X-Git-Url: http://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=doc%2Fhtml%2Fman%2Ftput.1.html;h=f754de3cc43cc516e812114a65d710c07eb624fe;hp=32a8b22ae05b23b103c8c4210deae926dd8c8b1e;hb=29a36e53e1f77a0c3672f2e267d573823d6a9a60;hpb=4298026c68384077462178f8018c8c1add0c3cdf
diff --git a/doc/html/man/tput.1.html b/doc/html/man/tput.1.html
index 32a8b22a..f754de3c 100644
--- a/doc/html/man/tput.1.html
+++ b/doc/html/man/tput.1.html
@@ -27,7 +27,7 @@
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************
- * @Id: tput.1,v 1.42 2016/07/30 21:01:09 tom Exp @
+ * @Id: tput.1,v 1.44 2016/08/20 23:40:31 tom Exp @
-->
@@ -329,33 +329,51 @@
The tput command was begun by Bill Joy in 1980. The ini-
tial version only cleared the screen.
- Keith Bostic replaced this in 1989 with a new implementa-
- tion based on the AT&T SystemV program tput. Like the
- AT&T program, Bostic's version accepted some parameters
- named for terminfo capabilities (clear, init, longname and
- reset). However (because he had only termcap available),
- it accepted termcap names for other capabilities.
-
- At the same time, Bostic added a shell script named
+ AT&T System V provided a different tput command, whose
+ init and reset subcommands (more than half the program)
+ were incorporated from the reset feature of BSD tset writ-
+ ten by Eric Allman. Later the corresponding source code
+ for reset was removed from the BSD tset (in June 1993,
+ released in 4.4BSD-Lite a year later).
+
+ Keith Bostic replaced the BSD tput command in 1989 with a
+ new implementation based on the AT&T System V program
+ tput. Like the AT&T program, Bostic's version accepted
+ some parameters named for terminfo capabilities (clear,
+ init, longname and reset). However (because he had only
+ termcap available), it accepted termcap names for other
+ capabilities. Also, Bostic's BSD tput did not modify the
+ terminal I/O modes as the earlier BSD tset had done.
+
+ At the same time, Bostic added a shell script named
"clear", which used tput to clear the screen.
- Both of these appeared in 4.4BSD, becoming the "modern"
+ Both of these appeared in 4.4BSD, becoming the "modern"
BSD implementation of tput.
- This implementation of tput differs from AT&T tput in two
+ This implementation of tput differs from AT&T tput in two
important areas:
- o tput writes to the standard output. That need not be
- a regular terminal.
-
- The AT&T implementation's init and reset commands use
- the tset source, which manipulates terminal modes. It
- successively tries standard output, standard error,
- standard input before falling back to "/dev/tty" and
- finally just assumes a 1200Bd terminal. When updating
- terminal modes, it ignores errors.
+ o tput capname writes to the standard output. That need
+ not be a regular terminal. However, the subcommands
+ which manipulate terminal modes may not use the stan-
+ dard output.
+
+ The AT&T implementation's init and reset commands use
+ the BSD (4.1c) tset source, which manipulates terminal
+ modes. It successively tries standard output, stan-
+ dard error, standard input before falling back to
+ "/dev/tty" and finally just assumes a 1200Bd terminal.
+ When updating terminal modes, it ignores errors.
+
+ Until changes made after ncurses 6.0, tput did not
+ modify terminal modes. tput now uses a similar
+ scheme, using functions shared with tset (and ulti-
+ mately based on the 4.4BSD tset). If it is not able
+ to open a terminal, e.g., when running in cron, tput
+ will return an error.
o AT&T tput guesses the type of its capname operands by
seeing if all of the characters are numeric, or not.
@@ -420,7 +438,7 @@
clear(1), stty(1), tabs(1), tset(1), terminfo(5),
curs_termcap(3x).
- This describes ncurses version 6.0 (patch 20160730).
+ This describes ncurses version 6.0 (patch 20160820).