// gcc -o ./pwn -fno-stack-protector -no-pie  ./ez_overflow.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#define BUFSIZE 32
#define FLAGSIZE 64
void init() {
    setvbuf(stdin, 0LL, 2, 0LL);
    setvbuf(stdout, 0LL, 2, 0LL);
    setvbuf(stderr, 0LL, 2, 0LL);
}


void win() {
  char buf[FLAGSIZE];
  int fd = open("flag", O_RDONLY);
  read(fd, buf, sizeof(buf));
  puts(buf);
  close(fd);
}


void vuln(){
  char buf[BUFSIZE];
  gets(buf);
}


int main(int argc, char **argv){
  init();
  printf("How to jump to 0x%x\n", win);
  puts("Please enter your string: ");
  vuln();
  return 0;
}