source: patches/bash-4.3-branch_update-4.patch@ acf474d

arrayfunc.c

@@ -179 +179 @@
     array_insert (array_cell (entry), ind, newval);
   FREE (newval);
 
+  VUNSETATTR (entry, att_invisible);    /* no longer invisible */
   return (entry);
 }
 
@@ -597 +598 @@
       if (assoc_p (var))
         {
           val = expand_assignment_string_to_string (val, 0);
+          if (val == 0)
+            {
+              val = (char *)xmalloc (1);
+              val[0] = '\0';    /* like do_assignment_internal */
+            }
           free_val = 1;
         }
 

bashline.c

@@ -4167 +4167 @@
   int qc;
 
   qc = rl_dispatching ? rl_completion_quote_character : 0;  
-  dfn = bash_dequote_filename ((char *)text, qc);
+  /* If rl_completion_found_quote != 0, rl_completion_matches will call the
+     filename dequoting function, causing the directory name to be dequoted
+     twice. */
+  if (rl_dispatching && rl_completion_found_quote == 0)
+    dfn = bash_dequote_filename ((char *)text, qc);
+  else
+    dfn = (char *)text;
   m1 = rl_completion_matches (dfn, rl_filename_completion_function);
-  free (dfn);
+  if (dfn != text)
+    free (dfn);
 
   if (m1 == 0 || m1[0] == 0)
     return m1;

builtins/common.h

@@ -33 +33 @@
 #define SEVAL_RESETLINE 0x010
 #define SEVAL_PARSEONLY 0x020
 #define SEVAL_NOLONGJMP 0x040
+#define SEVAL_FUNCDEF   0x080           /* only allow function definitions */
+#define SEVAL_ONECMD    0x100           /* only allow a single command */
 
 /* Flags for describe_command, shared between type.def and command.def */
 #define CDESC_ALL               0x001   /* type -a */

builtins/evalstring.c

@@ -308 +308 @@
             {
               struct fd_bitmap *bitmap;
 
+              if ((flags & SEVAL_FUNCDEF) && command->type != cm_function_def)
+                {
+                  internal_warning ("%s: ignoring function definition attempt", from_file);
+                  should_jump_to_top_level = 0;
+                  last_result = last_command_exit_value = EX_BADUSAGE;
+                  break;
+                }
+
               bitmap = new_fd_bitmap (FD_BITMAP_SIZE);
               begin_unwind_frame ("pe_dispose");
               add_unwind_protect (dispose_fd_bitmap, bitmap);
@@ -368 +376 @@
               dispose_command (command);
               dispose_fd_bitmap (bitmap);
               discard_unwind_frame ("pe_dispose");
+
+              if (flags & SEVAL_ONECMD)
+                break;
             }
         }
       else

builtins/read.def

@@ -442 +442 @@
       add_unwind_protect (reset_alarm, (char *)NULL);
 #if defined (READLINE)
       if (edit)
-        add_unwind_protect (reset_attempted_completion_function, (char *)NULL);
+        {
+          add_unwind_protect (reset_attempted_completion_function, (char *)NULL);
+          add_unwind_protect (bashline_reset_event_hook, (char *)NULL);
+        }
 #endif
       falarm (tmsec, tmusec);
     }
@@ -1021 +1024 @@
 
   old_attempted_completion_function = rl_attempted_completion_function;
   rl_attempted_completion_function = (rl_completion_func_t *)NULL;
+  bashline_set_event_hook ();
   if (itext)
     {
       old_startup_hook = rl_startup_hook;
@@ -1032 +1036 @@
 
   rl_attempted_completion_function = old_attempted_completion_function;
   old_attempted_completion_function = (rl_completion_func_t *)NULL;
+  bashline_reset_event_hook ();
 
   if (ret == 0)
     return ret;

execute_cmd.c

@@ -2409 +2409 @@
 #endif
       lstdin = wait_for (lastpid);
 #if defined (JOB_CONTROL)
-      exec_result = job_exit_status (lastpipe_jid);
+      /* If wait_for removes the job from the jobs table, use result of last
+         command as pipeline's exit status as usual.  The jobs list can get
+         frozen and unfrozen at inconvenient times if there are multiple pipelines
+         running simultaneously. */
+      if (INVALID_JOB (lastpipe_jid) == 0)
+        exec_result = job_exit_status (lastpipe_jid);
+      else if (pipefail_opt)
+        exec_result = exec_result | lstdin;     /* XXX */
+      /* otherwise we use exec_result */
+        
 #endif
       unfreeze_jobs_list ();
     }

externs.h

@@ -324 +324 @@
 extern char *sh_backslash_quote __P((char *, const char *, int));
 extern char *sh_backslash_quote_for_double_quotes __P((char *));
 extern int sh_contains_shell_metas __P((char *));
+extern int sh_contains_quotes __P((char *));
 
 /* declarations for functions defined in lib/sh/spell.c */
 extern int spname __P((char *, char *));

bash-4.3

@@ -3597 +3597 @@
   unwind_protect_int (jobs_list_frozen);
   unwind_protect_pointer (the_pipeline);
   unwind_protect_pointer (subst_assign_varlist);
+  unwind_protect_pointer (this_shell_builtin);
 
   /* We have to add the commands this way because they will be run
      in reverse order of adding.  We don't want maybe_set_sigchld_trap ()
@@ -4374 +4375 @@
 void
 end_job_control ()
 {
-  if (interactive_shell)                /* XXX - should it be interactive? */
+  if (interactive_shell || job_control)         /* XXX - should it be just job_control? */
     {
       terminate_stopped_jobs ();
 

lib/glob/glob.c

@@ -123 +123 @@
 extern char *glob_patscan __P((char *, char *, int));
 extern wchar_t *glob_patscan_wc __P((wchar_t *, wchar_t *, int));
 
+extern char *glob_dirscan __P((char *, int));
+
 /* Compile `glob_loop.c' for single-byte characters. */
 #define CHAR    unsigned char
 #define INT     int
@@ -179 +181 @@
      char *pat, *dname;
      int flags;
 {
-  char *pp, *pe, *t;
-  int n, r;
+  char *pp, *pe, *t, *se;
+  int n, r, negate;
 
+  negate = *pat == '!';
   pp = pat + 2;
-  pe = pp + strlen (pp) - 1;    /*(*/
-  if (*pe != ')')
+  se = pp + strlen (pp) - 1;            /* end of string */
+  pe = glob_patscan (pp, se, 0);        /* end of extglob pattern (( */
+  /* we should check for invalid extglob pattern here */
+  if (pe == 0)
     return 0;
-  if ((t = strchr (pp, '|')) == 0)      /* easy case first */
+
+  /* if pe != se we have more of the pattern at the end of the extglob
+     pattern. Check the easy case first ( */
+  if (pe == se && *pe == ')' && (t = strchr (pp, '|')) == 0)
     {
       *pe = '\0';
+#if defined (HANDLE_MULTIBYTE)
+      r = mbskipname (pp, dname, flags);
+#else
       r = skipname (pp, dname, flags);  /*(*/
+#endif
       *pe = ')';
       return r;
     }
+
+  /* check every subpattern */
   while (t = glob_patscan (pp, pe, '|'))
     {
       n = t[-1];
       t[-1] = '\0';
+#if defined (HANDLE_MULTIBYTE)
+      r = mbskipname (pp, dname, flags);
+#else
       r = skipname (pp, dname, flags);
+#endif
       t[-1] = n;
       if (r == 0)       /* if any pattern says not skip, we don't skip */
         return r;
       pp = t;
     }   /*(*/
 
-  if (pp == pe)         /* glob_patscan might find end of pattern */
+  /* glob_patscan might find end of pattern */
+  if (pp == se)
     return r;
 
-  *pe = '\0';
-#  if defined (HANDLE_MULTIBYTE)
-  r = mbskipname (pp, dname, flags);    /*(*/
-#  else
-  r = skipname (pp, dname, flags);      /*(*/
-#  endif
-  *pe = ')';
-  return r;
+  /* but if it doesn't then we didn't match a leading dot */
+  return 0;
 }
 #endif
 
@@ -277 +290 @@
      int flags;
 {
 #if EXTENDED_GLOB
-  wchar_t *pp, *pe, *t, n;
-  int r;
+  wchar_t *pp, *pe, *t, n, *se;
+  int r, negate;
 
+  negate = *pat == L'!';
   pp = pat + 2;
-  pe = pp + wcslen (pp) - 1;    /*(*/
-  if (*pe != L')')
-    return 0;
-  if ((t = wcschr (pp, L'|')) == 0)
+  se = pp + wcslen (pp) - 1;    /*(*/
+  pe = glob_patscan_wc (pp, se, 0);
+
+  if (pe == se && *pe == ')' && (t = wcschr (pp, L'|')) == 0)
     {
       *pe = L'\0';
       r = wchkname (pp, dname); /*(*/
       *pe = L')';
       return r;
     }
+
+  /* check every subpattern */
   while (t = glob_patscan_wc (pp, pe, '|'))
     {
       n = t[-1];
@@ -305 +321 @@
   if (pp == pe)         /* glob_patscan_wc might find end of pattern */
     return r;
 
-  *pe = L'\0';
-  r = wchkname (pp, dname);     /*(*/
-  *pe = L')';
-  return r;
+  /* but if it doesn't then we didn't match a leading dot */
+  return 0;
 #else
   return (wchkname (pat, dname));
 #endif
@@ -1006 +1020 @@
 {
   char **result;
   unsigned int result_size;
-  char *directory_name, *filename, *dname;
+  char *directory_name, *filename, *dname, *fn;
   unsigned int directory_len;
   int free_dirname;                     /* flag */
   int dflags;
@@ -1022 +1036 @@
 
