Adding upstream version 5.1.upstream/5.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 899 insertions, 0 deletions

diff --git a/builtins/shopt.def b/builtins/shopt.def
new file mode 100644
index 0000000..6dca224
--- /dev/null
+++ b/builtins/shopt.def
@@ -0,0 +1,899 @@
+This file is shopt.def, from which is created shopt.c.
+It implements the Bash `shopt' builtin.
+
+Copyright (C) 1994-2020 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/>.
+
+$PRODUCES shopt.c
+
+$BUILTIN shopt
+$FUNCTION shopt_builtin
+$SHORT_DOC shopt [-pqsu] [-o] [optname ...]
+Set and unset shell options.
+
+Change the setting of each shell option OPTNAME.  Without any option
+arguments, list each supplied OPTNAME, or all shell options if no
+OPTNAMEs are given, with an indication of whether or not each is set.
+
+Options:
+  -o	restrict OPTNAMEs to those defined for use with `set -o'
+  -p	print each shell option with an indication of its status
+  -q	suppress output
+  -s	enable (set) each OPTNAME
+  -u	disable (unset) each OPTNAME
+
+Exit Status:
+Returns success if OPTNAME is enabled; fails if an invalid option is
+given or OPTNAME is disabled.
+$END
+
+#include <config.h>
+
+#if defined (HAVE_UNISTD_H)
+#  ifdef _MINIX
+#    include <sys/types.h>
+#  endif
+#  include <unistd.h>
+#endif
+
+#include <stdio.h>
+
+#include "version.h"
+
+#include "../bashintl.h"
+
+#include "../shell.h"
+#include "../flags.h"
+#include "common.h"
+#include "bashgetopt.h"
+
+#if defined (READLINE)
+#  include "../bashline.h"
+#endif
+
+#if defined (HISTORY)
+#  include "../bashhist.h"
+#endif
+
+#define UNSETOPT	0
+#define SETOPT		1
+
+#define OPTFMT		"%-15s\t%s\n"
+
+extern int allow_null_glob_expansion, fail_glob_expansion, glob_dot_filenames;
+extern int cdable_vars, mail_warning, source_uses_path;
+extern int no_exit_on_failed_exec, print_shift_error;
+extern int check_hashed_filenames, promptvars;
+extern int cdspelling, expand_aliases;
+extern int extended_quote;
+extern int check_window_size;
+extern int glob_ignore_case, match_ignore_case;
+extern int hup_on_exit;
+extern int xpg_echo;
+extern int gnu_error_format;
+extern int check_jobs_at_exit;
+extern int autocd;
+extern int glob_star;
+extern int glob_asciirange;
+extern int lastpipe_opt;
+extern int inherit_errexit;
+extern int localvar_inherit;
+extern int localvar_unset;
+
+#if defined (EXTENDED_GLOB)
+extern int extended_glob;
+#endif
+
+#if defined (READLINE)
+extern int hist_verify, history_reediting, perform_hostname_completion;
+extern int no_empty_command_completion;
+extern int force_fignore;
+extern int dircomplete_spelling, dircomplete_expand;
+extern int complete_fullquote;
+
+extern int enable_hostname_completion PARAMS((int));
+#endif
+
+#if defined (PROGRAMMABLE_COMPLETION)
+extern int prog_completion_enabled;
+extern int progcomp_alias;
+#endif
+
+#if defined (DEBUGGER)
+extern int debugging_mode;
+#endif
+
+#if defined (ARRAY_VARS)
+extern int assoc_expand_once;
+extern int array_expand_once;
+#endif
+
+#if defined (SYSLOG_HISTORY)
+extern int syslog_history;
+#endif
+
+static void shopt_error PARAMS((char *));
+
+static int set_shellopts_after_change PARAMS((char *, int));
+static int set_compatibility_level PARAMS((char *, int));
+
+#if defined (RESTRICTED_SHELL)
+static int set_restricted_shell PARAMS((char *, int));
+#endif
+
+#if defined (READLINE)
