sd_bus_can_send

systemd

sd_bus_can_send

Check which types can be sent over a bus object

#include <systemd/sd-bus.h>

int

sd_bus_can_send

sd_bus *

bus

char

type

Description

sd_bus_can_send() is mostly used for checking if file descriptor passing is available on the given bus. type can be any of the SD_BUS_TYPE constants.

Return Value

On failure, sd_bus_can_send() returns a negative errno-style error code. If values of the given type can be sent over the given bus, it returns a positive integer. Otherwise, it returns zero.

Errors

Returned errors may indicate the following problems:

-ENOPKG
The bus object bus could not be resolved.

-ENOTCONN
The input parameter bus is NULL or the bus is not connected.

-ECHILD
The bus object bus was created in a different process.

History

sd_bus_can_send() was added in version 221.