vasilito
ff4ff35918
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
639 lines
17 KiB
Plaintext
639 lines
17 KiB
Plaintext
'\" t
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.\"***************************************************************************
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.\" Copyright 2021-2024,2025 Thomas E. Dickey *
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.\" Copyright 2008-2015,2017 Free Software Foundation, Inc. *
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.\" *
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.\" Permission is hereby granted, free of charge, to any person obtaining a *
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.\" copy of this software and associated documentation files (the *
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.\" "Software"), to deal in the Software without restriction, including *
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.\" without limitation the rights to use, copy, modify, merge, publish, *
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.\" distribute, distribute with modifications, sublicense, and/or sell *
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.\" copies of the Software, and to permit persons to whom the Software is *
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.\" furnished to do so, subject to the following conditions: *
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.\" *
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.\" The above copyright notice and this permission notice shall be included *
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.\" in all copies or substantial portions of the Software. *
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.\" *
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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.\" IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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.\" DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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.\" OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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.\" THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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.\" *
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.\" Except as contained in this notice, the name(s) of the above copyright *
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.\" holders shall not be used in advertising or otherwise to promote the *
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.\" sale, use or other dealings in this Software without prior written *
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.\" authorization. *
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.\"***************************************************************************
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.\"
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.\" $Id: curs_threads.3x,v 1.59 2025/02/15 19:41:22 tom Exp $
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.TH curs_threads 3X 2025-02-15 "ncurses @NCURSES_MAJOR@.@NCURSES_MINOR@" "Library calls"
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.ie \n(.g \{\
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.ds `` \(lq
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.ds '' \(rq
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.\}
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.el \{\
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.ie t .ds `` ``
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.el .ds `` ""
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.ie t .ds '' ''
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.el .ds '' ""
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.\}
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.
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.de bP
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.ie n .IP \(bu 4
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.el .IP \(bu 2
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..
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.SH NAME
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\fI\%NCURSES_WINDOW_CB\fP,
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\fI\%NCURSES_SCREEN_CB\fP,
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\fB\%get_escdelay\fP,
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\fB\%set_escdelay\fP,
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\fB\%set_tabsize\fP,
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\fB\%use_screen\fP,
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\fB\%use_window\fP \-
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\fIcurses\fR support for multi-threaded applications
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.SH SYNOPSIS
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.nf
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\fB#include <curses.h>
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.PP
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\fI/* data types */
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\fBtypedef int (*NCURSES_WINDOW_CB)(WINDOW *, void *);
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\fBtypedef int (*NCURSES_SCREEN_CB)(SCREEN *, void *);
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.PP
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\fBint get_escdelay(void);
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\fBint set_escdelay(int \fIms\fP);
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\fBint set_tabsize(int \fIcols\fP);
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.PP
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\fBint use_screen(SCREEN *\fIscr\fP, NCURSES_SCREEN_CB \fIfunc\fP, void *\fIdata\fP);
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\fBint use_window(WINDOW *\fIwin\fP, NCURSES_WINDOW_CB \fIfunc\fP, void *\fIdata\fP);
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.fi
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.SH DESCRIPTION
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The \fI\%ncurses\fP library can be configured to support multi-threaded
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applications in a rudimentary way.
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Such configuration produces a different set of libraries,
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named \fIlibncursest\fP,
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for example,
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since doing so alters \fI\%ncurses\fP's application binary interface
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(ABI).
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.PP
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Instead of modifying the programming interface (API) to make
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\fI\%ncurses\fP functions expect an additional argument specifying a
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thread,
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the library adds functions,
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usable in any configuration,
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that hide the \fImutexes\fP
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(mutual exclusion locks)
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needed to prevent concurrent access to variables shared by multiple
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threads of execution.
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.PP
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\fI\%ncurses\fP threading support requires the use of functions to
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access members of the \fI\%WINDOW\fP structure (see
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\fBcurs_opaque\fP(3X)).
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It further makes functions of the common global variables
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\fB\%COLORS\fP,
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\fB\%COLOR_PAIRS\fP,
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\fB\%COLS\fP,
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\fB\%ESCDELAY\fP,
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\fB\%LINES\fP,
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\fB\%TABSIZE\fP,
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\fB\%curscr\fP,
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\fB\%newscr\fP,
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and
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\fB\%ttytype\fP,
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maintaining them as read-only values in the \fISCREEN\fP structure.
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.PP
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Even this is not enough to make an application using \fIcurses\fP
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thread-safe.