+static int shopt_enable_hostname_completion PARAMS((char *, int));
+static int shopt_set_complete_direxpand PARAMS((char *, int));
+#endif
+
+static int shopt_set_debug_mode PARAMS((char *, int));
+
+static int shopt_login_shell;
+static int shopt_compat31;
+static int shopt_compat32;
+static int shopt_compat40;
+static int shopt_compat41;
+static int shopt_compat42;
+static int shopt_compat43;
+static int shopt_compat44;
+
+typedef int shopt_set_func_t PARAMS((char *, int));
+
+/* If you add a new variable name here, make sure to set the default value
+   appropriately in reset_shopt_options. */
+
+static struct {
+  char *name;
+  int  *value;
+  shopt_set_func_t *set_func;
+} shopt_vars[] = {
+  { "autocd", &autocd, (shopt_set_func_t *)NULL },
+#if defined (ARRAY_VARS)
+  { "assoc_expand_once", &assoc_expand_once, (shopt_set_func_t *)NULL },
+#endif
+  { "cdable_vars", &cdable_vars, (shopt_set_func_t *)NULL },
+  { "cdspell", &cdspelling, (shopt_set_func_t *)NULL },
+  { "checkhash", &check_hashed_filenames, (shopt_set_func_t *)NULL },
+#if defined (JOB_CONTROL)
+  { "checkjobs", &check_jobs_at_exit, (shopt_set_func_t *)NULL },
+#endif
+  { "checkwinsize", &check_window_size, (shopt_set_func_t *)NULL },
+#if defined (HISTORY)
+  { "cmdhist", &command_oriented_history, (shopt_set_func_t *)NULL },
+#endif
+  { "compat31", &shopt_compat31, set_compatibility_level },
+  { "compat32", &shopt_compat32, set_compatibility_level },
+  { "compat40", &shopt_compat40, set_compatibility_level },
+  { "compat41", &shopt_compat41, set_compatibility_level },
+  { "compat42", &shopt_compat42, set_compatibility_level },
+  { "compat43", &shopt_compat43, set_compatibility_level },
+  { "compat44", &shopt_compat44, set_compatibility_level },
+#if defined (READLINE)
+  { "complete_fullquote", &complete_fullquote, (shopt_set_func_t *)NULL},
+  { "direxpand", &dircomplete_expand, shopt_set_complete_direxpand },
+  { "dirspell", &dircomplete_spelling, (shopt_set_func_t *)NULL },
+#endif
+  { "dotglob", &glob_dot_filenames, (shopt_set_func_t *)NULL },
+  { "execfail", &no_exit_on_failed_exec, (shopt_set_func_t *)NULL },
+  { "expand_aliases", &expand_aliases, (shopt_set_func_t *)NULL },
+#if defined (DEBUGGER)
+  { "extdebug", &debugging_mode, shopt_set_debug_mode },
+#endif
+#if defined (EXTENDED_GLOB)
+  { "extglob", &extended_glob, (shopt_set_func_t *)NULL },
+#endif
+  { "extquote", &extended_quote, (shopt_set_func_t *)NULL },
+  { "failglob", &fail_glob_expansion, (shopt_set_func_t *)NULL },
+#if defined (READLINE)
+  { "force_fignore", &force_fignore, (shopt_set_func_t *)NULL },
+#endif
+  { "globasciiranges", &glob_asciirange, (shopt_set_func_t *)NULL },
+  { "globstar", &glob_star, (shopt_set_func_t *)NULL },
+  { "gnu_errfmt", &gnu_error_format, (shopt_set_func_t *)NULL },
+#if defined (HISTORY)
+  { "histappend", &force_append_history, (shopt_set_func_t *)NULL },
+#endif
+#if defined (READLINE)
+  { "histreedit", &history_reediting, (shopt_set_func_t *)NULL },
+  { "histverify", &hist_verify, (shopt_set_func_t *)NULL },
+  { "hostcomplete", &perform_hostname_completion, shopt_enable_hostname_completion },
+#endif
+  { "huponexit", &hup_on_exit, (shopt_set_func_t *)NULL },
+  { "inherit_errexit", &inherit_errexit, (shopt_set_func_t *)NULL },
+  { "interactive_comments", &interactive_comments, set_shellopts_after_change },
+  { "lastpipe", &lastpipe_opt, (shopt_set_func_t *)NULL },
