build: add nconfig

Add support for make target nconfig (ncurses)

Reviewed-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
Signed-off-by: Sergio E. Nemirowski <sergio@outerface.net>
Signed-off-by: Petr Štetiar <ynezz@true.cz>

7 files changed, 2397 insertions, 2 deletions

diff --git a/include/toplevel.mk b/include/toplevel.mk
index 5cf93ce7ef..ba59595764 100644
--- a/include/toplevel.mk
+++ b/include/toplevel.mk
@@ -141,6 +141,13 @@ menuconfig: scripts/config/mconf prepare-tmpinfo FORCE
 	[ -L .config ] && export KCONFIG_OVERWRITECONFIG=1; \
 		$< Config.in
 
+nconfig: scripts/config/nconf prepare-tmpinfo FORCE
+	if [ \! -e .config -a -e $(HOME)/.openwrt/defconfig ]; then \
+		cp $(HOME)/.openwrt/defconfig .config; \
+	fi
+	[ -L .config ] && export KCONFIG_OVERWRITECONFIG=1; \
+		$< Config.in
+
 xconfig: scripts/config/qconf prepare-tmpinfo FORCE
 	if [ \! -e .config -a -e $(HOME)/.openwrt/defconfig ]; then \
 		cp $(HOME)/.openwrt/defconfig .config; \
diff --git a/scripts/config/Makefile b/scripts/config/Makefile
index d98f15c393..3082a65ceb 100644
--- a/scripts/config/Makefile
+++ b/scripts/config/Makefile
@@ -5,7 +5,7 @@
 .PHONY: clean all
 all: conf mconf
 clean:
-	rm -f *.o lxdialog/*.o *.moc $(clean-files) conf mconf qconf
+	rm -f *.o lxdialog/*.o *.moc $(clean-files) conf mconf qconf nconf
 
 # This clean-files definition is here to ensure that temporary files from the
 # previous version are removed by make config-clean.
@@ -52,6 +52,16 @@ HOSTCFLAGS_parser.tab.o	:= -I $(srctree)/$(src)
 hostprogs-y	+= conf
 conf-objs	:= conf.o $(common-objs)
 
+# nconf: Used for the nconfig target based on ncurses
+hostprogs-y	+= nconf
+nconf-objs	:= nconf.o nconf.gui.o $(common-objs)
+
+HOSTLDLIBS_nconf	= $(shell . $(obj)/nconf-cfg && echo $$libs)
+HOSTCFLAGS_nconf.o	= $(shell . $(obj)/nconf-cfg && echo $$cflags)
+HOSTCFLAGS_nconf.gui.o	= $(shell . $(obj)/nconf-cfg && echo $$cflags)
+
+$(obj)/nconf.o $(obj)/nconf.gui.o: $(obj)/nconf-cfg
+
 # mconf: Used for the menuconfig target based on lxdialog
 hostprogs-y	+= mconf
 lxdialog	:= $(addprefix lxdialog/, \
@@ -123,5 +133,8 @@ conf: $(conf-objs)
 mconf: mconf-cfg $(mconf-objs)
 	$(CC) -o $@ $(filter-out mconf-cfg,$^) $(HOSTLDLIBS_mconf)
 
+nconf: nconf-cfg $(nconf-objs)
+	$(CC) -o $@ $(filter-out nconf-cfg,$^) $(HOSTLDLIBS_nconf)
+
 qconf: qconf-cfg $(qconf-cxxobjs) $(qconf-objs)
 	$(CXX) -o $@ $(filter-out qconf-cfg,$^) $(HOSTLDLIBS_qconf)
diff --git a/scripts/config/README b/scripts/config/README
index 1e94ee46f1..f402cdc746 100644
--- a/scripts/config/README
+++ b/scripts/config/README
@@ -1,7 +1,7 @@
 These files were taken from the Linux Kernel Configuration System at commit
 089b7d890f972f6b649fedc9259f6b93a18fb970 (Feb 4, 2020) and modified for the
 OpenWrt Buildroot:
- - Removed nconf, gconf, tests and kernel configuration targets.
+ - Removed gconf, tests and kernel configuration targets.
  - Adjusted the Makefile to compile outside the kernel.
  - Always use default file when running make all{no,mod,yes}config.
  - Added a 'reset' command to reset config when the target changes.
diff --git a/scripts/config/nconf-cfg.sh b/scripts/config/nconf-cfg.sh
new file mode 100755
index 0000000000..c212255070
--- /dev/null
+++ b/scripts/config/nconf-cfg.sh
@@ -0,0 +1,50 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+PKG="ncursesw menuw panelw"
+PKG2="ncurses menu panel"
+
+if [ -n "$(command -v pkg-config)" ]; then
+	if pkg-config --exists $PKG; then
+		echo cflags=\"$(pkg-config --cflags $PKG)\"
+		echo libs=\"$(pkg-config --libs $PKG)\"
+		exit 0
+	fi
+
+	if pkg-config --exists $PKG2; then
+		echo cflags=\"$(pkg-config --cflags $PKG2)\"
+		echo libs=\"$(pkg-config --libs $PKG2)\"
+		exit 0
+	fi
+fi
+
+# Check the default paths in case pkg-config is not installed.
+# (Even if it is installed, some distributions such as openSUSE cannot
+# find ncurses by pkg-config.)
+if [ -f /usr/include/ncursesw/ncurses.h ]; then
+	echo cflags=\"-D_GNU_SOURCE -I/usr/include/ncursesw\"
+	echo libs=\"-lncursesw -lmenuw -lpanelw\"
+	exit 0
+fi
+
+if [ -f /usr/include/ncurses/ncurses.h ]; then
+	echo cflags=\"-D_GNU_SOURCE -I/usr/include/ncurses\"
+	echo libs=\"-lncurses -lmenu -lpanel\"
+	exit 0
+fi
+
+if [ -f /usr/include/ncurses.h ]; then
+	echo cflags=\"-D_GNU_SOURCE\"
+	echo libs=\"-lncurses -lmenu -lpanel\"
+	exit 0
+fi
+
+echo >&2 "*"
+echo >&2 "* Unable to find the ncurses package."
+echo >&2 "* Install ncurses (ncurses-devel or libncurses-dev"
+echo >&2 "* depending on your distribution)."
+echo >&2 "*"
+echo >&2 "* You may also need to install pkg-config to find the"
+echo >&2 "* ncurses installed in a non-default location."
+echo >&2 "*"
+exit 1
diff --git a/scripts/config/nconf.c b/scripts/config/nconf.c
new file mode 100644
index 0000000000..82ab7e3004
--- /dev/null
+++ b/scripts/config/nconf.c
@@ -0,0 +1,1569 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2008 Nir Tzachar <nir.tzachar@gmail.com>
+ *
+ * Derived from menuconfig.
+ */
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#include <string.h>
+#include <strings.h>
+#include <stdlib.h>
+
+#include "lkc.h"
+#include "nconf.h"
+#include <ctype.h>
+
+static const char nconf_global_help[] =
+"Help windows\n"
+"------------\n"
+"o  Global help:  Unless in a data entry window, pressing <F1> will give \n"
+"   you the global help window, which you are just reading.\n"
+"\n"
+"o  A short version of the global help is available by pressing <F3>.\n"
+"\n"
+"o  Local help:  To get help related to the current menu entry, use any\n"
+"   of <?> <h>, or if in a data entry window then press <F1>.\n"
+"\n"
+"\n"
+"OpenWrt config is based on Kernel kconfig\n"
+"so ipkg packages are referred here as modules.\n"
+"\n"
+"Menu entries\n"
+"------------\n"
+"This interface lets you select features and parameters for the build.\n"
+"Features can either be built-in, modularized, or removed.\n"
+"Parameters must be entered as text or decimal or hexadecimal numbers.\n"
+"\n"
+"Menu entries beginning with following braces represent features that\n"
+"  [ ]  can be built in or removed\n"
+"  < >  can be built in, modularized or removed\n"
+"  { }  can be built in or modularized, are selected by another feature\n"
+"  - -  are selected by another feature\n"
+"  XXX  cannot be selected.  Symbol Info <F2> tells you why.\n"
+"*, M or whitespace inside braces means to build in, build as a module\n"
+"or to exclude the feature respectively.\n"
+"\n"
+"To change any of these features, highlight it with the movement keys\n"
+"listed below and press <y> to build it in, <m> to make it a module or\n"
+"<n> to remove it.  You may press the <Space> key to cycle through the\n"
+"available options.\n"
+"\n"
+"A trailing \"--->\" designates a submenu, a trailing \"----\" an\n"
+"empty submenu.\n"
+"\n"
+"Menu navigation keys\n"
+"----------------------------------------------------------------------\n"
+"Linewise up                 <Up>\n"
+"Linewise down               <Down>\n"
+"Pagewise up                 <Page Up>\n"
+"Pagewise down               <Page Down>\n"
+"First entry                 <Home>\n"
+"Last entry                  <End>\n"
+"Enter a submenu             <Right>  <Enter>\n"
+"Go back to parent menu      <Left>   <Esc>  <F5>\n"
+"Close a help window         <Enter>  <Esc>  <F5>\n"
+"Close entry window, apply   <Enter>\n"
+"Close entry window, forget  <Esc>  <F5>\n"
+"Start incremental, case-insensitive search for STRING in menu entries,\n"
+"    no regex support, STRING is displayed in upper left corner\n"
+"                            </>STRING\n"
+"    Remove last character   <Backspace>\n"
+"    Jump to next hit        <Down>\n"
+"    Jump to previous hit    <Up>\n"
+"Exit menu search mode       </>  <Esc>\n"
+"Search for configuration variables with or without leading CONFIG_\n"
+"                            <F8>RegExpr<Enter>\n"
+"Verbose search help         <F8><F1>\n"
+"----------------------------------------------------------------------\n"
+"\n"
+"Unless in a data entry window, key <1> may be used instead of <F1>,\n"
+"<2> instead of <F2>, etc.\n"
+"\n"
+"\n"
