn’t look :face_with_monocle:).

Posted solution here:

1 Like