[Opendnssec-develop] PIN daemon

[Rickard Bellgrim]

Hi

We have been talking about a PIN daemon for some time now, and I was
thinking if shared memory would be sufficient?

E.g.
1. The process creates/opens a named semaphore.
2. Lock the semaphore.
3. Create the shared memory if it does not exist.
4. If PIN exist, unlock and return PIN.
5. If PIN does not exist, get PIN from config or PIN callback.
6. Save PIN, unlock, return PIN.

// Rickard