RFC regarding rng-tools startup.

stage2/01-sys-tweaks/01-run.sh

@@ -27,6 +27,7 @@ on_chroot << EOF
 systemctl disable hwclock.sh
 systemctl disable nfs-common
 systemctl disable rpcbind
+systemctl disable rng-tools
 if [ "${ENABLE_SSH}" == "1" ]; then
 	systemctl enable ssh
 else

stage2/04-rng-tools/00-patches/01-rng-tools.diff

@@ -0,0 +1,11 @@
+--- stage2.orig/rootfs/etc/init.d/rng-tools	2020-09-20 17:48:03.967820377 +0100
++++ stage2/rootfs/etc/init.d/rng-tools	2020-09-21 04:30:07.379806813 +0100
+@@ -19,7 +19,7 @@
+ DAEMON=/usr/sbin/rngd
+ NAME=rngd
+ DESC="Hardware RNG entropy gatherer daemon"
+-PIDFILE=/var/run/rngd.pid
++PIDFILE=/run/rngd.pid
+
+ DEVICELIST="hwrng hw_random hwrandom intel_rng i810_rng"
+

stage2/04-rng-tools/00-patches/series

@@ -0,0 +1 @@
+01-rng-tools.diff

stage2/04-rng-tools/01-run.sh

@@ -0,0 +1,7 @@
+#!/bin/bash -e
+
+install -m 644 files/rng-tools.service	"${ROOTFS_DIR}/etc/systemd/system/"
+
+on_chroot << EOF
+systemctl -f enable rng-tools
+EOF

stage2/04-rng-tools/files/rng-tools.service

@@ -0,0 +1,22 @@
+#  SPDX-License-Identifier: LGPL-2.1+
+#
+#  This file is provided by pi-gen.
+#
+
+[Unit]
+Description=Start rng-tools
+DefaultDependencies=no
+Conflicts=shutdown.target
+Before=fake-hwclock.service systemd-journald.service
+Before=sysinit.target shutdown.target
+ConditionVirtualization=!container
+
+[Service]
+EnvironmentFile=-/etc/default/rng-tools
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/etc/init.d/rng-tools start
+ExecStop=/etc/init.d/rng-tools stop
+
+[Install]
+WantedBy=systemd-random-seed.service