initial import from bash_3.1dfsg.orig.tar.gz

1 files changed, 441 insertions, 0 deletions

diff --git a/builtins/setattr.def b/builtins/setattr.def
new file mode 100644
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--- /dev/null
+++ b/builtins/setattr.def
@@ -0,0 +1,441 @@
+This file is setattr.def, from which is created setattr.c.
+It implements the builtins "export" and "readonly", in Bash.
+
+Copyright (C) 1987-2004 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 2, 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; see the file COPYING.  If not, write to the Free Software
+Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA.
+
+$PRODUCES setattr.c
+
+#include <config.h>
+
+#if defined (HAVE_UNISTD_H)
+#  ifdef _MINIX
+#    include <sys/types.h>
+#  endif
+#  include <unistd.h>
+#endif
+
+#include <stdio.h>
+#include "../bashansi.h"
+#include "../bashintl.h"
+
+#include "../shell.h"
+#include "common.h"
+#include "bashgetopt.h"
+
+extern int posixly_correct;
+extern int array_needs_making;
+extern char *this_command_name;
+extern sh_builtin_func_t *this_shell_builtin;
+
+#ifdef ARRAY_VARS
+extern int declare_builtin __P((WORD_LIST *));
+#endif
+
+#define READONLY_OR_EXPORT \
+  (this_shell_builtin == readonly_builtin || this_shell_builtin == export_builtin)
+
+$BUILTIN export
+$FUNCTION export_builtin
+$SHORT_DOC export [-nf] [name[=value] ...] or export -p
+NAMEs are marked for automatic export to the environment of
+subsequently executed commands.  If the -f option is given,
+the NAMEs refer to functions.  If no NAMEs are given, or if `-p'
+is given, a list of all names that are exported in this shell is
+printed.  An argument of `-n' says to remove the export property
+from subsequent NAMEs.  An argument of `--' disables further option
+processing.
+$END
+
+/* For each variable name in LIST, make that variable appear in the
+   environment passed to simple commands.  If there is no LIST, then
+   print all such variables.  An argument of `-n' says to remove the
+   exported attribute from variables named in LIST.  An argument of
+  -f indicates that the names present in LIST refer to functions. */
+int
+export_builtin (list)
+     register WORD_LIST *list;
+{
+  return (set_or_show_attributes (list, att_exported, 0));
+}
+
+$BUILTIN readonly
+$FUNCTION readonly_builtin
+$SHORT_DOC readonly [-af] [name[=value] ...] or readonly -p
+The given NAMEs are marked readonly and the values of these NAMEs may
+not be changed by subsequent assignment.  If the -f option is given,
+then functions corresponding to the NAMEs are so marked.  If no
+arguments are given, or if `-p' is given, a list of all readonly names
+is printed.  The `-a' option means to treat each NAME as
+an array variable.  An argument of `--' disables further option
+processing.
+$END
+
+/* For each variable name in LIST, make that variable readonly.  Given an
+   empty LIST, print out all existing readonly variables. */
+int
+readonly_builtin (list)
+     register WORD_LIST *list;
+{
+  return (set_or_show_attributes (list, att_readonly, 0));
+}
+
+#if defined (ARRAY_VARS)
+#  define ATTROPTS	"afnp"
+#else
+#  define ATTROPTS	"fnp"
+#endif
+
+/* For each variable name in LIST, make that variable have the specified
+   ATTRIBUTE.  An arg of `-n' says to remove the attribute from the the
+   remaining names in LIST (doesn't work for readonly). */
+int
+set_or_show_attributes (list, attribute, nodefs)
+     register WORD_LIST *list;
+     int attribute, nodefs;
+{
+  register SHELL_VAR *var;
+  int assign, undo, functions_only, arrays_only, any_failed, assign_error, opt;
+  int aflags;
+  char *name;
+#if defined (ARRAY_VARS)
+  WORD_LIST *nlist, *tlist;
+  WORD_DESC *w;
+#endif
+
+  undo = functions_only = arrays_only = any_failed = assign_error = 0;
