Bash-4.0 Official Patch 40

[Chet Ramey]

                             BASH PATCH REPORT
                             =================

Bash-Release:   4.0
Patch-ID:       bash40-040

Bug-Reported-by:        Tavis Ormandy <taviso@cmpxchg8b.com>
Bug-Reference-ID:
Bug-Reference-URL:      http://twitter.com/taviso/statuses/514887394294652929

Bug-Description:

Under certain circumstances, bash can incorrectly save a lookahead character and
return it on a subsequent call, even when reading a new line.

Patch (apply with `patch -p0'):

*** ../bash-4.0.39/parse.y      2009-06-02 09:08:07.000000000 -0400
--- parse.y     2014-09-25 16:15:47.000000000 -0400
***************
*** 2671,2674 ****
--- 2671,2676 ----
    word_desc_to_read = (WORD_DESC *)NULL;
  
+   eol_ungetc_lookahead = 0;
+ 
    current_token = '\n';               /* XXX */
    last_read_token = '\n';
*** ../bash-4.0/patchlevel.h    2009-01-04 14:32:40.000000000 -0500
--- patchlevel.h        2009-02-22 16:11:31.000000000 -0500
***************
*** 26,30 ****
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 39
  
  #endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 40
  
  #endif /* _PATCHLEVEL_H_ */

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/