+#if defined (HISTORY)
+  { "lithist", &literal_history, (shopt_set_func_t *)NULL },
+#endif
+  { "localvar_inherit", &localvar_inherit, (shopt_set_func_t *)NULL },
+  { "localvar_unset", &localvar_unset, (shopt_set_func_t *)NULL },
+  { "login_shell", &shopt_login_shell, set_login_shell },
+  { "mailwarn", &mail_warning, (shopt_set_func_t *)NULL },
+#if defined (READLINE)
+  { "no_empty_cmd_completion", &no_empty_command_completion, (shopt_set_func_t *)NULL },
+#endif
+  { "nocaseglob", &glob_ignore_case, (shopt_set_func_t *)NULL },
+  { "nocasematch", &match_ignore_case, (shopt_set_func_t *)NULL },
+  { "nullglob",	&allow_null_glob_expansion, (shopt_set_func_t *)NULL },
+#if defined (PROGRAMMABLE_COMPLETION)
+  { "progcomp", &prog_completion_enabled, (shopt_set_func_t *)NULL },
+#  if defined (ALIAS)
+  { "progcomp_alias", &progcomp_alias, (shopt_set_func_t *)NULL },
+#  endif
+#endif
+  { "promptvars", &promptvars, (shopt_set_func_t *)NULL },
+#if defined (RESTRICTED_SHELL)
+  { "restricted_shell", &restricted_shell, set_restricted_shell },
+#endif
+  { "shift_verbose", &print_shift_error, (shopt_set_func_t *)NULL },
+  { "sourcepath", &source_uses_path, (shopt_set_func_t *)NULL },
+#if defined (SYSLOG_HISTORY) && defined (SYSLOG_SHOPT)
+  { "syslog_history", &syslog_history, (shopt_set_func_t *)NULL },
+#endif
+  { "xpg_echo", &xpg_echo, (shopt_set_func_t *)NULL },
+  { (char *)0, (int *)0, (shopt_set_func_t *)NULL }
+};
+
+#define N_SHOPT_OPTIONS		(sizeof (shopt_vars) / sizeof (shopt_vars[0]))
+
+#define GET_SHOPT_OPTION_VALUE(i)	(*shopt_vars[i].value)
+
+static const char * const on = "on";
+static const char * const off = "off";
+
+static int find_shopt PARAMS((char *));
+static int toggle_shopts PARAMS((int, WORD_LIST *, int));
+static void print_shopt PARAMS((char *, int, int));
+static int list_shopts PARAMS((WORD_LIST *, int));
+static int list_some_shopts PARAMS((int, int));
+static int list_shopt_o_options PARAMS((WORD_LIST *, int));
+static int list_some_o_options PARAMS((int, int));
+static int set_shopt_o_options PARAMS((int, WORD_LIST *, int));
+
+#define SFLAG	0x01
+#define UFLAG	0x02
+#define QFLAG	0x04
+#define OFLAG	0x08
+#define PFLAG	0x10
+
+int
+shopt_builtin (list)
+     WORD_LIST *list;
+{
+  int opt, flags, rval;
+
+  flags = 0;
+  reset_internal_getopt ();
+  while ((opt = internal_getopt (list, "psuoq")) != -1)
+    {
+      switch (opt)
+	{
+	case 's':
+	  flags |= SFLAG;
+	  break;
+	case 'u':
+	  flags |= UFLAG;
+	  break;
+	case 'q':
+	  flags |= QFLAG;
+	  break;
+	case 'o':
+	  flags |= OFLAG;
+	  break;
+	case 'p':
+	  flags |= PFLAG;
+	  break;
+	CASE_HELPOPT;
+	default:
+	  builtin_usage ();
+	  return (EX_USAGE);
+	}
+    }
+  list = loptend;
+
+  if ((flags & (SFLAG|UFLAG)) == (SFLAG|UFLAG))
+    {
+      builtin_error (_("cannot set and unset shell options simultaneously"));
+      return (EXECUTION_FAILURE);
+    }
+
+  rval = EXECUTION_SUCCESS;
+  if ((flags & OFLAG) && ((flags & (SFLAG|UFLAG)) == 0))	/* shopt -o */
+    rval = list_shopt_o_options (list, flags);
+  else if (list && (flags & OFLAG))		/* shopt -so args */
+    rval = set_shopt_o_options ((flags & SFLAG) ? FLAG_ON : FLAG_OFF, list, flags & QFLAG);
+  else if (flags & OFLAG)	/* shopt -so */
+    rval = list_some_o_options ((flags & SFLAG) ? 1 : 0, flags);
+  else if (list && (flags & (SFLAG|UFLAG)))	/* shopt -su args */
