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Program to read the Partition Table Information of Drive C using biosdisk( ) function

Posted By: Easy Tutor     Category: C Programming     Views: 7780

Write a program to read the Partition Table Information of Drive C using biosdisk( ) function.

Code for Program to read the Partition Table Information of Drive C using biosdisk( ) function in C Programming

 # include <stdlib.h>
 # include  <stdio.h>
 # include  <conio.h>
 # include   <bios.h>

 struct Partition
 {
    unsigned char ucBootable;
    unsigned char ucStartHead;
    unsigned int  uiStartCylinderSector;
    unsigned char ucTypeOfPartition;
    unsigned char ucEndHead;
    unsigned int  uiEndCylinderSector;
    unsigned long ulStartSector;
    unsigned long ulPartitionLength;
 };


 int main( )
 {
    unsigned char sBuffer[512]={NULL};

    clrscr( );
    textmode(BW80);

    biosdisk(2,0x80,0,0,1,1,sBuffer);

    if((_AH&0xFF)!=0x00)
    {
       switch(_AH)
       {
      case 0x01 : printf("Bad command");
              break;

      case 0x02 : printf("Address mark not found");
              break;

      case 0x03 : printf("Attempt to write to write-protected disk");
              break;

      case 0x04 : printf("Sector not found");
              break;

      case 0x05 : printf("Reset failed (hard disk)");
              break;

      case 0x06 : printf("Disk changed since last operation");
              break;

      case 0x07 : printf("Drive parameter activity failed");
              break;

      case 0x08 : printf("Direct memory access (DMA) overrun");
              break;

      case 0x09 : printf("Attempt to perform DMA across 64K boundary");
              break;

      case 0x0A : printf("Bad sector detected");
              break;

      case 0x0B : printf("Bad track detected");
              break;

      case 0x0C : printf("Unsupported track");
              break;

      case 0x10 : printf("Bad CRC/ECC on disk read");
              break;

      case 0x11 : printf("CRC/ECC corrected data error");
              break;

      case 0x20 : printf("Controller has failed");
              break;

      case 0x40 : printf("Seek operation failed");
              break;

      case 0x80 : printf("Attachment failed to respond");
              break;

      case 0xAA : printf("Drive not ready (hard disk only)");
              break;

      case 0xBB : printf("Undefined error occurred (hard disk only)");
              break;

      case 0xCC : printf("Write fault occurred");
              break;

      case 0xE0 : printf("Status error");
              break;

      case 0xFF : printf("Sense operation failed");
              break;

      default   : printf("Unknown Error");
       }
    }

    else
    {
       struct Partition *ptrDriveC=(struct Partition*)&sBuffer[0x1BE];

       int iStartingCylinderHighByte=(ptrDriveC->uiStartCylinderSector>>8);
       int iStartingCylinderLowByte=((ptrDriveC->uiStartCylinderSector&0x00C0)<<2);
       int iStartingCylinder=(iStartingCylinderLowByte+iStartingCylinderHighByte);

       int iEndingCylinderHighByte=(ptrDriveC->uiEndCylinderSector>>8);
       int iEndingCylinderLowByte=((ptrDriveC->uiEndCylinderSector&0x00C0)<<2);
       int iEndingCylinder=(iEndingCylinderLowByte+iEndingCylinderHighByte);

       printf("* * * * * * * * * *  Partition Information  * * * * * * * * * *\n\n");
       printf("Drive C: ");

       if(ptrDriveC->ucBootable==0x80)
      printf("Bootable\n");

       else
      printf("Not Bootable\n");

       printf("Start Head = %d\n",ptrDriveC->ucStartHead);
       printf("Starting Sector Number = %d\n",(ptrDriveC->uiStartCylinderSector&0x003F));
       printf("Starting Cylinder Number = %d\n",iStartingCylinder);

       printf("Partition Type = ");

       switch(ptrDriveC->ucTypeOfPartition)
       {
      case 0x00 : printf("Unused\n");
              break;

      case 0x01 : printf("12-Bit\n");
              break;

      case 0x02 : printf("Xenix\n");
              break;

      case 0x04 : printf("16-Bit\n");
              break;

      case 0x05 : printf("Extends\n");
              break;

      case 0x06 : printf("Huge\n");
              break;

      case 0x64 : printf("Novell\n");
              break;

      case 0x75 : printf("PCIX\n");
              break;

      case 0xDB : printf("CP/M\n");
              break;

      case 0xFF : printf("BBT\n");
              break;

      default   : printf("UnKnown\n");
              break;
       }

       printf("End Head = %d\n",ptrDriveC->ucEndHead);
       printf("Ending Sector Number = %d\n",(ptrDriveC->uiEndCylinderSector&0x003F));
       printf("Ending Cylinder Number = %d\n",iEndingCylinder);
       printf("Start Sector relative to Disk Begining = %ld\n",ptrDriveC->ulStartSector);
       printf("Partition Length = %ld\n",ptrDriveC->ulPartitionLength);

       printf("\n* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *");
    }

    getch( );
    return 0;
 }
  
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Easy Tutor
Easy Tutor author of Program to read the Partition Table Information of Drive C using biosdisk( ) function is from United States. Easy Tutor says

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