From 9d8085074991d5c0a42d6fc96a2d1a3ee918aad1 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 27 Apr 2024 08:17:24 +0200
Subject: Adding upstream version 5.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 builtins/declare.def | 1000 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 1000 insertions(+)
 create mode 100644 builtins/declare.def

(limited to 'builtins/declare.def')

diff --git a/builtins/declare.def b/builtins/declare.def
new file mode 100644
index 0000000..21e4516
--- /dev/null
+++ b/builtins/declare.def
@@ -0,0 +1,1000 @@
+This file is declare.def, from which is created declare.c.
+It implements the builtins "declare" and "local" in Bash.
+
+Copyright (C) 1987-2020 Free Software Foundation, Inc.
+
+This file is part of GNU Bash, the Bourne Again SHell.
+
+Bash 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.
+
+Bash 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 Bash.  If not, see <http://www.gnu.org/licenses/>.
+
+$PRODUCES declare.c
+
+$BUILTIN declare
+$FUNCTION declare_builtin
+$SHORT_DOC declare [-aAfFgiIlnrtux] [-p] [name[=value] ...]
+Set variable values and attributes.
+
+Declare variables and give them attributes.  If no NAMEs are given,
+display the attributes and values of all variables.
+
+Options:
+  -f	restrict action or display to function names and definitions
+  -F	restrict display to function names only (plus line number and
+		source file when debugging)
+  -g	create global variables when used in a shell function; otherwise
+		ignored
+  -I	if creating a local variable, inherit the attributes and value
+		of a variable with the same name at a previous scope
+  -p	display the attributes and value of each NAME
+
+Options which set attributes:
+  -a	to make NAMEs indexed arrays (if supported)
+  -A	to make NAMEs associative arrays (if supported)
+  -i	to make NAMEs have the `integer' attribute
+  -l	to convert the value of each NAME to lower case on assignment
+  -n	make NAME a reference to the variable named by its value
+  -r	to make NAMEs readonly
+  -t	to make NAMEs have the `trace' attribute
+  -u	to convert the value of each NAME to upper case on assignment
+  -x	to make NAMEs export
+
+Using `+' instead of `-' turns off the given attribute.
+
+Variables with the integer attribute have arithmetic evaluation (see
+the `let' command) performed when the variable is assigned a value.
+
+When used in a function, `declare' makes NAMEs local, as with the `local'
+command.  The `-g' option suppresses this behavior.
+
+Exit Status:
+Returns success unless an invalid option is supplied or a variable
+assignment error occurs.
+$END
+
+$BUILTIN typeset
+$FUNCTION declare_builtin
+$SHORT_DOC typeset [-aAfFgiIlnrtux] [-p] name[=value] ...
+Set variable values and attributes.
+
+A synonym for `declare'.  See `help declare'.
+$END
+
+#include <config.h>
+
+#if defined (HAVE_UNISTD_H)
+#  ifdef _MINIX
+#    include <sys/types.h>
+#  endif
+#  include <unistd.h>
+#endif
+
+#include <stdio.h>
+
+#include "../bashansi.h"
+#include "../bashintl.h"
+
+#include "../shell.h"
+#include "../flags.h"
+#include "common.h"
+#include "builtext.h"
+#include "bashgetopt.h"
+
+static SHELL_VAR *declare_find_variable PARAMS((const char *, int, int));
+static int declare_internal PARAMS((register WORD_LIST *, int));
+
+/* Declare or change variable attributes. */
+int
+declare_builtin (list)
+     register WORD_LIST *list;
+{
+  return (declare_internal (list, 0));
+}
+
+$BUILTIN local
+$FUNCTION local_builtin
+$SHORT_DOC local [option] name[=value] ...
+Define local variables.
+
+Create a local variable called NAME, and give it VALUE.  OPTION can
+be any option accepted by `declare'.
+
+Local variables can only be used within a function; they are visible
+only to the function where they are defined and its children.
+
+Exit Status:
+Returns success unless an invalid option is supplied, a variable
+assignment error occurs, or the shell is not executing a function.