   /* Find the filename.  */
   filename = strrchr (pathname, '/');
+#if defined (EXTENDED_GLOB)
+  if (filename && extended_glob)
+    {
+      fn = glob_dirscan (pathname, '/');
+#if DEBUG_MATCHING
+      if (fn != filename)
+        fprintf (stderr, "glob_filename: glob_dirscan: fn (%s) != filename (%s)\n", fn ? fn : "(null)", filename);
+#endif
+      filename = fn;
+    }
+#endif
+
   if (filename == NULL)
     {
       filename = pathname;

lib/glob/gmisc.c

@@ -42 +42 @@
 #define WLPAREN         L'('
 #define WRPAREN         L')'
 
+extern char *glob_patscan __P((char *, char *, int));
+
 /* Return 1 of the first character of WSTRING could match the first
    character of pattern WPAT.  Wide character version. */
 int
@@ -210 +212 @@
     case '+':
     case '!':
     case '@':
+    case '?':
       return (pat[1] == LPAREN);
     default:
       return 0;
@@ -374 +377 @@
 
   return matlen;
 }
+
+/* Skip characters in PAT and return the final occurrence of DIRSEP.  This
+   is only called when extended_glob is set, so we have to skip over extglob
+   patterns x(...) */
+char *
+glob_dirscan (pat, dirsep)
+     char *pat;
+     int dirsep;
+{
+  char *p, *d, *pe, *se;
+
+  d = pe = se = 0;
+  for (p = pat; p && *p; p++)
+    {
+      if (extglob_pattern_p (p))
+        {
+          if (se == 0)
+            se = p + strlen (p) - 1;
+          pe = glob_patscan (p + 2, se, 0);
+          if (pe == 0)
+            continue;
+          else if (*pe == 0)
+            break;
+          p = pe - 1;   /* will do increment above */
+          continue;
+        }
+      if (*p ==  dirsep)
+        d = p;
+    }
+  return d;
+}

lib/readline/display.c

@@ -1637 +1637 @@
   /* If we are changing the number of invisible characters in a line, and
      the spot of first difference is before the end of the invisible chars,
      lendiff needs to be adjusted. */
-  if (current_line == 0 && !_rl_horizontal_scroll_mode &&
+  if (current_line == 0 && /* !_rl_horizontal_scroll_mode && */
       current_invis_chars != visible_wrap_offset)
     {
       if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
@@ -1825 +1825 @@
               else
                 _rl_last_c_pos += bytes_to_insert;
 
+              /* XXX - we only want to do this if we are at the end of the line
+                 so we move there with _rl_move_cursor_relative */
               if (_rl_horizontal_scroll_mode && ((oe-old) > (ne-new)))
-                goto clear_rest_of_line;
+                {
+                  _rl_move_cursor_relative (ne-new, new);
+                  goto clear_rest_of_line;
+                }
             }
         }
       /* Otherwise, print over the existing material. */
@@ -2677 +2682 @@
 {
   if (_rl_echoing_p)
     {
-      _rl_move_vert (_rl_vis_botlin);
+      if (_rl_vis_botlin > 0)   /* minor optimization plus bug fix */
+        _rl_move_vert (_rl_vis_botlin);
       _rl_vis_botlin = 0;
       fflush (rl_outstream);
       rl_restart_output (1, 0);

lib/readline/input.c

@@ -534 +534 @@
         return (RL_ISSTATE (RL_STATE_READCMD) ? READERR : EOF);
       else if (_rl_caught_signal == SIGHUP || _rl_caught_signal == SIGTERM)
         return (RL_ISSTATE (RL_STATE_READCMD) ? READERR : EOF);
+      /* keyboard-generated signals of interest */
       else if (_rl_caught_signal == SIGINT || _rl_caught_signal == SIGQUIT)
         RL_CHECK_SIGNALS ();
+      /* non-keyboard-generated signals of interest */
+      else if (_rl_caught_signal == SIGALRM
+#if defined (SIGVTALRM)
+                || _rl_caught_signal == SIGVTALRM
+#endif
+              )
+        RL_CHECK_SIGNALS ();
 
       if (rl_signal_event_hook)
         (*rl_signal_event_hook) ();

lib/readline/misc.c

@@ -461 +461 @@
             saved_undo_list = 0;
           /* Set up rl_line_buffer and other variables from history entry */
           rl_replace_from_history (entry, 0);   /* entry->line is now current */
+          entry->data = 0;                      /* entry->data is now current undo list */
           /* Undo all changes to this history entry */
           while (rl_undo_list)
             rl_do_undo ();
@@ -468 +469 @@
              the timestamp. */
           FREE (entry->line);
           entry->line = savestring (rl_line_buffer);
-          entry->data = 0;
         }
       entry = previous_history ();
     }

lib/readline/readline.c

@@ -744 +744 @@
     r = _rl_subseq_result (r, cxt->oldmap, cxt->okey, (cxt->flags & KSEQ_SUBSEQ));
 
   RL_CHECK_SIGNALS ();
-  if (r == 0)                   /* success! */
+  /* We only treat values < 0 specially to simulate recursion. */
+  if (r >= 0 || (r == -1 && (cxt->flags & KSEQ_SUBSEQ) == 0))   /* success! or failure! */
     {
       _rl_keyseq_chain_dispose ();
       RL_UNSETSTATE (RL_STATE_MULTIKEY);
@@ -964 +965 @@
 #if defined (VI_MODE)
   if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap &&
       key != ANYOTHERKEY &&
-      rl_key_sequence_length == 1 &&    /* XXX */
+      _rl_dispatching_keymap == vi_movement_keymap &&
       _rl_vi_textmod_command (key))
     _rl_vi_set_last (key, rl_numeric_arg, rl_arg_sign);
 #endif

