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.
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 2020-07-14. (At that time, the date of the most recent commit that was found in the repos‐ itory was 2020-07-14.) If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to firstname.lastname@example.org systemd 246 SD_BUS_GET_CURRENT_HANDLER(3)
Pages that refer to this page: sd-bus(3), 30-systemd-environment-d-generator(7), systemd.index(7)