+"Radiolist (Choice list)\n"
+"-----------------------\n"
+"Use the movement keys listed above to select the option you wish to set\n"
+"and press <Space>.\n"
+"\n"
+"\n"
+"Data entry\n"
+"----------\n"
+"Enter the requested information and press <Enter>.  Hexadecimal values\n"
+"may be entered without the \"0x\" prefix.\n"
+"\n"
+"\n"
+"Text Box (Help Window)\n"
+"----------------------\n"
+"Use movement keys as listed in table above.\n"
+"\n"
+"Press any of <Enter> <Esc> <q> <F5> <F9> to exit.\n"
+"\n"
+"\n"
+"Alternate configuration files\n"
+"-----------------------------\n"
+"nconfig supports switching between different configurations.\n"
+"Press <F6> to save your current configuration.  Press <F7> and enter\n"
+"a file name to load a previously saved configuration.\n"
+"\n"
+"\n"
+"Terminal configuration\n"
+"----------------------\n"
+"If you use nconfig in a xterm window, make sure your TERM environment\n"
+"variable specifies a terminal configuration which supports at least\n"
+"16 colors.  Otherwise nconfig will look rather bad.\n"
+"\n"
+"If the \"stty size\" command reports the current terminalsize correctly,\n"
+"nconfig will adapt to sizes larger than the traditional 80x25 \"standard\"\n"
+"and display longer menus properly.\n"
+"\n"
+"\n"
+"Single menu mode\n"
+"----------------\n"
+"If you prefer to have all of the menu entries listed in a single menu,\n"
+"rather than the default multimenu hierarchy, run nconfig with\n"
+"NCONFIG_MODE environment variable set to single_menu.  Example:\n"
+"\n"
+"make NCONFIG_MODE=single_menu nconfig\n"
+"\n"
+"<Enter> will then unfold the appropriate category, or fold it if it\n"
+"is already unfolded.  Folded menu entries will be designated by a\n"
+"leading \"++>\" and unfolded entries by a leading \"-->\".\n"
+"\n"
+"Note that this mode can eventually be a little more CPU expensive than\n"
+"the default mode, especially with a larger number of unfolded submenus.\n"
+"\n",
+menu_no_f_instructions[] =
+"Legend:  [*] built-in  [ ] excluded  <M> module  < > module capable.\n"
+"Submenus are designated by a trailing \"--->\", empty ones by \"----\".\n"
+"\n"
+"Use the following keys to navigate the menus:\n"
+"Move up or down with <Up> and <Down>.\n"
+"Enter a submenu with <Enter> or <Right>.\n"
+"Exit a submenu to its parent menu with <Esc> or <Left>.\n"
+"Pressing <y> includes, <n> excludes, <m> modularizes features.\n"
+"Pressing <Space> cycles through the available options.\n"
+"To search for menu entries press </>.\n"
+"<Esc> always leaves the current window.\n"
+"\n"
+"You do not have function keys support.\n"
+"Press <1> instead of <F1>, <2> instead of <F2>, etc.\n"
+"For verbose global help use key <1>.\n"
+"For help related to the current menu entry press <?> or <h>.\n",
+menu_instructions[] =
+"Legend:  [*] built-in  [ ] excluded  <M> module  < > module capable.\n"
+"Submenus are designated by a trailing \"--->\", empty ones by \"----\".\n"
+"\n"
+"Use the following keys to navigate the menus:\n"
+"Move up or down with <Up> or <Down>.\n"
+"Enter a submenu with <Enter> or <Right>.\n"
+"Exit a submenu to its parent menu with <Esc> or <Left>.\n"
+"Pressing <y> includes, <n> excludes, <m> modularizes features.\n"
+"Pressing <Space> cycles through the available options.\n"
+"To search for menu entries press </>.\n"
+"<Esc> always leaves the current window.\n"
+"\n"
+"Pressing <1> may be used instead of <F1>, <2> instead of <F2>, etc.\n"
+"For verbose global help press <F1>.\n"
+"For help related to the current menu entry press <?> or <h>.\n",
+radiolist_instructions[] =
+"Press <Up>, <Down>, <Home> or <End> to navigate a radiolist, select\n"
+"with <Space>.\n"
+"For help related to the current entry press <?> or <h>.\n"
+"For global help press <F1>.\n",
+inputbox_instructions_int[] =
+"Please enter a decimal value.\n"
+"Fractions will not be accepted.\n"
+"Press <Enter> to apply, <Esc> to cancel.",
+inputbox_instructions_hex[] =
+"Please enter a hexadecimal value.\n"
+"Press <Enter> to apply, <Esc> to cancel.",
+inputbox_instructions_string[] =
+"Please enter a string value.\n"
+"Press <Enter> to apply, <Esc> to cancel.",
+setmod_text[] =
+"This feature depends on another feature which has been configured as a\n"
+"module.  As a result, the current feature will be built as a module too.",
+load_config_text[] =
+"Enter the name of the configuration file you wish to load.\n"
+"Accept the name shown to restore the configuration you last\n"
+"retrieved.  Leave empty to abort.",
+load_config_help[] =
+"For various reasons, one may wish to keep several different\n"
+"configurations available on a single machine.\n"
+"\n"
+"If you have saved a previous configuration in a file other than the\n"
+"default one, entering its name here will allow you to load and modify\n"
+"that configuration.\n"
+"\n"
+"Leave empty to abort.\n",
+save_config_text[] =
+"Enter a filename to which this configuration should be saved\n"
+"as an alternate.  Leave empty to abort.",
+save_config_help[] =
+"For various reasons, one may wish to keep several different\n"
+"configurations available on a single machine.\n"
+"\n"
+"Entering a file name here will allow you to later retrieve, modify\n"
+"and use the current configuration as an alternate to whatever\n"
+"configuration options you have selected at that time.\n"
+"\n"
+"Leave empty to abort.\n",
+search_help[] =
+"Search for symbols (configuration variable names CONFIG_*) and display\n"
+"their relations.  Regular expressions are supported.\n"
+"Example:  Search for \"^FOO\".\n"
+"Result:\n"
+"-----------------------------------------------------------------\n"
+"Symbol: FOO [ = m]\n"
+"Prompt: Foo bus is used to drive the bar HW\n"
+"Defined at drivers/pci/Kconfig:47\n"
+"Depends on: X86_LOCAL_APIC && X86_IO_APIC || IA64\n"
+"Location:\n"
+"  -> Bus options (PCI, PCMCIA, EISA, ISA)\n"
+"    -> PCI support (PCI [ = y])\n"
+"      -> PCI access mode (<choice> [ = y])\n"
+"Selects: LIBCRC32\n"
+"Selected by: BAR\n"
+"-----------------------------------------------------------------\n"
+"o  The line 'Prompt:' shows the text displayed for this symbol in\n"
+"   the menu hierarchy.\n"
+"o  The 'Defined at' line tells at what file / line number the symbol is\n"
+"   defined.\n"
+"o  The 'Depends on:' line lists symbols that need to be defined for\n"
+"   this symbol to be visible and selectable in the menu.\n"
+"o  The 'Location:' lines tell, where in the menu structure this symbol\n"
+"   is located.  A location followed by a [ = y] indicates that this is\n"
+"   a selectable menu item, and the current value is displayed inside\n"
+"   brackets.\n"
+"o  The 'Selects:' line tells, what symbol will be automatically selected\n"
+"   if this symbol is selected (y or m).\n"
+"o  The 'Selected by' line tells what symbol has selected this symbol.\n"
+"\n"
+"Only relevant lines are shown.\n"
+"\n\n"
+"Search examples:\n"
+"USB  => find all symbols containing USB\n"
+"^USB => find all symbols starting with USB\n"
+"USB$ => find all symbols ending with USB\n"
+"\n";
+
+struct mitem {
+	char str[256];
+	char tag;
+	void *usrptr;
+	int is_visible;
+};
+
+#define MAX_MENU_ITEMS 4096
+static int show_all_items;
+static int indent;
+static struct menu *current_menu;
+static int child_count;
+static int single_menu_mode;
+/* the window in which all information appears */
+static WINDOW *main_window;
+/* the largest size of the menu window */
+static int mwin_max_lines;
+static int mwin_max_cols;
+/* the window in which we show option buttons */
+static MENU *curses_menu;
+static ITEM *curses_menu_items[MAX_MENU_ITEMS];
+static struct mitem k_menu_items[MAX_MENU_ITEMS];
+static int items_num;
+static int global_exit;
+/* the currently selected button */
+static const char *current_instructions = menu_instructions;
+
+static char *dialog_input_result;
+static int dialog_input_result_len;
+
+static void conf(struct menu *menu);
+static void conf_choice(struct menu *menu);
+static void conf_string(struct menu *menu);
+static void conf_load(void);
+static void conf_save(void);
+static void show_help(struct menu *menu);
