Index · Directives systemd 247

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.

See Also

systemd(1), sd-bus(3)