Module

`sysl.tty.sys`

Mode

Import import sysl.tty.sys

Index

struct Mode
    echo: bool
    canonical: bool
    signals: bool
    output: bool
    crlf: bool
    min: u8
    time: u8

The settings of a terminal a program changes, each named for what it does rather than for the POSIX flag that does it.

echo – typed characters are shown as they arrive (ECHO).
canonical – input is released a whole line at a time, with the line editing the terminal does itself (ICANON); off, every byte is released as it arrives.
signals – Ctrl-C and its kin become signals rather than bytes (ISIG).
output – what is written is processed on its way out at all (OPOST).
crlf – a \n written goes out as \r\n (ONLCR), which only means something with output.
min and time – with canonical off, how many bytes a read waits for and how many tenths of a second it waits (VMIN, VTIME).