+static int do_exit(void);
+static void setup_windows(void);
+static void search_conf(void);
+
+typedef void (*function_key_handler_t)(int *key, struct menu *menu);
+static void handle_f1(int *key, struct menu *current_item);
+static void handle_f2(int *key, struct menu *current_item);
+static void handle_f3(int *key, struct menu *current_item);
+static void handle_f4(int *key, struct menu *current_item);
+static void handle_f5(int *key, struct menu *current_item);
+static void handle_f6(int *key, struct menu *current_item);
+static void handle_f7(int *key, struct menu *current_item);
+static void handle_f8(int *key, struct menu *current_item);
+static void handle_f9(int *key, struct menu *current_item);
+
+struct function_keys {
+	const char *key_str;
+	const char *func;
+	function_key key;
+	function_key_handler_t handler;
+};
+
+static const int function_keys_num = 9;
+static struct function_keys function_keys[] = {
+	{
+		.key_str = "F1",
+		.func = "Help",
+		.key = F_HELP,
+		.handler = handle_f1,
+	},
+	{
+		.key_str = "F2",
+		.func = "SymInfo",
+		.key = F_SYMBOL,
+		.handler = handle_f2,
+	},
+	{
+		.key_str = "F3",
+		.func = "Help 2",
+		.key = F_INSTS,
+		.handler = handle_f3,
+	},
+	{
+		.key_str = "F4",
+		.func = "ShowAll",
+		.key = F_CONF,
+		.handler = handle_f4,
+	},
+	{
+		.key_str = "F5",
+		.func = "Back",
+		.key = F_BACK,
+		.handler = handle_f5,
+	},
+	{
+		.key_str = "F6",
+		.func = "Save",
+		.key = F_SAVE,
+		.handler = handle_f6,
+	},
+	{
+		.key_str = "F7",
+		.func = "Load",
+		.key = F_LOAD,
+		.handler = handle_f7,
+	},
+	{
+		.key_str = "F8",
+		.func = "SymSearch",
+		.key = F_SEARCH,
+		.handler = handle_f8,
+	},
+	{
+		.key_str = "F9",
+		.func = "Exit",
+		.key = F_EXIT,
+		.handler = handle_f9,
+	},
+};
+
+static void print_function_line(void)
+{
+	int i;
+	int offset = 1;
+	const int skip = 1;
+	int lines = getmaxy(stdscr);
+
+	for (i = 0; i < function_keys_num; i++) {
+		(void) wattrset(main_window, attributes[FUNCTION_HIGHLIGHT]);
+		mvwprintw(main_window, lines-3, offset,
+				"%s",
+				function_keys[i].key_str);
+		(void) wattrset(main_window, attributes[FUNCTION_TEXT]);
+		offset += strlen(function_keys[i].key_str);
+		mvwprintw(main_window, lines-3,
+				offset, "%s",
+				function_keys[i].func);
+		offset += strlen(function_keys[i].func) + skip;
+	}
+	(void) wattrset(main_window, attributes[NORMAL]);
+}
+
+/* help */
+static void handle_f1(int *key, struct menu *current_item)
+{
+	show_scroll_win(main_window,
+			"Global help", nconf_global_help);
+	return;
+}
+
+/* symbole help */
+static void handle_f2(int *key, struct menu *current_item)
+{
+	show_help(current_item);
+	return;
+}
+
+/* instructions */
+static void handle_f3(int *key, struct menu *current_item)
+{
+	show_scroll_win(main_window,
+			"Short help",
+			current_instructions);
+	return;
+}
+
+/* config */
+static void handle_f4(int *key, struct menu *current_item)
+{
+	int res = btn_dialog(main_window,
+			"Show all symbols?",
+			2,
+			"   <Show All>   ",
+			"<Don't show all>");
+	if (res == 0)
+		show_all_items = 1;
+	else if (res == 1)
+		show_all_items = 0;
+
+	return;
+}
+
+/* back */
+static void handle_f5(int *key, struct menu *current_item)
+{
+	*key = KEY_LEFT;
+	return;
+}
+
+/* save */
+static void handle_f6(int *key, struct menu *current_item)
+{
+	conf_save();
+	return;
+}
+
+/* load */
+static void handle_f7(int *key, struct menu *current_item)
+{
+	conf_load();
+	return;
+}
+
+/* search */
+static void handle_f8(int *key, struct menu *current_item)
+{
+	search_conf();
+	return;
+}
+
+/* exit */
+static void handle_f9(int *key, struct menu *current_item)
+{
+	do_exit();
+	return;
+}
+
+/* return != 0 to indicate the key was handles */
+static int process_special_keys(int *key, struct menu *menu)
+{
+	int i;
+
+	if (*key == KEY_RESIZE) {
+		setup_windows();
+		return 1;
+	}
+
+	for (i = 0; i < function_keys_num; i++) {
+		if (*key == KEY_F(function_keys[i].key) ||
+		    *key == '0' + function_keys[i].key){
+			function_keys[i].handler(key, menu);
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+static void clean_items(void)
+{
+	int i;
+	for (i = 0; curses_menu_items[i]; i++)
+		free_item(curses_menu_items[i]);
+	bzero(curses_menu_items, sizeof(curses_menu_items));
+	bzero(k_menu_items, sizeof(k_menu_items));
+	items_num = 0;
+}
+
+typedef enum {MATCH_TINKER_PATTERN_UP, MATCH_TINKER_PATTERN_DOWN,
+	FIND_NEXT_MATCH_DOWN, FIND_NEXT_MATCH_UP} match_f;
+
+/* return the index of the matched item, or -1 if no such item exists */
+static int get_mext_match(const char *match_str, match_f flag)
+{
+	int match_start = item_index(current_item(curses_menu));
+	int index;
+
+	if (flag == FIND_NEXT_MATCH_DOWN)
+		++match_start;
+	else if (flag == FIND_NEXT_MATCH_UP)
+		--match_start;
+
+	index = match_start;
+	index = (index + items_num) % items_num;
+	while (true) {
+		char *str = k_menu_items[index].str;
+		if (strcasestr(str, match_str) != NULL)
+			return index;
+		if (flag == FIND_NEXT_MATCH_UP ||
+		    flag == MATCH_TINKER_PATTERN_UP)
+			--index;
+		else
+			++index;
+		index = (index + items_num) % items_num;
+		if (index == match_start)
+			return -1;
+	}
+}
+
+/* Make a new item. */
+static void item_make(struct menu *menu, char tag, const char *fmt, ...)
+{
+	va_list ap;
+
+	if (items_num > MAX_MENU_ITEMS-1)
+		return;
+
+	bzero(&k_menu_items[items_num], sizeof(k_menu_items[0]));
+	k_menu_items[items_num].tag = tag;
+	k_menu_items[items_num].usrptr = menu;
+	if (menu != NULL)
+		k_menu_items[items_num].is_visible =
+			menu_is_visible(menu);
+	else
+		k_menu_items[items_num].is_visible = 1;
+
+	va_start(ap, fmt);
+	vsnprintf(k_menu_items[items_num].str,
+		  sizeof(k_menu_items[items_num].str),
+		  fmt, ap);
+	va_end(ap);
+
+	if (!k_menu_items[items_num].is_visible)
+		memcpy(k_menu_items[items_num].str, "XXX", 3);
+
+	curses_menu_items[items_num] = new_item(
+			k_menu_items[items_num].str,
+			k_menu_items[items_num].str);
+	set_item_userptr(curses_menu_items[items_num],
+			&k_menu_items[items_num]);
+	/*
+	if (!k_menu_items[items_num].is_visible)
+		item_opts_off(curses_menu_items[items_num], O_SELECTABLE);
+	*/
+
+	items_num++;
+	curses_menu_items[items_num] = NULL;
+}
+
+/* very hackish. adds a string to the last item added */
+static void item_add_str(const char *fmt, ...)
+{
+	va_list ap;
+	int index = items_num-1;
+	char new_str[256];
+	char tmp_str[256];
+
+	if (index < 0)
+		return;
+
+	va_start(ap, fmt);
+	vsnprintf(new_str, sizeof(new_str), fmt, ap);
+	va_end(ap);
+	snprintf(tmp_str, sizeof(tmp_str), "%s%s",
+			k_menu_items[index].str, new_str);
+	strncpy(k_menu_items[index].str,
+		tmp_str,
+		sizeof(k_menu_items[index].str));
+
+	free_item(curses_menu_items[index]);
+	curses_menu_items[index] = new_item(
+			k_menu_items[index].str,
+			k_menu_items[index].str);
+	set_item_userptr(curses_menu_items[index],
+			&k_menu_items[index]);
+}
+
+/* get the tag of the currently selected item */
+static char item_tag(void)
+{
+	ITEM *cur;
+	struct mitem *mcur;
+
+	cur = current_item(curses_menu);
+	if (cur == NULL)
+		return 0;
+	mcur = (struct mitem *) item_userptr(cur);
+	return mcur->tag;
+}
+
+static int curses_item_index(void)
+{
+	return  item_index(current_item(curses_menu));
+}
+
+static void *item_data(void)
+{
+	ITEM *cur;
+	struct mitem *mcur;
+
+	cur = current_item(curses_menu);
+	if (!cur)
+		return NULL;
+	mcur = (struct mitem *) item_userptr(cur);
+	return mcur->usrptr;
+
+}
+
+static int item_is_tag(char tag)
+{
+	return item_tag() == tag;
+}
+
+static char filename[PATH_MAX+1];
+static char menu_backtitle[PATH_MAX+128];
+static const char *set_config_filename(const char *config_filename)
+{
+	int size;
+
+	size = snprintf(menu_backtitle, sizeof(menu_backtitle),
+			"%s - %s", config_filename, rootmenu.prompt->text);
+	if (size >= sizeof(menu_backtitle))
+		menu_backtitle[sizeof(menu_backtitle)-1] = '\0';
+
+	size = snprintf(filename, sizeof(filename), "%s", config_filename);
+	if (size >= sizeof(filename))
+		filename[sizeof(filename)-1] = '\0';
+	return menu_backtitle;
+}
+
+/* return = 0 means we are successful.
