Recover

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


int main(int argc, char *argv[])
{
    if (argc != 2)
    {
        printf("Incorrect usage\n");
        return 1;
    }

    FILE *file = fopen(argv[1], "r");

    int buffer[512];
    char filename[8];
    int jpg_counter = 0;
    FILE *img = NULL;

    while (fread(buffer, 512, 1, file) == 1)
    {
        if (buffer[0] == 0xff && buffer[1] == 0xd8 && buffer[2] == 0xff && (buffer[3] & 0xf0) == 0xe0)
        {
            if (jpg_counter == 0) //If this is the first jpg, then start writting the first file 000.jpg
            {
                sprintf(filename, "%03i.jpg", jpg_counter);

                img = fopen(filename, "w");

                fwrite (filename, 512, 1, img);

            }
            else  //If i already found a jpg, then, close the previous file, increment jpg_counter and open a new file
            {
                fclose (img);
                jpg_counter ++;

                sprintf(filename, "%03i.jpg", jpg_counter);

                img = fopen(filename, "w");
                fwrite (filename, 512, 1, img);
            }
        }

        else
        {
            if (jpg_counter != 0 && img != NULL) //If it's not a start of a jpeg, then, If I already found a jpg and the image is open, keep writing
            {
                img = fopen(filename, "w");
                fwrite (filename, 512, 1, img);
                fclose (img);
            }

        }
    }

    fclose (file);

}