bkgdset, wbkgdset, bkgd, wbkgd, getbkgd - curses window background manipulation routines
#include <curses.h> void bkgdset(chtype ch); void wbkgdset(WINDOW *win, chtype ch); int bkgd(chtype ch); int wbkgd(WINDOW *win, chtype ch); chtype getbkgd(WINDOW *win);
bkgdset The bkgdset and wbkgdset routines manipulate the background of the named window. The window background is a chtype consisting of any combination of attributes (i.e., rendition) and a character. The attribute part of the background is combined (OR'ed) with all non-blank characters that are written into the window with waddch. Both the character and attribute parts of the background are combined with the blank characters. The background becomes a property of the character and moves with the character through any scrolling and insert/delete line/character operations. To the extent possible on a particular terminal, the attribute part of the background is displayed as the graphic rendition of the character put on the screen. bkgd The bkgd and wbkgd functions set the background property of the current or specified window and then apply this setting to every character position in that window: * The rendition of every character on the screen is changed to the new background rendition. * Wherever the former background character appears, it is changed to the new background character. getbkgd The getbkgd function returns the given window's current background character/attribute pair.
The routines bkgd and wbkgd return the integer OK. The SVr4.0 manual says "or a non-negative integer if immedok is set", but this appears to be an error.
Note that bkgdset and bkgd may be macros.
These functions are described in the XSI Curses standard, Issue 4. It specifies that bkgd and wbkgd return ERR on failure, but gives no failure conditions.
ncurses(3NCURSES), addch(3NCURSES), attr(3NCURSES), outopts(3NCURSES) bkgd(3NCURSES)
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 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.
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.