1c81c3cfed
- drop Patch6 (texinfo): it's no longer needed as contributor list uses @verbatim now - drop unused screen-altscreen.patch - added descriptions to patches Resolves: #1757638
59 lines
1.5 KiB
Diff
59 lines
1.5 KiB
Diff
Clear scrollback buffer when locking terminal
|
|
|
|
Linux kernel 3.0 adds a new command to clear the scrollback buffer in
|
|
the linux console. It's available in the ncurses terminfo entry as
|
|
extended capability E3. This is useful to prevent an attacker to read
|
|
content of a locked terminal via Shift-PgUp key.
|
|
|
|
diff --git a/display.c b/display.c
|
|
index a4d953a..9ce34dd 100644
|
|
--- a/display.c
|
|
+++ b/display.c
|
|
@@ -4079,4 +4079,10 @@ char **cmdv;
|
|
|
|
#endif /* BLANKER_PRG */
|
|
|
|
+void
|
|
+ClearScrollbackBuffer()
|
|
+{
|
|
+ if (D_CE3)
|
|
+ AddCStr(D_CE3);
|
|
+}
|
|
|
|
diff --git a/extern.h b/extern.h
|
|
index bb7d3fb..a2678e3 100644
|
|
--- a/extern.h
|
|
+++ b/extern.h
|
|
@@ -319,6 +319,7 @@ extern int color256to88 __P((int));
|
|
extern void ResetIdle __P((void));
|
|
extern void KillBlanker __P((void));
|
|
extern void DisplaySleep1000 __P((int, int));
|
|
+extern void ClearScrollbackBuffer __P((void));
|
|
|
|
/* resize.c */
|
|
extern int ChangeWindowSize __P((struct win *, int, int, int));
|
|
diff --git a/screen.c b/screen.c
|
|
index c50952b..2fee7fa 100644
|
|
--- a/screen.c
|
|
+++ b/screen.c
|
|
@@ -1950,6 +1950,7 @@ void Detach(int mode)
|
|
|
|
case D_LOCK:
|
|
ClearAll();
|
|
+ ClearScrollbackBuffer();
|
|
sign = SIG_LOCK;
|
|
/* tell attacher to lock terminal with a lockprg. */
|
|
break;
|
|
diff --git a/term.c b/term.c
|
|
index c92d85a..a6e9200 100644
|
|
--- a/term.c
|
|
+++ b/term.c
|
|
@@ -83,6 +83,7 @@ struct term term[T_N] =
|
|
{ "CD", T_STR },
|
|
{ "ce", T_STR },
|
|
{ "cb", T_STR },
|
|
+ { "E3", T_STR },
|
|
|
|
/* initialise */
|
|
{ "is", T_STR },
|