#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>

struct test{
   char b1;
   char b2;
   char b3;
};
int main(void){
    char buf[9];
    int fd_r;
    //struct test *s_test = malloc(sizeof(struct test));
    struct test *s_test = NULL;
    memset(buf, 0, 9);

    if ((fd_r = open("test.txt", O_RDONLY)) == -1){
        exit(-1);
    }    
  
    read(fd_r, buf, 9);

    for (int i = 0; i < 9; i++){
        printf("%c", buf[i]);
    }
    printf("\n");
    s_test = (struct test*)buf + 2;

    printf("%c %c %c\n", s_test->b1, s_test->b2, s_test->b3);
   
    close(fd_r);
    //free(s_test);
}