Get MAC Address

tt_su

@dan rathbun said:

But... the TMP/TEMP directory is in the user path, and IF the username has unicode characters, then older versions on PC have problems.

On the machines I tested this on the ENV variable would return DOS 8.3 short filepaths for the temp paths - and that works for Ruby 1.8 since they call the ASCII versions of the Windows file functions that can handle that.

That said, there's always a change that ENV variables might be altered by someone, but it has worked fine for several years.

In theory you could use Win32 API calls under Ruby 1.8 to get short 8.3 filepaths and pass that to the Ruby File methods.

Garry K

@tt_su said:

This is one of those areas where you probably would end up with code branching for the different ruby interpreters.

Then branching it is.


      mac_addr = []
      cmd = @@windows ? 'ipconfig /all' ; 'ifconfig'

      # choose lines that have only six pairs of 2 char hex values separated by either a ; or -
      regex = Regexp.compile('(..[;-]){5}..')

      if (RUBY_VERSION[0..2] == '1.8')
        lines = %x[#{cmd}].split("\n").grep(regex)
        lines.each { |line| mac_addr << (line.strip[-17, 17]).upcase().gsub(/-/, ';') }
      else
        temp_path = File.expand_path(ENV['TMPDIR'] || ENV['TMP'] || ENV['TEMP'])
        tempfile = File.join(temp_path, 'temp.txt')

        `#{cmd} > #{tempfile}`
        File.open(tempfile, 'r') do |file|
          lines = file.grep(regex)
          lines.each { |line| mac_addr << (line.strip[-17, 17]).upcase().gsub(/-/, ';') }
        end
        File.unlink(tempfile)
      end

Dan Rathbun

similar:
ipa = %x[ipconfig /all].split("\n").grep /\A\s*(Physical Address)/

The regular expression means:
\A start of line
\s* one or more space characters
and the parens group the string

returns:

[
  "   Physical Address. . . . . . . . . ; XX-XX-XX-ED-C2-XX",
  "   Physical Address. . . . . . . . . ; 00-XX-XX-ED-C2-XX",
  "   Physical Address. . . . . . . . . ; XX-XX-XX-E5-20-XX",
  "   Physical Address. . . . . . . . . ; 00-00-00-00-00-00-00-E0",
  "   Physical Address. . . . . . . . . ; 00-00-00-00-00-00-00-E0",
  "   Physical Address. . . . . . . . . ; 00-00-00-00-00-00-00-E0"
]

The first 2 are the Wireless:

Microsoft Virtual Miniport Adapter
the actual 802.11b/g/n Adaptor

The third is the Ethernet port.

The last 2 are virtual tunneling ports.

~

Dan Rathbun

DUh... I just stumbled upon GetMAC.exe on my Win 7 machine. (It is in the "%WINDIW%/System32" directory.)

Ironic given the title of the topic.

Win 7 comes with it installed.

It is installed on XP Pro, but other editions need to install the Resource Kit or Support Tools. (They are separate installers on the install CD.)

Documentation page: http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/getmac.mspx?mfr=true

Output looks like: %(#008080)[C:\Users\Dan>getmac]


Physical Address    Transport Name
=================== ==========================================================
XX-XX-XX-2B-E5-XX   \Device\Tcpip_{<a GUID is output here>}
XX-XX-XX-C2-1B-96   Media disconnected
XX-XX-XX-C2-1B-96   Media disconnected

Garry K

A fellow in Russian has been testing this and ends up with this error when running SU 2014.

Error: #<ArgumentError: invalid byte sequence in UTF-8>
The line of code that is fails on is

lines = file.grep(regex)

So the next thing we did was change the prior line to but had the same error.

File.open(tempfile, 'r', :encoding => 'iso-8859-1') do |file|

What is interesting and confusing is that when we ran this code from the web-console it worked


mac_addr = []
cmd = 'ipconfig /all'
regex = Regexp.compile('(..[;-]){5}..')

if (RUBY_VERSION[0..2] == '1.8')
  lines = %x[#{cmd}].split("\n").grep(regex)
  lines.each { |line| mac_addr << (line.strip[-17, 17]).upcase().gsub(/-/, ';') }
else
  temp_path = File.expand_path(ENV['TMPDIR'] || ENV['TMP'] || ENV['TEMP'])
  tempfile = File.join(temp_path, 'temp.txt')

  `#{cmd} > #{tempfile}`
  File.open(tempfile, 'r', ;encoding => 'iso-8859-1') do |file|
     lines = file.grep(regex)
     lines.each { |line| mac_addr << (line.strip[-17, 17]).upcase().gsub(/-/, ';') }
  end

  File.unlink(tempfile)
end

mac_addr[1]

Dan Rathbun

Encoding::default_internal has not been set correctly in the first release of SU2014.

SO try:
File.open(tempfile, 'r', :encoding => 'iso-8859-1:utf-8') do |file|

Garry K

My mistake this does work.
We got our versions crossed up.

File.open(tempfile, 'r', :encoding => 'iso-8859-1') do |file|

Thanks anyway Dan

Dan Rathbun

OH he is in Russia, so he's likely running a different codepage.

Get his default system Encoding:
Encoding::find("filesystem") >> an encoding
(On my machine it returns the #<Encoding:Windows-1252> object reference.)
or
Encoding::locale_charmap >> returns a name for the encoding.
(On my machine it returns the string "CP1252".)

Garry K

For me it just returns an error.
(eval):5:in `run': uninitialized constant JF::WebConsole::Encoding

Garry K

Sorry - I see this only works in SU 2014

Garry K

I've run into issues with taking the fist or second Mac Address out of ifconfig or ipconfig /all.

I've changed the code to look at the entire file and then to step through it line by line and treat it as a bit of a state machine.

Thanks to pgarmyn and Driven I think I've got some code that will work. They both helped with files as have a handful of other people.

With windows I've tested files in English, French, Russian and some with VMWare set up.
With OSX I've just tested in English.

Mac Address