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screen-rhel
_service:download_src_package:screen-E3.patch
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File _service:download_src_package:screen-E3.patch of Package screen-rhel
commit 0aec2900f63820c3405ba38a4d1cd67cc22f0715 Author: Miroslav Lichvar <mlichvar@redhat.com> Date: Mon Jul 18 17:26:47 2011 +0200 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/src/display.c b/src/display.c index 5fa11cb..038c435 100644 --- a/src/display.c +++ b/src/display.c @@ -3779,4 +3779,10 @@ char **cmdv; #endif /* BLANKER_PRG */ +void +ClearScrollbackBuffer() +{ + if (D_CE3) + AddCStr(D_CE3); +} diff --git a/src/extern.h b/src/extern.h index c787d99..d3fecf0 100644 --- a/src/extern.h +++ b/src/extern.h @@ -316,6 +316,7 @@ 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/src/screen.c b/src/screen.c index cc8f565..3efb67b 100644 --- a/src/screen.c +++ b/src/screen.c @@ -1967,6 +1967,7 @@ int mode; #endif case D_LOCK: ClearAll(); + ClearScrollbackBuffer(); sign = SIG_LOCK; /* tell attacher to lock terminal with a lockprg. */ break; diff --git a/src/term.c b/src/term.c index 991de1b..7485900 100644 --- a/src/term.c +++ b/src/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 },
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