+ * -1 means go on doing what you were doing
+ */
+static int do_exit(void)
+{
+	int res;
+	if (!conf_get_changed()) {
+		global_exit = 1;
+		return 0;
+	}
+	res = btn_dialog(main_window,
+			"Do you wish to save your new configuration?\n"
+				"<ESC> to cancel and resume nconfig.",
+			2,
+			"   <save>   ",
+			"<don't save>");
+	if (res == KEY_EXIT) {
+		global_exit = 0;
+		return -1;
+	}
+
+	/* if we got here, the user really wants to exit */
+	switch (res) {
+	case 0:
+		res = conf_write(filename);
+		if (res)
+			btn_dialog(
+				main_window,
+				"Error during writing of configuration.\n"
+				  "Your configuration changes were NOT saved.",
+				  1,
+				  "<OK>");
+		conf_write_autoconf(0);
+		break;
+	default:
+		btn_dialog(
+			main_window,
+			"Your configuration changes were NOT saved.",
+			1,
+			"<OK>");
+		break;
+	}
+	global_exit = 1;
+	return 0;
+}
+
+
+static void search_conf(void)
+{
+	struct symbol **sym_arr;
+	struct gstr res;
+	struct gstr title;
+	char *dialog_input;
+	int dres;
+
+	title = str_new();
+	str_printf( &title, "Enter (sub)string or regexp to search for "
+			      "(with or without \"%s\")", CONFIG_);
+
+again:
+	dres = dialog_inputbox(main_window,
+			"Search Configuration Parameter",
+			str_get(&title),
+			"", &dialog_input_result, &dialog_input_result_len);
+	switch (dres) {
+	case 0:
+		break;
+	case 1:
+		show_scroll_win(main_window,
+				"Search Configuration", search_help);
+		goto again;
+	default:
+		str_free(&title);
+		return;
+	}
+
+	/* strip the prefix if necessary */
+	dialog_input = dialog_input_result;
+	if (strncasecmp(dialog_input_result, CONFIG_, strlen(CONFIG_)) == 0)
+		dialog_input += strlen(CONFIG_);
+
+	sym_arr = sym_re_search(dialog_input);
+	res = get_relations_str(sym_arr, NULL);
+	free(sym_arr);
+	show_scroll_win(main_window,
+			"Search Results", str_get(&res));
+	str_free(&res);
+	str_free(&title);
+}
+
+
+static void build_conf(struct menu *menu)
+{
+	struct symbol *sym;
+	struct property *prop;
+	struct menu *child;
+	int type, tmp, doint = 2;
+	tristate val;
+	char ch;
+
+	if (!menu || (!show_all_items && !menu_is_visible(menu)))
+		return;
+
+	sym = menu->sym;
+	prop = menu->prompt;
+	if (!sym) {
+		if (prop && menu != current_menu) {
+			const char *prompt = menu_get_prompt(menu);
+			enum prop_type ptype;
+			ptype = menu->prompt ? menu->prompt->type : P_UNKNOWN;
+			switch (ptype) {
+			case P_MENU:
+				child_count++;
+				prompt = prompt;
+				if (single_menu_mode) {
+					item_make(menu, 'm',
+						"%s%*c%s",
+						menu->data ? "-->" : "++>",
+						indent + 1, ' ', prompt);
+				} else
+					item_make(menu, 'm',
+						  "   %*c%s  %s",
+						  indent + 1, ' ', prompt,
+						  menu_is_empty(menu) ? "----" : "--->");
+
+				if (single_menu_mode && menu->data)
+					goto conf_childs;
+				return;
+			case P_COMMENT:
+				if (prompt) {
+					child_count++;
+					item_make(menu, ':',
+						"   %*c*** %s ***",
+						indent + 1, ' ',
+						prompt);
+				}
+				break;
+			default:
+				if (prompt) {
+					child_count++;
+					item_make(menu, ':', "---%*c%s",
+						indent + 1, ' ',
+						prompt);
+				}
+			}
+		} else
+			doint = 0;
+		goto conf_childs;
+	}
+
+	type = sym_get_type(sym);
+	if (sym_is_choice(sym)) {
+		struct symbol *def_sym = sym_get_choice_value(sym);
+		struct menu *def_menu = NULL;
+
+		child_count++;
+		for (child = menu->list; child; child = child->next) {
+			if (menu_is_visible(child) && child->sym == def_sym)
+				def_menu = child;
+		}
+
+		val = sym_get_tristate_value(sym);
+		if (sym_is_changeable(sym)) {
+			switch (type) {
+			case S_BOOLEAN:
+				item_make(menu, 't', "[%c]",
+						val == no ? ' ' : '*');
+				break;
+			case S_TRISTATE:
+				switch (val) {
+				case yes:
+					ch = '*';
+					break;
+				case mod:
+					ch = 'M';
+					break;
+				default:
+					ch = ' ';
+					break;
+				}
+				item_make(menu, 't', "<%c>", ch);
+				break;
+			}
+		} else {
+			item_make(menu, def_menu ? 't' : ':', "   ");
+		}
+
+		item_add_str("%*c%s", indent + 1,
+				' ', menu_get_prompt(menu));
+		if (val == yes) {
+			if (def_menu) {
+				item_add_str(" (%s)",
+					menu_get_prompt(def_menu));
+				item_add_str("  --->");
+				if (def_menu->list) {
+					indent += 2;
+					build_conf(def_menu);
+					indent -= 2;
+				}
+			}
+			return;
+		}
+	} else {
+		if (menu == current_menu) {
+			item_make(menu, ':',
+				"---%*c%s", indent + 1,
+				' ', menu_get_prompt(menu));
+			goto conf_childs;
+		}
+		child_count++;
+		val = sym_get_tristate_value(sym);
+		if (sym_is_choice_value(sym) && val == yes) {
+			item_make(menu, ':', "   ");
+		} else {
+			switch (type) {
+			case S_BOOLEAN:
+				if (sym_is_changeable(sym))
+					item_make(menu, 't', "[%c]",
+						val == no ? ' ' : '*');
+				else
+					item_make(menu, 't', "-%c-",
+						val == no ? ' ' : '*');
+				break;
+			case S_TRISTATE:
+				switch (val) {
+				case yes:
+					ch = '*';
+					break;
+				case mod:
+					ch = 'M';
+					break;
+				default:
+					ch = ' ';
+					break;
+				}
+				if (sym_is_changeable(sym)) {
+					if (sym->rev_dep.tri == mod)
+						item_make(menu,
+							't', "{%c}", ch);
+					else
+						item_make(menu,
+							't', "<%c>", ch);
+				} else
+					item_make(menu, 't', "-%c-", ch);
+				break;
+			default:
+				tmp = 2 + strlen(sym_get_string_value(sym));
+				item_make(menu, 's', "    (%s)",
+						sym_get_string_value(sym));
+				tmp = indent - tmp + 4;
+				if (tmp < 0)
+					tmp = 0;
+				item_add_str("%*c%s%s", tmp, ' ',
+						menu_get_prompt(menu),
+						(sym_has_value(sym) ||
+						 !sym_is_changeable(sym)) ? "" :
+						" (NEW)");
+				goto conf_childs;
+			}
+		}
+		item_add_str("%*c%s%s", indent + 1, ' ',
+				menu_get_prompt(menu),
+				(sym_has_value(sym) || !sym_is_changeable(sym)) ?
+				"" : " (NEW)");
+		if (menu->prompt && menu->prompt->type == P_MENU) {
+			item_add_str("  %s", menu_is_empty(menu) ? "----" : "--->");
+			return;
+		}
+	}
+
+conf_childs:
+	indent += doint;
+	for (child = menu->list; child; child = child->next)
+		build_conf(child);
+	indent -= doint;
+}
+
+static void reset_menu(void)
+{
+	unpost_menu(curses_menu);
+	clean_items();
+}
+
+/* adjust the menu to show this item.
+ * prefer not to scroll the menu if possible*/
+static void center_item(int selected_index, int *last_top_row)
+{
+	int toprow;
+
+	set_top_row(curses_menu, *last_top_row);
+	toprow = top_row(curses_menu);
+	if (selected_index < toprow ||
+	    selected_index >= toprow+mwin_max_lines) {
+		toprow = max(selected_index-mwin_max_lines/2, 0);
+		if (toprow >= item_count(curses_menu)-mwin_max_lines)
+			toprow = item_count(curses_menu)-mwin_max_lines;
+		set_top_row(curses_menu, toprow);
+	}
+	set_current_item(curses_menu,
+			curses_menu_items[selected_index]);
+	*last_top_row = toprow;
+	post_menu(curses_menu);
+	refresh_all_windows(main_window);
+}
+
+/* this function assumes reset_menu has been called before */
+static void show_menu(const char *prompt, const char *instructions,
+		int selected_index, int *last_top_row)
+{
+	int maxx, maxy;
+	WINDOW *menu_window;
+
+	current_instructions = instructions;
+
+	clear();
+	(void) wattrset(main_window, attributes[NORMAL]);
+	print_in_middle(stdscr, 1, 0, getmaxx(stdscr),
+			menu_backtitle,
+			attributes[MAIN_HEADING]);
+
+	(void) wattrset(main_window, attributes[MAIN_MENU_BOX]);
+	box(main_window, 0, 0);
+	(void) wattrset(main_window, attributes[MAIN_MENU_HEADING]);
+	mvwprintw(main_window, 0, 3, " %s ", prompt);
+	(void) wattrset(main_window, attributes[NORMAL]);
+
+	set_menu_items(curses_menu, curses_menu_items);
+
+	/* position the menu at the middle of the screen */
+	scale_menu(curses_menu, &maxy, &maxx);
+	maxx = min(maxx, mwin_max_cols-2);
+	maxy = mwin_max_lines;
+	menu_window = derwin(main_window,
+			maxy,
+			maxx,
+			2,
+			(mwin_max_cols-maxx)/2);
+	keypad(menu_window, TRUE);
+	set_menu_win(curses_menu, menu_window);
+	set_menu_sub(curses_menu, menu_window);
+
+	/* must reassert this after changing items, otherwise returns to a
+	 * default of 16
+	 */
+	set_menu_format(curses_menu, maxy, 1);
+	center_item(selected_index, last_top_row);
+	set_menu_format(curses_menu, maxy, 1);
+
+	print_function_line();
+
+	/* Post the menu */
+	post_menu(curses_menu);
+	refresh_all_windows(main_window);
+}
+
+static void adj_match_dir(match_f *match_direction)
+{
+	if (*match_direction == FIND_NEXT_MATCH_DOWN)
+		*match_direction =
+			MATCH_TINKER_PATTERN_DOWN;
+	else if (*match_direction == FIND_NEXT_MATCH_UP)
+		*match_direction =
+			MATCH_TINKER_PATTERN_UP;
+	/* else, do no change.. */
+}
+
+struct match_state
+{
+	int in_search;
+	match_f match_direction;
+	char pattern[256];
+};
+
+/* Return 0 means I have handled the key. In such a case, ans should hold the
+ * item to center, or -1 otherwise.
+ * Else return -1 .
