COLORS, COLOR_PAIRS, COLS, ESCDELAY, LINES, TABSIZE, curscr, newscr, stdscr − curses global variables
WINDOW * curscr;
WINDOW * newscr;
WINDOW * stdscr;
This page summarizes variables provided by the curses library. A more complete description is given in the curses(3X) manual page.
Depending on the configuration, these may be actual variables, or macros (see threads(3NCURSES) and opaque(3NCURSES)) which provide read-only access to curses’s state. In either case, applications should treat them as read-only to avoid confusing the library.
After initializing curses, this variable contains the number of color pairs which the terminal can support. Usually the number of color pairs will be the product COLORS*COLORS, however this is not always true:
a few terminals use HLS colors, which do not follow this rule
terminals supporting a large number of colors are limited by the number of color pairs that can be represented in a signed short value.
After initializing curses, this variable contains the number of colors which the terminal can support.
After initializing curses, this variable contains the width of the screen, i.e., the number of columns.
This variable holds the number of milliseconds to wait after reading an escape character, to distinguish between an individual escape character entered on the keyboard from escape sequences sent by cursor- and function-keys (see curses(3X).
After initializing curses, this variable contains the height of the screen, i.e., the number of lines.
This variable holds the number of columns used by the curses library when converting a tab character to spaces as it adds the tab to a window (see curs_addch(3X).
This implementation of curses uses a special window curscr to record its updates to the terminal screen.
This implementation of curses uses a special window newscr to hold updates to the terminal screen before applying them to curscr.
Upon initializing curses, a default window called stdscr, which is the size of the terminal screen, is created. Many curses functions use this window.
The curses library is initialized using either initscr(3X), or newterm(3X).
If curses is configured to use separate curses/terminfo libraries, most of these variables reside in the curses library.
ESCDELAY and TABSIZE are extensions, not provided in most other implementations of curses.
ncurses(3NCURSES), opaque(3NCURSES), terminfo(3NCURSES), threads(3NCURSES), terminfo_variables(3NCURSES), terminfo(5).
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.