+$END
+int
+local_builtin (list)
+     register WORD_LIST *list;
+{
+  /* Catch a straight `local --help' before checking function context */
+  if (list && list->word && STREQ (list->word->word, "--help"))
+    {
+      builtin_help ();
+      return (EX_USAGE);
+    }
+    
+  if (variable_context)
+    return (declare_internal (list, 1));
+  else
+    {
+      builtin_error (_("can only be used in a function"));
+      return (EXECUTION_FAILURE);
+    }
+}
+
+#if defined (ARRAY_VARS)
+#  define DECLARE_OPTS	"+acfgilnprtuxAFGI"
+#else
+#  define DECLARE_OPTS	"+cfgilnprtuxFGI"
+#endif
+
+static SHELL_VAR *
+declare_find_variable (name, mkglobal, chklocal)
+     const char *name;
+     int mkglobal, chklocal;
+{
+  SHELL_VAR *var;
+
+  if (mkglobal == 0)
+    return (find_variable (name));
+  else if (chklocal)
+    {
+      var = find_variable (name);
+      if (var && local_p (var) && var->context == variable_context)
+	return var;
+      return (find_global_variable (name));
+    }
+  else
+    return (find_global_variable (name));
+}
+
+/* The workhorse function. */
+static int
+declare_internal (list, local_var)
+     register WORD_LIST *list;
+     int local_var;
+{
+  int flags_on, flags_off, *flags;
+  int any_failed, assign_error, pflag, nodefs, opt, onref, offref;
+  int mkglobal, chklocal, inherit_flag;
+  char *t, *subscript_start;
+  SHELL_VAR *var, *refvar, *v;
+  FUNCTION_DEF *shell_fn;
+
+  flags_on = flags_off = any_failed = assign_error = pflag = nodefs = 0;
+  mkglobal = chklocal = inherit_flag = 0;
+  refvar = (SHELL_VAR *)NULL;
+  reset_internal_getopt ();
+  while ((opt = internal_getopt (list, DECLARE_OPTS)) != -1)
+    {
+      flags = list_opttype == '+' ? &flags_off : &flags_on;
+
+      /* If you add options here, see whether or not they need to be added to
+	 the loop in subst.c:shell_expand_word_list() */
+      switch (opt)
+	{
+	case 'a':
+#if defined (ARRAY_VARS)
+	  *flags |= att_array;
+	  break;
+#else
+	  builtin_usage ();
+	  return (EX_USAGE);
+#endif
+	case 'A':
+#if defined (ARRAY_VARS)
+	  *flags |= att_assoc;
+	  break;
+#else
+	  builtin_usage ();
+	  return (EX_USAGE);
+#endif
+	case 'p':
+/*	  if (local_var == 0) */
+	    pflag++;
+	  break;
+        case 'F':
+	  nodefs++;
+	  *flags |= att_function;
+	  break;
+	case 'f':
+	  *flags |= att_function;
+	  break;
+	case 'G':
+	  if (flags == &flags_on)
+	    chklocal = 1;
+	  /*FALLTHROUGH*/
+	case 'g':
+	  if (flags == &flags_on)
+	    mkglobal = 1;
+	  break;
+	case 'i':
+	  *flags |= att_integer;
+	  break;
+	case 'n':
+	  *flags |= att_nameref;
+	  break;
+	case 'r':
+	  *flags |= att_readonly;
+	  break;
+	case 't':
+	  *flags |= att_trace;
+	  break;
+	case 'x':
+	  *flags |= att_exported;
+	  array_needs_making = 1;
+	  break;
+#if defined (CASEMOD_ATTRS)
+#  if defined (CASEMOD_CAPCASE)
+	 case 'c':
+	  *flags |= att_capcase;
+	  if (flags == &flags_on)
+	    flags_off |= att_uppercase|att_lowercase;
+	  break;
+#  endif
+	case 'l':
+	  *flags |= att_lowercase;
+	  if (flags == &flags_on)
+	    flags_off |= att_capcase|att_uppercase;
+	  break;
+	case 'u':
+	  *flags |= att_uppercase;
+	  if (flags == &flags_on)
+	    flags_off |= att_capcase|att_lowercase;
+	  break;
+#endif /* CASEMOD_ATTRS */
+	case 'I':
+	  inherit_flag = MKLOC_INHERIT;
+	  break;
+	CASE_HELPOPT;
+	default:
+	  builtin_usage ();
+	  return (EX_USAGE);
+	}
+    }
+
+  list = loptend;
+
+  /* If there are no more arguments left, then we just want to show
+     some variables. */
+  if (list == 0)	/* declare -[aAfFirtx] */
+    {
+      /* Show local variables defined at this context level if this is
+	 the `local' builtin. */
+      if (local_var)
+	show_local_var_attributes (0, nodefs);	/* XXX - fix up args later */
+      else if (pflag && (flags_on == 0 || flags_on == att_function))