+ */
+static int do_match(int key, struct match_state *state, int *ans)
+{
+	char c = (char) key;
+	int terminate_search = 0;
+	*ans = -1;
+	if (key == '/' || (state->in_search && key == 27)) {
+		move(0, 0);
+		refresh();
+		clrtoeol();
+		state->in_search = 1-state->in_search;
+		bzero(state->pattern, sizeof(state->pattern));
+		state->match_direction = MATCH_TINKER_PATTERN_DOWN;
+		return 0;
+	} else if (!state->in_search)
+		return 1;
+
+	if (isalnum(c) || isgraph(c) || c == ' ') {
+		state->pattern[strlen(state->pattern)] = c;
+		state->pattern[strlen(state->pattern)] = '\0';
+		adj_match_dir(&state->match_direction);
+		*ans = get_mext_match(state->pattern,
+				state->match_direction);
+	} else if (key == KEY_DOWN) {
+		state->match_direction = FIND_NEXT_MATCH_DOWN;
+		*ans = get_mext_match(state->pattern,
+				state->match_direction);
+	} else if (key == KEY_UP) {
+		state->match_direction = FIND_NEXT_MATCH_UP;
+		*ans = get_mext_match(state->pattern,
+				state->match_direction);
+	} else if (key == KEY_BACKSPACE || key == 8 || key == 127) {
+		state->pattern[strlen(state->pattern)-1] = '\0';
+		adj_match_dir(&state->match_direction);
+	} else
+		terminate_search = 1;
+
+	if (terminate_search) {
+		state->in_search = 0;
+		bzero(state->pattern, sizeof(state->pattern));
+		move(0, 0);
+		refresh();
+		clrtoeol();
+		return -1;
+	}
+	return 0;
+}
+
+static void conf(struct menu *menu)
+{
+	struct menu *submenu = NULL;
+	const char *prompt = menu_get_prompt(menu);
+	struct symbol *sym;
+	int res;
+	int current_index = 0;
+	int last_top_row = 0;
+	struct match_state match_state = {
+		.in_search = 0,
+		.match_direction = MATCH_TINKER_PATTERN_DOWN,
+		.pattern = "",
+	};
+
+	while (!global_exit) {
+		reset_menu();
+		current_menu = menu;
+		build_conf(menu);
+		if (!child_count)
+			break;
+
+		show_menu(prompt ? prompt : "Main Menu",
+				menu_instructions,
+				current_index, &last_top_row);
+		keypad((menu_win(curses_menu)), TRUE);
+		while (!global_exit) {
+			if (match_state.in_search) {
+				mvprintw(0, 0,
+					"searching: %s", match_state.pattern);
+				clrtoeol();
+			}
+			refresh_all_windows(main_window);
+			res = wgetch(menu_win(curses_menu));
+			if (!res)
+				break;
+			if (do_match(res, &match_state, &current_index) == 0) {
+				if (current_index != -1)
+					center_item(current_index,
+						    &last_top_row);
+				continue;
+			}
+			if (process_special_keys(&res,
+						(struct menu *) item_data()))
+				break;
+			switch (res) {
+			case KEY_DOWN:
+				menu_driver(curses_menu, REQ_DOWN_ITEM);
+				break;
+			case KEY_UP:
+				menu_driver(curses_menu, REQ_UP_ITEM);
+				break;
+			case KEY_NPAGE:
+				menu_driver(curses_menu, REQ_SCR_DPAGE);
+				break;
+			case KEY_PPAGE:
+				menu_driver(curses_menu, REQ_SCR_UPAGE);
+				break;
+			case KEY_HOME:
+				menu_driver(curses_menu, REQ_FIRST_ITEM);
+				break;
+			case KEY_END:
+				menu_driver(curses_menu, REQ_LAST_ITEM);
+				break;
+			case 'h':
+			case '?':
+				show_help((struct menu *) item_data());
+				break;
+			}
+			if (res == 10 || res == 27 ||
+				res == 32 || res == 'n' || res == 'y' ||
+				res == KEY_LEFT || res == KEY_RIGHT ||
+				res == 'm')
+				break;
+			refresh_all_windows(main_window);
+		}
+
+		refresh_all_windows(main_window);
+		/* if ESC or left*/
+		if (res == 27 || (menu != &rootmenu && res == KEY_LEFT))
+			break;
+
+		/* remember location in the menu */
+		last_top_row = top_row(curses_menu);
+		current_index = curses_item_index();
+
+		if (!item_tag())
+			continue;
+
+		submenu = (struct menu *) item_data();
+		if (!submenu || !menu_is_visible(submenu))
+			continue;
+		sym = submenu->sym;
+
+		switch (res) {
+		case ' ':
+			if (item_is_tag('t'))
+				sym_toggle_tristate_value(sym);
+			else if (item_is_tag('m'))
+				conf(submenu);
+			break;
+		case KEY_RIGHT:
+		case 10: /* ENTER WAS PRESSED */
+			switch (item_tag()) {
+			case 'm':
+				if (single_menu_mode)
+					submenu->data =
+						(void *) (long) !submenu->data;
+				else
+					conf(submenu);
+				break;
+			case 't':
+				if (sym_is_choice(sym) &&
+				    sym_get_tristate_value(sym) == yes)
+					conf_choice(submenu);
+				else if (submenu->prompt &&
+					 submenu->prompt->type == P_MENU)
+					conf(submenu);
+				else if (res == 10)
+					sym_toggle_tristate_value(sym);
+				break;
+			case 's':
+				conf_string(submenu);
+				break;
+			}
+			break;
+		case 'y':
+			if (item_is_tag('t')) {
+				if (sym_set_tristate_value(sym, yes))
+					break;
+				if (sym_set_tristate_value(sym, mod))
+					btn_dialog(main_window, setmod_text, 0);
+			}
+			break;
+		case 'n':
+			if (item_is_tag('t'))
+				sym_set_tristate_value(sym, no);
+			break;
+		case 'm':
+			if (item_is_tag('t'))
+				sym_set_tristate_value(sym, mod);
+			break;
+		}
+	}
+}
+
+static void conf_message_callback(const char *s)
+{
+	btn_dialog(main_window, s, 1, "<OK>");
+}
+
+static void show_help(struct menu *menu)
+{
+	struct gstr help;
+
+	if (!menu)
+		return;
+
+	help = str_new();
+	menu_get_ext_help(menu, &help);
+	show_scroll_win(main_window, menu_get_prompt(menu), str_get(&help));
+	str_free(&help);
+}
+
+static void conf_choice(struct menu *menu)
+{
+	const char *prompt = menu_get_prompt(menu);
+	struct menu *child = NULL;
+	struct symbol *active;
+	struct property *prop;
+	int selected_index = 0;
+	int last_top_row = 0;
+	int res, i = 0;
+	struct match_state match_state = {
+		.in_search = 0,
+		.match_direction = MATCH_TINKER_PATTERN_DOWN,
+		.pattern = "",
+	};
+
+	active = sym_get_choice_value(menu->sym);
+	/* this is mostly duplicated from the conf() function. */
+	while (!global_exit) {
+		reset_menu();
+
+		for (i = 0, child = menu->list; child; child = child->next) {
+			if (!show_all_items && !menu_is_visible(child))
+				continue;
+
+			if (child->sym == sym_get_choice_value(menu->sym))
+				item_make(child, ':', "<X> %s",
+						menu_get_prompt(child));
+			else if (child->sym)
+				item_make(child, ':', "    %s",
+						menu_get_prompt(child));
+			else
+				item_make(child, ':', "*** %s ***",
+						menu_get_prompt(child));
+
+			if (child->sym == active){
+				last_top_row = top_row(curses_menu);
+				selected_index = i;
+			}
+			i++;
+		}
+		show_menu(prompt ? prompt : "Choice Menu",
+				radiolist_instructions,
+				selected_index,
+				&last_top_row);
+		while (!global_exit) {
+			if (match_state.in_search) {
+				mvprintw(0, 0, "searching: %s",
+					 match_state.pattern);
+				clrtoeol();
+			}
+			refresh_all_windows(main_window);
+			res = wgetch(menu_win(curses_menu));
+			if (!res)
+				break;
+			if (do_match(res, &match_state, &selected_index) == 0) {
+				if (selected_index != -1)
+					center_item(selected_index,
+						    &last_top_row);
+				continue;
+			}
+			if (process_special_keys(
+						&res,
+						(struct menu *) item_data()))
+				break;
+			switch (res) {
+			case KEY_DOWN:
+				menu_driver(curses_menu, REQ_DOWN_ITEM);
+				break;
+			case KEY_UP:
+				menu_driver(curses_menu, REQ_UP_ITEM);
+				break;
+			case KEY_NPAGE:
+				menu_driver(curses_menu, REQ_SCR_DPAGE);
+				break;
+			case KEY_PPAGE:
+				menu_driver(curses_menu, REQ_SCR_UPAGE);
+				break;
+			case KEY_HOME:
