ncurses 6.4 - patch 20230923

[ncurses.git] / man / define_key.3x

diff --git a/man/define_key.3x b/man/define_key.3x
index 79a82052e3bf2b158569448099c92ee18d786a7d..fed925eabd5ed9d8bbf77b1766e9f26d1d5bea4e 100644 (file)
--- a/man/define_key.3x
+++ b/man/define_key.3x
@@ -1,5 +1,6 @@
 .\"***************************************************************************
-.\" Copyright (c) 1998 Free Software Foundation, Inc.                        *
+.\" Copyright 2018-2022,2023 Thomas E. Dickey                                *
+.\" Copyright 1998-2010,2017 Free Software Foundation, Inc.                  *
 .\"                                                                          *
 .\" Permission is hereby granted, free of charge, to any person obtaining a  *
 .\" copy of this software and associated documentation files (the            *
@@ -26,44 +27,42 @@
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"
-.\" Author: Thomas E. Dickey <dickey@clark.net> 1997
+.\" Author: Thomas E. Dickey 1997
 .\"
-.\" $Id: define_key.3x,v 1.4 1998/02/11 12:13:48 tom Exp $
-.TH define_key 3X ""
-.
+.\" $Id: define_key.3x,v 1.34 2023/09/23 23:04:14 tom Exp $
+.TH define_key 3X 2023-09-23 "ncurses 6.4" "Library calls"
 .SH NAME
-\fBdefine_key\fP \- define a keycode
-.
+\fB\%define_key\fP \-
+define a \fIcurses\fR keycode
 .SH SYNOPSIS
 \fB#include <curses.h>\fP
-
-\fBint define_key(char *definition, int keycode);\fP
-.
+.PP
+\fBint define_key(const char *\fIdefinition\fB, int \fIkeycode\fB);\fR
 .SH DESCRIPTION
-This is an extension to the curses library.
+This is an extension to the \fIcurses\fP library.
 It permits an application to define keycodes with their corresponding control
-strings, so that the ncurses library will interpret them just as it would
+strings, so that the \fIncurses\fP library will interpret them just as it would
 the predefined codes in the terminfo database.
 .PP
-If the given string is null, any existing definition for the keycode is
-removed.
-.
+If \fIdefinition\fP is \fBNULL\fP,
+any existing one for the keycode is removed.
+Similarly, if the given keycode is negative or zero, any existing string
+for the given definition is removed.
 .SH RETURN VALUE
-The keycode must be greater than zero, else ERR is returned.
-.
+Either \fIkeycode\fP must be greater than zero,
+or \fIdefinition\fP must be non-\fBNULL\fP,
+otherwise \fBERR\fP is returned.
+\fBERR\fP may also be returned if there is insufficient memory to allocate the
+data to store the definition.
+If no error is detected, \fBOK\fP is returned.
 .SH PORTABILITY
-These routines are specific to ncurses.  They were not supported on
-Version 7, BSD or System V implementations.  It is recommended that
-any code depending on them be conditioned using NCURSES_VERSION.
-.
+These routines are specific to \fIncurses\fP.
+They were not supported on
+Version 7, BSD or System V implementations.
+It is recommended that
+any code depending on them be conditioned using \fB\%NCURSES_VERSION\fP.
 .SH SEE ALSO
-\fBkeyok\fR(3X).
-.
+\fB\%keyok\fP(3X),
+\fB\%key_defined\fP(3X)
 .SH AUTHOR
-Thomas Dickey.
-.\"#
-.\"# The following sets edit modes for GNU EMACS
-.\"# Local Variables:
-.\"# mode:nroff
-.\"# fill-column:79
-.\"# End:
+Thomas Dickey