source: patches/bash-4.0-branch_update-6.patch@ 0bf41523

arrayfunc.c

@@ -604 +604 @@
     }
 }
 
-/* This function assumes s[i] == '['; returns with s[ret] == ']' if
-   an array subscript is correctly parsed. */
-int
-skipsubscript (s, i)
-     const char *s;
-     int i;
-{
-  int count, c;
-#if defined (HANDLE_MULTIBYTE)
-  mbstate_t state, state_bak;
-  size_t slength, mblength;
-#endif
-
-#if defined (HANDLE_MULTIBYTE)
-  memset (&state, '\0', sizeof (mbstate_t));
-  slength = strlen (s + i);
-#endif
-  
-  count = 1;
-  while (count)
-    {
-      /* Advance one (possibly multibyte) character in S starting at I. */
-#if defined (HANDLE_MULTIBYTE)
-      if (MB_CUR_MAX > 1)
-        {
-          state_bak = state;
-          mblength = mbrlen (s + i, slength, &state);
-
-          if (MB_INVALIDCH (mblength))
-            {
-              state = state_bak;
-              i++;
-              slength--;
-            }
-          else if (MB_NULLWCH (mblength))
-            return i;
-          else
-            {
-              i += mblength;
-              slength -= mblength;
-            }
-        }
-      else
-#endif
-      ++i;
-
-      c = s[i];
-
-      if (c == 0)
-        break;
-      else if (c == '[')
-        count++;
-      else if (c == ']')
-        count--;
-    }
-
-  return i;
-}
+/* skipsubscript moved to subst.c to use private functions. 2009/02/24. */
 
 /* This function is called with SUB pointing to just after the beginning
    `[' of an array subscript and removes the array element to which SUB

builtins/declare.def

@@ -295 +295 @@
       subscript_start = (char *)NULL;
       if (t = strchr (name, '['))       /* ] */
         {
+          /* If offset != 0 we have already validated any array reference */
+          if (offset == 0 && valid_array_reference (name) == 0)
+            {
+              sh_invalidid (name);
+              assign_error++;
+              NEXT_VARIABLE ();
+            }
           subscript_start = t;
           *t = '\0';
           making_array_special = 1;
@@ -484 +491 @@
             }
           /* declare -a name[[n]] or declare name[n] makes name an indexed
              array variable. */
-          else if ((making_array_special || (flags_on & att_array)) && array_p (var) == 0)
+          else if ((making_array_special || (flags_on & att_array)) && array_p (var) == 0 && assoc_p (var) == 0)
             var = convert_var_to_array (var);
 #endif /* ARRAY_VARS */
 

builtins/exit.def

@@ -113 +113 @@
       for (i = stopmsg = 0; i < js.j_jobslots; i++)
         if (jobs[i] && STOPPED (i))
           stopmsg = JSTOPPED;
-        else if (check_jobs_at_exit && stopmsg == 0 && RUNNING (i))
+        else if (check_jobs_at_exit && stopmsg == 0 && jobs[i] && RUNNING (i))
           stopmsg = JRUNNING;
 
       if (stopmsg == JSTOPPED)

builtins/fc.def

@@ -88 +88 @@
 extern int current_command_line_count;
 extern int literal_history;
 extern int posixly_correct;
+extern int subshell_environment, interactive_shell;
 
 extern int unlink __P((const char *));
 
@@ -172 +173 @@
   register int i;
   register char *sep;
   int numbering, reverse, listing, execute;
-  int histbeg, histend, last_hist, retval, opt;
+  int histbeg, histend, last_hist, retval, opt, rh;
   FILE *stream;
   REPL *rlist, *rl;
   char *ename, *command, *newcom, *fcedit;
@@ -275 +276 @@
 
       fprintf (stderr, "%s\n", command);
       fc_replhist (command);    /* replace `fc -s' with command */
+      /* Posix says that the re-executed commands should be entered into the
+         history. */
       return (parse_and_execute (command, "fc", SEVAL_NOHIST));
     }
 
@@ -293 +296 @@
      line was actually added (HISTIGNORE may have caused it to not be),
      so we check hist_last_line_added. */
 
-  last_hist = i - remember_on_history - hist_last_line_added;
+  /* Even though command substitution through parse_and_execute turns off
+     remember_on_history, command substitution in a shell when set -o history
+     has been enabled (interactive or not) should use it in the last_hist
+     calculation as if it were on. */
+  rh = remember_on_history || ((subshell_environment & SUBSHELL_COMSUB) && enable_history_list);
+  last_hist = i - rh - hist_last_line_added;
 
   if (list)
     {
@@ -456 +464 @@
      char *command;
      HIST_ENTRY **hlist;
 {
-  int sign, n, clen;
+  int sign, n, clen, rh;
   register int i, j;
   register char *s;
 
@@ -472 +480 @@
      line was actually added (HISTIGNORE may have caused it to not be),
      so we check hist_last_line_added.  This needs to agree with the
      calculation of last_hist in fc_builtin above. */
-  i -= remember_on_history + hist_last_line_added;
+  /* Even though command substitution through parse_and_execute turns off
+     remember_on_history, command substitution in a shell when set -o history
+     has been enabled (interactive or not) should use it in the last_hist
+     calculation as if it were on. */
+  rh = remember_on_history || ((subshell_environment & SUBSHELL_COMSUB) && enable_history_list);
+  i -= rh + hist_last_line_added;
 