+				menu_driver(curses_menu, REQ_FIRST_ITEM);
+				break;
+			case KEY_END:
+				menu_driver(curses_menu, REQ_LAST_ITEM);
+				break;
+			case 'h':
+			case '?':
+				show_help((struct menu *) item_data());
+				break;
+			}
+			if (res == 10 || res == 27 || res == ' ' ||
+					res == KEY_LEFT){
+				break;
+			}
+			refresh_all_windows(main_window);
+		}
+		/* if ESC or left */
+		if (res == 27 || res == KEY_LEFT)
+			break;
+
+		child = item_data();
+		if (!child || !menu_is_visible(child) || !child->sym)
+			continue;
+		switch (res) {
+		case ' ':
+		case  10:
+		case KEY_RIGHT:
+			if (sym_get_tristate_value(child->sym) != yes) {
+				for_all_properties(menu->sym, prop, P_RESET) {
+					if (expr_calc_value(prop->visible.expr) == no)
+						continue;
+
+					conf_reset(S_DEF_USER);
+					break;
+				}
+			}
+			sym_set_tristate_value(child->sym, yes);
+			return;
+		case 'h':
+		case '?':
+			show_help(child);
+			active = child->sym;
+			break;
+		case KEY_EXIT:
+			return;
+		}
+	}
+}
+
+static void conf_string(struct menu *menu)
+{
+	const char *prompt = menu_get_prompt(menu);
+
+	while (1) {
+		int res;
+		const char *heading;
+
+		switch (sym_get_type(menu->sym)) {
+		case S_INT:
+			heading = inputbox_instructions_int;
+			break;
+		case S_HEX:
+			heading = inputbox_instructions_hex;
+			break;
+		case S_STRING:
+			heading = inputbox_instructions_string;
+			break;
+		default:
+			heading = "Internal nconf error!";
+		}
+		res = dialog_inputbox(main_window,
+				prompt ? prompt : "Main Menu",
+				heading,
+				sym_get_string_value(menu->sym),
+				&dialog_input_result,
+				&dialog_input_result_len);
+		switch (res) {
+		case 0:
+			if (sym_set_string_value(menu->sym,
+						dialog_input_result))
+				return;
+			btn_dialog(main_window,
+				"You have made an invalid entry.", 0);
+			break;
+		case 1:
+			show_help(menu);
+			break;
+		case KEY_EXIT:
+			return;
+		}
+	}
+}
+
+static void conf_load(void)
+{
+	while (1) {
+		int res;
+		res = dialog_inputbox(main_window,
+				NULL, load_config_text,
+				filename,
+				&dialog_input_result,
+				&dialog_input_result_len);
+		switch (res) {
+		case 0:
+			if (!dialog_input_result[0])
+				return;
+			if (!conf_read(dialog_input_result)) {
+				set_config_filename(dialog_input_result);
+				sym_set_change_count(1);
+				return;
+			}
+			btn_dialog(main_window, "File does not exist!", 0);
+			break;
+		case 1:
+			show_scroll_win(main_window,
+					"Load Alternate Configuration",
+					load_config_help);
+			break;
+		case KEY_EXIT:
+			return;
+		}
+	}
+}
+
+static void conf_save(void)
+{
+	while (1) {
+		int res;
+		res = dialog_inputbox(main_window,
+				NULL, save_config_text,
+				filename,
+				&dialog_input_result,
+				&dialog_input_result_len);
+		switch (res) {
+		case 0:
+			if (!dialog_input_result[0])
+				return;
+			res = conf_write(dialog_input_result);
+			if (!res) {
+				set_config_filename(dialog_input_result);
+				return;
+			}
+			btn_dialog(main_window, "Can't create file!",
+				1, "<OK>");
+			break;
+		case 1:
+			show_scroll_win(main_window,
+				"Save Alternate Configuration",
+				save_config_help);
+			break;
+		case KEY_EXIT:
+			return;
+		}
+	}
+}
+
+static void setup_windows(void)
+{
+	int lines, columns;
+
+	getmaxyx(stdscr, lines, columns);
+
+	if (main_window != NULL)
+		delwin(main_window);
+
+	/* set up the menu and menu window */
+	main_window = newwin(lines-2, columns-2, 2, 1);
+	keypad(main_window, TRUE);
+	mwin_max_lines = lines-7;
+	mwin_max_cols = columns-6;
+
+	/* panels order is from bottom to top */
+	new_panel(main_window);
+}
+
+int main(int ac, char **av)
+{
+	int lines, columns;
+	char *mode;
+
+	if (ac > 1 && strcmp(av[1], "-s") == 0) {
+		/* Silence conf_read() until the real callback is set up */
+		conf_set_message_callback(NULL);
+		av++;
+	}
+	conf_parse(av[1]);
+	conf_read(NULL);
+
+	mode = getenv("NCONFIG_MODE");
+	if (mode) {
+		if (!strcasecmp(mode, "single_menu"))
+			single_menu_mode = 1;
+	}
+
+	/* Initialize curses */
+	initscr();
+	/* set color theme */
+	set_colors();
+
+	cbreak();
+	noecho();
+	keypad(stdscr, TRUE);
+	curs_set(0);
+
+	getmaxyx(stdscr, lines, columns);
+	if (columns < 75 || lines < 20) {
+		endwin();
+		printf("Your terminal should have at "
+			"least 20 lines and 75 columns\n");
+		return 1;
+	}
+
+	notimeout(stdscr, FALSE);
+#if NCURSES_REENTRANT
+	set_escdelay(1);
+#else
+	ESCDELAY = 1;
+#endif
+
+	/* set btns menu */
+	curses_menu = new_menu(curses_menu_items);
+	menu_opts_off(curses_menu, O_SHOWDESC);
+	menu_opts_on(curses_menu, O_SHOWMATCH);
+	menu_opts_on(curses_menu, O_ONEVALUE);
+	menu_opts_on(curses_menu, O_NONCYCLIC);
+	menu_opts_on(curses_menu, O_IGNORECASE);
+	set_menu_mark(curses_menu, " ");
+	set_menu_fore(curses_menu, attributes[MAIN_MENU_FORE]);
+	set_menu_back(curses_menu, attributes[MAIN_MENU_BACK]);
+	set_menu_grey(curses_menu, attributes[MAIN_MENU_GREY]);
+
+	set_config_filename(conf_get_configname());
+	setup_windows();
+
+	/* check for KEY_FUNC(1) */
+	if (has_key(KEY_F(1)) == FALSE) {
+		show_scroll_win(main_window,
+				"Instructions",
+				menu_no_f_instructions);
+	}
+
+	conf_set_message_callback(conf_message_callback);
+	/* do the work */
+	while (!global_exit) {
+		conf(&rootmenu);
+		if (!global_exit && do_exit() == 0)
+			break;
+	}
+	/* ok, we are done */
+	unpost_menu(curses_menu);
+	free_menu(curses_menu);
+	delwin(main_window);
+	clear();
+	refresh();
+	endwin();
+	return 0;
+}
diff --git a/scripts/config/nconf.gui.c b/scripts/config/nconf.gui.c
new file mode 100644
index 0000000000..77f525a861
--- /dev/null
+++ b/scripts/config/nconf.gui.c
@@ -0,0 +1,664 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2008 Nir Tzachar <nir.tzachar@gmail.com>
+ *
+ * Derived from menuconfig.
+ */
+#include "nconf.h"
+#include "lkc.h"
+
+/* a list of all the different widgets we use */
+attributes_t attributes[ATTR_MAX+1] = {0};
+
+/* available colors:
+   COLOR_BLACK   0
+   COLOR_RED     1
+   COLOR_GREEN   2
+   COLOR_YELLOW  3
+   COLOR_BLUE    4
+   COLOR_MAGENTA 5
+   COLOR_CYAN    6
+   COLOR_WHITE   7
+   */
+static void set_normal_colors(void)
+{
+	init_pair(NORMAL, -1, -1);
+	init_pair(MAIN_HEADING, COLOR_MAGENTA, -1);
+
+	/* FORE is for the selected item */
+	init_pair(MAIN_MENU_FORE, -1, -1);
+	/* BACK for all the rest */
+	init_pair(MAIN_MENU_BACK, -1, -1);
+	init_pair(MAIN_MENU_GREY, -1, -1);
+	init_pair(MAIN_MENU_HEADING, COLOR_GREEN, -1);
+	init_pair(MAIN_MENU_BOX, COLOR_YELLOW, -1);
+
+	init_pair(SCROLLWIN_TEXT, -1, -1);
+	init_pair(SCROLLWIN_HEADING, COLOR_GREEN, -1);
+	init_pair(SCROLLWIN_BOX, COLOR_YELLOW, -1);
+
+	init_pair(DIALOG_TEXT, -1, -1);
+	init_pair(DIALOG_BOX, COLOR_YELLOW, -1);
+	init_pair(DIALOG_MENU_BACK, COLOR_YELLOW, -1);
+	init_pair(DIALOG_MENU_FORE, COLOR_RED, -1);
+
+	init_pair(INPUT_BOX, COLOR_YELLOW, -1);
+	init_pair(INPUT_HEADING, COLOR_GREEN, -1);
+	init_pair(INPUT_TEXT, -1, -1);
+	init_pair(INPUT_FIELD, -1, -1);
+
+	init_pair(FUNCTION_HIGHLIGHT, -1, -1);
+	init_pair(FUNCTION_TEXT, COLOR_YELLOW, -1);
+}
+
+/* available attributes:
+   A_NORMAL        Normal display (no highlight)
+   A_STANDOUT      Best highlighting mode of the terminal.
