sd_bus_enqueue_for_read(3) — Linux manual page


SD_BUS_ENQUEUE_FOR_READ(3) sd_bus_enqueue_for_readSD_BUS_ENQUEUE_FOR_READ(3)

NAME         top

       sd_bus_enqueue_for_read - Re-enqueue a bus message on a bus
       connection, for reading

SYNOPSIS         top

       #include <systemd/sd-bus.h>

       int sd_bus_enqueue_for_read(sd_bus *bus, sd_bus_message *message);

DESCRIPTION         top

       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 known.

RETURN VALUE         top

       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 process.

NOTES         top

       These APIs are implemented as a shared library, which can be compiled
       and linked to with the libsystemd pkg-config(1) file.

SEE ALSO         top

       systemd(1), sd-bus(3), sd_bus_send(3),

COLOPHON         top

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systemd 246                                       SD_BUS_ENQUEUE_FOR_READ(3)

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