lib/readline/readline.c.orig

@@ +1 @@
+/* readline.c -- a general facility for reading lines of input
+   with emacs style editing and completion. */
+
+/* Copyright (C) 1987-2013 Free Software Foundation, Inc.
+
+   This file is part of the GNU Readline Library (Readline), a library
+   for reading lines of text with interactive input and history editing.      
+
+   Readline is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   Readline is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Readline.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#define READLINE_LIBRARY
+
+#if defined (HAVE_CONFIG_H)
+#  include <config.h>
+#endif
+
+#include <sys/types.h>
+#include "posixstat.h"
+#include <fcntl.h>
+#if defined (HAVE_SYS_FILE_H)
+#  include <sys/file.h>
+#endif /* HAVE_SYS_FILE_H */
+
+#if defined (HAVE_UNISTD_H)
+#  include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+
+#if defined (HAVE_STDLIB_H)
+#  include <stdlib.h>
+#else
+#  include "ansi_stdlib.h"
+#endif /* HAVE_STDLIB_H */
+
+#if defined (HAVE_LOCALE_H)
+#  include <locale.h>
+#endif
+
+#include <stdio.h>
+#include "posixjmp.h"
+#include <errno.h>
+
+#if !defined (errno)
+extern int errno;
+#endif /* !errno */
+
+/* System-specific feature definitions and include files. */
+#include "rldefs.h"
+#include "rlmbutil.h"
+
+#if defined (__EMX__)
+#  define INCL_DOSPROCESS
+#  include <os2.h>
+#endif /* __EMX__ */
+
+/* Some standard library routines. */
+#include "readline.h"
+#include "history.h"
+
+#include "rlprivate.h"
+#include "rlshell.h"
+#include "xmalloc.h"
+
+#ifndef RL_LIBRARY_VERSION
+#  define RL_LIBRARY_VERSION "5.1"
+#endif
+
+#ifndef RL_READLINE_VERSION
+#  define RL_READLINE_VERSION   0x0501
+#endif
+
+extern void _rl_free_history_entry PARAMS((HIST_ENTRY *));
+
+#if defined (COLOR_SUPPORT)
+extern void _rl_parse_colors PARAMS((void));            /* XXX */
+#endif
+
+
+/* Forward declarations used in this file. */
+static char *readline_internal PARAMS((void));
+static void readline_initialize_everything PARAMS((void));
+
+static void bind_arrow_keys_internal PARAMS((Keymap));
+static void bind_arrow_keys PARAMS((void));
+
+static void readline_default_bindings PARAMS((void));
+static void reset_default_bindings PARAMS((void));
+
+static int _rl_subseq_result PARAMS((int, Keymap, int, int));
+static int _rl_subseq_getchar PARAMS((int));
+
+/* **************************************************************** */
+/*                                                                  */
+/*                      Line editing input utility                  */
+/*                                                                  */
+/* **************************************************************** */
+
+const char *rl_library_version = RL_LIBRARY_VERSION;
+
+int rl_readline_version = RL_READLINE_VERSION;
+
+/* True if this is `real' readline as opposed to some stub substitute. */
+int rl_gnu_readline_p = 1;
+
+/* A pointer to the keymap that is currently in use.
+   By default, it is the standard emacs keymap. */
+Keymap _rl_keymap = emacs_standard_keymap;
+
+/* The current style of editing. */
+int rl_editing_mode = emacs_mode;
+
+/* The current insert mode:  input (the default) or overwrite */
+int rl_insert_mode = RL_IM_DEFAULT;
+
+/* Non-zero if we called this function from _rl_dispatch().  It's present
+   so functions can find out whether they were called from a key binding
+   or directly from an application. */
+int rl_dispatching;
+
+/* Non-zero if the previous command was a kill command. */
+int _rl_last_command_was_kill = 0;
+
+/* The current value of the numeric argument specified by the user. */
+int rl_numeric_arg = 1;
+
+/* Non-zero if an argument was typed. */
+int rl_explicit_arg = 0;
+
+/* Temporary value used while generating the argument. */
+int rl_arg_sign = 1;
+
+/* Non-zero means we have been called at least once before. */
+static int rl_initialized;
+
+#if 0
+/* If non-zero, this program is running in an EMACS buffer. */
+static int running_in_emacs;
+#endif
+
+/* Flags word encapsulating the current readline state. */
+int rl_readline_state = RL_STATE_NONE;
+
+/* The current offset in the current input line. */
+int rl_point;
+
+/* Mark in the current input line. */
+int rl_mark;
+
+/* Length of the current input line. */
+int rl_end;
+
+/* Make this non-zero to return the current input_line. */
+int rl_done;
+
+/* The last function executed by readline. */
+rl_command_func_t *rl_last_func = (rl_command_func_t *)NULL;
+
+/* Top level environment for readline_internal (). */
+procenv_t _rl_top_level;
+
+/* The streams we interact with. */
+FILE *_rl_in_stream, *_rl_out_stream;
+
+/* The names of the streams that we do input and output to. */
+FILE *rl_instream = (FILE *)NULL;
+FILE *rl_outstream = (FILE *)NULL;
+
+/* Non-zero means echo characters as they are read.  Defaults to no echo;
+   set to 1 if there is a controlling terminal, we can get its attributes,
+   and the attributes include `echo'.  Look at rltty.c:prepare_terminal_settings
+   for the code that sets it. */
+int _rl_echoing_p = 0;
+
+/* Current prompt. */
+char *rl_prompt = (char *)NULL;
+int rl_visible_prompt_length = 0;
+
+/* Set to non-zero by calling application if it has already printed rl_prompt
+   and does not want readline to do it the first time. */
+int rl_already_prompted = 0;
+
+/* The number of characters read in order to type this complete command. */
+int rl_key_sequence_length = 0;
+
+/* If non-zero, then this is the address of a function to call just
+   before readline_internal_setup () prints the first prompt. */
+rl_hook_func_t *rl_startup_hook = (rl_hook_func_t *)NULL;
+
+/* If non-zero, this is the address of a function to call just before
+   readline_internal_setup () returns and readline_internal starts
+   reading input characters. */
+rl_hook_func_t *rl_pre_input_hook = (rl_hook_func_t *)NULL;
+
+/* What we use internally.  You should always refer to RL_LINE_BUFFER. */
+static char *the_line;
+
+/* The character that can generate an EOF.  Really read from
+   the terminal driver... just defaulted here. */
+int _rl_eof_char = CTRL ('D');
+
+/* Non-zero makes this the next keystroke to read. */
+int rl_pending_input = 0;
+
+/* Pointer to a useful terminal name. */
+const char *rl_terminal_name = (const char *)NULL;
+
+/* Non-zero means to always use horizontal scrolling in line display. */
+int _rl_horizontal_scroll_mode = 0;
+
+/* Non-zero means to display an asterisk at the starts of history lines
+   which have been modified. */
+int _rl_mark_modified_lines = 0;  
+
+/* The style of `bell' notification preferred.  This can be set to NO_BELL,
+   AUDIBLE_BELL, or VISIBLE_BELL. */
+int _rl_bell_preference = AUDIBLE_BELL;
+     
+/* String inserted into the line by rl_insert_comment (). */
+char *_rl_comment_begin;
+
+/* Keymap holding the function currently being executed. */
+Keymap rl_executing_keymap;
+
+/* Keymap we're currently using to dispatch. */
+Keymap _rl_dispatching_keymap;
+
+/* Non-zero means to erase entire line, including prompt, on empty input lines. */
+int rl_erase_empty_line = 0;
+
+/* Non-zero means to read only this many characters rather than up to a
+   character bound to accept-line. */
+int rl_num_chars_to_read;
+
+/* Line buffer and maintenance. */
+char *rl_line_buffer = (char *)NULL;
+int rl_line_buffer_len = 0;
+
+/* Key sequence `contexts' */
+_rl_keyseq_cxt *_rl_kscxt = 0;
+
+int rl_executing_key;
+char *rl_executing_keyseq = 0;
+int _rl_executing_keyseq_size = 0;
+
+/* Timeout (specified in milliseconds) when reading characters making up an
+   ambiguous multiple-key sequence */
+int _rl_keyseq_timeout = 500;
+
+#define RESIZE_KEYSEQ_BUFFER() \
+  do \
+    { \
+      if (rl_key_sequence_length + 2 >= _rl_executing_keyseq_size) \
+        { \
+          _rl_executing_keyseq_size += 16; \
+          rl_executing_keyseq = xrealloc (rl_executing_keyseq, _rl_executing_keyseq_size); \
+        } \
+    } \
+  while (0);
+        
+/* Forward declarations used by the display, termcap, and history code. */
+
+/* **************************************************************** */
+/*                                                                  */
+/*                      `Forward' declarations                      */
+/*                                                                  */
+/* **************************************************************** */
+
+/* Non-zero means do not parse any lines other than comments and
+   parser directives. */
+unsigned char _rl_parsing_conditionalized_out = 0;
+
+/* Non-zero means to convert characters with the meta bit set to
+   escape-prefixed characters so we can indirect through
+   emacs_meta_keymap or vi_escape_keymap. */
+int _rl_convert_meta_chars_to_ascii = 1;
+
+/* Non-zero means to output characters with the meta bit set directly
+   rather than as a meta-prefixed escape sequence. */
+int _rl_output_meta_chars = 0;
+
+/* Non-zero means to look at the termios special characters and bind
+   them to equivalent readline functions at startup. */
+int _rl_bind_stty_chars = 1;
+
+/* Non-zero means to go through the history list at every newline (or
+   whenever rl_done is set and readline returns) and revert each line to
+   its initial state. */
+int _rl_revert_all_at_newline = 0;
+
+/* Non-zero means to honor the termios ECHOCTL bit and echo control
+   characters corresponding to keyboard-generated signals. */
+int _rl_echo_control_chars = 1;
+
+/* Non-zero means to prefix the displayed prompt with a character indicating
+   the editing mode: @ for emacs, : for vi-command, + for vi-insert. */
+int _rl_show_mode_in_prompt = 0;
+
+/* **************************************************************** */
+/*                                                                  */
+/*                      Top Level Functions                         */
+/*                                                                  */
+/* **************************************************************** */
+
+/* Non-zero means treat 0200 bit in terminal input as Meta bit. */
+int _rl_meta_flag = 0;  /* Forward declaration */
