¶ÁдlinuxÉ豸Îļþ

#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#define DIR "/dev/firstdriver"

int main(void)
{
 int fd;
 char arr[1000];
 char *str="hello china";
 fd = open(DIR, O_RDWR|O_NONBLOCK);
 if(-1!=fd)
 { 

  printf("The writen string is : %s\n",str);
  write(fd,str,strlen(str)+1); 
  read(fd,arr,strlen(str)+1);
  printf("%s\n", arr);
  
  close(fd);
  //write();
 }
 else
 {
  perror("read /dev/firstdriver");
 }
  
 return 0;
}