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We would expect a multi-threaded application to have threads updating
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separate windows (on the same device),
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and separate screens (on different devices).
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Further,
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applications expect a few of the global variables to be writable.
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The functions described here address these special situations.
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.PP
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The \fB\%ESCDELAY\fP and \fB\%TABSIZE\fP global variables are modified
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by some applications.
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To modify them in any configuration,
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use the \fB\%set_escdelay\fP or \fB\%set_tabsize\fP functions.
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Other global variables are not modifiable.
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\fBget_escdelay\fP retrieves \fB\%ESCDELAY\fP's value.
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.PP
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The \fBuse_window\fP and \fBuse_screen\fP functions provide
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coarse-grained mutexes for their respective \fI\%WINDOW\fP and
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\fISCREEN\fP parameters;
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they call a user-supplied function,
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pass it a \fIdata\fP parameter,
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and return the value from the user-supplied function to the application.
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.\" ***************************************************************************
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.SS Usage
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All \fI\%ncurses\fP library functions assume that the locale is not
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altered during operation.
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In addition,
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they use data that is maintained within a hierarchy of scopes.
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.bP
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global data used in the low-level \fIterminfo\fP or \fItermcap\fP
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interfaces
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.bP
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terminal data associated with a call to \fBset_curterm\fP(3X)
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.IP
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Terminal data are initialized when screens are created.
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.bP
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screen data associated with a call to \fBnewterm\fP(3X) or
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\fBinitscr\fP(3X)
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.bP
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window data associated with a call to \fBnewwin\fP(3X) or
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\fBsubwin\fP(3X)
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.IP
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Windows are associated with screens.
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Pads are not necessarily associated with any particular screen.
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.IP
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Most \fIcurses\fP applications operate on one or more windows within a
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single screen.
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.bP
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reentrant data associated with \*(``pure\*('' functions that alter no
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shared variables
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.PP
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The following table lists the scope of each symbol in the
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\fI\%ncurses\fP library when configured to support multi-threaded
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applications.
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.PP
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.TS
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center;
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Lb2 Lb
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Lb2 Lx.
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Symbol Scope
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_
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BC global
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COLORS screen (read-only)
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COLOR_PAIR reentrant
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COLOR_PAIRS screen (read-only)
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COLS screen (read-only)
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ESCDELAY screen (read-only; see \fBset_escdelay\fP)
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LINES screen (read-only)
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PAIR_NUMBER reentrant
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PC global
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SP global
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TABSIZE screen (read-only; see \fBset_tabsize\fP)
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UP global
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acs_map screen (read-only)
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add_wch window (\fBstdscr\fP)
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add_wchnstr window (\fBstdscr\fP)
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add_wchstr window (\fBstdscr\fP)
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addch window (\fBstdscr\fP)
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addchnstr window (\fBstdscr\fP)
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addchstr window (\fBstdscr\fP)
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addnstr window (\fBstdscr\fP)
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addnwstr window (\fBstdscr\fP)
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addstr window (\fBstdscr\fP)
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addwstr window (\fBstdscr\fP)
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assume_default_colors screen
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attr_get window (\fBstdscr\fP)
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attr_off window (\fBstdscr\fP)
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attr_on window (\fBstdscr\fP)
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attr_set window (\fBstdscr\fP)
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attroff window (\fBstdscr\fP)
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attron window (\fBstdscr\fP)
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attrset window (\fBstdscr\fP)
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baudrate screen
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beep screen
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bkgd window (\fBstdscr\fP)
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bkgdset window (\fBstdscr\fP)
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bkgrnd window (\fBstdscr\fP)
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bkgrndset window (\fBstdscr\fP)
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boolcodes global (read-only)
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boolfnames global (read-only)
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boolnames global (read-only)
