sd_bus_slot_get_bus(3) — Linux manual page


SD_BUS_SLOT_GET_BUS(3)     sd_bus_slot_get_bus    SD_BUS_SLOT_GET_BUS(3)

NAME         top

       sd_bus_slot_get_bus, sd_bus_slot_get_current_handler,
       sd_bus_slot_get_current_message, sd_bus_slot_get_current_userdata
       - Query information attached to a bus slot object

SYNOPSIS         top

       #include <systemd/sd-bus.h>

       typedef int (*sd_bus_message_handler_t)(sd_bus_message *m,
                                               void *userdata,
                                               sd_bus_error *ret_error);

       sd_bus *sd_bus_slot_get_bus(sd_bus_slot *slot);

                                                                sd_bus_slot_get_current_handler(sd_bus_slot *slot);

                                                       *sd_bus_slot_get_current_message(sd_bus_slot *slot);

       void *sd_bus_slot_get_current_userdata(sd_bus_slot *slot);

DESCRIPTION         top

       sd_bus_slot_get_bus() returns the bus object that message slot is
       attached to.

       sd_bus_slot_get_current_message() and
       sd_bus_slot_get_current_userdata() return the current handler,
       message and userdata respectively of the bus slot is attached to
       if we're currently executing the callback associated with slot.

RETURN VALUE         top

       sd_bus_slot_get_bus() always returns the bus object.

       On success, sd_bus_slot_get_current_handler(),
       sd_bus_slot_get_current_message() and
       sd_bus_slot_get_current_userdata() return the requested object.
       On failure, they return NULL.

NOTES         top

       Functions described here are available as a shared library, which
       can be compiled against and linked to with the
       libsystemd pkg-config(1) file.

       The code described here uses getenv(3), which is declared to be
       not multi-thread-safe. This means that the code calling the
       functions described here must not call setenv(3) from a parallel
       thread. It is recommended to only do calls to setenv() from an
       early phase of the program when no other threads have been

HISTORY         top

       sd_bus_slot_get_bus(), sd_bus_slot_get_current_handler(),
       sd_bus_slot_get_current_message(), and
       sd_bus_slot_get_current_userdata() were added in version 246.

SEE ALSO         top

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

COLOPHON         top

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       manager) project.  Information about the project can be found at
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       This page was obtained from the project's upstream Git repository
       ⟨⟩ on 2023-12-22.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2023-12-22.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
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       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

systemd 255                                       SD_BUS_SLOT_GET_BUS(3)

Pages that refer to this page: sd-bus(3)sd_bus_slot_set_userdata(3)systemd.directives(7)systemd.index(7)