Get MAC Address

Garry K

I'm reading that back ticks ` won't work in OSX and that using back ticks in windows is not as secure as the following

puts %x[ipconfig /all]

slbaumgartner

I'm reading that back ticks ` won't work in OSX

Where are you reading that? They work fine for me (of course, SU may "beachball" while Ruby blocks waiting for output from a slow command).

Steve

Garry K

This link makes references to it

http://stackoverflow.com/questions/690151/getting-output-of-system-calls-in-ruby

driven

@garry k said:

I'm reading that back ticks ` won't work in OSX

where are you reading that? they are interchangeable on a mac. Both return in Ruby Console.

> puts `ifconfig -a | grep "ether"`
	ether 00;** ;** ;** ;** ;36 
	ether 00;** ;** ;** ;** ;ad 
nil
> puts %x(ifconfig -a | grep "ether")
	ether 00;** ;** ;** ;** ;36 
	ether 00;** ;** ;** ;** ;ad 
nil

but ifconfig will give you more that one ether, so...

 puts (%x(ifconfig -a | grep "ether")).split[1]
"00;** ;** ;** ;** ;36"
nil

or mac only [I think]


> > puts (%x(netstat -in | grep "en0")).split[3].inspect
"00;** ;** ;** ;** ;36"
nil

you'll get what you want...

john

slbaumgartner

@garry k said:

This link makes references to it

http://stackoverflow.com/questions/690151/getting-output-of-system-calls-in-ruby

That link discusses the various ways to capture the output of a system command and security issues that arise from issuing a system command from Ruby. Nowhere does it say that the backtick syntax does not work on Mac OS X!

Dan Rathbun

Garry.. this is safer and faster to use boolean Constants throughout your module(s) [ie, Strings are slow.]

At the top of your module:
MAC = OSX = RUBY_PLATFORM !~ /mswin|mingw/ PC = WIN = (not MAC)

Then say down further:

if WIN
  # do this
else
  # it's a Mac, do that
end

another example, showing a webdialog:
WIN ? @dlg.show() : @dlg.show_modal()

~

Dan Rathbun

@garry k said:

then for windows I can redirect the output of ipconfig

null = test(?e, '/dev/null') ? '/dev/null' : 'NUL'

Why? The %x or backquoted string method returns it's result.

so:
ip = %x[ipconfig /all]
Then parse the string ip,.. iterate it using each_line or
split("\n") it into an array of lines, then use find, etc.

driven

@dan

does reply_from_ifconig.split("\n").grep("Physical Address") or similar work on a PC?

john
EDIT for something as un-changing as ifconfig on a mac you could use

(%x(ifconfig -a)).split("\n")[10].split[1]

pgarmyn

@dan rathbun said:

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

Scanning for “Physical Address” only gives a result with an EN/US OS
This works also on the old continent :

def MyModule.mac_address
	platform = RUBY_PLATFORM.downcase
	iptxt = `#{(platform =~ /win32/) ? 'ipconfig /all' ; 'ifconfig'}`
	## delete DHCPv6 ;
	iptxt.gsub!(/..\-..\-..\-..\-..\-..\-..\-..\-..\-..\-..\-..\-..\-../,"") 
	# delete Tunnel ;
	iptxt.gsub!("00-00-00-00-","")
	## create array with all the physical adresses ;
	t_array=iptxt.scan(/..\-..\-..\-..\-..\-../)
	#puts t_array.inspect 
	## returns first physical adresses if one found
	return t_array[0] if t_array.length>0 
	return nil
end

driven

There's also this one

mac_MAC = %x(ioreg -rd1 -c IOPlatformExpertDevice |  awk "/IOPlatformUUID/ { print $3; }")

returns
"IOPlatformUUID" = "00000000-0000-1000-8000-00**********" [my address obscured with ***]

john

pgarmyn

@dan rathbun said:

DUh... I just stumbled upon GetMAC.exe on my Win 7 machine....

Yes, i have it also on Win8.1
For the MAC-world (Apple-users) is there an equivalent

driven

@pgarmyn said:

For the MAC-world (Apple-users) is there an equivalent :?:

I just posted it above?

