Get MAC Address

[Garry K]

Thanks again. I checked the code for windows and it works fine.
I've added an upcase on the following line

lines.each{|line| mac_addr << (line.strip[-17,17]).upcase().gsub( /-/, ':' ) }

[jaimeda]

Hello

This works fine in Sketchup 2013 but not in 2014.

Any tips?

[tt_su]

@jaimeda said:

This works fine in Sketchup 2013 but not in 2014.

Due to the upgrade of the Ruby core this broke. We haven't been able to figure out why. But the workaround is to pipe the result from the command to a temporary file and read it after executing the command.

<span class="syntaxdefault"><br />tempfile&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxstring">"C;/Users/Thomas/Desktop/temp.txt"<br /></span><span class="syntaxkeyword">`</span><span class="syntaxstring">ipconfig&nbsp;/all&nbsp;>&nbsp;#{tempfile}</span><span class="syntaxkeyword">`<br /></span><span class="syntaxdefault">puts&nbsp;File</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">read</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">tempfile</span><span class="syntaxkeyword">)<br />&nbsp;</span><span class="syntaxdefault"></span>

[jaimeda]

Thanks Thomas.

It works perfectly.

[Garry K]

@tt_su said:

@jaimeda said:

This works fine in Sketchup 2013 but not in 2014.

Due to the upgrade of the Ruby core this broke. We haven't been able to figure out why. But the workaround is to pipe the result from the command to a temporary file and read it after executing the command.

<span class="syntaxdefault"><br />tempfile </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> </span><span class="syntaxstring">"C;/Users/Thomas/Desktop/temp.txt"<br /></span><span class="syntaxkeyword">`</span><span class="syntaxstring">ipconfig /all > #{tempfile}</span><span class="syntaxkeyword">`<br /></span><span class="syntaxdefault">puts File</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">read</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">tempfile</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault"> </span>

In my C++ programming for windows I would create a temp file this way

tempfp = tmpfile();

Is there anything in Sketchup that would do the same for both Windows and Mac?

[tt_su]

Well,... since we now have the Ruby Standard Library available: http://ruby-doc.org/stdlib-2.0.0/libdoc/tempfile/rdoc/Tempfile.html

So an updated example would be:

<span class="syntaxdefault"><br /></span><span class="syntaxkeyword">require&nbsp;</span><span class="syntaxstring">'tempfile'<br /></span><span class="syntaxdefault">file&nbsp;</span><span class="syntaxkeyword">=&nbsp;</span><span class="syntaxdefault">Tempfile</span><span class="syntaxkeyword">.new(</span><span class="syntaxstring">'my_prefix'</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">file</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">close<br /></span><span class="syntaxkeyword">`</span><span class="syntaxstring">ipconfig&nbsp;/all&nbsp;>&nbsp;#{file.path}</span><span class="syntaxkeyword">`<br /></span><span class="syntaxdefault">puts&nbsp;File</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">read</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">file</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">path</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">file</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">unlink<br /></span>

[Dan Rathbun]

Weirdly the backquotes, & %x strings which use the ()` method, work on my machine.

And I verified that I do not have the backquote_patch.rb (that I proposed,) loaded.

[Chris Fullmer]

We have seen that if a user drags a skp model onto their SU icon, then they work. but if they double click on a skp model file, or double click on the SU icon, then it does not work. Are you seeing it work in both scenarios?

[Garry K]

@tt_su said:

Well,... since we now have the Ruby Standard Library available: http://ruby-doc.org/stdlib-2.0.0/libdoc/tempfile/rdoc/Tempfile.html

So an updated example would be:

<span class="syntaxdefault"><br />require </span><span class="syntaxstring">'tempfile'<br /></span><span class="syntaxdefault">file </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> Tempfile</span><span class="syntaxkeyword">.new(</span><span class="syntaxstring">'my_prefix'</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">file</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">close<br /></span><span class="syntaxkeyword">`</span><span class="syntaxstring">ipconfig /all > #{file.path}</span><span class="syntaxkeyword">`<br /></span><span class="syntaxdefault">puts File</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">read</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">file</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">path</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault">file</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">unlink<br /></span>

This is great for 2014 and forward - but what if you want to support earlier versions.

I guess we have to either use a one size fits all strategy or check the version an branch appropriately.

[Dan Rathbun]

There are whole topic threads on using the TEMP directory.

No problem on Mac OSX...

The issue on PC is unicode characters in usernames, which cause Ruby 1.8.x to choke.

So some coders create a TEMP subdir of THEIR specific plugin's folder.
(I think this is better than creating any temp folders in the root dir of the system drive.)

[Dan Rathbun]

@chris fullmer said:

... but if they double click on a skp model file, or double click on the SU icon, then it does not work. Are you seeing it work in both scenarios?

NO neither.

