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#!/usr/libexec/flua
---
-- SPDX-License-Identifier: BSD-2-Clause
--
-- Copyright (c) 2026 Baptiste Daroussin <bapt@FreeBSD.org>
local n = require("nuage")
local root = os.getenv("NUAGE_FAKE_ROOTDIR")
if not root then
root = ""
end
local hostnamepath = root .. "/etc/rc.conf.d/hostname"
local function check_hostname(expected)
local f = io.open(hostnamepath, "r")
if not f then
n.err("hostname file not found, expected: " .. expected)
end
local content = f:read("*a")
f:close()
local expected_content = 'hostname="' .. expected:gsub('"', '\\"') .. '"\n'
if content ~= expected_content then
n.err("hostname mismatch: got '" .. content ..
"', expected '" .. expected_content .. "'")
end
end
local function check_no_hostname()
if io.open(hostnamepath, "r") then
n.err("hostname file should not exist")
end
end
-- nil hostname: no-op
n.sethostname(nil)
check_no_hostname()
-- Empty hostname: invalid
n.sethostname("")
check_no_hostname()
-- Hostname too long (>253 chars): invalid
n.sethostname(string.rep("a", 254))
check_no_hostname()
-- Invalid characters: invalid
n.sethostname("host;name")
check_no_hostname()
-- Starts with dot: invalid
n.sethostname(".hostname")
check_no_hostname()
-- Ends with hyphen: invalid
n.sethostname("hostname-")
check_no_hostname()
-- Label too long (>63 chars): invalid
n.sethostname(string.rep("a", 64) .. ".example.com")
check_no_hostname()
-- Label starts with hyphen: invalid
n.sethostname("myhost.-label.com")
check_no_hostname()
-- Valid simple hostname
n.sethostname("myhostname")
check_hostname("myhostname")
-- Final: set a valid hostname for the shell test
n.sethostname("myhostname")
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