Bash-3.2 Official Patch 19

[Chet Ramey]

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

Bash-Release: 3.2
Patch-ID: bash32-019

Bug-Reported-by:        Thomas Loeber <ifp@loeber1.de>
Bug-Reference-ID:       <200703082223.08919.ifp@loeber1.de>
Bug-Reference-URL:      
http://lists.gnu.org/archive/html/bug-bash/2007-03/msg00036.html

Bug-Description:

When rl_read_key returns -1, indicating that bash's controlling terminal
has been invalidated for some reason (e.g., receiving a SIGHUP), the error
status was not reported correctly to the caller.  This could cause input
loops. 

Patch:

*** ../bash-3.2-patched/lib/readline/complete.c Fri Jul 28 11:35:49 2006
--- lib/readline/complete.c     Tue Mar 13 08:50:16 2007
***************
*** 429,433 ****
        if (c == 'n' || c == 'N' || c == RUBOUT)
        return (0);
!       if (c == ABORT_CHAR)
        _rl_abort_internal ();
        if (for_pager && (c == NEWLINE || c == RETURN))
--- 440,444 ----
        if (c == 'n' || c == 'N' || c == RUBOUT)
        return (0);
!       if (c == ABORT_CHAR || c < 0)
        _rl_abort_internal ();
        if (for_pager && (c == NEWLINE || c == RETURN))
*** ../bash-3.2-patched/lib/readline/input.c    Wed Aug 16 15:15:16 2006
--- lib/readline/input.c        Wed May  2 16:07:59 2007
***************
*** 514,518 ****
       int size;
  {
!   int mb_len = 0;
    size_t mbchar_bytes_length;
    wchar_t wc;
--- 522,526 ----
       int size;
  {
!   int mb_len, c;
    size_t mbchar_bytes_length;
    wchar_t wc;
***************
*** 521,531 ****
    memset(&ps, 0, sizeof (mbstate_t));
    memset(&ps_back, 0, sizeof (mbstate_t));
!   
    while (mb_len < size)
      {
        RL_SETSTATE(RL_STATE_MOREINPUT);
!       mbchar[mb_len++] = rl_read_key ();
        RL_UNSETSTATE(RL_STATE_MOREINPUT);
  
        mbchar_bytes_length = mbrtowc (&wc, mbchar, mb_len, &ps);
        if (mbchar_bytes_length == (size_t)(-1))
--- 529,545 ----
    memset(&ps, 0, sizeof (mbstate_t));
    memset(&ps_back, 0, sizeof (mbstate_t));
! 
!   mb_len = 0;  
    while (mb_len < size)
      {
        RL_SETSTATE(RL_STATE_MOREINPUT);
!       c = rl_read_key ();
        RL_UNSETSTATE(RL_STATE_MOREINPUT);
  
+       if (c < 0)
+       break;
+ 
+       mbchar[mb_len++] = c;
+ 
        mbchar_bytes_length = mbrtowc (&wc, mbchar, mb_len, &ps);
        if (mbchar_bytes_length == (size_t)(-1))
***************
*** 565,569 ****
    c = first;
    memset (mb, 0, mlen);
!   for (i = 0; i < mlen; i++)
      {
        mb[i] = (char)c;
--- 579,583 ----
    c = first;
    memset (mb, 0, mlen);
!   for (i = 0; c >= 0 && i < mlen; i++)
      {
        mb[i] = (char)c;
*** ../bash-3.2-patched/lib/readline/isearch.c  Mon Dec 26 17:18:53 2005
--- lib/readline/isearch.c      Fri Mar  9 14:30:59 2007
***************
*** 328,333 ****
  
    f = (rl_command_func_t *)NULL;
!  
!  /* Translate the keys we do something with to opcodes. */
    if (c >= 0 && _rl_keymap[c].type == ISFUNC)
      {
--- 328,340 ----
  