+	show_all_var_attributes (flags_on == 0, nodefs);
+      else if (flags_on == 0)
+	return (set_builtin ((WORD_LIST *)NULL));
+      else
+	set_or_show_attributes ((WORD_LIST *)NULL, flags_on, nodefs);
+
+      return (sh_chkwrite (EXECUTION_SUCCESS));
+    }
+
+  if (pflag)	/* declare -p [-aAfFirtx] name [name...] */
+    {
+      for (any_failed = 0; list; list = list->next)
+	{
+	  if (flags_on & att_function)
+	    pflag = show_func_attributes (list->word->word, nodefs);
+	  else if (local_var)
+	    pflag = show_localname_attributes (list->word->word, nodefs);
+	  else
+	    pflag = show_name_attributes (list->word->word, nodefs);
+	  if (pflag)
+	    {
+	      sh_notfound (list->word->word);
+	      any_failed++;
+	    }
+	}
+      return (sh_chkwrite (any_failed ? EXECUTION_FAILURE : EXECUTION_SUCCESS));
+    }
+
+#define NEXT_VARIABLE() free (name); list = list->next; continue
+
+  /* There are arguments left, so we are making variables. */
+  while (list)		/* declare [-aAfFirx] name [name ...] */
+    {
+      char *value, *name, *oldname;
+      int offset, aflags, wflags, created_var, namelen;
+      int assoc_noexpand;
+#if defined (ARRAY_VARS)
+      int making_array_special, compound_array_assign, simple_array_assign;
+      int var_exists, array_exists, creating_array, array_subscript_assignment;
+#endif
+
+      name = savestring (list->word->word);
+      wflags = list->word->flags;
+#if defined (ARRAY_VARS)
+      assoc_noexpand = assoc_expand_once && (wflags & W_ASSIGNMENT);
+#else
+      assoc_noexpand = 0;
+#endif
+      offset = assignment (name, assoc_noexpand ? 2 : 0);
+      aflags = 0;
+      created_var = 0;
+
+      if (local_var && variable_context && STREQ (name, "-"))
+	{
+	  var = make_local_variable ("-", 0);
+	  FREE (value_cell (var));		/* just in case */
+	  value = get_current_options ();
+	  var_setvalue (var, value);
+	  VSETATTR (var, att_invisible);
+	  NEXT_VARIABLE ();
+	}
+
+      if (offset)	/* declare [-aAfFirx] name=value */
+	{
+	  name[offset] = '\0';
+	  value = name + offset + 1;
+	  if (name[offset - 1] == '+')
+	    {
+	      aflags |= ASS_APPEND;
+	      name[offset - 1] = '\0';
+	    }
+	}
+      else
+	value = "";
+
+      /* Do some lexical error checking on the LHS and RHS of the assignment
+	 that is specific to nameref variables. */
+      if (flags_on & att_nameref)
+	{
+#if defined (ARRAY_VARS)
+	  if (valid_array_reference (name, 0))
+	    {
+	      builtin_error (_("%s: reference variable cannot be an array"), name);
+	      assign_error++;
+	      NEXT_VARIABLE ();
+	    }
+	  else
+#endif
+	  /* disallow self references at global scope, warn at function scope */
+	  if (check_selfref (name, value, 0))
+	    {
+	      if (variable_context == 0)
+		{
+		  builtin_error (_("%s: nameref variable self references not allowed"), name);
+		  assign_error++;
+		  NEXT_VARIABLE ();
+		}
+	      else
+		builtin_warning (_("%s: circular name reference"), name);
+	    }
+#if 1
+	  if (value && *value && (aflags & ASS_APPEND) == 0 && valid_nameref_value (value, 1) == 0)
+	    {
+	      builtin_error (_("`%s': invalid variable name for name reference"), value);
+	      assign_error++;
+	      NEXT_VARIABLE ();
+	    }
+#endif
+	}
+
+restart_new_var_name:
+#if defined (ARRAY_VARS)
+      var_exists = array_exists = creating_array = 0;
+      compound_array_assign = simple_array_assign = 0;
+      array_subscript_assignment = 0;
+      subscript_start = (char *)NULL;
+      if ((t = strchr (name, '[')) && (flags_on & att_function) == 0)	/* ] */
+	{
+	  /* If offset != 0 we have already validated any array reference
+	     because assignment() calls skipsubscript() */
+	  if (offset == 0 && valid_array_reference (name, 0) == 0)
+	    {
+	      sh_invalidid (name);
