blank_vesa_wait,
};
+/*
+ * /sys/class/tty/tty0/
+ *
+ * the attribute 'active' contains the name of the current vc
+ * console and it supports poll() to detect vc switches
+ */
+static struct device *tty0dev;
+
/*
* Notifier list for console events.
*/
save_screen(old_vc);
set_origin(old_vc);
}
+ if (tty0dev)
+ sysfs_notify(&tty0dev->kobj, NULL, "active");
} else {
hide_cursor(vc);
redraw = 1;
static struct cdev vc0_cdev;
+static ssize_t show_tty_active(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "tty%d\n", fg_console + 1);
+}
+static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL);
+
int __init vty_init(const struct file_operations *console_fops)
{
cdev_init(&vc0_cdev, console_fops);
if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
panic("Couldn't register /dev/tty0 driver\n");
- device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
+ tty0dev = device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
+ if (IS_ERR(tty0dev))
+ tty0dev = NULL;
+ else
+ device_create_file(tty0dev, &dev_attr_active);
vcs_init();