Manpages - sd_bus_get_current_handler.3

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

  #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/);*

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.

On success, these functions return the requested object. On failure, they return NULL.

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

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