board/czechlight/common/patches/systemd/random-seed.patch

From afb5af76c137c71bfdb94d47bd5e33dba54147f7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20Kundr=C3=A1t?= <jan.kundrat@cesnet.cz>
Date: Wed, 4 Dec 2019 09:18:36 +0100
Subject: [PATCH] Entropy seed for CzechLight

Everything changed in sytemd v243 which gained a native service which is
nowadays capable of crediting the seed with sufficient entropy. However,
everything is still wrapped behind a random env variable (to guard
against people cloning images) and runs rather late in the boot. The
docs still suggest to run something custom "from the boot loader" on
embedded systems with no HW random generator (hi ClearFog).

So, given that we're using the pre-init shell script for seeding the
random generator from disk, we only need this one for systemd to *save*
the seed for the next boot.

See-also: https://gerrit.cesnet.cz/c/CzechLight/br2-external/+/1548
---
 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meson.build b/meson.build
index e5ceb1e169..ff3af58b8f 100644
--- a/meson.build
+++ b/meson.build
@@ -155,7 +155,7 @@ bootlibdir = join_paths(prefixdir, 'lib/systemd/boot/efi')
 testsdir = join_paths(prefixdir, 'lib/systemd/tests')
 systemdstatedir = join_paths(localstatedir, 'lib/systemd')
 catalogstatedir = join_paths(systemdstatedir, 'catalog')
-randomseeddir = join_paths(localstatedir, 'lib/systemd')
+randomseeddir = '/cfg/random-seed'
 profiledir = join_paths(rootlibexecdir, 'portable', 'profile')
 ntpservicelistdir = join_paths(rootprefixdir, 'lib/systemd/ntp-units.d')
 
-- 
2.21.0