sd_bus_enqueue_for_read(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | SEE ALSO | COLOPHON

SD_BUS_ENQUEUE_FOR_READ(3)d_bus_enqueue_for_read_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.

   Errors
       Returned errors may indicate the following problems:

       -ECHILD
           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

       This page is part of the systemd (systemd system and service
       manager) project.  Information about the project can be found at
       ⟨http://www.freedesktop.org/wiki/Software/systemd⟩.  If you have
       a bug report for this manual page, see
       ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
       This page was obtained from the project's upstream Git repository
       ⟨https://github.com/systemd/systemd.git⟩ on 2021-06-20.  (At that
       time, the date of the most recent commit that was found in the
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systemd 249                                   SD_BUS_ENQUEUE_FOR_READ(3)

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