- Resident set size
The message is only displayed when the tty has the VSTATUS character
set, the local flags ICANON and IEXTEN are enabled and NOKERNINFO is
disabled; it is always displayed when TIOCSTAT is called regardless of
tty settings.
Signed-off-by: Walt Drummond
---
drivers/tty/Makef
Add definitions for the VSTATUS control character, and the NOKERNINFO
local control flag in the termios struct, and add an ioctl number for
the ioctl TIOCSTAT. Also add a default VSTATUS character (Ctrl-T)
default valuses in termios.c_cc. Do this for all architectures.
Signed-off-by: Walt
Refactor the implementation of n_tty_write() into do_n_tty_write(),
and change n_tty_write() to call do_n_tty_write() after acquiring
tty.termios_rwsem.
This allows the n_tty line dicipline to write to a user tty via
do_n_tty_write() when already holding tty.termios_rwsem.
Signed-off-by: Walt
ags
- The addition of the TIOCSTAT ioctl number
None of these changes break the existing kernel api as the termios
structure on all architectures has enough space in the control
character array (.c_cc) for the new character.
Walt Drummond (3):
vstatus: Allow the n_tty line dicipline to write to
ACK, will do.
On Wed, Jan 26, 2022 at 5:45 AM Greg KH wrote:
>
> On Mon, Jan 17, 2022 at 08:42:57PM -0800, Walt Drummond wrote:
> > This patchset adds TTY status message request feature to the n_tty
> > line dicipline. This feature prints a brief message containing basic
>
ray (.c_cc) for the new character, and the other changes
are space agnostic.
This feature is in many other Unix-like systems, both current and
historical. In other implementations, this feature would also send
SIGINFO to the process group; this implementation does not.
Walt Drummond (3):
vsta
Add definitions for the VSTATUS control character, and the NOKERNINFO
local control flag in the termios struct, and add an ioctl number for
the ioctl TIOCSTAT. Also add a default VSTATUS character (Ctrl-T)
default valuses in termios.c_cc. Do this for all architectures.
Signed-off-by: Walt
