v4.0/src/INC/DPB.C

   1 /* dpb.c - retrieve DPB for physical drive */
   2
   3 #include "types.h"
   4 #include "sysvar.h"
   5 #include "dpb.h"
   6 #include "cds.h"
   7
   8 extern char NoMem[], ParmNum[], BadParm[] ;
   9 extern struct sysVarsType SysVars ;
  10
  11
  12 /* Walk the DPB list trying to find the appropriate DPB */
  13
  14 long GetDPB(i)
  15 int i ;
  16 {
  17         struct DPBType DPB ;
  18         struct DPBType *pd = &DPB ;
  19         struct DPBType far *dptr ;
  20         int j ;
  21
  22         *(long *)(&dptr) = DPB.nextDPB = SysVars.pDPB ;
  23         DPB.drive = -1 ;
  24
  25         while (DPB.drive != i) {
  26                 if ((int)DPB.nextDPB == -1)
  27                         return -1L ;
  28
  29                 *(long *)(&dptr) = DPB.nextDPB ;
  30
  31                 for (j=0 ; j < sizeof(DPB) ; j++)
  32                          *((char *)pd+j) = *((char far *)dptr+j) ;
  33
  34         } ;
  35         return (long)dptr ;
  36 }
  37
  38 \1a