   /* No specification defaults to most recent command. */
   if (command == NULL)

builtins/read.def

@@ -369 +369 @@
       code = setjmp (alrmbuf);
       if (code)
         {
-#if 0
+          /* Tricky.  The top of the unwind-protect stack is the free of
+             input_string.  We want to run all the rest and use input_string,
+             so we have to remove it from the stack. */
+          remove_unwind_protect ();
           run_unwind_frame ("read_builtin");
-          return (EXECUTION_FAILURE);
-#else
           input_string[i] = '\0';       /* make sure it's terminated */
-          retval = 128+SIGALRM;;
+          retval = 128+SIGALRM;
           goto assign_vars;
-#endif
         }
       old_alrm = set_signal_handler (SIGALRM, sigalrm);
       add_unwind_protect (reset_alarm, (char *)NULL);

doc/bash.1

@@ -8257 +8257 @@
 Exit after reading and executing one command.
 .TP 8
 .B \-u
-Treat unset variables as an error when performing
+Treat unset variables and parameters other than the special
+parameters "@" and "*" as an error when performing
 parameter expansion.  If expansion is attempted on an
-unset variable, the shell prints an error message, and,
+unset variable or parameter, the shell prints an error message, and,
 if not interactive, exits with a non-zero status.
 .TP 8
 .B \-v

doc/bashref.texi

@@ -4138 +4138 @@
 Exit after reading and executing one command.
 
 @item -u
-Treat unset variables as an error when performing parameter expansion.
+Treat unset variables and parameters other than the special parameters
+@samp{@@} or @samp{*} as an error when performing parameter expansion.
 An error message will be written to the standard error, and a non-interactive
 shell will exit.
 

execute_cmd.c

@@ -568 +568 @@
 
       /* Fork a subshell, turn off the subshell bit, turn off job
          control and call execute_command () on the command again. */
+      line_number_for_err_trap = line_number;
       paren_pid = make_child (savestring (make_command_string (command)),
                               asynchronous);
       if (paren_pid == 0)
@@ -610 +611 @@
               if (user_subshell && was_error_trap && ignore_return == 0 && invert == 0 && exec_result != EXECUTION_SUCCESS)
                 {
                   last_command_exit_value = exec_result;
+                  save_line_number = line_number;
+                  line_number = line_number_for_err_trap;
                   run_error_trap ();
+                  line_number = save_line_number;
                 }
 
               if (user_subshell && ignore_return == 0 && invert == 0 && exit_immediately_on_error && exec_result != EXECUTION_SUCCESS)
@@ -766 +770 @@
       if (was_error_trap && ignore_return == 0 && invert == 0 && pipe_in == NO_PIPE && pipe_out == NO_PIPE && exec_result != EXECUTION_SUCCESS)
         {
           last_command_exit_value = exec_result;
+          line_number = line_number_for_err_trap;
           run_error_trap ();
+          line_number = save_line_number;
         }
 
       if (ignore_return == 0 && invert == 0 &&
@@ -2105 +2111 @@
   REDIRECT *rp;
   COMMAND *tc, *second;
   int ignore_return, exec_result, was_error_trap, invert;
+  volatile int save_line_number;
 
   ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0;
 
@@ -2174 +2181 @@
       invert = (command->flags & CMD_INVERT_RETURN) != 0;
       ignore_return = (command->flags & CMD_IGNORE_RETURN) != 0;
 
+      line_number_for_err_trap = line_number;
       exec_result = execute_pipeline (command, asynchronous, pipe_in, pipe_out, fds_to_close);
 
       if (was_error_trap && ignore_return == 0 && invert == 0 && exec_result != EXECUTION_SUCCESS)
         {
           last_command_exit_value = exec_result;
+          save_line_number = line_number;
+          line_number = line_number_for_err_trap;
           run_error_trap ();
+          line_number = save_line_number;
         }
 
       if (ignore_return == 0 && invert == 0 && exit_immediately_on_error && exec_result != EXECUTION_SUCCESS)
@@ -2930 +2941 @@
                   retval = execute_command (clauses->action);
                 }
               while ((clauses->flags & CASEPAT_FALLTHROUGH) && (clauses = clauses->next));
-              if ((clauses->flags & CASEPAT_TESTNEXT) == 0)
+              if (clauses == 0 || (clauses->flags & CASEPAT_TESTNEXT) == 0)
                 EXIT_CASE ();
               else
                 break;

externs.h

@@ -192 +192 @@
 extern char *fmtumax __P((uintmax_t, int, char *, size_t, int));
 
 /* Declarations for functions defined in lib/sh/fpurge.c */
+
+#if defined NEED_FPURGE_DECL
 #if !HAVE_DECL_FPURGE
 
 #if HAVE_FPURGE
@@ -200 +202 @@
 extern int fpurge __P((FILE *stream));
 
 #endif /* HAVE_DECL_FPURGE */
-
+#endif /* NEED_FPURGE_DECL */
 
 /* Declarations for functions defined in lib/sh/getcwd.c */
 #if !defined (HAVE_GETCWD)

bash-4.0

@@ -442 +442 @@
   old_pipeline = the_pipeline;
   the_pipeline = saved_pipeline;
   already_making_children = saved_already_making_children;
-  if (discard)
+  if (discard && old_pipeline)
     discard_pipeline (old_pipeline);
 }
 