I see now, I either have used a pinned shortcut copy (of the desktop icon,) on the taskbar, or a copy on the StartMenu, or from a popup menu of the Desktop taskbar.
These are all single-click ways of launching SketchUp. I usually start SU this way because the Desktop is covered up.

[jaimeda]

I think this works in 2014 and earlier

<span class="syntaxdefault">IO</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">popen</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"ipconfig/all >temp.txt"</span><span class="syntaxkeyword">)</span><span class="syntaxdefault"> </span><span class="syntaxkeyword">{|</span><span class="syntaxdefault">fd</span><span class="syntaxkeyword">|</span><span class="syntaxdefault"> fd</span><span class="syntaxkeyword">.</span><span class="syntaxdefault">readlines</span><span class="syntaxkeyword">}<br /></span><span class="syntaxdefault">lines </span><span class="syntaxkeyword">=</span><span class="syntaxdefault"> open</span><span class="syntaxkeyword">(</span><span class="syntaxstring">"temp.txt"</span><span class="syntaxkeyword">).</span><span class="syntaxdefault">readlines<br />puts</span><span class="syntaxkeyword">(</span><span class="syntaxdefault">lines</span><span class="syntaxkeyword">)<br /></span><span class="syntaxdefault"> </span>

[Garry K]

Does this code work with Mac OS.
With windows the tempfile goes to desktop and gets discarded when finished.
Where does the file go for Mac OS and do we have rights?

      # do this for testing on a mac
      @@windows = false 

      # do this for testing on windows
      # @@windows = false 

      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}..')

      tempfile = "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)

      # if windows and we have more than 1 mac address 
      # then 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]

[Dan Rathbun]

The temp file only goes to the desktop by chance that your current working directory is pointing at the desktop directory.

WIN = RUBY_PLATFORM !~ /darwin/i OSX =( not WIN ) desktop_dir = WIN ? "#{ENV['USERPROFILE']}/Desktop" : "~/Desktop"
Assuming that the name of the directory is not language localized, but it likely IS.

You should not ever assume some other script has not changed the working directory.

All older SketchUp versions attempted to set it to the user's home directory.
SketchUp 2014 (on my machine,) has left me in "#{ENV['SystemRoot']}/System32" (why I do not know, but have asked.)

To see what the current working directory is, use:
Dir::getwd
or, it's alias:
Dir::pwd

To temporarily change the working directory (and have it change back to whatever it was,) use the blockform of the Dir::chdir class method.

Dir;;chdir( RUBY_PLATFORM !~ /darwin/i ? "#{ENV['USERPROFILE']}/Desktop" ; "~/Desktop" ) {
      # do this for testing on a mac
      @@windows = false 

      # do this for testing on windows
      # @@windows = false 

      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}..')

      tempfile = "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)

      # if windows and we have more than 1 mac address 
      # then 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]

} # chdir block

To test for access rights:
File::directory?( dirname ) && File::writable?( dirname )

See the File class for other class query methods to determine access info: executable?(), executable_real?(), readable?(), readable_real?(), writable_real?, etc.

Be aware that path strings with unicode characters will not work well under Ruby 1.8.x on PC. (Mac OSX does not have these problems.)

[Garry K]

Thanks Dan. I should have thought about the whole issue of current working directory. This has been true since the beginning of DOS.

I'm going to put a config folder in my own plugin folder. I can put the temp.txt file there. I can also use the folder to put user custom settings so that updates don't overwrite user settings.

Thanks

[tt_su]

@garry k said:

I'm going to put a config folder in my own plugin folder. I can put the temp.txt file there. I can also use the folder to put user custom settings so that updates don't overwrite user settings.

For SketchUp versions older than SU2014 that might cause problems if the user doesn't have full permissions to the Plugins folder since Windows locks down Program Files quite tight. Ruby will in many cases not have write access.

[Garry K]

@tt_su said:

For SketchUp versions older than SU2014 that might cause problems if the user doesn't have full permissions to the Plugins folder since Windows locks down Program Files quite tight. Ruby will in many cases not have write access.

OK - then what do you suggest. I will need to find a location to temporarily write a file. This will be for Windows and Mac.

I suppose I could use one strategy for SU 2014 and another for older versions.

[tt_su]

For temporary files in SketchUp < 2014 I would write to the temp folder based on that the ENV variable gives you:

temp_path = File.expand_path(ENV['TMPDIR'] || ENV['TMP'] || ENV['TEMP'])

For settings and persistent preferences, if you want to write that to file it will get tricky in older SketchUp. I stick with using Sketchup.write_default/read_default.

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

[Dan Rathbun]

@tt_su said:

For temporary files in SketchUp < 2014 I would write to the temp folder based on that the ENV variable gives you:

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

We would need to employ tricks like in TIG's PCFIleTools.
http://sketchucation.com/forums/viewtopic.php?f=180%26amp;t=43007%26amp;p=385472

[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.