path: root/doc/html/man/curs_termcap.3x.html
diff options
Diffstat (limited to 'doc/html/man/curs_termcap.3x.html')
1 files changed, 76 insertions, 12 deletions
diff --git a/doc/html/man/curs_termcap.3x.html b/doc/html/man/curs_termcap.3x.html
index e947f713731a..4398f634efd8 100644
--- a/doc/html/man/curs_termcap.3x.html
+++ b/doc/html/man/curs_termcap.3x.html
@@ -1,6 +1,6 @@
- * Copyright 2018-2019,2020 Thomas E. Dickey *
+ * Copyright 2018-2020,2021 Thomas E. Dickey *
* Copyright 1998-2017,2018 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
@@ -27,7 +27,7 @@
* sale, use or other dealings in this Software without prior written *
* authorization. *
- * @Id: curs_termcap.3x,v 1.43 2020/02/02 23:34:34 tom Exp @
+ * @Id: curs_termcap.3x,v 1.48 2021/01/09 11:07:15 tom Exp @
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
@@ -48,7 +48,7 @@
</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
- direct <STRONG>curses</STRONG> interface to the terminfo capability database
+ <STRONG>curses</STRONG> emulation of termcap
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
@@ -60,17 +60,17 @@
- <STRONG>int</STRONG> <STRONG>tgetent(char</STRONG> <STRONG>*bp,</STRONG> <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*name);</STRONG>
- <STRONG>int</STRONG> <STRONG>tgetflag(const</STRONG> <STRONG>char</STRONG> <STRONG>*id);</STRONG>
- <STRONG>int</STRONG> <STRONG>tgetnum(const</STRONG> <STRONG>char</STRONG> <STRONG>*id);</STRONG>
- <STRONG>char</STRONG> <STRONG>*tgetstr(const</STRONG> <STRONG>char</STRONG> <STRONG>*id,</STRONG> <STRONG>char</STRONG> <STRONG>**area);</STRONG>
- <STRONG>int</STRONG> <STRONG>tputs(const</STRONG> <STRONG>char</STRONG> <STRONG>*str,</STRONG> <STRONG>int</STRONG> <STRONG>affcnt,</STRONG> <STRONG>int</STRONG> <STRONG>(*putc)(int));</STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
These routines are included as a conversion aid for programs that use
- the <EM>termcap</EM> library. Their parameters are the same and the routines
+ the <EM>termcap</EM> library. Their parameters are the same, but the routines
are emulated using the <EM>terminfo</EM> database. Thus, they can only be used
to query the capabilities of entries for which a terminfo entry has
been compiled.
@@ -195,6 +195,8 @@
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
+</PRE><H3><a name="h3-Standards">Standards</a></H3><PRE>
These functions are provided for supporting legacy applications, and
should not be used in new programs:
@@ -213,6 +215,8 @@
bility with the <EM>termcap</EM> library, that is a defect in XCurses, Issue 4,
Version 2 rather than in ncurses.
+</PRE><H3><a name="h3-Compatibility-with-BSD-Termcap">Compatibility with BSD Termcap</a></H3><PRE>
External variables are provided for support of certain termcap applica-
tions. However, termcap applications' use of those variables is poorly
documented, e.g., not distinguishing between input and output. In par-
@@ -237,9 +241,63 @@
against extended capability names which are longer than two charac-
+ The BSD termcap function <STRONG>tgetent</STRONG> returns the text of a termcap entry in
+ the buffer passed as an argument. This library (like other terminfo
+ implementations) does not store terminal descriptions as text. It sets
+ the buffer contents to a null-terminated string.
+</PRE><H3><a name="h3-Other-Compatibility">Other Compatibility</a></H3><PRE>
+ This library includes a termcap.h header, for compatibility with other
+ implementations. But the header is rarely used because the other im-
+ plementations are not strictly compatible.
+ The original BSD termcap (through 4.3BSD) had no header file which gave
+ function prototypes, because that was a feature of ANSI C. BSD termcap
+ was written several years before C was standardized. However, there
+ were two different termcap.h header files in the BSD sources:
+ <STRONG>o</STRONG> One was used internally by the <EM>jove</EM> editor in 2BSD through 4.4BSD.
+ It defined global symbols for the termcap variables which it used.
+ <STRONG>o</STRONG> The other appeared in 4.4BSD Lite Release 2 (mid-1993) as part of
+ <EM>libedit</EM> (also known as the <EM>editline</EM> library). The CSRG source his-
+ tory shows that this was added in mid-1992. The <EM>libedit</EM> header
+ file was used internally, as a convenience for compiling the <EM>edit-</EM>
+ <EM>line</EM> library. It declared function prototypes, but no global vari-
+ ables.
+ The header file from <EM>libedit</EM> was added to NetBSD's termcap library in
+ mid-1994.
+ Meanwhile, GNU termcap was under development, starting in 1990. The
+ first release (termcap 1.0) in 1991 included a termcap.h header. The
+ second release (termcap 1.1) in September 1992 modified the header to
+ use <STRONG>const</STRONG> for the function prototypes in the header where one would ex-
+ pect the parameters to be read-only. This was a difference versus the
+ original BSD termcap. The prototype for <STRONG>tputs</STRONG> also differed, but in
+ that instance, it was <EM>libedit</EM> which differed from BSD termcap.
+ A copy of GNU termcap 1.3 was bundled with <EM>bash</EM> in mid-1993, to support
+ the <EM>readline</EM> library.
+ A termcap.h file was provided in ncurses 1.8.1 (November 1993). That
+ reflected influence by <EM>emacs</EM> (rather than <EM>jove</EM>) and GNU termcap:
+ <STRONG>o</STRONG> it provided declarations for a few global symbols used by <EM>emacs</EM>
+ <STRONG>o</STRONG> it provided function prototypes (using <STRONG>const</STRONG>).
+ <STRONG>o</STRONG> a prototype for <STRONG>tparam</STRONG> (a GNU termcap feature) was provided.
+ Later (in mid-1996) the <STRONG>tparam</STRONG> function was removed from ncurses. As a
+ result, there are differences between any of the four implementations,
+ which must be taken into account by programs which can work with all
+ termcap library interfaces.
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
- <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>, <STRONG><A HREF="term_variables.3x.html">term_variables(3x)</A></STRONG>, <STRONG>putc(3)</STRONG>.
+ <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG>putc(3)</STRONG>, <STRONG><A HREF="term_variables.3x.html">term_variables(3x)</A></STRONG>, <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>.
@@ -261,7 +319,13 @@
<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
<li><a href="#h2-BUGS">BUGS</a></li>
-<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
+<li><a href="#h2-PORTABILITY">PORTABILITY</a>
+<li><a href="#h3-Standards">Standards</a></li>
+<li><a href="#h3-Compatibility-with-BSD-Termcap">Compatibility with BSD Termcap</a></li>
+<li><a href="#h3-Other-Compatibility">Other Compatibility</a></li>
<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>