Module terminal 

Terminal state tracking for /dev/console and /dev/tty*

Provides POSIX-compatible terminal attributes (struct termios equivalent) and window size tracking. The terminal state is queried and modified via SYS_IOCTL (syscall 112) with TCGETS/TCSETS/TIOCGWINSZ requests.

The state is used by the console read path to implement canonical vs raw mode, echo control, and control character handling.

Structs

KernelTermios

Linux struct termios layout (60 bytes).

KernelWinsize

Terminal window size, matching the C struct winsize layout.

TerminalState

Combined terminal state for a single console device.

Constants

CREAD

CS8

ECHO

ECHOE

ECHOK

HUPCL

ICANON

ICRNL

IEXTEN

ISIG

IXON

NCCS

Number of control characters.

ONLCR

OPOST

TCGETS

Get terminal attributes (struct termios).

TCSETS

Set terminal attributes immediately.

TCSETSF

Set terminal attributes after draining output and flushing input.

TCSETSW

Set terminal attributes after draining output.

TIOCGPGRP

Get foreground process group ID.

TIOCGWINSZ

Get terminal window size (struct winsize).

TIOCSPGRP

Set foreground process group ID.

TIOCSWINSZ

Set terminal window size.

VEOF

VERASE

VINTR

VKILL

VMIN

VQUIT

VSTART

VSTOP

VSUSP

VTIME

Functions

get_console_terminal

Get the global console terminal state.

get_termios_snapshot

Get a snapshot of the current termios (for the ioctl handler).

get_verase

Get the erase character from the console terminal state.

get_vmin

Get the VMIN value from the console terminal state.

get_vtime

Get the VTIME value from the console terminal state.

get_winsize_snapshot

Get a snapshot of the current winsize (for the ioctl handler).

init

Initialize the global console terminal state.

is_canonical_mode

Check if the console is in canonical (line-buffered) mode.

is_echo_enabled

Check if echo is enabled on the console.

set_termios

Set the terminal attributes (from TCSETS/TCSETSW/TCSETSF ioctl).

set_winsize

Set the window size (from TIOCSWINSZ ioctl).