    f = (rl_command_func_t *)NULL;
! 
!   if (c < 0)
!     {
!       cxt->sflags |= SF_FAILED;
!       cxt->history_pos = cxt->last_found_line;
!       return -1;
!     }
! 
!   /* Translate the keys we do something with to opcodes. */
    if (c >= 0 && _rl_keymap[c].type == ISFUNC)
      {
*** ../bash-3.2-patched/lib/readline/misc.c     Mon Dec 26 17:20:46 2005
--- lib/readline/misc.c Fri Mar  9 14:44:11 2007
***************
*** 147,150 ****
--- 147,152 ----
          rl_clear_message ();
          RL_UNSETSTATE(RL_STATE_NUMERICARG);
+         if (key < 0)
+           return -1;
          return (_rl_dispatch (key, _rl_keymap));
        }
*** ../bash-3.2-patched/lib/readline/readline.c Wed Aug 16 15:00:36 2006
--- lib/readline/readline.c     Fri Mar  9 14:47:24 2007
***************
*** 646,649 ****
--- 669,677 ----
      {
        nkey = _rl_subseq_getchar (cxt->okey);
+       if (nkey < 0)
+       {
+         _rl_abort_internal ();
+         return -1;
+       }
        r = _rl_dispatch_subseq (nkey, cxt->dmap, cxt->subseq_arg);
        cxt->flags |= KSEQ_DISPATCHED;
*** ../bash-3.2-patched/lib/readline/text.c     Fri Jul 28 11:55:27 2006
--- lib/readline/text.c Sun Mar 25 13:41:38 2007
***************
*** 858,861 ****
--- 864,870 ----
    RL_UNSETSTATE(RL_STATE_MOREINPUT);
  
+   if (c < 0)
+     return -1;
+ 
  #if defined (HANDLE_SIGNALS)
    if (RL_ISSTATE (RL_STATE_CALLBACK) == 0)
***************
*** 1521,1524 ****
--- 1530,1536 ----
    mb_len = _rl_read_mbchar (mbchar, MB_LEN_MAX);
  
+   if (mb_len <= 0)
+     return -1;
+ 
    if (count < 0)
      return (_rl_char_search_internal (-count, bdir, mbchar, mb_len));
***************
*** 1537,1540 ****
--- 1549,1555 ----
    RL_UNSETSTATE(RL_STATE_MOREINPUT);
  
+   if (c < 0)
+     return -1;
+ 
    if (count < 0)
      return (_rl_char_search_internal (-count, bdir, c));
*** ../bash-3.2-patched/lib/readline/vi_mode.c  Sat Jul 29 16:42:28 2006
--- lib/readline/vi_mode.c      Fri Mar  9 15:02:11 2007
***************
*** 887,890 ****
--- 887,897 ----
    c = rl_read_key ();
    RL_UNSETSTATE(RL_STATE_MOREINPUT);
+ 
+   if (c < 0)
+     {
+       *nextkey = 0;
+       return -1;
+     }
+ 
    *nextkey = c;
  
***************
*** 903,906 ****
--- 910,918 ----
          c = rl_read_key ();   /* real command */
          RL_UNSETSTATE(RL_STATE_MOREINPUT);
+         if (c < 0)
+           {
+             *nextkey = 0;
+             return -1;
+           }
          *nextkey = c;
        }
***************
*** 1225,1236 ****
       _rl_callback_generic_arg *data;
  {
  #if defined (HANDLE_MULTIBYTE)
!   _rl_vi_last_search_mblen = _rl_read_mbchar (_rl_vi_last_search_mbchar, 
MB_LEN_MAX);
  #else
    RL_SETSTATE(RL_STATE_MOREINPUT);
!   _rl_vi_last_search_char = rl_read_key ();
    RL_UNSETSTATE(RL_STATE_MOREINPUT);
  #endif
  
