'\" te
.\"  Copyright (c) 1990, 1995 by Mortice Kern Systems Inc.  All Rights Reserved  Portions Copyright (c) 1996, Sun Microsystems, Inc.  All Rights Reserved
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
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.TH NOTIMEOUT 3XCURSES "Jun 5, 2002"
.SH NAME
notimeout, timeout, wtimeout \- set timed blocking or non-blocking read
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [ \fIflag\fR... ] \fIfile\fR... \fB-I\fR /usr/xpg4/include \fB -L \fR /usr/xpg4/lib \e
\fB -R \fR /usr/xpg4/lib \fB -lcurses \fR [ \fIlibrary\fR... ]

\fBc89\fR [ \fIflag\fR... ] \fIfile\fR... \fB-lcurses\fR [ \fIlibrary\fR... ]

#include <curses.h>

\fBint\fR \fBnotimeout\fR(\fBWINDOW *\fR\fIwin\fR, \fBbool\fR \fIbf\fR);
.fi

.LP
.nf
\fBvoid\fR \fBtimeout\fR(\fBint\fR \fIdelay\fR);
.fi

.LP
.nf
\fBvoid\fR \fBwtimeout\fR(\fBWINDOW\fR \fIwin\fR, \fBint\fR \fIdelay\fR);
.fi

.SH PARAMETERS
.sp
.ne 2
.na
\fB\fIwin\fR\fR
.ad
.RS 9n
Is a pointer to the window in which to set the timed blocking.
.RE

.sp
.ne 2
.na
\fB\fIbf\fR\fR
.ad
.RS 9n
Is a Boolean expression.
.RE

.sp
.ne 2
.na
\fB\fIdelay\fR\fR
.ad
.RS 9n
Is the number of milliseconds to block or wait for input.
.RE

.SH DESCRIPTION
.sp
.LP
If \fIbool\fR is \fBTRUE\fR, the \fBnotimeout()\fR function disables a  timer
used by \fBgetch\fR(3XCURSES) when handling multibyte function key sequences.
.sp
.LP
When \fIbool\fR is \fBFALSE\fR and keypad handling is enabled, a timer is  set
by \fBgetch()\fR to handle bytes received that could be the beginning of a
function key (for example, ESC). If the remainder of the sequence is not
received before the time expires, the  first byte is returned; otherwise, the
value of the function key is returned. Subsequent calls to the \fBgetch()\fR
function will return the other bytes received for the incomplete key sequence.
.sp
.LP
The \fBtimeout()\fR and \fBwtimeout()\fR functions set the length of time
\fBgetch()\fR waits for input for windows \fBstdscr\fR and \fIwin\fR,
respectively.  These functions are similar to \fBnodelay\fR(3XCURSES) except
the time to block  or wait for input can be specified.
.sp
.LP
A negative \fIdelay\fR causes the program to wait indefinitely for input; a
\fIdelay\fR of \fB0\fR returns \fBERR\fR if no input is ready; and  a positive
\fIdelay\fR blocks until input arrives or the time specified expires, (in which
case, \fBERR\fR is returned).
.SH RETURN VALUES
.sp
.LP
On success, the \fBnotimeout()\fR function returns \fBOK\fR. Otherwise, it
returns \fBERR\fR.
.sp
.LP
The \fBtimeout()\fR and \fBwtimeout()\fR functions do not return a value.
.SH ERRORS
.sp
.LP
None.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Standard
_
MT-Level	Unsafe
.TE

.SH SEE ALSO
.sp
.LP
.BR getch (3XCURSES),
.BR halfdelay (3XCURSES),
.BR libcurses (3XCURSES),
.BR nodelay (3XCURSES),
.BR attributes (7),
.BR standards (7)