@@ -4202 +4202 @@
   sh_closepipe (pgrp_pipe);
 }
 
+void
+save_pgrp_pipe (p, clear)
+     int *p;
+     int clear;
+{
+  p[0] = pgrp_pipe[0];
+  p[1] = pgrp_pipe[1];
+  if (clear)
+    pgrp_pipe[0] = pgrp_pipe[1] = -1;
+}
+
+void
+restore_pgrp_pipe (p)
+     int *p;
+{
+  pgrp_pipe[0] = p[0];
+  pgrp_pipe[1] = p[1];
+}
+
 #endif /* PGRP_PIPE */

bash-4.0

@@ -235 +235 @@
 extern void init_job_stats __P((void));
 
 extern void close_pgrp_pipe __P((void));
+extern void save_pgrp_pipe __P((int *, int));
+extern void restore_pgrp_pipe __P((int *));
 
 #if defined (JOB_CONTROL)
 extern int job_control;

lib/glob/glob.c

@@ -356 +356 @@
         *np = 0;
       if (ep)
         *ep = 0;
-      if (r)
+      if (r && r != &glob_error_return)
         free (r);
       return (struct globval *)0;
     }
@@ -665 +665 @@
       (void) closedir (d);
     }
 
-  /* compat: if GX_ALLDIRS, add the passed directory also */
+  /* compat: if GX_ADDCURDIR, add the passed directory also.  Add an empty
+     directory name as a placeholder if GX_NULLDIR (in which case the passed
+     directory name is "."). */
   if (add_current)
     {
       sdlen = strlen (dir);
@@ -942 +944 @@
               char **array;
               register unsigned int l;
 
-              array = glob_dir_to_array (directories[i], temp_results, flags);
+              /* If we're expanding **, we don't need to glue the directory
+                 name to the results; we've already done it in glob_vector */
+              if ((dflags & GX_ALLDIRS) && filename[0] == '*' && filename[1] == '*' && filename[2] == '\0')
+                array = temp_results;
+              else
+                array = glob_dir_to_array (directories[i], temp_results, flags);
               l = 0;
               while (array[l] != NULL)
                 ++l;
@@ -959 +966 @@
               result[result_size - 1] = NULL;
 
               /* Note that the elements of ARRAY are not freed.  */
-              free ((char *) array);
+              if (array != temp_results)
+                free ((char *) array);
             }
         }
       /* Free the directories.  */
@@ -1003 +1011 @@
 
       /* Just return what glob_vector () returns appended to the
          directory name. */
+      /* If flags & GX_ALLDIRS, we're called recursively */
       dflags = flags & ~GX_MARKDIRS;
       if (directory_len == 0)
         dflags |= GX_NULLDIR;
       if ((flags & GX_GLOBSTAR) && filename[0] == '*' && filename[1] == '*' && filename[2] == '\0')
-        dflags |= GX_ALLDIRS|GX_ADDCURDIR;
+        {
+          dflags |= GX_ALLDIRS|GX_ADDCURDIR;
+#if 0
+          /* If we want all directories (dflags & GX_ALLDIRS) and we're not
+             being called recursively as something like `echo **/*.o'
+             ((flags & GX_ALLDIRS) == 0), we want to prevent glob_vector from
+             adding a null directory name to the front of the temp_results
+             array.  We turn off ADDCURDIR if not called recursively and
+             dlen == 0 */
+#endif
+          if (directory_len == 0 && (flags & GX_ALLDIRS) == 0)
+            dflags &= ~GX_ADDCURDIR;
+        }
       temp_results = glob_vector (filename,
                                   (directory_len == 0 ? "." : directory_name),
                                   dflags);

lib/readline/display.c

@@ -512 +512 @@
   /* Block keyboard interrupts because this function manipulates global
      data structures. */
   _rl_block_sigint ();  
+  RL_SETSTATE (RL_STATE_REDISPLAYING);
 
   if (!rl_display_prompt)
     rl_display_prompt = "";
@@ -1188 +1189 @@
       if (t < out)
         line[t - 1] = '>';
 
-      if (!rl_display_fixed || forced_display || lmargin != last_lmargin)
+      if (rl_display_fixed == 0 || forced_display || lmargin != last_lmargin)
         {
           forced_display = 0;
+          o_cpos = _rl_last_c_pos;
+          cpos_adjusted = 0;
           update_line (&visible_line[last_lmargin],
                        &invisible_line[lmargin],
                        0,
@@ -1198 +1201 @@
                        _rl_screenwidth + (lmargin ? 0 : wrap_offset),
                        0);
 
+          if ((MB_CUR_MAX > 1 && rl_byte_oriented == 0) &&
+              cpos_adjusted == 0 &&
+              _rl_last_c_pos != o_cpos &&
+              _rl_last_c_pos > wrap_offset &&
+              o_cpos < prompt_last_invisible)
+                _rl_last_c_pos -= prompt_invis_chars_first_line;        /* XXX - was wrap_offset */
+
           /* If the visible new line is shorter than the old, but the number
              of invisible characters is greater, and we are at the end of
              the new line, we need to clear to eol. */
@@ -1236 +1246 @@
       visible_wrap_offset = wrap_offset;
   }
 
+  RL_UNSETSTATE (RL_STATE_REDISPLAYING);
   _rl_release_sigint ();
 }
 
@@ -1772 +1783 @@
              space_to_eol will insert too many spaces.  XXX - maybe we should
              adjust col_lendiff based on the difference between _rl_last_c_pos
              and _rl_screenwidth */
-          if (col_lendiff && (_rl_last_c_pos < _rl_screenwidth))
+          if (col_lendiff && ((MB_CUR_MAX == 1 || rl_byte_oriented) || (_rl_last_c_pos < _rl_screenwidth)))
 #endif
             {     
               if (_rl_term_autowrap && current_line < inv_botlin)
@@ -1892 +1903 @@
 