+	      assign_error++;
+	      NEXT_VARIABLE ();
+	    }
+	  subscript_start = t;
+	  *t = '\0';
+	  making_array_special = 1;	/* XXX - should this check offset? */
+	  array_subscript_assignment = offset != 0;
+	}
+      else
+	making_array_special = 0;
+#endif
+
+      /* If we're in posix mode or not looking for a shell function (since
+	 shell function names don't have to be valid identifiers when the
+	 shell's not in posix mode), check whether or not the argument is a
+	 valid, well-formed shell identifier. */
+      if ((posixly_correct || (flags_on & att_function) == 0) && legal_identifier (name) == 0)
+	{
+	  sh_invalidid (name);
+	  assign_error++;
+	  NEXT_VARIABLE ();
+	}
+
+      /* If VARIABLE_CONTEXT has a non-zero value, then we are executing
+	 inside of a function.  This means we should make local variables,
+	 not global ones. */
+
+      /* XXX - this has consequences when we're making a local copy of a
+	       variable that was in the temporary environment.  Watch out
+	       for this. */
+      refvar = (SHELL_VAR *)NULL;
+      if (variable_context && mkglobal == 0 && ((flags_on & att_function) == 0))
+	{
+	  char *newname;
+
+	  /* check name for validity here? */
+	  var = find_variable (name);
+	  if (var == 0)
+	    newname = nameref_transform_name (name, ASS_MKLOCAL);
+	  else if ((flags_on & att_nameref) == 0 && (flags_off & att_nameref) == 0)
+	    {
+	      /* Ok, we're following namerefs here, so let's make sure that if
+		 we followed one, it was at the same context (see below for
+		 more details). */
+	      refvar = find_variable_last_nameref (name, 1);
+	      newname = (refvar && refvar->context != variable_context) ? name : var->name;
+	      refvar = (SHELL_VAR *)NULL;
+	    }
+	  else
+	    newname = name;	/* dealing with nameref attribute */
+
+#if defined (ARRAY_VARS)
+	  /* Pass 1 as second argument to make_local_{assoc,array}_variable
+	     return an existing {array,assoc} variable to be flagged as an
+	     error below. */
+	  if (flags_on & att_assoc)
+	    var = make_local_assoc_variable (newname, MKLOC_ARRAYOK|inherit_flag);
+	  else if ((flags_on & att_array) || making_array_special)
+	    var = make_local_array_variable (newname, MKLOC_ASSOCOK|inherit_flag);
+	  else
+#endif
+	  if (offset == 0 && (flags_on & att_nameref))
+	    {
+	      /* First look for refvar at current scope */
+	      refvar = find_variable_last_nameref (name, 1);
+	      /* VARIABLE_CONTEXT != 0, so we are attempting to create or modify
+		 the attributes for a local variable at the same scope.  If we've
+		 used a reference from a previous context to resolve VAR, we
+		 want to throw REFVAR and VAR away and create a new local var. */
+	      if (refvar && refvar->context != variable_context)
+		{
+		  refvar = 0;
+		  var = make_local_variable (name, inherit_flag);
+		}
+	      else if (refvar && refvar->context == variable_context)
+		var = refvar;
+	      /* Maybe we just want to create a new local variable */
+	      else if (var == 0 || var->context != variable_context)
+		var = make_local_variable (name, inherit_flag);
+	      /* otherwise we have a var at the right context */
+	    }
+	  else
+	    /* XXX - check name for validity here with valid_nameref_value */
+	    var = make_local_variable ((flags_on & att_nameref) ? name : newname, inherit_flag);	/* sets att_invisible for new vars */
+
+	  if (var == 0)
+	    {
+	      any_failed++;
+	      NEXT_VARIABLE ();
+	    }
+	  if (var && nameref_p (var) && readonly_p (var) && nameref_cell (var) && (flags_off & att_nameref))
+	    {
+	      sh_readonly (name);
+	      any_failed++;
+	      NEXT_VARIABLE ();
+	    }
+	}
+      else
+	var = (SHELL_VAR *)NULL;
+
+      /* If we are declaring a function, then complain about it in some way.
