Program to Restore the MBR from Backup:
The Coding of the program is as follows:
/* Program to Restore the Backup of MBR From the
Backup File */
#include <bios.h>
#include <stdio.h>
int main(void)
{
struct diskinfo_t dinfo;
int result;
int count=0;
char filename[80]; /* Stores the File name given
by User */
static char dbuf[512]; /* Data Buffer of 512 Bytes
*/
FILE *fp;
/* Get the user Input for MBR Backup file Path */
printf("\n Enter The Filename and path of Backup File of
MBR \n ");
gets(filename);
if((fp=fopen(filename,"rb"))==NULL)
{
printf("Could not open Backup File, Press any key
to Exit...");
getch();
exit(1);
}
/* MBR data should be of Exact 512 Bytes */
while(count<512)
{
fscanf(fp,"%c",&dbuf[count]);
count++;
}
fclose(fp);
printf("Attempting to Write to Hard disk drive :\n");
dinfo.drive = 0x80; /* drive number for First
Hard Disk */
dinfo.head = 0; /* disk head number */
dinfo.track = 0; /* track number */
dinfo.sector = 1; /* sector number */
dinfo.nsectors = 1; /* sector count */
dinfo.buffer = dbuf; /* data buffer */
result = _bios_disk(_DISK_WRITE, &dinfo);
if ((result & 0xff00) == 0)
{
printf("Restoring the Backup of MBR to The Disk
Sector: successful.\n");
}
else
printf("Cannot Write on Hard Disk drive, status =
0x%02x\n", result);
return 0;
}
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