ncurses 6.0 - patch 20150725

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

diff --git a/man/resizeterm.3x b/man/resizeterm.3x
index da5d84df74863b5f8a363f2f821c819851559c02..177e7057ba8e87dd45e744d14fbece80f4a13b5e 100644 (file)
--- a/man/resizeterm.3x
+++ b/man/resizeterm.3x
@@ -1,5 +1,5 @@
 .\"***************************************************************************
-.\" Copyright (c) 1998-2002,2003 Free Software Foundation, Inc.              *
+.\" Copyright (c) 1998-2013,2015 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            *
@@ -26,30 +26,35 @@
 .\" authorization.                                                           *
 .\"***************************************************************************
 .\"
-.\" Author: Thomas E. Dickey 1996,1997,2002
+.\" Author: Thomas E. Dickey 1996-on
 .\"
-.\" $Id: resizeterm.3x,v 1.10 2003/10/25 20:41:08 tom Exp $
+.\" $Id: resizeterm.3x,v 1.19 2015/06/06 23:38:18 tom Exp $
 .TH resizeterm 3X ""
 .SH NAME
 \fBis_term_resized\fR,
 \fBresize_term\fR,
-\fBresizeterm\fR - change the curses terminal size
+\fBresizeterm\fR \- change the curses terminal size
 .SH SYNOPSIS
 \fB#include <curses.h>\fR
-
+.sp
 \fBbool is_term_resized(int lines, int columns);\fR
 .br
 \fBint resize_term(int lines, int columns);\fR
 .br
 \fBint resizeterm(int lines, int columns);\fR
 .SH DESCRIPTION
+.PP
 This is an extension to the curses library.
 It provides callers with a hook into the \fBncurses\fR data to resize windows,
 primarily for use by programs running in an X Window terminal (e.g., xterm).
+.SS resizeterm
+.PP
 The function \fBresizeterm\fR resizes the standard and current windows
 to the specified dimensions, and adjusts other bookkeeping data used by
-the \fBncurses\fR library that record the window dimensions.
-
+the \fBncurses\fR library that record the window dimensions
+such as the \fBLINES\fP and \fBCOLS\fP variables.
+.SS resize_term
+.PP
 Most of the work is done by the inner function \fBresize_term\fR.
 The outer function \fBresizeterm\fR adds bookkeeping for the SIGWINCH handler.
 When resizing the windows,
@@ -59,12 +64,13 @@ The \fBresize_term\fR function attempts to resize all windows.
 However, due to the calling convention of pads,
 it is not possible to resize these
 without additional interaction with the application.
-
+.SS is_term_resized
+.PP
 A support function \fBis_term_resized\fR is provided so that applications
 can check if the \fBresize_term\fR function would modify the window structures.
-It returns TRUE if the windows would be modified, and FALSE otherwise.
+It returns \fBTRUE\fP if the windows would be modified, and \fBFALSE\fP otherwise.
 .SH RETURN VALUE
-Except as notes, these function return
+Except as noted, these functions return
 the integer \fBERR\fR upon failure and \fBOK\fR on success.
 They will fail if either of the dimensions are less than or equal to zero,
 or if an error occurs while (re)allocating memory for the windows.
@@ -75,18 +81,20 @@ context where \fBmalloc\fR or \fBrealloc\fR may have been interrupted,
 since it uses those functions.
 .PP
 If ncurses is configured to supply its own SIGWINCH handler,
-the \fBresizeterm\fR function ungetch's a \fBKEY_RESIZE\fR which
+the \fBresizeterm\fR function \fBungetch\fP's a \fBKEY_RESIZE\fR which
 will be read on the next call to \fBgetch\fR.
 This is used to alert an application that the screen size has changed,
 and that it should repaint special features such as pads that cannot
 be done automatically.
+.PP
+If the environment variables \fBLINES\fP or \fBCOLUMNS\fP are set,
+this overrides the library's use of the window size obtained from
+the operating system.
+Thus, even if a SIGWINCH is received,
+no screen size change may be recorded.
 .SH SEE ALSO
+\fBcurs_getch\fR(3X),
+\fBcurs_variables\fR(3X),
 \fBwresize\fR(3X).
 .SH AUTHOR
 Thomas Dickey (from an equivalent function written in 1988 for BSD curses).
-.\"#
-.\"# The following sets edit modes for GNU EMACS
-.\"# Local Variables:
-.\"# mode:nroff
-.\"# fill-column:79
-.\"# End: