SD_BUS_GET_CURRENT_HANDLER - Online Linux Manual PageSection : 3
Updated :
Source : systemd 250
Note : sd_bus_get_current_handler

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NAMEsd_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

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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);

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DESCRIPTIONWhenever 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​.

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

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

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SEE ALSOsystemd(1), sd-bus(3) 0

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