[Buildroot] [PATCH] initscripts: Make installation of S20urandom optional.

[Thomas Petazzoni]

Hello Christoph,

On Sun, 19 Jul 2020 00:44:44 +0200
christoph.muellner at theobroma-systems.com wrote:

> From: Christoph Müllner <christoph.muellner at theobroma-systems.com>
> 
> S20urandom is a nice script. However, there are systems, which
> cannot make use of that script for some reasons (e.g. systems that
> only have read-only partitions).
> 
> So let's install S20urandom only if configured to do so
> (with default y to keep backwards-compatibility).
> 
> Signed-off-by: Christoph Müllner <christoph.muellner at theobroma-systems.com>

Hm, indeed it saves to /var/lib/random-seed, which we do not seem to
symlink to a tmpfs place when the rootfs is read-only. I'm not entirely
sure we want to add yet another option for this, or if we want to fix
it so that it "works" even in read-only rootfs scenarios. I don't have
a very clear opinion on how to handle that.

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com