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border window (\fBstdscr\fP)
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border_set window (\fBstdscr\fP)
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box window (\fBstdscr\fP)
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box_set window (\fBstdscr\fP)
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can_change_color terminal
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cbreak screen
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chgat window (\fBstdscr\fP)
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clear window (\fBstdscr\fP)
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clearok window
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clrtobot window (\fBstdscr\fP)
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clrtoeol window (\fBstdscr\fP)
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color_content screen
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color_set window (\fBstdscr\fP)
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copywin window (locks source, target)
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cur_term terminal
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curs_set screen
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curscr screen (read-only)
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curses_version global (read-only)
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def_prog_mode terminal
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def_shell_mode terminal
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define_key screen
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del_curterm screen
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delay_output screen
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delch window (\fBstdscr\fP)
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deleteln window (\fBstdscr\fP)
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delscreen global (locks screen list, screen)
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delwin global (locks window list)
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derwin screen
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doupdate screen
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dupwin screen (locks window)
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echo screen
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echo_wchar window (\fBstdscr\fP)
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echochar window (\fBstdscr\fP)
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endwin screen
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erase window (\fBstdscr\fP)
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erasechar window (\fBstdscr\fP)
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erasewchar window (\fBstdscr\fP)
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filter global
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flash terminal
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flushinp screen
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get_wch screen (input operation)
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get_wstr screen (input operation)
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getattrs window
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getbegx window
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getbegy window
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getbkgd window
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getbkgrnd window
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getcchar reentrant
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getch screen (input operation)
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getcurx window
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getcury window
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getmaxx window
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getmaxy window
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getmouse screen (input operation)
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getn_wstr screen (input operation)
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getnstr screen (input operation)
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getparx window
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getpary window
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getstr screen (input operation)
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getwin screen (input operation)
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halfdelay screen
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has_colors terminal
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has_ic terminal
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has_il terminal
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has_key screen
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hline window (\fBstdscr\fP)
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hline_set window (\fBstdscr\fP)
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idcok window
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idlok window
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immedok window
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in_wch window (\fBstdscr\fP)
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in_wchnstr window (\fBstdscr\fP)
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in_wchstr window (\fBstdscr\fP)
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inch window (\fBstdscr\fP)
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inchnstr window (\fBstdscr\fP)
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inchstr window (\fBstdscr\fP)
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init_color screen
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init_pair screen
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initscr global (locks screen list)
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innstr window (\fBstdscr\fP)
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innwstr window (\fBstdscr\fP)
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ins_nwstr window (\fBstdscr\fP)
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ins_wch window (\fBstdscr\fP)
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ins_wstr window (\fBstdscr\fP)
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insch window (\fBstdscr\fP)
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insdelln window (\fBstdscr\fP)
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insertln window (\fBstdscr\fP)
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insnstr window (\fBstdscr\fP)
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insstr window (\fBstdscr\fP)
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instr window (\fBstdscr\fP)
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intrflush terminal
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inwstr window (\fBstdscr\fP)
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is_cleared window
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is_idcok window
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is_idlok window
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is_immedok window
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is_keypad window
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is_leaveok window
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is_linetouched window
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is_nodelay window
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is_notimeout window
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is_scrollok window
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is_syncok window
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is_term_resized terminal
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is_wintouched window
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isendwin screen
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key_defined screen
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key_name global (static data)
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keybound screen
