#include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <sys/mman.h> #include <sys/stat.h> #include <sys/types.h> int main(void) { int fd = open("main.c", O_RDONLY); char* data = mmap(NULL, 1024, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); printf("%s", data); return 0; }