+   A_UNDERLINE     Underlining
+   A_REVERSE       Reverse video
+   A_BLINK         Blinking
+   A_DIM           Half bright
+   A_BOLD          Extra bright or bold
+   A_PROTECT       Protected mode
+   A_INVIS         Invisible or blank mode
+   A_ALTCHARSET    Alternate character set
+   A_CHARTEXT      Bit-mask to extract a character
+   COLOR_PAIR(n)   Color-pair number n
+   */
+static void normal_color_theme(void)
+{
+	/* automatically add color... */
+#define mkattr(name, attr) do { \
+attributes[name] = attr | COLOR_PAIR(name); } while (0)
+	mkattr(NORMAL, NORMAL);
+	mkattr(MAIN_HEADING, A_BOLD | A_UNDERLINE);
+
+	mkattr(MAIN_MENU_FORE, A_REVERSE);
+	mkattr(MAIN_MENU_BACK, A_NORMAL);
+	mkattr(MAIN_MENU_GREY, A_NORMAL);
+	mkattr(MAIN_MENU_HEADING, A_BOLD);
+	mkattr(MAIN_MENU_BOX, A_NORMAL);
+
+	mkattr(SCROLLWIN_TEXT, A_NORMAL);
+	mkattr(SCROLLWIN_HEADING, A_BOLD);
+	mkattr(SCROLLWIN_BOX, A_BOLD);
+
+	mkattr(DIALOG_TEXT, A_BOLD);
+	mkattr(DIALOG_BOX, A_BOLD);
+	mkattr(DIALOG_MENU_FORE, A_STANDOUT);
+	mkattr(DIALOG_MENU_BACK, A_NORMAL);
+
+	mkattr(INPUT_BOX, A_NORMAL);
+	mkattr(INPUT_HEADING, A_BOLD);
+	mkattr(INPUT_TEXT, A_NORMAL);
+	mkattr(INPUT_FIELD, A_UNDERLINE);
+
+	mkattr(FUNCTION_HIGHLIGHT, A_BOLD);
+	mkattr(FUNCTION_TEXT, A_REVERSE);
+}
+
+static void no_colors_theme(void)
+{
+	/* automatically add highlight, no color */
+#define mkattrn(name, attr) { attributes[name] = attr; }
+
+	mkattrn(NORMAL, NORMAL);
+	mkattrn(MAIN_HEADING, A_BOLD | A_UNDERLINE);
+
+	mkattrn(MAIN_MENU_FORE, A_STANDOUT);
+	mkattrn(MAIN_MENU_BACK, A_NORMAL);
+	mkattrn(MAIN_MENU_GREY, A_NORMAL);
+	mkattrn(MAIN_MENU_HEADING, A_BOLD);
+	mkattrn(MAIN_MENU_BOX, A_NORMAL);
+
+	mkattrn(SCROLLWIN_TEXT, A_NORMAL);
+	mkattrn(SCROLLWIN_HEADING, A_BOLD);
+	mkattrn(SCROLLWIN_BOX, A_BOLD);
+
+	mkattrn(DIALOG_TEXT, A_NORMAL);
+	mkattrn(DIALOG_BOX, A_BOLD);
+	mkattrn(DIALOG_MENU_FORE, A_STANDOUT);
+	mkattrn(DIALOG_MENU_BACK, A_NORMAL);
+
+	mkattrn(INPUT_BOX, A_BOLD);
+	mkattrn(INPUT_HEADING, A_BOLD);
+	mkattrn(INPUT_TEXT, A_NORMAL);
+	mkattrn(INPUT_FIELD, A_UNDERLINE);
+
+	mkattrn(FUNCTION_HIGHLIGHT, A_BOLD);
+	mkattrn(FUNCTION_TEXT, A_REVERSE);
+}
+
+void set_colors(void)
+{
+	start_color();
+	use_default_colors();
+	set_normal_colors();
+	if (has_colors()) {
+		normal_color_theme();
+	} else {
+		/* give defaults */
+		no_colors_theme();
+	}
+}
+
+
+/* this changes the windows attributes !!! */
+void print_in_middle(WINDOW *win,
+		int starty,
+		int startx,
+		int width,
+		const char *string,
+		chtype color)
+{      int length, x, y;
+	float temp;
+
+
+	if (win == NULL)
+		win = stdscr;
+	getyx(win, y, x);
+	if (startx != 0)
+		x = startx;
+	if (starty != 0)
+		y = starty;
+	if (width == 0)
+		width = 80;
+
+	length = strlen(string);
+	temp = (width - length) / 2;
+	x = startx + (int)temp;
+	(void) wattrset(win, color);
+	mvwprintw(win, y, x, "%s", string);
+	refresh();
+}
+
+int get_line_no(const char *text)
+{
+	int i;
+	int total = 1;
+
+	if (!text)
+		return 0;
+
+	for (i = 0; text[i] != '\0'; i++)
+		if (text[i] == '\n')
+			total++;
+	return total;
+}
+
+const char *get_line(const char *text, int line_no)
+{
+	int i;
+	int lines = 0;
+
+	if (!text)
+		return NULL;
+
+	for (i = 0; text[i] != '\0' && lines < line_no; i++)
+		if (text[i] == '\n')
+			lines++;
+	return text+i;
+}
+
+int get_line_length(const char *line)
+{
+	int res = 0;
+	while (*line != '\0' && *line != '\n') {
+		line++;
+		res++;
+	}
+	return res;
+}
+
+/* print all lines to the window. */
+void fill_window(WINDOW *win, const char *text)
+{
+	int x, y;
+	int total_lines = get_line_no(text);
+	int i;
+
+	getmaxyx(win, y, x);
+	/* do not go over end of line */
+	total_lines = min(total_lines, y);
+	for (i = 0; i < total_lines; i++) {
+		char tmp[x+10];
+		const char *line = get_line(text, i);
+		int len = get_line_length(line);
+		strncpy(tmp, line, min(len, x));
+		tmp[len] = '\0';
+		mvwprintw(win, i, 0, "%s", tmp);
+	}
+}
+
+/* get the message, and buttons.
+ * each button must be a char*
+ * return the selected button
+ *
+ * this dialog is used for 2 different things:
+ * 1) show a text box, no buttons.
+ * 2) show a dialog, with horizontal buttons
+ */
+int btn_dialog(WINDOW *main_window, const char *msg, int btn_num, ...)
+{
+	va_list ap;
+	char *btn;
+	int btns_width = 0;
+	int msg_lines = 0;
+	int msg_width = 0;
+	int total_width;
+	int win_rows = 0;
+	WINDOW *win;
+	WINDOW *msg_win;
+	WINDOW *menu_win;
+	MENU *menu;
+	ITEM *btns[btn_num+1];
+	int i, x, y;
+	int res = -1;
+
+
+	va_start(ap, btn_num);
+	for (i = 0; i < btn_num; i++) {
+		btn = va_arg(ap, char *);
+		btns[i] = new_item(btn, "");
+		btns_width += strlen(btn)+1;
+	}
+	va_end(ap);
+	btns[btn_num] = NULL;
+
+	/* find the widest line of msg: */
+	msg_lines = get_line_no(msg);
+	for (i = 0; i < msg_lines; i++) {
+		const char *line = get_line(msg, i);
+		int len = get_line_length(line);
+		if (msg_width < len)
+			msg_width = len;
+	}
+
+	total_width = max(msg_width, btns_width);
+	/* place dialog in middle of screen */
+	y = (getmaxy(stdscr)-(msg_lines+4))/2;
+	x = (getmaxx(stdscr)-(total_width+4))/2;
+
+
+	/* create the windows */
+	if (btn_num > 0)
+		win_rows = msg_lines+4;
+	else
+		win_rows = msg_lines+2;
+
+	win = newwin(win_rows, total_width+4, y, x);
+	keypad(win, TRUE);
+	menu_win = derwin(win, 1, btns_width, win_rows-2,
+			1+(total_width+2-btns_width)/2);
+	menu = new_menu(btns);
+	msg_win = derwin(win, win_rows-2, msg_width, 1,
+			1+(total_width+2-msg_width)/2);
+
+	set_menu_fore(menu, attributes[DIALOG_MENU_FORE]);
+	set_menu_back(menu, attributes[DIALOG_MENU_BACK]);
+
+	(void) wattrset(win, attributes[DIALOG_BOX]);
+	box(win, 0, 0);
+
+	/* print message */
+	(void) wattrset(msg_win, attributes[DIALOG_TEXT]);
+	fill_window(msg_win, msg);
+
+	set_menu_win(menu, win);
+	set_menu_sub(menu, menu_win);
+	set_menu_format(menu, 1, btn_num);
+	menu_opts_off(menu, O_SHOWDESC);
+	menu_opts_off(menu, O_SHOWMATCH);
+	menu_opts_on(menu, O_ONEVALUE);
+	menu_opts_on(menu, O_NONCYCLIC);
+	set_menu_mark(menu, "");
+	post_menu(menu);
+
+
+	touchwin(win);
+	refresh_all_windows(main_window);
+	while ((res = wgetch(win))) {
+		switch (res) {
+		case KEY_LEFT:
+			menu_driver(menu, REQ_LEFT_ITEM);
+			break;
+		case KEY_RIGHT:
+			menu_driver(menu, REQ_RIGHT_ITEM);
+			break;
+		case 10: /* ENTER */
+		case 27: /* ESCAPE */
+		case ' ':
+		case KEY_F(F_BACK):
+		case KEY_F(F_EXIT):
+			break;
+		}
+		touchwin(win);
+		refresh_all_windows(main_window);
+
+		if (res == 10 || res == ' ') {
+			res = item_index(current_item(menu));
+			break;
+		} else if (res == 27 || res == KEY_F(F_BACK) ||
+				res == KEY_F(F_EXIT)) {
+			res = KEY_EXIT;
+			break;
+		}
+	}
+
+	unpost_menu(menu);
+	free_menu(menu);
+	for (i = 0; i < btn_num; i++)
+		free_item(btns[i]);
+
+	delwin(win);
+	return res;
+}
+
+int dialog_inputbox(WINDOW *main_window,
+		const char *title, const char *prompt,
+		const char *init, char **resultp, int *result_len)
+{
+	int prompt_lines = 0;
+	int prompt_width = 0;
+	WINDOW *win;
+	WINDOW *prompt_win;
+	WINDOW *form_win;
+	PANEL *panel;
+	int i, x, y, lines, columns, win_lines, win_cols;
+	int res = -1;
+	int cursor_position = strlen(init);
+	int cursor_form_win;
+	char *result = *resultp;
+
+	getmaxyx(stdscr, lines, columns);
+
+	if (strlen(init)+1 > *result_len) {
+		*result_len = strlen(init)+1;
+		*resultp = result = xrealloc(result, *result_len);
+	}
+
+	/* find the widest line of msg: */
+	prompt_lines = get_line_no(prompt);
+	for (i = 0; i < prompt_lines; i++) {
+		const char *line = get_line(prompt, i);
+		int len = get_line_length(line);
+		prompt_width = max(prompt_width, len);
+	}
+
+	if (title)
+		prompt_width = max(prompt_width, strlen(title));
+
+	win_lines = min(prompt_lines+6, lines-2);
+	win_cols = min(prompt_width+7, columns-2);
+	prompt_lines = max(win_lines-6, 0);
+	prompt_width = max(win_cols-7, 0);
+
+	/* place dialog in middle of screen */
+	y = (lines-win_lines)/2;
+	x = (columns-win_cols)/2;
+
+	strncpy(result, init, *result_len);
+
+	/* create the windows */
+	win = newwin(win_lines, win_cols, y, x);