+	 We don't let people make functions by saying `typeset -f foo=bar'. */
+
+      /* There should be a way, however, to let people look at a particular
+	 function definition by saying `typeset -f foo'. */
+
+      if (flags_on & att_function)
+	{
+	  if (offset)	/* declare -f [-rix] foo=bar */
+	    {
+	      builtin_error (_("cannot use `-f' to make functions"));
+	      free (name);
+	      return (EXECUTION_FAILURE);
+	    }
+	  else		/* declare -f [-rx] name [name...] */
+	    {
+	      var = find_function (name);
+
+	      if (var)
+		{
+		  if (readonly_p (var) && (flags_off & att_readonly))
+		    {
+		      builtin_error (_("%s: readonly function"), name);
+		      any_failed++;
+		      NEXT_VARIABLE ();
+		    }
+		  else if (flags_on & (att_array|att_assoc))
+		    {
+		      sh_invalidopt ((flags_on & att_array) ? "-a" : "-A");
+		      any_failed++;
+		      NEXT_VARIABLE ();
+		    }
+		  /* declare -[Ff] name [name...] */
+		  if (flags_on == att_function && flags_off == 0)
+		    {
+#if defined (DEBUGGER)
+		      if (nodefs && debugging_mode)
+			{
+			  shell_fn = find_function_def (var->name);
+			  if (shell_fn)
+			    printf ("%s %d %s\n", var->name, shell_fn->line, shell_fn->source_file);
+			  else
+			    printf ("%s\n", var->name);
+			}
+		      else
+#endif /* DEBUGGER */
+			{	
+			  t = nodefs ? var->name
+				     : named_function_string (name, function_cell (var), FUNC_MULTILINE|FUNC_EXTERNAL);
+			  printf ("%s\n", t);
+			  any_failed = sh_chkwrite (any_failed);
+			}
+		    }
+		  else		/* declare -[fF] -[rx] name [name...] */
+		    {
+		      VSETATTR (var, flags_on);
+		      flags_off &= ~att_function;	/* makes no sense */
+		      VUNSETATTR (var, flags_off);
+		    }
+		}
+	      else
+		any_failed++;
+	      NEXT_VARIABLE ();
+	    }
+	}
+      else		/* declare -[aAinrx] name [name...] */
+	{
+	  /* Non-null if we just created or fetched a local variable. */
+#if 0
+	  /* This is bash-4.3 code. */
+	  /* Here's what ksh93 seems to do.  If we are modifying an existing
+	     nameref variable, we don't follow the nameref chain past the last
+	     nameref, and we set the nameref variable's value so future
+	     references to that variable will return the value of the variable
+	     we're assigning right now. */
+#else
+	  /* Here's what ksh93 seems to do as of the 2012 version: if we are
+	     using declare -n to modify the value of an existing nameref
+	     variable, don't follow the nameref chain at all and just search
+	     for a nameref at the current context.  If we have a nameref,
+	     modify its value (changing which variable it references). */
+#endif
+	  if (var == 0 && (flags_on & att_nameref))
+	    {
+	      /* See if we are trying to modify an existing nameref variable,
+		 but don't follow the nameref chain. */
+	      var = mkglobal ? find_global_variable_noref (name) : find_variable_noref (name);
+	      if (var && nameref_p (var) == 0)
+		var = 0;
+	    }
+	  /* However, if we're turning off the nameref attribute on an existing
+	     nameref variable, we first follow the nameref chain to the end,
+	     modify the value of the variable this nameref variable references
+	     if there is an assignment statement argument,
+	     *CHANGING ITS VALUE AS A SIDE EFFECT*, then turn off the nameref
+	     flag *LEAVING THE NAMEREF VARIABLE'S VALUE UNCHANGED* */
+	  else if (var == 0 && (flags_off & att_nameref))
+	    {
+	      /* See if we are trying to modify an existing nameref variable */
+	      refvar = mkglobal ? find_global_variable_last_nameref (name, 0) : find_variable_last_nameref (name, 0);
+	      if (refvar && nameref_p (refvar) == 0)
+		refvar = 0;
+	      /* If the nameref is readonly but doesn't have a value, ksh93
+		 allows the nameref attribute to be removed.  If it's readonly
+		 and has a value, even if the value doesn't reference an
+		 existing variable, we disallow the modification */
+	      if (refvar && nameref_cell (refvar) && readonly_p (refvar))
+		{
+		  sh_readonly (name);
+		  any_failed++;
+		  NEXT_VARIABLE ();
+		}
+
+	      /* If all we're doing is turning off the nameref attribute, don't
+		 bother with VAR at all, whether it exists or not. Just turn it
+		 off and go on. */
