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console_codes.4: Add ESC [ 3 J 

Linux 3.0 (commit f8df13e0a901fe55631fed66562369b4dba40f8b)
implements \E[3J to allow scrambling content of console
including scroll-back buffer
(http://thread.gmane.org/gmane.linux.kernel/1125792).

This is useful at terminal lock to disallow attacker to scroll
visible window back and to see sensitive data. Other \E[J sequences
do not blank history.

\E[3J is superset of \E[2J. In other words, it clears visible screen too.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Petr Pisar 2011-09-15 05:02:52 +02:00 committed by Michael Kerrisk
parent c751683c17
commit 31483837fc
1 changed files with 5 additions and 2 deletions
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7
man4/console_codes.4
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@ -18,7 +18,7 @@
.\"
.\" 2006-05-27, Several corrections - Thomas E. Dickey
.\"
.TH CONSOLE_CODES 4 2008-01-01 "Linux" "Linux Programmer's Manual"
.TH CONSOLE_CODES 4 2011-09-15 "Linux" "Linux Programmer's Manual"
.SH NAME
console_codes \- Linux console escape and control sequences
.SH DESCRIPTION
@ -175,7 +175,7 @@ and this entire sequence is ignored.
.PP
The action of a CSI sequence is determined by its final character.
.TS
l l l.
l l l l.
@ ICH Insert the indicated # of blank characters.
A CUU Move cursor up the indicated # of rows.
B CUD Move cursor down the indicated # of rows.
@ -188,6 +188,9 @@ H CUP Move cursor to the indicated row, column (origin at 1,1).
J ED Erase display (default: from cursor to end of display).
ESC [ 1 J: erase from start to cursor.
ESC [ 2 J: erase whole display.
ESC [ 3 J: erase whole display including scroll-back
buffer (since Linux 3.0).
.\" ESC [ 3 J: commit f8df13e0a901fe55631fed66562369b4dba40f8b
K EL Erase line (default: from cursor to end of line).
ESC [ 1 K: erase from start of line to cursor.
ESC [ 2 K: erase whole line.