systemd sd_bus_get_name_machine_id 3 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. 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: -EINVAL An argument is invalid. -ENOPKG The bus cannot be resolved. -ECHILD The bus was created in a different process. -ENOMEM Memory allocation failed. systemd1, sd-bus3