sd_bus_enqueue_for_read - Re-enqueue a bus message on a bus connection, for
sd_bus_enqueue_for_read() may be used to re-enqueue an incoming bus
message on the local read queue, so that it is processed and dispatched
locally again, similar to how an incoming message from the peer is processed.
Takes a bus connection object and the message to enqueue. A reference is taken
of the message and the caller's reference thus remains in possession of the
caller. The message is enqueued at the end of the queue, thus will be
dispatched after all other already queued messages are dispatched.
This call is primarily useful for dealing with incoming method
calls that may be processed only after an additional asynchronous operation
completes. One example are PolicyKit authorization requests that are
determined to be necessary to authorize a newly incoming method call: when
the PolicyKit response is received the original method call may be
re-enqueued to process it again, this time with the authorization result
On success, this function return 0 or a positive integer. On failure, it returns
a negative errno-style error code.
Returned errors may indicate the following problems:
The bus connection has been created in a different
These APIs are implemented as a shared library, which can be compiled and linked
to with the libsystemd pkg-config(1) file.