   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
      a multibyte string, but _rl_last_c_pos is the display position.  In
@@ -1905 +1920 @@
          prompt string, since they're both buffer indices and DPOS is a
          desired display position. */
       if ((new > prompt_last_invisible) ||              /* XXX - don't use woff here */
-          (prompt_physical_chars > _rl_screenwidth &&
+          (prompt_physical_chars >= _rl_screenwidth &&
            _rl_last_v_pos == prompt_last_screen_line &&
-           wrap_offset >= woff &&
+           wrap_offset >= woff && dpos >= woff &&
            new > (prompt_last_invisible-(_rl_screenwidth*_rl_last_v_pos)-wrap_offset)))
            /* XXX last comparison might need to be >= */
         {

lib/readline/readline.h

@@ -814 +814 @@
 #define RL_STATE_VIMOTION       0x100000        /* reading vi motion arg */
 #define RL_STATE_MULTIKEY       0x200000        /* reading multiple-key command */
 #define RL_STATE_VICMDONCE      0x400000        /* entered vi command mode at least once */
+#define RL_STATE_REDISPLAYING   0x800000        /* updating terminal display */
 
-#define RL_STATE_DONE           0x800000        /* done; accepted line */
+#define RL_STATE_DONE           0x1000000       /* done; accepted line */
 
 #define RL_SETSTATE(x)          (rl_readline_state |= (x))
 #define RL_UNSETSTATE(x)        (rl_readline_state &= ~(x))

lib/readline/terminal.c

@@ -355 +355 @@
       _rl_get_screen_size (fileno (rl_instream), 1);
       if (CUSTOM_REDISPLAY_FUNC ())
         rl_forced_update_display ();
-      else
+      else if (RL_ISSTATE(RL_STATE_REDISPLAYING) == 0)
         _rl_redisplay_after_sigwinch ();
     }
 }

lib/sh/winsize.c

@@ -30 +30 @@
 
 #include <sys/ioctl.h>
 
-#if !defined (STRUCT_WINSIZE_IN_SYS_IOCTL)
-/* For struct winsize on SCO */
-/*   sys/ptem.h has winsize but needs mblk_t from sys/stream.h */
-#  if defined (HAVE_SYS_PTEM_H) && defined (TIOCGWINSZ) && defined (SIGWINCH)
-#    if defined (HAVE_SYS_STREAM_H)
-#      include <sys/stream.h>
-#    endif
+/* Try to find the definitions of `struct winsize' and TIOGCWINSZ */
+
+#if defined (GWINSZ_IN_SYS_IOCTL) && !defined (TIOCGWINSZ)
+#  include <sys/ioctl.h>
+#endif /* GWINSZ_IN_SYS_IOCTL && !TIOCGWINSZ */
+
+#if defined (STRUCT_WINSIZE_IN_TERMIOS) && !defined (STRUCT_WINSIZE_IN_SYS_IOCTL)
+#  include <termios.h>
+#endif /* STRUCT_WINSIZE_IN_TERMIOS && !STRUCT_WINSIZE_IN_SYS_IOCTL */
+
+/* Not in either of the standard places, look around. */
+#if !defined (STRUCT_WINSIZE_IN_TERMIOS) && !defined (STRUCT_WINSIZE_IN_SYS_IOCTL)
+#  if defined (HAVE_SYS_STREAM_H)
+#    include <sys/stream.h>
+#  endif /* HAVE_SYS_STREAM_H */
+#  if defined (HAVE_SYS_PTEM_H) /* SVR4.2, at least, has it here */
 #    include <sys/ptem.h>
-#  endif /* HAVE_SYS_PTEM_H && TIOCGWINSZ && SIGWINCH */
-#endif /* !STRUCT_WINSIZE_IN_SYS_IOCTL */
+#    define _IO_PTEM_H          /* work around SVR4.2 1.1.4 bug */
+#  endif /* HAVE_SYS_PTEM_H */
+#  if defined (HAVE_SYS_PTE_H)  /* ??? */
+#    include <sys/pte.h>
+#  endif /* HAVE_SYS_PTE_H */
+#endif /* !STRUCT_WINSIZE_IN_TERMIOS && !STRUCT_WINSIZE_IN_SYS_IOCTL */
 
 #include <stdio.h>
 

parse.y

@@ -1122 +1122 @@
                           REDIRECTEE rd;
                           REDIRECT *r;
 
-                          tc = $1;
+                          tc = $1->type == cm_simple ? (COMMAND *)$1->value.Simple : $1;
                           rd.dest = 1;
                           r = make_redirection (2, r_duplicating_output, rd);
                           if (tc->redirects)
@@ -1615 +1615 @@
 {
   int *ret;
 
-  ret = (int *)xmalloc (3 * sizeof (int));
+  ret = (int *)xmalloc (4 * sizeof (int));
   ret[0] = last_read_token;
   ret[1] = token_before_that;
   ret[2] = two_tokens_ago;
+  ret[3] = current_token;
   return ret;
 }
 
@@ -1631 +1632 @@
   last_read_token = ts[0];
   token_before_that = ts[1];
   two_tokens_ago = ts[2];
+  current_token = ts[3];
 }
 
