UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
Martin Hostettler 2018-12-15 15:34:21 +01:00 committed by Greg Kroah-Hartman
parent 2ff5c5a1dc
commit 5445447b62
1 changed files with 18 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/tty/vt/vt.c
View File

@ -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) {