delay_output, filter, flushinp, getwin, key_name, keyname,
putwin, unctrl, use_env, wunctrl - miscellaneous curses
char *unctrl(chtype c);
char *wunctrl(cchar_t *c);
char *keyname(int c);
char *key_name(wchar_t w);
void use_env(bool f);
int putwin(WINDOW *win, FILE *filep);
WINDOW *getwin(FILE *filep);
int delay_output(int ms);
The unctrl routine returns a character string which is a
printable representation of the character c, ignoring at-
tributes. Control characters are displayed in the ^X no-
tation. Printing characters are displayed as is. The
corresponding wunctrl returns a printable representation
of a wide-character.
The keyname routine returns a character string correspond-
ing to the key c. Control characters are displayed in the
^X notation. Values above 128 are either meta characters,
shown in the M-X notation, or the names of function keys,
or null. The corresponding key_name returns a character
string corresponding to the wide-character value w. The
two functions do not return the same set of strings; the
latter returns null where the former would display a meta
The filter routine, if used, must be called before initscr
or newterm are called. The effect is that, during those
calls, LINES is set to 1; the capabilities clear, cup,
cud, cud1, cuu1, cuu, vpa are disabled; and the home
string is set to the value of cr.
The use_env routine, if used, is called before initscr or
newterm are called. When called with FALSE as an argu-
ment, the values of lines and columns specified in the
terminfo database will be used, even if environment vari-
ables LINES and COLUMNS (used by default) are set, or if
curses is running in a window (in which case default be-
havior would be to use the window size if LINES and
COLUMNS are not set). Note that setting LINES or COLUMNS
overrides the corresponding size which may be obtained
from the operating system.
The putwin routine writes all data associated with window
win into the file to which filep points. This information
can be later retrieved using the getwin function.
The getwin routine reads window related data stored in the
file by putwin. The routine then creates and initializes
a new window using that data. It returns a pointer to the
The delay_output routine inserts an ms millisecond pause
in output. This routine should not be used extensively
because padding characters are used rather than a CPU
pause. If no padding character is specified, this uses
napms to perform the delay.
The flushinp routine throws away any typeahead that has
been typed by the user and has not yet been read by the
Except for flushinp, routines that return an integer re-
turn ERR upon failure and OK (SVr4 specifies only "an in-
teger value other than ERR") upon successful completion.
Routines that return pointers return NULL on error.
X/Open does not define any error conditions. In this im-
returns an error if the terminal was not ini-
returns an error if the associated fwrite
calls return an error.
The XSI Curses standard, Issue 4 describes these func-
tions. It states that unctrl and wunctrl will return a
null pointer if unsuccessful, but does not define any er-
The SVr4 documentation describes the action of filter only
in the vaguest terms. The description here is adapted
from the XSI Curses standard (which erroneously fails to
describe the disabling of cuu).
The strings returned by unctrl in this implementation are
determined at compile time, showing C1 controls from the
upper-128 codes with a `~' prefix rather than `^'. Other
implementations typically show both sets of control char-
acters with `^', and may strip the parameter to 7 bits.
This implementation uses 8 bits but does not modify the
string to reflect locale.
The keyname function may return the names of user-defined
string capabilities which are defined in the terminfo en-
try via the -x option of tic.
curses(3x), curs_initscr(3x), curs_kernel(3x),
Man(1) output converted with