[Win32utils-devel] Am I on Windows XP?

Berger, Daniel Daniel.Berger at qwest.com
Wed Sep 24 18:52:34 EDT 2008


 

> -----Original Message-----
> From: win32utils-devel-bounces at rubyforge.org 
> [mailto:win32utils-devel-bounces at rubyforge.org] On Behalf Of 
> Berger, Daniel
> Sent: Wednesday, September 24, 2008 1:44 PM
> To: Development and ideas for win32utils projects
> Subject: [Win32utils-devel] Am I on Windows XP?
> 
> Hi all,
> 
> I was looking over a code snippet to determine if I was on 
> Windows XP or not. Normally this would be easy - just check 
> for major version 5, minor version 1.
> 
> There's one snag, though. According to the MSDN docs, a 64 
> bit Windows XP Pro will return a minor version of 2. So, how 
> do we distinguish between Windows Server 2003 and a 64 bit Windows XP?
> 
> This is what I came up with. It feels pretty hackish, as I'm 
> just checking the suitemask to see if any 2003 features are 
> installed, but maybe it works. Is there a more elegant solution?
> 
>       def windows_xp?
>          bool = false
> 
>          buf = 0.chr * 156
>          buf[0,4] = [buf.size].pack("L") # Set the size
> 
>          GetVersionEx(buf)
> 
>          major = buf[4,4].unpack("L")[0]
>          minor = buf[8,4].unpack("L")[0]
>          suite = buf[152,2].unpack("S")[0]
> 
>          # Make sure we detect a 64-bit Windows XP Pro
>          if major == 5
>             if minor == 1
>                bool = true
>             elsif minor == 2
>                if suite && VER_SUITE_BLADE == 0          &&
>                   suite && VER_SUITE_COMPUTE_SERVER == 0 &&
>                   suite && VER_SUITE_DATACENTER == 0     &&
>                   suite && VER_SUITE_ENTERPRISE == 0     &&
>                   suite && VER_SUITE_STORAGE_SERVER == 0
>                then
>                   bool = true
>                end
>             else
>                # Do nothing - already false
>             end 
>          end
> 
>          bool
>       end

Whoops, should be single '&' there, e.g. "suite & VER_SUITE_BLADE". I
could probably use some parens, too. But you get the idea. :)

Dan


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