+
+/* Set up the prompt and expand it.  Called from readline() and
+   rl_callback_handler_install (). */
+int
+rl_set_prompt (prompt)
+     const char *prompt;
+{
+  FREE (rl_prompt);
+  rl_prompt = prompt ? savestring (prompt) : (char *)NULL;
+  rl_display_prompt = rl_prompt ? rl_prompt : "";
+
+  rl_visible_prompt_length = rl_expand_prompt (rl_prompt);
+  return 0;
+}
+  
+/* Read a line of input.  Prompt with PROMPT.  An empty PROMPT means
+   none.  A return value of NULL means that EOF was encountered. */
+char *
+readline (prompt)
+     const char *prompt;
+{
+  char *value;
+#if 0
+  int in_callback;
+#endif
+
+  /* If we are at EOF return a NULL string. */
+  if (rl_pending_input == EOF)
+    {
+      rl_clear_pending_input ();
+      return ((char *)NULL);
+    }
+
+#if 0
+  /* If readline() is called after installing a callback handler, temporarily
+     turn off the callback state to avoid ensuing messiness.  Patch supplied
+     by the gdb folks.  XXX -- disabled.  This can be fooled and readline
+     left in a strange state by a poorly-timed longjmp. */
+  if (in_callback = RL_ISSTATE (RL_STATE_CALLBACK))
+    RL_UNSETSTATE (RL_STATE_CALLBACK);
+#endif
+
+  rl_set_prompt (prompt);
+
+  rl_initialize ();
+  if (rl_prep_term_function)
+    (*rl_prep_term_function) (_rl_meta_flag);
+
+#if defined (HANDLE_SIGNALS)
+  rl_set_signals ();
+#endif
+
+  value = readline_internal ();
+  if (rl_deprep_term_function)
+    (*rl_deprep_term_function) ();
+
+#if defined (HANDLE_SIGNALS)
+  rl_clear_signals ();
+#endif
+
+#if 0
+  if (in_callback)
+    RL_SETSTATE (RL_STATE_CALLBACK);
+#endif
+
+#if HAVE_DECL_AUDIT_TTY && defined (ENABLE_TTY_AUDIT_SUPPORT)
+  if (value)
+    _rl_audit_tty (value);
+#endif
+
+  return (value);
+}
+
+#if defined (READLINE_CALLBACKS)
+#  define STATIC_CALLBACK
+#else
+#  define STATIC_CALLBACK static
+#endif
+
+STATIC_CALLBACK void
+readline_internal_setup ()
+{
+  char *nprompt;
+
+  _rl_in_stream = rl_instream;
+  _rl_out_stream = rl_outstream;
+
+  /* Enable the meta key only for the duration of readline(), if this
+     terminal has one and the terminal has been initialized */
+  if (_rl_enable_meta & RL_ISSTATE (RL_STATE_TERMPREPPED))
+    _rl_enable_meta_key ();
+
+  if (rl_startup_hook)
+    (*rl_startup_hook) ();
+
+#if defined (VI_MODE)
+  if (rl_editing_mode == vi_mode)
+    rl_vi_insertion_mode (1, 'i');      /* don't want to reset last */
+#endif /* VI_MODE */
+
+  /* If we're not echoing, we still want to at least print a prompt, because
+     rl_redisplay will not do it for us.  If the calling application has a
+     custom redisplay function, though, let that function handle it. */
+  if (_rl_echoing_p == 0 && rl_redisplay_function == rl_redisplay)
+    {
+      if (rl_prompt && rl_already_prompted == 0)
+        {
+          nprompt = _rl_strip_prompt (rl_prompt);
+          fprintf (_rl_out_stream, "%s", nprompt);
+          fflush (_rl_out_stream);
+          xfree (nprompt);
+        }
+    }
+  else
+    {
+      if (rl_prompt && rl_already_prompted)
+        rl_on_new_line_with_prompt ();
+      else
+        rl_on_new_line ();
+      (*rl_redisplay_function) ();
+    }
+
+  if (rl_pre_input_hook)
+    (*rl_pre_input_hook) ();
+
+  RL_CHECK_SIGNALS ();
+}
+
+STATIC_CALLBACK char *
+readline_internal_teardown (eof)
+     int eof;
+{
+  char *temp;
+  HIST_ENTRY *entry;
+
+  RL_CHECK_SIGNALS ();
+
+  /* Restore the original of this history line, iff the line that we
+     are editing was originally in the history, AND the line has changed. */
+  entry = current_history ();
+
+  if (entry && rl_undo_list)
+    {
+      temp = savestring (the_line);
+      rl_revert_line (1, 0);
+      entry = replace_history_entry (where_history (), the_line, (histdata_t)NULL);
+      _rl_free_history_entry (entry);
+
+      strcpy (the_line, temp);
+      xfree (temp);
+    }
+
+  if (_rl_revert_all_at_newline)
+    _rl_revert_all_lines ();
+
+  /* At any rate, it is highly likely that this line has an undo list.  Get
+     rid of it now. */
+  if (rl_undo_list)
+    rl_free_undo_list ();
+
+  /* Disable the meta key, if this terminal has one and we were told to use it.
+     The check whether or not we sent the enable string is in
+     _rl_disable_meta_key(); the flag is set in _rl_enable_meta_key */
+  _rl_disable_meta_key ();
+
+  /* Restore normal cursor, if available. */
+  _rl_set_insert_mode (RL_IM_INSERT, 0);
+
+  return (eof ? (char *)NULL : savestring (the_line));
+}
+
+void
+_rl_internal_char_cleanup ()
+{
+#if defined (VI_MODE)
+  /* In vi mode, when you exit insert mode, the cursor moves back
+     over the previous character.  We explicitly check for that here. */
+  if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap)
+    rl_vi_check ();
+#endif /* VI_MODE */
+
+  if (rl_num_chars_to_read && rl_end >= rl_num_chars_to_read)
+    {
+      (*rl_redisplay_function) ();
+      _rl_want_redisplay = 0;
+      rl_newline (1, '\n');
+    }
+
+  if (rl_done == 0)
+    {
+      (*rl_redisplay_function) ();
+      _rl_want_redisplay = 0;
+    }
+
+  /* If the application writer has told us to erase the entire line if
+     the only character typed was something bound to rl_newline, do so. */
+  if (rl_erase_empty_line && rl_done && rl_last_func == rl_newline &&
+      rl_point == 0 && rl_end == 0)
+    _rl_erase_entire_line ();
+}
+
+STATIC_CALLBACK int
+#if defined (READLINE_CALLBACKS)
+readline_internal_char ()
+#else
+readline_internal_charloop ()
+#endif
+{
+  static int lastc, eof_found;
+  int c, code, lk;
+
+  lastc = -1;
+  eof_found = 0;
+
+#if !defined (READLINE_CALLBACKS)
+  while (rl_done == 0)
+    {
+#endif
+      lk = _rl_last_command_was_kill;
+
+#if defined (HAVE_POSIX_SIGSETJMP)
+      code = sigsetjmp (_rl_top_level, 0);
+#else
+      code = setjmp (_rl_top_level);
+#endif
+
+      if (code)
+        {
+          (*rl_redisplay_function) ();
+          _rl_want_redisplay = 0;
+          /* If we get here, we're not being called from something dispatched
+             from _rl_callback_read_char(), which sets up its own value of
+             _rl_top_level (saving and restoring the old, of course), so
+             we can just return here. */
+          if (RL_ISSTATE (RL_STATE_CALLBACK))
+            return (0);
+        }
+
+      if (rl_pending_input == 0)
+        {
+          /* Then initialize the argument and number of keys read. */
+          _rl_reset_argument ();
+          rl_key_sequence_length = 0;
+          rl_executing_keyseq[0] = 0;
+        }
+
+      RL_SETSTATE(RL_STATE_READCMD);
+      c = rl_read_key ();
+      RL_UNSETSTATE(RL_STATE_READCMD);
+
+      /* look at input.c:rl_getc() for the circumstances under which this will
+         be returned; punt immediately on read error without converting it to
+         a newline; assume that rl_read_key has already called the signal
+         handler. */
+      if (c == READERR)
+        {
+#if defined (READLINE_CALLBACKS)
+          RL_SETSTATE(RL_STATE_DONE);
+          return (rl_done = 1);
+#else
+          eof_found = 1;
+          break;
+#endif
+        }
+
+      /* EOF typed to a non-blank line is a <NL>.  If we want to change this,
+         to force any existing line to be ignored when read(2) reads EOF,
+         for example, this is the place to change. */
+      if (c == EOF && rl_end)
+        c = NEWLINE;
+
+      /* The character _rl_eof_char typed to blank line, and not as the
+         previous character is interpreted as EOF. */
+      if (((c == _rl_eof_char && lastc != c) || c == EOF) && !rl_end)
+        {
+#if defined (READLINE_CALLBACKS)
+          RL_SETSTATE(RL_STATE_DONE);
+          return (rl_done = 1);
+#else
+          eof_found = 1;
+          break;
+#endif
+        }
+
+      lastc = c;
+      _rl_dispatch ((unsigned char)c, _rl_keymap);
+      RL_CHECK_SIGNALS ();
+
+      /* If there was no change in _rl_last_command_was_kill, then no kill
+         has taken place.  Note that if input is pending we are reading
+         a prefix command, so nothing has changed yet. */
+      if (rl_pending_input == 0 && lk == _rl_last_command_was_kill)
+        _rl_last_command_was_kill = 0;
+
+      _rl_internal_char_cleanup ();
+
+#if defined (READLINE_CALLBACKS)
+      return 0;
+#else
+    }
+
+  return (eof_found);
+#endif
+}
+
+#if defined (READLINE_CALLBACKS)
+static int
+readline_internal_charloop ()
+{
+  int eof = 1;
+
+  while (rl_done == 0)
+    eof = readline_internal_char ();
+  return (eof);
+}
+#endif /* READLINE_CALLBACKS */
+
+/* Read a line of input from the global rl_instream, doing output on
+   the global rl_outstream.
+   If rl_prompt is non-null, then that is our prompt. */
+static char *
+readline_internal ()
+{
+  int eof;
+
+  readline_internal_setup ();
+  eof = readline_internal_charloop ();
+  return (readline_internal_teardown (eof));
+}
+
+void
+_rl_init_line_state ()
+{
+  rl_point = rl_end = rl_mark = 0;
+  the_line = rl_line_buffer;
+  the_line[0] = 0;
+}
+
+void
+_rl_set_the_line ()
+{
+  the_line = rl_line_buffer;
+}
+
+#if defined (READLINE_CALLBACKS)
+_rl_keyseq_cxt *
+_rl_keyseq_cxt_alloc ()
+{
+  _rl_keyseq_cxt *cxt;
+
+  cxt = (_rl_keyseq_cxt *)xmalloc (sizeof (_rl_keyseq_cxt));
+
+  cxt->flags = cxt->subseq_arg = cxt->subseq_retval = 0;
+
+  cxt->okey = 0;
+  cxt->ocxt = _rl_kscxt;
+  cxt->childval = 42;           /* sentinel value */
+
+  return cxt;
+}
+
+void
+_rl_keyseq_cxt_dispose (cxt)
+    _rl_keyseq_cxt *cxt;
+{
+  xfree (cxt);
+}
+
+void
+_rl_keyseq_chain_dispose ()
+{
+  _rl_keyseq_cxt *cxt;
+
+  while (_rl_kscxt)
+    {
+      cxt = _rl_kscxt;
+      _rl_kscxt = _rl_kscxt->ocxt;
+      _rl_keyseq_cxt_dispose (cxt);
+    }
+}
+#endif
+
+static int
+_rl_subseq_getchar (key)
+     int key;
+{
+  int k;
+
+  if (key == ESC)
+    RL_SETSTATE(RL_STATE_METANEXT);
+  RL_SETSTATE(RL_STATE_MOREINPUT);
+  k = rl_read_key ();
+  RL_UNSETSTATE(RL_STATE_MOREINPUT);
+  if (key == ESC)
+    RL_UNSETSTATE(RL_STATE_METANEXT);
+
+  return k;
+}
+
+#if defined (READLINE_CALLBACKS)
+int
+_rl_dispatch_callback (cxt)
+     _rl_keyseq_cxt *cxt;
+{
+  int nkey, r;
+
+  /* For now */
