-Ttype
- indicates the type of terminal. Normally this option is unneces-
- sary, because the default is taken from the environment variable
- TERM. If -T is specified, then the shell variables LINES and COL-
- UMNS will also be ignored.
+ indicates the type of terminal. Normally this option is
+ unnecessary, because the default is taken from the environment
+ variable TERM. If -T is specified, then the shell variables LINES
+ and COLUMNS will also be ignored.
-V reports the version of ncurses which was used in this program, and
exits. The options are as follows:
@@ -93,20 +94,21 @@
/usr/bin/tput ${1:+-T$1} clear 2> /dev/null
exit
- In 1989, when Keith Bostic revised the BSD tput command to make it sim-
- ilar to the AT&T tput, he added a shell script for the clear command:
+ In 1989, when Keith Bostic revised the BSD tput command to make it
+ similar to the AT&T tput, he added a shell script for the clear
+ command:
exec tput clear
The remainder of the script in each case is a copyright notice.
- The ncurses clear command began in 1995 by adapting the original BSD
+ The ncurses clear command began in 1995 by adapting the original BSD
clear command (with terminfo, of course).
The E3 extension came later:
- o In June 1999, xterm provided an extension to the standard control
- sequence for clearing the screen. Rather than clearing just the
+ o In June 1999, xterm provided an extension to the standard control
+ sequence for clearing the screen. Rather than clearing just the
visible part of the screen using
printf '\033[2J'
@@ -115,24 +117,24 @@
printf '\033[3J'
- This is documented in XTermControlSequences as a feature origi-
- nating with xterm.
+ This is documented in XTermControlSequences as a feature
+ originating with xterm.
o A few other terminal developers adopted the feature, e.g., PuTTY in
2006.
- o In April 2011, a Red Hat developer submitted a patch to the Linux
- kernel, modifying its console driver to do the same thing. The
- Linux change, part of the 3.0 release, did not mention xterm,
+ o In April 2011, a Red Hat developer submitted a patch to the Linux
+ kernel, modifying its console driver to do the same thing. The
+ Linux change, part of the 3.0 release, did not mention xterm,
although it was cited in the Red Hat bug report (#683733) which led
to the change.
- o Again, a few other terminal developers adopted the feature. But
+ o Again, a few other terminal developers adopted the feature. But
the next relevant step was a change to the clear program in 2013 to
incorporate this extension.
- o In 2013, the E3 extension was overlooked in tput with the "clear"
- parameter. That was addressed in 2016 by reorganizing tput to
+ o In 2013, the E3 extension was overlooked in tput with the "clear"
+ parameter. That was addressed in 2016 by reorganizing tput to
share its logic with clear and tset.
@@ -140,15 +142,15 @@
Neither IEEE Std 1003.1/The Open Group Base Specifications Issue 7
(POSIX.1-2008) nor X/Open Curses Issue 7 documents tset or reset.
- The latter documents tput, which could be used to replace this utility
- either via a shell script or by an alias (such as a symbolic link) to
+ The latter documents tput, which could be used to replace this utility
+ either via a shell script or by an alias (such as a symbolic link) to
run tput as clear.