ncurses 6.0 - patch 20161231

[ncurses.git] / doc / html / man / clear.1.html

diff --git a/doc/html/man/clear.1.html b/doc/html/man/clear.1.html
index 1af927041d0cf6febb20816fd7f4a1f039e25414..74b53fdc670bac6f876f7373d5664c4584df21ac 100644 (file)
--- a/doc/html/man/clear.1.html
+++ b/doc/html/man/clear.1.html
@@ -26,7 +26,7 @@
   * sale, use or other dealings in this Software without prior written       *
   * authorization.                                                           *
   ****************************************************************************
-  * @Id: clear.1,v 1.14 2016/11/19 21:30:46 tom Exp @
+  * @Id: clear.1,v 1.16 2016/12/31 16:09:34 tom Exp @
   * these would be fallbacks for DS/DE,
   * but groff changed the meaning of the macros.
 -->
@@ -59,11 +59,19 @@
        <STRONG>clear</STRONG>  clears  your  screen if this is possible, including
        its scrollback buffer (if the extended "E3" capability  is
        defined).  <STRONG>clear</STRONG> looks in the environment for the terminal
-       type and then in the <STRONG>terminfo</STRONG> database to determine how to
-       clear the screen.
+       type given by the environment variable <STRONG>TERM</STRONG>, and  then  in
+       the  <STRONG>terminfo</STRONG>  database  to  determine  how  to  clear the
+       screen.
+
+       <STRONG>clear</STRONG> writes to the standard output.  You can redirect the
+       standard output to a file (which prevents <STRONG>clear</STRONG> from actu-
+       ally clearing the screen), and later <STRONG>cat</STRONG> the file  to  the
+       screen, clearing it at that point.
 
        <STRONG>clear</STRONG>  ignores  any  command-line  parameters  that may be
-       present.
+       present.  The  analogous  "<STRONG>tput</STRONG>  clear"  has  command-line
+       parameters  including  <STRONG>-T</STRONG> for overriding the <STRONG>TERM</STRONG> environ-
+       ment variable.
 
 
 </PRE><H2><a name="h2-HISTORY">HISTORY</a></H2><PRE>
@@ -73,13 +81,15 @@
        AT&amp;T  adapted a different BSD program (<STRONG>tset</STRONG>) to make a new
        command (<STRONG>tput</STRONG>), and used this to replace the <STRONG>clear</STRONG> command
        with a shell script which calls <STRONG>tput</STRONG> <STRONG>clear</STRONG>, e.g.,
-           /usr/bin/tput ${1:+-T$1} clear 2&gt; /dev/null
-           exit
+
+         /usr/bin/tput ${1:+-T$1} clear 2&gt; /dev/null
+         exit
 
        In 1989, when Keith Bostic revised the BSD <STRONG>tput</STRONG> command to
        make it similar to the AT&amp;T <STRONG>tput</STRONG>, he added a shell  script
        for the <STRONG>clear</STRONG> command:
-           exec tput clear
+
+         exec tput clear
 
        The  remainder  of  the script in each case is a copyright
        notice.
@@ -93,10 +103,12 @@
            dard 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 <EM>scrollback</EM> using
-               printf '\033[<STRONG>3</STRONG>J'
+
+             printf '\033[<STRONG>3</STRONG>J'
 
            This is documented in <EM>XTerm</EM>  <EM>Control</EM>  <EM>Sequences</EM>  as  a
            feature originating with xterm.
@@ -135,7 +147,7 @@
 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
        <STRONG><A HREF="tput.1.html">tput(1)</A></STRONG>, <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>
 
-       This describes <STRONG>ncurses</STRONG> version 6.0 (patch 20161119).
+       This describes <STRONG>ncurses</STRONG> version 6.0 (patch 20161231).