osi-mk.d/systemd-autologin-ttyS0.sh


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#!/hint/bash -euE
# Copyright (C) 2018  Luke Shumaker
# SPDX-License-Identifier: AGPL-3.0-or-later

post_install+=(10:autologin-ttyS0:post_install)
autologin-ttyS0:post_install() {
	local arg_mountpoint=$1

	mkdir "${arg_mountpoint}/etc/systemd/system/serial-getty@ttyS0.service.d"
	cat <<-EOT > "${arg_mountpoint}/etc/systemd/system/serial-getty@ttyS0.service.d/autologin.conf"
		[Service]
		ExecStart=
		$(sed -n '/^ExecStart=/s/ / --autologin root /p' < "${arg_mountpoint}/usr/lib/systemd/system/serial-getty@.service")
		EOT

	cat <<-'EOT' >> "$arg_mountpoint/etc/default/grub"
		GRUB_CMDLINE_LINUX_DEFAULT="console=ttyS0 console=tty0"
		GRUB_TERMINAL_OUTPUT="serial console"
		EOT
}