+	      if (refvar && flags_on == 0 && offset == 0 && (flags_off & ~att_nameref) == 0)
+		{
+		  VUNSETATTR (refvar, att_nameref);
+		  NEXT_VARIABLE ();
+		}
+
+	      if (refvar)
+		/* XXX - use declare_find_variable here? */
+		var = mkglobal ? find_global_variable (nameref_cell (refvar)) : find_variable (nameref_cell (refvar));
+	    }
+#if defined (ARRAY_VARS)
+	  /* If we have an array assignment to a nameref, remove the nameref
+	     attribute and go on. */
+	  else if (var == 0 && offset && array_subscript_assignment)
+	    {
+	      var = mkglobal ? find_global_variable_noref (name) : find_variable_noref (name);
+	      if (var && nameref_p (var))
+		{
+		  internal_warning (_("%s: removing nameref attribute"), name);
+		  FREE (value_cell (var));		/* XXX - bash-4.3 compat */
+		  var_setvalue (var, (char *)NULL);
+		  VUNSETATTR (var, att_nameref);
+		}
+	    }
+#endif
+
+	  /* See if we are trying to set flags or value (or create) for an
+	     existing nameref that points to a non-existent variable: e.g.,
+		declare -n foo=bar
+		unset foo	# unsets bar
+		declare -i foo
+		foo=4+4
+		declare -p foo */
+	  if (var == 0 && (mkglobal || flags_on || flags_off || offset))
+	    {
+	      refvar = mkglobal ? find_global_variable_last_nameref (name, 0) : find_variable_last_nameref (name, 0);
+	      if (refvar && nameref_p (refvar) == 0)
+		refvar = 0;
+	      if (refvar)
+		/* XXX - use declare_find_variable here? */
+		var = mkglobal ? find_global_variable (nameref_cell (refvar)) : find_variable (nameref_cell (refvar));
+	      if (refvar && var == 0)
+		{
+		  oldname = name;	/* need to free this */
+
+		  namelen = strlen (nameref_cell (refvar));
+#if defined (ARRAY_VARS)
+		  if (subscript_start)
+		    {
+		      *subscript_start = '[';		/*]*/
+		      namelen +=  strlen (subscript_start);
+		    }
+#endif
+		  name = xmalloc (namelen + 2 + strlen (value) + 1);
+		  strcpy (name, nameref_cell (refvar));
+#if defined (ARRAY_VARS)
+		  if (subscript_start)
+		    strcpy (name + strlen (nameref_cell (refvar)), subscript_start);
+#endif
+		  /* We are committed to using the new name, so reset */
+		  if (offset)
+		    {
+		      /* Rebuild assignment and restore offset and value */
+		      if (aflags & ASS_APPEND)
+			name[namelen++] = '+';
+		      name[namelen++] = '=';
+		      if (value && *value)
+			strcpy (name + namelen, value);
+		      else
+			name[namelen] = '\0';
+		      offset = assignment (name, 0);
+		      /* if offset was valid previously, but the substituting
+			 of the nameref value results in an invalid assignment,
+			 throw an invalid identifier error */
+		      if (offset == 0)
+			{
+			  free (oldname);
+			  sh_invalidid (name);
+			  assign_error++;
+			  NEXT_VARIABLE ();
+			}
+		      name[offset] = '\0';
+		      value = name + namelen;
+		    }
+		  free (oldname);
+
+		  /* OK, let's turn off the nameref attribute.
+		     Now everything else applies to VAR. */
+		  if (flags_off & att_nameref)
+		    VUNSETATTR (refvar, att_nameref);
+
+		  goto restart_new_var_name;
+		  /* NOTREACHED */
+		}
+	    }
+	  if (var == 0)
+	    var = declare_find_variable (name, mkglobal, chklocal);
+
+#if defined (ARRAY_VARS)
+	  var_exists = var != 0;
+	  array_exists = var && (array_p (var) || assoc_p (var));
+	  creating_array = flags_on & (att_array|att_assoc);
+#endif
+
+	  if (var == 0)
+	    {
+#if defined (ARRAY_VARS)
+	      if (flags_on & att_assoc)
+		{
+		  var = make_new_assoc_variable (name);
+		  if (var && offset == 0)
+		    VSETATTR (var, att_invisible);
+		}
+	      else if ((flags_on & att_array) || making_array_special)
+		{
+		  var = make_new_array_variable (name);
+		  if (var && offset == 0)
+		    VSETATTR (var, att_invisible);
+		}
+	      else
+#endif
+		{
+		  var = mkglobal ? bind_global_variable (name, (char *)NULL, ASS_FORCE) : bind_variable (name, (char *)NULL, ASS_FORCE);
+		  if (var && offset == 0)
+		    VSETATTR (var, att_invisible);
+		}
+	      if (var == 0)
+		{
+		  /* Has to appear in brackets */
+		  NEXT_VARIABLE ();
+		}
+	      created_var = 1;
+	    }
+	  /* Can't take an existing array variable and make it a nameref */
+	  else if ((array_p (var) || assoc_p (var)) && (flags_on & att_nameref))
+	    {
+	      builtin_error (_("%s: reference variable cannot be an array"), name);
