Bash-4.0 Official Patch 23

[Chet Ramey]

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

Bash-Release: 4.0
Patch-ID: bash40-023

Bug-Reported-by: Andreas Schwab <schwab@linux-m68k.org>
Bug-Reference-ID: <m21vrhhx08.fsf@igel.home>
Bug-Reference-URL: 
http://lists.gnu.org/archive/html/bug-bash/2009-04/msg00160.html

Bug-Description:

If the prompt length exactly matches the screen width, and the prompt ends
with invisible characters, readline positions the cursor incorrectly.

Patch:

*** ../bash-4.0-patched/lib/readline/display.c  2009-01-04 14:32:32.000000000 
-0500
--- lib/readline/display.c      2009-04-25 21:42:18.000000000 -0400
***************
*** 1895,1898 ****
--- 1897,1904 ----
    woff = WRAP_OFFSET (_rl_last_v_pos, wrap_offset);
    cpos = _rl_last_c_pos;
+ 
+   if (cpos == 0 && cpos == new)
+     return;
+ 
  #if defined (HANDLE_MULTIBYTE)
    /* If we have multibyte characters, NEW is indexed by the buffer point in
***************
*** 1908,1914 ****
         desired display position. */
        if ((new > prompt_last_invisible) ||            /* XXX - don't use woff 
here */
!         (prompt_physical_chars > _rl_screenwidth &&
           _rl_last_v_pos == prompt_last_screen_line &&
!          wrap_offset >= woff &&
           new > 
(prompt_last_invisible-(_rl_screenwidth*_rl_last_v_pos)-wrap_offset)))
           /* XXX last comparison might need to be >= */
--- 1914,1920 ----
         desired display position. */
        if ((new > prompt_last_invisible) ||            /* XXX - don't use woff 
here */
!         (prompt_physical_chars >= _rl_screenwidth &&
           _rl_last_v_pos == prompt_last_screen_line &&
!          wrap_offset >= woff && dpos >= woff &&
           new > 
(prompt_last_invisible-(_rl_screenwidth*_rl_last_v_pos)-wrap_offset)))
           /* XXX last comparison might need to be >= */
*** ../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 22
  
  #endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 23
  
  #endif /* _PATCHLEVEL_H_ */

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer

Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/