/* * Written by Der Herr Hofrat, der.herr@hofr.at * (C) 2002 FSMLabs * License: GPL Version 2 *//* *  Example of reading shared memory from user-space */#include <stdlib.h>#include <stdio.h>#include <fcntl.h>#include <unistd.h>#include <sys/mman.h>#include "hello.h"struct shared_mem_struct* shared_mem;int memfd;int main(){	char input[40];	memfd = open("/dev/mem", O_RDONLY);	if (memfd)	{	  shared_mem = (struct shared_mem_struct*) mmap(0,	  	sizeof(struct shared_mem_struct),	  	PROT_READ, MAP_FILE | MAP_SHARED, memfd, MEMORY_OFFSET);	  if (shared_mem != NULL)	  {  			  do			{				printf("found: %d %d\n",					shared_mem->some_int,					(int)shared_mem->ready);				sleep(1);			}			while (1);		}		else			printf("Failed to map memory\n");		close (memfd);	}	else{		printf("Failed to open memory device file\n");		exit(-1);		}	close(memfd);	return 0;}