print_id3

struct id3tag {
    char *title[31];
    char *interpret[31];
    char *album[31];
    char *year[5];
    char *comment[31];
    int *genre[1];
} tag;

int print_id3(char *filename) {
    FILE *file;
    char tag_mark[3] = {"TAG"};
    int bool, i;

    file = fopen(filename, "r");

    if (file == NULL) {
        return 1;
    }
    // Dateizeiger auf die Position 128 bytes vor Dateiende setzen
    int status_fseek = fseek(file, -128, SEEK_END);
    if (status_fseek != 0) {
        (void) fclose(file);
        return 3;
    }
    // die ersten 3 Byte auslesen
    char tag_read[3];
    (void) fread((void *) &tag_read, 1, 3, file);

    if (ferror(file) != 0) {
        (void) fclose(file);
        return 3;
    }
    // wenn die ersten drei Byte TAG heißen, dann ist ein id3tag geschrieben
    for (i = 0; i < 3; i++) {
        bool = (tag_mark[i] == tag_read[i]) ? 1 : 0;
    }

    if (bool == 1) {
        (void) fread((void *) &tag.title, 1, sizeof(((struct id3tag *) 0)->title) / 8 - 1, file);
        tag.title[30] = "\0";

        (void) fread((void *) &tag.interpret, 1, sizeof(((struct id3tag *) 0)->interpret) / 8 - 1, file);
        tag.interpret[30] = "\0";

        (void) fread((void *) &tag.album, 1, sizeof(((struct id3tag *) 0)->album) / 8 - 1, file);
        tag.album[30] = "\0";

        (void) fread((void *) &tag.comment, 1, sizeof(((struct id3tag *) 0)->comment) / 8 - 1, file);
        tag.comment[30] = "\0";

        (void) fread((void *) &tag.year, 1, sizeof(((struct id3tag *) 0)->year) / 8 - 1, file);
        tag.year[4] = "\0";

        (void) fread((void *) &tag.genre, 1, sizeof(((struct id3tag *) 0)->genre) / 8 - 1, file);

        (void) fclose(file);
        return 0;
    } else {
        (void) fclose(file);
        return 2;
    }