 /*
@@ -1877 +1879 @@
     prompt_again ();
   ret = read_a_line (remove_quoted_newline);
 #if defined (HISTORY)
-  if (remember_on_history && (parser_state & PST_HEREDOC))
+  if (ret && remember_on_history && (parser_state & PST_HEREDOC))
     {
       /* To make adding the the here-document body right, we need to rely
          on history_delimiting_chars() returning \n for the first line of
@@ -2668 +2670 @@
   FREE (word_desc_to_read);
   word_desc_to_read = (WORD_DESC *)NULL;
 
+  current_token = '\n';         /* XXX */
   last_read_token = '\n';
   token_to_read = '\n';
 }
@@ -2915 +2918 @@
 #define P_DQUOTE        0x04
 #define P_COMMAND       0x08    /* parsing a command, so look for comments */
 #define P_BACKQUOTE     0x10    /* parsing a backquoted command substitution */
+#define P_ARRAYSUB      0x20    /* parsing a [...] array subscript for assignment */
 
 /* Lexical state while parsing a grouping construct or $(...). */
 #define LEX_WASDOL      0x001
@@ -2927 +2931 @@
 #define LEX_INHEREDOC   0x080
 #define LEX_HEREDELIM   0x100           /* reading here-doc delimiter */
 #define LEX_STRIPDOC    0x200           /* <<- strip tabs from here doc delim */
+#define LEX_INWORD      0x400
 
 #define COMSUB_META(ch)         ((ch) == ';' || (ch) == '&' || (ch) == '|')
 
@@ -3129 +3134 @@
               APPEND_NESTRET ();
               FREE (nestret);
             }
+          else if ((flags & P_ARRAYSUB) && (tflags & LEX_WASDOL) && (ch == '(' || ch == '{' || ch == '['))      /* ) } ] */
+            goto parse_dollar_word;
         }
       /* Parse an old-style command substitution within double quotes as a
          single word. */
@@ -3145 +3152 @@
       else if MBTEST(open != '`' && (tflags & LEX_WASDOL) && (ch == '(' || ch == '{' || ch == '['))     /* ) } ] */
         /* check for $(), $[], or ${} inside quoted string. */
         {
+parse_dollar_word:
           if (open == ch)       /* undo previous increment */
             count--;
           if (ch == '(')                /* ) */
@@ -3179 +3187 @@
      int open, close;
      int *lenp, flags;
 {
-  int count, ch, peekc, tflags, lex_rwlen, lex_firstind;
+  int count, ch, peekc, tflags, lex_rwlen, lex_wlen, lex_firstind;
   int nestlen, ttranslen, start_lineno;
   char *ret, *nestret, *ttrans, *heredelim;
   int retind, retsize, rflags, hdlen;
@@ -3200 +3208 @@
   retind = 0;
 
   start_lineno = line_number;
-  lex_rwlen = 0;
+  lex_rwlen = lex_wlen = 0;
 
   heredelim = 0;
   lex_firstind = -1;
@@ -3267 +3275 @@
           continue;
         }
 
+      if (tflags & LEX_PASSNEXT)                /* last char was backslash */
+        {
+/*itrace("parse_comsub:%d: lex_passnext -> 0 ch = `%c' (%d)", line_number, ch, __LINE__);*/
+          tflags &= ~LEX_PASSNEXT;
+          if (qc != '\'' && ch == '\n') /* double-quoted \<newline> disappears. */
+            {
+              if (retind > 0)
+                retind--;       /* swallow previously-added backslash */
+              continue;
+            }
+
+          RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64);
+          if MBTEST(ch == CTLESC || ch == CTLNUL)
+            ret[retind++] = CTLESC;
+          ret[retind++] = ch;
+          continue;
+        }
+
+      /* If this is a shell break character, we are not in a word.  If not,
+         we either start or continue a word. */
+      if MBTEST(shellbreak (ch))
+        {
+          tflags &= ~LEX_INWORD;
+/*itrace("parse_comsub:%d: lex_inword -> 0 ch = `%c' (%d)", line_number, ch, __LINE__);*/
+        }
+      else
+        {
+          if (tflags & LEX_INWORD)
+            {
+              lex_wlen++;
+/*itrace("parse_comsub:%d: lex_inword == 1 ch = `%c' lex_wlen = %d (%d)", line_number, ch, lex_wlen, __LINE__);*/
+            }         
+          else
+            {
+/*itrace("parse_comsub:%d: lex_inword -> 1 ch = `%c' (%d)", line_number, ch, __LINE__);*/
+              tflags |= LEX_INWORD;
+              lex_wlen = 0;
+            }
+        }
+
       /* Skip whitespace */
       if MBTEST(shellblank (ch) && lex_rwlen == 0)
         {
@@ -3306 +3354 @@
         }
 
