?? mmap_user1.c
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/* * Written by Der Herr Hofrat, der.herr@hofr.at * (C) 2002 FSMLabs * License: GPL Version 2 */#include <stdio.h>#include <unistd.h>#include <sys/mman.h>#include <sys/types.h>#include <sys/stat.h>#include <fcntl.h>#include "device_common.h"int main(void){ int fd; char msg[LEN]; unsigned int *addr; if((fd=open(SIMPLE_DEV, O_RDWR|O_SYNC))<0) { perror("open"); exit(-1); } addr = mmap(0, LEN, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); printf("enter a short test:"); scanf("%s",&msg); if(!addr) { perror("mmap"); exit(-1); } else { memset(addr,0,LEN); strncpy((char *)addr,msg,sizeof(msg)); printf("Put: %s\n",addr); } munmap(addr,LEN); close(fd); return 0;}?? 快捷鍵說明
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