{

char filename[100] = "my_test.txt";

// print pid

int pid = getpid();

std::cout << "current pid: " << pid << std::endl;

system("echo \"hello\" > my_test.txt");

system("echo \"world\" >> hijacked");

while (true) {

std::cout << "Opening my_test.txt" << std::endl;

int fd = open(filename, O_RDONLY);

assert(fd != -1);

std::cout << "test.txt opened, fd=" << fd << std::endl;

usleep(1000 * 300);

// print the file content

char buf[100] = {0};

int ret = read(fd, buf, 5);

std::cout << "read " << ret << " bytes: " << buf << std::endl;

std::cout << "Closing test.txt..." << std::endl;

close(fd);

std::cout << "test.txt closed" << std::endl;

}

return 0;