#include<sys/mman.h>
#include<stdio.h>
#include<fcntl.h>
#include<unistd.h>

int main(){
	int fd = open("mmap_demo.c", O_RDWR);
	void *file_region = mmap(0, 1024, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);

	printf(file_region);

	munmap(file_region, 1024);
	close(fd);
	return 0;
}