+    rval = toggle_shopts ((flags & SFLAG) ? SETOPT : UNSETOPT, list, flags & QFLAG);
+  else if ((flags & (SFLAG|UFLAG)) == 0)	/* shopt [args] */
+    rval = list_shopts (list, flags);
+  else						/* shopt -su */
+    rval = list_some_shopts ((flags & SFLAG) ? SETOPT : UNSETOPT, flags);
+  return (rval);
+}
+
+/* Reset the options managed by `shopt' to the values they would have at
+   shell startup.  Variables from shopt_vars. */
+void
+reset_shopt_options ()
+{
+  autocd = cdable_vars = cdspelling = 0;
+  check_hashed_filenames = CHECKHASH_DEFAULT;
+  check_window_size = CHECKWINSIZE_DEFAULT;
+  allow_null_glob_expansion = glob_dot_filenames = 0;
+  no_exit_on_failed_exec = 0;
+  expand_aliases = 0;
+  extended_quote = 1;
+  fail_glob_expansion = 0;
+  glob_asciirange = GLOBASCII_DEFAULT;
+  glob_star = 0;
+  gnu_error_format = 0;
+  hup_on_exit = 0;
+  inherit_errexit = 0;
+  interactive_comments = 1;
+  lastpipe_opt = 0;
+  localvar_inherit = localvar_unset = 0;
+  mail_warning = 0;
+  glob_ignore_case = match_ignore_case = 0;
+  print_shift_error = 0;
+  source_uses_path = promptvars = 1;
+
+#if defined (JOB_CONTROL)
+  check_jobs_at_exit = 0;
+#endif
+
+#if defined (EXTENDED_GLOB)
+  extended_glob = EXTGLOB_DEFAULT;
+#endif
+
+#if defined (ARRAY_VARS)
+  assoc_expand_once = 0;
+#endif
+
+#if defined (HISTORY)
+  literal_history = 0;
+  force_append_history = 0;
+  command_oriented_history = 1;
+#endif
+
+#if defined (SYSLOG_HISTORY)
+#  if defined (SYSLOG_SHOPT)
+  syslog_history = SYSLOG_SHOPT;
+#  else
+  syslog_history = 1;
+#  endif /* SYSLOG_SHOPT */
+#endif
+
+#if defined (READLINE)
+  complete_fullquote = 1;
+  force_fignore = 1;
+  hist_verify = history_reediting = 0;
+  perform_hostname_completion = 1;
+#  if DIRCOMPLETE_EXPAND_DEFAULT
+  dircomplete_expand = 1;
+#  else
+  dircomplete_expand = 0;
+#endif
+  dircomplete_spelling = 0;
+  no_empty_command_completion = 0;
+#endif
+
+#if defined (PROGRAMMABLE_COMPLETION)
+  prog_completion_enabled = 1;
+#  if defined (ALIAS)
+  progcomp_alias = 0;
+#  endif
+#endif
+
+#if defined (DEFAULT_ECHO_TO_XPG) || defined (STRICT_POSIX)
+  xpg_echo = 1;
+#else
+  xpg_echo = 0;
+#endif /* DEFAULT_ECHO_TO_XPG */
+
+  shopt_login_shell = login_shell;
+}
+
+static int
+find_shopt (name)
+     char *name;
+{
+  int i;
+
+  for (i = 0; shopt_vars[i].name; i++)
+    if (STREQ (name, shopt_vars[i].name))
+      return i;
+  return -1;
+}
+
+static void
+shopt_error (s)
+     char *s;
+{
+  builtin_error (_("%s: invalid shell option name"), s);
+}
+
+static int
+toggle_shopts (mode, list, quiet)
+     int mode;
+     WORD_LIST *list;
+     int quiet;
+{
+  WORD_LIST *l;
+  int ind, rval;
+  SHELL_VAR *v;
+
+  for (l = list, rval = EXECUTION_SUCCESS; l; l = l->next)
+    {
+      ind = find_shopt (l->word->word);
+      if (ind < 0)
+	{
+	  shopt_error (l->word->word);
+	  rval = EXECUTION_FAILURE;
+	}
+      else
+	{
+	  *shopt_vars[ind].value = mode;	/* 1 for set, 0 for unset */
+	  if (shopt_vars[ind].set_func)
+	    (*shopt_vars[ind].set_func) (shopt_vars[ind].name, mode);
+	}
+    }
+
+  /* Don't set $BASHOPTS here if it hasn't already been initialized */
+  if (v = find_variable ("BASHOPTS"))
+    set_bashopts ();
+  return (rval);
+}
+
+static void
+print_shopt (name, val, flags)
+     char *name;
+     int val, flags;
+{
+  if (flags & PFLAG)
