menu - curses extension for programming menus


   #include <menu.h>


   The menu library provides terminal-independent facilities for composing
   menu systems on character-cell terminals.  The library  includes:  item
   routines,  which create and modify menu items; and menu routines, which
   group items into  menus,  display  menus  on  the  screen,  and  handle
   interaction with the user.

   The menu library uses the curses libraries, and a curses initialization
   routine such as initscr must  be  called  before  using  any  of  these
   functions.   To  use  the  menu  library,  link with the options -lmenu

   Current Default Values for Item Attributes
   The menu library maintains a default value for  item  attributes.   You
   can  get  or  set  this default by calling the appropriate get_ or set_
   routine with a NULL item pointer.  Changing this default  with  a  set_
   function  affects  future  item  creations,  but  does  not  change the
   rendering of items already created.

   Routine Name Index
   The following table lists each menu routine and the name of the  manual
   page on which it is described.

   curses Routine Name    Manual Page Name
   current_item           menu_current(3MENU)
   free_item              menu_new(3MENU)
   free_menu              new(3MENU)
   item_count             items(3MENU)
   item_description       menu_name(3MENU)
   item_index             menu_current(3MENU)
   item_init              hook(3MENU)
   item_name              menu_name(3MENU)
   item_opts              menu_opts(3MENU)
   item_opts_off          menu_opts(3MENU)
   item_opts_on           menu_opts(3MENU)
   item_term              hook(3MENU)
   item_userptr           menu_userptr(3MENU)
   item_value             menu_value(3MENU)
   item_visible           menu_visible(3MENU)
   menu_back              attributes(3MENU)
   menu_driver            driver(3MENU)
   menu_fore              attributes(3MENU)
   menu_format            format(3MENU)
   menu_grey              attributes(3MENU)
   menu_init              hook(3MENU)
   menu_items             items(3MENU)
   menu_mark              mark(3MENU)
   menu_opts              opts(3MENU)
   menu_opts_off          opts(3MENU)
   menu_opts_on           opts(3MENU)
   menu_pad               attributes(3MENU)
   menu_pattern           pattern(3MENU)
   menu_request_by_name   requestname(3MENU)
   menu_request_name      requestname(3MENU)

   menu_spacing           spacing(3MENU)
   menu_sub               win(3MENU)
   menu_term              hook(3MENU)
   menu_userptr           userptr(3MENU)
   menu_win               win(3MENU)
   new_item               menu_new(3MENU)
   new_menu               new(3MENU)
   pos_menu_cursor        cursor(3MENU)
   post_menu              post(3MENU)
   scale_menu             win(3MENU)
   set_current_item       menu_current(3MENU)
   set_item_init          hook(3MENU)
   set_item_opts          menu_opts(3MENU)
   set_item_term          hook(3MENU)
   set_item_userptr       menu_userptr(3MENU)
   set_item_value         menu_value(3MENU)
   set_menu_back          attributes(3MENU)
   set_menu_fore          attributes(3MENU)
   set_menu_format        format(3MENU)
   set_menu_grey          attributes(3MENU)
   set_menu_init          hook(3MENU)
   set_menu_items         items(3MENU)
   set_menu_mark          mark(3MENU)
   set_menu_opts          menu_opts(3MENU)
   set_menu_pad           attributes(3MENU)
   set_menu_pattern       pattern(3MENU)
   set_menu_spacing       spacing(3MENU)
   set_menu_sub           win(3MENU)
   set_menu_term          hook(3MENU)
   set_menu_userptr       userptr(3MENU)
   set_menu_win           win(3MENU)
   set_top_row            menu_current(3MENU)
   top_row                menu_current(3MENU)
   unpost_menu            post(3MENU)


   Routines  that  return  pointers  return  NULL on error.  Routines that
   return an integer return one of the following error codes:

   E_OK The routine succeeded.

        Routine detected an incorrect or out-of-range argument.

        Routine was called from an initialization or termination function.

        Character failed to match.

        Menu is too large for its window.

        No items are connected to the menu.

        The menu has not been posted.

        The designated item cannot be selected.

        The menu is already posted.

        The menu driver could not process the request.

        System error occurred (see errno).

        The menu driver code saw an unknown request code.


   The header  file  <menu.h>  automatically  includes  the  header  files
   <curses.h> and <eti.h>.

   In your library list, libmenu.a should be before libncurses.a; that is,
   you want to say `-lmenu -lncurses', not the  other  way  around  (which
   would usually give a link-error).


   These  routines  emulate  the  System  V  menu  library.  They were not
   supported on Version 7 or BSD versions.


   Juergen Pfeifer.  Manual pages and adaptation for ncurses  by  Eric  S.


   ncurses(3NCURSES)  and  related  pages  whose  names  begin "menu_" for
   detailed descriptions of the entry points.

   This describes ncurses version 6.0 (patch 20160625).



Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.

Free Software

Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.

Free Books

The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.