test.c

linux下的字符设备驱动代码

#include <stdio.h>
int main(){
	 char *source="1234567890";
         char destination[12];
         destination[11]='\0';
         int fd=open("/dev/VFIFO",2);
         if(fd==-1){
               printf("file open fail!!\n");
	       return 0;
         }
         write(fd,source,10);
         close(fd);

         fd=open("/dev/VFIFO",2);
         if(fd==-1){
               printf("file open fail!!\n");
	       return 0;
         }
         read(fd,destination,10);
         close(fd);

         printf("The data translated by the virtual device VFIFO is: %s\n",destination);
	 return 0;
}