+    printf ("shopt %s %s\n", val ? "-s" : "-u", name);
+  else
+    printf (OPTFMT, name, val ? on : off);
+}
+
+/* List the values of all or any of the `shopt' options.  Returns 0 if
+   all were listed or all variables queried were on; 1 otherwise. */
+static int
+list_shopts (list, flags)
+     WORD_LIST *list;
+     int flags;
+{
+  WORD_LIST *l;
+  int i, val, rval;
+
+  if (list == 0)
+    {
+      for (i = 0; shopt_vars[i].name; i++)
+	{
+	  val = *shopt_vars[i].value;
+	  if ((flags & QFLAG) == 0)
+	    print_shopt (shopt_vars[i].name, val, flags);
+	}
+      return (sh_chkwrite (EXECUTION_SUCCESS));
+    }
+
+  for (l = list, rval = EXECUTION_SUCCESS; l; l = l->next)
+    {
+      i = find_shopt (l->word->word);
+      if (i < 0)
+	{
+	  shopt_error (l->word->word);
+	  rval = EXECUTION_FAILURE;
+	  continue;
+	}
+      val = *shopt_vars[i].value;
+      if (val == 0)
+	rval = EXECUTION_FAILURE;
+      if ((flags & QFLAG) == 0)
+	print_shopt (l->word->word, val, flags);
+    }
+
+  return (sh_chkwrite (rval));
+}
+
+static int
+list_some_shopts (mode, flags)
+     int mode, flags;
+{
+  int val, i;
+
+  for (i = 0; shopt_vars[i].name; i++)
+    {
+      val = *shopt_vars[i].value;
+      if (((flags & QFLAG) == 0) && mode == val)
+	print_shopt (shopt_vars[i].name, val, flags);
+    }
+  return (sh_chkwrite (EXECUTION_SUCCESS));
+}
+
+static int
+list_shopt_o_options (list, flags)
+     WORD_LIST *list;
+     int flags;
+{
+  WORD_LIST *l;
+  int val, rval;
+
+  if (list == 0)
+    {
+      if ((flags & QFLAG) == 0)
+	list_minus_o_opts (-1, (flags & PFLAG));
+      return (sh_chkwrite (EXECUTION_SUCCESS));
+    }
+
+  for (l = list, rval = EXECUTION_SUCCESS; l; l = l->next)
+    {
+      val = minus_o_option_value (l->word->word);
+      if (val == -1)
+	{
+	  sh_invalidoptname (l->word->word);
+	  rval = EXECUTION_FAILURE;
+	  continue;
+	}
+      if (val == 0)
+	rval = EXECUTION_FAILURE;
+      if ((flags & QFLAG) == 0)
+	{
+	  if (flags & PFLAG)
+	    printf ("set %co %s\n", val ? '-' : '+', l->word->word);
+	  else
+	    printf (OPTFMT, l->word->word, val ? on : off);
+	}
+    }
+  return (sh_chkwrite (rval));
+}
+
+static int
+list_some_o_options (mode, flags)
+     int mode, flags;
+{
+  if ((flags & QFLAG) == 0)
+    list_minus_o_opts (mode, (flags & PFLAG));
+  return (sh_chkwrite (EXECUTION_SUCCESS));
+}
+
+static int
+set_shopt_o_options (mode, list, quiet)
+     int mode;
+     WORD_LIST *list;
+     int quiet;
+{
+  WORD_LIST *l;
+  int rval;
+
+  for (l = list, rval = EXECUTION_SUCCESS; l; l = l->next)
+    {
+      if (set_minus_o_option (mode, l->word->word) == EXECUTION_FAILURE)
+	rval = EXECUTION_FAILURE;
+    }
+  set_shellopts ();
+  return rval;
+}
+
+/* If we set or unset interactive_comments with shopt, make sure the
+   change is reflected in $SHELLOPTS. */
+static int
+set_shellopts_after_change (option_name, mode)
+     char *option_name;
+     int mode;
+{
+  set_shellopts ();
+  return (0);
+}
+
+static int
+shopt_set_debug_mode (option_name, mode)
+     char *option_name;
+     int mode;
+{
+#if defined (DEBUGGER)
+  error_trace_mode = function_trace_mode = debugging_mode;
+  set_shellopts ();
+  if (debugging_mode)
+    init_bash_argv ();
+#endif
+  return (0);
+}
+
+#if defined (READLINE)
+static int
+shopt_enable_hostname_completion (option_name, mode)
+     char *option_name;
