root autologin

linux/Makefile

@@ -1,6 +1,14 @@
 CHROOT_CMD := chroot build/rootfs /bin/bash -c
 ITDIR := build/rootfs/etc/initramfs-tools
 
+all: build/rootfs/initrd.img build/rootfs/lib/systemd/system/getty@.service build/rootfs/etc/systemd/logind.conf
+
+build/rootfs/lib/systemd/system/getty@.service: getty@.service
+	cp getty@.service build/rootfs/lib/systemd/system/getty@.service
+
+build/rootfs/etc/systemd/logind.conf: logind.conf
+	cp logind.conf build/rootfs/etc/systemd/logind.conf
+
 build/rootfs/initrd.img: build/rootfs initramfs/modules initramfs/download.sh
 	$(CHROOT_CMD) "apt update && apt install -y linux-image-4.19.0-6-amd64"
 	cp initramfs/download.sh $(ITDIR)/scripts/local-top

linux/getty@.service

@@ -0,0 +1,58 @@
+#  SPDX-License-Identifier: LGPL-2.1+
+#
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+
+[Unit]
+Description=Getty on %I
+Documentation=man:agetty(8) man:systemd-getty-generator(8)
+Documentation=http://0pointer.de/blog/projects/serial-console.html
+After=systemd-user-sessions.service plymouth-quit-wait.service getty-pre.target
+After=rc-local.service
+
+# If additional gettys are spawned during boot then we should make
+# sure that this is synchronized before getty.target, even though
+# getty.target didn't actually pull it in.
+Before=getty.target
+IgnoreOnIsolate=yes
+
+# IgnoreOnIsolate causes issues with sulogin, if someone isolates
+# rescue.target or starts rescue.service from multi-user.target or
+# graphical.target.
+Conflicts=rescue.service
+Before=rescue.service
+
+# On systems without virtual consoles, don't start any getty. Note
+# that serial gettys are covered by serial-getty@.service, not this
+# unit.
+ConditionPathExists=/dev/tty0
+
+[Service]
+# the VT is cleared by TTYVTDisallocate
+# The '-o' option value tells agetty to replace 'login' arguments with an
+# option to preserve environment (-p), followed by '--' for safety, and then
+# the entered username.
+ExecStart=-/sbin/agetty --autologin root --noclear %I 38400 linux
+Type=idle
+Restart=always
+RestartSec=0
+UtmpIdentifier=%I
+TTYPath=/dev/%I
+TTYReset=yes
+TTYVHangup=yes
+TTYVTDisallocate=yes
+KillMode=process
+IgnoreSIGPIPE=no
+SendSIGHUP=yes
+
+# Unset locale for the console getty since the console has problems
+# displaying some internationalized messages.
+UnsetEnvironment=LANG LANGUAGE LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT LC_IDENTIFICATION
+
+[Install]
+WantedBy=getty.target
+DefaultInstance=tty1

linux/logind.conf

@@ -0,0 +1,2 @@
+[Login]
+NAutoVTs=1