1 commit 0aec2900f63820c3405ba38a4d1cd67cc22f0715
2 Author: Miroslav Lichvar <mlichvar@redhat.com>
3 Date: Mon Jul 18 17:26:47 2011 +0200
5 Clear scrollback buffer when locking terminal
7 Linux kernel 3.0 adds a new command to clear the scrollback buffer in
8 the linux console. It's available in the ncurses terminfo entry as
9 extended capability E3. This is useful to prevent an attacker to read
10 content of a locked terminal via Shift-PgUp key.
12 diff --git a/src/display.c b/src/display.c
13 index 5fa11cb..038c435 100644
16 @@ -3779,4 +3779,10 @@ char **cmdv;
18 #endif /* BLANKER_PRG */
21 +ClearScrollbackBuffer()
27 diff --git a/src/extern.h b/src/extern.h
28 index c787d99..d3fecf0 100644
31 @@ -316,6 +316,7 @@ extern int color256to88 __P((int));
32 extern void ResetIdle __P((void));
33 extern void KillBlanker __P((void));
34 extern void DisplaySleep1000 __P((int, int));
35 +extern void ClearScrollbackBuffer __P((void));
38 extern int ChangeWindowSize __P((struct win *, int, int, int));
39 diff --git a/src/screen.c b/src/screen.c
40 index cc8f565..3efb67b 100644
43 @@ -1967,6 +1967,7 @@ int mode;
47 + ClearScrollbackBuffer();
49 /* tell attacher to lock terminal with a lockprg. */
51 diff --git a/src/term.c b/src/term.c
52 index 991de1b..7485900 100644
55 @@ -83,6 +83,7 @@ struct term term[T_N] =