+     int mode;
+{
+  return (enable_hostname_completion (mode));
+}
+#endif
+
+static int
+set_compatibility_level (option_name, mode)
+     char *option_name;
+     int mode;
+{
+  int ind;
+  char *rhs;
+
+  /* If we're setting something, redo some of the work we did above in
+     toggle_shopt().  Unset everything and reset the appropriate option
+     based on OPTION_NAME. */
+  if (mode)
+    {
+      shopt_compat31 = shopt_compat32 = 0;
+      shopt_compat40 = shopt_compat41 = shopt_compat42 = shopt_compat43 = 0;
+      shopt_compat44 = 0;
+      ind = find_shopt (option_name);
+      *shopt_vars[ind].value = mode;
+    }
+
+  /* Then set shell_compatibility_level based on what remains */
+  if (shopt_compat31)
+    shell_compatibility_level = 31;
+  else if (shopt_compat32)
+    shell_compatibility_level = 32;
+  else if (shopt_compat40)
+    shell_compatibility_level = 40;
+  else if (shopt_compat41)
+    shell_compatibility_level = 41;
+  else if (shopt_compat42)
+    shell_compatibility_level = 42;
+  else if (shopt_compat43)
+    shell_compatibility_level = 43;
+  else if (shopt_compat44)
+    shell_compatibility_level = 44;
+  else
+    shell_compatibility_level = DEFAULT_COMPAT_LEVEL;
+
+  /* Make sure the current compatibility level is reflected in BASH_COMPAT */
+  rhs = itos (shell_compatibility_level);
+  bind_variable ("BASH_COMPAT", rhs, 0);
+  free (rhs);
+
+  return 0;
+}
+
+/* Set and unset the various compatibility options from the value of
+   shell_compatibility_level; used by sv_shcompat */
+void
+set_compatibility_opts ()
+{
+  shopt_compat31 = shopt_compat32 = 0;
+  shopt_compat40 = shopt_compat41 = shopt_compat42 = shopt_compat43 = 0;
+  shopt_compat44 = 0;
+  switch (shell_compatibility_level)
+    {
+      case DEFAULT_COMPAT_LEVEL:
+	break;
+      case 44:
+	shopt_compat44 = 1; break;
+      case 43:
+	shopt_compat43 = 1; break;
+      case 42:
+	shopt_compat42 = 1; break;
+      case 41:
+	shopt_compat41 = 1; break;
+      case 40:
+	shopt_compat40 = 1; break;
+      case 32:
+	shopt_compat32 = 1; break;
+      case 31:
+	shopt_compat31 = 1; break;
+    }
+}
+
+#if defined (READLINE)
+static int
+shopt_set_complete_direxpand (option_name, mode)
+     char *option_name;
+     int mode;
+{
+  set_directory_hook ();
+  return 0;
+}
+#endif
+
+#if defined (RESTRICTED_SHELL)
+/* Don't allow the value of restricted_shell to be modified. */
+
+static int
+set_restricted_shell (option_name, mode)
+     char *option_name;
+     int mode;
+{
+  static int save_restricted = -1;
+
+  if (save_restricted == -1)
+    save_restricted = shell_is_restricted (shell_name);
+
+  restricted_shell = save_restricted;
+  return (0);
+}
+#endif /* RESTRICTED_SHELL */
+
+/* Not static so shell.c can call it to initialize shopt_login_shell */
+int
+set_login_shell (option_name, mode)
+     char *option_name;
+     int mode;
+{
+  shopt_login_shell = login_shell != 0;
+  return (0);
+}
+
+char **
+get_shopt_options ()
+{
+  char **ret;
+  int n, i;
+
+  n = sizeof (shopt_vars) / sizeof (shopt_vars[0]);
+  ret = strvec_create (n + 1);
+  for (i = 0; shopt_vars[i].name; i++)
+    ret[i] = savestring (shopt_vars[i].name);
+  ret[i] = (char *)NULL;
+  return ret;
+}
+
+/*
+ * External interface for other parts of the shell.  NAME is a string option;
+ * MODE is 0 if we want to unset an option; 1 if we want to set an option.
