X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=doc%2Fhtml%2Fman%2Fclear.1.html;h=8a32a74ff86fe116a68929692fcf845676739a4f;hp=2a21936a69af82d76927112ec293071a20506b26;hb=9f479192e3ca3413d235c66bf058f8cc63764898;hpb=0485620c03e69b1b58a6b12e5e45c98415fc7575 diff --git a/doc/html/man/clear.1.html b/doc/html/man/clear.1.html index 2a21936a..8a32a74f 100644 --- a/doc/html/man/clear.1.html +++ b/doc/html/man/clear.1.html @@ -1,6 +1,7 @@ - @@ -34,124 +35,126 @@ - -clear 1 - + +@CLEAR@ 1 + -

clear 1

@CLEAR@ 1

-clear(1)                                                              clear(1)
+clear(1)                    General Commands Manual                   clear(1)

NAME

-       clear - clear the terminal screen
+       clear - clear the terminal screen

SYNOPSIS

-       clear [-Ttype] [-V] [-x]
+       clear [-Ttype] [-V] [-x]

DESCRIPTION

-       clear  clears your screen if this is possible, including its scrollback
-       buffer (if the extended "E3" capability is defined).   clear  looks  in
+       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
+       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  actually  clearing  the
-       screen),  and  later  cat  the  file to the screen, clearing it at that
+       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.

OPTIONS

-       -T type
-            indicates the type of terminal.  Normally this option is  unneces-
-            sary,  because  the default is taken from the environment variable
-            TERM.
+       -T type
+            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
+       -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
+       -x   do not attempt to clear the terminal's scrollback buffer using the
             extended "E3" capability.

HISTORY

-       A clear command appeared in 2.79BSD dated  February  24,  1979.   Later
+       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
+           /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
+           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
-       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:
+       The E3 extension came later:
 
-       o   In  June  1999, xterm provided an extension to the standard control
+       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'
+               printf '\033[2J'
 
-           one could clear the scrollback using
+           one could clear the scrollback using
 
-             printf '\033[3J'
+               printf '\033[3J'
 
-           This  is  documented in XTerm Control Sequences as a feature origi-
-           nating with xterm.
+           This  is  documented  in  XTerm  Control  Sequences  as  a  feature
+           originating with xterm.
 
-       o   A few other terminal developers adopted the feature, e.g., PuTTY in
+       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
+       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
+       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.

PORTABILITY

        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
+       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.
+       run tput as clear.