NewInit instantiates a Pico Init/Service Manager combo, performs the necessary initialization for the init responsibilities, launches the pre-hook (if one was specified) and launches the specified list of services.

Hook represents the command/script that will be invoked by Init prior to launching the services.

InitConfig is the configuration used by Init.

Service represents the service that will be managed by Init.

Init manages init responsibility in a system (by reaping processes which get parented to pid 1), and allows launching/managing services (including forwarding signals to them from the process where Init is running).