Index · Directives systemd 250


sd_bus_get_name_machine_id — Retrieve a bus client's machine identity


#include <systemd/sd-bus.h>
int sd_bus_get_name_machine_id(sd_bus *bus,
 const char *name,
 sd_id128_t *machine);


sd_bus_get_name_machine_id() retrieves the D-Bus machine identity of the machine that the bus client identified by name is running on. Internally, it calls the GetMachineId method of the org.freedesktop.DBus.Peer interface. The D-Bus machine identity is a 128-bit UUID. On Linux systems running systemd, this corresponds to the contents of /etc/machine-id. On success, the machine identity is stored in machine.

Return Value

On success, this function returns a non-negative integer. On failure, it returns a negative errno-style error code.


Returned errors may indicate the following problems:


An argument is invalid.


The bus cannot be resolved.


The bus was created in a different process.


Memory allocation failed.


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)