* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************
- * @Id: curs_getch.3x,v 1.47 2016/06/11 22:56:33 tom Exp @
+ * @Id: curs_getch.3x,v 1.48 2016/09/10 21:56:25 Leon.Winter Exp @
-->
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<STRONG>wgetch</STRONG>
returns ERR if the window pointer is null, or if
- its timeout expires without having any data.
+ its timeout expires without having any data, or if
+ the execution was interrupted by a signal (<STRONG>errno</STRONG>
+ will be set to <STRONG>EINTR</STRONG>).
Functions with a "mv" prefix first perform a cursor move-
ment using <STRONG>wmove</STRONG>, and return an error if the position is
Programmers concerned about portability should be prepared
for either of two cases: (a) signal receipt does not in-
terrupt <STRONG>getch</STRONG>; (b) signal receipt interrupts <STRONG>getch</STRONG> and
- causes it to return ERR with <STRONG>errno</STRONG> set to <STRONG>EINTR</STRONG>. Under
- the <STRONG>ncurses</STRONG> implementation, handled signals never inter-
- rupt <STRONG>getch</STRONG>.
+ causes it to return ERR with <STRONG>errno</STRONG> set to <STRONG>EINTR</STRONG>.
The <STRONG>has_key</STRONG> function is unique to <STRONG>ncurses</STRONG>. We recommend
that any code using it be conditionalized on the <STRONG>NCURS-</STRONG>
projects / ncurses.git / blobdiff