+	prompt_win = derwin(win, prompt_lines+1, prompt_width, 2, 2);
+	form_win = derwin(win, 1, prompt_width, prompt_lines+3, 2);
+	keypad(form_win, TRUE);
+
+	(void) wattrset(form_win, attributes[INPUT_FIELD]);
+
+	(void) wattrset(win, attributes[INPUT_BOX]);
+	box(win, 0, 0);
+	(void) wattrset(win, attributes[INPUT_HEADING]);
+	if (title)
+		mvwprintw(win, 0, 3, "%s", title);
+
+	/* print message */
+	(void) wattrset(prompt_win, attributes[INPUT_TEXT]);
+	fill_window(prompt_win, prompt);
+
+	mvwprintw(form_win, 0, 0, "%*s", prompt_width, " ");
+	cursor_form_win = min(cursor_position, prompt_width-1);
+	mvwprintw(form_win, 0, 0, "%s",
+		  result + cursor_position-cursor_form_win);
+
+	/* create panels */
+	panel = new_panel(win);
+
+	/* show the cursor */
+	curs_set(1);
+
+	touchwin(win);
+	refresh_all_windows(main_window);
+	while ((res = wgetch(form_win))) {
+		int len = strlen(result);
+		switch (res) {
+		case 10: /* ENTER */
+		case 27: /* ESCAPE */
+		case KEY_F(F_HELP):
+		case KEY_F(F_EXIT):
+		case KEY_F(F_BACK):
+			break;
+		case 8:   /* ^H */
+		case 127: /* ^? */
+		case KEY_BACKSPACE:
+			if (cursor_position > 0) {
+				memmove(&result[cursor_position-1],
+						&result[cursor_position],
+						len-cursor_position+1);
+				cursor_position--;
+				cursor_form_win--;
+				len--;
+			}
+			break;
+		case KEY_DC:
+			if (cursor_position >= 0 && cursor_position < len) {
+				memmove(&result[cursor_position],
+						&result[cursor_position+1],
+						len-cursor_position+1);
+				len--;
+			}
+			break;
+		case KEY_UP:
+		case KEY_RIGHT:
+			if (cursor_position < len) {
+				cursor_position++;
+				cursor_form_win++;
+			}
+			break;
+		case KEY_DOWN:
+		case KEY_LEFT:
+			if (cursor_position > 0) {
+				cursor_position--;
+				cursor_form_win--;
+			}
+			break;
+		case KEY_HOME:
+			cursor_position = 0;
+			cursor_form_win = 0;
+			break;
+		case KEY_END:
+			cursor_position = len;
+			cursor_form_win = min(cursor_position, prompt_width-1);
+			break;
+		default:
+			if ((isgraph(res) || isspace(res))) {
+				/* one for new char, one for '\0' */
+				if (len+2 > *result_len) {
+					*result_len = len+2;
+					*resultp = result = realloc(result,
+								*result_len);
+				}
+				/* insert the char at the proper position */
+				memmove(&result[cursor_position+1],
+						&result[cursor_position],
+						len-cursor_position+1);
+				result[cursor_position] = res;
+				cursor_position++;
+				cursor_form_win++;
+				len++;
+			} else {
+				mvprintw(0, 0, "unknown key: %d\n", res);
+			}
+			break;
+		}
+		if (cursor_form_win < 0)
+			cursor_form_win = 0;
+		else if (cursor_form_win > prompt_width-1)
+			cursor_form_win = prompt_width-1;
+
+		wmove(form_win, 0, 0);
+		wclrtoeol(form_win);
+		mvwprintw(form_win, 0, 0, "%*s", prompt_width, " ");
+		mvwprintw(form_win, 0, 0, "%s",
+			result + cursor_position-cursor_form_win);
+		wmove(form_win, 0, cursor_form_win);
+		touchwin(win);
+		refresh_all_windows(main_window);
+
+		if (res == 10) {
+			res = 0;
+			break;
+		} else if (res == 27 || res == KEY_F(F_BACK) ||
+				res == KEY_F(F_EXIT)) {
+			res = KEY_EXIT;
+			break;
+		} else if (res == KEY_F(F_HELP)) {
+			res = 1;
+			break;
+		}
+	}
+
+	/* hide the cursor */
+	curs_set(0);
+	del_panel(panel);
+	delwin(prompt_win);
+	delwin(form_win);
+	delwin(win);
+	return res;
+}
+
+/* refresh all windows in the correct order */
+void refresh_all_windows(WINDOW *main_window)
+{
+	update_panels();
+	touchwin(main_window);
+	refresh();
+}
+
+/* layman's scrollable window... */
+void show_scroll_win(WINDOW *main_window,
+		const char *title,
+		const char *text)
+{
+	int res;
+	int total_lines = get_line_no(text);
+	int x, y, lines, columns;
+	int start_x = 0, start_y = 0;
+	int text_lines = 0, text_cols = 0;
+	int total_cols = 0;
+	int win_cols = 0;
+	int win_lines = 0;
+	int i = 0;
+	WINDOW *win;
+	WINDOW *pad;
+	PANEL *panel;
+
+	getmaxyx(stdscr, lines, columns);
+
+	/* find the widest line of msg: */
+	total_lines = get_line_no(text);
+	for (i = 0; i < total_lines; i++) {
+		const char *line = get_line(text, i);
+		int len = get_line_length(line);
+		total_cols = max(total_cols, len+2);
+	}
+
+	/* create the pad */
+	pad = newpad(total_lines+10, total_cols+10);
+	(void) wattrset(pad, attributes[SCROLLWIN_TEXT]);
+	fill_window(pad, text);
+
+	win_lines = min(total_lines+4, lines-2);
+	win_cols = min(total_cols+2, columns-2);
+	text_lines = max(win_lines-4, 0);
+	text_cols = max(win_cols-2, 0);
+
+	/* place window in middle of screen */
+	y = (lines-win_lines)/2;
+	x = (columns-win_cols)/2;
+
+	win = newwin(win_lines, win_cols, y, x);
+	keypad(win, TRUE);
+	/* show the help in the help window, and show the help panel */
+	(void) wattrset(win, attributes[SCROLLWIN_BOX]);
+	box(win, 0, 0);
+	(void) wattrset(win, attributes[SCROLLWIN_HEADING]);
+	mvwprintw(win, 0, 3, " %s ", title);
+	panel = new_panel(win);
+
+	/* handle scrolling */
+	do {
+
+		copywin(pad, win, start_y, start_x, 2, 2, text_lines,
+				text_cols, 0);
+		print_in_middle(win,
+				text_lines+2,
+				0,
+				text_cols,
+				"<OK>",
+				attributes[DIALOG_MENU_FORE]);
+		wrefresh(win);
+
+		res = wgetch(win);
+		switch (res) {
+		case KEY_NPAGE:
+		case ' ':
+		case 'd':
+			start_y += text_lines-2;
+			break;
+		case KEY_PPAGE:
+		case 'u':
+			start_y -= text_lines+2;
+			break;
+		case KEY_HOME:
+			start_y = 0;
+			break;
+		case KEY_END:
+			start_y = total_lines-text_lines;
+			break;
+		case KEY_DOWN:
+		case 'j':
+			start_y++;
+			break;
+		case KEY_UP:
+		case 'k':
+			start_y--;
+			break;
+		case KEY_LEFT:
+		case 'h':
+			start_x--;
+			break;
+		case KEY_RIGHT:
+		case 'l':
+			start_x++;
+			break;
+		}
+		if (res == 10 || res == 27 || res == 'q' ||
+			res == KEY_F(F_HELP) || res == KEY_F(F_BACK) ||
+			res == KEY_F(F_EXIT))
+			break;
+		if (start_y < 0)
+			start_y = 0;
+		if (start_y >= total_lines-text_lines)
+			start_y = total_lines-text_lines;
+		if (start_x < 0)
+			start_x = 0;
+		if (start_x >= total_cols-text_cols)
+			start_x = total_cols-text_cols;
+	} while (res);
+
+	del_panel(panel);
+	delwin(win);
+	refresh_all_windows(main_window);
+}
diff --git a/scripts/config/nconf.h b/scripts/config/nconf.h
new file mode 100644
index 0000000000..fa5245eb93
--- /dev/null
+++ b/scripts/config/nconf.h
@@ -0,0 +1,92 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2008 Nir Tzachar <nir.tzachar@gmail.com>
+ *
+ * Derived from menuconfig.
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <ncurses.h>
+#include <menu.h>
+#include <panel.h>
+#include <form.h>
+
+#include <stdio.h>
+#include <time.h>
+#include <sys/time.h>
+
+#define max(a, b) ({\
+		typeof(a) _a = a;\
+		typeof(b) _b = b;\
+		_a > _b ? _a : _b; })
+
+#define min(a, b) ({\
+		typeof(a) _a = a;\
+		typeof(b) _b = b;\
+		_a < _b ? _a : _b; })
+
+typedef enum {
+	NORMAL = 1,
+	MAIN_HEADING,
+	MAIN_MENU_BOX,
+	MAIN_MENU_FORE,
+	MAIN_MENU_BACK,
+	MAIN_MENU_GREY,
+	MAIN_MENU_HEADING,
+	SCROLLWIN_TEXT,
+	SCROLLWIN_HEADING,
+	SCROLLWIN_BOX,
+	DIALOG_TEXT,
+	DIALOG_MENU_FORE,
+	DIALOG_MENU_BACK,
+	DIALOG_BOX,
+	INPUT_BOX,
+	INPUT_HEADING,
+	INPUT_TEXT,
+	INPUT_FIELD,
+	FUNCTION_TEXT,
+	FUNCTION_HIGHLIGHT,
+	ATTR_MAX
+} attributes_t;
+extern attributes_t attributes[];
+
+typedef enum {
+	F_HELP = 1,
+	F_SYMBOL = 2,
+	F_INSTS = 3,
+	F_CONF = 4,
+	F_BACK = 5,
+	F_SAVE = 6,
+	F_LOAD = 7,
+	F_SEARCH = 8,
+	F_EXIT = 9,
+} function_key;
+
+void set_colors(void);
+
+/* this changes the windows attributes !!! */
+void print_in_middle(WINDOW *win,
+		int starty,
+		int startx,
+		int width,
+		const char *string,
+		chtype color);
+int get_line_length(const char *line);
+int get_line_no(const char *text);
+const char *get_line(const char *text, int line_no);
+void fill_window(WINDOW *win, const char *text);
+int btn_dialog(WINDOW *main_window, const char *msg, int btn_num, ...);
+int dialog_inputbox(WINDOW *main_window,
+		const char *title, const char *prompt,
+		const char *init, char **resultp, int *result_len);
+void refresh_all_windows(WINDOW *main_window);
+void show_scroll_win(WINDOW *main_window,
+		const char *title,
+		const char *text);