USE_ENV(3XCURSES) X/Open Curses Library Functions USE_ENV(3XCURSES)
NAME
use_env - specify source of screen size information
SYNOPSIS
cc [
flag... ]
file...
-I /usr/xpg4/include
-L /usr/xpg4/lib \
-R /usr/xpg4/lib
-lcurses [
library... ]
c89 [
flag... ]
file...
-lcurses [
library... ]
#include <curses.h>
void use_env(
bool boolval);
PARAMETERS
boolval Is a Boolean expression.
DESCRIPTION
The
use_env() function specifies the technique by which the
implementation determines the size of the screen. If
boolval is
FALSE, the implementation uses the values of
lines and
columns specified in the
terminfo database. If
boolval is
TRUE, the
implementation uses the
LINES and
COLUMNS environmental variables.
The initial value is
TRUE.
Any call to
use_env() must precede calls to
initscr(3XCURSES),
newterm(3XCURSES), or
setupterm(3XCURSES).
RETURN VALUES
The
use_env() function does not return a value.
ERRORS
No errors are defined.
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Standard |
+--------------------+-----------------+
|MT-Level | Unsafe |
+--------------------+-----------------+
SEE ALSO
del_curterm(3XCURSES),
initscr(3XCURSES),
libcurses(3XCURSES),
attributes(7),
standards(7) June 5, 2002 USE_ENV(3XCURSES)