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keyname global (static data)
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keyok screen
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keypad window
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killchar terminal
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killwchar terminal
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leaveok window
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longname screen
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mcprint terminal
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meta screen
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mouse_trafo window (\fBstdscr\fP)
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mouseinterval screen
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mousemask screen
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move window (\fBstdscr\fP)
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mvadd_wch window (\fBstdscr\fP)
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mvadd_wchnstr window (\fBstdscr\fP)
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mvadd_wchstr window (\fBstdscr\fP)
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mvaddch window (\fBstdscr\fP)
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mvaddchnstr window (\fBstdscr\fP)
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mvaddchstr window (\fBstdscr\fP)
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mvaddnstr window (\fBstdscr\fP)
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mvaddnwstr window (\fBstdscr\fP)
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mvaddstr window (\fBstdscr\fP)
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mvaddwstr window (\fBstdscr\fP)
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mvchgat window (\fBstdscr\fP)
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mvcur screen
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mvdelch window (\fBstdscr\fP)
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mvderwin window (\fBstdscr\fP)
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mvget_wch screen (input operation)
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mvget_wstr screen (input operation)
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mvgetch screen (input operation)
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mvgetn_wstr screen (input operation)
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mvgetnstr screen (input operation)
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mvgetstr screen (input operation)
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mvhline window (\fBstdscr\fP)
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mvhline_set window (\fBstdscr\fP)
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mvin_wch window (\fBstdscr\fP)
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mvin_wchnstr window (\fBstdscr\fP)
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mvin_wchstr window (\fBstdscr\fP)
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mvinch window (\fBstdscr\fP)
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mvinchnstr window (\fBstdscr\fP)
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mvinchstr window (\fBstdscr\fP)
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mvinnstr window (\fBstdscr\fP)
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mvinnwstr window (\fBstdscr\fP)
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mvins_nwstr window (\fBstdscr\fP)
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mvins_wch window (\fBstdscr\fP)
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mvins_wstr window (\fBstdscr\fP)
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mvinsch window (\fBstdscr\fP)
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mvinsnstr window (\fBstdscr\fP)
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mvinsstr window (\fBstdscr\fP)
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mvinstr window (\fBstdscr\fP)
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mvinwstr window (\fBstdscr\fP)
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mvprintw window (\fBstdscr\fP)
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mvscanw screen
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mvvline window (\fBstdscr\fP)
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mvvline_set window (\fBstdscr\fP)
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mvwadd_wch window
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mvwadd_wchnstr window
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mvwadd_wchstr window
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mvwaddch window
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mvwaddchnstr window
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mvwaddchstr window
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mvwaddnstr window
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mvwaddnwstr window
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mvwaddstr window
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mvwaddwstr window
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mvwchgat window
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mvwdelch window
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mvwget_wch screen (input operation)
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mvwget_wstr screen (input operation)
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mvwgetch screen (input operation)
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mvwgetn_wstr screen (input operation)
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mvwgetnstr screen (input operation)
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mvwgetstr screen (input operation)
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mvwhline window
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mvwhline_set window
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mvwin window
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mvwin_wch window
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mvwin_wchnstr window
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mvwin_wchstr window
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mvwinch window
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mvwinchnstr window
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mvwinchstr window
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mvwinnstr window
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mvwinnwstr window
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mvwins_nwstr window
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mvwins_wch window
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mvwins_wstr window
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mvwinsch window
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mvwinsnstr window
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mvwinsstr window
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mvwinstr window
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mvwinwstr window
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mvwprintw window
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mvwscanw screen
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mvwvline window
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mvwvline_set window
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napms reentrant
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newpad global (locks window list)
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newscr screen (read-only)
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newterm global (locks screen list)
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newwin global (locks window list)
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nl screen
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nocbreak screen
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nodelay window
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noecho screen
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nofilter global
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nonl screen
