/*

File: CDROMDriveCheck.c

What's this?

An MPW c tool that checks to see which SCSI IDs are AppleCD SC drives.  It

makes a status call(97) to the AppleCD SC driver (only works with this 

driver).  On exit from the status call, the byte at csParam+1 contains a 

bit field with bits 7 - 0 corresponding to SCSI IDs 7 - 0.  That is, a 

value of 10000010 means there are two AppleCD SCs attached, with SCSI 

IDs 7 and 1.

Code notes:

As the Blue …yster Cult says, I'm making a career of evil:  the refnum is 

hard-coded, which would cause Clarus to commence to bitin' on my kneecaps 

(dogcows aren't very tall) were s/he to find out.

Further references:

Apple CD SCª Developers Guide, Revised Edition, Macintosh CD-ROM device 

driver status calls section.   It's available from APDA.

Mark Baumwell 4/1/92

*/

#include    <types.h>

#include    <stdio.h>

#include    <files.h>

#include    <osutils.h>

#include    <strings.h>

#include    <devices.h>

#include    <sane.h>

main()

{

   CntrlParam

   pb;

   OSErr

   err;

   /*Debugger();*/

   pb.ioCompletion = nil;

   pb.ioVRefNum = 1;

   pb.ioCRefNum = -39; /*Don't hard code refnum!!!*/

   pb.ioNamePtr = nil;

   pb.csCode = 97; // checks bit for a CD ROM

   err = PBStatus ((ParmBlkPtr) &pb, false);

   if (err == noErr)

   {

   char byte2; /*in c, char is an 8 bit value*/

   byte2 = ((char*) pb.csParam)[1];

   printf ("the csParam (in decimal) = %i\n",(short)byte2);

   }

   else

   {

   printf ("error = %i\n",err);

   }

}