test.c

Linux下的简单字符设备驱动的源码

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
int main(void)
{
  int file;
  int i;
  char wbuf[11];
  char rbuf[11];
   wbuf[10]='\0';//结束符
   rbuf[10]='\0';
 file= open("/dev/wxw",O_RDWR);
  if (file== -1 ){
    printf("Cann't open file \n");
    return -1;
  }
    for(i=0;i<10;++i)wbuf[i] = i+'a';

    write(file,wbuf,10);
    printf("write to /dev/wxw\n");
    printf("data: %s\n\n",wbuf);

    read(file,rbuf,10);
    printf("read form /dev/wxw\n");
    printf("data: %s\n",rbuf);



    close(file); 
return 0;

}