+	      assign_error++;
+	      NEXT_VARIABLE ();
+	    }
+	  else if (nameref_p (var) && (flags_on & att_nameref) == 0 && (flags_off & att_nameref) == 0 && offset && valid_nameref_value (value, 1) == 0)
+	    {
+	      builtin_error (_("`%s': invalid variable name for name reference"), value);
+	      any_failed++;
+	      NEXT_VARIABLE ();
+	    }
+	  else if (flags_on & att_nameref)
+	    {
+#if 1
+	      /* Check of offset is to allow an assignment to a nameref var as
+		 part of the declare word to override existing value */
+	      if (nameref_p (var) == 0 && var_isset (var) && offset == 0 && valid_nameref_value (value_cell (var), 0) == 0)
+		{
+		  builtin_error (_("`%s': invalid variable name for name reference"), value_cell (var));
+		  any_failed++;
+		  NEXT_VARIABLE ();
+		}
+#endif
+	      if (readonly_p (var))
+		{
+		  sh_readonly (name);
+		  any_failed++;
+		  NEXT_VARIABLE ();
+		}
+	      /* ksh93 compat: turning on nameref attribute turns off -ilu */
+	      VUNSETATTR (var, att_integer|att_uppercase|att_lowercase|att_capcase);
+	    }
+
+	  /* Cannot use declare +r to turn off readonly attribute. */ 
+	  if (readonly_p (var) && (flags_off & att_readonly))
+	    {
+	      sh_readonly (name_cell (var));
+	      any_failed++;
+	      NEXT_VARIABLE ();
+	    }
+
+	  /* Cannot use declare to assign value to readonly or noassign
+	     variable. */
+	  if ((readonly_p (var) || noassign_p (var)) && offset)
+	    {
+	      if (readonly_p (var))
+		sh_readonly (name);
+	      assign_error++;
+	      NEXT_VARIABLE ();
+	    }
+
+#if defined (ARRAY_VARS)
+	  /* make declare a[2]=foo as similar to a[2]=foo as possible if
+	     a is already an array or assoc variable. */
+	  if (array_subscript_assignment && array_exists && creating_array == 0)
+	    simple_array_assign = 1;
+	  else if ((making_array_special || creating_array || array_exists) && offset)
+	    {
+	      int vlen;
+	      vlen = STRLEN (value);
+/*itrace("declare_builtin: name = %s value = %s flags = %d", name, value, wflags);*/
+	      if (shell_compatibility_level > 43 && (wflags & W_COMPASSIGN) == 0 &&
+			value[0] == '(' && value[vlen-1] == ')')
+		{
+		  /* The warning is only printed when using compound assignment
+		     to an array variable that doesn't already exist.  We use
+		     creating_array to allow things like
+		     declare -a foo$bar='(abc)' to work. */		     
+		  if (array_exists == 0 && creating_array == 0)
+		    internal_warning (_("%s: quoted compound array assignment deprecated"), list->word->word);
+		  compound_array_assign = array_exists || creating_array;
+		  simple_array_assign = making_array_special;
+		}
+	      else if (value[0] == '(' && value[vlen-1] == ')' && (shell_compatibility_level < 44 || (wflags & W_COMPASSIGN)))
+		compound_array_assign = 1;
+	      else
+		simple_array_assign = 1;
+	    }
+
+	  /* Cannot use declare +a name or declare +A name to remove an
+	     array variable. */
+	  if (((flags_off & att_array) && array_p (var)) || ((flags_off & att_assoc) && assoc_p (var)))
+	    {
+	      builtin_error (_("%s: cannot destroy array variables in this way"), name);
+	      any_failed++;
+	      NEXT_VARIABLE ();
+	    }
+
+	  if ((flags_on & att_array) && assoc_p (var))
+	    {
+	      builtin_error (_("%s: cannot convert associative to indexed array"), name);
+	      any_failed++;
+	      NEXT_VARIABLE ();
+	    }
+	  if ((flags_on & att_assoc) && array_p (var))
+	    {
+	      builtin_error (_("%s: cannot convert indexed to associative array"), name);
+	      any_failed++;
+	      NEXT_VARIABLE ();
+	    }
+
+	  /* declare -A name[[n]] makes name an associative array variable. */
+	  if (flags_on & att_assoc)
+	    {
+	      if (assoc_p (var) == 0)
+		var = convert_var_to_assoc (var);
+	    }
+	  /* 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 && assoc_p (var) == 0)
+	    var = convert_var_to_array (var);
+#endif /* ARRAY_VARS */
+
+	  /* XXX - we note that we are turning on nameref attribute and defer
+	     setting it until the assignment has been made so we don't do an
+	     inadvertent nameref lookup.  Might have to do the same thing for
+	     flags_off&att_nameref. */
+	  /* XXX - ksh93 makes it an error to set a readonly nameref variable
+	     using a single typeset command. */
