scull_user.c

来自「linux device drive II 的示例移植到2.6.x内核」· C语言 代码 · 共 29 行

/*
	simple user demo
	
	zhengjie
	[e-mail]
*/

#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include "scull_user.h"

int main(int argc, char *argv[])
{
	int fd, result;
	fd = open("/devfs/scull/0", O_RDWR | O_APPEND);
	if(fd < 0){
		printf("Cannot open the file\n");
		_exit(0);
	}
	result = ioctl(fd, SCULL_IOCTQSET);
	if(result < 0)
		printf("ioctl error\n");
	return 0;
}