original_kernel/drivers/tty/vt
Adam Borowski 63f3a16db9 vt: detect and ignore OSC codes.
These can be used to send commands consisting of an arbitrary string to the
terminal, most often used to set a terminal's window title or to redefine
the colour palette.  Our console doesn't use OSC, unlike everything else,
which can lead to junk being displayed if a process sends such a code
unconditionally.

The rules for termination follow established practice rather than Ecma-48.
Ecma-48 requires the string to use only byte values 0x08..0x0D and
0x20..0x7E, terminated with either ESC \ or 0x9C.  This would disallow using
8-bit characters, which are reasonable for example in window titles.
A widespread idiom is to terminate with 0x07.  The behaviour for other
control characters differs between terminal emulators, I followed libvte and
xterm:
* 0x07 and ESC anything terminate
* nothing else terminates, all 8-bit values including 0x9C are considered a
  part of the string

Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-28 16:25:47 -08:00
..
.gitignore
Makefile
consolemap.c
cp437.uni
defkeymap.c_shipped
defkeymap.map
keyboard.c
selection.c
vc_screen.c
vt.c vt: detect and ignore OSC codes. 2014-02-28 16:25:47 -08:00
vt_ioctl.c