+  /* Read arguments from the front of the list. */
+  reset_internal_getopt ();
+  while ((opt = internal_getopt (list, ATTROPTS)) != -1)
+    {
+      switch (opt)
+	{
+	  case 'n':
+	    undo = 1;
+	    break;
+	  case 'f':
+	    functions_only = 1;
+	    break;
+#if defined (ARRAY_VARS)
+	  case 'a':
+	     arrays_only = 1;
+	     break;
+#endif
+	  case 'p':
+	    break;
+	  default:
+	    builtin_usage ();
+	    return (EX_USAGE);
+	}
+    }
+  list = loptend;
+
+  if (list)
+    {
+      if (attribute & att_exported)
+	array_needs_making = 1;
+
+      /* Cannot undo readonly status, silently disallowed. */
+      if (undo && (attribute & att_readonly))
+	attribute &= ~att_readonly;
+
+      while (list)
+	{
+	  name = list->word->word;
+
+	  if (functions_only)		/* xxx -f name */
+	    {
+	      var = find_function (name);
+	      if (var == 0)
+		{
+		  builtin_error (_("%s: not a function"), name);
+		  any_failed++;
+		}
+	      else
+		SETVARATTR (var, attribute, undo);
+
+	      list = list->next;
+	      continue;
+	    }
+
+	  /* xxx [-np] name[=value] */
+	  assign = assignment (name, 0);
+
+	  aflags = 0;
+	  if (assign)
+	    {
+	      name[assign] = '\0';
+	      if (name[assign - 1] == '+')
+		{
+		  aflags |= ASS_APPEND;
+		  name[assign - 1] = '\0';
+		}
+	    }
+
+	  if (legal_identifier (name) == 0)
+	    {
+	      sh_invalidid (name);
+	      if (assign)
+		assign_error++;
+	      else
+		any_failed++;
+	      list = list->next;
+	      continue;
+	    }
+
+	  if (assign)	/* xxx [-np] name=value */
+	    {
+	      name[assign] = '=';
+	      if (aflags & ASS_APPEND)
+		name[assign - 1] = '+';
+#if defined (ARRAY_VARS)
+	      /* Let's try something here.  Turn readonly -a xxx=yyy into
+		 declare -ra xxx=yyy and see what that gets us. */
+	      if (arrays_only)
+		{
+		  tlist = list->next;
+		  list->next = (WORD_LIST *)NULL;
+		  w = make_word ("-ra");
+		  nlist = make_word_list (w, list);
+		  opt = declare_builtin (nlist);
+		  if (opt != EXECUTION_SUCCESS)
+		    assign_error++;
+		  list->next = tlist;
+		  dispose_word (w);
+		  free (nlist);
+		}
+	      else
+#endif
+	      /* This word has already been expanded once with command
+		 and parameter expansion.  Call do_assignment_no_expand (),
+		 which does not do command or parameter substitution.  If
+		 the assignment is not performed correctly, flag an error. */
+	      if (do_assignment_no_expand (name) == 0)
+		assign_error++;
+	      name[assign] = '\0';
+	      if (aflags & ASS_APPEND)
+		name[assign - 1] = '\0';
+	    }
+
+	  set_var_attribute (name, attribute, undo);
+	  list = list->next;
+	}
+    }
+  else
+    {
+      SHELL_VAR **variable_list;
+      register int i;
+
+      if ((attribute & att_function) || functions_only)
+	{
+	  variable_list = all_shell_functions ();
+	  if (attribute != att_function)
+	    attribute &= ~att_function;	/* so declare -xf works, for example */
+	}
+      else
+	variable_list = all_shell_variables ();
+
+#if defined (ARRAY_VARS)
+      if (attribute & att_array)
+	{
+	  arrays_only++;
+	  if (attribute != att_array)
+	    attribute &= ~att_array;
+	}
+#endif
+
+      if (variable_list)
+	{
+	  for (i = 0; var = variable_list[i]; i++)
+	    {
+#if defined (ARRAY_VARS)
+	      if (arrays_only && array_p (var) == 0)
+		continue;
+#endif
+	      if ((var->attributes & attribute))
+		show_var_attributes (var, READONLY_OR_EXPORT, nodefs);
+	    }
+	  free (variable_list);
+	}
+    }
+
+  return (assign_error ? EX_BADASSIGN
+		       : ((any_failed == 0) ? EXECUTION_SUCCESS
+  					    : EXECUTION_FAILURE));
+}
+
+/* Show the attributes for shell variable VAR.  If NODEFS is non-zero,
+   don't show function definitions along with the name.  If PATTR is
+   non-zero, it indicates we're being called from `export' or `readonly'.
