SD_BUS_GET_NAME_MACHINE_ID(3)                       sd_bus_get_name_machine_id

NAME
       sd_bus_get_name_machine_id - Retrieve a bus client's machine identity

SYNOPSIS
       #include <systemd/sd-bus.h>

       int sd_bus_get_name_machine_id(sd_bus *bus, const char *name,
                                      sd_id128_t *machine);

DESCRIPTION
       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.

   Errors
       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, library or module
           instance.

       -ENOMEM
           Memory allocation failed.

NOTES
       Functions described here are available as a shared library, which can
       be compiled against and linked to with the libsystemd pkg-config(1)
       file.

       All functions listed here are thread-agnostic and only a single thread
       may operate on a given object at any given time. Different threads may
       access the same object at different times. Multiple independent objects
       may be used from different threads in parallel.

       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.

HISTORY
       sd_bus_get_name_machine_id() was added in version 221.

SEE ALSO
       systemd(1), sd-bus(3)

systemd 261.2                                    SD_BUS_GET_NAME_MACHINE_ID(3)