SD_BUS_SLOT_GET_BUS(3)        sd_bus_slot_get_bus       SD_BUS_SLOT_GET_BUS(3)

NAME
       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
       #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_message_handler_t
                                                                sd_bus_slot_get_current_handler(sd_bus_slot
                                                                *slot);

       sd_bus_message *sd_bus_slot_get_current_message(sd_bus_slot *slot);

       void *sd_bus_slot_get_current_userdata(sd_bus_slot *slot);

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

       sd_bus_slot_get_current_handler(), 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
       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
       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 started.

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

systemd 255                                             SD_BUS_SLOT_GET_BUS(3)