       /* Meta-characters that can introduce a reserved word.  Not perfect yet. */
-      if MBTEST((tflags & LEX_RESWDOK) == 0 && (tflags & LEX_CKCASE) && (tflags & LEX_INCOMMENT) == 0 && shellmeta(ch))
+      if MBTEST((tflags & LEX_RESWDOK) == 0 && (tflags & LEX_CKCASE) && (tflags & LEX_INCOMMENT) == 0 && (shellmeta(ch) || ch == '\n'))
         {
           /* Add this character. */
           RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64);
@@ -3364 +3412 @@
 }               
               tflags &= ~LEX_RESWDOK;
             }
-          else if (shellbreak (ch) == 0)
+          else if MBTEST((tflags & LEX_CKCOMMENT) && ch == '#' && (lex_rwlen == 0 || ((tflags & LEX_INWORD) && lex_wlen == 0)))
+            ;   /* don't modify LEX_RESWDOK if we're starting a comment */
+          else if MBTEST((tflags & LEX_INCASE) && ch != '\n')
+            /* If we can read a reserved word and we're in case, we're at the
+               point where we can read a new pattern list or an esac.  We
+               handle the esac case above.  If we read a newline, we want to
+               leave LEX_RESWDOK alone.  If we read anything else, we want to
+               turn off LEX_RESWDOK, since we're going to read a pattern list. */
 {
-              tflags &= ~LEX_RESWDOK;
+            tflags &= ~LEX_RESWDOK;
+/*itrace("parse_comsub:%d: lex_incase == 1 found `%c', lex_reswordok -> 0", line_number, ch);*/
+}
+          else if MBTEST(shellbreak (ch) == 0)
+{
+            tflags &= ~LEX_RESWDOK;
 /*itrace("parse_comsub:%d: found `%c', lex_reswordok -> 0", line_number, ch);*/
 }
         }
@@ -3394 +3454 @@
                 }
               else
                 shell_ungetc (peekc);
-              tflags |= LEX_HEREDELIM;
-              lex_firstind = -1;
+              if (peekc != '<')
+                {
+                  tflags |= LEX_HEREDELIM;
+                  lex_firstind = -1;
+                }
               continue;
             }
           else
-            ch = peekc;         /* fall through and continue XXX - this skips comments if peekc == '#' */
+            ch = peekc;         /* fall through and continue XXX */
         }
-      /* Not exactly right yet, should handle shell metacharacters, too.  If
-         any changes are made to this test, make analogous changes to subst.c:
-         extract_delimited_string(). */
-      else if MBTEST((tflags & LEX_CKCOMMENT) && (tflags & LEX_INCOMMENT) == 0 && ch == '#' && (retind == 0 || ret[retind-1] == '\n' || shellblank (ret[retind - 1])))
+      else if MBTEST((tflags & LEX_CKCOMMENT) && (tflags & LEX_INCOMMENT) == 0 && ch == '#' && (((tflags & LEX_RESWDOK) && lex_rwlen == 0) || ((tflags & LEX_INWORD) && lex_wlen == 0)))
+{
+/*itrace("parse_comsub:%d: lex_incomment -> 1 (%d)", line_number, __LINE__);*/
         tflags |= LEX_INCOMMENT;
+}
 
-      if (tflags & LEX_PASSNEXT)                /* last char was backslash */
-        {
-          tflags &= ~LEX_PASSNEXT;
-          if (qc != '\'' && ch == '\n') /* double-quoted \<newline> disappears. */
-            {
-              if (retind > 0)
-                retind--;       /* swallow previously-added backslash */
-              continue;
-            }
-
-          RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64);
-          if MBTEST(ch == CTLESC || ch == CTLNUL)
-            ret[retind++] = CTLESC;
-          ret[retind++] = ch;
-          continue;
-        }
-      else if MBTEST(ch == CTLESC || ch == CTLNUL)      /* special shell escapes */
+      if MBTEST(ch == CTLESC || ch == CTLNUL)   /* special shell escapes */
         {
           RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64);
           ret[retind++] = CTLESC;
@@ -4248 +4295 @@
                      ((token_index > 0 && assignment_acceptable (last_read_token) && token_is_ident (token, token_index)) ||
                       (token_index == 0 && (parser_state&PST_COMPASSIGN))))
         {
-          ttok = parse_matched_pair (cd, '[', ']', &ttoklen, 0);
+          ttok = parse_matched_pair (cd, '[', ']', &ttoklen, P_ARRAYSUB);
           if (ttok == &matched_pair_error)
             return -1;          /* Bail immediately. */
           RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2,
@@ -4449 +4496 @@
     case '}':           /* XXX */
     case AND_AND:
     case BANG:
+    case BAR_AND:
     case DO:
     case DONE:
     case ELIF:

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 28
 
 #endif /* _PATCHLEVEL_H_ */

pcomplete.c

@@ -1032 +1032 @@
   cmdlist = build_arg_list (funcname, text, lwords, cw);
 
   pps = &ps;
+  save_parser_state (pps);
   begin_unwind_frame ("gen-shell-function-matches");
   add_unwind_protect (restore_parser_state, (char *)pps);
   add_unwind_protect (dispose_words, (char *)cmdlist);

bash-4.0

@@ -448 +448 @@
 termsig_sighandler (sig)
      int sig;
 {
+  /* If we get called twice with the same signal before handling it,
+     terminate right away. */
+  if (
+#ifdef SIGHUP
+    sig != SIGHUP &&
+#endif
+#ifdef SIGINT
+    sig != SIGINT &&
+#endif
+#ifdef SIGDANGER
+    sig != SIGDANGER &&
+#endif
+#ifdef SIGPIPE
+    sig != SIGPIPE &&
+#endif
+#ifdef SIGALRM
+    sig != SIGALRM &&
+#endif
+#ifdef SIGTERM
+    sig != SIGTERM &&
+#endif
+#ifdef SIGXCPU
+    sig != SIGXCPU &&
+#endif
+#ifdef SIGXFSZ
+    sig != SIGXFSZ &&
+#endif
+#ifdef SIGVTALRM
+    sig != SIGVTALRM &&
+#endif
+#ifdef SIGLOST
+    sig != SIGLOST &&
+#endif
+#ifdef SIGUSR1
+    sig != SIGUSR1 &&
+#endif
+#ifdef SIGUSR2
+   sig != SIGUSR2 &&
+#endif
+   sig == terminating_signal)
+    terminate_immediately = 1;
+
   terminating_signal = sig;
 
