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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#define TOO_SMALL_ERROR 1
int main()
{
char* filename;
int file_name_size;
FILE* fp;
int file_size;
int i;
int pos;
int amount;
char* fileContents;
srand(time(NULL));
filename = malloc(1024);
printf("File to destroy (it will be overwritten): ");
fgets(filename, 1024, stdin);
filename = strtok(filename, "\n");
file_name_size = strlen(filename);
fp = fopen(filename, "rb");
fseek(fp, 0L, SEEK_END);
file_size = ftell(fp);
fseek(fp, 0L, SEEK_SET);
if (file_size < 2100)
{
fprintf(stderr, "Error: File too small: %s.", filename);
return TOO_SMALL_ERROR;
}
fileContents = malloc(file_size);
fread(fileContents, 1, file_size, fp);
fclose(fp);
pos = file_size/4 + (int)(file_size/4 * ((double)rand()/RAND_MAX));
printf("Destruction amount (~50 is recommended): ");
scanf("%d", &amount);
for (i = pos; i < pos+amount; i++)
{
fileContents[i] = '0';
}
fp = fopen(filename, "wb");
fwrite(fileContents, 1, file_size, fp);
fclose(fp);
printf("Done! Your image might be corrupt.\n");
return 0;
}
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