computer name

[#1]

Hi jmpers,

I need to build an application in jmp for different users, meaning that different users will have different User Interface.. (it is the same application) I was wondering if is there a way to get user profile? Let say computer name, user name or server name from jmp ? Doing so I can decide which script to open

Tanks

pniel

[#2]

Can someone help me with the syntax for calling a DLL?  I want to get the user's username using the Windows API GetUserName function.  I don't want to look up the username environment variable because that can be spoofed.

Advapi32.dll

BOOL WINAPI GetUserName(

  _Out_    LPTSTR lpBuffer,

  _Inout_  LPDWORD lpnSize

);

Thanks!

[#3 · Accepted solution]

Here is some JSL that I wrote for getting the username from the system. This worked in JMP 10, running on Windows 7.

dll = Load DLL( "mpr.dll" );

dll << DeclareFunction(

     "WNetGetUserA",

      Convention( STDCALL ),

      Alias ( "GetUserName" ),

      Arg( UInt8, "format", input ),

      Arg( AnsiString, "username", output ),

      Arg( UInt64, "length", update ),

      Returns( UInt32 )

);

username = "                                                  ";

unlen = length(username);

result = dll << GetUserName(0, username, unlen);

show(username);

dll << UnloadDLL();

First, you need to load the system DLL. I didn't have any luck with Advapi32.dll. But I found what I needed with mpr.dll. Notice I didn't need to specify a path to the DLL since it was on my system path.

dll = Load DLL("mpr.dll");

Next, you need to declare any method that you are going to call in the DLL. The method I want to use is actually called WNetGetUserA(), but by defining an alias, I can simply call it using GetUserName().

dll << DeclareFunction(

      "WNetGetUserA",

      Convention( STDCALL ),

      Alias ( "GetUserName" ),

      Arg( UInt8, "format", input ),

      Arg( AnsiString, "username", output ),

      Arg( UInt64, "length", update ),

      Returns( UInt32 )

);

Now I want to define the variables that I am going to pass in as arguments. I create a username and initialize it to blanks. Then I use the length() function in JMP to get the current length of the buffer I just created.

username = "                                                  " ;

unlen = length(username);

Now I can call the function. Notice the first argument is input only, so I just use a constant instead of defining a variable. Then the show() command shows my username after making the call.

result = dll << GetUserName(0, username, unlen);

show(username);

Finally, I am done so I clean up.

dll << UnloadDLL();

I hope this works for you. If you come up with a better way, please let us know.

By the way, using loadDLL only works on Windows. It isn't supported on the Mac. For that reason I do a check at the top of my script.

Names Default To Here( 1 );

If( Host is( Mac ),

     Print( "Sorry, this script is not supported on Mac." );

     Stop();

);

Enjoy,

JohnP

[#4]

JohnP,

Thanks so much!  That's exactly what I'm looking for.  Can't mark this as the correct answer because I didn't start this thread.

[#5]

The original post also asked about the computer name. To get the computer name, use Kernel32.dll and the method name, GetComputerNameA(). So it will look like this:

dll = Load DLL( "Kernel32.dll" );

dll << DeclareFunction(

     "GetComputerNameA",

      Convention( STDCALL ),

      Alias ( "GetComputerName" ),

      Arg( AnsiString, "computername", output ),

      Arg( UInt64, "length", update ),

      Returns( UInt32 )

);

name = "                                                  ";

unlen = length(name);

result = dll << GetComputerName(name, unlen);

show(name);

dll << UnloadDLL();

JohnP

[#6]

JMP 10 supports this query directly

Get Enviromental Variable("Computername")

Best,

-Matt

[#7]

I need something that can't be hacked by something as simple as setting the environment variable.  Thanks JohnP for both solutions!

[#8]

thanks, syntax in JMP12 is actually:

Get Environment Variable("Computername");

[#9]

For Mac OS

Try this:

If( Host is( "Mac" ),username=Get Environment Variable( "USER" );
	stamp="Test "||username||", "||char(today());
);