File Wipe out data Area Sectors Write information root Directory

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///// Calculate The Size of File in Sectors \\\\\

num_sectors = one.entry[i].file_size/512;

if((one.entry[i].file_size%512)>0)
{
num_sectors = num_sectors+1;
}

/* Data buffer of 512 bytes with 512 NULL characters */

for(j=0;j<512;j++)
{
wipe_buf[j] = '\0';
}

///// Starting Sector of the File \\\\\

j= one.entry[i].starting_cluster+31;

/* Wipe out the data Area Until the Sectors of file End */

while(j!=(one.entry[i].starting_cluster +
num_sectors+31) )
{
if((abswrite(0x00, 1, j, &wipe_buf))!=0)

{
printf("\n Error Writing on Disk Sectors");
getch();
exit(0);
}
j++;
}

printf("\n\n File \"%.8s.%.3s\" Deleted !!!" ,
one.entry[i].filename,
one.entry[i].extension);

one.entry[i].attribute = 0; /* Set the File Attribute
to 0 */
one.entry[i].time = 0; /* Wipe The Time information
of File */
one.entry[i].date = 0; /* Wipe The Date information
of File */
one.entry[i].starting_cluster = 0; /* Set the Starting cluster to 0
*/
one.entry[i].file_size = 0; /* Set the file Size to 0 */

one.entry[i].filename[0]=0xE5; /* Give the Deleted
file Status to the File */

///// Write above information in the root Directory \\\\\\

result= abswrite(0x00, 1, 19, &one);

if (result != 0)
{
perror("Error in Reading Sector, Press any key to
Exit...");
getch();
exit(1);
}

}

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Data Recovery Book
 
Chapter 1 An Overview of Data Recovery
Chapter 2 Introduction of Hard Disks
Chapter 3 Logical Approach to Disks and OS
Chapter 4 Number Systems
Chapter 5 Introduction of C Programming
Chapter 6 Introduction to Computer Basics
Chapter 7 Necessary DOS Commands
Chapter 8 Disk-BIOS Functions and Interrupts Handling With C
Chapter 9 Handling Large Hard Disks
Chapter 10 Data Recovery From Corrupted Floppy
Chapter 11 Making Backups
Chapter 12 Reading and Modifying MBR with Programming
Chapter 13 Reading and Modifying DBR with Programming
Chapter 14 Programming for “Raw File” Recovery
Chapter 15 Programming for Data Wipers
Chapter 16 Developing more Utilities for Disks
Appendix Glossary of Data Recovery Terms
 
 
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