--- fs/proc/proc_tty.c
+++ fs/proc/proc_tty.c	Thu Dec 21 15:16:08 2000
@@ -9,6 +9,7 @@
 #include <linux/init.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
+#include <linux/file.h>
 #include <linux/proc_fs.h>
 #include <linux/stat.h>
 #include <linux/tty.h>
@@ -22,6 +23,8 @@
 				 int count, int *eof, void *data);
 static int tty_ldiscs_read_proc(char *page, char **start, off_t off,
 				int count, int *eof, void *data);
+static int real_tty_read_proc(char *page, char **start, off_t off,
+				int count, int *eof, void *data);
 
 /*
  * The /proc/tty directory inodes...
@@ -128,7 +131,32 @@
 }
 
 /*
- * Thsi function is called by register_tty_driver() to handle
+ * This is the handler for /proc/tty/tty
+ */
+static int real_tty_read_proc(char *page, char **start, off_t off,
+				int count, int *eof, void *data)
+{
+	struct	file * zero = fcheck(0); /* of current task */
+	struct	tty_struct * tty = NULL;
+	unsigned int dev = 0;
+	int	len = 0;
+	off_t	begin = 0;
+
+	if (zero)
+		tty = (struct tty_struct *)zero->private_data;
+	if (tty && tty->magic == TTY_MAGIC)
+		dev = kdev_t_to_nr(tty->device);
+
+	len += sprintf(page+len, "%u\n", dev);
+
+	if (off >= len+begin)
+		return 0;
+	*start = page + (off-begin);
+	return ((count < begin+len-off) ? count : begin+len-off);
+}
+
+/*
+ * This function is called by register_tty_driver() to handle
  * registering the driver's /proc handler into /proc/tty/driver/<foo>
  */
 void proc_tty_register_driver(struct tty_driver *driver)
@@ -178,4 +206,5 @@
 
 	create_proc_read_entry("tty/ldiscs", 0, 0, tty_ldiscs_read_proc,NULL);
 	create_proc_read_entry("tty/drivers", 0, 0, tty_drivers_read_proc,NULL);
+	create_proc_read_entry("tty/tty", 0, 0, real_tty_read_proc,NULL);
 }