<!--
****************************************************************************
- * Copyright 2018-2022,2023 Thomas E. Dickey *
+ * Copyright 2018-2023,2024 Thomas E. Dickey *
* Copyright 1998-2010,2017 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************
- * @Id: curs_getstr.3x,v 1.49 2023/10/07 21:19:07 tom Exp @
+ * @Id: curs_getstr.3x,v 1.65 2024/06/08 21:04:32 tom Exp @
-->
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="generator" content="Manpage converted by man2html - see https://invisible-island.net/scripts/readme.html#others_scripts">
-<TITLE>curs_getstr 3x 2023-10-07 ncurses 6.4 Library calls</TITLE>
+<TITLE>curs_getstr 3x 2024-06-08 ncurses 6.5 Library calls</TITLE>
<link rel="author" href="mailto:bug-ncurses@gnu.org">
</HEAD>
<BODY>
-<H1 class="no-header">curs_getstr 3x 2023-10-07 ncurses 6.4 Library calls</H1>
+<H1 class="no-header">curs_getstr 3x 2024-06-08 ncurses 6.5 Library calls</H1>
<PRE>
<STRONG><A HREF="curs_getstr.3x.html">curs_getstr(3x)</A></STRONG> Library calls <STRONG><A HREF="curs_getstr.3x.html">curs_getstr(3x)</A></STRONG>
letting the application prevent overflow of the input buffer.
-</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
- Any of these functions other than <STRONG>wgetnstr</STRONG> may be macros.
-
- Using <STRONG>getstr</STRONG>, <STRONG>mvgetstr</STRONG>, <STRONG>mvwgetstr</STRONG>, or <STRONG>wgetstr</STRONG> to read a line that
- overflows the array pointed to by <STRONG>str</STRONG> causes undefined results. The
- use of <STRONG>getnstr</STRONG>, <STRONG>mvgetnstr</STRONG>, <STRONG>mvwgetnstr</STRONG>, or <STRONG>wgetnstr</STRONG>, respectively, is
- recommended.
-
-
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
- All of these functions return the integer <STRONG>OK</STRONG> upon successful
+ All of these functions return the integer <STRONG>OK</STRONG> upon successful
completion. (SVr4 specifies only "an integer value other than <STRONG>ERR</STRONG>") If
unsuccessful, they return <STRONG>ERR</STRONG>.
X/Open defines no error conditions.
- In this implementation, these functions return an error
+ In this implementation, these functions return <STRONG>ERR</STRONG>
<STRONG>o</STRONG> if the window pointer is null,
<STRONG>o</STRONG> if the associated call to <STRONG>wgetch</STRONG> failed.
- This implementation provides an extension as well. If a <STRONG>SIGWINCH</STRONG>
- interrupts the function, it will return <STRONG>KEY_RESIZE</STRONG> rather than <STRONG>OK</STRONG> or
+ This implementation provides an extension as well. If a <STRONG>SIGWINCH</STRONG>
+ interrupts the function, it will return <STRONG>KEY_RESIZE</STRONG> rather than <STRONG>OK</STRONG> or
<STRONG>ERR</STRONG>.
- Functions with a "mv" prefix first perform a cursor movement using
- <STRONG>wmove</STRONG>, and return an error if the position is outside the window, or if
- the window pointer is null.
+ Functions prefixed with "mv" first perform cursor movement and fail if
+ the position (<EM>y</EM>, <EM>x</EM>) is outside the window boundaries.
-</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
- These functions are described in The Single Unix Specification, Version
- 2. No error conditions are defined.
+</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
+ Any of these functions other than <STRONG>wgetnstr</STRONG> may be macros.
+
+ Using <STRONG>getstr</STRONG>, <STRONG>mvgetstr</STRONG>, <STRONG>mvwgetstr</STRONG>, or <STRONG>wgetstr</STRONG> to read a line that
+ overflows the array pointed to by <STRONG>str</STRONG> causes undefined results. The
+ use of <STRONG>getnstr</STRONG>, <STRONG>mvgetnstr</STRONG>, <STRONG>mvwgetnstr</STRONG>, or <STRONG>wgetnstr</STRONG>, respectively, is
+ recommended.
+
- This implementation returns <STRONG>ERR</STRONG> if the window pointer is null, or if
- the lower-level <STRONG><A HREF="curs_getch.3x.html">wgetch(3x)</A></STRONG> call returns an <STRONG>ERR</STRONG>.
+</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
+ X/Open Curses, Issue 4 describes these functions. It specifies no
+ error conditions for them.
SVr3 and early SVr4 curses implementations did not reject function
keys; the SVr4.0 documentation claimed that "special keys" (such as
documented in SVr4.
