console18.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/vt.h>
	#include <sys/types.h>
	#include <sys/ioctl.h>

	#define ERROR -1

 	void main()
	{
          int fd;
	  struct vt_stat stat;

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

          /* used as fd for ioctl() */
          if ((fd = open("/dev/tty", O_NOCTTY)) == ERROR) {
	        perror("open");
	        exit(ERROR);
          }

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

          printf("Current VT: tty%d\n", stat.v_active);
          printf("Signal to send: %d\n", stat.v_signal);
          printf("VT bitmask: %d\n", stat.v_state);
          
          close(fd);
        }