The function getstr is equivalent to a series of calls to
getch, until a newline or carriage return is received (the
terminating character is not included in the returned
- string). The resulting value is placed in the area
- pointed to by the character pointer str.
+ string). The resulting value is placed in the area point-
+ ed to by the character pointer str.
wgetnstr reads at most n characters, thus preventing a
- possible overflow of the input buffer. Any attempt to
- enter more characters (other than the terminating newline
- or carriage return) causes a beep. Function keys also
- cause a beep and are ignored. The getnstr function reads
- from the stdscr default window.
+ possible overflow of the input buffer. Any attempt to en-
+ ter more characters (other than the terminating newline or
+ carriage return) causes a beep. Function keys also cause
+ a beep and are ignored. The getnstr function reads from
+ the stdscr default window.
The user's erase and kill characters are interpreted. If
keypad mode is on for the window, KEY_LEFT and
@@ -92,24 +93,38 @@
All routines return the integer ERR upon failure and an OK
(SVr4 specifies only "an integer value other than ERR")
upon successful completion.
+ X/Open defines no error conditions.
+
+ In this implementation, these functions return an error if
+ the window pointer is null, or if its timeout expires
+ without having any data.
+
+ This implementation provides an extension as well. If a
+ SIGWINCH interrupts the function, it will return KEY_RE-
+ SIZE rather than OK or ERR.
+
+ Functions with a "mv" prefix first perform a cursor move-
+ ment using wmove, and return an error if the position is
+ outside the window, or if the window pointer is null.
+
These functions are described in the XSI Curses standard,
Issue 4. They read single-byte characters only. The
- standard does not define any error conditions. This
- implementation returns ERR if the window pointer is null,
- or if the lower-level wgetch call returns an ERR.
+ standard does not define any error conditions. This im-
+ plementation returns ERR if the window pointer is null, or
+ if the lower-level wgetch call returns an ERR.
SVr3 and early SVr4 curses implementations did not reject
function keys; the SVr4.0 documentation claimed that "spe-
@@ -120,22 +135,28 @@
useful (being, in fact, the low-order eight bits of the
key's KEY_ value).
- The functions getnstr, mvgetnstr, and mvwgetnstr were pre-
- sent but not documented in SVr4.
+ The functions getnstr, mvgetnstr, and mvwgetnstr were
+ present but not documented in SVr4.