Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

mark(3menu)


NAME

   set_menu_mark, menu_mark - get and set the menu mark string

SYNOPSIS

   #include <menu.h>
   int set_menu_mark(MENU *menu, const char *mark);
   const char *menu_mark(const MENU *menu);

DESCRIPTION

   In  order  to  make  menu selections visible on older terminals without
   highlighting or color capability, the menu library marks selected items
   in a menu with a prefix string.

   The  function  set_menu_mark  sets  the mark string for the given menu.
   Calling set_menu_mark with a null  menu  item  will  abolish  the  mark
   string.   Note  that  changing the length of the mark string for a menu
   while the menu is posted is likely to produce unhelpful behavior.

   The default string is "-" (a dash). Calling set_menu_mark with  a  non-
   NULL menu argument will change this default.

   The function menu_mark returns the menu's mark string (or NULL if there
   is none).

RETURN VALUE

   The function menu_mark returns a pointer (which may be NULL).  It  does
   not set errno.

   The function set_menu_mark may return the following error codes:

   E_OK The routine succeeded.

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

   E_SYSTEM_ERROR
        System error occurred (see errno).

SEE ALSO

   ncurses(3NCURSES), menu(3MENU).

NOTES

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

PORTABILITY

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

AUTHORS

   Juergen Pfeifer.  Manual pages and adaptation for new curses by Eric S.
   Raymond.

                                                               mark(3MENU)



Opportunity


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.



Education


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.


birds banner