# sd_bus_can_send

systemd

sd_bus_can_send

3

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.

# See Also

`systemd(1)`, `sd-bus(3)`