console11.txt

linux/kd.h文件中介绍了ioctl函数能够使用的命令

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 NONE   0
	#define ERROR -1

	void main()
	{
          int fd;
          long mode;

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

	  printf("w00w00!\n\n");

          if ((ioctl(fd, KDGKBMETA, &mode)) == ERROR) {
	     perror("ioctl");
	     close(fd);
	     exit(ERROR);
	  }

          printf("Meta key handler is ");
          if (mode == NONE) printf("not set.\n");
          else if (mode == K_METABIT) printf("setting high order bit.\n");
          else if (mode == K_ESCPREFIX) printf("the escape prefix.\n");
	  else printf("0x0%x\n", mode); /* For future modes.\n");

          putchar('\n');

	  close(fd);
	}