   /* XXX - should this also trigger when interrupt_immediately is set? */

subst.c

@@ -85 +85 @@
 
 /* Flags for the `pflags' argument to param_expand() */
 #define PF_NOCOMSUB     0x01    /* Do not perform command substitution */
+#define PF_IGNUNBOUND   0x02    /* ignore unbound vars even if -u set */
 
 /* These defs make it easier to use the editor. */
 #define LBRACE          '{'
@@ -222 +223 @@
 static int skip_double_quoted __P((char *, size_t, int));
 static char *extract_delimited_string __P((char *, int *, char *, char *, char *, int));
 static char *extract_dollar_brace_string __P((char *, int *, int, int));
+static int skip_matched_pair __P((const char *, int, int, int, int));
 
 static char *pos_params __P((char *, int, int, int));
 
@@ -262 +264 @@
 static int chk_atstar __P((char *, int, int *, int *));
 static int chk_arithsub __P((const char *, int));
 
-static WORD_DESC *parameter_brace_expand_word __P((char *, int, int));
+static WORD_DESC *parameter_brace_expand_word __P((char *, int, int, int));
 static WORD_DESC *parameter_brace_expand_indir __P((char *, int, int, int *, int *));
 static WORD_DESC *parameter_brace_expand_rhs __P((char *, char *, int, int, int *, int *));
 static void parameter_brace_expand_error __P((char *, char *));
@@ -1374 +1376 @@
 
 #define CQ_RETURN(x) do { no_longjmp_on_fatal_error = 0; return (x); } while (0)
 
+/* This function assumes s[i] == open; returns with s[ret] == close; used to
+   parse array subscripts.  FLAGS currently unused. */
+static int
+skip_matched_pair (string, start, open, close, flags)
+     const char *string;
+     int start, open, close, flags;
+{
+  int i, pass_next, backq, si, c, count;
+  size_t slen;
+  char *temp, *ss;
+  DECLARE_MBSTATE;
+
+  slen = strlen (string + start) + start;
+  no_longjmp_on_fatal_error = 1;
+
+  i = start + 1;                /* skip over leading bracket */
+  count = 1;
+  pass_next = backq = 0;
+  ss = (char *)string;
+  while (c = string[i])
+    {
+      if (pass_next)
+        {
+          pass_next = 0;
+          if (c == 0)
+            CQ_RETURN(i);
+          ADVANCE_CHAR (string, slen, i);
+          continue;
+        }
+      else if (c == '\\')
+        {
+          pass_next = 1;
+          i++;
+          continue;
+        }
+      else if (backq)
+        {
+          if (c == '`')
+            backq = 0;
+          ADVANCE_CHAR (string, slen, i);
+          continue;
+        }
+      else if (c == '`')
+        {
+          backq = 1;
+          i++;
+          continue;
+        }
+      else if (c == open)
+        {
+          count++;
+          i++;
+          continue;
+        }
+      else if (c == close)
+        {
+          count--;
+          if (count == 0)
+            break;
+          i++;
+          continue;
+        }
+      else if (c == '\'' || c == '"')
+        {
+          i = (c == '\'') ? skip_single_quoted (ss, slen, ++i)
+                          : skip_double_quoted (ss, slen, ++i);
+          /* no increment, the skip functions increment past the closing quote. */
+        }
+      else if (c == '$' && (string[i+1] == LPAREN || string[i+1] == LBRACE))
+        {
+          si = i + 2;
+          if (string[si] == '\0')
+            CQ_RETURN(si);
+
+          if (string[i+1] == LPAREN)
+            temp = extract_delimited_string (ss, &si, "$(", "(", ")", SX_NOALLOC|SX_COMMAND); /* ) */
+          else
+            temp = extract_dollar_brace_string (ss, &si, 0, SX_NOALLOC);
+          i = si;
+          if (string[i] == '\0')        /* don't increment i past EOS in loop */
+            break;
+          i++;
+          continue;
+        }
+      else
+        ADVANCE_CHAR (string, slen, i);
+    }
+
+  CQ_RETURN(i);
+}
+
+#if defined (ARRAY_VARS)
+int
+skipsubscript (string, start)
+     const char *string;
+     int start;
+{
+  return (skip_matched_pair (string, start, '[', ']', 0));
+}
+#endif
+
 /* Skip characters in STRING until we find a character in DELIMS, and return
    the index of that character.  START is the index into string at which we
    begin.  This is similar in spirit to strpbrk, but it returns an index into
@@ -5093 +5196 @@
    the shell, e.g., "@", "$", "*", etc.  QUOTED, if non-zero, means that
    NAME was found inside of a double-quoted expression. */
 static WORD_DESC *
-parameter_brace_expand_word (name, var_is_special, quoted)
+parameter_brace_expand_word (name, var_is_special, quoted, pflags)
      char *name;
-     int var_is_special, quoted;
+     int var_is_special, quoted, pflags;
 {
   WORD_DESC *ret;
   char *temp, *tt;
@@ -5127 +5230 @@
       strcpy (tt + 1, name);
 
       ret = param_expand (tt, &sindex, quoted, (int *)NULL, (int *)NULL,
-                          (int *)NULL, (int *)NULL, 0);
+                          (int *)NULL, (int *)NULL, pflags);
       free (tt);
     }
 #if defined (ARRAY_VARS)
@@ -5188 +5291 @@
   char *temp, *t;
   WORD_DESC *w;
 
