On Fri, 5 Jul 2019 at 08:07, Ralph Corderoy <ra...@inputplus.co.uk> wrote:

> Here's me entering Ctrl-1, Ctrl-2, ... up to Ctrl-0 and then Enter.
>
>     $ stty raw; \
>     > ((timeout --foreground 4.2 dd bs=1; stty cooked; echo >&3) | hd) 3>&1
>     1^@^[^\^]^^^_^?9^M
>     00000000  31 00 1b 1c 1d 1e 1f 7f  39 0d
> |1.......9.|
>     0000000a
>     $
>
> You can see the TTY's ‘ctlecho’ setting causing Ctrl-2 to be echoed as
> ‘^@’, NUL, and that's confirmed by the hex dump.  0x1c is backslash,
> 0x5c, with Ctrl masking off 0x40.
>

I had no idea about those. It's a minefield!

Tim.
*/
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