There has been a great deal of useful discussion about how OpenSSL should seed its random number generator (CSPRNG).
There’s now a pull request that is mostly complete. Please take a look at
https://github.com/openssl/openssl/pull/3956 and feel free to comment.
In particular, https://github.com/richsalz/openssl/blob/rand-seed/crypto/rand/rand_unix.c has all supported seeding options for linux/unix systems;
you can send feedback to me directly or post to the list.
Senior Architect, Akamai Technologies
Member, OpenSSL Dev Team
IM: [hidden email] Twitter: RichSalz