--- tty.py-orig	Sun Dec 19 15:14:41 2004
+++ tty.py	Sun Dec 19 15:21:11 2004
@@ -3,8 +3,9 @@
 # Author: Steen Lumholt.
 
 from termios import *
+from copy import deepcopy
 
-__all__ = ["setraw", "setcbreak"]
+__all__ = ["setraw", "setcbreak", "setsane"]
 
 # Indexes for termios list.
 IFLAG = 0
@@ -15,9 +16,13 @@
 OSPEED = 5
 CC = 6
 
+_mode = None
+
 def setraw(fd, when=TCSAFLUSH):
     """Put terminal into a raw mode."""
+    global _mode
     mode = tcgetattr(fd)
+    _mode = deepcopy(mode)
     mode[IFLAG] = mode[IFLAG] & ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON)
     mode[OFLAG] = mode[OFLAG] & ~(OPOST)
     mode[CFLAG] = mode[CFLAG] & ~(CSIZE | PARENB)
@@ -29,8 +34,17 @@
 
 def setcbreak(fd, when=TCSAFLUSH):
     """Put terminal into a cbreak mode."""
+    global _mode
     mode = tcgetattr(fd)
+    _mode = deepcopy(mode)
     mode[LFLAG] = mode[LFLAG] & ~(ECHO | ICANON)
     mode[CC][VMIN] = 1
     mode[CC][VTIME] = 0
     tcsetattr(fd, when, mode)
+
+def setsane(fd, when=TCSAFLUSH):
+    """Put terminal in a sane mode"""
+    global _mode
+    if _mode:
+        tcsetattr(fd, when, _mode)
+        _mode = None