Hello,
I read the Bastei Design PDF and have a question regarding the information flow.
On page 5 it is stated: “When a parent calls the session function of the root
interface of a server child, the server creates a new client session and
returns the corresponding client_session capability. This session capability
provides the actual service-specific interface. The parent can use it directly
or it may pass it to other processes, in particular to another child that
requested the session.“
If i understand it correctly:
Service A is pronounces to “init”.
“Init” has the capability to Service A (e.g. AHCI).
Program B is started.
If Program B requests a service (e.g. read something fromAHCI), Init looks up
its root list and notifies A that the service is requested, A creates a new
capability and passes it to “Init”, which passes the capability further to B.
Is this correct? And does this happen always?
Can a capability then be revoked? E.g. Program B does something which is not
wanted and therefore the already given capability will be removed?
Best regards
Wolfgang
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