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because the destination is unavailable
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The signals appear entirely redundant due to NameOwnerChange, hence
don't do them in the new library, instead leave them for the
compatibility bridge only.
Also, set the serial number for synthesized messages to (uint32_t) -1.
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We need this so that one incoming kernel message can result in two
high-level bus messages, for the case where we synthesize NameAcquired
and NameOwnerChanged in the same instance.
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Factor out code from sd_bus_negotiate_attach_creds() to a generic
translate function, so it can be used from other places.
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matches against NameOwnerChange
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kdbus_cmd_hello now has a new uint64_t flags field for the requested
attachments. Follow that change in libsystemd-bus.
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This way we can unify handling of credentials that are attached to
messages, or can be queried for bus name owners or connection peers.
This also adds the ability to extend incomplete credential information
with data from /proc,
Also, provide a convenience call that will automatically determine the
most appropriate credential object for an incoming message, by using the
the attached information if possible, the sending name information if
available and otherwise the peer's credentials.
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can be freed
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Message handler callbacks can be simplified drastically if the
dispatcher automatically replies to method calls if errors are returned.
Thus: add an sd_bus_error argument to all message handlers. When we
dispatch a message handler and it returns negative or a set sd_bus_error
we send this as message error back to the client. This means errors
returned by handlers by default are given back to clients instead of
rippling all the way up to the event loop, which is desirable to make
things robust.
As a side-effect we can now easily turn the SELinux checks into normal
function calls, since the method call dispatcher will generate the right
error replies automatically now.
Also, make sure we always pass the error structure to all property and
method handlers as last argument to follow the usual style of passing
variables for return values as last argument.
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works for const strings
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event source to be triggered again
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This patch converts PID 1 to libsystemd-bus and thus drops the
dependency on libdbus. The only remaining code using libdbus is a test
case that validates our bus marshalling against libdbus' marshalling,
and this dependency can be turned off.
This patch also adds a couple of things to libsystem-bus, that are
necessary to make the port work:
- Synthesizing of "Disconnected" messages when bus connections are
severed.
- Support for attaching multiple vtables for the same interface on the
same path.
This patch also fixes the SetDefaultTarget() and GetDefaultTarget() bus
calls which used an inappropriate signature.
As a side effect we will now generate PropertiesChanged messages which
carry property contents, rather than just invalidation information.
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Fix a couple of 'void' that should have been 'sd_bus'.
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everywhere
We want to emphasize bus connections as per-thread communication
primitives, hence introduce a concept of a per-thread default bus, and
make use of it everywhere.
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The call is one of the most important ones we expose, where we place
major emphasis on. We should make sure to give it a short, memorable
name.
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Old static libsystemd-bus.la becomes libsystemd-bus-internal.la.
memfd functions are also exported in the same library.
(Best viewed with --color-words -U0).
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currently being dispatched
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Also, add support for this to machinectl, so that we can enumerate the
machines that run inside a container. We must go deeper!
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This way, we do not have to call it manually
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Among other things this also adds a few things necessary for the change:
- Considerably more powerful error returning APIs in libsystemd-bus
- Adapter for connecting an sd_bus to an sd_event
- As I reworked the PolicyKit logic to the new library I also made it
asynchronous, so that PolicyKit requests of one user cannot block out
another user anymore.
- We always use the macro names for common bus error. That way it is
harder to mistype them since the compiler will notice
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This way they are nicer to use from method dispatch callbacks as last
call, since method dispatch callbacks expect > 0 return if the message
got handled.
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read but not dispatched messages
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Otherwise the callback might unref the bus we are processing and destroy
the object while we are processing it.
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each invocation
We can determine the list entry type via the typeof() gcc construct, and
so we should to make the macros much shorter to use.
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right thing automatically
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method in a vtable
Also, allow specifiying NULL as signature in vtables equivalent to ""
for empty parameter lists.
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serialization on Get()
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with no payload
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