+  /* The first time this context is used, we want to read input and dispatch
+     on it.  When traversing the chain of contexts back `up', we want to use
+     the value from the next context down.  We're simulating recursion using
+     a chain of contexts. */
+  if ((cxt->flags & KSEQ_DISPATCHED) == 0)
+    {
+      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;
+    }
+  else
+    r = cxt->childval;
+
+  /* For now */
+  if (r != -3)  /* don't do this if we indicate there will be other matches */
+    r = _rl_subseq_result (r, cxt->oldmap, cxt->okey, (cxt->flags & KSEQ_SUBSEQ));
+
+  RL_CHECK_SIGNALS ();
+  /* We only treat values < 0 specially to simulate recursion. */
+  if (r >= 0 || (r == -1 && (cxt->flags & KSEQ_SUBSEQ) == 0))   /* success! or failure! */
+    {
+      _rl_keyseq_chain_dispose ();
+      RL_UNSETSTATE (RL_STATE_MULTIKEY);
+      return r;
+    }
+
+  if (r != -3)                  /* magic value that says we added to the chain */
+    _rl_kscxt = cxt->ocxt;
+  if (_rl_kscxt)
+    _rl_kscxt->childval = r;
+  if (r != -3)
+    _rl_keyseq_cxt_dispose (cxt);
+
+  return r;
+}
+#endif /* READLINE_CALLBACKS */
+  
+/* Do the command associated with KEY in MAP.
+   If the associated command is really a keymap, then read
+   another key, and dispatch into that map. */
+int
+_rl_dispatch (key, map)
+     register int key;
+     Keymap map;
+{
+  _rl_dispatching_keymap = map;
+  return _rl_dispatch_subseq (key, map, 0);
+}
+
+int
+_rl_dispatch_subseq (key, map, got_subseq)
+     register int key;
+     Keymap map;
+     int got_subseq;
+{
+  int r, newkey;
+  char *macro;
+  rl_command_func_t *func;
+#if defined (READLINE_CALLBACKS)
+  _rl_keyseq_cxt *cxt;
+#endif
+
+  if (META_CHAR (key) && _rl_convert_meta_chars_to_ascii)
+    {
+      if (map[ESC].type == ISKMAP)
+        {
+          if (RL_ISSTATE (RL_STATE_MACRODEF))
+            _rl_add_macro_char (ESC);
+          RESIZE_KEYSEQ_BUFFER ();
+          rl_executing_keyseq[rl_key_sequence_length++] = ESC;
+          map = FUNCTION_TO_KEYMAP (map, ESC);
+          key = UNMETA (key);
+          return (_rl_dispatch (key, map));
+        }
+      else
+        rl_ding ();
+      return 0;
+    }
+
+  if (RL_ISSTATE (RL_STATE_MACRODEF))
+    _rl_add_macro_char (key);
+
+  r = 0;
+  switch (map[key].type)
+    {
+    case ISFUNC:
+      func = map[key].function;
+      if (func)
+        {
+          /* Special case rl_do_lowercase_version (). */
+          if (func == rl_do_lowercase_version)
+            /* Should we do anything special if key == ANYOTHERKEY? */
+            return (_rl_dispatch (_rl_to_lower (key), map));
+
+          rl_executing_keymap = map;
+          rl_executing_key = key;
+
+          RESIZE_KEYSEQ_BUFFER();
+          rl_executing_keyseq[rl_key_sequence_length++] = key;
+          rl_executing_keyseq[rl_key_sequence_length] = '\0';
+
+          rl_dispatching = 1;
+          RL_SETSTATE(RL_STATE_DISPATCHING);
+          r = (*func) (rl_numeric_arg * rl_arg_sign, key);
+          RL_UNSETSTATE(RL_STATE_DISPATCHING);
+          rl_dispatching = 0;
+
+          /* If we have input pending, then the last command was a prefix
+             command.  Don't change the state of rl_last_func.  Otherwise,
+             remember the last command executed in this variable. */
+          if (rl_pending_input == 0 && map[key].function != rl_digit_argument)
+            rl_last_func = map[key].function;
+
+          RL_CHECK_SIGNALS ();
+        }
+      else if (map[ANYOTHERKEY].function)
+        {
+          /* OK, there's no function bound in this map, but there is a
+             shadow function that was overridden when the current keymap
+             was created.  Return -2 to note  that. */
+          if (RL_ISSTATE (RL_STATE_MACROINPUT))
+            _rl_prev_macro_key ();
+          else
+            _rl_unget_char  (key);
+          return -2;
+        }
+      else if (got_subseq)
+        {
+          /* Return -1 to note that we're in a subsequence, but  we don't
+             have a matching key, nor was one overridden.  This means
+             we need to back up the recursion chain and find the last
+             subsequence that is bound to a function. */
+          if (RL_ISSTATE (RL_STATE_MACROINPUT))
+            _rl_prev_macro_key ();
+          else
+            _rl_unget_char (key);
+          return -1;
+        }
+      else
+        {
+#if defined (READLINE_CALLBACKS)
+          RL_UNSETSTATE (RL_STATE_MULTIKEY);
+          _rl_keyseq_chain_dispose ();
+#endif
+          _rl_abort_internal ();
+          return -1;
+        }
+      break;
+
+    case ISKMAP:
+      if (map[key].function != 0)
+        {
+#if defined (VI_MODE)
+          /* The only way this test will be true is if a subsequence has been
+             bound starting with ESC, generally the arrow keys.  What we do is
+             check whether there's input in the queue, which there generally
+             will be if an arrow key has been pressed, and, if there's not,
+             just dispatch to (what we assume is) rl_vi_movement_mode right
+             away.  This is essentially an input test with a zero timeout (by
+             default) or a timeout determined by the value of `keyseq-timeout' */
+          /* _rl_keyseq_timeout specified in milliseconds; _rl_input_queued
+             takes microseconds, so multiply by 1000 */
+          if (rl_editing_mode == vi_mode && key == ESC && map == vi_insertion_keymap
+              && _rl_input_queued ((_rl_keyseq_timeout > 0) ? _rl_keyseq_timeout*1000 : 0) == 0)
+            return (_rl_dispatch (ANYOTHERKEY, FUNCTION_TO_KEYMAP (map, key)));
+#endif
+
+          RESIZE_KEYSEQ_BUFFER ();
+          rl_executing_keyseq[rl_key_sequence_length++] = key;
+          _rl_dispatching_keymap = FUNCTION_TO_KEYMAP (map, key);
+
+          /* Allocate new context here.  Use linked contexts (linked through
+             cxt->ocxt) to simulate recursion */
+#if defined (READLINE_CALLBACKS)
+          if (RL_ISSTATE (RL_STATE_CALLBACK))
+            {
+              /* Return 0 only the first time, to indicate success to
+                 _rl_callback_read_char.  The rest of the time, we're called
+                 from _rl_dispatch_callback, so we return -3 to indicate
+                 special handling is necessary. */
+              r = RL_ISSTATE (RL_STATE_MULTIKEY) ? -3 : 0;
+              cxt = _rl_keyseq_cxt_alloc ();
+
+              if (got_subseq)
+                cxt->flags |= KSEQ_SUBSEQ;
+              cxt->okey = key;
+              cxt->oldmap = map;
+              cxt->dmap = _rl_dispatching_keymap;
+              cxt->subseq_arg = got_subseq || cxt->dmap[ANYOTHERKEY].function;
+
+              RL_SETSTATE (RL_STATE_MULTIKEY);
+              _rl_kscxt = cxt;
+
+              return r;         /* don't indicate immediate success */
+            }
+#endif
+
+          /* Tentative inter-character timeout for potential multi-key
+             sequences?  If no input within timeout, abort sequence and
+             act as if we got non-matching input. */
+          /* _rl_keyseq_timeout specified in milliseconds; _rl_input_queued
+             takes microseconds, so multiply by 1000 */
+          if (_rl_keyseq_timeout > 0 &&
+                (RL_ISSTATE (RL_STATE_INPUTPENDING|RL_STATE_MACROINPUT) == 0) &&
+                _rl_pushed_input_available () == 0 &&
+                _rl_dispatching_keymap[ANYOTHERKEY].function &&
+                _rl_input_queued (_rl_keyseq_timeout*1000) == 0)
+            return (_rl_subseq_result (-2, map, key, got_subseq));
+
+          newkey = _rl_subseq_getchar (key);
+          if (newkey < 0)
+            {
+              _rl_abort_internal ();
+              return -1;
+            }
+
+          r = _rl_dispatch_subseq (newkey, _rl_dispatching_keymap, got_subseq || map[ANYOTHERKEY].function);
+          return _rl_subseq_result (r, map, key, got_subseq);
+        }
+      else
+        {
+          _rl_abort_internal ();
+          return -1;
+        }
+      break;
+
+    case ISMACR:
+      if (map[key].function != 0)
+        {
+          rl_executing_keyseq[rl_key_sequence_length] = '\0';
+          macro = savestring ((char *)map[key].function);
+          _rl_with_macro_input (macro);
+          return 0;
+        }
+      break;
+    }
+#if defined (VI_MODE)
+  if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap &&
+      key != ANYOTHERKEY &&
+      rl_key_sequence_length == 1 &&    /* XXX */
+      _rl_vi_textmod_command (key))
+    _rl_vi_set_last (key, rl_numeric_arg, rl_arg_sign);
+#endif
+
+  return (r);
+}
+
+static int
+_rl_subseq_result (r, map, key, got_subseq)
+     int r;
+     Keymap map;
+     int key, got_subseq;
+{
+  Keymap m;
+  int type, nt;
+  rl_command_func_t *func, *nf;
+
+  if (r == -2)
+    /* We didn't match anything, and the keymap we're indexed into
+       shadowed a function previously bound to that prefix.  Call
+       the function.  The recursive call to _rl_dispatch_subseq has
+       already taken care of pushing any necessary input back onto
+       the input queue with _rl_unget_char. */
+    {
+      m = _rl_dispatching_keymap;
+      type = m[ANYOTHERKEY].type;
+      func = m[ANYOTHERKEY].function;
+      if (type == ISFUNC && func == rl_do_lowercase_version)
+        r = _rl_dispatch (_rl_to_lower (key), map);
+      else if (type == ISFUNC && func == rl_insert)
+        {
+          /* If the function that was shadowed was self-insert, we
+             somehow need a keymap with map[key].func == self-insert.
+             Let's use this one. */
+          nt = m[key].type;
+          nf = m[key].function;
+
+          m[key].type = type;
+          m[key].function = func;
+          r = _rl_dispatch (key, m);
+          m[key].type = nt;
+          m[key].function = nf;
+        }
+      else
+        r = _rl_dispatch (ANYOTHERKEY, m);
+    }
+  else if (r && map[ANYOTHERKEY].function)
+    {
+      /* We didn't match (r is probably -1), so return something to
+         tell the caller that it should try ANYOTHERKEY for an
