Petr, 2011/4/22 Petr Písař <ppisar@xxxxxxxxxx>: > Linux is going > (http://git.kernel.org/?p=linux/kernel/git/next/linux-next.git;a=commit;h=f8df13e0a901fe55631fed66562369b4dba40f8b) > to implement \E[3J to allow scrambling content of console including > scroll-back buffer (http://thread.gmane.org/gmane.linux.kernel/1125792). In which kernel version was this patch applied? Cheers, Michael > 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. Terminal reset (\Ec) or DECSRC are not suitable for > extension too beacuse they reset font, keyboard locks, unicode mode > etc. that are needed after unlocking session. > > \E[3J is superset of \E[2J. IOW it clears visible screen too. > > Signed-off-by: Petr Písař <ppisar@xxxxxxxxxx> > --- > man4/console_codes.4 | 2 ++ > 1 files changed, 2 insertions(+), 0 deletions(-) > > diff --git a/man4/console_codes.4 b/man4/console_codes.4 > index 2a806b7..62f2247 100644 > --- a/man4/console_codes.4 > +++ b/man4/console_codes.4 > @@ -188,6 +188,8 @@ 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. > 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. > -- > 1.7.4.4 > > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Author of "The Linux Programming Interface"; http://man7.org/tlpi/ -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
