X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=doc%2Fhtml%2Fman%2Fcurs_termcap.3x.html;h=1c756c69cffdd429d419ed0a8497debb4638882f;hp=e947f713731a9d08bc789c9963db42990a0a8fb7;hb=54d0d62f0eb759e3c623a215d98ddebccca64488;hpb=460005b642d978c6d4b48810803514bd36a6245b
diff --git a/doc/html/man/curs_termcap.3x.html b/doc/html/man/curs_termcap.3x.html
index e947f713..1c756c69 100644
--- a/doc/html/man/curs_termcap.3x.html
+++ b/doc/html/man/curs_termcap.3x.html
@@ -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 1.44 2020/05/17 01:20:13 tom Exp @
-->
@@ -195,6 +195,8 @@
+
+
These functions are provided for supporting legacy applications, and
should not be used in new programs:
@@ -213,6 +215,8 @@
bility with the termcap library, that is a defect in XCurses, Issue 4,
Version 2 rather than in ncurses.
+
+
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-
@@ -237,6 +241,60 @@
against extended capability names which are longer than two charac-
ters.
+ The BSD termcap function tgetent 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.
+
+
+
+ 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:
+
+ o One was used internally by the jove editor in 2BSD through 4.4BSD.
+ It defined global symbols for the termcap variables which it used.
+
+ o The other appeared in 4.4BSD Lite Release 2 (mid-1993) as part of
+ libedit (also known as the editline library). The CSRG source his-
+ tory shows that this was added in mid-1992. The libedit header
+ file was used internally, as a convenience for compiling the edit-
+ line library. It declared function prototypes, but no global vari-
+ ables.
+
+ The header file from libedit 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 const 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 tputs also differed, but in
+ that instance, it was libedit which differed from BSD termcap.
+
+ A copy of GNU termcap 1.3 was bundled with bash in mid-1993, to support
+ the readline library.
+
+ A termcap.h file was provided in ncurses 1.8.1 (November 1993). That
+ reflected influence by emacs (rather than jove) and GNU termcap:
+
+ o it provided declarations for a few global symbols used by emacs
+
+ o it provided function prototypes (using const).
+
+ o a prototype for tparam (a GNU termcap feature) was provided.
+
+ Later (in mid-1996) the tparam 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.
+
curses(3x), terminfo(5), term_variables(3x), putc(3).
@@ -261,7 +319,13 @@
RETURN VALUE
BUGS
-PORTABILITY
+PORTABILITY
+
+
SEE ALSO