+         overridden function. */
+      if (RL_ISSTATE (RL_STATE_MACROINPUT))
+        _rl_prev_macro_key ();
+      else
+        _rl_unget_char (key);
+      _rl_dispatching_keymap = map;
+      return -2;
+    }
+  else if (r && got_subseq)
+    {
+      /* OK, back up the chain. */
+      if (RL_ISSTATE (RL_STATE_MACROINPUT))
+        _rl_prev_macro_key ();
+      else
+        _rl_unget_char (key);
+      _rl_dispatching_keymap = map;
+      return -1;
+    }
+
+  return r;
+}
+
+/* **************************************************************** */
+/*                                                                  */
+/*                      Initializations                             */
+/*                                                                  */
+/* **************************************************************** */
+
+/* Initialize readline (and terminal if not already). */
+int
+rl_initialize ()
+{
+  /* If we have never been called before, initialize the
+     terminal and data structures. */
+  if (!rl_initialized)
+    {
+      RL_SETSTATE(RL_STATE_INITIALIZING);
+      readline_initialize_everything ();
+      RL_UNSETSTATE(RL_STATE_INITIALIZING);
+      rl_initialized++;
+      RL_SETSTATE(RL_STATE_INITIALIZED);
+    }
+
+  /* Initialize the current line information. */
+  _rl_init_line_state ();
+
+  /* We aren't done yet.  We haven't even gotten started yet! */
+  rl_done = 0;
+  RL_UNSETSTATE(RL_STATE_DONE);
+
+  /* Tell the history routines what is going on. */
+  _rl_start_using_history ();
+
+  /* Make the display buffer match the state of the line. */
+  rl_reset_line_state ();
+
+  /* No such function typed yet. */
+  rl_last_func = (rl_command_func_t *)NULL;
+
+  /* Parsing of key-bindings begins in an enabled state. */
+  _rl_parsing_conditionalized_out = 0;
+
+#if defined (VI_MODE)
+  if (rl_editing_mode == vi_mode)
+    _rl_vi_initialize_line ();
+#endif
+
+  /* Each line starts in insert mode (the default). */
+  _rl_set_insert_mode (RL_IM_DEFAULT, 1);
+
+  return 0;
+}
+
+#if 0
+#if defined (__EMX__)
+static void
+_emx_build_environ ()
+{
+  TIB *tibp;
+  PIB *pibp;
+  char *t, **tp;
+  int c;
+
+  DosGetInfoBlocks (&tibp, &pibp);
+  t = pibp->pib_pchenv;
+  for (c = 1; *t; c++)
+    t += strlen (t) + 1;
+  tp = environ = (char **)xmalloc ((c + 1) * sizeof (char *));
+  t = pibp->pib_pchenv;
+  while (*t)
+    {
+      *tp++ = t;
+      t += strlen (t) + 1;
+    }
+  *tp = 0;
+}
+#endif /* __EMX__ */
+#endif
+
+/* Initialize the entire state of the world. */
+static void
+readline_initialize_everything ()
+{
+#if 0
+#if defined (__EMX__)
+  if (environ == 0)
+    _emx_build_environ ();
+#endif
+#endif
+
+#if 0
+  /* Find out if we are running in Emacs -- UNUSED. */
+  running_in_emacs = sh_get_env_value ("EMACS") != (char *)0;
+#endif
+
+  /* Set up input and output if they are not already set up. */
+  if (!rl_instream)
+    rl_instream = stdin;
+
+  if (!rl_outstream)
+    rl_outstream = stdout;
+
+  /* Bind _rl_in_stream and _rl_out_stream immediately.  These values
+     may change, but they may also be used before readline_internal ()
+     is called. */
+  _rl_in_stream = rl_instream;
+  _rl_out_stream = rl_outstream;
+
+  /* Allocate data structures. */
+  if (rl_line_buffer == 0)
+    rl_line_buffer = (char *)xmalloc (rl_line_buffer_len = DEFAULT_BUFFER_SIZE);
+
+  /* Initialize the terminal interface. */
+  if (rl_terminal_name == 0)
+    rl_terminal_name = sh_get_env_value ("TERM");
+  _rl_init_terminal_io (rl_terminal_name);
+
+  /* Bind tty characters to readline functions. */
+  readline_default_bindings ();
+
+  /* Initialize the function names. */
+  rl_initialize_funmap ();
+
+  /* Decide whether we should automatically go into eight-bit mode. */
+  _rl_init_eightbit ();
+      
+  /* Read in the init file. */
+  rl_read_init_file ((char *)NULL);
+
+  /* XXX */
+  if (_rl_horizontal_scroll_mode && _rl_term_autowrap)
+    {
+      _rl_screenwidth--;
+      _rl_screenchars -= _rl_screenheight;
+    }
+
+  /* Override the effect of any `set keymap' assignments in the
+     inputrc file. */
+  rl_set_keymap_from_edit_mode ();
+
+  /* Try to bind a common arrow key prefix, if not already bound. */
+  bind_arrow_keys ();
+
+  /* If the completion parser's default word break characters haven't
+     been set yet, then do so now. */
+  if (rl_completer_word_break_characters == (char *)NULL)
+    rl_completer_word_break_characters = (char *)rl_basic_word_break_characters;
+
+#if defined (COLOR_SUPPORT)
+  if (_rl_colored_stats)
+    _rl_parse_colors ();
+#endif
+
+  rl_executing_keyseq = malloc (_rl_executing_keyseq_size = 16);
+  if (rl_executing_keyseq)
+    rl_executing_keyseq[0] = '\0';
+}
+
+/* If this system allows us to look at the values of the regular
+   input editing characters, then bind them to their readline
+   equivalents, iff the characters are not bound to keymaps. */
+static void
+readline_default_bindings ()
+{
+  if (_rl_bind_stty_chars)
+    rl_tty_set_default_bindings (_rl_keymap);
+}
+
+/* Reset the default bindings for the terminal special characters we're
+   interested in back to rl_insert and read the new ones. */
+static void
+reset_default_bindings ()
+{
+  if (_rl_bind_stty_chars)
+    {
+      rl_tty_unset_default_bindings (_rl_keymap);
+      rl_tty_set_default_bindings (_rl_keymap);
+    }
+}
+
+/* Bind some common arrow key sequences in MAP. */
+static void
+bind_arrow_keys_internal (map)
+     Keymap map;
+{
+  Keymap xkeymap;
+
+  xkeymap = _rl_keymap;
+  _rl_keymap = map;
+
+#if defined (__MSDOS__)
+  rl_bind_keyseq_if_unbound ("\033[0A", rl_get_previous_history);
+  rl_bind_keyseq_if_unbound ("\033[0B", rl_backward_char);
+  rl_bind_keyseq_if_unbound ("\033[0C", rl_forward_char);
+  rl_bind_keyseq_if_unbound ("\033[0D", rl_get_next_history);
+#endif
+
+  rl_bind_keyseq_if_unbound ("\033[A", rl_get_previous_history);
+  rl_bind_keyseq_if_unbound ("\033[B", rl_get_next_history);
+  rl_bind_keyseq_if_unbound ("\033[C", rl_forward_char);
+  rl_bind_keyseq_if_unbound ("\033[D", rl_backward_char);
+  rl_bind_keyseq_if_unbound ("\033[H", rl_beg_of_line);
+  rl_bind_keyseq_if_unbound ("\033[F", rl_end_of_line);
+
+  rl_bind_keyseq_if_unbound ("\033OA", rl_get_previous_history);
+  rl_bind_keyseq_if_unbound ("\033OB", rl_get_next_history);
+  rl_bind_keyseq_if_unbound ("\033OC", rl_forward_char);
+  rl_bind_keyseq_if_unbound ("\033OD", rl_backward_char);
+  rl_bind_keyseq_if_unbound ("\033OH", rl_beg_of_line);
+  rl_bind_keyseq_if_unbound ("\033OF", rl_end_of_line);
+
+#if defined (__MINGW32__)
+  rl_bind_keyseq_if_unbound ("\340H", rl_get_previous_history);
+  rl_bind_keyseq_if_unbound ("\340P", rl_get_next_history);
+  rl_bind_keyseq_if_unbound ("\340M", rl_forward_char);
+  rl_bind_keyseq_if_unbound ("\340K", rl_backward_char);
+  rl_bind_keyseq_if_unbound ("\340G", rl_beg_of_line);
+  rl_bind_keyseq_if_unbound ("\340O", rl_end_of_line);
+  rl_bind_keyseq_if_unbound ("\340S", rl_delete);
+  rl_bind_keyseq_if_unbound ("\340R", rl_overwrite_mode);
+
+  /* These may or may not work because of the embedded NUL. */
+  rl_bind_keyseq_if_unbound ("\\000H", rl_get_previous_history);
+  rl_bind_keyseq_if_unbound ("\\000P", rl_get_next_history);
+  rl_bind_keyseq_if_unbound ("\\000M", rl_forward_char);
+  rl_bind_keyseq_if_unbound ("\\000K", rl_backward_char);
+  rl_bind_keyseq_if_unbound ("\\000G", rl_beg_of_line);
+  rl_bind_keyseq_if_unbound ("\\000O", rl_end_of_line);
+  rl_bind_keyseq_if_unbound ("\\000S", rl_delete);
+  rl_bind_keyseq_if_unbound ("\\000R", rl_overwrite_mode);
+#endif
+
+  _rl_keymap = xkeymap;
+}
+
+/* Try and bind the common arrow key prefixes after giving termcap and
+   the inputrc file a chance to bind them and create `real' keymaps
+   for the arrow key prefix. */
+static void
+bind_arrow_keys ()
+{
+  bind_arrow_keys_internal (emacs_standard_keymap);
+
+#if defined (VI_MODE)
+  bind_arrow_keys_internal (vi_movement_keymap);
+  /* Unbind vi_movement_keymap[ESC] to allow users to repeatedly hit ESC
+     in vi command mode while still allowing the arrow keys to work. */
+  if (vi_movement_keymap[ESC].type == ISKMAP)
+    rl_bind_keyseq_in_map ("\033", (rl_command_func_t *)NULL, vi_movement_keymap);
+  bind_arrow_keys_internal (vi_insertion_keymap);
+#endif
+}
+
+/* **************************************************************** */
+/*                                                                  */
+/*              Saving and Restoring Readline's state               */
+/*                                                                  */
+/* **************************************************************** */
+
+int
+rl_save_state (sp)
+     struct readline_state *sp;
+{
+  if (sp == 0)
+    return -1;
+
+  sp->point = rl_point;
+  sp->end = rl_end;
+  sp->mark = rl_mark;
+  sp->buffer = rl_line_buffer;
+  sp->buflen = rl_line_buffer_len;
+  sp->ul = rl_undo_list;
+  sp->prompt = rl_prompt;
+
+  sp->rlstate = rl_readline_state;
+  sp->done = rl_done;
+  sp->kmap = _rl_keymap;
+
+  sp->lastfunc = rl_last_func;
+  sp->insmode = rl_insert_mode;
+  sp->edmode = rl_editing_mode;
+  sp->kseqlen = rl_key_sequence_length;
+  sp->inf = rl_instream;
+  sp->outf = rl_outstream;
+  sp->pendingin = rl_pending_input;
+  sp->macro = rl_executing_macro;
+
+  sp->catchsigs = rl_catch_signals;
+  sp->catchsigwinch = rl_catch_sigwinch;
+
+  return (0);
+}
+
+int
+rl_restore_state (sp)
+     struct readline_state *sp;
+{
+  if (sp == 0)
+    return -1;
+
+  rl_point = sp->point;
+  rl_end = sp->end;
+  rl_mark = sp->mark;
+  the_line = rl_line_buffer = sp->buffer;
+  rl_line_buffer_len = sp->buflen;
+  rl_undo_list = sp->ul;
+  rl_prompt = sp->prompt;
+
+  rl_readline_state = sp->rlstate;
+  rl_done = sp->done;
+  _rl_keymap = sp->kmap;
+
+  rl_last_func = sp->lastfunc;
+  rl_insert_mode = sp->insmode;
+  rl_editing_mode = sp->edmode;
+  rl_key_sequence_length = sp->kseqlen;
+  rl_instream = sp->inf;
+  rl_outstream = sp->outf;
+  rl_pending_input = sp->pendingin;
+  rl_executing_macro = sp->macro;
+
+  rl_catch_signals = sp->catchsigs;
+  rl_catch_sigwinch = sp->catchsigwinch;
+
+  return (0);
+}