X/Open Curses, Issue 5 (2007) stated that these functions "read at most
- <EM>n</EM> bytes" but did not state whether the terminating NUL is counted in
+ <EM>n</EM> bytes" but did not state whether the terminating NUL counted toward
that limit. X/Open Curses, Issue 7 (2009) changed that to say they
"read at most <EM>n</EM>-1 bytes" to allow for the terminating NUL. As of 2018,
some implementations count it, some do not:
- <STRONG>o</STRONG> ncurses 6.1 and PDCurses do not count the NUL in the given limit,
+ <STRONG>o</STRONG> <EM>ncurses</EM> 6.1 and PDCurses do not count the NUL in the given limit,
while
<STRONG>o</STRONG> Solaris SVr4 and NetBSD curses count the NUL as part of the limit.
A comment in NetBSD's source code states that this is specified in
SUSv2.
- <STRONG>o</STRONG> ncurses (before 6.2) assumes no particular limit for the result
+ <STRONG>o</STRONG> <EM>ncurses</EM> (before 6.2) assumes no particular limit for the result
from <STRONG>wgetstr</STRONG>, and treats the <EM>n</EM> parameter of <STRONG>wgetnstr</STRONG> like SVr4
curses.
- <STRONG>o</STRONG> ncurses 6.2 uses <STRONG>LINE_MAX</STRONG>, or a larger (system-dependent) value
+ <STRONG>o</STRONG> <EM>ncurses</EM> 6.2 uses <STRONG>LINE_MAX</STRONG>, or a larger (system-dependent) value
which the <STRONG>sysconf</STRONG> function may provide. If neither <STRONG>LINE_MAX</STRONG> or
- <STRONG>sysconf</STRONG> is available, ncurses uses the POSIX value for <STRONG>LINE_MAX</STRONG> (a
+ <STRONG>sysconf</STRONG> is available, <EM>ncurses</EM> uses the POSIX value for <STRONG>LINE_MAX</STRONG> (a
2048 byte limit). In either case, it reserves a byte for the
terminating NUL.
caller into account when deciding whether to handle echoing within
<STRONG>getnstr</STRONG> or as a side-effect of the <STRONG>getch</STRONG> calls.
- <STRONG>o</STRONG> The original ncurses (as <EM>pcurses</EM> in 1986) set <STRONG>noraw</STRONG> and <STRONG>cbreak</STRONG> when
+ <STRONG>o</STRONG> The original <EM>ncurses</EM> (as <EM>pcurses</EM> in 1986) set <STRONG>noraw</STRONG> and <STRONG>cbreak</STRONG> when
accepting input for <STRONG>getnstr</STRONG>. That may have been done to make
- function- and cursor-keys work; it is not necessary with ncurses.
+ function- and cursor-keys work; it is not necessary with <EM>ncurses</EM>.
- Since 1995, ncurses has provided signal handlers for INTR and QUIT
+ Since 1995, <EM>ncurses</EM> has provided signal handlers for INTR and QUIT
(e.g., <STRONG>^C</STRONG> or <STRONG>^\</STRONG>). With the <STRONG>noraw</STRONG> and <STRONG>cbreak</STRONG> settings, those may
catch a signal and stop the program, where other implementations
allow one to enter those characters in the buffer.
- <STRONG>o</STRONG> Starting in 2021 (ncurses 6.3), <STRONG>getnstr</STRONG> sets <STRONG>raw</STRONG>, rather than <STRONG>noraw</STRONG>
+ <STRONG>o</STRONG> Starting in 2021 (<EM>ncurses</EM> 6.3), <STRONG>getnstr</STRONG> sets <STRONG>raw</STRONG>, rather than <STRONG>noraw</STRONG>
and <STRONG>cbreak</STRONG> for better compatibility with SVr4-curses, e.g.,
allowing one to enter a <STRONG>^C</STRONG> into the buffer.
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
+ <STRONG><A HREF="curs_get_wstr.3x.html">curs_get_wstr(3x)</A></STRONG> describes comparable functions of the <EM>ncurses</EM> library
+ in its wide-character configuration (<EM>ncursesw</EM>).
+
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_getch.3x.html">curs_getch(3x)</A></STRONG>, <STRONG><A HREF="curs_termattrs.3x.html">curs_termattrs(3x)</A></STRONG>, <STRONG><A HREF="curs_variables.3x.html">curs_variables(3x)</A></STRONG>
-ncurses 6.
4 2023-10-07 <STRONG><A HREF="curs_getstr.3x.html">curs_getstr(3x)</A></STRONG>
+ncurses 6.
5 2024-06-08 <STRONG><A HREF="curs_getstr.3x.html">curs_getstr(3x)</A></STRONG>
</PRE>
<div class="nav">
<ul>
<li><a href="#h2-NAME">NAME</a></li>
<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
<li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
-<li><a href="#h2-NOTES">NOTES</a></li>
<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
+<li><a href="#h2-NOTES">NOTES</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
</ul>
projects / ncurses.git / blobdiff