+ * REUSABLE is 1 if we want to print output in a form that may be reused.
+ */
+int
+shopt_setopt (name, mode)
+     char *name;
+     int mode;
+{
+  WORD_LIST *wl;
+  int r;
+
+  wl = add_string_to_list (name, (WORD_LIST *)NULL);
+  r = toggle_shopts (mode, wl, 0);
+  dispose_words (wl);
+  return r;
+}
+
+int
+shopt_listopt (name, reusable)
+     char *name;
+     int reusable;
+{
+  int i;
+
+  if (name == 0)
+    return (list_shopts ((WORD_LIST *)NULL, reusable ? PFLAG : 0));
+
+  i = find_shopt (name);
+  if (i < 0)
+    {
+      shopt_error (name);
+      return (EXECUTION_FAILURE);
+    }
+
+  print_shopt (name, *shopt_vars[i].value, reusable ? PFLAG : 0);
+  return (sh_chkwrite (EXECUTION_SUCCESS));
+}
+
+void
+set_bashopts ()
+{
+  char *value;
+  char tflag[N_SHOPT_OPTIONS];
+  int vsize, i, vptr, *ip, exported;
+  SHELL_VAR *v;
+
+  for (vsize = i = 0; shopt_vars[i].name; i++)
+    {
+      tflag[i] = 0;
+      if (GET_SHOPT_OPTION_VALUE (i))
+	{
+	  vsize += strlen (shopt_vars[i].name) + 1;
+	  tflag[i] = 1;
+	}
+    }
+
+  value = (char *)xmalloc (vsize + 1);
+
+  for (i = vptr = 0; shopt_vars[i].name; i++)
+    {
+      if (tflag[i])
+	{
+	  strcpy (value + vptr, shopt_vars[i].name);
+	  vptr += strlen (shopt_vars[i].name);
+	  value[vptr++] = ':';
+	}
+    }
+
+  if (vptr)
+    vptr--;			/* cut off trailing colon */
+  value[vptr] = '\0';
+
+  v = find_variable ("BASHOPTS");
+
+  /* Turn off the read-only attribute so we can bind the new value, and
+     note whether or not the variable was exported. */
+  if (v)
+    {
+      VUNSETATTR (v, att_readonly);
+      exported = exported_p (v);
+    }
+  else
+    exported = 0;
+
+  v = bind_variable ("BASHOPTS", value, 0);
+
+  /* Turn the read-only attribute back on, and turn off the export attribute
+     if it was set implicitly by mark_modified_vars and SHELLOPTS was not
+     exported before we bound the new value. */
+  VSETATTR (v, att_readonly);
+  if (mark_modified_vars && exported == 0 && exported_p (v))
+    VUNSETATTR (v, att_exported);
+
+  free (value);
+}
+
+void
+parse_bashopts (value)
+     char *value;
+{
+  char *vname;
+  int vptr, ind;
+
+  vptr = 0;
+  while (vname = extract_colon_unit (value, &vptr))
+    {
+      ind = find_shopt (vname);
+      if (ind >= 0)
+	{
+          *shopt_vars[ind].value = 1;
+	  if (shopt_vars[ind].set_func)
+	    (*shopt_vars[ind].set_func) (shopt_vars[ind].name, 1);
+	}
+      free (vname);
+    }
+}
+
+void
+initialize_bashopts (no_bashopts)
+     int no_bashopts;
+{
+  char *temp;
+  SHELL_VAR *var;
+
+  if (no_bashopts == 0)
+    {
+      var = find_variable ("BASHOPTS");
+      /* set up any shell options we may have inherited. */
+      if (var && imported_p (var))
+	{
+	  temp = (array_p (var) || assoc_p (var)) ? (char *)NULL : savestring (value_cell (var));
+	  if (temp)
+	    {
+	      parse_bashopts (temp);
+	      free (temp);
+	    }
+	}
+    }
+
+  /* Set up the $BASHOPTS variable. */
+  set_bashopts ();
+}