Find computer uuid

[Juantxo]

I would like to find motherboard UUID. I almost did, but in Windows SU2014 I must use

...force_encoding("utf-16le")...

I don't know why and the worst, now one SU2014 Windows user is reporting:

Error: #<ArgumentError: unknown encoding name - utf-16le>

Someone have an idea about why sometimes not work in Windows, or have a best method to find UUID?

Code to find UUID:
MAC OS:
uuid = %x(ioreg -l | awk '/IOPlatformSerialNumber/ { print }')
WIN:
#RUBY_VERSION 1.8
cmd="wmic csproduct get uuid" uuid = %x(#{cmd})

#RUBY_VERSION 2.0 (workaround to fix the backquotes bug included):

cmd="wmic csproduct get uuid" filename = ENV["TMP"].encode("utf-8") + "\\backquote.out" exec_string = "" + cmd + " > " + filename + "" exec_string.gsub! '\\', '/' eval("#{exec_string}") contents = File.read(filename) uuid= contents.force_encoding("utf-16le").encode('UTF-8') uuid.slice!(0)

[Juantxo]

Thanks to Driven and Dan.
I will use new notation instead use force_encoding. I think now it should works...

#UUID in RUBY 2.0 WINDOWS
` cmd="wmic csproduct get uuid"
filename = File.join(ENV["TMP"],"backquote.out")

exec_string = "`" + cmd + " > " + filename + "`"
exec_string.gsub! '\\', '/'
eval("#{exec_string}")

uuid=""
open(filename, "r:BOM|utf-16le:UTF-8") do |io|
	uuid = io.read
end`