    _rl_callback_func = 0;
    _rl_want_redisplay = 1;
--- 1243,1262 ----
       _rl_callback_generic_arg *data;
  {
+   int c;
  #if defined (HANDLE_MULTIBYTE)
!   c = _rl_vi_last_search_mblen = _rl_read_mbchar (_rl_vi_last_search_mbchar, 
MB_LEN_MAX);
  #else
    RL_SETSTATE(RL_STATE_MOREINPUT);
!   c = rl_read_key ();
    RL_UNSETSTATE(RL_STATE_MOREINPUT);
  #endif
  
+   if (c <= 0)
+     return -1;
+ 
+ #if !defined (HANDLE_MULTIBYTE)
+   _rl_vi_last_search_char = c;
+ #endif
+ 
    _rl_callback_func = 0;
    _rl_want_redisplay = 1;
***************
*** 1248,1251 ****
--- 1274,1278 ----
       int count, key;
  {
+   int c;
  #if defined (HANDLE_MULTIBYTE)
    static char *target;
***************
*** 1294,1302 ****
        {
  #if defined (HANDLE_MULTIBYTE)
!         _rl_vi_last_search_mblen = _rl_read_mbchar 
(_rl_vi_last_search_mbchar, MB_LEN_MAX);
  #else
          RL_SETSTATE(RL_STATE_MOREINPUT);
!         _rl_vi_last_search_char = rl_read_key ();
          RL_UNSETSTATE(RL_STATE_MOREINPUT);
  #endif
        }
--- 1321,1335 ----
        {
  #if defined (HANDLE_MULTIBYTE)
!         c = _rl_read_mbchar (_rl_vi_last_search_mbchar, MB_LEN_MAX);
!         if (c <= 0)
!           return -1;
!         _rl_vi_last_search_mblen = c;
  #else
          RL_SETSTATE(RL_STATE_MOREINPUT);
!         c = rl_read_key ();
          RL_UNSETSTATE(RL_STATE_MOREINPUT);
+         if (c < 0)
+           return -1;
+         _rl_vi_last_search_char = c;
  #endif
        }
***************
*** 1468,1471 ****
--- 1501,1507 ----
    RL_UNSETSTATE(RL_STATE_MOREINPUT);
  
+   if (c < 0)
+     return -1;
+ 
  #if defined (HANDLE_MULTIBYTE)
    if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
***************
*** 1486,1489 ****
--- 1522,1528 ----
    _rl_vi_last_replacement = c = _rl_vi_callback_getchar (mb, MB_LEN_MAX);
  
+   if (c < 0)
+     return -1;
+ 
    _rl_callback_func = 0;
    _rl_want_redisplay = 1;
***************
*** 1517,1520 ****
--- 1556,1562 ----
      _rl_vi_last_replacement = c = _rl_vi_callback_getchar (mb, MB_LEN_MAX);
  
+   if (c < 0)
+     return -1;
+ 
    return (_rl_vi_change_char (count, c, mb));
  }
***************
*** 1651,1655 ****
    RL_UNSETSTATE(RL_STATE_MOREINPUT);
  
!   if (ch < 'a' || ch > 'z')
      {
        rl_ding ();
--- 1693,1697 ----
    RL_UNSETSTATE(RL_STATE_MOREINPUT);
  
!   if (ch < 0 || ch < 'a' || ch > 'z') /* make test against 0 explicit */
      {
        rl_ding ();
***************
*** 1703,1707 ****
        return 0;
      }
!   else if (ch < 'a' || ch > 'z')
      {
        rl_ding ();
--- 1745,1749 ----
        return 0;
      }
!   else if (ch < 0 || ch < 'a' || ch > 'z')    /* make test against 0 explicit 
*/
      {
        rl_ding ();
*** ../bash-3.2/patchlevel.h    Thu Apr 13 08:31:04 2006
--- patchlevel.h        Mon Oct 16 14:22:54 2006
***************
*** 26,30 ****
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 18
  
  #endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 19
  
  #endif /* _PATCHLEVEL_H_ */

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                       Live Strong.  No day but today.
Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/