lib/sh/shquote.c

@@ -311 +311 @@
 
   return (0);
 }
+
+int
+sh_contains_quotes (string)
+     char *string;
+{
+  char *s;
+
+  for (s = string; s && *s; s++)
+    {
+      if (*s == '\'' || *s == '"' || *s == '\\')
+        return 1;
+    }
+  return 0;
+}

parse.y

@@ -2424 +2424 @@
          not already end in an EOF character.  */
       if (shell_input_line_terminator != EOF)
         {
-          if (shell_input_line_size < SIZE_MAX && shell_input_line_len > shell_input_line_size - 3)
+          if (shell_input_line_size < SIZE_MAX-3 && (shell_input_line_len+3 > shell_input_line_size))
             shell_input_line = (char *)xrealloc (shell_input_line,
                                         1 + (shell_input_line_size += 2));
 
@@ -2642 +2642 @@
   int r;
 
   r = 0;
-  while (need_here_doc)
+  while (need_here_doc > 0)
     {
       parser_state |= PST_HEREDOC;
       make_here_document (redir_stack[r++], line_number);
@@ -2953 +2953 @@
   FREE (word_desc_to_read);
   word_desc_to_read = (WORD_DESC *)NULL;
 
+  eol_ungetc_lookahead = 0;
+
   current_token = '\n';         /* XXX */
   last_read_token = '\n';
   token_to_read = '\n';
@@ -3398 +3400 @@
          within a double-quoted ${...} construct "an even number of
          unescaped double-quotes or single-quotes, if any, shall occur." */
       /* This was changed in Austin Group Interp 221 */
-      if MBTEST(posixly_correct && shell_compatibility_level > 41 && dolbrace_state != DOLBRACE_QUOTE && (flags & P_DQUOTE) && (flags & P_DOLBRACE) && ch == '\'')
+      if MBTEST(posixly_correct && shell_compatibility_level > 41 && dolbrace_state != DOLBRACE_QUOTE && dolbrace_state != DOLBRACE_QUOTE2 && (flags & P_DQUOTE) && (flags & P_DOLBRACE) && ch == '\'')
         continue;
 
       /* Could also check open == '`' if we want to parse grouping constructs
@@ -6075 +6077 @@
 
   ps->expand_aliases = expand_aliases;
   ps->echo_input_at_read = echo_input_at_read;
+  ps->need_here_doc = need_here_doc;
 
   ps->token = token;
   ps->token_buffer_size = token_buffer_size;
@@ -6123 +6126 @@
 
   expand_aliases = ps->expand_aliases;
   echo_input_at_read = ps->echo_input_at_read;
+  need_here_doc = ps->need_here_doc;
 
   FREE (token);
   token = ps->token;

patchlevel.h

@@ -25 +25 @@
    regexp `^#define[    ]*PATCHLEVEL', since that's what support/mkversion.sh
    looks for to find the patch level (for the sccs version string). */
 
-#define PATCHLEVEL 0
+#define PATCHLEVEL 26
 
 #endif /* _PATCHLEVEL_H_ */

pcomplete.c

@@ -183 +183 @@
 
 COMPSPEC *pcomp_curcs;
 const char *pcomp_curcmd;
+const char *pcomp_curtxt;
 
 #ifdef DEBUG
 /* Debugging code */
@@ -753 +754 @@
              quoted strings. */
           dfn = (*rl_filename_dequoting_function) ((char *)text, rl_completion_quote_character);
         }
+      /* Intended to solve a mismatched assumption by bash-completion.  If
+         the text to be completed is empty, but bash-completion turns it into
+         a quoted string ('') assuming that this code will dequote it before
+         calling readline, do the dequoting. */
+      else if (iscompgen && iscompleting &&
+               pcomp_curtxt && *pcomp_curtxt == 0 &&
+               text && (*text == '\'' || *text == '"') && text[1] == text[0] && text[2] == 0 && 
+               rl_filename_dequoting_function)
+        dfn = (*rl_filename_dequoting_function) ((char *)text, rl_completion_quote_character);
+      /* Another mismatched assumption by bash-completion.  If compgen is being
+         run as part of bash-completion, and the argument to compgen is not
+         the same as the word originally passed to the programmable completion
+         code, dequote the argument if it has quote characters.  It's an
+         attempt to detect when bash-completion is quoting its filename
+         argument before calling compgen. */
+      /* We could check whether gen_shell_function_matches is in the call
+         stack by checking whether the gen-shell-function-matches tag is in
+         the unwind-protect stack, but there's no function to do that yet.
+         We could simply check whether we're executing in a function by
+         checking variable_context, and may end up doing that. */
+      else if (iscompgen && iscompleting && rl_filename_dequoting_function &&
+               pcomp_curtxt && text &&
+               STREQ (pcomp_curtxt, text) == 0 &&
+               variable_context &&
+               sh_contains_quotes (text))       /* guess */
+        dfn = (*rl_filename_dequoting_function) ((char *)text, rl_completion_quote_character);
       else
         dfn = savestring (text);
     }
@@ -1522 +1549 @@
      COMPSPEC **lastcs;
 {
   COMPSPEC *cs, *oldcs;
-  const char *oldcmd;
+  const char *oldcmd, *oldtxt;
   STRINGLIST *ret;
 
   cs = progcomp_search (ocmd);
@@ -1545 +1572 @@
 
   oldcs = pcomp_curcs;
   oldcmd = pcomp_curcmd;
+  oldtxt = pcomp_curtxt;
 
   pcomp_curcs = cs;
   pcomp_curcmd = cmd;
+  pcomp_curtxt = word;
 
   ret = gen_compspec_completions (cs, cmd, word, start, end, foundp);
 
   pcomp_curcs = oldcs;
   pcomp_curcmd = oldcmd;
+  pcomp_curtxt = oldtxt;
 
   /* We need to conditionally handle setting *retryp here */
   if (retryp)

shell.h

@@ -168 +168 @@
   /* flags state affecting the parser */
   int expand_aliases;
   int echo_input_at_read;
-  
+  int need_here_doc;
+
 } sh_parser_state_t;
 
 typedef struct _sh_input_line_state_t {

subst.c

@@ -1192 +1192 @@
    Start extracting at (SINDEX) as if we had just seen "<(".
    Make (SINDEX) get the position of the matching ")". */ /*))*/
 char *
-extract_process_subst (string, starter, sindex)
+extract_process_subst (string, starter, sindex, xflags)
      char *string;
      char *starter;
      int *sindex;
+     int xflags;
 {
+#if 0
   return (extract_delimited_string (string, sindex, starter, "(", ")", SX_COMMAND));
+#else
+  xflags |= (no_longjmp_on_fatal_error ? SX_NOLONGJMP : 0);
+  return (xparse_dolparen (string, string+*sindex, sindex, xflags));
+#endif
 }
 #endif /* PROCESS_SUBSTITUTION */
 
@@ -1785 +1791 @@
           si = i + 2;
           if (string[si] == '\0')
             CQ_RETURN(si);
-          temp = extract_process_subst (string, (c == '<') ? "<(" : ">(", &si);
+          temp = extract_process_subst (string, (c == '<') ? "<(" : ">(", &si, 0);
           free (temp);          /* no SX_ALLOC here */
           i = si;
           if (string[i] == '\0')
@@ -3248 +3254 @@
   if (w->word == 0 || w->word[0] == '\0')
     return ((char *)NULL);
 