+	  onref = (flags_on & att_nameref);
+	  flags_on &= ~att_nameref;
+#if defined (ARRAY_VARS)
+	  if (array_p (var) || assoc_p (var)
+		|| (offset && compound_array_assign)
+		|| simple_array_assign)
+	    onref = 0;		/* array variables may not be namerefs */
+#endif
+
+	  /* ksh93 seems to do this */
+	  offref = (flags_off & att_nameref);
+	  flags_off &= ~att_nameref;
+
+	  VSETATTR (var, flags_on);
+	  VUNSETATTR (var, flags_off);
+
+#if defined (ARRAY_VARS)
+	  if (offset && compound_array_assign)
+	    assign_array_var_from_string (var, value, aflags|ASS_FORCE);
+	  else if (simple_array_assign && subscript_start)
+	    {
+	      int local_aflags;
+	      /* declare [-aA] name[N]=value */
+	      *subscript_start = '[';	/* ] */
+	      /* XXX - problem here with appending */
+	      local_aflags = aflags&ASS_APPEND;
+	      local_aflags |= assoc_noexpand ? ASS_NOEXPAND : 0;
+	      var = assign_array_element (name, value, local_aflags);	/* XXX - not aflags */
+	      *subscript_start = '\0';
+	      if (var == 0)	/* some kind of assignment error */
+		{
+		  assign_error++;
+		  flags_on |= onref;
+		  flags_off |= offref;
+		  NEXT_VARIABLE ();
+		}
+	    }
+	  else if (simple_array_assign)
+	    {
+	      /* let bind_{array,assoc}_variable take care of this. */
+	      if (assoc_p (var))
+		bind_assoc_variable (var, name, savestring ("0"), value, aflags|ASS_FORCE);
+	      else
+		bind_array_variable (name, 0, value, aflags|ASS_FORCE);
+	    }
+	  else
+#endif
+	  /* XXX - no ASS_FORCE here */
+	  /* bind_variable_value duplicates the essential internals of
+	     bind_variable() */
+	  if (offset)
+	    {
+	      if (onref || nameref_p (var))
+		aflags |= ASS_NAMEREF;
+	      v = bind_variable_value (var, value, aflags);
+	      if (v == 0 && (onref || nameref_p (var)))
+		{
+		  if (valid_nameref_value (value, 1) == 0)
+		    sh_invalidid (value);
+		  assign_error++;
+		  /* XXX - unset this variable? or leave it as normal var? */
+		  if (created_var)
+		    delete_var (var->name, mkglobal ? global_variables : shell_variables);
+		  flags_on |= onref;		/* undo change from above */
+		  flags_off |= offref;
+		  NEXT_VARIABLE ();
+		}
+	    }
+
+	  /* If we found this variable in the temporary environment, as with
+	     `var=value declare -x var', make sure it is treated identically
+	     to `var=value export var'.  Do the same for `declare -r' and
+	     `readonly'.  Preserve the attributes, except for att_tempvar. */
+	  /* XXX -- should this create a variable in the global scope, or
+	     modify the local variable flags?  ksh93 has it modify the
+	     global scope.
+	     Need to handle case like in set_var_attribute where a temporary
+	     variable is in the same table as the function local vars. */
+	  if ((flags_on & (att_exported|att_readonly)) && tempvar_p (var))
+	    {
+	      SHELL_VAR *tv;
+	      char *tvalue;
+
+	      tv = find_tempenv_variable (var->name);
+	      if (tv)
+		{
+		  tvalue = var_isset (var) ? savestring (value_cell (var)) : savestring ("");
+	          tv = bind_variable (var->name, tvalue, 0);
+		  if (tv)
+		    {
+		      tv->attributes |= var->attributes & ~att_tempvar;
+		      if (tv->context > 0)
+			VSETATTR (tv, att_propagate);
+		    }
+	          free (tvalue);
+		}
+	      VSETATTR (var, att_propagate);
+	    }
+	}
+
+      /* Turn on nameref attribute we deferred above. */
+      /* XXX - should we turn on the noassign attribute for consistency with
+	 ksh93 when we turn on the nameref attribute? */
+      VSETATTR (var, onref);
+      flags_on |= onref;
+      VUNSETATTR (var, offref);
+      flags_off |= offref;
+      /* Yuck.  ksh93 compatibility.  XXX - need to investigate more but
+	 definitely happens when turning off nameref attribute on nameref
+	 (see comments above).  Under no circumstances allow this to turn
+	 off readonly attribute on readonly nameref variable. */
+      if (refvar)
+	{
+	  if (flags_off & att_readonly)
+	    flags_off &= ~att_readonly;
+ 	  VUNSETATTR (refvar, flags_off);
+	}
+
+      stupidly_hack_special_variables (name);
+
+      NEXT_VARIABLE ();
+    }
+
+  return (assign_error ? EX_BADASSIGN
+		       : ((any_failed == 0) ? EXECUTION_SUCCESS
+  					    : EXECUTION_FAILURE));
+}
-- 
cgit v1.2.3