+   In POSIX mode, this prints the name of the calling builtin (`export'
+   or `readonly') instead of `declare', and doesn't print function defs
+   when called by `export' or `readonly'. */
+int
+show_var_attributes (var, pattr, nodefs)
+     SHELL_VAR *var;
+     int pattr, nodefs;
+{
+  char flags[8], *x;
+  int i;
+
+  i = 0;
+
+  /* pattr == 0 means we are called from `declare'. */
+  if (pattr == 0 || posixly_correct == 0)
+    {
+#if defined (ARRAY_VARS)
+      if (array_p (var))
+	flags[i++] = 'a';
+#endif
+
+      if (function_p (var))
+	flags[i++] = 'f';
+
+      if (integer_p (var))
+	flags[i++] = 'i';
+
+      if (readonly_p (var))
+	flags[i++] = 'r';
+
+      if (trace_p (var))
+	flags[i++] = 't';
+
+      if (exported_p (var))
+	flags[i++] = 'x';
+    }
+  else
+    {
+#if defined (ARRAY_VARS)
+      if (array_p (var))
+	flags[i++] = 'a';
+#endif
+
+      if (function_p (var))
+	flags[i++] = 'f';
+    }
+
+  flags[i] = '\0';
+
+  /* If we're printing functions with definitions, print the function def
+     first, then the attributes, instead of printing output that can't be
+     reused as input to recreate the current state. */
+  if (function_p (var) && nodefs == 0 && (pattr == 0 || posixly_correct == 0))
+    {
+      printf ("%s\n", named_function_string (var->name, function_cell (var), 1));
+      nodefs++;
+      if (pattr == 0 && i == 1 && flags[0] == 'f')
+	return 0;		/* don't print `declare -f name' */
+    }
+
+  if (pattr == 0 || posixly_correct == 0)
+    printf ("declare -%s ", i ? flags : "-");
+  else if (i)
+    printf ("%s -%s ", this_command_name, flags);
+  else
+    printf ("%s ", this_command_name);
+
+#if defined (ARRAY_VARS)
+ if (array_p (var))
+    print_array_assignment (var, 1);
+  else
+#endif
+  /* force `readonly' and `export' to not print out function definitions
+     when in POSIX mode. */
+  if (nodefs || (function_p (var) && pattr != 0 && posixly_correct))
+    printf ("%s\n", var->name);
+  else if (function_p (var))
+    printf ("%s\n", named_function_string (var->name, function_cell (var), 1));
+  else if (invisible_p (var))
+    printf ("%s\n", var->name);
+  else
+    {
+      x = sh_double_quote (var_isset (var) ? value_cell (var) : "");
+      printf ("%s=%s\n", var->name, x);
+      free (x);
+    }
+  return (0);
+}
+
+int
+show_name_attributes (name, nodefs)
+     char *name;
+     int nodefs;
+{
+  SHELL_VAR *var;
+
+  var = find_variable_internal (name, 1);
+
+  if (var && invisible_p (var) == 0)
+    {
+      show_var_attributes (var, READONLY_OR_EXPORT, nodefs);
+      return (0);
+    }
+  else
+    return (1);
+}
+
+void
+set_var_attribute (name, attribute, undo)
+     char *name;
+     int attribute, undo;
+{
+  SHELL_VAR *var, *tv;
+  char *tvalue;
+
+  if (undo)
+    var = find_variable (name);
+  else
+    {
+      tv = find_tempenv_variable (name);
+      /* XXX -- need to handle case where tv is a temp variable in a
+	 function-scope context, since function_env has been merged into
+	 the local variables table. */
+      if (tv && tempvar_p (tv))
+	{
+	  tvalue = var_isset (tv) ? savestring (value_cell (tv)) : savestring ("");
+
+	  var = bind_variable (tv->name, tvalue, 0);
+	  var->attributes |= tv->attributes & ~att_tempvar;
+	  VSETATTR (tv, att_propagate);
+	  if (var->context != 0)
+	    VSETATTR (var, att_propagate);
+	  SETVARATTR (tv, attribute, undo);	/* XXX */
+
+	  stupidly_hack_special_variables (tv->name);
+
+	  free (tvalue);
+	}
+      else
+	{
+	  var = find_variable_internal (name, 0);
+	  if (var == 0)
+	    {
+	      var = bind_variable (name, (char *)NULL, 0);
+	      VSETATTR (var, att_invisible);
+	    }
+	  else if (var->context != 0)
+	    VSETATTR (var, att_propagate);
+	}
+    }
+
+  if (var)
+    SETVARATTR (var, attribute, undo);
+
+  if (var && (exported_p (var) || (attribute & att_exported)))
+    array_needs_making++;	/* XXX */
+}