SD_BUS_CAN_SEND

Section: sd_bus_can_send (3)
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NAME

sd_bus_can_send - Check which types can be sent over a bus object

SYNOPSIS

#include <systemd/sd-bus.h>

void 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.

NOTES

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