X-Git-Url: http://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=doc%2Fhtml%2Fman%2Fclear.1.html;h=2f499b75b6056f009ed2051cbadb853ba94c0552;hp=edc85d7e5a7e8e8e99d531c22b393c73368c2722;hb=b5be26931d6488adcb1ff8bc07df9de378ce0d27;hpb=8e397cccba0aad135cb9a8a353756f4273a7cdf6
diff --git a/doc/html/man/clear.1.html b/doc/html/man/clear.1.html
index edc85d7e..2f499b75 100644
--- a/doc/html/man/clear.1.html
+++ b/doc/html/man/clear.1.html
@@ -1,6 +1,6 @@
@@ -42,7 +42,7 @@
-clear(1) clear(1)
+clear(1) clear(1)
@@ -52,57 +52,62 @@
- clear
+ clear [-Ttype] [-V] [-x]
- clear clears your screen if this is possible, including
- its scrollback buffer (if the extended "E3" capability is
- defined). clear looks in the environment for the terminal
- type given by the environment variable TERM, and then in
- the terminfo database to determine how to clear the
+ clear clears your screen if this is possible, including its scrollback
+ buffer (if the extended "E3" capability is defined). clear looks in
+ the environment for the terminal type given by the environment variable
+ TERM, and then in the terminfo database to determine how to clear the
screen.
- clear writes to the standard output. You can redirect the
- standard output to a file (which prevents clear from actu-
- ally clearing the screen), and later cat the file to the
- screen, clearing it at that point.
+ clear writes to the standard output. You can redirect the standard
+ output to a file (which prevents clear from actually clearing the
+ screen), and later cat the file to the screen, clearing it at that
+ point.
- clear ignores any command-line parameters that may be
- present. The analogous "tput clear" has command-line
- parameters including -T for overriding the TERM environ-
- ment variable.
+
+
+ -T type
+ 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.
+
+ -V reports the version of ncurses which was used in this program, and
+ exits. The options are as follows:
+
+ -x do not attempt to clear the terminal's scrollback buffer using the
+ extended "E3" capability.
- A clear command appeared in 2.79BSD dated February 24,
- 1979. Later that was provided in Unix 8th edition (1985).
+ A clear command appeared in 2.79BSD dated February 24, 1979. Later
+ that was provided in Unix 8th edition (1985).
- AT&T adapted a different BSD program (tset) to make a new
- command (tput), and used this to replace the clear command
- with a shell script which calls tput clear, e.g.,
+ AT&T adapted a different BSD program (tset) to make a new command
+ (tput), and used this to replace the clear command with a shell script
+ which calls tput clear, e.g.,
/usr/bin/tput ${1:+-T$1} clear 2> /dev/null
exit
- 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:
+ 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:
exec tput clear
- The remainder of the script in each case is a copyright
- notice.
+ The remainder of the script in each case is a copyright notice.
- The ncurses clear command began in 1995 by adapting the
- original BSD clear command (with terminfo, of course).
+ 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 stan-
- dard control sequence for clearing the screen. Rather
- than clearing just the visible part of the screen
- using
+ 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'
@@ -110,54 +115,51 @@
printf '\033[3J'
- This is documented in XTerm Control Sequences as a
- feature originating with xterm.
+ This is documented in XTerm Control Sequences as a feature origi-
+ nating with xterm.
- o A few other terminal developers adopted the feature,
- e.g., PuTTY in 2006.
+ 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, although it was cited
- in the Red Hat bug report (#683733) which led to the
- change.
+ 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 the next relevant step was a change to
- the clear program in 2013 to incorporate this exten-
- sion.
+ 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 share its logic with clear and
- tset.
+ 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.
- Neither IEEE Std 1003.1/The Open Group Base Specifica-
- tions Issue 7 (POSIX.1-2008) nor X/Open Curses Issue 7
- documents tset or reset.
+ 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 run tput as clear.
+ 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.
tput(1), terminfo(5)
- This describes ncurses version 6.0 (patch 20170429).
+ This describes ncurses version 6.0 (patch 20171028).
- clear(1)
+ clear(1)