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.
Functions described here are available as a shared
library, which can be compiled against and linked to with the
libsystemd
pkg-config(1)
file.
The code described here uses
getenv(3),
which is declared to be not multi-thread-safe. This means that the code calling the functions described
here must not call
setenv(3)
from a parallel thread. It is recommended to only do calls to setenv()
from an early phase of the program when no other threads have been started.