on_release_display (int signal)
{
        int fd;

        fd = open ("/dev/tty0", O_RDWR | O_NOCTTY);
        ioctl(fd, VT_RELDISP, 1);
        close(fd);
}
on_release_display (int signal)
{
        int fd;

        fd = open ("/dev/tty0", O_RDWR | O_NOCTTY);
        ioctl(fd, VT_RELDISP, 1);
        close(fd);
}