Index · Directives systemd 250


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


#include <systemd/sd-bus.h>
void sd_bus_can_send(sd_bus *bus,
 char type);


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.


Returned errors may indicate the following problems:


The bus object bus could not be resolved.


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


The bus object bus was created in a different process.


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)