diff options
| author | Martin Hostettler | 2018-12-15 15:34:21 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2019-01-18 13:56:41 +0100 |
| commit | 5445447b62e0cf69a6f8b62df51c1ef6f2cd56fe (patch) | |
| tree | d330670c4425d26a437498f89acca073d03534d6 | |
| parent | 2ff5c5a1dc6e6c502e0a3e49db4e792804e43693 (diff) | |
vt: Implement parsing for >, =, < private sequences.
Private sequences can start with '>', '=' and (in theory) '<'.
Implement correct parsing for these. The newly parsable sequences are
cleanly ignored as it is customary with terminal emulators.
This allows the vt to ignore various sequences used by more capable
terminal implementations such as "Secondary Device Attributes",
"Tertiary Device Attributes" and various advanced configuration commands
that don't have dedicated terminfo entries.
Signed-off-by: Martin Hostettler <textshell@uchuujin.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/vt/vt.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index b59feeaaf02b..ec61f8356245 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -2236,9 +2236,21 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) vc->vc_state=ESfunckey; return; } - vc->vc_priv = (c == '?') ? EPdec : EPecma; - if (vc->vc_priv != EPecma) + switch (c) { + case '?': + vc->vc_priv = EPdec; + return; + case '>': + vc->vc_priv = EPgt; + return; + case '=': + vc->vc_priv = EPeq; return; + case '<': + vc->vc_priv = EPlt; + return; + } + vc->vc_priv = EPecma; /* fall through */ case ESgetpars: if (c == ';' && vc->vc_npar < NPAR - 1) { @@ -2252,10 +2264,12 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) vc->vc_state = ESnormal; switch(c) { case 'h': - set_mode(vc, 1); + if (vc->vc_priv <= EPdec) + set_mode(vc, 1); return; case 'l': - set_mode(vc, 0); + if (vc->vc_priv <= EPdec) + set_mode(vc, 0); return; case 'c': if (vc->vc_priv == EPdec) { |