The command ioreg located in /usr/sbin/ioreg is used to display the I/O Kit registry.

pgarmyn

@driven

driven

@pgarmyn said:

:thumb: :thumb: :thumb: @driven

Well, maybe not three thumbs... it's unclear to me if that's a standard or an xtool instal, so a safer bet would be

getMACADDRESS = %x(/usr/sbin/networksetup -getMACADDRESS en0 | /usr/bin/awk '{print $3}' | /usr/bin/sed s/;//g)

which returns

001ec*******

the mac MAC address using standard instal items...

john

Dan Rathbun

There IS a gem that can be used for reference (perhaps it can be made SketchUp friendly.)

https://github.com/ahoward/macaddr/blob/master/lib/macaddr.rb

Garry K

I'm back at this MAC address - specifically for first Ethernet device.

This code seems to work fine for Windows 7 - but will it work for OSX ??

Has anyone tried this in a French computer or some other language?

` def get_mac_address()
return @mac_address if defined?( @mac_address )

@win = ( RUBY_PLATFORM =~ /darwin/i ) == nil

tmp = ""
str = ""
first = true

if ( @win )
# for windows put results in array - splitting on newline
ipa = %x[ipconfig /all].split("\n")

# check begining of string for 'Ethernet' and set flag once found
# then check for 'Physical Address' and look at everything after the ':'
# set mac_address and return
ipa.each {|line|
  tmp = line.strip
  str = tmp[0..7]

  if ( first )
    first = false if ( "Ethernet" == str )
  elsif ( "Physical" == str )
    pos = tmp.rindex( ":" )
    @mac_address = tmp[pos+2, tmp.length ]
    return @mac_address
  end
}

else
tmp = %x[ifconfig eth0].strip
pos = tmp.rindex( " " )
@mac_address = tmp[pos+1, tmp.length ]
return @mac_address
end

return ""
end`

pgarmyn

@Garry
As i said before, this only works for US or EN OS.
The output of ipconfig depends on the OS language.
In French you will have to scan for "adresse physique" and for the other languages....

Garry K

This works in Windows 7

def get_mac_address()
	return @@mac_address if defined?( @@mac_address )

	if ( ( RUBY_PLATFORM =~ /darwin/i ) == nil )
		cmd = 'ipconfig /all'
	else
		cmd = 'ifconfig'
	end

	macs = []
	lines = %x[#{cmd}].split("\n").grep( /^.*\s([0-9a-f|A-F]{2}[:-]){5}([0-9a-f|A-F]{2})$/ )
	lines.each{|line| macs << line.strip[-17,17] }

	@@mac_address = macs.first.gsub( '-', ':' )
	return @@mac_address
end

Garry K

Thanks pgarmyn - I was just confirming the language thing
I did try running the code that you posted earlier - but it gave me an error so I decided this was a good opportunity to learn more.

I have cleaned this up so if it is benefit to others

` def get_mac_address()
return @@mac_address if defined?( @@mac_address )

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

# choose lines that have only six pairs of 2 char hex values separated by either a : or -
# pattern must start with a space and be at the end of the line
# there can be white space at the end of the line
lines = %x[#{cmd}].split("\n").grep( /\s([0-9A-F]{2}[-:]){5}([0-9A-F]{2})\s*$/ )
lines.each{|line| mac_addr << (line.strip[-17,17]).gsub( /-/, ':' ) }

# if windows and we have more than 1 mac address use the second one otherwise use the first
# if not windows then use the first address
index = @@windows && mac_addr.length > 1 ? 1 : 0
@@mac_address = mac_addr[index]

return @@mac_address

end`

driven

@gary
couple of changes needed to run on my mac,
got rid of class variables
added windows =
added simplified regex = with .. for grep

def get_mac_address()
windows  = ( ( RUBY_PLATFORM =~ /darwin/i ) == nil )
return mac_address if defined?( mac_address )

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

# choose lines that have only six pairs of 2 char hex values separated by either a ; or -
# pattern must start with a space and be at the end of the line
# there can be white space at the end of the line
regex = Regexp.compile("(..[;-]){5}..")
lines = %x[#{cmd}].split("\n").grep( regex )
lines.each{|line| mac_addr << (line.strip[-17,17]).gsub( /-/, ';' ) }

# if windows and we have more than 1 mac address use the second one otherwise use the first
# if not windows then use the first address
index = windows && mac_addr.length > 1 ? 1 ; 0
mac_address = mac_addr[index]

return mac_address
end

> get_mac_address 00:1e:c4:16:08:46