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4 commits

Author SHA1 Message Date
Sergey Bugaev
52b0bd06a8 SystemServer: Implement lazy spawning 
For services explicitly configured as lazy, SystemServer will now listen
on the socket and only spawn the service once a client attempts to connect
to the socket.
 2019-11-26 19:58:25 +01:00
Sergey Bugaev
c9e21b2bcc SystemServer+LibCore: Implement socket takeover 
SystemServer can now create sockets on behalf of services before spawning any
of them, and pass the open socket fd as fd 3. CLocalServer gains a method to
complete the takeover and listen on the passed fd.

This is not used by any services at the moment.
 2019-11-26 19:58:25 +01:00
Sergey Bugaev
396ad4d6b2 SystemServer: Implement keepalive 
When reaping a child, SystemServer will now match up child's pid with its own
record of the services, and respawn the service if keepalive is enabled for it.

For example, we want to restart the WindowServer if it crashes, but we wouldn't
want to restart the Terminal if it gets closed.
 2019-11-26 19:58:25 +01:00
Sergey Bugaev
b93065359e SystemServer: Read service list from a config file 
This replaces the hardcoded services list with a very simple config
file in /etc/SystemServer.ini :^)

Closes https://github.com/SerenityOS/serenity/issues/610
 2019-11-26 19:58:25 +01:00