One last problem with my config

[tcarman]

I have nearly perfected my server build but am having issues with one last thing.

I have created a script to create a D: partition and want WPI to disable the checkbox if D: is not present.

At the moment I have the following, which for some reason does not disable the checkbox if D: is a CD-ROM. The CDROM Dependancy currently maps the CD-Rom to X:

prog[pn]=['Create D: Partition'];
ordr[pn]=[2];
uid[pn]=['CREATEDPARTITION'];
dflt[pn]=['yes'];
cat[pn]=['System'];
forc[pn]=['no'];
deps[pn]=['CDROM'];
gcond[pn]=['DriveExists("D:") && FileExists("D:\\pagefile.sys")'];
cmd1[pn]=['hidecmd /w cscript c:\\build\\scripts\\partition.vbs //B'];
pn++;

Ideally I would like a DriveType() function to determine what type of drive D: is, like this

prog[pn]=['Create D: Partition'];
ordr[pn]=[2];
uid[pn]=['CREATEDPARTITION'];
dflt[pn]=['yes'];
cat[pn]=['System'];
forc[pn]=['no'];
deps[pn]=['CDROM'];
gcond[pn]=['DriveExists("D:") && DriveType("Fixed")'];
cmd1[pn]=['hidecmd /w cscript c:\\build\\scripts\\partition.vbs //B'];
pn++;

Am I missing something, why is my config not disabling the option when D: is a CD-ROM?

Cheers.

Edited September 21, 2006 by tcarman

[zorphnog]

This wasn't too hard to implement so I went ahead and created two functions: DriveExists(drive) and DriveType(drive).

Pass a drive letter (no colon[:]) to DriveExists() and it will return true or false.

Pass a drive letter (no colon[:]) to DriveType() and it will return one of six values:

UNKNOWN - The drive exists, but the type is unknown.

REMOVEABLE - The drive exists and is removeable (i.e. USB attached drive)

FIXED - The drive exists and is a fixed hard drive partition.

NETWORK - The drive exists and is mapped to a network share.

CDROM - The drive exists and is an optical drive.

RAMDISK - The drive exists and is a memory allocated drive.

NULL - The drive does not exist.

Note: All returned values from DriveType() are in uppercase.

Here are the two functions. Either add them to core.js or download the modified core.js.

function DriveExists(dr)
{
	position="core.js";
	whatfunc="DriveExists()";
	var en, ite;

	en = new Enumerator(fso.Drives);
	for(; !en.atEnd(); en.moveNext())
	{
		ite = en.item();
		if (ite.DriveLetter == dr.toUpperCase())
			  return true;
	}

	return false;
}

function DriveType(dr)
{
	position="core.js";
	whatfunc="DriveType()";
	var driv;

	if(DriveExists(dr))
	{
		driv = fso.GetDrive(dr);
		switch(driv.DriveType)
		{
			case 0: return 'UNKNOWN';
			case 1: return 'REMOVEABLE';
			case 2: return 'FIXED';
			case 3: return 'NETWORK';
			case 4: return 'CDROM';
			case 5: return 'RAMDISK';
		}
	}

	return NULL;
}

@tcarman your gcond would be the following:

gcond[pn]=['DriveType("D")=="FIXED"'];

This will check if the drive exists and if it is a fixed partition.

Modified core.js file:

Edited September 22, 2006 by mritter

[tcarman]

Excellent. Thanks very much zorphnog. I will test it out.

Cheers.

[tcarman]

This works great. Thanks.

I want to learn to write my own functions based on WMI queries. I am a total noob in JScript but can understand VBScript.

Someone had mentioned WPI has some WMI built in ??

How do I go about writing my own functions in Jscript for WPI?

Thanks for the help.

Edited September 22, 2006 by tcarman

[zorphnog]

If you know VBScript then you should be good. JScript and VBScript are interchangeable except for some syntax differences. I'm not a JScript expert by far. I just kind of learn things as I need them.

I guess the best thing to do is go through all of the WPI code to get a feel for how to do things. It takes a while to do, but thats how I learned.

[tcarman]

function DriveExists(dr)
{
	position="core.js";
	whatfunc="DriveExists()";
	var en, ite;

	en = new Enumerator(fso.Drives);		  // This is the line that I need further clarification on ?!?
	for(; !en.atEnd(); en.moveNext())
	{
		ite = en.item();
		if (ite.DriveLetter == dr.toUpperCase())
			  return true;
	}

	return false;
}

[mritter]

Nice code, Zorphnog. But I have already written code for those functions. Use the above code if you want, but it won't be the same for 5.5.

[zorphnog]

@tcarman: I don't know how much you know about programming or what languages you know, but an enumerator is a common operator across all languages. It basically allows you to step through a list of results one item at a time. In this case fso.Drives (fso is a FileSystemObject that is declared globally in WPI) is a list of all drives on the system. The for loop steps through each drive using the moveNext() function. When en.item() is called it returns a Drive object and we can then compare the drive letter to the one that was passed to the function.

@mritter: I figured you would already be working on these, but he needed a solution and it only took me a couple of minutes to put together.