SD_BUS_GET_CURRENT_HANDLER(3)                       sd_bus_get_current_handler

NAME
       sd_bus_get_current_handler, sd_bus_get_current_message,
       sd_bus_get_current_slot, sd_bus_get_current_userdata - Query
       information of the callback a bus object is currently running

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_message_handler_t sd_bus_get_current_handler(sd_bus *bus);

       sd_bus_message* sd_bus_get_current_message(sd_bus *bus);

       sd_bus_slot* sd_bus_get_current_slot(sd_bus *bus);

       void* sd_bus_get_current_userdata(sd_bus *bus);

DESCRIPTION
       Whenever sd-bus is about to invoke a user-supplied callback function,
       it stores the current callback, D-Bus message, slot and userdata
       pointer and allows these to be queried via
       sd_bus_get_current_handler(), sd_bus_get_current_message(),
       sd_bus_get_current_slot() and sd_bus_get_current_userdata(),
       respectively. If bus cannot be resolved or if execution does not reside
       in a user-supplied callback of bus, these functions return NULL.

RETURN VALUE
       On success, these functions 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_get_current_handler(), sd_bus_get_current_message(),
       sd_bus_get_current_slot(), and sd_bus_get_current_userdata() were added
       in version 246.

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

systemd 255                                      SD_BUS_GET_CURRENT_HANDLER(3)