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noqiflush terminal
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noraw screen
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notimeout window
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numcodes global (read-only)
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numfnames global (read-only)
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numnames global (read-only)
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ospeed global
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overlay window (locks source, target)
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overwrite window (locks source, target)
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pair_content screen
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pecho_wchar screen
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pechochar screen
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pnoutrefresh screen
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prefresh screen
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printw window
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putp global
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putwin window
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qiflush terminal
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raw screen
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redrawwin window
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refresh screen
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reset_prog_mode screen
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reset_shell_mode screen
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resetty terminal
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resize_term screen (locks window list)
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resizeterm screen
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restartterm screen
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ripoffline global (static data)
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savetty terminal
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scanw screen
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scr_dump screen
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scr_init screen
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scr_restore screen
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scr_set screen
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scrl window (\fBstdscr\fP)
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scroll window
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scrollok window
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set_curterm screen
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set_escdelay screen
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set_tabsize screen
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set_term global (locks screen list, screen)
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setcchar reentrant
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setscrreg window (\fBstdscr\fP)
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setupterm global
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slk_attr screen
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slk_attr_off screen
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slk_attr_on screen
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slk_attr_set screen
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slk_attroff screen
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slk_attron screen
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slk_attrset screen
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slk_clear screen
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slk_color screen
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slk_init screen
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slk_label screen
|
|
slk_noutrefresh screen
|
|
slk_refresh screen
|
|
slk_restore screen
|
|
slk_set screen
|
|
slk_touch screen
|
|
slk_wset screen
|
|
standend window
|
|
standout window
|
|
start_color screen
|
|
\fBstdscr\fP screen (read-only)
|
|
strcodes global (read-only)
|
|
strfnames global (read-only)
|
|
strnames global (read-only)
|
|
subpad window
|
|
subwin window
|
|
syncok window
|
|
term_attrs screen
|
|
termattrs screen
|
|
termname terminal
|
|
tgetent global
|
|
tgetflag global
|
|
tgetnum global
|
|
tgetstr global
|
|
tgoto global
|
|
tigetflag terminal
|
|
tigetnum terminal
|
|
tigetstr terminal
|
|
timeout window (\fBstdscr\fP)
|
|
touchline window
|
|
touchwin window
|
|
tparm global (static data)
|
|
tputs screen
|
|
trace global (static data)
|
|
ttytype screen (read-only)
|
|
typeahead screen
|
|
unctrl screen
|
|
unget_wch screen (input operation)
|
|
ungetch screen (input operation)
|
|
ungetmouse screen (input operation)
|
|
untouchwin window
|
|
use_default_colors screen
|
|
use_env global (static data)
|
|
use_extended_names global (static data)
|
|
use_legacy_coding screen
|
|
use_screen global (locks screen list, screen)
|
|
use_window global (locks window list, window)
|
|
vid_attr screen
|
|
vid_puts screen
|
|
vidattr screen
|
|
vidputs screen
|
|
vline window (\fBstdscr\fP)
|
|
vline_set window (\fBstdscr\fP)
|
|
vw_printw window
|
|
vw_scanw screen
|
|
vwprintw window
|
|
vwscanw screen
|
|
wadd_wch window
|
|
wadd_wchnstr window
|
|
wadd_wchstr window
|
|
waddch window
|
|
waddchnstr window
|
|
waddchstr window
|
|
waddnstr window
|
|
waddnwstr window
|
|
waddstr window
|
|
waddwstr window
|
|
wattr_get window
|
|
wattr_off window
|
|
wattr_on window
|
|
wattr_set window
|
|
wattroff window
|
|
wattron window
|
|
wattrset window
|
|
wbkgd window
|
|
wbkgdset window
|
|
wbkgrnd window
|
|
wbkgrndset window
|
|
wborder window
|
|
wborder_set window
|
|
wchgat window
|
|
wclear window
|
|
wclrtobot window
|
|
wclrtoeol window
|
|
wcolor_set window
|
|
wcursyncup screen (affects window plus parents)
|
|
wdelch window
|
|
wdeleteln window
|
|
wecho_wchar window
|
|
wechochar window
|
|
wenclose window
|
|
werase window
|
|
wget_wch screen (input operation)
|
|
wget_wstr screen (input operation)
|
|
wgetbkgrnd window
|
|
wgetch screen (input operation)
|
|
wgetdelay window
|
|
wgetn_wstr screen (input operation)
|
|
wgetnstr screen (input operation)
|
|
wgetparent window
|
|
wgetscrreg window
|
|
wgetstr screen (input operation)
|
|
whline window
|
|
whline_set window
|
|
win_wch window
|
|
win_wchnstr window
|
|
win_wchstr window
|
|
winch window
|
|
winchnstr window
|
|
winchstr window
|
|
winnstr window
|
|
winnwstr window
|
|
wins_nwstr window
|
|
wins_wch window
|
|
wins_wstr window
|
|
winsch window
|
|
winsdelln window
|
|
winsertln window
|
|
winsnstr window
|
|
winsstr window
|
|
winstr window
|
|
winwstr window
|
|
wmouse_trafo window
|
|
wmove window
|
|
wnoutrefresh screen
|
|
wprintw window
|
|
wredrawln window
|
|
wrefresh screen
|
|
wresize window (locks window list)
|
|
wscanw screen
|
|
wscrl window
|
|
wsetscrreg window
|
|
wstandend window
|
|
wstandout window
|
|
wsyncdown screen (affects window plus parents)
|
|
wsyncup screen (affects window plus parents)
|
|
wtimeout window
|
|
wtouchln window
|
|
wunctrl global (static data)
|
|
wvline window
|
|
wvline_set window
|
|
.TE
|
|
.\" ***************************************************************************
|
|
.SH RETURN VALUE
|
|
\fB\%get_escdelay\fP returns the value of \fB\%ESCDELAY\fP.
|
|
\fB\%set_escdelay\fP and \fB\%set_tabsize\fP return \fBERR\fP upon
|
|
failure and \fBOK\fP upon successful completion.
|
|
\fB\%use_screen\fP and \fB\%use_window\fP return the \fIint\fP returned
|
|
by the user-supplied function they are called with.
|
|
.SH NOTES
|
|
\fI\%ncurses\fP provides both a C function and a preprocessor macro for
|
|
each function documented in this page.
|
|
.SH PORTABILITY
|
|
These routines are specific to \fI\%ncurses\fP.
|
|
They were not supported on Version 7, BSD or System V implementations.
|
|
It is recommended that any code depending on \fI\%ncurses\fP extensions
|
|
be conditioned using \fB\%NCURSES_VERSION\fP.
|
|
.SH SEE ALSO
|
|
\fB\%curses\fP(3X),
|
|
\fB\%curs_opaque\fP(3X),
|
|
\fB\%curs_variables\fP(3X)
|