Recover.c

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



int main(int argc, char *argv[])
{
   // check usage
    if (argc != 2)
    {
        printf("Usage: ./recover image\n");
        return 1;
    }
    char *card = argv[1];
    // open file
     FILE *file = fopen(card, "r");

    // if file isnt a file tell the user and inform them of such return 1
    if (!file)
    {
        printf("couldn't open that file dawg, like give me a valid chunk of memory to use my dude\n");
        return 1;
    }
    fseek(file, 0, SEEK_END);
    long count = ftell(file);
    fseek(file, 0, SEEK_SET);

    int *bytes = malloc(512 * sizeof(int));
    fread(bytes, 1, 512, file);
    int jpg = 0;
    int i  = 0;
    while (i < count)
    {
        if (bytes[0] == 0xff && bytes[1] == 0xd8 && bytes[2] == 0xff && bytes[3] >= 0xe0 && bytes[3] <= 0xef)
        {
            char *name = malloc(sizeof(8));
            jpg++;
            sprintf(name, "%03i.jpg", jpg);
            FILE *jpeg = fopen(name, "w");
            fwrite(bytes, 512, 1, jpeg);
            fseek(file, 0, SEEK_SET);
            fseek(file, 512, SEEK_CUR);
            fclose(jpeg);
            free(name);
        }
        else
        {
            fseek(file, 512, SEEK_CUR);
        }
        i++;
    }
    free(bytes);
    fclose(file);
    free(card);
}