runit-scripts/boot-services/05-hostname.sh

# shellcheck shell=sh

(
[ -r /etc/hostname ] && read -r HOSTNAME < /etc/hostname
[ "${HOSTNAME}" ] && {
	msg "setting hostname to '${HOSTNAME}'"
	printf '%s' "${HOSTNAME}" > /proc/sys/kernel/hostname \
		|| error 'failed to set hostname'
}
) &