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| author | Petr Písař <ppisar@redhat.com> | 2011-04-15 10:08:08 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-04-19 16:33:37 -0700 |
| commit | f8df13e0a901fe55631fed66562369b4dba40f8b (patch) | |
| tree | 105031898b999a9da275a7aa32b5d67733d5b849 /drivers/net/ppp_async.c | |
| parent | d94206028854ba4c891004cecdbb2e220bf277bb (diff) | |
| download | lwn-f8df13e0a901fe55631fed66562369b4dba40f8b.tar.gz lwn-f8df13e0a901fe55631fed66562369b4dba40f8b.zip | |
tty: Clean console safely
Traditional \E[2J sequence erases console display but scroll-back
buffer and underlying device (frame) buffer keep data that can be
accessed by scrolling console back.
This patch introduce new \E[J parameter 3 that allows to scramble
scroll-back buffer explicitly. Session locking programs (screen,
vlock) can use it to prevent attacker to browse locked console
history.
Signed-off-by: Petr Písař <ppisar@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/net/ppp_async.c')
0 files changed, 0 insertions, 0 deletions