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.

       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)