#!/usr/bin/env -S porch -f
--
-- Copyright (c) 2024 Kyle Evans <kevans@FreeBSD.org>
--
-- SPDX-License-Identifier: BSD-2-Clause
--

timeout(3)

local function spawn_one(...)
	spawn(...)

	stty("lflag", 0, tty.lflag.ICANON)
end

-- We can send one byte...
spawn_one("readsz", "-c", 1)
write "H"
match "^H$"

-- or many.
spawn_one("readsz", "-c", 1)
write "Hello"
match "^Hello$"

-- VEOF is a normal character here, passed through as-is.
spawn_one("readsz", "-c", 1)
write "Hello^D"
match "^Hello\x04$"
spawn_one("readsz", "-c", 1)
write "^D"
match "^\x04$"

-- Confirm that FIONREAD agrees that VEOF will be returned, even if it was sent
-- while the tty was still in canonical mode.
spawn("fionread")
write "^D"
stty("lflag", 0, tty.lflag.ICANON)
match "^1$"