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term_variables(3X) term_variables(3X)
NAME
SP, acs_map, boolcodes, boolfnames, boolnames, cur_term, numcodes, numfnames, numnames,
strcodes, strfnames, strnames, ttytype - curses terminfo global variables
SYNOPSIS
#include <curses.h>
#include <term.h>
chtype acs_map[];
NCURSES_CONST char * const * boolcodes;
NCURSES_CONST char * const * boolfnames;
NCURSES_CONST char * const * boolnames;
TERMINAL * cur_term;
NCURSES_CONST char * const * numcodes;
NCURSES_CONST char * const * numfnames;
NCURSES_CONST char * const * numnames;
NCURSES_CONST char * const * strcodes;
NCURSES_CONST char * const * strfnames;
NCURSES_CONST char * const * strnames;
char ttytype[];
DESCRIPTION
This page summarizes variables provided by the curses library's low-level terminfo inter-
face. A more complete description is given in the curs_terminfo(3X) manual page.
Depending on the configuration, these may be actual variables, or macros (see
curs_threads(3X)) which provide read-only access to curses's state. In either case, ap-
plications should treat them as read-only to avoid confusing the library.
Alternate Character Set Mapping
After initializing the curses or terminfo interfaces, the acs_map array holds information
used to translate cells with the A_ALTCHARSET video attribute into line-drawing charac-
ters.
The encoding of the information in this array has changed periodically. Application de-
velopers need only know that it is used for the "ACS_" constants in <curses.h>.
The comparable data for the wide-character library is a private variable.
Current Terminal Data
After initializing the curses or terminfo interfaces, the cur_term contains data describ-
ing the current terminal. This variable is also set as a side-effect of set_term(3X) and
delscreen(3X).
It is possible to save a value of cur_term for subsequent use as a parameter to set_term,
for switching between screens. Alternatively, one can save the return value from newterm
or setupterm to reuse in set_term.
Terminfo Names
The tic(1) and infocmp(1) programs use lookup tables for the long and short names of ter-
minfo capabilities, as well as the corresponding names for termcap capabilities. These
are available to other applications, though the hash-tables are not available.
The long terminfo capability names use a "l" (ell) in their names: boolfnames numfnames
strfnames
These are the short names for terminfo capabilities: boolnames, numnames, and strnames.
These are the corresponding names used for termcap descriptions: boolcodes, numcodes, and
strcodes.
Terminal Type
On initialization of the curses or terminfo interfaces, setupterm copies the terminal name
to the array ttytype.
NOTES
The low-level terminfo interface is initialized using setupterm(3X). The upper-level
curses interface uses the low-level terminfo interface, internally.
PORTABILITY
X/Open Curses does not describe any of these except for cur_term. (The inclusion of
cur_term appears to be an oversight, since other comparable low-level information is omit-
ted by X/Open).
Other implementations may have comparable variables. Some implementations provide the
variables in their libraries, but omit them from the header files.
SEE ALSO
curses(3X), curs_terminfo(3X), curs_threads(3X), terminfo(3X), terminfo(5).
term_variables(3X)
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