+  expand_no_split_dollar_star = 1;
   w->flags |= W_NOSPLIT2;
   l = call_expand_word_internal (w, 0, 0, (int *)0, (int *)0);
+  expand_no_split_dollar_star = 0;
   if (l)
     {
       if (special == 0)                 /* LHS */
@@ -7366 +7374 @@
     }
 
   if (want_indir)
-    tdesc = parameter_brace_expand_indir (name + 1, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at);
+    {
+      tdesc = parameter_brace_expand_indir (name + 1, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at);
+      /* Turn off the W_ARRAYIND flag because there is no way for this function
+         to return the index we're supposed to be using. */
+      if (tdesc && tdesc->flags)
+        tdesc->flags &= ~W_ARRAYIND;
+    }
   else
     tdesc = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND|(pflags&(PF_NOSPLIT2|PF_ASSIGNRHS)), &ind);
 
@@ -7847 +7861 @@
          We also want to make sure that splitting is done no matter what --
          according to POSIX.2, this expands to a list of the positional
          parameters no matter what IFS is set to. */
+      /* XXX - what to do when in a context where word splitting is not
+         performed? Even when IFS is not the default, posix seems to imply
+         that we behave like unquoted $* ?  Maybe we should use PF_NOSPLIT2
+         here. */
       temp = string_list_dollar_at (list, (pflags & PF_ASSIGNRHS) ? (quoted|Q_DOUBLE_QUOTES) : quoted);
 
       tflag |= W_DOLLARAT;
@@ -8029 +8047 @@
 
           goto return0;
         }
-      else if (var = find_variable_last_nameref (temp1))
+      else if (var && (invisible_p (var) || var_isset (var) == 0))
+        temp = (char *)NULL;
+      else if ((var = find_variable_last_nameref (temp1)) && var_isset (var) && invisible_p (var) == 0)
         {
           temp = nameref_cell (var);
 #if defined (ARRAY_VARS)
@@ -8243 +8263 @@
             else
               t_index = sindex + 1; /* skip past both '<' and LPAREN */
 
-            temp1 = extract_process_subst (string, (c == '<') ? "<(" : ">(", &t_index); /*))*/
+            temp1 = extract_process_subst (string, (c == '<') ? "<(" : ">(", &t_index, 0); /*))*/
             sindex = t_index;
 
             /* If the process substitution specification is `<()', we want to
@@ -8816 +8836 @@
   else
     {
       char *ifs_chars;
+      char *tstring;
 
       ifs_chars = (quoted_dollar_at || has_dollar_at) ? ifs_value : (char *)NULL;
 
@@ -8830 +8851 @@
          regardless of what else has happened to IFS since the expansion. */
       if (split_on_spaces)
         list = list_string (istring, " ", 1);   /* XXX quoted == 1? */
+      /* If we have $@ (has_dollar_at != 0) and we are in a context where we
+         don't want to split the result (W_NOSPLIT2), and we are not quoted,
+         we have already separated the arguments with the first character of
+         $IFS.  In this case, we want to return a list with a single word
+         with the separator possibly replaced with a space (it's what other
+         shells seem to do).
+         quoted_dollar_at is internal to this function and is set if we are
+         passed an argument that is unquoted (quoted == 0) but we encounter a
+         double-quoted $@ while expanding it. */
+      else if (has_dollar_at && quoted_dollar_at == 0 && ifs_chars && quoted == 0 && (word->flags & W_NOSPLIT2))
+        {
+          /* Only split and rejoin if we have to */
+          if (*ifs_chars && *ifs_chars != ' ')
+            {
+              list = list_string (istring, *ifs_chars ? ifs_chars : " ", 1);
+              tstring = string_list (list);
+            }
+          else
+            tstring = istring;
+          tword = make_bare_word (tstring);
+          if (tstring != istring)
+            free (tstring);
+          goto set_word_flags;
+        }
       else if (has_dollar_at && ifs_chars)
         list = list_string (istring, *ifs_chars ? ifs_chars : " ", 1);
       else
         {
           tword = make_bare_word (istring);
+set_word_flags:
           if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) || (quoted_state == WHOLLY_QUOTED))
             tword->flags |= W_QUOTED;
           if (word->flags & W_ASSIGNMENT)

subst.h

@@ -82 +82 @@
 /* Extract the <( or >( construct in STRING, and return a new string.
    Start extracting at (SINDEX) as if we had just seen "<(".
    Make (SINDEX) get the position just after the matching ")". */
-extern char *extract_process_subst __P((char *, char *, int *));
+extern char *extract_process_subst __P((char *, char *, int *, int));
 #endif /* PROCESS_SUBSTITUTION */
 
 /* Extract the name of the variable to bind to from the assignment string. */

bash-4.3

@@ -646 +646 @@
       return (v && invisible_p (v) == 0 && var_isset (v) ? TRUE : FALSE);
 
     case 'R':
-      v = find_variable (arg);
-      return (v && invisible_p (v) == 0 && var_isset (v) && nameref_p (v) ? TRUE : FALSE);
+      v = find_variable_noref (arg);
+      return ((v && invisible_p (v) == 0 && var_isset (v) && nameref_p (v)) ? TRUE : FALSE);
     }
 
   /* We can't actually get here, but this shuts up gcc. */
@@ -723 +723 @@
     case 'o': case 'p': case 'r': case 's': case 't':
     case 'u': case 'v': case 'w': case 'x': case 'z':
     case 'G': case 'L': case 'O': case 'S': case 'N':
+    case 'R':
       return (1);
     }
 

bash-4.3

@@ -920 +920 @@
       subst_assign_varlist = 0;
 
 #if defined (JOB_CONTROL)
-      save_pipeline (1);        /* XXX only provides one save level */
+      if (sig != DEBUG_TRAP)    /* run_debug_trap does this */
+        save_pipeline (1);      /* XXX only provides one save level */
 #endif
 
       /* If we're in a function, make sure return longjmps come here, too. */
@@ -940 +941 @@
       trap_exit_value = last_command_exit_value;
 
 #if defined (JOB_CONTROL)
-      restore_pipeline (1);
+      if (sig != DEBUG_TRAP)    /* run_debug_trap does this */
+        restore_pipeline (1);
 #endif
 
       subst_assign_varlist = save_subst_varlist;

variables.c

@@ -358 +358 @@
           temp_string[char_index] = ' ';
           strcpy (temp_string + char_index + 1, string);
 
-          if (posixly_correct == 0 || legal_identifier (name))
-            parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST);
-
-          /* Ancient backwards compatibility.  Old versions of bash exported
-             functions like name()=() {...} */
-          if (name[char_index - 1] == ')' && name[char_index - 2] == '(')
-            name[char_index - 2] = '\0';
+          /* Don't import function names that are invalid identifiers from the
+             environment, though we still allow them to be defined as shell
+             variables. */
+          if (legal_identifier (name))
+            parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST|SEVAL_FUNCDEF|SEVAL_ONECMD);
 
           if (temp_var = find_function (name))
             {
@@ -381 +379 @@
               last_command_exit_value = 1;
               report_error (_("error importing function definition for `%s'"), name);
             }
-
-          /* ( */
-          if (name[char_index - 1] == ')' && name[char_index - 2] == '\0')
-            name[char_index - 2] = '(';         /* ) */
         }
 #if defined (ARRAY_VARS)
 #  if ARRAY_EXPORT
@@ -2197 +2191 @@
   /* local foo; local foo;  is a no-op. */
   old_var = find_variable (name);
   if (old_var && local_p (old_var) && old_var->context == variable_context)
-    {
-      VUNSETATTR (old_var, att_invisible);      /* XXX */
-      return (old_var);
-    }
+    return (old_var);
 
   was_tmpvar = old_var && tempvar_p (old_var);
   /* If we're making a local variable in a shell function, the temporary env

y.tab.c

@@ -4736 +4736 @@
          not already end in an EOF character.  */
       if (shell_input_line_terminator != EOF)
         {
-          if (shell_input_line_size < SIZE_MAX && shell_input_line_len > shell_input_line_size - 3)
+          if (shell_input_line_size < SIZE_MAX-3 && (shell_input_line_len+3 > shell_input_line_size))
             shell_input_line = (char *)xrealloc (shell_input_line,
                                         1 + (shell_input_line_size += 2));
 
@@ -4954 +4954 @@
   int r;
 
   r = 0;
-  while (need_here_doc)
+  while (need_here_doc > 0)
     {
       parser_state |= PST_HEREDOC;
       make_here_document (redir_stack[r++], line_number);
@@ -5265 +5265 @@
   FREE (word_desc_to_read);
   word_desc_to_read = (WORD_DESC *)NULL;
 
+  eol_ungetc_lookahead = 0;
+
   current_token = '\n';         /* XXX */
   last_read_token = '\n';
   token_to_read = '\n';
@@ -5710 +5712 @@
          within a double-quoted ${...} construct "an even number of
          unescaped double-quotes or single-quotes, if any, shall occur." */
       /* This was changed in Austin Group Interp 221 */
-      if MBTEST(posixly_correct && shell_compatibility_level > 41 && dolbrace_state != DOLBRACE_QUOTE && (flags & P_DQUOTE) && (flags & P_DOLBRACE) && ch == '\'')
+      if MBTEST(posixly_correct && shell_compatibility_level > 41 && dolbrace_state != DOLBRACE_QUOTE && dolbrace_state != DOLBRACE_QUOTE2 && (flags & P_DQUOTE) && (flags & P_DOLBRACE) && ch == '\'')
         continue;
 
       /* Could also check open == '`' if we want to parse grouping constructs
@@ -8387 +8389 @@
 
   ps->expand_aliases = expand_aliases;
   ps->echo_input_at_read = echo_input_at_read;
+  ps->need_here_doc = need_here_doc;
 
   ps->token = token;
   ps->token_buffer_size = token_buffer_size;
@@ -8435 +8438 @@
 
   expand_aliases = ps->expand_aliases;
   echo_input_at_read = ps->echo_input_at_read;
+  need_here_doc = ps->need_here_doc;
 
   FREE (token);
   token = ps->token;
@@ -8537 +8541 @@
     }
 }
 #endif /* HANDLE_MULTIBYTE */
-