console8.txt

来自「linux/kd.h文件中介绍了ioctl函数能够使用的命令」· 文本 代码 · 共 35 行

Example:
	#include <stdio.h>
	#include <fcntl.h>
	#include <unistd.h>
	#include <sys/stat.h>
	#include <linux/kd.h>
	#include <sys/types.h>
	#include <sys/ioctl.h>

	#define ERROR -1

	void main()
	{
          int fd;

          /* To be used as the fd in ioctl(). */
	  if ((fd = open("/dev/console", O_NOCTTY)) == ERROR) {
	     perror("open");
	     exit(ERROR);
	  }

	  printf("w00w00!\n\n");
          printf("(now calling ioctl().. this will probably fail:\n");

          /* Reset the font to the default. */
          if (ioctl(fd, PIO_FONTRESET, 1) == ERROR) {
	     perror("ioctl");
	     close(fd);
	     exit(ERROR);
	  }

          printf("The font is now reset.\n");

	  close(fd);
	}