-  w = parameter_brace_expand_word (name, var_is_special, quoted);
+  w = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND);
   t = w->word;
   /* Have to dequote here if necessary */
   if (t)
@@ -5205 +5308 @@
   if (t == 0)
     return (WORD_DESC *)NULL;
 
-  w = parameter_brace_expand_word (t, SPECIAL_VAR(t, 0), quoted);
+  w = parameter_brace_expand_word (t, SPECIAL_VAR(t, 0), quoted, 0);
   free (t);
 
   return w;
@@ -6556 +6659 @@
   if (want_indir)
     tdesc = parameter_brace_expand_indir (name + 1, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at);
   else
-    tdesc = parameter_brace_expand_word (name, var_is_special, quoted);
+    tdesc = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND);
 
   if (tdesc)
     {
@@ -6664 +6767 @@
       return &expand_wdesc_error;
 
     case RBRACE:
-      if (var_is_set == 0 && unbound_vars_is_error)
+      if (var_is_set == 0 && unbound_vars_is_error && ((name[0] != '@' && name[0] != '*') || name[1]))
         {
+          last_command_exit_value = EXECUTION_FAILURE;
           err_unboundvar (name);
           FREE (value);
           FREE (temp);
           free (name);
-          last_command_exit_value = EXECUTION_FAILURE;
           return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
         }
       break;
@@ -6887 +6990 @@
     case '*':           /* `$*' */
       list = list_rest_of_args ();
 
-      if (list == 0 && unbound_vars_is_error)
+#if 0
+      /* According to austin-group posix proposal by Geoff Clare in
+         <20090505091501.GA10097@squonk.masqnet> of 5 May 2009:
+
+        "The shell shall write a message to standard error and
+         immediately exit when it tries to expand an unset parameter
+         other than the '@' and '*' special parameters."
+      */
+
+      if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0)
         {
           uerror[0] = '$';
           uerror[1] = '*';
           uerror[2] = '\0';
-          err_unboundvar (uerror);
           last_command_exit_value = EXECUTION_FAILURE;
+          err_unboundvar (uerror);
           return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
         }
+#endif
 
       /* If there are no command-line arguments, this should just
          disappear if there are other characters in the expansion,
@@ -6949 +7062 @@
     case '@':           /* `$@' */
       list = list_rest_of_args ();
 
-      if (list == 0 && unbound_vars_is_error)
+#if 0
+      /* According to austin-group posix proposal by Geoff Clare in
+         <20090505091501.GA10097@squonk.masqnet> of 5 May 2009:
+
+        "The shell shall write a message to standard error and
+         immediately exit when it tries to expand an unset parameter
+         other than the '@' and '*' special parameters."
+      */
+
+      if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0)
         {
           uerror[0] = '$';
           uerror[1] = '@';
           uerror[2] = '\0';
-          err_unboundvar (uerror);
           last_command_exit_value = EXECUTION_FAILURE;
+          err_unboundvar (uerror);
           return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal);
         }
+#endif
 
       /* We want to flag the fact that we saw this.  We can't turn
          off quoting entirely, because other characters in the

bash-4.0

@@ -755 +755 @@
         }
 
       flags = SEVAL_NONINT|SEVAL_NOHIST;
-      if (sig != DEBUG_TRAP && sig != RETURN_TRAP)
+      if (sig != DEBUG_TRAP && sig != RETURN_TRAP && sig != ERROR_TRAP)
         flags |= SEVAL_RESETLINE;
       if (function_code == 0)
         parse_and_execute (trap_command, tag, flags);
@@ -798 +798 @@
 run_debug_trap ()
 {
   int trap_exit_value;
+  pid_t save_pgrp;
+  int save_pipe[2];
 
   /* XXX - question:  should the DEBUG trap inherit the RETURN trap? */
   trap_exit_value = 0;
   if ((sigmodes[DEBUG_TRAP] & SIG_TRAPPED) && ((sigmodes[DEBUG_TRAP] & SIG_IGNORED) == 0) && ((sigmodes[DEBUG_TRAP] & SIG_INPROGRESS) == 0))
     {
+#if defined (JOB_CONTROL)
+      save_pgrp = pipeline_pgrp;
+      pipeline_pgrp = 0;
+      save_pipeline (1);
+#  if defined (PGRP_PIPE)
+      save_pgrp_pipe (save_pipe, 1);
+#  endif
+      stop_making_children ();
+#endif
+
       trap_exit_value = _run_trap_internal (DEBUG_TRAP, "debug trap");
+
+#if defined (JOB_CONTROL)
+      pipeline_pgrp = save_pgrp;
+      restore_pipeline (1);
+#  if defined (PGRP_PIPE)
+      close_pgrp_pipe ();
+      restore_pgrp_pipe (save_pipe);
+#  endif
+      if (pipeline_pgrp > 0)
+        give_terminal_to (pipeline_pgrp, 1);
+      notify_and_cleanup ();
+#endif
       
 #if defined (DEBUGGER)
       /* If we're in the debugger and the DEBUG trap returns 2 while we're in